JP5567241B1 - Monitoring device and monitoring system - Google Patents

Abstract

A planar strain detector 11 that generates a voltage in accordance with the magnitude of strain caused by the movement of a person, and an electrode portion 12 having a first electrode surface and a second electrode surface provided on the strain detector 11 in an overlapping manner. And a position detection unit 261 for detecting a position where the strain is generated based on a resistance value between the first electrode surface and the second electrode surface, The voltage information indicating the voltage generated by the strain detection unit 11 and the information generation unit 262 generating position information indicating the position detected by the position detection unit 261, and the voltage information and the position information at predetermined time intervals. And a communication unit 27 that transmits the position information to the management device 3 for managing the position information, and the monitoring device that improves the detection accuracy of the human state.

Description

  The present invention relates to a monitoring device and a monitoring system for monitoring the condition of a person lying on a bed.

  In facilities such as nursing homes and hospitals, it is necessary to respond quickly when a sudden change occurs in a person sleeping in a bed. Based on such a need, for example, Patent Document 1 discloses a system for monitoring biological information such as a heart rate and a respiratory rate of a person lying on a bed. In conventional systems, sensors that detect pulsations and beats and generate signal waveforms are provided at multiple positions such as the head, chest, and abdomen, and the respiratory rate and heart rate are measured using each sensor. Is done.

JP 2010-284498 A

  By the way, it is important to take good quality sleep in order to maintain and improve the health of people living in nursing homes and to increase the therapeutic effects of those who are being treated in hospitals. As described above, in nursing care facilities and hospitals, it is required to monitor the state of a person lying on a bed and living with higher accuracy. With conventional systems, heart rate and respiratory rate can be measured, but with conventional systems, it is necessary to consider not only heart rate and respiratory rate, but also body movement, such as sleep quality. It was difficult to get some information.

  Then, this invention is made | formed in view of these points, and it aims at enabling it to grasp | ascertain the state of the person who is sleeping from multiple aspects.

  A monitoring device according to a first aspect of the present invention includes a planar strain detector that generates a voltage according to the magnitude of strain caused by a person's movement, and a first that is provided so as to overlap the strain detector. An electrode portion having an electrode surface and a second electrode surface, a position detection unit for detecting a position where the strain is generated based on a resistance value between the first electrode surface and the second electrode surface, and the strain Voltage information indicating the voltage generated by the detection unit, information generation unit that generates monitoring information based on position information indicating the position detected by the position detection unit, and the voltage information at a predetermined time interval. And a communication unit that transmits the management information to the management device that manages the position information. The strain detection unit and the electrode unit have, for example, a comb shape or a meandering shape.

  The monitoring device includes a filter unit that removes a frequency component generated by a motion other than the motion related to the biological information from the voltage generated by the distortion detection unit according to the type of the biological information included in the monitoring information. Further, it may be provided.

  The information generation unit may cause the communication unit to transmit the monitoring information at a timing when at least one of the voltage information and the position information satisfies a first condition. In this case, the information generation unit acquires the first condition from, for example, the management device. The information generation unit may generate alarm information when the voltage detected by the strain detection unit satisfies a second condition, and the communication unit may transmit the alarm information to the management device. Good.

  A monitoring system according to a second aspect of the present invention is a monitoring system comprising the monitoring device described above and a management device that manages the monitoring information received from the monitoring device, wherein the management device includes the monitoring device. Based on the information, a state information generating unit that generates state information indicating the state of the person, and a communication unit that transmits the state information generated by the state information generating unit to an information terminal connected via a communication line And comprising.

  The management device includes a reception unit that receives a condition for the monitoring device to transmit information indicating an abnormal state of at least one of the voltage information and the position information, and the communication unit receives the condition received by the reception unit. The information may be transmitted to the monitoring device, and the monitoring device may transmit information indicating an abnormal state to the management device when at least one of the voltage information and the position information satisfies the condition.

  In addition, the management device includes a reception unit that receives a condition for the communication unit to transmit the state information to the information terminal, and the communication unit includes at least one of the voltage information and the position information included in the monitoring information. However, when the conditions received by the receiving unit are satisfied, the state information may be transmitted to the information terminal.

