JP6489238B2 - Electronic equipment and movement detection program - Google Patents

Description

  The present invention relates to an electronic device and a movement detection program.

  In recent years, changes in atmospheric pressure have been measured using a wearable device or a smart phone with a built-in atmospheric pressure sensor. Further, for example, a GPS (Global Positioning System) receiver is built in a smartphone, and altitude is measured based on GPS information. However, it is difficult to receive GPS radio waves in valleys of buildings or indoors, and it has been proposed to use a barometric sensor to measure vertical movement in such places. For example, by using an atmospheric pressure sensor, it is possible to detect a change in the vertical direction such as stair climbing or moving by an elevator.

JP 2012-237719 A Special table 2015-514201 gazette

  However, the atmospheric pressure sensor is easily affected by the environment such as the weather or opening / closing of a door in a closed room. In addition, since the accuracy of the atmospheric pressure sensor itself includes an error of about ± 1 m, when detecting a change in the vertical direction, it is possible to distinguish whether it is a pressure change due to noise or a pressure change due to a vertical change. difficult. On the other hand, it is conceivable to detect a change in the vertical direction based on the atmospheric pressure change amount for a predetermined time. At this time, when the predetermined time is long, not only a change in atmospheric pressure due to a change in the vertical direction but also a large slow change in atmospheric pressure caused by a change in the surrounding environment may be erroneously detected as a change in the vertical direction. When the predetermined time is short, a fine change in atmospheric pressure due to an error in the atmospheric pressure sensor itself may be erroneously detected as a change in the vertical direction. For this reason, it is difficult to increase accuracy when detecting movement in the vertical direction.

  In one aspect, the present invention is to provide an electronic device and a movement detection program that can improve the accuracy of movement detection.

  In one aspect, the electronic device includes an acquisition unit, a detection unit, and a determination unit. The acquisition unit acquires the atmospheric pressure value from the atmospheric pressure sensor. The detection unit calculates each atmospheric pressure change value in a plurality of time zones having different lengths and partially overlapping based on the acquired atmospheric pressure value, and calculates each atmospheric pressure change value to a predetermined threshold value Is detected in the vertical direction. The determination unit determines the state of the monitored person based on the detected vertical movement.

  The accuracy of movement detection can be increased.

FIG. 1 is a block diagram illustrating an example of the configuration of the movement detection system according to the embodiment. FIG. 2 is a diagram illustrating an example of the log storage unit. FIG. 3 is a diagram illustrating an example of a change in atmospheric pressure and a difference in atmospheric pressure. FIG. 4 is a diagram illustrating an example of a difference in characteristics depending on the time of the atmospheric pressure difference. FIG. 5 is a diagram illustrating an example of the influence due to the sensor error. FIG. 6 is a diagram illustrating an example of the influence of changes in the surrounding environment. FIG. 7 is a diagram illustrating an example of a pressure difference in the overturning operation. FIG. 8 is a diagram illustrating an example of a pressure difference in the sleeping operation. FIG. 9 is a diagram illustrating an example of an alert display. FIG. 10 is a diagram illustrating another example of the alert display. FIG. 11 is a flowchart illustrating an example of the movement detection process according to the embodiment. FIG. 12 is a flowchart illustrating an example of the detection process. FIG. 13 is a diagram illustrating an example of a computer that executes a movement detection program.

  Hereinafter, embodiments of an electronic device and a movement detection program disclosed in the present application will be described in detail based on the drawings. The disclosed technology is not limited by the present embodiment. Further, the following embodiments may be appropriately combined within a consistent range.

  FIG. 1 is a block diagram illustrating an example of the configuration of the movement detection system according to the embodiment. The movement detection system 1 illustrated in FIG. 1 includes a terminal device 10, a gateway device 100, and a server device 200. 1 shows an example in which the number of terminal devices 10 and gateway devices 100 is one, the number of terminal devices 10 and gateway devices 100 is not limited, and an arbitrary number of terminal devices 10 and gateway devices 100 may be used. You may have. The terminal device 10 is an example of an electronic device.

