Monitoring system, monitoring method, and monitoring program

Abstract

To provide a monitoring system, a monitoring method, and a monitoring program for outputting an alarm when an abnormality occurs in a user.SOLUTION: A monitoring system includes: a plurality of acceleration sensors that are attached to the same user; an acquisition unit that acquires acceleration information regarding accelerations detected by each of the acceleration sensors; a determination unit that determines whether a time during which at least two of the accelerations based on the plurality of pieces of acceleration information acquired by the acquisition unit are less than a first threshold continues for a predetermined time or more at the same timing; and an alarm control unit that outputs an alarm when the determination unit determines that the acceleration less than the first threshold at the same timing continues for the predetermined time or more.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a monitoring system, a monitoring method, and a monitoring program.

Background Art

[0002] Conventionally, there has been a system for detecting abnormalities of a person to be detected. The system uses a human body detection sensor (a sensor that detects heat rays radiated from a human body) to detect the presence or absence of the movement of the person to be detected. That is, when the system does not detect the movement of the person to be detected from the time when the movement of the person to be detected is detected by the human body detection sensor until a predetermined warning period elapses, the system outputs a warning to prompt an action for the person to be detected. Further, when the system does not detect the movement of the person to be detected until an alarm period longer than the warning period elapses from the time of the previous detection, the system notifies an external party of the abnormality (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The system described in Patent Document 1 uses, as a human body detection sensor, a sensor that detects heat rays radiated from a human body. However, when the person to be detected is in the blind spot of the human body detection sensor, the abnormality of the person to be detected cannot be detected.

[0005] The present disclosure provides a monitoring system, a monitoring method, and a monitoring program that output an alarm when there is an abnormality for a user.

Means for Solving the Problems

[0006] A monitoring system according to one aspect includes a plurality of acceleration sensors attached to the same user, an acquisition unit that acquires acceleration information regarding the acceleration detected by each of the acceleration sensors, and at least two of the accelerations based on the plurality of acceleration information acquired by the acquisition unit. A determination unit that determines whether the time when the value is less than the first threshold continues for a predetermined time or more at the same timing, and an alarm control unit that outputs an alarm when the determination unit determines that the acceleration that is less than the first threshold at the same timing continues for a predetermined time or more.

Advantages of the Invention

[0007] The monitoring system, monitoring method, and monitoring program of the present disclosure can output an alarm when there is an abnormality in the user.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Modes for Carrying Out the Invention

[0009] Hereinafter, one embodiment will be described.

[0010] [Overview of Monitoring System 1] First, the overview of a monitoring system 1 according to one embodiment will be described. FIG. 1 is a diagram for explaining a monitoring system 1 according to one embodiment. FIG. 2 is a block diagram for explaining an acceleration sensor 200 according to one embodiment.

[0011] The monitoring system 1 includes a plurality of acceleration sensors 200 and a monitoring device 100 that communicates with each acceleration sensor 200.

[0012] The plurality of acceleration sensors 200 are worn by the same user 300. At least two of the plurality of acceleration sensors 200 are each worn on each upper arm of the user 300. As a specific example, when there are two acceleration sensors 200, one acceleration sensor 200 is arranged on the right upper arm of the user 300, and the other acceleration sensor 200 is arranged on the left upper arm of the same user 300. The upper arm is the part between the user 300's shoulder and elbow, and the acceleration sensor 200 may be arranged on the outer side of the human body (opposite to the torso) in that part (upper arm). Note that the acceleration sensor 200 is not limited to two, and three or more may be worn by the same user 300.

[0013] Each acceleration sensor 200 may be arranged on a ribbon-shaped "band", and the band may be wound around the upper arm of the user 300 to be worn by the user 300. Alternatively, the acceleration sensor 200 may be arranged on the surfaces of various members such as a card and a pen-shaped rod, and the inside of the housing, etc., and the member may be inserted into a pocket or the like on the upper arm of the clothes worn by the user 300 to be worn by the user 300. Alternatively, the acceleration sensor 200 may be fixed to the surfaces of work clothes and clothes (for example, sleeve parts, etc.).

[0014] The acceleration sensor 200 may include a measurement unit 201 and a sensor communication unit 202. The measurement unit 201 measures acceleration and generates acceleration information. The measurement unit 201 stores identification information (first identification information) for identifying the acceleration sensor 200, and the first identification information may be included in the acceleration information. The sensor communication unit 202 transmits the acceleration information generated by the measurement unit 201 to the outside (for example, the monitoring device 100, etc.). The sensor communication unit 202 may perform wireless communication such as Bluetooth (registered trademark), Wi-Fi (registered trademark), and wireless LAN.