  According to the present invention, there is an effect that the state of a sleeping person can be grasped in a multifaceted manner.

It is a figure which shows the structure of the monitoring system which concerns on this embodiment. It is a plane perspective view of a monitoring device. It is sectional drawing of a strain sensor. It is a figure which shows the structure of a controller. It is a figure for demonstrating the principle which pinpoints the position which distortion generate | occur | produced. It is a figure which shows the structure of a management server. It is a figure which shows the software structure of an information terminal. It is a figure which shows the example of the status information displayed on an information terminal. It is a figure which shows the example of the status information displayed on an information terminal. It is a figure which shows an example of the operation | movement sequence of a monitoring system. It is a figure which shows the operation | movement sequence when abnormality generate | occur | produces.

<First Embodiment>
[Overview of monitoring system S]
FIG. 1 is a diagram illustrating a configuration of a monitoring system S according to the present embodiment.
The monitoring system S includes a monitoring device 1 and a management server 3. The monitoring device 1 is a sheet-like device that monitors the state of a sleeping person, and is placed on the bed 2 and used. The person h whose condition is monitored sleeps on the bed 2 on which the monitoring device 1 is laid. The monitoring device 1 can transmit and receive data to and from the management server 3 via a wireless communication line W such as Wi-Fi or Bluetooth (registered trademark), a wireless access point 5, and a network 6 such as the Internet. Specifically, the monitoring device 1 operates based on instruction information transmitted from the management server 3. In addition, the monitoring device 1 generates information according to the detected person's state and transmits the information to the management server 3.

  The management server 3 manages monitoring information including biological information received from the monitoring device 1. Specifically, the management server 3 displays a heart rate, a respiratory rate, a body movement, a sleep state, and the like based on the monitoring information received from the monitoring device 1 and is connected to be communicable via the network 6. The information terminal 4 can be notified of heart rate, respiratory rate, body movement, sleep state, and the like.

  The information terminal 4 is an information terminal in which application software for controlling the monitoring device 1 and confirming the state of the person detected by the monitoring device 1 is installed. The information terminal 4 is a mobile terminal such as a smartphone or a tablet, for example. The information terminal 4 can transmit and receive data to and from the management server 3 and the monitoring device 1 via a communication line such as Wi-Fi or a mobile phone network and the network 6. The information terminal 4 can also control other electronic devices in the room / building where the monitoring device 1 is installed.

  In FIG. 1, a lighting 7 and a monitoring camera 8 are installed in a room where a bed 2 is provided. In order to monitor the person h, the user of the monitoring system S can adjust the illuminance of the illumination 7 or change the direction of the camera 8 by operating the application software of the information terminal 4.

  In FIG. 1, only the monitoring device 1 installed in one room is shown. However, the monitoring system S may include a plurality of monitoring devices 1, and one management server 3 includes a number of monitoring devices. 1 and information may be transmitted to and received from a large number of monitoring devices 1.

[Configuration of Monitoring Device 1]
FIG. 2 is a plan perspective view of the monitoring device 1. The monitoring device 1 includes a strain sensor 10 and a controller 20. The strain sensor 10 and the controller 20 are covered with a flexible external cover (not shown).

  The strain sensor 10 is a planar sensor that generates a voltage according to the magnitude of strain caused by human movement. The controller 20 controls the operation of the strain sensor 10 and converts an electrical signal output from the strain sensor 10 to generate information used for specifying the state of the person h. The controller 20 transmits the generated information to the management server 3 via the wireless communication line W or the like. The strain sensor 10 and the controller 20 are connected at a short distance without using a cable so as not to be affected by noise.

  FIG. 3 is a cross-sectional view of the strain sensor 10. As shown in FIG. 3, the strain sensor 10 includes a strain detection unit 11, and an electrode unit 12-1 and an electrode unit 12-2 provided on both surfaces of the strain detection unit 11.

