KR20220169316A - Smart sensors with standby mode, Vibration noise measuring devices and method for ships using the smart sensors, and ships applying them - Google Patents

Abstract

The present invention relates to vibration and noise measurement and monitoring, and more particularly, when one main smart sensor measures vibration and noise from the machinery of a ship in operation and exceeds a threshold value, a plurality of sub smart sensors and APs are measured. It relates to an activating device and method. To this end, it is a sensor for measuring vibration or noise of a ship, and a sensor unit for measuring vibration or noise of a ship; a time data file generation unit generating a time domain data file based on the measurement signal of the sensor unit; a sensor communication unit that transmits a time domain data file to the AP unit and receives a control command from the AP unit; A sensor power supply unit supplying power required for operation of the sensor; a trigger generating unit generating a trigger signal when the measurement signal exceeds a threshold value; Trigger receiving unit for controlling the sensor power supply unit based on the trigger signal received from the outside; and a sensor control unit configured to operate in one of a monitoring mode in which the sensor is activated and a standby mode in which the sensor is inactivated.

Description

Smart sensors with standby mode, Vibration noise measuring devices and method for ships using the smart sensors, and ships applying them}

The present invention relates to vibration and noise measurement and monitoring, and more particularly, when one main smart sensor measures vibration and noise from the machinery of a ship in operation and exceeds a threshold value, a plurality of sub smart sensors and APs are measured. It relates to an activating device and method.

Recently, cases of applying smart ship technology to ocean-going ships (eg, container ships, oil tankers, LNG carriers, etc.) are increasing. Smart ship is a technology that collects important data of the ship by installing navigation data collection equipment and satellite communication transmission module on the ship, and converts the collected data into a database and assets. In addition, the collected ship voyage data is transmitted to the land control center through satellite, and is used in decision-making by the operator.

From this point of view, the data collected about ships in operation are diverse, such as power, communication, vibration, noise, flow rate, speed, location, and weather. Among these, key mechanical parts such as engines, generators, boilers, and pumps have the greatest impact on the safety and operation schedule of ships.

Mechanical parts such as the ship's engine, generator, and boiler are operated 24 hours a day without stopping during the operation period (eg 20 to 40 days). Therefore, it is necessary to continuously monitor and maintain the operating state during operation. During this monitoring, vibration and noise generated from ship engines, generators, boilers, and pumps become industry standard parameters for determining normal operation and predicting maintenance (Condition monitoring and diagnostics of machines, ISO.FDIS 17359:2002 see (E))

To this end, various vibration sensors or acoustic sensors that can be used by attaching to machinery have been provided. However, conventional vibration sensors or acoustic sensors are always a method of performing measurement and analysis in real time or at regular time intervals. In the case of continuous measurement and analysis, the sensor is large and complex, and there is a difficulty in installation due to wiring considerations. In addition, in the case of wireless communication, the power consumption of the battery is high, and there is an inconvenience that it must be replaced frequently, and it is difficult to apply it to unmanned autonomous ships due to such replacement work.

In addition, in the case of wired communication, there is a technical difficulty in wiring within a narrow space of a ship. In particular, considering that it is a narrow space made of steel and an internal space of a ship manufactured considering waterproofing, it is almost impossible to additionally wire a sensor for a ship already in operation.

In addition, when measurement and analysis are performed at regular time intervals (e.g., 1 to 2 times/day), it is not possible to secure data during the non-measurement period, and it is difficult to understand the situation when an abnormal situation occurs, so countermeasures or solutions It was difficult to come up with

Therefore, it is necessary to research and develop an optimal monitoring method or system configuration for effective vibration and noise monitoring that can be realized in a ship. Moreover, in the field of recent smart ship technology, there is also a need for the land control headquarters to share vibration noise generated from ships in operation in almost real time.

1. Republic of Korea Patent Registration No. 10-1409986 (Vibration Monitoring Defect Diagnosis Device), 2. Korean Patent Registration No. 10-0444568 (a business method for an integrated monitoring operating system using the Internet and a computer-readable recording medium containing a program capable of implementing it).

Therefore, the present invention has been devised to solve the above problems, and the problem to be solved by the present invention is a smart sensor having a standby mode capable of monitoring the vibration and noise of the vessel with minimum power, and the vibration of the vessel using the same It is to provide a noise measuring device and measuring method, and a ship to which the same is applied.

Another object of the present invention is a smart sensor having a standby mode capable of managing vibration and noise while securing regularity and real-time of vibration and noise for major machinery in a ship, and a vibration and noise measuring device and measuring method of a vessel using the same , and to provide a ship to which it is applied.

However, the technical problems to be achieved in the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned will be clear to those skilled in the art from the description below. You will be able to understand.

