JP7606224B2 - Video Recording System - Google Patents

Description

The present invention relates to a video recording system that employs a cyclic recording system, and more specifically, to a video recording system that, when it detects the occurrence of a problem, can reliably store a specified amount of video before and after the problem occurs and later play back that video.

<Issues with video recording systems as driving recorders>
2. Description of the Related Art Devices called driving recorders, drive recorders, dash cams, etc. (hereinafter simply referred to as "driving recorders" or "driving recorders, etc.") are in widespread use as in-vehicle video recording devices.
These driving recorders are devices that constantly record the inside and outside of the vehicle using a video camera attached to the windshield, dashboard, etc., and their main purpose is to help investigate the cause of an accident by protecting and playing back the footage before and after the accident, etc., in the event of an accident or other trouble that causes an impact to the vehicle body.

As a prior art for a driving recorder, the technology described in Patent Document 1 has been proposed.
This technology is comprised of "a camera that captures the situation in front of the vehicle while it is moving, a recording device that records the video signal from the camera as multiple still images, and an acceleration sensor for detecting the sudden stopping of the vehicle while it is moving," and its purpose is to "record the situation up to several seconds before the accident in still images, in the event of a car accident, to leave objective evidence for later accident investigation."

However, this technology has the problem that it cannot detect minor contact accidents that only cause a slight impact because it is configured to detect the occurrence of an accident or the like using an acceleration sensor.
In addition, aggressive driving has recently become a social problem, and there is a great demand for the ability to record video footage if one is a victim of aggressive driving; however, acceleration sensors are not capable of detecting aggressive driving.

Furthermore, even if a case occurs that does not result in an accident, such as a "near miss," but could have become an accident, there is a possibility that it could develop into trouble between drivers, and it is preferable to detect such cases as trouble as well.

As such, even if an accident does not involve contact or impact, there is a high demand for recording video footage of the events before and after the occurrence of some kind of trouble or the occurrence of an event that may lead to trouble. However, with conventional technology, in order to record this video, manual operations must be performed to protect the video data. If the operation is neglected or performed incorrectly, there is a risk that the video data will be lost.

<Issues with video recording systems in nursing care settings>
In order to cope with the further aging of Japanese society in the future, it is essential to build a "community-based comprehensive care system" that comprehensively ensures medical care, nursing care, prevention, housing, and lifestyle support. To this end, it is essential to ensure a stable supply of nursing care personnel, who are one of the most important foundations, and to create a workplace and labor environment in which nursing care staff can work with peace of mind.
In recent years, in the field of care, the existence of inappropriate behavior such as verbal and physical abuse between those receiving care (elderly people and people with disabilities who require and receive care or assistance) and caregivers (care workers, helpers, and other people engaged in care work) has become apparent and is becoming a social problem.

These problems are not limited to those from caregivers to those in need of care, but also include inappropriate behavior from those in need of care or their families toward caregivers. For example, caregivers may be subjected to physical violence, mental violence, power harassment, or sexual harassment from those in need of care or their families, and various surveys have shown that these problems are on the rise.
This is thought to be related to the fact that nursing care services involve a lot of direct interpersonal services, including visits to the users' homes and physical contact with the users, that the proportion of female staff is high, and that the services are directly related to quality of life and health and cannot be easily discontinued. Some caregivers find this difficult and leave their jobs, which is also one of the causes of the caregiver shortage.

In order to monitor inappropriate behavior that occurs in care facilities and to protect both caregivers and those receiving care, equipment such as surveillance cameras and monitoring cameras have been introduced. By constantly monitoring care facilities, these devices have the effect of preventing or suppressing the occurrence of inappropriate behavior, and are also used to allow a third party to confirm and verify the situation if inappropriate behavior does occur.

The presence of the aforementioned surveillance and monitoring cameras can deter or prevent inappropriate behavior, but on the other hand, there are problems such as the constant monitoring of the care recipient, which violates their privacy. For caregivers too, a work environment in which their caregiving is constantly filmed and can be freely viewed is certainly not a pleasant one.

In order to solve such privacy problems caused by surveillance cameras and the like, the technology described in Patent Document 2 has been proposed.
This technology is configured to "set emergency alert conditions that correspond to the level of care required by each individual person being observed (person receiving care), and by selecting the observation equipment to be connected to the observed person's terminal in accordance with the emergency alert conditions, it is possible to detect emergencies that are suited to the living conditions of each individual person being observed," and has the effect of "resolving issues regarding the privacy and human rights of the observed person, as viewing of images of the observed person taken with a camera is limited to specific people such as family members or the person's doctor, and is limited to when an emergency occurs."
That is, although the camera is constantly taking pictures, the pictures can only be viewed when an emergency occurs, so the privacy of the person being observed and cared for is not violated more than necessary.

However, the technology described in Patent Document 2 uses a motion sensor, Doppler sensor, and thermal camera to detect and notify the care recipient of health problems as a means of detecting the occurrence of an emergency. This equipment is costly to set up, and its installation requires specialized knowledge and skills, making it difficult to install.

In addition, the only factor used to determine whether or not an emergency exists is the health problem of the person receiving care, and there is a problem in that it is not possible to detect problems such as verbal abuse, physical abuse, power harassment, and sexual harassment that may arise between the caregiver and the person receiving care.

JP 5-197858 A Patent Publication 2017-151755

Therefore, the first object of the present invention is to provide a video recording system that can reliably detect the occurrence of a problem that cannot be detected by video analysis or sensors and record the video, in a broad sense of the term.
The second object of the present invention is to provide a video recording system that can reliably detect and record video of accidents other than those involving impacts when used as a driving recorder.
The third object of the present invention is to provide a video recording system for use in nursing care settings that protects the privacy of those being cared for, while reliably detecting the occurrence of inappropriate behavior or other trouble and recording video footage, and that is simple in configuration, easy to install, and low-cost.

The above object of the present invention can be achieved by the following means.
1. In a video recording system for monitoring a subject, a cyclical recording system is adopted in which the captured video is constantly recorded and new video data is written over old video data in sequence.
When a trouble is detected, video data of a predetermined time before and after the trouble is selected and protected from being deleted by overwriting,
A video recording system, wherein the means for detecting the occurrence of a problem is a change in the subject's heart rate.

2. The video recording system of claim 1, characterized in that the subject's heart rate is constantly measured by a wearable device with a heart rate measuring function worn by the subject, and this information is transmitted to the video recording system.

3. The subject's heart rate is detected when a sudden increase or decrease in heart rate is measured.
3. The video recording system according to claim 1, wherein a heart rate exceeding a preset rate of increase or decrease is detected based on the subject's normal heart rate.

4. A video recording system according to any one of claims 1 to 3, characterized in that the subject's pulse is detected when a state of tachycardia or bradycardia is measured.

5. A video recording system according to any one of claims 1 to 4, characterized in that the subject's cardiac condition is constantly monitored by a wearable device with an electrocardiogram function, and symptoms of atrial fibrillation are detected when they are observed.

6. The means of detecting the occurrence of a problem is changes in the subject's heart rate and blood pressure,
A sudden increase or decrease in the subject's blood pressure is detected,
6. The video recording system according to claim 1, wherein the system is configured to detect when a preset rate of increase or decrease is exceeded based on the subject's normal blood pressure.

7. A video recording system used as a driving recorder,
The video recording system according to any one of claims 1 to 6, characterized in that the heart rate of a driver of a vehicle equipped with a driving recorder is constantly measured, and a change in the heart rate is detected as the occurrence of a problem.

8. The video recording system according to claim 7, characterized in that the driver is notified when a trouble is detected.

9. The video recording system according to claim 7 or 8, characterized in that it is configured to slow down or stop the vehicle driven by the subject when the occurrence of a problem is detected.

10. A video recording system for use in a care facility, comprising:
The occurrence of a problem is detected when a specific sound is detected.
7. The video recording system according to claim 1, wherein the specific sound is a prohibited word that is specified as a word that should not be uttered in a nursing care site.

11. The video recording system according to claim 10, characterized in that the specific voice is a specific desire term defined in the care setting as a term used by the care recipient to convey his or her own desires or wants.

12. The person being watched over is a caregiver,
12. The video recording system according to claim 10, further comprising a configuration for detecting and recording any harassment by a care recipient, thereby protecting the caregiver.

13. The video is captured by a glasses-type wearable device equipped with a camera function for capturing video and a microphone function for receiving and collecting surrounding sounds,
The video recording system of any one of claims 10 to 12, characterized in that the glasses-type wearable device is connected via a network to a computer having either or both of a recording function for recording video and sound, or a judgment function for determining whether a sound recorded in a video is a specific sound.

14. The glasses-type wearable device has an intercom function that enables voice communication via a network and a display function that displays video received via the network,
The video recording system of claim 13, characterized in that it is configured to enable the transmission of information consisting of audio and images between a caregiver wearing the glasses-type wearable device and other persons connected via a network.

The invention shown in 1 above is configured to constantly measure the heart rate of the person being watched, and if a change occurs in the heart rate of the person being watched, this is deemed to be the occurrence of a problem, and only the video footage of a specified period of time before and after the change is protected. This means that there is no need to make the situation of the person and their surroundings viewable at all times, and the privacy of the person can be protected, and in the event of a problem, the situation can be checked and verified later.

The reason why the means for detecting the occurrence of trouble was a change in the subject's heart rate is as follows.
Generally, when a person experiences some kind of trouble, such as an accident, the sympathetic nervous system becomes more active due to anxiety, tension, or stress, causing the heart rate to rise sharply. The heart rate may also drop sharply due to trouble such as a deterioration in one's physical condition. In some cases, the pulse interval may become irregular, causing symptoms of premature ventricular contractions. All of these symptoms are types of arrhythmia, and by detecting this arrhythmia state, it is possible to predict the high possibility that some kind of trouble has occurred.
Therefore, in the present invention, a means is employed for detecting a change in the subject's heart rate, i.e., a symptom of arrhythmia in the subject, and determining that this is a sign of trouble.