[0015] The monitoring device 100 may be, for example, a computer (information processing device) such as a server, a desktop, a laptop, a tablet, or a smartphone. The monitoring device 100 acquires acceleration information transmitted from each of the multiple acceleration sensors 200. The monitoring device 100 compares multiple pieces of acceleration information (accelerations) attached to the same user 300 with a first threshold value, and determines whether at least two acceleration values ​​become less than the first threshold value at the same timing (determination item A). When the monitoring device 100 determines that the at least two acceleration values ​​become less than the first threshold value at the same timing, it determines whether the time (continuation time) during which the at least two acceleration values ​​become less than the first threshold value at the same timing continues for a predetermined time or more (determination item B). When both of the above two determination items A and B are met (when the determination is "Yes"), the monitoring device 100 presumes that an abnormality has occurred in the user 300, such as the user 300 possibly losing consciousness or the user 300 possibly being injured and unable to move. When the monitoring device 100 determines that the accelerations that become less than the first threshold value at the same timing continue for a predetermined time or more by the above-mentioned determination, it outputs an alarm.

[0016] [Details of monitoring device 100] Next, the monitoring device 100 according to an embodiment will be described in detail. FIG. 3 is a block diagram illustrating the monitoring device 100 according to an embodiment.

[0017] The monitoring device 100 includes, for example, a communication unit 121, a storage unit 122, a display unit 123, a control unit 110, and the like. The communication unit 121, the storage unit 122, and the display unit 123 may be an embodiment of the output unit. The control unit 110 includes, for example, an acquisition unit 111, a determination unit 112 (a first determination unit and a second determination unit), an alarm control unit 113, and the like. The control unit 110 may be constituted by, for example, an arithmetic processing device of the monitoring device 100. The control unit 110 (for example, an arithmetic processing device or the like) may realize the functions of each unit (for example, the acquisition unit 111, the determination unit 112 (the first determination unit and the second determination unit), the alarm control unit 113, and the like) by appropriately reading and executing various programs and the like stored in the storage unit 122 and the like.

[0018] The communication unit 121 is, for example, a communication interface capable of transmitting and receiving various information to and from a device (external device) outside the monitoring device 100. The external device is, for example, a plurality of acceleration sensors 200, a server (not shown), a user terminal (not shown), and the like. The user terminal is a terminal used by the user of the monitoring system 1, and as an example, may be a desktop, a laptop, a tablet, a smartphone, or the like. In this case, the user of the monitoring system 1 may be a worker, a work supervisor, a security guard, a communication operator in a fire command room, or the like.

[0019] Note that there may be a plurality of communication units 121. Each of the plurality of communication units 121 communicates with the acceleration sensor 200. In this case, each communication unit 121 may be arranged at a different position so that a part of the communication range of each of the plurality of communication units 121 overlaps, that is, so that a non-communication range does not occur. Alternatively, one or more communication units 121 may be arranged for each room (compartment).

[0020] Position information may be set for each of the communication units 121. In this case, the position information may be information capable of specifying the position where the communication unit 121 is arranged. For this reason, the position information may be information associating identification information (second identification information) for identifying a plurality of communication units 121 with information on the location (position) where each of the plurality of communication units 121 is arranged.

[0021] The storage unit 122 may store various information and programs, for example. An example of the storage unit 122 may be a memory, a solid state drive, a hard disk drive, or the like. Note that the storage unit 122 may be, for example, a storage area and a server on the cloud or the like.

[0022] The display unit 123 is, for example, a display capable of displaying various characters, symbols, images, and the like.

[0023] The acquisition unit 111 acquires acceleration information regarding the acceleration detected by each of the acceleration sensors 200 via the communication unit 121. When acquiring the acceleration information, the acquisition unit 111 may acquire second identification information of the communication unit 121 that received the acceleration information from the communication unit 121. That is, the acquisition unit 111 may acquire the acceleration information and the second identification information of the communication unit 121 that received the acceleration information via the communication unit 121. The plurality of acceleration sensors 200 are worn by the same user 300. At least two of the plurality of acceleration sensors 200 are each worn on each upper arm of the user 300.

[0024] The determination unit 112 (first determination unit) determines whether a time during which at least two of the accelerations based on the plurality of acceleration information acquired by the acquisition unit 111 are less than a first threshold value continues for a predetermined time or more at the same timing. Note that in the present disclosure, the concept of "less than the first threshold value" may include the concept of "less than or equal to the first threshold value".