  The terminal device 10 and the gateway device 100 are connected so as to be able to communicate with each other via, for example, BLE (Bluetooth (registered trademark) Low Energy). Further, the gateway device 100 and the server device 200 are connected via a network N so that they can communicate with each other. As such a network N, any type of communication network such as the Internet, a LAN (Local Area Network), and a VPN (Virtual Private Network) can be adopted regardless of wired or wireless.

  The terminal device 10 is, for example, a computer worn by a monitored person whose state is to be monitored. The terminal device 10 is, for example, a wristwatch-type, badge-type, or tag-type terminal, and acquires data related to the monitored person. The monitored person is an on-site worker, for example. For example, the terminal device 10 acquires the atmospheric pressure value from the atmospheric pressure sensor in order to detect the movement of the monitored person in the vertical direction. The terminal device 10 calculates each atmospheric pressure change value in a plurality of time zones having different lengths and partially overlapping based on the acquired atmospheric pressure value, and each of the calculated atmospheric pressure change values is predetermined The movement in the vertical direction is detected by comparing with the threshold value. The terminal device 10 determines the state of the monitored person based on the detected vertical movement. In addition, the terminal device 10 transmits the determination result of the state of the monitored person to the server device 200 via the gateway device 100. Thereby, the terminal device 10 can improve the accuracy of movement detection.

  The gateway device 100 is, for example, a computer such as a smartphone or a relay station arranged in the vicinity of the monitored person wearing the terminal device 10. The gateway device 100 receives the determination result of the state of the monitored person from the terminal device 10 and the log data transmitted from the terminal device 10 at regular intervals. The gateway device 100 transmits the received determination result and log data to the server device 200 via the network N.

  The server device 200 is a computer that collects information of a person to be monitored who wears the terminal device 10 and transmits an alert to an administrator's terminal (not shown). The server device 200 receives the determination result and the log data from the terminal device 10 via the network N and the gateway device 100. For example, when the server apparatus 200 receives a determination result indicating that the monitored person has fallen, the server apparatus 200 transmits alert information to an administrator's terminal (not shown). In addition, when the server apparatus 200 receives log data, that is, information on a monitored person, the server apparatus 200 accumulates and stores the received log data.

  Next, the configuration of the terminal device 10 will be described. As illustrated in FIG. 1, the terminal device 10 includes a communication unit 11, an atmospheric pressure sensor 12, a switch 13, a storage unit 14, and a control unit 16. The terminal device 10 may include various functional units included in a known computer, for example, functional units such as various input devices and output devices, in addition to the functional units illustrated in FIG.

  The communication unit 11 is realized by a wireless communication module such as BLE, for example. The communication unit 11 is a communication interface that is wirelessly connected to the gateway apparatus 100 and manages information communication with the gateway apparatus 100. Note that the communication unit 11 may use a wireless communication module corresponding to a wireless LAN as a wireless communication module. The communication unit 11 transmits user information and the like input from the control unit 16 including the determination result of the state of the monitored person to the gateway device 100.

  The atmospheric pressure sensor 12 can be, for example, a capacitance type or vibration type atmospheric pressure sensor using MEMS (Micro Electro Mechanical Systems), and is a device that measures atmospheric pressure. The atmospheric pressure sensor 12 outputs the measured atmospheric pressure to the control unit 16 as an atmospheric pressure value.

  The switch 13 is a switch for turning on / off the movement detection function in the terminal device 10. That is, the switch 13 is a data acquisition request switch of the atmospheric pressure sensor 12. The switch 13 may be a mechanical switch or a switch displayed on a small display with a touch panel. The switch 13 outputs information indicating the ON / OFF state to the control unit 16.

  The storage unit 14 is realized by a storage device such as a semiconductor memory element such as a RAM (Random Access Memory) and a flash memory (Flash Memory), for example. The storage unit 14 includes a log storage unit 15. The storage unit 14 stores information used for processing in the control unit 16.

