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WO2018182043A1 - Dispositif de détection de mastication ou de déglutition - Google Patents

Dispositif de détection de mastication ou de déglutition Download PDF

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Publication number
WO2018182043A1
WO2018182043A1 PCT/JP2018/014112 JP2018014112W WO2018182043A1 WO 2018182043 A1 WO2018182043 A1 WO 2018182043A1 JP 2018014112 W JP2018014112 W JP 2018014112W WO 2018182043 A1 WO2018182043 A1 WO 2018182043A1
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WO
WIPO (PCT)
Prior art keywords
mastication
unit
swallowing
displacement sensor
detection
Prior art date
Application number
PCT/JP2018/014112
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English (en)
Japanese (ja)
Inventor
惠一 石上
こう滋 大津
典昭 清水
明夫 小林
Original Assignee
コンピュータ・ハイテック株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by コンピュータ・ハイテック株式会社 filed Critical コンピュータ・ハイテック株式会社
Priority to JP2019509438A priority Critical patent/JP7032765B2/ja
Publication of WO2018182043A1 publication Critical patent/WO2018182043A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb

Definitions

  • the present invention relates to a technique for detecting mastication or swallowing.
  • Recent research has revealed that mastication has many positive effects such as promoting brain activation. If there is a device for detecting mastication, the number of mastications can be increased, and the health of the person's mind and body is promoted.
  • swallowing is a physical function highly related to mastication. Although the ability of swallowing declines due to aging, etc., conscious swallowing on a daily basis suppresses the decline in ability. Therefore, as with mastication, if there is a device for detecting swallowing, conscious swallowing can be promoted, and health of the person's mind and body is promoted.
  • Patent Document 1 describes a mastication frequency recording device that attaches a tension detection sensor to a person's cheek, counts the number of mastications based on the detection result of the tension detection sensor, and records and displays the counted number.
  • Patent Document 2 describes a swallowing function evaluation training device that measures the number of times that the intensity of an electrical signal emitted from a piezo film exceeds a predetermined threshold value by attaching a piezo film to a human throat.
  • the waveform of the signal output by the displacement sensor affixed to the cheek or the like with one mastication may include multiple undulations. Therefore, if mastication is detected simply when the amplitude of the waveform indicated by the output signal of the displacement sensor exceeds the upper threshold or the amplitude falls below the lower threshold, mastication that is not actually performed is erroneously detected. May end up. The same applies to swallowing.
  • an object of the present invention is to provide means for correctly detecting mastication or swallowing.
  • the present invention smoothes the waveform indicated by the output signal of the displacement sensor, which obtains the output signal of the displacement sensor attached to a predetermined part of the human head or neck, and the output signal of the displacement sensor.
  • a detection device including a smoothing unit to be converted and a detection unit that detects mastication or swallowing based on the waveform smoothed by the smoothing unit.
  • the detection device it is possible to detect mastication or swallowing with higher accuracy than in the case based on the waveform indicated by the output signal of the unsmoothed displacement sensor.
  • a configuration including a count unit that counts the number of chewing or swallowing detected by the detection unit may be employed as the second aspect.
  • the number of chewing or swallowing can be facilitated.
  • a configuration in which the smoothing unit smoothes a waveform indicated by an output signal of the displacement sensor by a filter that attenuates a high frequency component is a third aspect. It may be adopted.
  • the waveform indicated by the output signal of the displacement sensor is smoothed by software processing.
  • the detection unit determines a threshold based on an output signal of a specified period of the displacement sensor and is smoothed by the smoothing unit.
  • a configuration in which mastication or swallowing is detected based on the comparison result between the waveform and the threshold value may be employed as the fourth aspect.
  • mastication or swallowing is detected even if the amplitude of the output signal of the displacement sensor varies from person to person.
  • the configuration in which the detection unit detects mastication or swallowing during the specified period in addition to the period after the specified period is the fifth configuration. You may employ
  • mastication or swallowing performed during the period for determining the threshold is also detected.
  • the acquisition unit acquires an output signal of a microphone that picks up a voice uttered by the person, and the detection unit outputs an output signal of the microphone.
  • a configuration in which the person's utterance period is specified using, and mastication or swallowing is not detected during the utterance period may be adopted as the sixth aspect.
  • the detection device avoids the inconvenience of erroneously detecting mastication or swallowing during utterance.
  • a configuration in which the microphone is provided and the microphone is a bone conduction microphone may be adopted as the seventh aspect.
  • the utterance period is correctly specified even in a noisy environment.
  • the detection apparatus includes signal separation means for separating a sound signal included in the output signal of the displacement sensor from the output signal, and the detection unit includes the signal separation.
  • a configuration may be adopted as an eighth aspect in which the utterance period of the person is specified using the sound signal separated by the means, and chewing or swallowing is not detected during the utterance period.
  • the detection device avoids the inconvenience of erroneously detecting mastication or swallowing during utterance.
  • a configuration including the displacement sensor may be adopted as the ninth aspect.