  The strain detection unit 11 is a film-like plastic PVDF (PolyVinylidene DiFluoride) configured to include polyvinylidene fluoride having a piezoelectric effect. Since the cross-sectional area of the strain detection unit 11 is much smaller than the surface area, a large strain is generated according to a minute force generated in the Z direction orthogonal to the X direction and the Y direction shown in FIG. Therefore, the strain sensor 10 can generate a voltage according to a minute force generated by the heartbeat of the person h lying on the monitoring device 1.

  For example, when the thickness is 28 μm, the strain detector 11 generates a voltage of about 10 mV to 15 mV for a strain of 1 με. As an example, when a pulse is detected by the strain detector 11, a voltage of about 130 mVpp is output, and a dynamic strain of about 8 με can be detected.

  The electrode unit 12 outputs the voltage generated by the strain detection unit 11 to the controller 20. The electrode unit 12-1 is bonded to one surface of the strain detection unit 11, and the electrode unit 12-2 is bonded to the other surface. The electrode part 12 is comprised with metals, such as gold | metal | money or nickel.

  The strain detection unit 11, the electrode unit 12-1, and the electrode unit 12-2 have a structure as a capacitor, and the area of the region where the electrode unit 12-1 and the electrode unit 12-2 overlap is determined. If A is the thickness of the strain detector 11 and t is the dielectric constant of the strain detector 11, the capacitance is C = εA / t. When a resistance load having a resistance value R is connected to the end of the strain sensor 10, the strain sensor 10 functions as a high-pass filter, and the cutoff frequency is fc = 1 / 2πRC.

  The strain sensor 10 has a comb shape or a meandering shape in which the position in the Y direction changes as it proceeds in the X direction shown in FIG. Since the strain sensor 10 has the comb shape or the meandering shape as described above, the area of the strain sensor 10 can be reduced, so that the cost can be reduced. Further, since the strain sensor 10 has a comb shape or a meandering shape as described above, the position where the heartbeat of the person h is detected can be detected with high accuracy. The principle of detecting the position of the person h by the strain sensor 10 will be described later. In FIG. 2, one strain sensor 10 is illustrated, but the monitoring device 1 may include a plurality of strain sensors 10.

Next, the configuration of the controller 20 will be described.
FIG. 4 is a diagram illustrating a configuration of the controller 20. The controller 20 includes an amplification unit 21, a filter unit 22, an A / D conversion unit 23, a resistance detection unit 24, a storage unit 25, a control unit 26, and a communication unit 27. These devices are mounted on a membrane substrate, for example.

  The amplifying unit 21 amplifies the voltage output from the strain sensor 10 according to the beat of the person h. The signal amplified by the amplifying unit 21 is input to the filter unit 22.

  The filter unit 22 amplifies the frequency component generated by the movement other than the movement related to the biological information in the amplification unit 21 according to the type of the biological information to be included in the monitoring information transmitted from the monitoring device 1 to the management server 3. To remove from the signal. For example, when transmitting the heart rate to the management server 3, the filter unit 22 removes a frequency component generated by respiration.

  In general, the movement of the chest wall of the person h is a periodic signal having a period of about 4 seconds, and the heartbeat is a periodic signal having a period of about 1 second. Therefore, in order to remove the respiratory signal and noise, it is preferable to set the lower limit frequency of the frequency band that can be passed by the filter unit 22 to 1 Hz and the upper limit frequency to 10 Hz. The filter unit 22 may include a plurality of filters each having a different pass frequency band, and each filter may extract frequency components corresponding to different biological information from the signal amplified in the amplification unit 21.

  The A / D converter 23 digitally converts the voltage signal from which unnecessary frequency components have been removed by the filter unit 22. The A / D conversion unit 23 performs digital conversion with a resolution of, for example, about 256 to 512 gradations.

  The resistance detection unit 24 detects a resistance value between the electrode unit 12-1 and the electrode unit 12-2. For example, the resistance detection unit 24 detects a current and a voltage flowing between the electrode unit 12-1 and the electrode unit 12-2, and detects the resistance value by dividing the voltage by the current.

  The storage unit 25 includes a ROM and a RAM. The storage unit 25 stores a program for operating the control unit 26. The storage unit 25 temporarily stores the voltage signal digitized by the A / D conversion unit 23.