In this invention, the "occurrence of trouble" refers not only to the occurrence of an actual accident or other trouble, but also to so-called near misses, such as when the subject senses the risk of a trouble occurring or becomes tense due to a change in the surrounding situation. Furthermore, the "occurrence of trouble" also includes cases where the subject's physical condition deteriorates or other health problems arise.

According to the invention shown in 1 above, the occurrence of a trouble can be reliably detected, and the images before and after the trouble can be reliably protected.
In other words, conventional video recording systems are configured to detect the occurrence of a problem using various sensors such as acceleration sensors and real-time video analysis, and record video footage before and after the problem occurs. However, there are problems with this system, such as the inability to detect events in which the sensors do not react, or the inability to detect problems occurring in blind spots of the video.

In contrast, the present invention is configured to constantly measure the subject's heart rate, and if an arrhythmia or the like occurs that is manifested as a change in the heart rate, it detects this as a problem, and is configured to reliably detect any type of problem that occurs. In other words, it is a novel and original configuration in that it does not rely on sensors or video analysis, but focuses on the heart rate, which is a numerical representation of abnormalities such as anxiety, tension, and stress felt by the subject, and detects the occurrence of a problem from changes in this heart rate.

According to the invention shown in 2 above, the subject's heart rate is constantly measured using a wearable device with a heart rate measurement function, such as a portable heart rate monitor or a smart watch with a biosensor. This allows the subject's heart rate to be measured in a way that places less of a burden on them, and ensures that the occurrence of a problem can be detected.

The inventions shown in 3 to 5 above are configured to detect various symptoms indicative of arrhythmia, such as a sudden increase or decrease in heart rate, tachycardia, bradycardia, or atrial fibrillation, and to detect this as the occurrence of a problem, and can propose a more specific method for detecting the occurrence of a problem.

The invention shown in 6 above is configured to constantly measure the blood pressure of the person being monitored, and if a change occurs in the person's blood pressure, this is deemed to be the occurrence of a problem, and only the footage of a specified period of time before and after the change is protected.
The reason why the means for detecting the occurrence of trouble was a change in the subject's blood pressure is as follows.
It is generally known that when a person experiences some kind of trouble, such as an accident, the person feels anxiety, tension, or stress, which causes the excitement to be transmitted to the cardiovascular center in the medulla oblongata, increasing cardiac output and vascular resistance, resulting in a sudden rise in blood pressure. Blood pressure can also drop suddenly due to troubles such as a deterioration in one's physical condition. In this way, by detecting a sudden rise or fall in blood pressure, it is possible to predict the high possibility that some kind of trouble has occurred.
Therefore, in the present invention, a means is employed for detecting a change in the subject's blood pressure and determining that this is an occurrence of a problem.
According to the invention shown in 6 above, by detecting changes in blood pressure as well as changes in heart rate, the occurrence of a problem can be detected more reliably, and images before and after the problem can be reliably protected.

The invention shown in 7 above is an example of application in which the video recording system of the present invention is used in a driving recorder, which can reliably detect any trouble that may occur while driving a vehicle (including automobiles, motorcycles, bicycles, etc.) (including while the vehicle is moving and while stopped), and can protect the video data before and after the trouble.
In particular, this system has a novel and significant effect in that it can detect situations in which the driver feels anxious, tense, or stressed, even when there is no contact or collision that the acceleration sensor does not react to, or when there is a problem that cannot be detected by video analysis due to the presence of blind spots, etc.
In addition, the "vehicle equipped with a driving recorder" in 7 above includes cases where the driving recorder is attached to the driver himself or to equipment worn by the driver, such as a helmet.

According to the invention shown in 8 above, when the occurrence of a trouble is detected, the driver is notified of this, which is expected to encourage the driver to review the situation objectively.
For example, the system could objectively notify the driver of his or her own poor physical condition, such as, "Your heart rate is dropping. Are you feeling unwell?" This is expected to help the driver take appropriate action, such as slowing down or stopping the vehicle.

According to the invention shown in 9 above, when the occurrence of a problem is detected, the system responds in conjunction with the vehicle, such as by slowing down or stopping the vehicle, which is expected to have the effect of preventing accidents, etc.
For example, if an operating error occurs, such as confusing the brake and accelerator, the driver will panic and be unable to take appropriate action such as stopping the vehicle. In this case, however, the driver's heart rate is likely to rise sharply. If this condition could be detected and appropriate action such as automatically slowing down or stopping the vehicle could be taken, accidents could be prevented.

The invention shown in 10 above is configured to continuously record the care site, but when a problem such as inappropriate behavior or a deterioration in health occurs, only a specified period of video footage before and after the problem is recorded. This means that there is no need to make the condition of the care recipient available for viewing at all times, protecting the privacy of the care recipient, and, when a problem does occur, the condition can be checked and verified later.

In addition, the existence of this video recording system creates awareness that if a problem occurs, the footage before and after the incident can be checked later, which is expected to have the effect of preventing or suppressing problems for both the care recipient and the caregiver.

Furthermore, by adopting a means for detecting the occurrence of a specific sound as a means for detecting the occurrence of a problem, it is possible to reliably detect the occurrence of a problem without using advanced technology such as video analysis. This allows for a simplified configuration, making it possible to provide a low-cost video recording system. Furthermore, installation is easy as it does not require special knowledge or skills, and the time and cost required for installation can be reduced.

Furthermore, with methods of detecting the occurrence of trouble using video analysis, there is a problem in that it is difficult to detect trouble occurring in blind spots, but the configuration of the present invention, which detects the occurrence of specific sounds, can solve this problem and make it possible to more reliably detect the occurrence of trouble.

The invention shown in 10 above is configured to focus on prohibited words in nursing care sites as a means for detecting the occurrence of trouble.
Prohibited terms in the nursing care field are specified by each nursing care facility and each nursing care-related organization, and can be adopted according to any standard. These prohibited terms are terms and expressions that must not be used in the nursing care field, and when these prohibited terms are used, it is highly likely that some kind of trouble will occur between the care recipient and the caregiver.
Therefore, the occurrence of a problem can be determined and detected more reliably.

In addition, according to the invention shown in 10 above, each time a problem occurs in the nursing care site, video footage of the time before and after the problem occurs is saved, and this video data can be accumulated. Using this video data, it is possible to understand the causes of problems and situations in which problems are likely to occur, to study tendencies in how to respond to problems that are likely to occur, solutions to problems, and ways to avoid problems.

Currently, the solutions and avoidance measures for problems in the field of nursing care largely depend on the know-how of each nursing facility and caregiver, and this know-how is not shared among nursing care facilities nationwide. As a result, there are differences in the level of understanding and ability to solve and avoid problems between nursing facilities and caregivers.
The video data accumulated by the video recording system of the present invention can be used to study solutions and avoidance measures for problems, and if this information is made available to care facilities across the country, it will be possible to reduce problems in care facilities nationwide.

As mentioned above, the video recording system of the present invention is expected to have a deterrent effect on trouble, and it is also expected that the occurrence of trouble will be further suppressed by advancing research into ways to prevent trouble based on accumulated video data of trouble occurrence. This will reduce the number of caregivers who quit their jobs due to trouble occurrences, and is expected to help solve the problem of the shortage of caregivers.

Furthermore, it is believed that this project can contribute to one of the SDGs (Sustainable Development Goals), "3. Ensure good health and well-being for all."

The invention shown in 11 above is configured to focus on specific desire terms, which are terms used by the care recipient to the caregiver and are defined in the care setting as terms that convey one's own needs or desires, as an element for determining and managing the occurrence of trouble.

These specific desire terms are words that are sometimes uttered by those receiving care towards their caregivers, and examples of this include abusive language. Abusive language uttered by those receiving care is often an expression of their own needs and desires, but due to stress caused by mental and physical illness or the effects of dementia, they may not be able to express these well, resulting in abusive language directed at the caregiver. When these abusive language and other specific desire terms are uttered, it can cause strong stress, especially for inexperienced caregivers, and can lead to problems.

Therefore, by detecting the utterance of this specific desire term, it is possible to predict the occurrence of trouble. Furthermore, if it is possible to predict and detect the occurrence of trouble in advance, it is possible to notify the caregiver that there is a risk of trouble occurring, and the caregiver who receives this notification can take care to prevent trouble from occurring. Furthermore, if the prediction of the occurrence of trouble is notified to the manager of the caregiver in charge, it is possible to encourage a change in the caregiver in charge or improvements in the response, thereby preventing trouble before it occurs.

The invention shown in 12 above aims to limit the purpose of the video recording system according to the present invention to protection of the caregiver.
Conventional video recording systems (surveillance cameras, security cameras, etc.) used in care facilities are used for the purpose of protecting the care recipients, that is, by monitoring abusive language and violence from caregivers towards the care recipients, and are equipped with the functions for this purpose.
On the other hand, the invention shown in 12 above is a system that detects the occurrence of harassment (such as power harassment or sexual harassment) against caregivers by the care recipient or their family, records the footage, and protects them, which is an unprecedented idea in that it aims to protect caregivers.

The inventions shown in 13 and 14 above are configured to use a glasses-type wearable device as a device for capturing images.
Glasses-type wearable devices have been proposed that are equipped with camera functions, microphone functions, intercom functions, display functions, etc., and by adopting these as the hardware to realize the video recording system of the present invention, it will be possible to monitor care sites in environments where cameras are not installed, such as home care, and the work and costs required for installing cameras can be significantly reduced.

In addition, because the glasses-type wearable device is configured to be able to communicate with other computers etc. via a network, the state of the person being cared for and their surroundings can be observed by those operating other computers etc., and any deficiencies in the caregiver's response can be pointed out, and the caregiver can also inquire about how to respond, making it possible to use it as a care support system, coaching system, etc.