  The log storage unit 15 stores log data such as date and pressure values. FIG. 2 is a diagram illustrating an example of the log storage unit. As illustrated in FIG. 2, the log storage unit 15 includes items such as “date”, “time”, “atmospheric pressure value”, “X1”, “X2”, “X3”, and “falling”.

  “Date” is information indicating the date when the atmospheric pressure value was acquired. “Time” is information indicating the time when the atmospheric pressure value is acquired. “Atmospheric pressure value” is information indicating the acquired atmospheric pressure value. “X1” is information indicating the atmospheric pressure difference X1 between the atmospheric pressure value at the time tp and the atmospheric pressure value at the time t1 before the time difference T1 from the time tp when the time when the atmospheric pressure value is acquired is the time tp. . Similarly, “X2” is information indicating the atmospheric pressure difference X2 between the atmospheric pressure value at time tp and the atmospheric pressure value at time t2 that is a time difference T2 before time tp. Similarly, “X3” is information indicating the atmospheric pressure difference X3 between the atmospheric pressure value at the time tp and the atmospheric pressure value at the time t3 that is a time difference T3 before the time tp. “Falling” is information indicating the state of the monitored person. “Falling” is, for example, “1” when falling, “2” when lying down, and “0” when not falling and lying down.

  Here, the atmospheric pressure change and the atmospheric pressure difference will be described with reference to FIG. FIG. 3 is a diagram illustrating an example of a change in atmospheric pressure and a difference in atmospheric pressure. FIG. 3 is an example of a graph of atmospheric pressure change. In the example of FIG. 3, a pressure change value for a predetermined time in the pressure change graph, that is, a pressure difference is obtained. In the example of FIG. 3, time differences T1, T2, and T3 are set as the predetermined time. At this time, the relationship between the time differences is assumed to be T1> T2> T3.

  In the example of FIG. 3, when the current time is time tp, the time before time difference T1 is time t1, the time before time difference T2 is time t2, and the time before time difference T3 is time t3. The atmospheric pressure difference X1 corresponding to the time difference T1 can be obtained from the atmospheric pressure value at time tp-the atmospheric pressure value at time t1. The atmospheric pressure difference X2 corresponding to the time difference T2 can be obtained from the atmospheric pressure value at time tp-the atmospheric pressure value at time t2. The atmospheric pressure difference X3 corresponding to the time difference T3 can be obtained from the atmospheric pressure value at time tp-the atmospheric pressure value at time t3. The terminal device 10 detects vertical movement based on these pressure differences X1 to X3.

  The control unit 16 is realized, for example, by executing a program stored in an internal storage device using a RAM as a work area by a CPU (Central Processing Unit), an MPU (Micro Processing Unit), or the like. The control unit 16 may be realized by an integrated circuit such as an application specific integrated circuit (ASIC) or a field programmable gate array (FPGA). The control unit 16 includes an acquisition unit 17, a detection unit 18, a determination unit 19, and a communication control unit 20, and realizes or executes functions and operations of information processing described below. Note that the internal configuration of the control unit 16 is not limited to the configuration illustrated in FIG. 1, and may be another configuration as long as information processing described later is performed.

  Information indicating the ON / OFF state is input from the switch 13 to the acquisition unit 17. When the information indicating the ON state is input from the switch 13, the acquisition unit 17 receives the input information indicating the ON state. That is, the acquisition unit 17 receives the ON of the switch 13 corresponding to the data acquisition request of the atmospheric pressure sensor 12. When the acquisition unit 17 receives ON of the switch 13, the acquisition unit 17 starts acquiring the atmospheric pressure value from the atmospheric pressure sensor 12. The acquisition unit 17 outputs the acquired atmospheric pressure value to the detection unit 18. The acquisition unit 17 stores the acquired atmospheric pressure value in the log storage unit 15 in association with the date and time.

  Further, when an end check instruction is input from the determination unit 19 or the communication control unit 20 after the start of acquisition of the atmospheric pressure value, the acquisition unit 17 determines whether information indicating an OFF state is input from the switch 13. To do. That is, the acquisition unit 17 determines whether or not the switch 13 corresponding to the data acquisition request is OFF. If the switch 13 is not OFF, the acquisition unit 17 continuously outputs the acquired atmospheric pressure value to the detection unit 18. The acquisition part 17 complete | finishes a movement detection process, when the switch 13 is OFF.