  The control unit 26 is a CPU, for example, and comprehensively controls the functions of the controller 20. The controller 20 functions as a position detection unit 261 and an information generation unit 262.

  The position detection unit 261 detects a position where distortion has occurred based on the resistance value between the electrode unit 12-1 and the electrode unit 12-2. Specifically, the position detection unit 261 generates distortion in the strain sensor 10 using the resistance value detected by the resistance detection unit 24 and the later-described position specifying information stored in the resistance detection unit 24 in advance. Identify the location.

  FIG. 5 is a diagram for explaining the principle of identifying the position where distortion has occurred. FIG. 5B shows an equivalent circuit in the case where distortion occurs at the position A in FIG. FIG. 5C shows an equivalent circuit when distortion occurs at position B in FIG.

  As shown in FIGS. 5B and 5C, the strain sensor 10 has a series resistance component that increases in accordance with the distance from the filter unit 22. Further, in the strain sensor 10, the resistance between the electrode portion 12-1 and the electrode portion 12-2 is reduced at the position where the strain is generated. Comparing FIG. 5B and FIG. 5C, the resistance value when the distortion occurs at the position A where the distance from the filter unit 22 is L1 is the resistance value at the position B where the distance from the filter unit 22 is L2. It is larger than the resistance value when distortion occurs.

  Therefore, the relationship between the distance from the filter unit 22 to the position where the distortion has occurred and the resistance value is measured in advance, and position specifying information indicating the relationship between the distance and the resistance value is stored in the resistance detection unit 24. Thus, the filter unit 22 can specify the distance from the filter unit 22 to the position where the distortion occurs using the position specifying information. The position specifying information may include information indicating the relationship between the XY coordinate value and the resistance value in the monitoring device 1. Note that the distance from the filter unit 22 to the position where the distortion is generated is not a linear distance between the filter unit 22 and the position where the distortion is generated, but a distance along the comb-shaped or meandering strain sensor 10.

  For example, when the resistance value detected by the filter unit 22 is 100Ω or more and less than 105Ω, the filter unit 22 has a distance of 100 cm to the position where the distortion occurs, and the position where the distortion occurs corresponds to the position A corresponding to the distance 100 cm. To be identified. When the resistance value detected by the filter unit 22 is 50Ω or more and less than 55Ω, the filter unit 22 has a distance of 30 cm to the position where the distortion occurs, and the position where the distortion occurs is a position B corresponding to the distance of 30 cm. Is identified.

  Returning to FIG. 4, the information generation unit 262 generates monitoring information based on the voltage information indicating the voltage generated by the strain detection unit 11 and the position information indicating the position detected by the position detection unit 261. Specifically, the information generation unit 262 generates voltage information in which information indicating the voltage value digitized by the A / D conversion unit 23 is associated with time. In addition, the information generation unit 262 generates position information indicating the coordinates of the position at the timing when the voltage corresponding to the voltage information is detected.

The information generation unit 262 generates monitoring information by assembling voltage information and position information indicating the detected voltage and position into packets every predetermined time (for example, 500 milliseconds). The information generation unit 262 puts identification information unique to the monitoring device 1 in the header of the assembled packet. When the monitoring information includes identification information unique to the monitoring device 1, the management server 3 associates the monitoring device 1 with the monitoring device 1 when managing the monitoring information received from the plurality of monitoring devices 1. Monitoring information can be managed.

  The information generation unit 262 may digitize the heart rate, the respiratory rate, the sleep time, and the sleep quality based on the voltage information and the position information, and may generate monitoring information including the digitized information. For example, the information generation unit 262 has at least one of the heart rate and the respiration rate detected based on the voltage information smaller than a predetermined value, and the position information indicates that the movement of the person h is within a predetermined range. If it indicates that, the numerical information indicating that the quality of sleep is high is generated. If at least one of the heart rate and the respiratory rate detected based on the voltage information is greater than a predetermined value, or if the position information indicates that the person h is moving frequently, sleep Numerical information indicating that the quality of the image is low is generated. Moreover, the information generation part 262 produces | generates the numerical information which shows sleep time as time when the quality of sleep satisfy | filled the predetermined condition.