[0025] The determination unit 112 (first determination unit) compares a plurality of pieces of acceleration information (acceleration) worn by the same user 300 with a first threshold value, and determines whether at least two acceleration values become less than the first threshold value at the same timing (determination item A). The determination unit 112 (first determination unit) may use the first identification information included in the acceleration information to identify the acceleration sensor 200 worn by the same user 300 (acceleration information measured by the same user 300). In this case, the determination unit 112 (first determination unit) refers to the correspondence information in which the user 300 and the first identification information of each of the plurality of acceleration sensors 200 worn by the user 300 are associated in advance, and determines which user 300 the acceleration information (identification information) acquired by the acquisition unit 111 is the result of measuring the acceleration.

[0026] The first threshold value may be, for example, an acceleration value for determining that some abnormality has occurred to the user 300 and the user cannot move. As an example, a value smaller than the acceleration detected in the normal movement (motion) of the user 300 may be set as the first threshold value.

[0027] The same timing includes a period in which the times when at least two acceleration values become less than the first threshold value coincide. As an example, when there are accelerations A and B measured by the same user 300, it means including the time that coincides with the time when the value of acceleration A becomes less than the first threshold value and the time when the value of acceleration B becomes less than the first threshold value. That is, even if the start time when the value of acceleration A becomes less than the first threshold value is different from the start time when the value of acceleration B becomes less than the first threshold value, if there is a time when the values of accelerations A and B both become less than the first threshold value thereafter, it can be said that they are at the same timing.

[0028] Further, when the determination unit 112 (first determination unit) determines in the above-described determination item A that at least two acceleration values become less than the first threshold value at the same timing, the determination unit 112 determines whether the time (duration) during which at least two acceleration values become less than the first threshold value at the same timing continues for a predetermined time or longer (determination item B). The specified time is the time for determining that an abnormality has occurred to the user 300 and the user 300 cannot move. For example, it is the time for determining that the user 300 may have lost consciousness, the user 300 may be injured and unable to move, etc. Various times may be set for the determination time.

[0029] The determination unit 112 (second determination unit) may determine whether at least two of the accelerations based on the plurality of acceleration information become equal to or greater than a second threshold value that is greater than the first threshold value at the same timing (determination item C). In the present disclosure, the concept of "equal to or greater than the second threshold value" may include the concept of "exceeding the second threshold value". The second threshold value may be, for example, a value of acceleration for determining that a relatively strong impact has been applied to the user 300, such as the user 300 falling or a falling object hitting the user 300.

[0030] Similar to the first determination unit described above, the determination unit 112 (second determination unit) may specify the acceleration attached to the same user 300 by using the first identification information. That is, the determination unit 112 (second determination unit) may specify the acceleration sensor 200 attached to the same user 300 (acceleration information measured in the same user 300) by using the first identification information included in the acceleration information. In this case, the determination unit 112 (second determination unit) may refer to the correspondence information in which the user 300 and the first identification information of each of the plurality of acceleration sensors 200 attached to the user 300 are associated in advance, and specify which user 300 the acceleration information (identification information) acquired by the acquisition unit 111 is the result of measuring the acceleration.

[0031] The same timing includes a period in which the times at which at least two acceleration values ​​become equal to or greater than the second threshold coincide. For example, when accelerations A and B are measured by the same user 300, the time includes the time when the value of acceleration A becomes equal to or greater than the second threshold coincides with the time when the value of acceleration B becomes equal to or greater than the second threshold. In other words, even if the time when the value of acceleration A becomes equal to or greater than the second threshold and the time when the value of acceleration B becomes equal to or greater than the second threshold are different, if there is a time when the value of acceleration B becomes equal to or greater than the second threshold within a predetermined time from the time when the value of acceleration A becomes equal to or greater than the second threshold, it can be said that they are the same timing. The predetermined time may be various times that allow it to be estimated that the user 300 was subjected to an impact at the same time (almost simultaneously), etc.

[0032] If both of the above two judgment items A and B in the judgment unit 112 (first judgment unit) are met (if the judgment is "Affirmative" and "Yes"), the warning control unit 113 presumes that the user 300 is not moving (an abnormality has occurred in the user 300). In other words, if the judgment unit 112 judges that the acceleration that is less than the first threshold at the same timing continues for a predetermined period of time or more, the warning control unit 113 outputs a warning.