  When the atmospheric pressure value is input from the acquisition unit 17, the detection unit 18 calculates each atmospheric pressure change value in a plurality of time zones having different lengths and partially overlapping based on the input atmospheric pressure value. To do. Here, the plurality of time zones having different lengths and partially overlapping are, for example, time differences T1 to T3 illustrated in FIG. Moreover, each atmospheric | air pressure change value is the atmospheric | air pressure difference X1-X3 shown in FIG. 3, for example. For example, the detection unit 18 sets time difference T1 = 2 seconds, time difference T2 = 1 second, and time difference T3 = 0.5 seconds. The current time is time tp.

  The detection unit 18 refers to the log storage unit 15 and calculates the atmospheric pressure difference X1 corresponding to the time difference T1 from the atmospheric pressure value at time tp-the atmospheric pressure value at time t1. Similarly, the detection unit 18 calculates the atmospheric pressure difference X2 corresponding to the time difference T2 from the atmospheric pressure value at time tp-the atmospheric pressure value at time t2. Similarly, the detection unit 18 calculates the atmospheric pressure difference X3 corresponding to the time difference T3 from the atmospheric pressure value at time tp-the atmospheric pressure value at time t3. The detection unit 18 stores the calculated atmospheric pressure differences X1 to X3 in the log storage unit 15.

  Here, the difference in characteristics depending on the time of the atmospheric pressure difference will be described with reference to FIG. FIG. 4 is a diagram illustrating an example of a difference in characteristics depending on the time of the atmospheric pressure difference. As shown in FIG. 4, the atmospheric pressure difference X <b> 1 having a large time difference has a merit that a vertical change (hereinafter also referred to as a height change) can be accurately detected. Further, the atmospheric pressure difference X1 is disadvantageous in that it is affected by atmospheric pressure changes due to the environment and that the speed of height change is difficult to understand. On the other hand, the atmospheric pressure difference X3 having a small time difference can be distinguished from a rapid height change and a slow height change as a merit. Further, the atmospheric pressure difference X3 has a disadvantage that there is an erroneous detection due to a sensor error.

  Next, the effects of sensor errors and changes in the surrounding environment will be described with reference to FIGS. FIG. 5 is a diagram illustrating an example of the influence due to the sensor error. FIG. 5 is a graph of atmospheric pressure at rest when the time difference T1 = 2 seconds and the time difference T3 = 0.5 seconds, for example. In the case of FIG. 5, in the graph of the time difference T3, noise is generated due to an error of the atmospheric pressure sensor 12, but in the graph of the time difference T1, no noise is generated.

  FIG. 6 is a diagram illustrating an example of the influence of changes in the surrounding environment. FIG. 6 is a graph of atmospheric pressure at rest when time difference T1 = 2 seconds and time difference T3 = 0.5 seconds, as in FIG. Note that the graph of FIG. 6 shows a longer time range than the graph of FIG. 5, and therefore the scales of FIG. 5 and FIG. 6 are different. In the case of FIG. 6, in the graph of the time difference T1, fluctuations in the atmospheric pressure due to changes in the surrounding environment have occurred, but in the graph of the time difference T3, fluctuations in atmospheric pressure due to changes in the surrounding environment have not occurred. That is, in the terminal device 10, by combining the atmospheric pressure differences having different time differences, it is possible to reduce the influence of noise and changes in the surrounding environment and reduce false detection.

  After calculating the atmospheric pressure differences X1 to X3, the detection unit 18 detects the movement in the vertical direction by comparing the atmospheric pressure differences X1 to X3 with a predetermined threshold value. That is, the detection unit 18 detects the movement in the vertical direction by comparing each calculated atmospheric pressure change value with a predetermined threshold value. For example, when the atmospheric pressure differences X1 to X3 are normalized by 100, the predetermined threshold value is 80 as the threshold value S1 corresponding to the atmospheric pressure difference X1, 50 as the threshold value S2 corresponding to the atmospheric pressure difference X2, and the threshold value corresponding to the atmospheric pressure difference X3. S3 can be set to 30.