  The communication unit 27 transmits the monitoring information generated by the information generation unit 262 to the management server 3 at a predetermined time interval based on the control of the information generation unit 262. For example, the communication unit 27 transmits monitoring information to the management server 3 at a time interval corresponding to the maximum packet length specified by the wireless communication protocol. The communication unit 27 includes, for example, a Wi-Fi or Bluetooth high-frequency module, and transmits radio waves including monitoring information.

  The information generation unit 262 may control the time interval at which the monitoring information is transmitted to the transmission unit 27 based on the voltage detected by the strain detection unit 11 and the position detected by the position detection unit 261. For example, when the voltage and position are within a predetermined range indicating a normal state, the information generation unit 262 causes the transmission unit 27 to transmit monitoring information at the first time interval. When either one of the voltage and the position is within a predetermined range indicating an abnormal state, the information generation unit 262 causes the monitoring information to be transmitted at a second time interval shorter than the first time interval. When both the voltage and the position are within a predetermined range indicating an abnormal state, the information generation unit 262 causes the monitoring information to be transmitted at a third time interval shorter than the second time interval.

  The information generation unit 262 causes the transmission unit 27 to transmit the monitoring information at a timing when at least one of the voltage information and the position information satisfies a predetermined condition specified by the management server 3 or the information terminal 4, for example. Also good. For example, when the voltage output from the strain sensor 10 indicates an abnormal value, the information generation unit 262 sends monitoring information including position information corresponding to the position detected by the position detection unit 261 to the transmission unit 27 at that timing. It may be transmitted.

  Specifically, the information generation unit 262 determines whether the position detection unit 261 has the position detection unit 261 based on the resistance value at the timing when the voltage corresponding to the voltage information indicating an abnormal value such as greater than a predetermined threshold is output from the strain sensor 10. Position information corresponding to the detected position is generated, and a packet including the position information is assembled. When the communication unit 27 transmits such a packet to the management server 3, the management server 3 can easily identify the movement and position of the person h when an abnormality occurs. Even if the abnormal state such that the voltage waveform is not output due to the failure of the strain detecting unit 11 is shown, it is found that the person h is moving according to the position information. Information can be prevented from being transmitted.

  The information generation unit 262 may generate alarm information when a predetermined condition is satisfied such that the voltage detected by the strain detection unit 11 indicates an abnormal value. For example, when the period of the voltage waveform is smaller than a predetermined period, or when the amplitude of the voltage waveform is smaller than a predetermined value, the risk of heartbeat stop is high, so the information generation unit 262 generates alarm information, and the communication unit The alarm information is transmitted to the management server 3 via 27.

  The information generation unit 262 may generate alarm information when the position detected by the position detection unit 261 indicates an abnormal position. For example, when the position detected by the position detection unit 261 corresponds to the end of the bed 2, it is considered that there is a risk that the person h falls. Therefore, the monitoring device 1 can notify the management server 3 or the information terminal 4 that the position is abnormal, thereby preventing troubles such as dropping.

  The information generation unit 262 may transmit alarm information when the voltage detected by the strain detection unit 11 satisfies a predetermined condition and the position detected by the position detection unit 261 satisfies the predetermined condition. For example, even if the voltage information indicates an abnormal state, the information generation unit 262 generates alarm information when the movement of the person h grasped based on the position information is in a normal state. You don't have to. By doing so, it is possible to prevent the alarm information from being erroneously transmitted when an abnormality occurs in the voltage due to the failure of the strain sensor 10.

  Conditions for the information generating unit 262 to cause the transmitting unit 27 to transmit alarm information can be set for each person h whose state is to be monitored. Specifically, the person who monitors the person h detects the amplitude value, period, waveform, and voltage waveform of the voltage waveform that is a condition for transmitting alarm information on the operation screen of the management server 3 or the information terminal 4. A range of can be specified. Hereinafter, the configuration of the management server 3 and the information terminal 4 will be described.

[Configuration of Management Server 3]
FIG. 6 is a diagram illustrating the configuration of the management server 3. The management server 3 includes a storage unit 31, a communication unit 32, and a control unit 33. The storage unit 31 includes a storage medium such as a ROM, a RAM, and a hard disk, and stores programs executed by the communication unit 32 and various types of information received from the monitoring device 1.