  • the user does not need to separately prepare a displacement sensor.
  • a configuration including a communication unit that communicates with the server device via a network may be adopted as the tenth aspect.
  • an administrator or the like can remotely confirm the operation status of the detection device or mastication or swallowing detected by the detection device.
  • the acquisition unit is attached to the output signal of the first displacement sensor attached to a predetermined part of the human head and the predetermined part of the human neck.
  • the smoothing unit obtains an output signal of the second displacement sensor, and the smoothing unit cuts off a waveform indicated by the output signal of the first displacement sensor and a waveform indicated by the output signal of the second displacement sensor.
  • the detection unit detects mastication based on the waveform indicated by the output signal of the first displacement sensor smoothed by the smoothing unit, and smoothed by the smoothing unit.
  • the detecting unit identifies a period during which swallowing is performed by the person using the output signal of the second displacement sensor, Swallowing Does not detect the chewing period are configuration that may be employed as the eleventh aspect.
  • mastication and swallowing performed as a series of operations can be detected in parallel.
  • the detection device includes a count unit that counts the number of times each of chewing and swallowing detected by the detection unit, and the counting unit is after the period during which the swallowing is performed.
  • a configuration in which the mastication detected by the detection unit is counted again from 1 may be adopted as the twelfth aspect.
  • the detection device According to the detection device according to the twelfth aspect, it is possible to know the state of mastication performed for individual swallowing.
  • the present invention provides a process for acquiring an output signal of a displacement sensor attached to a predetermined part of a human head or neck in a computer, and a process for smoothing a waveform indicated by the output signal of the displacement sensor.
  • a program for executing a process of detecting mastication or swallowing based on the waveform smoothed by the smoothing process is provided as a thirteenth aspect.
  • mastication or swallowing is detected with high accuracy by the computer.
  • mastication or swallowing is correctly detected.
  • the external view of the mastication detection apparatus which concerns on 1st Embodiment The figure which showed the use condition of the mastication detection apparatus which concerns on 1st Embodiment.
  • the figure which showed the output signal of the displacement sensor which the mastication detection apparatus which concerns on 1st Embodiment acquires.
  • the figure which showed the output signal of the displacement sensor after the mastication detection apparatus which concerns on 1st Embodiment performed smoothing.
  • the figure for demonstrating the process in which the mastication detection apparatus which concerns on 1st Embodiment detects mastication The figure which illustrated the screen which the mastication detection apparatus which concerns on 1st Embodiment displays during the count of the number of mastication.
  • FIG. 1 is an external view of the mastication detection device 1.
  • the mastication detection device 1 includes a main body 11, a displacement sensor 12 wired to the main body 11, and a microphone 13 wired to the main body 11.
  • the main body 11 includes a speaker 111, a display 112, a button group 113, and a control unit 114.
  • the speaker 111 generates a guide sound to be described later.
  • the display 112 is a liquid crystal display, for example, and displays various information such as the counted number of mastications.
  • the button group 113 has a plurality of buttons and accepts user operations.
  • FIG. 1 illustrates the case where the button group 113 has a total of five buttons, a “SELECT” button, an “UP” button, a “DOWN” button, a “START” button, and a “STOP” button.
  • the number and arrangement of buttons may be arbitrarily changed.
  • the control unit 114 is, for example, a computer including a memory, a processor that performs data processing according to a program stored in the memory, and an input / output interface that inputs and outputs data between external devices.
  • the control unit 114 may be configured as a dedicated device having an integrated circuit such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field-Programmable Gate Array).
  • the displacement sensor 12 is affixed to a predetermined part of the user's head and outputs an amplitude signal corresponding to a displacement (amount of distortion) due to a change in shape that occurs at the predetermined position when the user chews.
  • An appropriate part as the predetermined part to which the displacement sensor 12 is attached is, for example, in the vicinity of the chin joint of the cheek, but may be any part of the head as long as the shape is changed by mastication.
  • the microphone 13 picks up the voice uttered by the user and outputs a signal indicating the voice of the picked up user.
  • the microphone 13 is a bone conduction microphone, for example, and is attached to a predetermined part of the user's head, and picks up the vibration of the voice emitted by the user and transmitted to the face surface through the skull.
  • An appropriate part as the predetermined part to which the microphone 13 is attached is, for example, near the temple. However, any part may be used as long as the part vibrates due to the user's voice.
  • FIG. 2 is a diagram showing a state in which the displacement sensor 12 and the microphone 13 are attached to the user's head.
  • the displacement sensor 12 and the microphone 13 are attached to the user's face with, for example, a medical tape.
  • the displacement sensor 12 When the user performs mastication with the displacement sensor 12 attached to the head, the displacement sensor 12 outputs a signal indicating a change in shape that occurs on the surface of the head as a result of mastication.