In order to achieve the above technical problem, it is a sensor for measuring the vibration or noise of the ship, the sensor unit for measuring the vibration or noise of the ship; a time data file generation unit generating a time domain data file based on the measurement signal of the sensor unit; a sensor communication unit that transmits a time domain data file to the AP unit and receives a control command from the AP unit; A sensor power supply unit supplying power required for operation of the sensor; a trigger generating unit generating a trigger signal when the measurement signal exceeds a threshold value; Trigger receiving unit for controlling the sensor power supply unit based on the trigger signal received from the outside; and a sensor control unit configured to operate in one of a monitoring mode in which the sensor is activated and a standby mode in which the sensor is inactivated.

In addition, it further includes a power generation unit that generates power based on vibration, and the power generated by the power generation unit is charged to the sensor power unit.

In addition, the trigger generation unit generates a trigger signal when the generated power exceeds a predetermined power threshold.

In addition, in case of monitoring mode, the sensor unit from the sensor power supply unit, time data file generation unit, sensor communication unit, trigger generating unit, trigger receiving unit; and power is supplied to the sensor control unit.

In addition, in the case of the standby mode, power is supplied from the sensor power supply unit to the trigger receiving unit and the sensor communication unit, and the sensor unit, the time data file generating unit, and the trigger generating unit; And power supplied to the sensor control unit is cut off.

Also, the threshold value is a threshold amplitude in the time domain or a critical frequency or critical frequency band in the frequency domain.

In addition, the trigger generating unit is activated in the monitoring mode, the trigger receiving unit is deactivated, and the trigger generating unit is deactivated and the trigger receiving unit is activated in the standby mode.

In addition, as another embodiment, the object of the present invention as described above is provided with a plurality of the above-described smart sensors, and includes an AP unit connected to the plurality of smart sensors, and the AP unit is a sensor communication unit capable of data communication with the smart sensors. ; A server communication unit capable of data communication with the server device; AP power supply unit for supplying power required for operation of the AP unit; A standby monitoring unit that receives a trigger signal from a smart sensor and transmits the trigger signal to the smart sensor; It can also be achieved by a vibration and noise measuring device of a ship using a smart sensor, characterized in that it includes; and an AP control unit that operates in one of a monitoring mode in which the AP unit is activated and a standby mode in which the AP unit is inactivated.

In addition, the plurality of smart sensors include one main smart sensor operating in a monitoring mode, and other smart sensors other than the main smart sensor are sub smart sensors operating in a standby mode.

Also, in the standby mode, power is supplied from the AP power supply to the standby monitoring unit and the sensor communication unit.

Another object of the present invention as described above is another category, in the method for measuring vibration and noise of a ship using the above-described vibration and noise measuring device, (i-1) confirming the communication connection of a plurality of smart sensors connected to the AP unit and the AP unit. Step (S120); and (i-2) operating a main smart sensor among a plurality of smart sensors in a monitoring mode, and operating an AP unit and sub smart sensors in a standby mode (S140); (ii) generating a trigger signal by the trigger generation unit when the main smart sensor detects vibration or noise exceeding a threshold (S200); (iii-1) AP unit receiving a trigger signal and switching to a monitoring mode (S320); (iii-2) the AP unit transmits a trigger signal to the sub smart sensor, thereby switching the sub smart sensor to a monitoring mode (S340); (iii-3) measuring vibration or noise by the main smart sensor and the sub smart sensor (S360); (iii-4) the main smart sensor and the sub smart sensor transmitting measurement data to the AP unit (S370); And (iii-5) transmitting the measurement data by the AP unit to the server device (S380); it can also be achieved by a method for measuring vibration and noise of a ship, characterized in that it includes.

In addition, after the transmission step to the server device (S380), it is executed again from the communication connection confirmation step (S120).

The object of the present invention can be achieved by a ship having the above-described vibration and noise measuring device.

According to one embodiment of the present invention, the vibration and noise of the ship can be monitored with minimum power. Therefore, the battery used in the smart sensor can be used for a long time, and the battery replacement work can be minimized.

In addition, when abnormal noise or vibration of machinery is generated, it is immediately activated and measured, so that constant and real-time characteristics of vibration noise can be secured. Due to this, when an abnormal situation occurs, it is possible to quickly grasp the situation and prepare an accurate solution.

In addition, even if the smart sensor and the AP unit are installed throughout the ship, power consumption can be minimized, thereby reducing the power burden on the ship. In addition, there is an advantage in that the data communication load of the in-vessel network and the processing load of the server device can be greatly reduced. Therefore, there is an economic feasibility that does not require a large-capacity server device, storage device, or high-speed processing device.

In addition, since it is possible to share abnormalities in vibration and noise generated by ships operating in the ocean with the onshore control center in almost real time, there is an advantage in obtaining accurate advice from external personnel when a breakdown or abnormal situation occurs.