FIG. 1 is a schematic diagram showing an embodiment of a video recording system according to the present invention; 1 is a flowchart showing the operation of a video recording system according to the present invention. FIG. 1 is a schematic diagram showing an embodiment in which a video recording system is used as a surveillance camera in a nursing care site. FIG. 1 is a schematic diagram showing an embodiment of an imaging device (integrated type); FIG. 1 is a schematic diagram showing an embodiment of an imaging device (separate type); FIG. 1 is a schematic perspective view showing an example of a glasses-type wearable device. Schematic diagram illustrating the means for determining the risk of aspiration

The configuration of the video recording system according to the present invention will be explained with reference to the drawings.

<Outline of the video recording system according to the present invention>
FIG. 1 is a schematic diagram illustrating an example of an outline of a video recording system 1 according to the present invention (hereinafter, also simply referred to as the "video recording system 1").
As shown in Figure 1, the video recording system 1 is composed of a camera 2 that captures images of the person being watched over M and/or his/her surroundings, and a heart rate measuring device 3 worn by the person being watched over M, and the camera 2 and heart rate measuring device 3 are connected via a wireless network N.

The photographing device 2 has a camera function 21 for photographing images, a microphone function 22 for receiving and collecting surrounding sounds, a recording function 23 for recording and saving the photographed images (including the "sound" received and collected by the microphone function; the same applies below), and a communication function 24 for connecting to the heart rate measuring device 3 via a network.

The recording function 23 may be configured to use a memory device (such as a hard disk drive or solid state drive) built into the image capture device 2, or a memory card (such as an SD card or USB memory) that can be removed from the image capture device 2.

The communication function 24 is a function for connecting to the heart rate measuring device 3 via the network N, and is also a function for connecting to other computers, smartphones, smart glasses, and other portable information terminals.
There is no limitation on the type of network, and any publicly known and publicly used network can be used without any special restrictions. However, in consideration of the connection with the heart rate measuring device 3 worn by the subject M, a wireless network is preferable, and for example, a wireless LAN (local area network), a short-range wireless communication such as Bluetooth (registered trademark), a mobile communication system used as a mobile phone line (3G, 4G, 5G (including local 5G and private 5G)), etc. can be used.

There is no limitation on the specific configuration of the imaging device 2 used in the present invention, and any known and publicly used imaging device can be used without any special restrictions. For example, a commercially available imaging device as a driving recorder may be used.

The heart rate measuring device 3 is a device that measures the heart rate of the subject M. In addition to a function of constantly measuring the heart rate, the heart rate measuring device 3 has a notification function for connecting to the recording device 2 via the network N.
There is no limitation on the specific configuration of the heart rate measuring device 3, and any publicly known and publicly used heart rate measuring device can be used without any particular restriction.

Examples of the heart rate measuring device 3 used in the present invention include a heart rate monitor worn by the subject M, and a sensing device using a camera that can measure without contact without the subject M wearing any device.

A heart rate monitor is a device worn by a subject M to measure in contact with the body, and a configuration in which it is worn on a finger, wrist, or chest is known. Recently, wearable devices that do not only simply measure heart rate but also have computer functions such as smartphones have become widely known, and a wearable device with a heart rate measurement function can be used as the heart rate measurement device 3 in the present invention. For example, if a smart watch with a biosensor in the form of a wristwatch is used, it can be obtained relatively easily and inexpensively, the physical burden on the subject M when wearing it is small, the heart rate can be measured at all times, and the information can be transmitted to another device (such as the imaging device 2) via the network N.
Furthermore, when electrocardiogram measurement is required, a wearable device with a heart rate monitor and an electrocardiogram function, such as a portable electrocardiogram or a smart watch with an electrocardiogram function, can be used as the heart rate measuring device 3 of the present invention. This heart rate measuring device 3 may be a device called an activity meter or a biosensor.

The heart rate measuring device 3 used in the present invention may employ measurement technology using a near-infrared camera that is capable of measuring the heart rate from a distance without the subject M having to wear it.
Specifically, a configuration is known in which an infrared pattern is irradiated onto a human body (subject M), and the infrared image obtained by reflection is analyzed and measured. This technology is a technology in which the subject M irradiated with near-infrared light is photographed with a near-infrared camera, pulse information (information detected from changes in hemoglobin in the blood on the skin surface) is detected from this image, and the heart rate is calculated from the detected pulse information. By using near-infrared light instead of visible light, it is possible to measure the heart rate regardless of day or night, or whether it is light or dark.
If this heart rate measuring means is adopted as the heart rate measuring device 3, then by mounting it on the photographing device 2, the functions of the photographing device 2 and the heart rate measuring device 3 can be fulfilled by a single device.

In the present invention, the term "heart rate" includes the meaning of "pulse rate".
As a medical term, heart rate means the number of times the heart beats per minute, while pulse rate means the number of times the blood vessels in each part of the body beat per minute, so strictly speaking, the meanings are different. In the present invention, the body parts where the heart rate is measured are often the blood vessels in each part, so strictly speaking, the "pulse rate" is being measured.
However, as mentioned above, in the present invention, no distinction is made between the terms "heart rate" and "pulse rate", and the term "heart rate" is primarily used.

<Detailed configuration of the video recording system according to the present invention>
Next, a flow of operations relating to the implementation of the video recording system 1 according to the present invention will be described.
First, a state is prepared in which the heart rate of the person M to be watched over can be constantly measured. As one method, the person M is made to wear a heart rate measuring device 3 (for example, a wearable terminal with a heart rate measuring function). The embodiment of Fig. 1 is an example in which the person M wears a wearable terminal G with a heart rate measuring function as the heart rate measuring device 3. As another method, a state is prepared in which the heart rate sensing of the person M is possible (a state in which near-infrared light can be irradiated and an image can be taken with a near-infrared camera).

Next, a range for detecting a change in heart rate is set. If a change in the set heart rate is detected, this is assumed to be a problem, and the video data is protected as described below.
A first example of the setting of a heart rate change is a state in which the heart rate of the subject M increases or decreases suddenly. An increase or decrease value and an increase or decrease rate are set based on the normal heart rate of the subject M. The normal heart rate may be manually input by the subject M, or may be automatically measured when the heart rate measuring device 3 is worn.

For example, a setting can be made such that if the subject M's normal heart rate increases or decreases by 20 bpm or more within a specified period of time, this is detected as a change in heart rate (i.e., the occurrence of a problem). Another setting can be made such that if the subject M's normal heart rate increases or decreases by 30% or more within a specified period of time, this is detected as a change in heart rate (i.e., the occurrence of a problem).

A second example of a change in heart rate is when the subject's pulse is measured to be in a tachycardia or bradycardia state, and this is detected as a change in the heart rate (i.e., the occurrence of a problem).
Tachycardia refers to a condition in which the heart rate is increased, generally a heart rate exceeding 100 bpm. Bradycardia refers to a condition in which the heart rate is decreased, generally a heart rate less than 60 bpm.

For example, the heart rate measuring device 3 is set to define a tachycardia state as a heart rate exceeding 100 bpm and a bradycardia state as a heart rate below 60 bpm, and when setting the change in heart rate, the device is set to detect the tachycardia or bradycardia state as a change in heart rate.
Note that normal heart rates vary from person to person, and some people, such as athletes with sports hearts, have extremely low normal heart rates. In this case, it is preferable to adopt a method of setting the increase or decrease value, increase rate, or decrease rate based on the normal heart rate of the subject M described above.

The second example of heart rate change mentioned above is detecting a state of tachycardia or bradycardia to infer that the subject is experiencing the symptom of "palpitations."
Palpitations are generally defined as an uncomfortable feeling or discomfort felt when the heart beats faster, slower, or irregularly. This uncomfortable feeling or discomfort is subjective to the subject M and cannot be detected by a heart rate measuring device. Therefore, in order to grasp the state in which the heart beats faster or slower, the state of tachycardia or bradycardia is detected.
If symptoms of arrhythmia such as tachycardia or bradycardia, the sudden increase or decrease in heart rate mentioned above, and premature contractions described below appear, it is highly likely that subject M feels discomfort or strangeness in the movement of his or her heart, and therefore the subject will sense these conditions as a change in heart rate, i.e., the occurrence of a problem.

As a third example of a change in heart rate, a case where the subject M's pulse is measured to be in a state of premature contraction is taken as an example, and this is detected as a change in heart rate (i.e., the occurrence of a problem).
Premature ventricular contractions are arrhythmias in which the heart contracts faster than its normal cycle due to abnormal stimulation, and refer to a state in which a fast pulse occasionally mixes in with a normal, regular pulse. In order to detect the state of premature ventricular contractions, a heart rate measuring device 3 can be used to measure the interval between pulses with high accuracy, or a heart rate measuring device 3 with an electrocardiogram function can be used to detect the state of premature ventricular contractions.

A fourth example of a change in heart rate is when the subject M's heart shows symptoms of atrial fibrillation, which is detected as a change in heart rate (i.e., the occurrence of a problem).
Atrial fibrillation is a type of arrhythmia in which the atria flap and contract rapidly and partially without stimulation from the sinoatrial node. Regular sinoatrial node activity is not transmitted, and ventricular contractions occur at irregular intervals.

It is known that during a normal pulse (sinus rhythm), a set of P waves, which indicate excitation of the atria, and QRS waves, which indicate excitation of the ventricles, appear at regular intervals. On the other hand, it is known that in atrial fibrillation, the P waves disappear, finely pulsating fibrillation waves are generated, the regularity of the QRS waves is lost, and the pulse becomes irregular.
That is, to detect the state of atrial fibrillation, an examination using an electrocardiogram that can observe P waves and QRS waves is necessary, and in the present invention, a means for detection using a heart rate measuring device 3 with an electrocardiogram function can be given. Wearable terminals with an electrocardiogram function (for example, portable electrocardiographs and smart watches with biosensors) are commercially available, and these can be used.