  • the signal output from the displacement sensor 12 indicates not only mastication but also a change in shape that occurs on the surface of the head while the user speaks. Therefore, the mastication detection device 1 does not detect mastication during a period in which a signal indicating sound is output from the microphone 13 (hereinafter referred to as “speech period”). The specification of the utterance period will be described later.
  • FIG. 3 is a diagram showing a functional configuration of the control unit 114.
  • the control unit 114 is a computer
  • the acquisition unit 1141 is mainly realized by an input / output interface
  • the storage unit 1146 is mainly realized by a memory
  • the other components are mainly stored in a memory. It is realized by data processing by a processor according to a stored program.
  • the acquisition unit 1141 acquires a signal from an external device.
  • the acquisition unit 1141 acquires a displacement signal acquisition unit 11411 that acquires a signal indicating displacement output from the displacement sensor 12 (hereinafter referred to as “displacement signal”), and a signal that indicates sound output from the microphone 13 (hereinafter referred to as “sound”).
  • the smoothing unit 1142 smoothes the waveform indicated by the displacement signal (output signal of the displacement sensor 12) acquired by the displacement signal acquisition unit 11411 substantially in real time.
  • the smoothing unit 1142 has a filter, and smoothes the waveform by attenuating a high frequency component of the waveform indicated by the displacement signal by the filter.
  • the sound filter unit 1143 performs a filter process for passing the frequency component of the human voice and attenuating other frequency components with respect to the sound signal (output signal of the microphone 13) acquired by the sound signal acquiring unit 11412. By this filtering process, the audio filter unit 1143 generates a sound signal containing a lot of voice components uttered by the user.
  • the detection / counting unit 1144 includes a detection unit 11441 that detects mastication, and a count unit 11442 that counts the number of detected mastications.
  • the detection unit 11441 detects the peak and bottom of the waveform indicated by the displacement signal smoothed by the smoothing unit 1142. More specifically, the detection unit 11441 has a period in which the displacement signal exceeds the upper threshold when the displacement signal increases from a value smaller than the upper threshold to a value larger than the upper threshold and then decreases to a value smaller than the upper threshold. Is detected as a period showing a peak.
  • the detection unit 11441 indicates the bottom during which the displacement signal is below the lower limit threshold. Detect as a period. And detection part 11441 detects one mastication, when one bottom is detected after detecting one peak.
  • a set of peaks and bottoms one peak constituting one mastication and the bottom appearing thereafter are referred to as “a set of peaks and bottoms”.
  • FIG. 4 shows an example of a waveform indicated by the displacement signal before smoothing.
  • the waveform shown in FIG. 4 is a waveform when the user performs mastication twice with the displacement sensor 12 attached to a predetermined part of the head.
  • FIG. 5 shows an example of a waveform indicated by the displacement signal after smoothing by the smoothing unit 1142 is performed. 4 and 5, the horizontal axis represents time, and the vertical axis represents the amplitude of the displacement signal.
  • the broken line T U is the upper threshold of FIG. 4 and FIG. 5 (hereinafter, the upper limit threshold T U) indicates, the broken line T L is the lower threshold (hereinafter, the lower limit threshold T L) shows a. 4 and 5, P 1 , P 2 ,... Are periods in which the displacement signal shows a peak, and B 1 , B 2 ,... Are periods in which the displacement signal shows a bottom.
  • P 2 and B 1 are the first peak and bottom set
  • P 4 and B 2 are the second peak and bottom set
  • P 6 and B 3 are the third peak and bottom set. It becomes.
  • This third set of peaks and bottoms appears due to noise generated due to, for example, something touching the displacement sensor 12 during the second mastication. In this case, two sets of peaks and bottoms appear in the waveform indicating the second mastication, and erroneous detection of mastication occurs.
  • P 2 and B 1 are the first peak and bottom set
  • P 5 and B 2 are the second peak and bottom set. Therefore, the detection unit 11441 can correctly detect mastication.
  • the counting unit 11442 counts the number of mastications performed after the “START” button is pressed, for example, by sequentially adding mastications correctly detected by the detection unit 11441 as described above.
  • the thresholds (upper limit threshold T U and lower limit threshold T L ) are fixed values. However, the range in which the amplitude of the displacement signal changes with the user's mastication varies depending on the characteristics of the user's mastication, the position where the displacement sensor 12 is affixed, the affixing method, and the like. Absent. Therefore, the detection portion 11441 mastication detection device 1 has a function of automatically adjusting the threshold (upper limit threshold T U and lower threshold T L) to detect the chewing.
  • FIG. 6 is a diagram for explaining a threshold value determination method by the detection unit 11441.
  • the horizontal axis in FIG. 6 indicates time, and the vertical axis indicates the amplitude of the displacement signal.
  • a graph E 1 in FIG. 6 is a displacement signal after the smoothing shown in FIG.
  • the peak value on the positive side of the displacement signal indicated by the graph E 1 (the maximum value closest to the amplitude) is decreased with a predetermined time constant in a region equal to or greater than the predetermined value L U. Indicates the value.