However, the effects obtainable in the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below. You will be able to.

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and together with the detailed description of the present invention serve to further understand the technical idea of the present invention, the present invention is the details described in such drawings should not be construed as limited to
1 is a schematic diagram of a ship and land control server 3 to which the present invention is applied;
2 is a schematic configuration diagram of a system to which a smart sensor having a standby mode and a vibration and noise measuring device using the same according to the present invention are applied;
3 is a schematic system block diagram of the ship 5 shown in FIG. 1;
4 is a perspective view of a smart sensor 10 according to an embodiment of the present invention;
5 is a schematic block diagram of the smart sensor 10 shown in FIG. 4;
6 is a schematic block diagram of the AP unit 300 shown in FIGS. 2 and 3;
7 is a time domain graph of vibration measured by the smart sensor 10 according to the present invention;
8 is a flowchart illustrating a method for measuring vibration and noise of a ship according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. However, since the description of the present invention is only an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, since the embodiment can be changed in various ways and can have various forms, it should be understood that the scope of the present invention includes equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all of them or only such effects, the scope of the present invention should not be construed as being limited thereto.

The meaning of terms described in the present invention should be understood as follows.

Terms such as "first" and "second" are used to distinguish one component from another, and the scope of rights should not be limited by these terms. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element. It should be understood that when an element is referred to as “connected” to another element, it may be directly connected to the other element, but other elements may exist in the middle. On the other hand, when an element is referred to as being “directly connected” to another element, it should be understood that no intervening elements exist. Meanwhile, other expressions describing the relationship between components, such as “between” and “immediately between” or “adjacent to” and “directly adjacent to” should be interpreted similarly.

Singular expressions should be understood to include plural expressions unless the context clearly dictates otherwise, and terms such as “comprise” or “having” refer to a described feature, number, step, operation, component, part, or It should be understood that it is intended to indicate that a combination exists, and does not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless defined otherwise. Terms defined in commonly used dictionaries should be interpreted as consistent with meanings in the context of related art, and cannot be interpreted as having ideal or excessively formal meanings unless explicitly defined in the present invention.

Configuration of the embodiment

Hereinafter, the configuration of a preferred embodiment will be described in detail with reference to the accompanying drawings. 1 is a schematic diagram of a ship and land control server 3 to which the present invention is applied. As shown in FIG. 1 , the vessel 5 or a plurality of other vessels 5a may be a container ship, an oil tanker, an LNG carrier, a cargo ship, or a cruise ship operating on the ocean. Such a vessel 5 or a plurality of other vessels 5a can communicate individually with the land control server 3 through the satellite 2, and can transmit data in both directions.

2 is a schematic configuration diagram of a system to which a smart sensor having a standby mode and a vibration and noise measuring device using the same according to the present invention are applied. As shown in FIG. 2, the engine 30 is the main engine of the ship, has a height of 9 to 10 m, and generates vibration, noise and high temperature during operation. The smart sensor 10 is installed in various locations on the engine 30. For example, the smart sensor 10 may be installed in several places on the upper side of the engine 30, in several places in the middle position, in several places in the lower position, and in the bearing housing of the rotating shaft.

The AP unit 300 may be installed by attaching it to the ceiling or wall of each deck in the engine room. Each AP unit 300 is connected to a plurality of smart sensors 10 through wire or wireless. One AP unit 300 is composed of one main smart sensor 10a and a plurality of sub smart sensors 10b. This combination can be installed in multiple locations within the vessel 5 or multiple machinery.

The AP unit 300 is connected to the gateway 1390 of the server device 1300 through a wired or wireless connection.

FIG. 3 is a schematic system block diagram of the ship 5 shown in FIG. 1 . As shown in FIG. 3, a server device 1300, a plurality of smart sensors 10, and a plurality of AP units 300 are installed in the ship 5.

The server device 1300 may be composed of a server computer, a workstation, and the like.

The satellite communication unit 1320 transmits the time domain data file and the frequency domain data file stored in the storage unit 1330 to the satellite 2 1 to 5 times a day. Or, when a special or dangerous situation occurs, the corresponding file is transmitted according to the user's command. In addition, the satellite communication unit 1320 may receive a control command (eg, remote control) or data from the land control server 3 .

The storage unit 1330 stores the time domain data file received from the AP unit 300 and the frequency domain data file converted by the FFT unit 1360. The storage unit 1330 may be a hard disk drive, SSD, flash memory, CD-ROM writer, and the like.

The server signal processing unit 1350 uses the frequency domain data converted by the FFT unit 1360 to generate a frequency domain data file. In addition, the server signal processing unit 1350 periodically processes statistical data such as average, maximum value, and distribution from the time domain data file and the frequency domain data file. The server signal processing unit 1350 executes various add on analysis algorithms using the time domain data file and the frequency domain data file.