The above-mentioned tachycardia, bradycardia, premature ventricular contractions, and atrial fibrillation are types of "arrhythmia" in which the electrical signals of the heart are disturbed, and by detecting the symptoms of this arrhythmia, it is possible to determine the possibility of heart disease, such as angina pectoris or myocardial infarction. Therefore, by detecting these symptoms, it is possible to sense that subject M has developed some kind of health problem, such as heart disease, i.e., that a health problem has occurred.

A normal heart rate measuring means needs to measure the number of beats per minute, so it takes at least one minute to detect a change in the heart rate. This method may not be sufficient to quickly detect the occurrence of a problem. Therefore, in the present invention, it is preferable to adopt a means for quickly detecting a change in the heart rate using the following method.
As an example, a method can be considered in which the heart rate is calculated by constantly counting the number of heartbeats for one minute from the starting point, starting from one minute before the current time.

As another example, a method of predicting the heart rate from the pulse interval can be considered. When the normal heart rate is 60 bpm, the pulse interval is 1 second. If the pulse interval becomes 0.5 seconds, the heart rate is 120 bpm, which is double the normal rate. With this method, it is possible to detect changes in the heart rate in as little as a few seconds.
As another example, a method of prediction based on the pulse rate for 10 seconds can be considered. When the normal heart rate is 60 bpm, the number of beats per second is 1, and the number of beats per 10 seconds is 10. If this number of beats per 10 seconds is 15, this is converted to 90 beats per minute, and the heart rate is 30 bpm higher than normal. With this method, it is possible to detect a change in the heart rate in 10 seconds, for example.

So far, the present invention has been described in terms of the means for detecting the occurrence of a problem using changes in heart rate. In addition to changes in heart rate, changes in blood pressure can also be used as a means for detecting the occurrence of a problem.
It is known that the driver's blood pressure rises while driving a vehicle. For example, it has been reported that even when driving safely at a speed of about 30 to 40 km per hour, the systolic blood pressure rises by an average of 25 mmHg, and when driving slalom at a speed of 60 to 80 km per hour, the systolic blood pressure rises by an average of 43 mmHg. This is thought to be caused by stress caused by tension while driving. These blood pressure rises can be said to be average values for blood pressure rises while driving, but if a rise is observed beyond this, it is thought that there is another cause. Possible causes include worsening driving conditions due to bad weather, vehicle troubles such as breakdowns, reckless or suspicious driving by oneself or others, and damage from tailgating. When these troubles occur, the driver feels more stress than when driving normally, and it is thought that blood pressure also rises more than when driving normally.
Besides driving a vehicle, if the subject M encounters a situation that makes him/her feel anger, fear, anxiety, surprise, etc., the blood pressure of the subject M who feels this will rise. For example, in relation to the use of the video recording system 1 in a nursing care site described below, it is thought that caregiver Z who is subjected to verbal abuse and violence from care recipient Y will be highly stressed. In such cases, as described above, the heart rate will change, such as increasing, and blood pressure will also change, such as increasing.
Therefore, if a change in blood pressure is used as a means for detecting the occurrence of trouble in addition to a change in heart rate, it is possible to more reliably detect the occurrence of trouble. Also, instead of a change in heart rate, a change in blood pressure can be used as a means for detecting the occurrence of trouble.

As described above, the present invention can employ a configuration that detects a sudden increase or decrease in the blood pressure of subject M as a problem occurring to subject M or his/her surroundings.
The range of what is detected as a sudden increase or decrease in blood pressure can be set arbitrarily by the subject M, etc. For example, a setting can be made such that, based on the subject M's normal blood pressure, if the systolic blood pressure (systolic blood pressure) increases or decreases by 25 mmHg or more in a predetermined time, this is detected as a change in blood pressure (i.e., the occurrence of a problem). Another setting can be made such that, based on the subject M's normal blood pressure, if the systolic blood pressure (systolic blood pressure) increases or decreases by 20% or more in a predetermined time, this is detected as a change in blood pressure (i.e., the occurrence of a problem).
In addition, if the above-mentioned predetermined time is long, such as one hour, it takes time to detect and the change cannot be considered sudden, so it is not preferable. Therefore, it is preferable to set it to a short time, such as 30 seconds or one minute. In addition, although the above explanation has been given as an example of an increase or decrease in maximum blood pressure (systolic blood pressure), this may be set as the minimum blood pressure (diastolic blood pressure).
Recently, portable and wristwatch-type blood pressure monitors, known as wearable blood pressure monitors, etc., have become commercially available. If the subject M wears this wearable blood pressure monitor separately, or wears the above-mentioned wearable device with heart rate measurement function to which a blood pressure measurement function has been added, the subject M's blood pressure can be constantly measured, and changes in blood pressure can be detected.

Next, the cyclic recording using the image capturing device 2 will be described.
Circular recording is a method of storing images in which the captured image is constantly recorded, and new image data is written over old image data in sequence, and is widely used as an image storage method for surveillance cameras and driving recorders. This method is often adopted because image data is large in data volume and the memory capacity of recording devices is limited.
The present invention employs a cyclical recording system, and when a problem occurs, video data of a predetermined time before and after the occurrence of the problem is automatically selected and protected and saved so that it is not deleted by overwriting. In other words, video data is normally saved and deleted sequentially by overwriting, but the video data of a predetermined time before and after the occurrence of the problem is protected so that it is not saved and overwritten. The present invention is configured to detect the occurrence of the problem by a change in the heart rate of the subject M.

The time period for which video data is protected can be preset. Any time period can be set, such as automatically protecting 60 seconds of video data before and after a problem occurs. It is also possible to set the system to protect all video data during the period when changes in heart rate continue, in addition to the video data before and after a problem occurs.

Furthermore, in addition to protecting the video data before and after the occurrence of the problem, it is preferable to also record and protect the heart rate data that detects the problem. This is because changes in heart rate can be useful in determining the cause of the problem, for example in the case of a sudden illness such as a myocardial infarction.

In the video recording system 1, the device that detects the change in heart rate may be either the imaging device 2 or the heart rate measuring device 3. The heart rate measuring device 3 may constantly transfer the measurement results of the subject M's heart rate to the imaging device 2, and the imaging device 2 may determine whether or not there is a change in the heart rate based on the results. Alternatively, the heart rate measuring device 3 may determine whether or not there is a change in the heart rate, and then notify the imaging device 2 that there is a change in the heart rate (i.e., that it has detected the occurrence of a problem).

2 is a flow chart showing an example of the operation of the video recording system 1. The flow of the operation of the video recording system 1 will be described with reference to this diagram.
First, the image capturing device 2 starts capturing images of the subject M and/or his/her surroundings, and starts cyclic recording of the image data obtained by the capturing. At this time, the time period of the image data to be protected before and after the occurrence of the trouble can be set so as not to be deleted by overwriting.

When the cyclical recording starts, continuous measurement of the heart rate of the subject M is started. If electrocardiogram monitoring is required, monitoring is started at the same time. When the subject M realizes that the heart rate cannot be measured because the subject M is not wearing the heart rate measuring device 3, for example, a configuration may be adopted in which an alert or the like is used to notify the subject M of this.
At this time, the range within which a change in heart rate is detected can be set manually by the subject M or automatically by the video recording system 1 .
The start of the cyclic recording and the start of the heart rate measurement may be inverted.

Next, a determination is made constantly in real time as to whether the constantly measured heart rate of the subject M falls within a set range that is detectable as a change in heart rate.
If the change in heart rate falls within a preset range, it is detected as a problem.

In Figure 2, "specific sound" is listed as a judgment factor, but this is a judgment factor used in the video recording system 1 at the nursing care site, and will be described in detail later. Also, although not shown in Figure 2, changes in blood pressure can be added as a detection means in addition to changes in heart rate.

If a problem is detected, video data before and after the problem occurs is automatically selected and protected.
In addition, if necessary, the subject M is notified that the change in heart rate falls within the set range, i.e., that a problem has been detected. The notification destination may be not only the subject M, but also another person (person to be notified) set in advance.

Furthermore, if necessary, a command is issued to an object associated with the video recording system 1 (e.g., a vehicle, a security system, a monitoring system, etc.) to execute a pre-set operation. For example, if the object is a vehicle, the command may be to slow down or stop, and if the object is a security system, the command may be to notify a security management company, police, or fire department.

The above-mentioned operations are repeated unless the subject M or other person stops the operation of the video recording system 1 (termination process).

<Use as a driving recorder>
Next, an application example in which the video recording system 1 according to the present invention is used as a driving recorder will be described.
A driving recorder is an in-vehicle video recording device that is installed primarily for the purpose of recording situations such as video footage of car accidents. A typical driving recorder uses an acceleration sensor or other device to detect impacts caused by a collision or other accident, and protects video data before and after the accident.
However, this configuration for detecting impacts to protect video data has the problem that it cannot detect accidents that do not involve impacts such as contact or that involve only a weak impact, such as damage caused by aggressive driving or attempted accidents. In these cases, the driver must manually protect the video data.

The video recording system 1 according to the present invention is configured to detect changes in the heart rate of the subject M (the driver in the case of a driving recorder) as the occurrence of a problem, and can reliably detect problems that do not involve the above-mentioned shocks.

When a driver is a victim of aggressive driving, or an accident or attempted accident occurs due to an elderly driver mistaking the accelerator for the brake, or other attempted accidents, the driver feels anxious, tense, or stressed, which in most cases causes an increase in heart rate. Also, when an abnormality occurs in the driver's physical condition, such as an abnormality in cardiac function, the heart rate often slows or the pulse becomes irregular. Collectively, these symptoms are considered arrhythmia, and if arrhythmia symptoms are detected as a sign of trouble (including situations that may develop into trouble), video data before and after the trouble can be reliably and automatically protected, and can be used to record the situation of the trouble and identify its cause.