  • the negative peak value (minimum minimum value of the amplitude) of the displacement signal indicated by the graph E 1 is increased with a predetermined time constant in a region below the predetermined value L L. Indicates the value.
  • the detecting unit 11441 acquires the smoothed displacement signal (the value indicated by the graph E 1 ) from the smoothing unit 1142, the value indicated by the graph E 2 and the value indicated by the graph E 2 are substantially based on the acquired displacement signal in real time.
  • graph E 3 calculates the value indicated.
  • the detection unit 11441 calculates a predetermined ratio (e.g., 0.8) to a value indicated by the graph E 2 the value obtained by multiplying the upper limit threshold T U.
  • the detection unit 11441 calculates a predetermined ratio to a value indicated by the graph E 3 (e.g., 0.8) the value obtained by multiplying the lower limit threshold T L.
  • Graph E 4 represents the upper limit threshold T U calculated by the detection unit 11441
  • the graph E 5 is showing a lower threshold T L is calculated by the detection unit 11441.
  • P 1, P 2, ⁇ the displacement signal specified by using the upper threshold T U to change over time is calculated as described above is a period indicated peaks.
  • B 1 , B 2 ,... are periods in which the displacement signal specified by using the lower limit threshold value T L that changes with time calculated as described above indicates the bottom.
  • the guide unit 1145 instructs the speaker 111 (sound generator) to generate a sound that guides the timing of mastication.
  • the storage unit 1146 stores various data.
  • the data storage unit 1146 stores, includes data indicating a chewing number of data, counting section 11442 has counted indicating the upper threshold T U and lower threshold T L which is determined by, for example, the detection unit 11441.
  • the display instruction unit 1147 instructs the display 112 to display various information such as the number of mastications counted by the detection / counting unit 1144.
  • the operation of the mastication detection apparatus 1 will be described.
  • the user operates, for example, the “SELECT” button, the “UP” button, the “DOWN” button, etc. to set the target number of chewing times, the chewing speed, etc., and then operates the “START” button
  • the mastication detecting device 1 The guide sound is started at a tempo corresponding to the set chewing speed. Specifically, the guide unit 1145 starts to issue a guide sound to the speaker 111, and the speaker 111 starts to generate the guide sound.
  • the displacement signal acquisition unit 11411 starts acquiring the displacement signal output from the displacement sensor 12, and the sound signal acquisition unit 11412 starts acquiring the sound signal output from the microphone 13.
  • a displacement signal indicating a waveform corresponding to the mastication by the user is smoothed by the smoothing unit 1142 and delivered to the detection / counting unit 1144.
  • the detection unit 11441 of the detection / counting unit 1144 receives the smoothed displacement signal from the smoothing unit 1142 and also receives the sound signal containing a large amount of the voice component uttered by the user from the audio filter unit 1143.
  • the detection unit 11441 is based on the smoothed displacement signal received from the smoothing unit 1142 and substantially changes in real time in the real-time upper limit threshold value T U and the graph E 4 and the graph E 5 shown in FIG.
  • the lower limit threshold value T L is continuously calculated, and a period in which the smoothed displacement signal acquired from the smoothing unit 1142 shows a peak and a period in which the bottom is shown are specified.
  • FIG. 7 is a diagram for explaining processing in which the detection / counting unit 1144 counts the number of mastications.
  • FIG. 7A is a graph showing periods (P 1 , P 2 ,%) Indicating peaks detected by the detection unit 11441 and periods (B 1 , B 2 ,...) Indicating bottoms.
  • FIG. 7B shows the change over time in the volume of the sound indicated by the sound signal subjected to the filter processing that the detection unit 11441 receives from the audio filter unit 1143.
  • the horizontal axis in FIGS. 7A and 7B indicates time.
  • the vertical axis in FIG. 7B indicates the volume.
  • the detection unit 11441 identifies a period in which the volume shown in FIG. 7B exceeds a predetermined threshold T S as a period during which the user is speaking, that is, an utterance period.
  • a predetermined threshold T S as a period during which the user is speaking.
  • the period C is an utterance period.
  • the detection unit 11441 detects the case where the peak and the bottom illustrated in FIG. However, the detection unit 11441 does not detect mastication during the utterance period. In the example of FIG. 7, the detection unit 11441 detects one mastication for each of the set of peak P 2 and bottom B 1 and the set of peak P 6 and bottom B 5 that appear in periods other than the utterance period C. . That is, regarding the set of peak P 3 and bottom B 2 and the set of peak P 4 and bottom B 3 that appear in the utterance period C, they are not detected as mastication.
  • the counting unit 11442 counts the number of mastications detected by the detecting unit 11441 as described above.
  • the detection unit 11441 does not detect mastication in the utterance period
  • a method of canceling the detection of the set may be adopted.
  • the method in which the detection unit 11441 detects mastication regardless of whether or not it is in the utterance period and the counting unit 11442 does not count mastication in the utterance period is also synonymous with the method in which the detection unit 11441 does not detect mastication in the utterance period. It is.