The display 1340 may be a monitor, speaker, or the like that displays the processing process or processing result of the controller 1310.

The FFT unit (Fast Fourier Transformation, 1360) generates data for each frequency band using a time domain data file.

The database unit 1370 (eg SCADA DB) is composed of a database table for maintenance of the entire system and a database table for storing transmitted measurement data. Among the database tables, the sensor management DB (not shown) defines fields such as the serial number of the smart sensor 10, location, date of manufacture, date of purchase, firmware updater version and date of update. In the error and abnormality DB (not shown), the history of errors, defects, and abnormalities related to vibration and noise of the machine is sequentially stored. To this end, the error and anomaly DB has fields such as occurrence order, occurrence date, type of error, and follow-up action.

The alarm unit 1380 is a member that informs when vibration, noise, or temperature outside of a reference value is detected. The alarm unit 1380 may be a speaker, a warning light, a buzzer, or a warning display on the display 1340 .

An input terminal of the gateway 1390 is connected to a plurality of AP units 300, and an output terminal is connected to the control unit 1310 of the server device 1300.

The controller 1310 performs operation, control, instruction, calculation, and judgment of the server device 1300, and may be a CPU or the like.

The AP unit (Access Point, 300) is capable of wireless communication with a plurality of (eg, 2 to 6) smart sensors 10, and these AP units 300 are attached to the wall or ceiling in the ship 5, respectively. . To this end, the AP unit 300 includes at least one of a Bluetooth communication module, a Wi-Fi communication module, an infrared communication module, a LAN communication module, a ZigBee communication module, a 3G, 4G communication module, and a USB communication module.

One AP unit 300 includes one main smart sensor 10a and a plurality of sub smart sensors 10b. In a normal state, the main smart sensor 10a is activated and operates in a monitoring mode, and the AP unit 300 and the sub smart sensors 10b are deactivated and operate in a standby mode. The AP unit 300 has a plurality of communication channels connected to a plurality of smart sensors 10, and operates the smart sensor 10 connected to channel 1 as the main smart sensor 10a, and The smart sensor 10 connected to channel n is operated as a sub smart sensor 10b.

Activation of the smart sensor 10 in this specification means that sufficient power is supplied to each component of the smart sensor 10, and an operation (measurement or calculation) function is performed. In addition, deactivation of the smart sensor 10 means that only the minimum components of the smart sensor 10 (eg, the sensor communication unit 160 and the trigger receiving unit 220) are supplied with power, and power is not supplied to the other components. It means an operating state, and means that an operating (measurement or calculation) function is not being performed.

In this specification, the monitoring mode means a mode in which the smart sensor 10 is activated to measure vibration or noise in real time and transmit it to the outside. The standby mode means a mode in which the smart sensor 10 is deactivated and waits until a trigger signal is input from the outside. When the first event (C) exceeding a predetermined threshold occurs, the standby mode is switched to the monitoring mode.

4 is a perspective view of a smart sensor 10 according to an embodiment of the present invention. As shown in FIG. 4, the defect notification unit 230 by LED is exposed on the upper surface of the smart sensor 10, the power generation unit 80 is installed in the middle, and the attachment unit 20 for fixing is installed in the lower part. is composed

The defect notification unit 230 exposes the operating state or current mode of the smart sensor 10 to the outside. The expression method can be a lamp, LED, LCD, warning light, speaker, buzzer, etc., and text transmission through the sensor communication unit 160 is also possible. If the defect notification unit 230 is an LED, "green" light is emitted in standby mode, "red" light is emitted in monitoring mode, and "yellow" light is emitted or blinks in the case of a warning or an error.

The attachment part 20 may be composed of a permanent magnet, so that it can be easily attached to the surface of a machine made of steel and can be removed by hand. Therefore, the user may measure vibration and noise while touching the smart sensor 10 here and there in the machine. The attachment part 20 can be bonded with an adhesive, and can be coupled with a machine using bolts or screws. Optionally, the lower surface of the attachment portion 20 may form a curved portion 25 so that it can be installed in a form-fitting manner on the surface of a cylindrical member (eg, pipe).

In addition, the smart sensor 10 may be installed in a generator, a boiler, an auxiliary engine, a pipe, a bearing of a rotating shaft, a transmission, a wall of an engine room, a floor, a pump, etc. in addition to the engine 30 of a ship.