  The communication unit 32 includes a communication controller that transmits and receives data between the monitoring device 1 and the information terminal 4. The communication unit 32 is a LAN controller, for example.

  The control unit 33 is configured by a CPU, for example, and comprehensively controls each unit of the management server 3. The control unit 33 functions as a state information generation unit 331 and a reception unit 332 by executing a program stored in the storage unit 31.

  The state information generation unit 331 generates state information indicating a person's state based on the monitoring information received from the monitoring device 1. The status information includes, for example, heart rate and respiratory rate specified based on voltage information, or sleep quality information specified based on voltage information and position information. The state information generated by the state information generation unit 331 is transmitted to the information terminal 4 via the communication unit 32. The management server 3 may include a display, and the state information generated by the state information generation unit 331 may be displayed on the display.

The receiving unit 332 receives a condition for the monitoring device 1 to transmit information indicating an abnormal state of at least one of voltage information and position information to the management server 3. The communication unit 32 transmits the conditions received by the receiving unit 332 to the monitoring device 1.
In addition, the reception unit 332 receives a condition for the communication unit 32 to transmit state information to the information terminal 4. In this case, the communication unit 32 transmits the state information to the information terminal 4 when at least one of the voltage information and the position information satisfies the condition received by the receiving unit 322.

  The communication unit 32 may transmit state information indicating an abnormal state when the voltage information and the position information indicate an abnormal value, or when the voltage information and the position information cannot be received from the monitoring device 1 for a predetermined time. Good. In this case, the communication unit 32 may transmit state information including voice information together with text information, and alert the user of the information terminal 4 by voice.

[Configuration of information terminal 4]
FIG. 7 is a diagram illustrating a software configuration of the information terminal 4. The information terminal 4 can operate various application software such as a biological information monitoring application 41, a lighting control application 42, a video display application 43, and an interphone application 44. The biological information monitoring application 41 is used to display biological information such as a heart rate, a respiratory rate, and a sleep state detected by the monitoring device 1 and to input setting values for controlling the operation of the monitoring device 1. It is done.

  The lighting control application 42 is used to control the lighting 7 in the room where the monitoring device 1 is used. The user can turn on / off the illumination 7 and adjust the illuminance by using the illumination control application 42.

  The video display application 43 is used to control the network 6 installed in the room where the monitoring device 1 is used. The user can visually recognize the state of the person h lying on the monitoring device 1 by using the video display application 43. For example, when the biological information monitoring application 41 receives state information indicating an abnormal state from the management server 3, the information terminal 4 automatically activates the video display application 43 so that the user of the information terminal 4 can promptly The state of the person h may be visible. Furthermore, when the information terminal 4 receives state information indicating an abnormal state from the management server 3, the information terminal 4 automatically starts the lighting control application 42 together with the video display application 43, and the user of the information terminal 4 The illuminance may be adjusted quickly.

  8 and 9 are diagrams illustrating examples of state information displayed on the information terminal 4. In FIG. 8, sleep quality, sleep time, heart rate / minute, respiration rate / minute, room temperature / humidity are displayed. The quality of sleep and the sleep time are information created in at least one of the monitoring device 1, the management server 3, and the information terminal 4 based on the voltage information and the position information generated by the information generation unit 262.

  The information terminal 4 may display the sleep time corresponding to the quality of sleep. The sleep state display area 411 in FIG. 8 shows the quality of sleep at each time. The sleep state display area 411 includes a plurality of images having colors and shapes according to the quality of sleep. For example, a white image indicates a time zone in which the quality of sleep is higher than a predetermined quality, and a black image indicates a time zone in which the quality of sleep is lower than the predetermined quality. The user of the information terminal 4 can easily understand the sleep state of the person h by looking at the sleep state display area 411.

  FIG. 9 lists changes in heart rate, respiratory rate, sleep quality, room brightness, temperature, and humidity over time. The user of the information terminal 4 can easily understand the relationship between the room environment and the state of the person h by looking at the display of FIG. For example, if the user can grasp the tendency that the quality of sleep tends to deteriorate or the heart rate is likely to occur abnormally in a time zone where humidity is low, the environmental condition of the time zone when the quality of sleep is high It can be adjusted to match.