  The detection unit 18 determines whether or not the atmospheric pressure difference X1 is larger than the threshold value S1. When the atmospheric pressure difference X1 is larger than the threshold value S1, the detection unit 18 determines whether or not the atmospheric pressure difference X2 is larger than the threshold value S2. When the atmospheric pressure difference X2 is larger than the threshold value S2, the detection unit 18 detects that there is a change in height and that there is a vertical movement. When the atmospheric pressure difference X1 is equal to or smaller than the threshold value S1, or when the atmospheric pressure difference X2 is equal to or smaller than the threshold value S2, the detection unit 18 detects that there is no height change, that is, there is no movement in the vertical direction. The detection unit 18 outputs the detection result of the vertical movement to the determination unit 19.

  Returning to the description of FIG. 1, the detection result is input from the detection unit 18 to the determination unit 19. The determination unit 19 refers to the log storage unit 15 to determine whether the input detection result has a height change, that is, whether there is a vertical movement. When the detection result indicates that there is no change in height, the determination unit 19 stores the determination result that there is no change in height in the log storage unit 15 and outputs an end check instruction to the acquisition unit 17.

  The determination part 19 determines whether the atmospheric | air pressure difference X3 is larger than threshold value S3, when a detection result has height change. The determination unit 19 determines that the monitored person has fallen when the atmospheric pressure difference X3 is greater than the threshold value S3. If the determination unit 19 determines that the monitored person has fallen, the determination unit 19 stores the determination result in the log storage unit 15 and outputs the determination result to the communication control unit 20.

  The determination part 19 determines with the to-be-monitored person having been in a supine position, when the conditions that the atmospheric | air pressure difference X3 is larger than threshold value S3 are not satisfy | filled. When the determination unit 19 determines that the person to be monitored is in a prone position, the determination unit 19 stores the determination result in the log storage unit 15 and outputs an end check instruction to the acquisition unit 17. That is, the determination unit 19 determines the state of the monitored person based on the vertical movement detected by the detection unit 18. Moreover, the determination part 19 determines so that the posture change and fall of a to-be-monitored person may be distinguished.

  When the determination result that the monitored person has fallen is input from the determination unit 19, the communication control unit 20 transmits the input determination result to the server device 200 via the communication unit 11 and the gateway device 100. . The communication control unit 20 transmits the user ID and time information of the monitored person together with the determination result to the server device 200 as user information. When the communication control unit 20 transmits the determination result to the server device 200, the communication control unit 20 outputs an end check instruction to the acquisition unit 17.

  In addition, the communication control unit 20 reads log data from the log storage unit 15 at a predetermined time interval, and transmits the read log data to the server device 200 via the communication unit 11 and the gateway device 100. The predetermined time interval can be, for example, 10 minutes.

  Here, the graphs in the fall and the recumbent position will be described with reference to FIGS. 7 and 8. FIG. 7 is a diagram illustrating an example of a pressure difference in the overturning operation. In the example of FIG. 7, since both the time differences T1 and T2 exceed the thresholds S1 and S2, it is determined that there is a height change. In addition, since the time difference T3 exceeds the threshold value S3, it is determined that the monitored person has fallen on the assumption that there is an instantaneous action.

  FIG. 8 is a diagram illustrating an example of a pressure difference in the sleeping operation. In contrast to FIG. 7, in the example of FIG. 8, since both of the time differences T1 and T2 exceed the thresholds S1 and S2, it is determined that there is a change in height. However, since the time difference T3 does not exceed the threshold value S3, it is determined that the action is to sleep, that is, the action of lying down. As shown in FIGS. 7 and 8, the terminal device 10 can distinguish between a fast height change and a slow height change, such as a fall and a sleeping operation.