5 is a schematic block diagram of the smart sensor 10 shown in FIG. As shown in FIG. 5 , the sensor unit 100 may include a temperature sensor, a humidity sensor, an acceleration sensor, a gyro sensor, and the like in addition to the vibration sensor 120 and the acoustic sensor 110 . The vibration sensor 120 may measure vibration in the X-axis, Y-axis, and Z-axis directions, respectively. The acoustic sensor 110 detects ambient noise and may be a microphone. The vibration sensor 110, the acoustic sensor 120, the temperature sensor, the humidity sensor, and the acceleration sensor may have an output frequency of 0.1 second to 1 second interval (0.1 to 1 Hz).

The signal processing unit 130 includes a filter, an amplifier, an analog-digital converter (ADC), a digital signal processor (DSP), and the like. The signal processing unit 130 converts the electrical signal of the sensor unit 100 into discrete data. Since these components are known components, detailed internal descriptions thereof will be omitted.

The time data file generation unit 140 receives the signal processed by the signal processing unit 130 and generates a time data file. The time domain data file is in a text (TEXT) file format, and can be compressed and transmitted in a known compression format (eg, ZIP file). Such compressed transmission has an effect of reducing transmission time and network load. The time domain data file includes the location where the corresponding smart sensor 10 is installed (e.g., engine top, engine bottom, boiler middle, pump 1, etc.), serial number of the smart sensor 10 (e.g., 001, 002, etc.), measurement time (e.g. 20210325_18161212: March 25, 2021 18:16:12:12). And, at least among the X-axis amplitude (eg: 0.2315), Y-axis displacement (eg: 0.8723), Z-axis displacement (eg: 0.0001), and sound signal (eg: 76 dB) measured by the smart sensor 10 contains one Other error codes (eg: 1 (normal), 0 (low power), 2 (communication failure), 3 (sensor malfunction), etc.), temperature data, humidity data, acceleration data, etc. may also be included. The time domain data file includes sensor data for 1 minute based on the measurement time.

The time data file generation unit 140 continuously generates time domain data files by receiving signals from the sensor unit 100 every 30 seconds to 3 minutes. Preferably, it is good to receive for 1 minute. And, the time data file generating unit 140 continuously generates time domain data files in the monitoring mode. Optionally, the time data file generator 140 generates a time domain data file periodically (eg, every 5 to 15 minutes) or generates a time domain data file according to a synchronization command periodically output from the server device 1300. can create Preferably, it is good to create a file every 10 minutes.

Also, the time data file generator 140 may have a time resolution of 0.1 to 1 Hz when receiving data for 1 minute. This is because the time range and resolution can minimize the overall communication load by reducing the file size and obtain the optimal amplitude resolution.

As a modified example of the present invention, the time data file generator 140 may set the time resolution smaller or larger according to the type of machinery to which the smart sensor 10 is attached. For example, since the engine 30 has a vibration frequency range of less than 400 Hz, the time resolution is set to 1 Hz, and the generator has a vibration frequency range of less than 1.6 KHz, so the time resolution is set to 0.5 Hz, and the pump has a vibration frequency range of less than 3.2 KHz, so the temporal resolution can be set to 0.1 Hz.

The sensor data storage unit 150 stores time domain data files generated in the monitoring mode. The sensor data storage unit 150 may be a hard disk, flash memory or SSD. When the storage capacity is exceeded, the sensor data storage unit 150 secures storage space by sequentially deleting transmitted or old files.

The sensor communication unit 160 transmits data stored in the sensor data storage unit 150 to the AP unit 300 through the terminal unit 170 and receives a control command (eg, a trigger signal) from the AP unit 300 . The AP unit 300 determines whether the received time domain data file is damaged. If the file is damaged or an error occurs during transmission, retransmission of the time domain data file is requested, and this process is repeated until it is determined that the file is not damaged.

The sensor communication unit 160 may be a wireless communication or wired communication of at least one of a Bluetooth communication module, a Wi-Fi communication module, an infrared communication module, a LAN communication module, a ZigBee communication module, a 3G, 4G communication module, and a USB communication module.

The sensor power supply unit 190 may be a secondary battery capable of being charged by receiving power generated by the power generation unit 180 . The sensor power supply unit 190 supplies power throughout the sensor control unit 200 and the smart sensor 10 in monitoring mode. The sensor power supply unit 190 supplies power only to the sensor communication unit 160 and the trigger receiving unit 220 in the standby mode. The sensor power supply unit 190 may be operated in a monitoring mode according to a control command of the trigger receiving unit 220 .

The power generation unit 80 is a component that converts the vibration of a mechanical device (eg, an engine) to which the smart sensor 10 is attached into electrical energy. As the mechanical device vibrates, a weight (not shown) supported by a spring (not shown) vibrates, and current is generated by a known configuration such as a magnet, a bobbin, or a coil. The power generation unit 80 may be applied with various power generation mechanisms such as rotary power generation by an eccentric (not shown) in addition to bidirectional vibration. The power generation unit 80 may continue to generate power until the sensor power unit 190 is fully charged as long as there is vibration regardless of the monitoring mode or the standby mode.