[Operation sequence of monitoring system S]
FIG. 10 is a diagram illustrating an example of an operation sequence of the monitoring system S.
First, the information terminal 4 accepts a setting of a condition for receiving information indicating the state of the person h detected by the monitoring device 1 (S1). The information terminal 4 transmits condition setting information to the management server 3 when receiving the condition input by the user. The management server 3 stores the condition setting information received from the information terminal 4 in the storage unit 31 (S2). Further, the management server 3 transmits the condition setting information to the monitoring device 1. The monitoring device 1 stores the received condition setting information in the storage unit 25.

  Subsequently, when the information terminal 4 receives an instruction to start measurement by the monitoring device 1 from the user (S4), the information terminal 4 transmits a measurement start instruction to the management server 3. When receiving the measurement start instruction from the information terminal 4, the management server 3 transmits the measurement start instruction to the monitoring device 1. The information terminal 4 may directly transmit a measurement start instruction to the monitoring device 1 without going through the management server 3.

  Upon receiving the measurement start instruction, the monitoring device 1 starts the operation of the strain sensor 10, and based on the voltage signal output from the strain sensor 10 and the resistance value detected by the resistance detection unit 24, the voltage information and voltage Information is generated and transmitted to the management server 3 (S5).

  Subsequently, when the biological information monitoring application software is activated in the information terminal 4, the information terminal 4 transmits a status information request to the management server 3. When the management server 3 receives the status information request from the information terminal 4, the management server 3 generates status information indicating the heart rate, the respiratory rate, the quality of sleep, and the like based on the voltage information and the position information received thereafter. 4 to send.

  When the information terminal 4 receives an instruction to end the measurement from the user (S7), the information terminal 4 transmits a measurement end instruction to the management server 3. When receiving the measurement end instruction, the management server 3 transmits the measurement end instruction to the monitoring device 1. When the monitoring device 1 receives the measurement end instruction, the monitoring device 1 ends the measurement.

  FIG. 11 is a diagram illustrating an operation sequence when an abnormality occurs. The monitoring device 1 generates voltage information and position information (S11), and when the generated voltage information and position information do not satisfy the conditions for warning, the monitoring device 1 sends a voltage to the management server 3. Send information and location information. In addition, when the generated voltage information and position information satisfy the conditions for warning, the monitoring device 1 transmits warning information to the management server 3. When receiving the warning information, the management server 3 displays a warning on the display (S12) and transmits the warning information to the information terminal 4 registered in advance. The information terminal 4 that has received the warning information displays a warning (S13). The monitoring device 1 transmits voltage information and position information together with the warning information, and the management server 3 and the information terminal 4 display information such as the heart rate generated based on the voltage information and position information together with the warning information. May be.

[Effect in the first embodiment]
As described above, according to the monitoring system S according to the present embodiment, the monitoring device 1 generates the voltage information and the position information based on the voltage generated according to the strain applied to the strain sensor 10, and the management server 3 Send to. Therefore, a user who uses the monitoring system S has many aspects such as sleep time estimated using changes in the position of the person h, sleep quality, and biological information such as the heart rate and respiration rate of the person h during sleep. Based on such information, the state of the person h can be monitored with high accuracy.

  In the management server 3, the voltage information and the position information transmitted from the monitoring device 1 are accumulated in association with time, so that it is possible to analyze the tendency and change of the state of the person whose state is to be monitored. become.

  Further, since the monitoring device 1 can be controlled by operating the information terminal 4 and the heart rate, respiratory rate and sleep state of the person to be monitored can be displayed, the room where the monitoring device 1 is installed Even at a distant place, the state of the person h can be monitored in real time.

<Second Embodiment>
In the first embodiment, the configuration in which the filter unit 22 extracts a predetermined frequency component from the voltage amplified by the amplifying unit 21 and then digitizes it in the A / D conversion unit 23 has been described. The second embodiment is different in that the filter unit 22 is provided after the A / D conversion unit 23 and is configured as a digital filter having a variable pass frequency band, and is the same in other points. .