  • FIG. 8 is a diagram exemplifying a screen displayed on the display 112 in accordance with an instruction from the display instruction unit 1147 while the number of chewing times is counted. While watching the number of mastications (cumulative value) and the remaining number of times displayed on the display 112, the user performs mastication until the target number of times is reached.
  • the user can obtain motivation to perform a target number of times of mastication at a target speed. As a result, the chewing of the user is promoted, and the mental and physical health of the user is improved.
  • a mastication / swallowing detection apparatus 2 according to an embodiment different from the above-described embodiment of the present invention will be described below.
  • the mastication / swallowing detection device 2 is different from the mastication detection device 1 in that it detects swallowing performed by the same person in parallel with mastication.
  • the mastication / swallowing detection device 2 does not have a function that does not detect mastication during the voice period.
  • the mastication / swallowing detection device 2 has a part of the configuration and operation in common with the mastication detection device 1. Therefore, hereinafter, the description will focus on the differences between the mastication / swallowing detection device 2 and the mastication detection device 1, and the description of the points common to the mastication / swallowing detection device 2 and the mastication detection device 1 will be omitted as appropriate. To do. Moreover, in the figure used for the following description, the same code
  • FIG. 9 is an external view of the mastication / swallowing detection apparatus 2.
  • the mastication / swallowing detection apparatus 2 includes a displacement sensor 23 instead of the microphone 13 included in the mastication detection apparatus 1.
  • the displacement sensor 23 is affixed to a predetermined part of the user's neck and outputs an amplitude signal corresponding to a displacement (amount of distortion) due to a change in shape that occurs at the predetermined position when the user swallows.
  • An appropriate part as the predetermined part to which the displacement sensor 23 is attached is, for example, the vicinity of the pharynx, but may be any part of the cervix as long as the shape is changed by swallowing.
  • FIG. 10 is a diagram showing a state in which the displacement sensor 12 is attached to the user's head and the displacement sensor 23 is attached to the same user's neck.
  • the displacement sensor 12 and the displacement sensor 23 are affixed to a user's body with a medical tape etc., for example.
  • the displacement sensor 12 When the user performs mastication and swallowing as a series of operations while the displacement sensor 12 and the displacement sensor 23 are attached to the body, the displacement sensor 12 generates a signal indicating a change in shape that occurs on the surface of the head accompanying mastication.
  • the displacement sensor 23 outputs a signal indicating a change in shape that occurs on the surface of the neck as swallowing.
  • FIG. 11 is a diagram showing a functional configuration of the control unit 114.
  • the mastication / swallowing detection device 2 does not include the audio filter unit 1143 included in the mastication detection device 1. Further, the acquisition unit 1141 included in the mastication / swallowing detection device 2 does not include the sound signal acquisition unit 11412 included in the acquisition unit 1141 of the mastication detection device 1.
  • the displacement signal acquisition unit 11411 included in the mastication / swallowing detection apparatus 2 acquires a displacement signal output from the displacement sensor 23 and a first displacement signal acquisition unit 114111 that acquires a displacement signal output from the displacement sensor 12.
  • a second displacement signal acquisition unit 114112 is provided.
  • the smoothing unit 1142 included in the mastication / swallowing detection apparatus 2 smoothes the waveform indicated by the displacement signal (output signal of the displacement sensor 12) acquired by the first displacement signal acquisition unit 114111 substantially in real time. It has the 1st smoothing part 11421 and the 2nd smoothing part 11422 which smoothes the waveform which the displacement signal (output signal of the displacement sensor 23) acquired by the 2nd displacement signal acquisition part 114112 shows in real time substantially. .
  • Both the first smoothing unit 11421 and the second smoothing unit 11422 perform low-pass filter processing for attenuating the high-frequency component of the waveform indicated by the displacement signal.
  • the displacement signal is smoothed by the low-pass filter processing.
  • the cutoff frequency of the low-pass filter process performed by the first smoothing unit 11421 is different from the cutoff frequency of the low-pass filter process performed by the second smoothing unit 11422.
  • the average cycle of chewing is shorter than the average cycle of swallowing. Therefore, the cutoff frequency of the second smoothing unit 11422 is set lower than the cutoff frequency of the first smoothing unit 11421.
  • FIG. 12 is a graph illustrating the waveform of the displacement signal acquired by the displacement signal acquisition unit 11411.
  • the upper graph in FIG. 12 illustrates the waveform of the displacement signal acquired by the first displacement signal acquisition unit 114111
  • the lower graph in FIG. 12 illustrates the waveform of the displacement signal acquired by the second displacement signal acquisition unit 114112. ing.
  • FIG. 13 is a graph illustrating the waveform of the displacement signal smoothed by the smoothing unit 1142.
  • the upper graph in FIG. 13 illustrates the waveform of the displacement signal smoothed by the first smoothing unit 11421
  • the lower graph in FIG. 13 illustrates the waveform of the displacement signal smoothed by the second smoothing unit 11422. Illustrated.