When the video recording system 1 is used as a driving recorder, the image capturing device 2 is installed in a part of the vehicle, such as the dashboard or windshield. If the vehicle is a motorcycle or bicycle, the image capturing device 2 may be attached near the handlebars or on equipment such as a helmet worn by the driver.

The heart rate measuring device 3 may be a wearable G (e.g., a smart watch) with a heart rate measuring function worn by the driver. In addition, by utilizing the above-mentioned heart rate measuring means using a near-infrared camera, an environment in which the driver's heart rate can be measured at all times may be created by equipping the photographing device 2 or a car navigation system with near-infrared light irradiation and near-infrared camera functions.
As described above, a change in blood pressure may be used as well as a change in heart rate to detect the occurrence of a problem. In this case, the heart rate measuring device 3 worn by the subject M is provided with a blood pressure measuring function.

The camera 2 and the heart rate measuring device 3 are connected by a communication means such as Bluetooth (registered trademark), and when the heart rate measuring device 3 detects a change in the driver's heart rate (the occurrence of a problem), it transmits this to the camera 2, and the camera 2 protects the video data before and after the problem occurs.

Furthermore, if the heart rate measuring device 3 detects a problem and notifies the driver with sound or light, it is expected that the driver will be made aware of symptoms of poor health that they are unaware of, and this will prevent or suppress the escalation of the condition into an accident. For example, if the driver's own poor health can be objectively notified, such as "Your heart rate is dropping. Are you feeling unwell?", the driver will be able to take appropriate measures, such as slowing down or stopping the vehicle, thereby preventing an accident.

Furthermore, if the heart rate measuring device 3 is set to slow down or stop the vehicle when it detects the occurrence of a problem, it is expected that the effect of preventing the development of a serious accident can be prevented even if the driver is unconscious or has lost consciousness due to a decline in cardiopulmonary function. Recently, there have been many accidents caused by elderly people and others mistaking the accelerator for the brake, and even in such cases, the driver becomes upset and their heart rate increases. If this situation can be detected as the occurrence of a problem as soon as possible, it is possible to prevent the development of a serious accident.

A driving recorder using the present invention is also useful for providing as an automobile insurance service.
Some automobile insurance companies provide driving recorders to monitor policyholders (drivers), which provide services such as automatic reporting in the event of an accident, recording of the situation at the time of the accident, and support alerts for safe driving. However, the driving recorders currently in use have a problem in that these services do not function unless an impact that reacts to an acceleration sensor occurs. Therefore, a driving recorder using the present invention is suitable because it can detect troubles that do not involve impacts, and can also detect poor physical condition, drowsiness, and the like of the driver by changes in heart rate, and can record and store specific video data for protection.

<Use as a video recording system in nursing care facilities>
Next, an application example in which the video recording system 1 according to the present invention is used as a surveillance camera in a nursing care site will be described.

Figure 3 is a schematic diagram showing an example of using the video recording system 1 as a surveillance camera in a care facility, depicting the state of room R of care recipient Y in a care facility.

3, an image capturing device 2 is installed on the ceiling of a room R, and the entire room R is captured by the image capturing device 2. The state of the care recipient Y in the room R is constantly captured, and even when a caregiver Z enters the room to provide care, the state of care including the caregiver Z is captured.
In FIG. 3, one imaging device 2 is installed in one room, but two or more devices may be installed, and the installation location is not limited to the ceiling, but may also be on a wall, a desk, or a shelf.

The image capture device 2 is also equipped with a camera function 21 and a microphone function 22, and is configured to constantly record not only images but also sounds (including voices and noises) generated in the living room R as image data. Unless otherwise specified, the term "image data" in this specification includes both images and sounds.

In FIG. 3, the imaging device 2 includes a microphone function 22 and is installed as an integrated piece of equipment. However, since the microphone function 22 built into the imaging device 2 alone may not be able to pick up the sounds in the entire living room R, one or more devices with a microphone function may be installed in various locations in the living room R, separate from the imaging device 2.

It is preferable to install multiple separate devices having microphone function 22 in various locations used by care recipient Y, such as care recipient Y's room R, the nursing facility's dining room, hallway, bathroom, and toilet. As will be described later, the video recording system 1 according to the present invention is configured to detect trouble, etc., when a specific sound is generated, so it is necessary to prepare an environment in which all sounds generated in various locations can be received and collected without omission.

If the photographing device 2 is equipped with a recording function 23, the photographed video is recorded as video data in this photographing device 2. If the photographing device 2 is not equipped with a recording function 23, the video data is transferred using an optional communication function 24 to another device with a video recording function, such as another computer (including a server) C, and the video data is recorded. The video data recorded here is configured so that new video data is written over old video data in sequence, i.e., it is recorded in a circular manner.

The contents of this video data are monitored in real time by the audio determination function 25, which constantly checks the contents of the sound data contained in the video data and constantly monitors for the occurrence of specific sounds. Specifically, what is assumed to be specific sounds is compiled into a database, and sounds generated at the care site are compared with the contents of the database to constantly determine whether specific sounds have been generated. Details of these specific sounds will be described later.

When the generation of a specific sound is detected, this is deemed to be the occurrence of a problem, and a specified period of video data before and after the occurrence of the problem is selected from the recorded video data, and this data is protected so that it is not deleted by overwriting. The specified period of time for which the video data is protected can be set arbitrarily.

As a means for protecting the video data for a specified period of time before and after the occurrence of a problem, a means for transmitting the video data via a network to another device with a data recording function may be adopted. For example, a method for protecting the video data can be adopted in which the video data is transmitted to a computer or a mobile information terminal owned by a care facility or the family of the person receiving care.

In addition, when the generation of a specific sound (occurrence of a problem) is detected, a notification is sent to a pre-designated person (hereinafter also referred to as a "notification recipient"), such as the care facility manager, each caregiver, or the family of the person being cared for. Specifically, the notification is sent to the pre-designated notification recipient's mobile phone, smartphone, personal computer, etc., via email, SNS, dedicated application software, etc.

Furthermore, when the generation of a specific sound (occurrence of a trouble) is detected, the video data for a predetermined period of time before and after the occurrence of the specific sound that was protected as described above can be played back, allowing the video to be reviewed. In other words, the configuration may be such that viewing of the video data is restricted unless the occurrence of a trouble is detected. This is because if the video data is constantly viewable, there is a risk of violating the privacy of the person being cared for.

In this way, an example in which the video recording system 1 according to the present invention is applied to a surveillance camera in a nursing care site is characterized by the fact that the occurrence of a specific event, such as a problem, is judged and detected by sound.

So far, we have explained that the means for detecting the occurrence of trouble is a specific sound generated at the care site, but changes in the heart rate of the subject M can also be used. The means for detecting trouble at the care site can be either a change in the heart rate of the subject M or the generation of a specific sound, or both.

In an example in which the video recording system 1 according to the present invention is applied to a surveillance camera in a care site, unlike conventional surveillance cameras, the subject of surveillance is not the care recipient Y but the caregiver Z. Therefore, the subject of surveillance M here becomes the caregiver Z.

The caregiver Z, who is the person M being watched over, wears a wearable terminal G (such as a smart watch) with a heart rate measurement function as a heart rate measurement device 3, and the heart rate is measured constantly.
In the field of care, troubles can occur due to verbal abuse or harassment from the care recipient Y or related parties such as their family, or due to the behavior of caregiver Z. Regardless of the cause, caregiver Z will feel excitement, anxiety, tension, or stress caused by anger, etc., and in many cases, his or her heart rate will increase. By detecting this increase in heart rate as a sign of trouble, it is possible to reliably detect the occurrence of trouble in the field of care.
Although the subject whose heart rate is to be measured can be the care recipient Y, many of the care recipients Y suffer from dementia, etc., and problems such as the care recipient Y removing the heart rate measuring device 3 without permission can easily occur.
As described above, a change in blood pressure may be used as well as a change in heart rate to detect the occurrence of a problem. In this case, the heart rate measuring device 3 worn by the caregiver Z, who is the subject M, is provided with a blood pressure measuring function.

When the video recording system 1 of the present invention is used as a surveillance camera in a care site, the occurrence of trouble can be detected more reliably by detecting changes in the subject M's heart rate as the occurrence of trouble and also detecting the occurrence of a specific sound as the occurrence of trouble. Since neither changes in heart rate nor the occurrence of a specific sound are detected by video, there is no need to monitor the video at all times, and the privacy of the care recipient Y can be protected.

<Detailed explanation of the video recording system in the nursing care field>
Next, a detailed configuration of the video recording system 1 according to the present invention used in a nursing care site will be described.
The video recording system 1 is made up of a photographing device 2 and a heart rate measuring device 3 .

The photographing device 2 has a camera function 21 and a microphone function 22, and may also have a recording function 23, a communication function 24, and a voice determination function 25 within the same device. In other words, some or all of the functions of the recording function 23 etc. may be integrated into one or more devices. Thus, for example, the recording function 23 may use the functions of a separate recording device.

An embodiment of the image capturing device 2 is shown in FIGS.
4 shows an example of a configuration in which the various functions are integrated, with the camera function 21, microphone function 22, recording function 23, communication function 24, and voice determination function 25 being configured as a single device (hereinafter referred to as an "integrated type"). If an integrated type configuration is adopted for the imaging device 2, the task of installing it in the room of the care recipient or the like is easy and simple.

Figure 5 shows an example in which some functions are integrated, but other functions are configured separately (hereinafter referred to as "separate type"). Specifically, the camera function 21, microphone function 22, and communication function 24 are configured as a single device (imaging device 2) and installed in room R, and the recording function 23, communication function 24, and voice determination function 25 are incorporated in computer C in another room connected to this via network N.

In the case of the separated type shown in FIG. 5, video data consisting of images and sounds captured and collected by the camera function 21 and microphone function 22 is transferred to computer C via network N.