  Also, alert information transmitted from the server device 200 that has received the determination result that the monitored person has fallen to an administrator terminal (not shown) will be described with reference to FIGS. 9 and 10. FIG. 9 is a diagram illustrating an example of an alert display. In the example of FIG. 9, the alert display screen 150 is displayed on a stationary terminal of an administrator (not shown) that has received the alert information from the server device 200. The alert display screen 150 includes a message such as “Mr. A has fallen!”. In addition, Mr. A is a monitored person.

  FIG. 10 is a diagram illustrating another example of the alert display. In the example of FIG. 10, the alert display screen 170 is displayed on a portable terminal of an administrator (not shown), for example, a smartphone. The alert display screen 170 includes a message such as “Mr. A has fallen!”, For example, in the same manner as the alert display screen 150 of FIG. 9. In addition, Mr. A is a monitored person. That is, the administrator can easily grasp that the monitored person has fallen.

  Next, the operation of the movement detection system 1 of the embodiment will be described. FIG. 11 is a flowchart illustrating an example of the movement detection process according to the embodiment.

  The acquisition unit 17 of the terminal device 10 receives ON of the switch 13 corresponding to the data acquisition request of the atmospheric pressure sensor 12 (step S1). When receiving the switch 13 ON, the acquisition unit 17 starts acquiring the atmospheric pressure value from the atmospheric pressure sensor 12 (step S2). The acquisition unit 17 outputs the acquired atmospheric pressure value to the detection unit 18. The acquisition unit 17 stores the acquired atmospheric pressure value in the log storage unit 15 in association with the date and time.

  When the atmospheric pressure value is input from the acquisition unit 17, the detection unit 18 executes a detection process for detecting a change in height (step S3). Here, the detection process will be described with reference to FIG. FIG. 12 is a flowchart illustrating an example of the detection process. In the following description, the time tp is expressed as the current time, the time t1 is expressed as 2 seconds before the current time, the time t2 is expressed as 1 second before the current time, and the time t3 is expressed as 0.5 seconds before the current time.

  The detecting unit 18 refers to the log storage unit 15 and calculates the atmospheric pressure value X1 = the current atmospheric pressure value−the atmospheric pressure value before 2 seconds (step S31). Similarly, the detection unit 18 calculates the atmospheric pressure value X2 = the current atmospheric pressure value—the atmospheric pressure value one second before (step S32). Similarly, the detector 18 calculates the atmospheric pressure value X3 = the current atmospheric pressure value−the atmospheric pressure value 0.5 seconds before (step S33). The detection unit 18 stores the calculated atmospheric pressure differences X1 to X3 in the log storage unit 15.

  The detector 18 determines whether or not the atmospheric pressure difference X1 is greater than the threshold value S1 (step S34). When the atmospheric pressure difference X1 is larger than the threshold value S1 (Yes at Step S34), the detection unit 18 determines whether the atmospheric pressure difference X2 is larger than the threshold value S2 (Step S35). When the atmospheric pressure difference X2 is larger than the threshold value S2 (step S35: Yes), the detection unit 18 detects that there is a vertical movement with a height change (step S36).

  When the atmospheric pressure difference X1 is equal to or smaller than the threshold S1 (No at Step S34), or when the atmospheric pressure difference X2 is equal to or smaller than the threshold S2 (No at Step S35), the detection unit 18 does not change the height, that is, in the vertical direction. It is detected that there is no movement (step S37). The detection unit 18 outputs the detection result of the vertical movement to the determination unit 19, ends the detection process, and returns to the original process. Thereby, the detection part 18 can detect the presence or absence of a height change.

  Returning to the description of FIG. 11, the detection result is input from the detection unit 18 to the determination unit 19 when the detection process is completed. The determination unit 19 refers to the log storage unit 15 and determines whether or not the input detection result has a height change (step S4). When the detection result shows no change in height (No at Step S4), the determination unit 19 stores the determination result that there is no change in height in the log storage unit 15 and sends an end check instruction to the acquisition unit 17. Output.