  • the detection unit 11441 included in the mastication / swallowing detection apparatus 2 is smoothed by the first detection unit 114411 that detects mastication using the displacement signal smoothed by the first smoothing unit 11421 and the second smoothing unit 11422.
  • the procedure in which the second detection unit 114412 detects swallowing is the same as the procedure in which the first detection unit 114411 detects mastication, except that the upper and lower thresholds used are different.
  • the 2nd detection part 114412 specifies the period when swallowing is performed with the detection of swallowing.
  • the first detection unit 114411 does not detect mastication during the period of swallowing specified by the second detection unit 114412. This is because mastication and swallowing are usually impossible.
  • the counting unit 11442 included in the mastication / swallowing detection device 2 includes a first counting unit 114421 that counts the number of mastications detected by the first detection unit 114411 and a second counting unit that counts the number of swallowing detected by the second detection unit 114412.
  • a counting unit 114422 is included.
  • the data indicating the number of swallows counted by the first count unit 114421 and the data indicating the number of mastications counted by the second count unit 114422 are sequentially overwritten in the storage unit 1146.
  • the control unit 114 of the mastication / swallowing detection apparatus 2 includes a calculation unit 2148 as a functional component that the control unit 114 of the mastication detection apparatus 1 does not have.
  • the calculation unit 2148 performs a predetermined calculation using the number of mastications counted by the first count unit 114421 and the number of swallows counted by the second count unit 114422.
  • the calculation performed by the calculation unit 2148 is a process of dividing the number of mastications at the time when swallowing is detected by the number of swallows up to that time.
  • the average number of mastications for each swallow is calculated.
  • Data indicating the average number of mastications for each swallow calculated by the calculation unit 2148 is overwritten in the storage unit 1146 every time swallowing is detected.
  • FIG. 14 is a diagram illustrating a screen displayed on the display 112 of the mastication / swallowing detection apparatus 2 while counting the number of times of mastication and swallowing is performed. While watching the number of mastications (cumulative value) and the remaining number of times displayed on the display 112, the user performs mastication until the target number of times is reached. Meanwhile, when the user performs swallowing, the display of the number of swallowing (cumulative value) and the average number of mastications for each swallowing is also updated.
  • the user can consciously perform swallowing as well as mastication. As a result, the function of the user's swallowing is suppressed and the mental and physical health of the user is maintained.
  • the microphone 13 is a bone conduction microphone.
  • the type of the microphone 13 is not limited to the bone conduction microphone, and a normal microphone (a microphone that picks up sound transmitted through the air) may be employed.
  • a normal microphone a microphone that picks up sound transmitted through the air
  • the microphone 13 is a bone conduction microphone, the user's voice is often picked up and the surrounding sounds are not picked up so much.
  • the guide unit 1145 instructs the speaker 111 to generate a guide sound.
  • the guide unit 1145 may instruct the light emitting device to emit guide light.
  • the display 112 may be used as the light emitting device, or the mastication detection device 1 includes a light emitting device having a light emitting element such as an LED (Light Emitting Diode), and the light emitting device emits light according to an instruction from the guide unit 1145. May be.
  • the smoothing unit 1142 smoothes the displacement signal using a filter that attenuates high frequency components.
  • the method by which the smoothing unit 1142 smoothes the displacement signal is not limited to the method using a filter that attenuates high frequency components.
  • the smoothing unit 1142 may output the moving average value of the displacement signal as a smoothed displacement signal.
  • the microphone 13 is affixed on a user's face.
  • the method of attaching the microphone 13 to the user is not limited to pasting.
  • the microphone 13 may be fixed while being pressed against the surface of the user's face by a headband or the like.
  • the displacement signal output from the displacement sensor 12 may be input to the main body 11 after the sound signal output from the microphone 13 is mixed.
  • the control unit 114 includes a signal separation unit that performs a filtering process on the signal acquired by the acquisition unit 1141 and separates the displacement signal and the sound signal from the signal. Then, the smoothing unit 1142 smoothes the displacement signal separated by the signal separation unit. Moreover, the detection part 11441 specifies an utterance period based on the sound signal isolate
  • the main body 11 may have at least one input terminal.
  • the detection part 11441 specifies an utterance period based on the output signal of the microphone 13.
  • the detection unit 11441 may specify the utterance period based on a sound signal included in the output signal of the displacement sensor 12.
  • the control unit 114 includes a signal separation unit that performs a filtering process on the displacement signal acquired by the displacement signal acquisition unit 11411 and separates a sound signal included in the displacement signal from the displacement signal.
  • the detection part 11441 specifies an utterance period based on the sound signal isolate
  • the microphone 13 is not required.
  • the displacement sensor 12 and the microphone 13 are wired to the main body 11.
  • both or one of the displacement sensor 12 and the microphone 13 may be wirelessly connected to the main body 11.
  • the displacement sensor 23 may be wirelessly connected to the main body 11.