The video data transferred to computer C is cyclically recorded using the recording function 23. The transferred video data is also judged in real time by the audio determination function 25 as to whether or not it contains a specific audio. If it is judged that the specific audio is included, this is determined to be the occurrence of a problem, and the video data for a predetermined period of time before and after the occurrence of the problem is protected from being erased.
In addition, in the separate type, if the communication function 24 of the imaging device 2 detects a change in the heart rate of the subject M (caregiver Z), the information is transferred to computer C, and the video data before and after the occurrence of the trouble is protected from being erased in computer C.

The video recording system 1 used in a care site has a voice determination function 25 .
The voice determination function 25 is a function that determines whether or not the voice received and collected by the microphone function 22 matches a specific voice that has been set in advance. If the voice generated at the care site matches this specific voice, it is determined that a problem has occurred. Specifically, this specific voice is stored in a database in advance, and is compared with the voice generated at the care site to constantly determine whether or not the specific voice has been generated.

There are no limitations on the specific configuration of the voice determination function 25. For example, a program that performs the above-mentioned determination can be created and installed in a computer C, such as a personal computer, tablet computer, or server. AI (artificial intelligence) may also be used to determine whether or not a particular voice matches. By having a computer learn (deep learning) particular voices and respond to all volumes, tones, dialects, intonations, etc., it is possible to accurately determine whether or not a voice that is being produced corresponds to a particular voice.

Regarding the network: The network N is a communication means used when the photographing device 2 and the heart rate measuring device 3 send and receive information, when the functions included in the photographing device 2 are separated into two or more devices (separate type) and information is sent and received between each device having these functions, etc.
Specifically, communication infrastructure such as a wired or wireless LAN (Local Area Network) or WAN (Wide Area Network), as well as telephone lines and mobile phone lines, can be used.

It is assumed that in nursing care facilities, a wired or wireless LAN is often used as the network N used in the present invention.
However, in order to introduce a new wired LAN to a nursing facility that does not have or does not have sufficient LAN equipment, it is necessary to lay cables throughout each location and room, which results in a high introduction cost. There is also the problem that it is not suitable for use with mobile information terminals such as smartphones and tablet terminals. Wireless LAN is suitable for use with mobile information terminals, but in nursing facilities, concrete walls and fireproof doors are obstacles to radio wave propagation, so repeaters must be installed in various locations, which also results in a high introduction cost. In nursing facilities, cables for watching television are often installed in each room, and although there is a method of using these cables as LAN cables, converters and the like are required, so it is still difficult to keep costs down.

In such a case, it is preferable to use a mobile phone line as the network N. Recently, the introduction of the fifth generation mobile communication system (commonly known as "5G") has started, and it is considered that the communication capacity of mobile phone lines is sufficient even when transmitting video data. If a mobile phone line is used as the network N, the video recording system of the present invention can be used even in places where there is no network environment, such as at the site of a home care visit.

As described above, examples of the network N used in the present invention include mobile phone lines such as 5G, and it is preferable to use local 5G technology.
Local 5G is a 5G network that can be used individually by local companies and local governments that are not telecommunications carriers, depending on the needs of the region or industry. In contrast to the uniform 5G communication services that telecommunications carriers deploy nationwide, local 5G allows regions and companies to build, operate, and use their own 5G networks in specific areas, such as within their own buildings or premises. By using this technology, a local 5G network can be formed, for example, within a single nursing facility or a specific area that includes multiple nursing facilities, and when a problem occurs, information can be shared between teams that have established a cooperative system, whether within the same facility or between different facilities, and a team of multiple people can respond to problems that occur, especially at night when there is a shortage of manpower.

Regarding Specific Voices Next, a means for determining the occurrence of specific voices according to the present invention will be described.
In the present invention, the occurrence of trouble in a care setting refers to verbal abuse, physical abuse, power harassment, sexual harassment, and the like that occurs between a caregiver and a care recipient.

The video recording system 1 used in nursing care sites uses the occurrence of a specific sound as a determining factor for the occurrence of a problem.
The specific voice refers to a voice that is emitted by a human being and that may be emitted when a problem occurs in a care facility.
Specifically, this includes verbal abuse, mental violence, power harassment, or sexual harassment uttered by the person receiving care, their family members or other related parties, or the caregiver.

Prohibited Words The present invention is characterized in that it focuses on "prohibited words" in nursing care sites as the above-mentioned specific sounds.
These prohibited terms are terms that have been defined by each care facility or care organization as terms that must not be uttered in the care setting, and are terms that each facility or organization has defined independently.
In other words, prohibited words are words that caregivers should not use when speaking to those they are caring for, in order to protect the human rights and dignity of those they are caring for. These prohibited words are originally rules for caregivers, but even if the care recipient or their family uses prohibited words against the caregiver, it may be considered power harassment or sexual harassment, and some kind of trouble may have occurred.

Examples of forbidden words include calling someone by their first name, nicknames, or "you," as well as commanding language such as "Do this!", "Hurry up!", and "Stop it!", as well as negative words such as "gross," "dirty," and "in the way." In addition, words that express problems specific to the person being cared for can also be set as forbidden words, such as the name of the illness the person being cared for is suffering from (especially if the person being cared for has not been informed of the name of their illness), or political or religious matters on which opinions are divided depending on the thoughts and beliefs of the person being cared for.

In addition, regardless of the content of the words, voices that are louder than necessary, shouting or threatening voices, voices that include sighs, etc. are also considered inappropriate in nursing care settings. Therefore, such tones of voice may also be set as specific sounds, regardless of whether they correspond to prohibited words or not.

In the video recording system 1 according to the present invention, the prohibited words defined by each care facility or each care organization are compiled into a database, and the voice determination function 25 compares and determines the prohibited words with voices uttered at the care site.
It is preferable to train a computer to learn these prohibited words and perform judgment using AI. Specifically, the computer is trained to handle each prohibited word in various volumes, tones, dialects, intonations, etc., and it is possible to accurately judge whether a voice uttered at a nursing care site corresponds to any of the prohibited words.

The content of these prohibited words can be set arbitrarily to suit the care facility or the like in which the video recording system 1 is installed. In addition, it is preferable that the prohibited words set here are classified into several levels in terms of content, and that it is possible to arbitrarily set which level of prohibited words is detected and the video data is saved and a notification is sent to the administrator or the like.

In addition, by detecting sounds of beatings and falls in addition to the above-mentioned prohibited words and treating these as specific sounds, it is possible to more reliably detect the occurrence of trouble, etc. Specifically, by detecting sounds of beatings, it is possible to detect a high possibility that some kind of trouble (violence, etc.) has occurred between the care recipient and the caregiver, and by detecting sounds of falls, it is possible to detect a high possibility that a health problem (fall or fainting) has occurred, in particular, for the care recipient.

Specific desire terms It is preferable to employ specific desire terms together with the above-mentioned prohibited terms as elements (specific sounds) for detecting the occurrence of trouble, etc. The specific desire terms are explained below.

Specific desire terms are words that the care recipient utters towards the caregiver, and are verbal abuse that is a reflection of their own desires and wants. These specific desire terms can sometimes be verbal abuse, and the care recipient may not be able to express their own desires and wants well, which can result in verbal abuse, and this is one of the causes of trouble in the care setting.

Specifically, the following applies:
Many of the care recipients are elderly, and their memory and judgment are impaired, and many of them suffer from dementia. The stress of being unable to control their mind and body can lead to a variety of symptoms, such as abusive language and violence, wandering around without permission, and delusions of theft, such as claiming that their wallet or other items have been stolen, which are not true. These symptoms are called BPSD (Behavioral and Psychological Symptoms of Dementia), and are said to be behavioral and psychological symptoms of dementia. BPSD can sometimes manifest as abusive language, which, when directed at caregivers, often causes anger and stress in the caregiver. In particular, inexperienced caregivers may not understand that abusive language by care recipients, i.e., the use of specific desire terms, is a type of BPSD and is an unavoidable symptom, and this can lead to problems.

In the field of care, those receiving care are considered to be weak, and abusive language by those receiving care is considered to be an expression of their own needs and desires. Therefore, this abusive language by those receiving care can be defined as specific desire terms, and since there is a risk of trouble occurring when these specific desire terms are uttered, it is preferable to detect them as specific sounds.

If the system is configured to record video data when specific desire terms are generated, it can be used as verification material when some kind of trouble occurs, and can also be used as educational material for inexperienced caregivers. Furthermore, if the system is configured to immediately notify the caregiver when the generation of a specific desire term is detected, the caregiver can be made aware that it is a symptom of BPSD, reducing anger and stress, and ultimately preventing or suppressing the escalation of trouble.

The following words can be cited as specific desire terms:
Insulting words used against caregivers include calling them "stupid,""idiot,""slow,""useless," etc. Words that constitute power harassment using a superior position include "take responsibility,""don'tdisobey,""quit," and "you're useless," while words that constitute sexual harassment include "let me touch you" and "ugly."

The purpose of using the occurrence of this specific desire term as a specific sound to detect the occurrence of trouble, etc. is to protect caregivers from harassment by the care recipients and their families, etc.
Conventional surveillance cameras and surveillance systems in nursing care facilities have been introduced with the idea of protecting or watching over the care recipients by monitoring for abusive language or violence from caregivers toward the care recipients.

On the other hand, in today's nursing care workplace, there are many cases of harassment (such as power harassment consisting of abusive language and sexual harassment consisting of sexual behavior) by those receiving care and their families, which causes mental stress for caregivers. This stress can lead to a loss of motivation and result in many caregivers leaving the company, and the intense stress can lead to aggressive feelings, which can manifest in the form of abusive language or violence against the people receiving care.

Therefore, the idea of protecting and watching over caregivers is necessary, which will help to resolve the issue of caregivers leaving their jobs and is also expected to have the effect of preventing and reducing problems such as verbal abuse and violence against those being cared for.
The present invention is novel and original in that it is inspired by the idea of protecting or watching over caregivers in any care setting, and aims to ensure the safety of caregivers working in care settings, help build a working environment where they can continue to work with peace of mind, and ultimately lead to the securing and retention of human resources. This feature and purpose is expressed in the fact that specific desire terms are sensed as factors that predict the occurrence of trouble.