The sensor controller 200 controls the smart sensor 10 to operate in a monitoring mode or a standby mode according to a communication channel connected to the AP unit 300 . Alternatively, a dip switch capable of selecting an operation mode may be configured in the smart sensor 10, or the operation mode may be designated by software in the AP unit 300.

The sensor control unit 200 may monitor the power generated in the power generation unit 80 to determine whether the vibration is abnormal. When the vibration is normal, the generator 180 produces power that does not exceed a predetermined power or a power threshold. If the amplitude is greater than a predetermined threshold value, the power generated by the generator 180 also exceeds the predetermined power threshold value. In this case, the trigger generating unit 210 generates a trigger signal. The sensor control unit 70 controls the control, calculation, judgment, and operation of the entire smart sensor 10, and may be implemented with a CPU, MICOM, or the like.

The trigger generation unit 210 generates a trigger signal when a first event C occurs in which a measurement signal of the sensor unit 100 exceeds a threshold value in the monitoring mode. The generated trigger signal is transmitted to the AP unit 300 through the sensor communication unit 160 .

The trigger receiving unit 220 stands by waiting for a trigger signal to be received from the outside in a standby mode. When a trigger signal is received, the trigger receiving unit 220 supplies power to the smart sensor 10 by controlling the sensor power supply unit 190 so as to enter the monitoring mode.

The terminal unit 170 is an electronic component to which a cable connector is connected in case of wired communication. Optionally, in the case of wireless communication, the terminal unit 170 may be an antenna.

6 is a schematic block diagram of the AP unit 300 shown in FIGS. 2 and 3 . As shown in Figure 6, AP communication unit 320 is provided with a plurality of communication channels for connecting with the smart sensor (10). The AP communication unit 320 may be a wired communication module or a wireless communication module. The wireless communication module adopts at least one of a Bluetooth communication module, a Wi-Fi communication module, an infrared communication module, a LAN communication module, a 3G, 4G communication module, and a USB communication module to enable two-way communication with the smart sensor 10.

Standby monitoring unit 330 may receive a trigger signal from the smart sensor 10, and also transmit a trigger signal to the smart sensor (10).

The AP power unit 340 may always receive power from the outside or may be a secondary battery. The AP power unit 340 supplies power throughout the AP unit 300 in monitoring mode. The AP power unit 340 supplies power only to the AP communication unit 320 and the standby monitoring unit 330 in the standby mode. The AP power unit 340 may be operated in a monitoring mode according to a control command of the standby monitoring unit 330 .

The server communication unit 350 enables communication with the server device 1300 by wire or wirelessly.

The AP display 360 may be an LCD screen or LED displaying the status, operation mode, error, and the like of the AP unit 300 .

The AP storage unit 370 stores time domain data files and the like received from the smart sensor 10 . The AP storage unit 370 may be a hard disk drive, SSD, flash memory, CD-ROM writer, or the like.

The AP input unit 380 may be a button capable of inputting control commands, a USB port, a key matrix, and the like.

The AP control unit 310 controls the AP unit 300 to operate in a monitoring mode or a standby mode. The AP control unit 310 is set to operate the AP unit 300 in a standby mode first. The AP control unit 310 switches the AP unit 300 to a monitoring mode when a trigger signal is input. The AP control unit 310 controls the entire control, calculation, judgment, and operation of the AP unit 300, and may be implemented with a CPU, MICOM, or the like.

Operation of the embodiment

Hereinafter, the operation of the present invention having the above configuration will be described in detail with reference to the accompanying drawings. 8 is a flowchart illustrating a method for measuring vibration and noise of a ship according to an embodiment of the present invention.

First, the smart sensor 10 is installed at various locations of the engine 30 and connected to the AP unit 300 by wire or wirelessly. Then, the AP unit 300 checks the communication connection of the plurality of smart sensors 10 connected to the AP unit 300 (S120). Through this, it is possible to check how many smart sensors 10 are connected, the smart sensor 10 connected to channel 1 is recognized as the main smart sensor 10a, and the remaining smart sensors 10 are sub-smart sensors 10b. recognized as In the main smart sensor 10a, when the trigger generation unit 210 operates and exceeds a threshold value, a trigger signal is generated immediately.

Then, the main smart sensor 10a operates in a monitoring mode, and the AP unit 300 and the sub smart sensor 10b operate in a standby mode (S140). This allows it to be kept at minimum power. The main smart sensor 10a determines whether the measured signal is vibration or noise exceeding a threshold. If it is below the threshold value, it is determined as a normal operation and step S140 is continuously maintained.