  • the method of calculating the upper limit threshold value T U and the lower limit threshold value T L performed by the detection unit 11441 is not limited to the method illustrated in the first embodiment described above, and the past output signal (displacement signal) of the displacement sensor 12 is used.
  • the maximum value in the peak period appearing in the past displacement signal is calculated as a weighted average value using a weight that decreases according to the elapsed time as the upper limit threshold T U
  • the bottom value appearing in the past displacement signal is calculated.
  • a method of calculating a value obtained by performing a weighted average of the minimum values in the period using a weight that decreases according to the elapsed time as the lower limit threshold value T L may be employed.
  • the detection unit 11441 determines thresholds (upper limit threshold and lower limit threshold) based on an output signal output from the displacement sensor 12 or the displacement sensor 23 during a period designated by the user or the like, the detection unit 11441 Even if a configuration in which mastication or swallowing performed in a specified period, that is, a period in which a displacement signal is monitored to determine a threshold value, is detected and the counting unit 11442 counts the number of mastication or swallowing is employed. Good.
  • FIG. 15 is a graph for explaining the operation of the mastication detection device 1 or the mastication / swallowing detection device 2 in this modification.
  • the graph in FIG. 15 schematically shows displacement signals output from the displacement sensor 12 before and after the start of mastication.
  • the user presses the “START” button of the button group 113 with a finger at time t1, and starts mastication while maintaining the state. Subsequently, after the user completes mastication at least once, the user releases his / her finger from the “START” button at time t2.
  • a period A shown in FIG. 15 is a period during which the user has pressed the “START” button (specified period).
  • the detection unit 11441 identifies an upper limit value and a lower limit value of the displacement signal in the period A triggered by the release of the finger from the “START” button, and a predetermined ratio (for example, 0.7) less than 1 for the upper limit value.
  • a value obtained by multiplying is determined as the upper limit threshold value, and a value obtained by multiplying the lower limit value by a predetermined ratio less than 1 (for example, 0.7) is determined as the lower limit threshold value.
  • these threshold values are determined at time point t3. Thereafter, the detection unit 11441 quickly detects mastication in the period A.
  • the detection unit 11441 detects the mastication indicated by the displacement signal used for determining the threshold retroactively after the threshold value for detecting mastication is determined at the time point t3. Thereafter, the number of mastications performed after time t2 is added to the number of mastications performed in period A.
  • mastication performed within a period required for the determination of the threshold is also detected, for example, when performing mastication reaching the target number of times, it is not necessary to perform extra mastication for determination of the threshold, desirable.
  • the mastication / swallowing detection device 2 does not specify the utterance period, but the mastication / swallowing detection device 2 includes the microphone 13 and the like, similar to the mastication detection device 1, A configuration in which the utterance period is specified and mastication or swallowing is not detected in the utterance period may be employed.
  • FIG. 16 is a graph for explaining the operation of the mastication / swallowing detection apparatus 2 in this modification.
  • the upper graph in FIG. 16 shows the displacement signal output from the displacement sensor 12 and smoothed by the first smoothing unit 11421, and the lower graph in FIG. 16 is output from the displacement sensor 23, and the second smoothing unit
  • the displacement signal smoothed by 11422 is shown, and the horizontal axis (time axis) is aligned.
  • First count unit 114421 first counts from 1 the number of chewing cycles detected by first detection unit 114411 in period B. Thereafter, when swallowing is detected by the second detection unit 114412 in the period C, the first count unit 114421 resets the number of mastications counted in the period B to 0, and in the period D following the period C, the first detection unit The number of mastications detected by 114411 is counted again from 1.
  • the first count unit 114421 performs the same process in a period following the period D (periods E, F).
  • the mastication detection device 1 includes the displacement sensor 12 and the microphone 13. Instead of this, the mastication detection device 1 does not include at least one of the displacement sensor 12 and the microphone 13, and at least one of the displacement sensor and the microphone that the mastication detection device 1 does not have is connected to the mastication detection device 1. It may be adopted.
  • the mastication / swallowing detection device 2 includes the displacement sensor 12 and the displacement sensor 23. Instead of this, the mastication / swallowing detection device 2 does not include at least one of the displacement sensor 12 and the displacement sensor 23, and at least one of the displacement sensors that the mastication / swallowing detection device 2 does not have is included in the mastication / swallowing detection device 2.
  • a connected configuration may be employed.
  • the main body 11 of the mastication detection device 1 or the mastication / swallowing detection device 2 does not include at least one of the speaker 111 and the display 112, and at least one of the speaker and the display that the main body 11 does not have is connected to the main body 11. May be adopted.
  • the computer performs processing performed by the device exemplified by the mastication detection device 1 or the mastication / swallowing detection device 2
  • a program for realizing the apparatus by a computer is provided.
  • the program may be distributed in a state where it is recorded on a recording medium, or may be distributed in a form distributed to a computer via a network such as the Internet.