As described above, the specific desire term is a word uttered by a caregiver. Therefore, in determining whether or not a voice is a specific desire term, if it is possible to determine whether or not the voice is uttered by a caregiver, the accuracy of the determination can be increased.
Whether or not the voice being uttered is made by the care recipient can be determined by registering the voiceprint of the care recipient in advance in the determination device.

It is well known that a voiceprint is a sonagram that is the result of frequency analysis of a voice, and is known to differ from person to person. By registering the voiceprint of the care recipient in advance and equipping the system with a function to analyze the voice uttered at the care site and convert it into a voiceprint, it is possible to reliably determine the occurrence of specific desire terms.
In addition to specific desire words, voiceprints can also be used to determine the above-mentioned prohibited words. That is, the voiceprints of the caregivers in charge are also registered in advance, and by comparing them with the voiceprints of the voices uttered at the care site, the reliability of the determination of prohibited words can be increased.

Speech lock In addition to the prohibited words and specific desire words mentioned above, speech lock, which is a behavior that is considered inappropriate in the nursing care field, may also be used as a specific sound to detect the occurrence of trouble, etc.
Speech lock refers to verbal restraint of physical or mental behavior, and is a term used by caregivers to restrain the care recipient. It is widely known that physical restraint of the care recipient is not desirable, but speech lock, which verbally restrains the care recipient's behavior, has also been recognized in recent years as a term that should not be used in the field of care.

Examples of speech locking words include words that inhibit or restrict the behavior of the care recipient, such as "Don't move,""Don't stand, just sit down," etc. Although such words are sometimes uttered by caregivers without any malicious intent to ensure the safety of the care recipient, they may make the care recipient feel uncomfortable.
To avoid speech lock, it is preferable to replace "Don't move" with "Could you please wait a moment?" and "Don't stand up, stay sitting down" with "It's dangerous if you do this, so could you please stay sitting down?" etc.

Use of AI deep learning As mentioned above, it is preferable to use prohibited words, specific desire words, or speech locks as elements for detecting the occurrence of trouble, etc.

However, it is not easy to determine whether spoken words fall under these terms. There are differences in the use of words and intonation depending on the speaker, and when dialects are also taken into consideration, there is a certain degree of variability in determining whether a word falls under prohibited terms. In order to take this variability into account and accurately determine whether a word falls under prohibited terms, it is preferable to use AI deep learning technology.

By organizing and accumulating information from actual cases in care settings, a computer can be trained to improve the accuracy of determining whether or not a word is a prohibited word. The contents that the computer can be trained on could include, for example, words actually spoken in care settings and the results of determining whether or not those words are a prohibited word, the circumstances in which the prohibited word was spoken, and local dialects. In addition, as mentioned above, if the voiceprints of the care recipient and the caregiver are registered in the computer, it can be determined whether the speaker is a care recipient, a caregiver, or a third party, which allows for even more accurate determination of whether or not a word is a prohibited word.

The specific content and standards of prohibited words, specific desire words, or speech locks may be set arbitrarily by each nursing care facility, nursing care association, or other organization.
It is preferable to operate the video recording system according to the present invention after reflecting any setting.

Use of a Glasses-Type Wearable Device Next, application examples of the video recording system 1 will be described.
All or part of the functions of the video recording system 1 can be installed in a glasses-type wearable device G. As shown in Fig. 6, if a camera function G1 and a microphone function G2 are installed in the glasses-type wearable device G, it can be used as an image capturing device 2. By having a caregiver Z wear the glasses-type wearable device G, the line of sight and surrounding images and sounds of the caregiver Z can be captured and received, and there is an advantage that the video recording system 1 according to the present invention can be used even in care settings where fixed cameras are not installed, such as in home care or nursing care settings.

This eyeglass-type wearable device G can be equipped with all or some of the functions such as a camera function G1, a microphone function G2, a recording function G3, a communication function G4, a determination function G5, a display function G6, and/or an intercom function G7. It is even more preferable if the function of the heart rate measuring device 3 can be equipped.
The communication function G4 used here is a function for transmitting and receiving information using any wireless network (e.g., Bluetooth (registered trademark)) with a wearable terminal W with a heart rate measuring function that is separately worn by the caregiver Z, who is the subject M. If the subject M's heart rate is constantly transmitted from the wearable terminal W with a heart rate measuring function worn by the subject M to a glasses-type wearable device G also worn by the subject M, when the judgment function G5 of the glasses-type wearable device G judges that there is a change in the heart rate that has been preset, this can be detected as the occurrence of a problem, and the video data before and after the occurrence of the problem can be protected.

The communication function G4 is also used to transfer video data captured by the camera function G1 of the glasses-type wearable device G to other devices, and to notify pre-registered people who need to be notified if a problem is detected.

The judgment function G5 is a function that constantly monitors the heart rate transmitted from the wearable device W with a heart rate measuring function worn by the subject M, and judges whether or not a preset change in the heart rate occurs. It is also a function that judges whether or not a specific voice occurs. In other words, the occurrence of a problem is detected by this judgment function G5.
There is no limitation on the specific configuration of the glasses-type wearable device G used in the present invention. Any known and publicly used technology that is known for glasses-type wearable devices can be used without any particular limitation.

Next, the display function G6 and the intercom function G7 will be described.
These functions are used when the caregiver Z, who is the person M being watched over, contacts or exchanges information with caregivers in other locations. The display function G6 and the intercom function G7 are particularly useful for the caregiver Z who is providing care alone.
When providing home care or working night shifts, caregiver Z is often forced to provide one-on-one care with care recipient Y, and there are often no other caregivers nearby. In such an environment, for example, inexperienced caregivers often have difficulty dealing with unexpected situations. When such an incident occurs, if the display function G6 and intercom function G7 can be used to exchange information with caregivers in other locations, appropriate support and advice can be received.

As mentioned above, the glasses-type wearable device G has a communication function G4, and can communicate with other computers or smartphones that have communication functions via a network. This allows not only voice calls, but also the sending and receiving of video and documents, so that, for example, it is possible to send a video of the situation at a home care facility and then receive advice or points out problems from caregivers in other locations.

With the display function G6, it is possible to view video data and materials sent from caregivers in other locations. For example, if a video lecture on a care method appropriate to the situation is sent and the caregiver can provide care while viewing this, the caregiver can respond appropriately even if the caregiver is unfamiliar with the task or response.
In addition, when a problem occurs in one of the caregivers working as a group team in the same care facility or in a related care facility, and this is detected by a change in heart rate or a specific sound, a configuration may be adopted in which the image of the problem occurring is displayed on the display of the other caregivers in the same group team. This allows the other caregivers in the same group team to immediately grasp the situation of the problem, and to rush over to help if necessary, or to give advice using the communication function G4.
It is preferable that groups and teams of the same care facility or affiliated care facilities be able to communicate at all times via the local 5G communication network described above.

An intercom is a type of on-premise telephone used in operations that require simultaneous command to moving staff, and is sometimes called a mutual communication on-premise telephone. The intercom function G7 used in the present invention has the same functions as this intercom, and is a communication function that is not limited to a communication range within the premises, but can be used over a wide area via a network such as a mobile phone line. In other words, it has a communication function and a speech function (having at least a microphone function and a speaker function).
By using this intercom function G7, if a problem occurs with one of the caregivers working as a group team in the same care facility or affiliated care facilities, the other caregivers in the same group team can all communicate by phone at once. This allows the other caregivers in the same group team to immediately understand the situation of the problem and, if necessary, can rush to help or use the communication function G4 to give advice.

This intercom function G7 is preferably provided in the temple portion of the glasses-type wearable device G, as shown in FIG.
The temple portion is a rod-shaped portion for hanging the eyeglass-type wearable device G on the wearer's ear. It is preferable that the microphone portion be configured to be able to be brought closer to the wearer's mouth by moving a part of the temple portion downward.
When the intercom function G7 is not in use, it can be stored in the temple section and does not interfere with the movement during caregiving, and when the intercom function is in use, the microphone section can be brought close to the mouth to make it easier to pick up the contents of the wearer's speech. Note that the speaker section is preferably provided in a position on the temple section close to the wearer's ear.

Another function that may be installed in the glasses-type wearable device G is a function for maintaining an appropriate distance between the caregiver Z and the person being cared for Y.
One of the causes of trouble between caregiver Z and care recipient Y is when the physical distance between them is too close or too far when providing care. If the distance between the two is too close, care recipient Y (especially those with dementia) may suddenly become angry due to surprise or discomfort, and as a result may verbally abuse or become violent towards caregiver Z. If the distance between the two is too far, care recipient Y may feel uncomfortable that he or she is not being cared for carefully, which may also lead to verbal abuse or violence. To eliminate such problems, caregiver Z needs to maintain an appropriate distance from care recipient Y.
Therefore, it is preferable that the glasses-type wearable device G is equipped with a function for measuring the distance between the wearer, the caregiver Z, and the person in need of care Y, and notifying the caregiver Z by means of an alarm or other means if the distance is outside a preset appropriate range. By equipping the device with this function, it is possible to notify the caregiver Z if the caregiver Z unconsciously gets too close to the person in need of care Y, helping both parties to maintain an appropriate distance.

Use as a remote medical tool As mentioned above, care recipient Y often suffers from dementia. On the other hand, many people are suspected of having dementia but have not been diagnosed by a doctor. Only a doctor can diagnose whether or not someone has dementia, but going to a doctor just to receive this diagnosis is not easy due to issues such as a shortage of caregivers.