[0033] Furthermore, when the determination item C in the determination unit 112 (second determination unit) is met (when the determination is "Acknowledged" and "Yes"), the warning control unit 113 presumes that an impact has been applied to the user 300 (an abnormality has occurred in the user 300). In other words, the warning control unit 113 may output a warning when the determination unit 112 determines that the acceleration is equal to or greater than the second threshold at the same timing.

[0034] As an example, when the acceleration is determined by the determination unit 112 (second determination unit) to be equal to or greater than the second threshold value at the same timing (determination item C), and within a predetermined time thereafter, it is determined by the determination unit 112 (first determination unit) that the acceleration less than the first threshold value continues for a predetermined time or more at the same timing (determination items A and B), the warning control unit 113 may output a warning. The predetermined time is the time from when determination item C is determined to when determination items A and B are determined, and may be various times that enable the estimation that the user 300 has fallen and cannot move.

[0035] For example, when outputting a warning, the warning control unit 113 may control the output unit. The output unit may be the communication unit 121, the storage unit 122, the display unit 123, or the like. That is, the warning control unit 113 may control the communication unit 121 to transmit warning information indicating that an abnormality has occurred to the user 300 to an external device. The external device here may be, for example, a server (not shown) and a user terminal (not shown), or the like. The warning control unit 113 may control the storage unit 122 to store warning information (for example, history information such as a log) indicating that an abnormality has occurred to the user 300. The warning control unit 113 may control the display unit 123 to display a warning indicating that an abnormality has occurred to the user 300. Note that the output unit may be a speaker or the like. In this case, the warning control unit 113 may output a warning sound or a warning voice from the speaker indicating that an abnormality has occurred to the user 300.

[0036] Note that the warning control unit 113 may identify the user 300 by using the first identification information included in the acceleration information, that is, may identify the user 300 with an abnormality. When outputting a warning, the warning control unit 113 may control the output unit to output the information of the identified user 300 with an abnormality. In this case, the information of the user 300 may be the name, age, affiliation, blood type, etc. of the user associated with the first identification information.

[0037] When the determination unit 112 (first determination unit) determines that the acceleration below the first threshold continues for a predetermined time or more at the same timing, the alarm control unit 113 may estimate the position of the user 300 based on the position information set in the communication unit 121 that has received the acceleration information corresponding to the acceleration, and output the estimated position. When the determination unit 112 (second determination unit) determines that the acceleration is equal to or greater than the second threshold at the same timing, the alarm control unit 113 may estimate the position of the user 300 based on the position information set in the communication unit 121 that has received the acceleration information corresponding to the acceleration, and output the estimated position.

[0038] That is, when the second identification information is set in the communication unit 121, the alarm control unit 113 identifies the second identification information of the communication unit 121 that has received the acceleration information of the acceleration sensor 200 attached to the user 300 (abnormal occurrence user) for whom an abnormality is presumed to have occurred. The alarm control unit 113 refers to the position information set in the communication unit 121 (the second identification information and the information on the position of the communication unit 121 where the second identification information is set), and identifies the position (position information) of the communication unit 121 corresponding to the second identification information specified as described above. The alarm control unit 113 may estimate that the abnormal occurrence user is within the communication range of the identified communication unit 121, and output the position where the abnormal occurrence user is located (the position of the communication unit 121). When outputting the alarm, the alarm control unit 113 may control the output unit to output at least one of the information on the abnormal occurrence user specified based on the first identification information and the information on the position (the position of the communication unit 121) where the abnormal occurrence user is located.

[0039] [Monitoring method] Next, an information processing method according to an embodiment will be described. FIG. 4 is a flowchart for explaining an information processing method according to an embodiment.

[0040] In step ST101, each of a plurality of acceleration sensors 200 attached to the same user 300 measures acceleration. At least two of the plurality of acceleration sensors 200 may be attached to each upper arm of the user 300, for example.

[0041] In step ST102, the acquisition unit 111 acquires acceleration information regarding the acceleration measured in step ST101 via the communication unit 121.

[0042] In step ST103, the determination unit 112 determines whether the time during which at least two of the accelerations based on the plurality of acceleration information of the same user 300 acquired in step ST102 are less than the first threshold continues for a predetermined time or more at the same timing.

[0043] In step ST104, the determination unit 112 determines whether at least two of the accelerations based on the plurality of acceleration information of the same user 300 acquired in step ST102 become equal to or greater than a second threshold greater than the first threshold at the same timing.