  The filter unit 22 can switch the pass frequency band under the control of the control unit 26. When the monitoring device 1 generates monitoring information including the biological information of the type selected by the management server 3, the monitoring device 1 switches the pass frequency band of the filter unit 22 according to the selected type, so that the selected type corresponds to the selected type. It is possible to extract only signals having different frequencies.

  For example, when the monitoring device 1 needs to transmit the biological information indicating the heart rate and the monitoring information including the biological information indicating the respiration rate to the management server 3, the filter unit 22 switches the pass frequency band in a time division manner. The filter unit 22 first extracts a frequency component based on the heartbeat with the filter unit 22 set in the first pass frequency band, and then breathes in a state where the filter unit 22 is set in the second pass frequency band. Voltage information is generated by extracting frequency components based on the above.

  The information generation unit 262 generates monitoring information including voltage information associated with each of a plurality of pieces of biological information such as heart rate and respiration rate. In this way, a plurality of biological information waveforms can be transmitted to the management server 3.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

  For example, in the above embodiment, the configuration in which the management server 3 generates the state information has been described. However, the management device 1 may generate the state information and transmit it to the management server 3 or the information terminal 4.

DESCRIPTION OF SYMBOLS 1 Monitoring apparatus 2 Bed 3 Management server 4 Information terminal 5 Wireless access point 6 Network 7 Illumination 8 Camera 10 Strain sensor 11 Strain detection part 12 Electrode part 20 Controller 21 Amplification part 22 Filter part 23 Conversion part 24 Resistance detection part 25 Storage part 26 Control unit 27 Communication unit 31 Storage unit 32 Communication unit 33 Control unit 41 Biological information monitoring application 42 Illumination control application 43 Video display application 44 Interphone application 261 Position detection unit 262 Information generation unit 331 State information generation unit 332 Reception unit 411 Sleep state display Area S monitoring system

Claims (8)

A monitoring device that monitors the state of a sleeping person,
A planar strain detector that generates a voltage according to the magnitude of strain caused by the movement of the person;
An electrode portion having a first electrode surface and a second electrode surface provided to overlap the strain detection portion;
A position detection unit that detects a position where the distortion occurs based on a resistance value between the first electrode surface and the second electrode surface;
An information generation unit that generates monitoring information based on voltage information indicating the voltage generated by the strain detection unit and position information indicating a position detected by the position detection unit;
A communication unit that transmits the monitoring information at a predetermined time interval to a management device that manages the voltage information and the position information;
A monitoring device comprising: The strain detection unit and the electrode unit have a comb shape or a meandering shape,
The monitoring apparatus according to claim 1. According to the type of biometric information included in the monitoring information, further includes a filter unit that removes a frequency component generated by a motion other than the motion related to the biometric information from the voltage generated by the strain detection unit,
The monitoring device according to claim 1 or 2. The information generation unit causes the communication unit to transmit the monitoring information at a timing when at least one of the voltage information and the position information satisfies a first condition;
The monitoring apparatus according to any one of claims 1 to 3. The information generation unit acquires the first condition from the management device;
The monitoring device according to claim 4. A monitoring device according to any one of claims 1 to 5;
A management device that manages the monitoring information received from the monitoring device;
A monitoring system comprising:
The management device
A state information generating unit that generates state information indicating the state of the person based on the monitoring information;
A communication unit that transmits the state information generated by the state information generation unit to an information terminal connected via a communication line;
A monitoring system comprising: The management device
The monitoring device further includes a receiving unit that receives a condition for transmitting information indicating an abnormal state of at least one of the voltage information and the position information,
The communication unit transmits the condition received by the receiving unit to the monitoring device;
The monitoring device transmits information indicating an abnormal state to the management device when at least one of the voltage information and the position information satisfies the condition;
The monitoring system according to claim 6. The management device
The communication unit further includes a reception unit that receives a condition for transmitting the state information to the information terminal,
The communication unit transmits the state information to the information terminal when at least one of the voltage information and the position information satisfies a condition received by the receiving unit.
The monitoring system according to claim 6.

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