If excessive vibration or noise is generated from the engine 30, the main smart sensor detects it. When the detected signal is vibration or noise exceeding the threshold, the trigger generating unit generates a trigger signal (S200). This ends the standby mode.

7 is a time domain graph of vibration measured by the smart sensor 10 according to the present invention. As shown in FIG. 7 , when the measured signal is equal to or less than the first threshold value A (eg, 1.8 mm/s), it is determined to be normal and the standby mode is maintained. If the measured signal is equal to the first threshold value (A), it is determined that the first event (C) has occurred, it is determined as “caution”, and the monitoring mode is switched. If the measured signal exceeds the second threshold (B) (eg: 7.1 mm/s), it is judged as “abnormal” and countermeasures are taken.

Then, the AP unit 300 receives the trigger signal and switches to the monitoring mode (S320). More specifically, the trigger signal received through the AP communication unit 320 is transmitted to the standby monitoring unit 330, and the standby monitoring unit 330 controls the AP power supply unit 340 to power the entire AP unit 300. supply

In addition, the standby monitoring unit 330 transmits a trigger signal to all sub smart sensors 10b through the AP communication unit 320, so that the sub smart sensors 10b are switched to the monitoring mode (S340). After receiving the trigger signal, the trigger receiving unit 220 of the sub smart sensor 10b supplies power to the entire smart sensor 10 by controlling the sensor power unit 210 .

Next, the main smart sensor 10a and the sub smart sensors 10b and 10n measure vibration or noise (S360). The measured signal is filtered, amplified, and digitally converted by the signal processor 130, and then converted into a time data file by the time data file generator 140. A plurality of time data files transmitted by each smart sensor 10 are transmitted to the AP unit 300 through the sensor communication unit 160 (S370).

Then, in the AP unit 300, it is transmitted to the server device 1300 by the server communication unit 350 (S380). When all data communication is completed or a first event (C) in which a signal below the threshold value is detected occurs, the monitoring mode is terminated and the standby mode is restarted. That is, it is executed again from the communication connection check step (S120). Through this process, the AP unit 300 and the plurality of smart sensors 10 repeat the standby mode and the monitoring mode, and measurement and transmission are performed only when an abnormal operation is detected.

As shown in FIG. 7, when the sensed amplitude signal continues to be “abnormal” beyond the second threshold value B, the accumulated amount of the abnormal amplitude is calculated as an area. The first critical area S1 and the second critical area S2 are calculated by [Equation 1].

[Equation 1]

That is, the first critical area S1 is an area between the second event D and the third event E, and the second critical area S2 is the area after the third event E. When the sensed amplitude signal exceeds the second threshold value (B) and continues in the "abnormal" state, the second event (D) is the moment of time exceeding the second threshold value (B). The third event (E) is the time after a certain time (eg, 1 hour) has elapsed from the second event (D).

If the defect notification unit 230 is an LED, "green" light is emitted in standby mode, "red" light is emitted in monitoring mode, and "yellow" light is emitted or blinks in the case of a warning or an error. In particular, when the first event (C) occurs, the LED blinks in red once per second, when the second event (D) occurs, red blinks twice per second, and when the third event (E) occurs After it occurs, red flashes 3 times per second. That is, as the area calculated in [Equation 1] increases, the blinking cycle is kept short so that fast blinking is achieved.

Therefore, the user can recognize that it is abnormal by recognizing red flashing, and can recognize that vibration has been high for a long time through the flashing cycle. This allows users to take immediate action.

Detailed descriptions of the preferred embodiments of the present invention disclosed as described above are provided to enable those skilled in the art to implement and practice the present invention. Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art will understand that the present invention can be variously modified and changed without departing from the scope of the present invention. For example, those skilled in the art can use each configuration described in the above-described embodiments in a manner of combining with each other. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The present invention may be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention. Accordingly, the above detailed description should not be construed as limiting in all respects and should be considered as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention. The invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. In addition, claims that do not have an explicit citation relationship in the claims may be combined to form an embodiment or may be included as new claims by amendment after filing.

2: satellite,
3: land control server,
5: ship,
5a: other vessels;
10: smart sensor,
10a: main smart sensor,
10b: sub smart sensor,
20: attachment part,
25: curved portion,
30: engine,
100: sensor unit,
110: acoustic sensor,
120: vibration sensor,
130: signal processing unit,
140: time data file generation unit,
150: sensor data storage unit,
160: sensor communication unit,
170: terminal part,
180: power generation unit,
190: sensor power unit,
200: sensor control unit,
210: trigger generating unit,
220: trigger receiving unit,
230: defect alarm unit,
300: AP unit,
310: AP control unit,
320: AP Communications Department,
330: standby monitoring unit,
340: AP power unit,
350: server communication unit,
360: AP display unit,
370: AP storage unit,
380: AP input unit,
1300: server device,
1310: server control unit,
1320: satellite communication department,
1330: storage unit,
1340: display,
1350: server signal processing unit,
1360: FFT unit,
1370: database unit,
1380: alarm unit,
1390: gateway,
A: first threshold,
B: second threshold,
C: 1st event detection,
D: second event detection,
E: third event detection,
S1: first critical area,
S2: Second critical area.