  • the mastication detection device 1 or the mastication / swallowing detection device 2 described above may include a communication unit, and may perform data communication with the server device via a network.
  • the administrator confirms and manages the operation status of the plurality of mastication detection devices 1 or mastication / swallowing detection devices 2 used by different users remotely via the server device, the detection result of mastication or swallowing, and the like. can do.
  • the mastication detection apparatus 1 counts the number of mastications by the counting unit 11442.
  • the mastication / swallowing detection apparatus 2 counts the number of mastications and the number of swallows by the counting unit 11442.
  • the mastication detection device 1 or the mastication / swallowing detection device 2 does not include the counting unit 11442 and detects mastication or swallowing, a configuration that does not count those times may be employed.
  • the storage unit 1146 stores, for example, data indicating the timing at which mastication or swallowing is detected in time series. This data is used, for example, by a doctor or the like for guidance on mastication or swallowing.
  • the mastication / swallowing detection apparatus 2 according to the second embodiment described above may be modified so that only mastication is detected without detecting mastication.
  • the detection unit 11441 detects a peak first from the displacement signal and then detects the bottom, it detects a single mastication. Described as an example. Whether the peak or the bottom corresponding to one mastication appears first depends on the direction in which the displacement sensor is attached to the head. Therefore, when the detection unit 11441 detects a peak first, when detecting the peak and a set of bottoms following the peak, the detection unit 11441 detects one mastication, and when detecting the bottom first, When a bottom and a set of peaks following the bottom are detected, one chewing is detected.
  • the detection unit 11441 of the mastication / swallowing detection apparatus 2 according to the second embodiment detects mastication and when the detection unit 11441 of the mastication / swallowing detection apparatus 2 according to the second embodiment detects detection of swallowing. It is.
  • the mastication detection device 1 or the mastication / swallowing detection device 2 includes the speaker 111, and guides the timing of mastication by the sound emitted by the speaker 111.
  • the mastication detection device 1 or the mastication / swallowing detection device 2 may not include the speaker 111. In this case, the mastication detection device 1 or the mastication / swallowing detection device 2 may guide the timing of mastication by, for example, blinking dots on the display 112, or may not be performed.
  • First smoothing unit 11422 ... Second smoothing unit, 11441 ... Detection unit, 11442 ... Count unit, 114111 ... First displacement signal acquisition unit , 114112 ... second displacement signal acquisition unit, 114411 ... first detection unit, 114412 ... second detection unit, 114421 ... 1 count unit, 114,422 ... the second count unit.

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Abstract

L'invention concerne un moyen permettant de détecter correctement la mastication ou la déglutition. Le dispositif de détection de mastication 1 selon l'invention comprend un corps principal 11, un capteur de déplacement 12 connecté au corps principal 11, et un micro 13. Le capteur de déplacement 12 se fixe aux joues ou autres de l'utilisateur, et le microphone 13 au voisinage de ses tempes ou autres. Le corps principal 11 lisse une forme d'onde représentée par un signal de sortie du capteur de déplacement 12, détecte la mastication d'après la forme de la forme d'onde après lissage, et compte le nombre de mouvements de mastication détectés. Cependant, le corps principal 11 spécifie, sur la base du signal de sortie du microphone 13, un temps de parole de l'utilisateur et ne procède pas à la détection de la mastication pendant ledit temps de parole. Tout en mastiquant de manière synchrone avec les sons de guidage émis par un haut-parleur 111, l'utilisateur vérifie la valeur cumulée de mouvements de mastication qui s'affiche sur un dispositif d'affichage 112, et peut ainsi facilement parvenir au nombre de mastications cible.
PCT/JP2018/014112 2017-03-31 2018-04-02 Dispositif de détection de mastication ou de déglutition WO2018182043A1 (fr)

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JP2020192002A (ja) * 2019-05-27 2020-12-03 Kddi株式会社 信号データに応じた基準値に基づき生体信号の計数を行う生体信号処理装置、プログラム及び方法
JP2022048693A (ja) * 2020-09-15 2022-03-28 国立大学法人岩手大学 耳周辺装着具
JP2023094218A (ja) * 2021-12-23 2023-07-05 サンスター株式会社 情報処理装置、咀嚼トレーニングシステム、咀嚼評価方法、咀嚼トレーニングプログラム、および、記録媒体
JP2023172349A (ja) * 2022-05-23 2023-12-06 株式会社村田製作所 頚部の運動測定装置
GB2639842A (en) * 2024-03-22 2025-10-08 Emteq Ltd Monitoring mouth activities

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JP2023094218A (ja) * 2021-12-23 2023-07-05 サンスター株式会社 情報処理装置、咀嚼トレーニングシステム、咀嚼評価方法、咀嚼トレーニングプログラム、および、記録媒体
JP2023172349A (ja) * 2022-05-23 2023-12-06 株式会社村田製作所 頚部の運動測定装置
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GB2639842A (en) * 2024-03-22 2025-10-08 Emteq Ltd Monitoring mouth activities

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