  If the detection result indicates that there is a height change (step S4: affirmative), the determination unit 19 determines whether or not the atmospheric pressure difference X3 is greater than the threshold value S3 (step S5). When the atmospheric pressure difference X3 is greater than the threshold value S3 (step S5: affirmative), the determination unit 19 determines that the monitored person has fallen (step S6). If the determination unit 19 determines that the monitored person has fallen, the determination unit 19 stores the determination result in the log storage unit 15 and outputs the determination result to the communication control unit 20.

  When the determination result that the monitored person has fallen is input from the determination unit 19, the communication control unit 20 transmits the input determination result to the server device 200 (step S <b> 7). When the communication control unit 20 transmits the determination result to the server device 200, the communication control unit 20 outputs an end check instruction to the acquisition unit 17. The server device 200 that has received the determination result in step S7 transmits alert information to an administrator's terminal (not shown), and displays an alert display screen.

  When the condition that the atmospheric pressure difference X3 is greater than the threshold value S3 is not satisfied (No at Step S5), the determination unit 19 determines that the monitored person has been in a supine position (Step S8). When the determination unit 19 determines that the person to be monitored is in a prone position, the determination unit 19 stores the determination result in the log storage unit 15 and outputs an end check instruction to the acquisition unit 17.

  When the end check instruction is input from the determination unit 19 or the communication control unit 20, the acquisition unit 17 determines whether or not the switch 13 corresponding to the data acquisition request is OFF (step S9). If the switch 13 is not OFF (No at Step S9), the acquisition unit 17 returns to Step S3. If the switch 13 is OFF (step S9: affirmative), the acquisition unit 17 ends the movement detection process. Thereby, the terminal device 10 can improve the accuracy of movement detection by comparing the pressure differences in a plurality of time zones having different lengths with a predetermined threshold value.

  Thus, the terminal device 10 acquires the atmospheric pressure value from the atmospheric pressure sensor. Further, the terminal device 10 calculates each atmospheric pressure change value in a plurality of time zones having different lengths and partially overlapping based on the acquired atmospheric pressure value, and calculates the calculated atmospheric pressure change values. The movement in the vertical direction is detected by comparing with a predetermined threshold value. Further, the terminal device 10 determines the state of the monitored person based on the detected vertical movement. As a result, the accuracy of movement detection can be increased.

  Further, the terminal device 10 further transmits a determination result of the state of the monitored person to the server device 200. As a result, the status of the monitored person can be notified to the administrator who has received the notification from the server device 200.

  In addition, when it is determined that the monitored person has fallen, the terminal device 10 transmits a determination result to the server device 200. As a result, when the monitored person falls, it is possible to promptly notify the administrator of the status of the monitored person.

  In addition, the terminal device 10 determines to distinguish between the posture change of the monitored person and the fall. As a result, it is possible to suppress erroneous detection of a simple posture change as a fall.

  In the above-described embodiment, the height change and the fall are detected based on the three time differences T1 to T3. However, the present invention is not limited to this. For example, the height change may be detected based on two time differences.

  Moreover, although the said Example demonstrated using the example in which a to-be-monitored person is a field worker, it is not limited to this. For example, the monitored person may be an elderly person, and in this case, the staff of the care facility can quickly cope with the fall of the elderly person.

  In addition, each component of each part illustrated does not necessarily need to be physically configured as illustrated. In other words, the specific form of distribution / integration of each unit is not limited to that shown in the figure, and all or a part thereof may be functionally or physically distributed / integrated in arbitrary units according to various loads or usage conditions. Can be configured. For example, the detection unit 18 and the determination unit 19 may be integrated. In addition, the illustrated processes are not limited to the above-described order, and may be performed at the same time as long as the process contents are not contradictory, or may be performed in a different order.

  Furthermore, various processing functions performed by each device may be executed entirely or arbitrarily on a CPU (or a microcomputer such as an MPU or MCU (Micro Controller Unit)). In addition, various processing functions may be executed in whole or in any part on a program that is analyzed and executed by a CPU (or a microcomputer such as an MPU or MCU) or on hardware based on wired logic. Needless to say, it is good.