Claims (13)

A sensor for measuring vibration or noise of a ship,
A sensor unit for measuring vibration or noise of the ship;
a time data file generation unit generating a time domain data file based on the measurement signal of the sensor unit;
a sensor communication unit transmitting the time domain data file to an AP unit and receiving a control command from the AP unit;
a sensor power supply unit supplying power necessary for the operation of the sensor;
a trigger generating unit generating a trigger signal when the measurement signal exceeds a threshold value;
a trigger receiving unit controlling the sensor power unit based on a trigger signal received from the outside; and
A smart sensor having a standby mode, characterized in that it comprises a sensor control unit for operating in one of a monitoring mode in which the sensor is activated and a standby mode in which the sensor is inactivated. According to claim 1,
Further comprising a power generation unit for generating power based on the vibration,
The power produced by the power generation unit is a smart sensor having a standby mode, characterized in that charged to the sensor power unit. According to claim 2,
Smart sensor having a standby mode, characterized in that the trigger generating unit generates the trigger signal when the produced power exceeds a predetermined power threshold. According to claim 1,
In the case of the monitoring mode,
The sensor unit, the time data file generation unit, the sensor communication unit, the trigger generating unit, and the trigger receiving unit from the sensor power unit; And Smart sensor having a standby mode, characterized in that the power is supplied to the sensor control unit. According to claim 1,
In the case of the standby mode,
Power is supplied from the sensor power supply unit to the trigger receiving unit and the sensor communication unit,
the sensor unit, the time data file generation unit, and the trigger generation unit; And Smart sensor having a standby mode, characterized in that the power supplied to the sensor control unit is cut off. According to claim 1,
The threshold value is a smart sensor having a standby mode, characterized in that the critical amplitude in the time domain or the critical frequency or critical frequency band in the frequency domain. According to claim 1,
In the monitoring mode, the trigger generating unit is activated, the trigger receiving unit is deactivated, and
Smart sensor having a standby mode, characterized in that in the standby mode, the trigger generating unit is deactivated, and the trigger receiving unit is activated. Equipped with a plurality of smart sensors according to any one of claims 1 to 7,
Includes an AP unit connected to a plurality of the smart sensors,
The AP unit,
A sensor communication unit capable of data communication with the smart sensor;
A server communication unit capable of data communication with the server device;
an AP power supply unit supplying power necessary for the operation of the AP unit;
a standby monitoring unit receiving a trigger signal from the smart sensor and transmitting the trigger signal to the smart sensor; and
Vibration and noise measuring device of a ship using a smart sensor, characterized in that it comprises a; AP control unit for operating in one of the monitoring mode in which the AP unit is activated and the standby mode in which the AP unit is inactivated. According to claim 8,
The plurality of smart sensors include one main smart sensor operating in a monitoring mode,
The vibration and noise measuring device of a ship using a smart sensor, characterized in that the smart sensors other than the main smart sensor are sub smart sensors operating in standby mode. According to claim 8,
In the case of the standby mode,
Ship vibration and noise measuring device using a smart sensor, characterized in that power is supplied from the AP power supply to the standby monitoring unit and the sensor communication unit. In the vibration noise measuring method of a ship using the vibration noise measuring device according to claim 8,
(i-1) AP unit confirming the communication connection of a plurality of smart sensors connected to the AP unit (S120); and
(i-2) operating a main smart sensor among the plurality of smart sensors in a monitoring mode, and operating the AP unit and sub smart sensors in a standby mode (S140);
(ii) generating a trigger signal by a trigger generating unit when the main smart sensor detects vibration or noise exceeding a threshold (S200);
(iii-1) converting the AP unit into a monitoring mode by receiving the trigger signal (S320);
(iii-2) switching the sub smart sensor to a monitoring mode by transmitting the trigger signal to the sub smart sensor by the AP unit (S340);
(iii-3) measuring vibration or noise by the main smart sensor and the sub smart sensor (S360);
(iii-4) the main smart sensor and the sub smart sensor transmitting measurement data to the AP unit (S370); and
(iii-5) transmitting the measurement data to the server device by the AP unit (S380); a method for measuring vibration and noise of a ship, characterized in that it includes. According to claim 11,
After the transmission step (S380) to the server device, the vibration and noise measurement method of the ship, characterized in that it is executed again from the communication connection confirmation step (S120). A ship having a vibration and noise measuring device according to claim 8.

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