Therefore, by transmitting the video data stored by the video recording system 1 to a doctor and having the doctor review it, it is possible to diagnose whether the care recipient Y has dementia as part of remote medical treatment. In particular, video data stored upon detecting the occurrence of a problem or the like often contains behavior specific to dementia, making it suitable for diagnosing dementia.
It is also important to note that the precautions to take in daily life and treatment methods vary depending on the type of dementia that is diagnosed. For example, a characteristic of Alzheimer's is "spatial agnosia," where the brain cannot recognize what the eyes can see. If caregivers are aware of this, they can provide higher quality care and may be able to reduce verbal and physical abuse by the dementia care recipient.
By creating a database of protected footage during incidents and collaborating with dementia specialists and national-level dementia research institutions, it will be possible to effectively utilize this information in formulating more detailed dementia diagnostic criteria and developing dementia treatment drugs.

Furthermore, the video recording system 1 using the above-mentioned glasses-type wearable device G can capture the condition of the cared for person Y from a close distance, and by transmitting this video data along with vital sign data of the cared for person Y, more information can be sent to the doctor, making it ideal for remote medical treatment.
Furthermore, the doctor can use the intercom function G7 etc. to instruct the caregiver Z on the areas that need to be photographed, making it a useful tool for remote medical treatment.

Use as a means to prevent aspiration As described above, by installing the video recording system 1 in a glasses-type wearable device G, the appearance of the cared for person Y can be captured from the perspective of the caregiver Z, which can be used for various purposes.

One example is the function of preventing aspiration when assisting with eating in a room or dining room.
Care recipient Y often has difficulty swallowing food and drink that he or she puts in the mouth and sends it to the stomach due to organic or functional factors such as aging, which is called dysphagia. This dysphagia can often lead to life-threatening situations such as choking on food stuck in the throat or aspiration pneumonia caused by aspiration. Caregiver Z must be extremely careful when assisting care recipient Y with meals to prevent aspiration, etc.
According to the "Monthly Vital Statistics Annual Total (approximate figures)" published by the Ministry of Health, Labor and Welfare, the number of deaths caused by aspiration pneumonia was 38,462 in 2018. Of pneumonia patients aged 70 or older, more than 70% had aspiration pneumonia, indicating that it is a common disease, especially among the elderly.
The number of deaths from aspiration pneumonia is expected to increase in the future, and is predicted to reach approximately 70,000 men and 50,000 women, totaling approximately 120,000, by 2030.
These statistical data and predictions also show the importance of measures to prevent aspiration in nursing care settings.

However, it is particularly difficult for inexperienced caregiver Z to properly assist care recipient Y with meals while taking into account his or her swallowing function, physical condition, etc.
If the video recording system 1 can be used to assist with appropriate meal assistance, it would be significant in avoiding problems such as aspiration.

In the present invention, we focus on the posture of the care recipient Y when eating as a means of preventing or suppressing the occurrence of aspiration. That is, as shown in Figure 7(a), if the care recipient Y eats with his/her back straight and his/her pelvis upright, it is known that the risk of aspiration is small. On the other hand, as shown in Figure 7(b), it is known that the risk of aspiration is high when the care recipient Y eats with his/her back hunched and his/her pelvis not upright. In the present invention, we focus on this posture when eating and adopt a means of preventing or suppressing aspiration.

When caregiver Z assists care recipient Y with eating by wearing glasses-type wearable device G with a camera function G1, the caregiver Z can capture the posture of the care recipient Y when eating. This captured video data is analyzed in real time, and if it is detected that the care recipient Y's back is not straight or that the pelvis is not upright, the caregiver Z is notified of this. Upon receiving this notification, caregiver Z can encourage the care recipient Z to correct their posture, so that they can eat in the correct posture.

In the above-mentioned video data analysis, specifically, it is preferable to grasp the position of the head of the care recipient Y and judge whether the care recipient Y is eating in a correct posture. As shown in Fig. 7(a), if the head of the care recipient Y is located directly above the torso, it can be determined that the posture is correct, and as shown in Fig. 7(b), if the head of the care recipient Y protrudes in another direction, such as forward, from directly above the torso, it can be determined that the posture is not correct.
In this way, if the risk of aspiration, etc. can be determined based on the position of the head of the care recipient Y, there is no need to use advanced image analysis, etc., and a video recording system 1 with aspiration prevention function can be provided at low cost.

* Linkage with other sensors By linking with other sensors installed at the care site, the video recording system 1 of the present invention can quickly detect changes in the physical condition or health problems of the person being cared for, and take more appropriate measures.
For example, if information obtained from infrared sensors, mat sensors, microwave sensors, vital data measuring devices, nurse call systems, etc. that may be installed in the room R of the cared for person Y can be added to the information obtained from the video recording system 1, it will be possible to reliably detect any potential problems that may occur in the care setting.

By utilizing the above-mentioned application example of the glasses-type wearable device G, information obtained from other sensors, etc. in addition to the video recording system 1, can be notified via the network N, and the caregiver Z who is wearing it can be quickly notified of the occurrence of a problem, etc. The caregiver Z can visually check the notified information displayed on the glasses-type wearable device G. In this way, information can be received and confirmed without using hands, which is particularly convenient when caring for other people.

Collection of Research Materials The video recording system 1 according to the present invention is also useful as a means for collecting research materials relating to nursing care.
By using the video recording system 1, each time a problem occurs in the nursing care site, video before and after the problem occurs is saved, and this video data can be accumulated. Using this video data, it is possible to understand the causes of problems and situations in which problems are likely to occur, to study tendencies in how to handle problems, solutions to problems, and measures to avoid problems.

Currently, the solutions and avoidance measures for problems in the field of nursing care largely depend on the know-how of each nursing facility and caregiver, and this know-how is not shared among nursing care facilities nationwide. As a result, there are differences in the level of understanding and ability to solve and avoid problems between nursing facilities and caregivers.
By utilizing the video data accumulated by the video recording system 1 according to the present invention, solutions and avoidance measures for problems can be researched and if this information is made public to care facilities across the country, it will be possible to reduce problems in care facilities nationwide.

Use as a care record The video data stored by the video recording system 1 can be used as a care record.
At the end of the day's shift, the video data can be reviewed and a care record can be created, ensuring accurate records. This reduces the amount of work required for handing over tasks. In addition, the video data itself can be saved as a care record, and the video can be reviewed and used to verify any trouble or illness that occurs later.

* Use as a training tool for new caregivers, etc. The video data saved by the video recording system 1 can be made visible and used as teaching materials for training and instruction for caregivers, and the information can be shared and used.
The saved video data is a video recording of problems that occur in the nursing care field, and can be used as teaching material, for example, to show these cases to new or inexperienced caregivers and instruct them on how to deal with them.

Two or more of the functions, use examples, and application examples described in this specification may be combined and used without any special restrictions.

1 Video recording system 2 Shooting device 21 Camera function 22 Microphone function 23 Recording function 24 Communication function 25 Voice determination function 3 Heart rate measuring device

C Computer S Portable information terminal G Glasses-type wearable device G1 Camera function G2 Microphone function G3 Recording function G4 Communication function G5 Judgment function (heart rate, voice)
G6 Display function G7 Intercom function W Wearable terminal with heart rate measurement function N Network (wired/wireless)

M: Person to be watched over Y: Person receiving care Z: Caregiver R: Room

Claims (12)

A video recording system for use in a nursing care facility,
In a video recording system for monitoring a subject, a cyclical recording system is adopted in which the captured video is constantly recorded and new video data is sequentially overwritten onto old video data.
When a trouble is detected, video data of a predetermined time before and after the trouble is selected and protected from being deleted by overwriting,
A video recording system, wherein the means for detecting the occurrence of a problem is a change in the subject's heart rate. The video recording system of claim 1, characterized in that the subject's heart rate is constantly measured by a wearable device with a heart rate measuring function worn by the subject, and this information is transmitted to the video recording system. The person being watched over is a caregiver,
3. The video recording system according to claim 1, further comprising a configuration for detecting and recording occurrence of a trouble, for the purpose of protecting a caregiver. The subject's heart rate is detected when a sudden increase or decrease in heart rate is measured,
4. The video recording system according to claim 1, wherein the system is configured to detect when a preset rate of increase or decrease is exceeded based on the subject's normal heart rate. 5. The video recording system according to claim 1, wherein the pulse of the subject is sensed when a state of tachycardia or bradycardia is measured. The video recording system of any one of claims 1 to 5 , characterized in that the subject's cardiac condition is constantly monitored by a wearable terminal with an electrocardiogram function, and any symptoms of atrial fibrillation are detected. The means for detecting the occurrence of a problem is a change in the subject's heart rate and blood pressure,
A sudden increase or decrease in the subject's blood pressure is detected,
7. The video recording system according to claim 1, wherein the system is configured to detect when a preset rate of increase or decrease is exceeded based on the subject's normal blood pressure. A video recording system for use in a nursing care facility,
The occurrence of a problem is detected when a specific sound is detected.
8. The video recording system according to claim 1, wherein the specific sound is a prohibited word that is specified as a word that should not be uttered in a nursing care site. 9. The video recording system according to claim 8 , wherein the specific voice is a specific desire term defined in a care setting as a term by which a care recipient conveys his or her own desires or wants. The person being watched over is a caregiver,
10. The video recording system according to claim 8, further comprising a configuration for detecting and recording any harassment by a care recipient, thereby protecting the caregiver. The video is captured by a glasses-type wearable device equipped with a camera function to capture video and a microphone function to receive and collect surrounding sounds.
The video recording system of any one of claims 8 to 10, characterized in that the glasses- type wearable device is connected via a network to a computer having either or both of a recording function for recording video and sound, or a judgment function for determining whether a sound recorded in a video is a specific sound. The glasses-type wearable device has an intercom function that enables voice communication via a network and a display function that displays video received via the network,
The video recording system described in claim 11 , characterized in that it is configured to enable the transmission of information consisting of audio and images between a caregiver wearing the glasses-type wearable device and other persons connected via a network.