  By the way, the various processes described in the above embodiments can be realized by executing a program prepared in advance by a computer. Therefore, in the following, an example of a computer that executes a program having the same function as in the above embodiment will be described. FIG. 13 is a diagram illustrating an example of a computer that executes a movement detection program.

  As illustrated in FIG. 13, the computer 300 includes a CPU 301 that executes various arithmetic processes, an atmospheric pressure sensor 302 that measures atmospheric pressure, and a switch 303 that turns on and off a movement detection function. The computer 300 also includes an RTC (Real Time Clock) 304 that outputs time information, a display device 305 that displays the operating state of the computer 300, and a communication device 306 for wirelessly connecting to other information processing devices and the like. Have The computer 300 also includes a RAM 307 that temporarily stores various types of information and a flash memory 308. Each device 301 to 308 is connected to a bus 309.

  The flash memory 308 stores a movement detection program having the same functions as the processing units of the acquisition unit 17, the detection unit 18, the determination unit 19, and the communication control unit 20 illustrated in FIG. The flash memory 308 stores the log storage unit 15 and various data for realizing the movement detection program. The atmospheric pressure sensor 302 outputs the measured atmospheric pressure to the CPU 301 as an atmospheric pressure value. The switch 303 is a switch for turning on / off the movement detection function. The RTC 304 outputs time information to the CPU 301. The display device 305 displays, for example, the ON / OFF state of movement detection. For example, the communication device 306 has the same function as the communication unit 11 illustrated in FIG. 1 and is connected to the gateway device 100 to exchange various information with the gateway device 100.

  The CPU 301 reads out each program stored in the flash memory 308, develops it in the RAM 307, and executes it to perform various processes. In addition, these programs can cause the computer 300 to function as the acquisition unit 17, the detection unit 18, the determination unit 19, and the communication control unit 20 illustrated in FIG.

  Note that the above movement detection program is not necessarily stored in the flash memory 308. For example, the computer 300 may read and execute a program stored in a storage medium readable by the computer 300. The storage medium readable by the computer 300 corresponds to, for example, a portable recording medium such as a CD-ROM, a DVD disk, a USB (Universal Serial Bus) memory, a semiconductor memory such as a flash memory, a hard disk drive, and the like. Alternatively, the movement detection program may be stored in a device connected to a public line, the Internet, a LAN, or the like, and the computer 300 may read and execute the movement detection program therefrom.

DESCRIPTION OF SYMBOLS 1 Movement detection system 10 Terminal apparatus 11 Communication part 12 Atmospheric pressure sensor 13 Switch 14 Storage part 15 Log storage part 16 Control part 17 Acquisition part 18 Detection part 19 Judgment part 20 Communication control part 100 Gateway apparatus 200 Server apparatus N Network

Claims (5)

An acquisition unit for acquiring an atmospheric pressure value from an atmospheric pressure sensor;
Based on the acquired atmospheric pressure value, calculating each atmospheric pressure change value in a plurality of time zones having different lengths and partially overlapping, and comparing each calculated atmospheric pressure change value with a predetermined threshold value And a detection unit for detecting movement in the vertical direction,
A determination unit that determines the state of the monitored person based on the detected vertical movement;
An electronic device comprising: Furthermore, a communication control unit that transmits the determination result of the state of the monitored person to the server device,
The electronic apparatus according to claim 1, further comprising: When it is determined that the monitored person has fallen, the communication control unit transmits the determination result to the server device.
The electronic device according to claim 2. The determination unit determines to distinguish between the posture change and the fall of the monitored person,
The electronic device according to claim 1. Get the pressure value from the pressure sensor,
Based on the acquired atmospheric pressure value, calculating each atmospheric pressure change value in a plurality of time zones having different lengths and partially overlapping, and comparing each calculated atmospheric pressure change value with a predetermined threshold value To detect vertical movement,
Based on the detected vertical movement, the state of the monitored person is determined.
A movement detection program for causing a computer to execute processing.

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