[0044] Note that the order of performing the process of step ST103 and the process of step ST104 is not limited to the example in which the process of step ST104 is performed after the process of step ST103, and the process of step ST103 may be performed after the process of step ST104.

[0045] In step ST105, when it is determined in step ST103 that the acceleration that is less than the first threshold at the same timing continues for a predetermined time or more, the alarm control unit 113 outputs an alarm. In this case, when it is determined in step ST103 that the acceleration that is less than the first threshold at the same timing continues for a predetermined time or more, the alarm control unit 113 may estimate the position of the user 300 based on the position information set in the communication unit 121 that has received the acceleration information corresponding to the acceleration, and output the estimated position. Further, when the alarm control unit 113 determines in step ST104 that the acceleration is equal to or greater than the second threshold value at the same timing, it outputs an alarm. When the alarm control unit 113 determines in step ST104 that the acceleration is equal to or greater than the second threshold value at the same timing, it may estimate the position of the user 300 based on the position information set in the communication unit 121 that has received the acceleration information corresponding to the acceleration, and output the estimated position.

[0046] [Functions and Circuits] Next, the functions and circuits of the monitoring device 100 described above will be explained. Each part of the monitoring device 100 may be realized as a function of a computer's arithmetic processing unit or the like. That is, the acquisition unit 111, the determination unit 112, and the alarm control unit 113 (control unit 110) of the monitoring device 100 may be realized as an acquisition function, a determination function, and an alarm control function (control function) by a computer's arithmetic processing unit or the like, respectively. The monitoring program can cause a computer to realize the above-described various functions. The monitoring program may be recorded on a non-temporary storage medium readable by a computer, such as a memory, a solid state drive, a hard disk drive, or an optical disk. The storage medium may be, for example, rephrased as a non-temporary computer-readable medium that stores the monitoring program. Also, as described above, each part of the monitoring device 100 may be realized by a computer's arithmetic processing unit or the like. The arithmetic processing unit or the like is constituted by, for example, an integrated circuit or the like. Therefore, each part of the monitoring device 100 may be realized as a circuit that constitutes the arithmetic processing unit or the like. That is, the acquisition unit 111, the determination unit 112, and the alarm control unit 113 (control unit 110) of the monitoring device 100 may be realized as an acquisition circuit, a determination circuit, and an alarm control circuit (control circuit) that constitute a computer's arithmetic processing unit or the like. In addition, the communication unit 121, the storage unit 122, and the display unit 123 (output unit) of the monitoring device 100 may be realized as a communication function, a storage function, and a display function (output function) including functions such as an arithmetic processing device, for example. Further, the communication unit 121, the storage unit 122, and the display unit 123 (output unit) of the monitoring device 100 may be realized as a communication circuit, a storage circuit, and a display circuit (output circuit) by being constituted by, for example, an integrated circuit or the like. Further, the communication unit 121, the storage unit 122, and the display unit 123 (output unit) of the monitoring device 100 may be configured as a communication device, a storage device, and a display device (output device) by being constituted by, for example, a plurality of devices.

[0047] The monitoring system 1 and the monitoring device 100 can combine one or any plurality of the above-described plurality of units. In the present disclosure, the term "information" is used, but the term "information" can be replaced with "data", and the term "data" can be replaced with "information".

[0048] [Aspects and Effects of the Present Embodiment] Next, one aspect of the present embodiment and the effects exhibited by each aspect will be described. Note that each aspect described below is an example at the time of filing, and the present embodiment is not limited to the aspects described below. That is, the present embodiment is not limited to the aspects described below, and may be realized by appropriately combining the above-described units. Further, a lower aspect may be cited in any of the higher aspects. In addition, the effects described below are examples, and the effects exhibited by each aspect are not limited to those described below. Further, each aspect may exhibit, for example, at least one of the effects described below.

[0049] (Aspect 1) A monitoring system according to one aspect includes a plurality of acceleration sensors attached to the same user, an acquisition unit that acquires acceleration information regarding the acceleration detected by each of the acceleration sensors, and a determination unit that determines whether a time during which at least two of the accelerations based on the plurality of acceleration information acquired by the acquisition unit are less than a first threshold value continues for a predetermined time or more at the same timing, and an alarm control unit that outputs an alarm when the determination unit determines that the acceleration less than the first threshold value continues for a predetermined time or more at the same timing. Thereby, the monitoring system can estimate the possibility that there is an abnormality in the user, and can output an alarm when it is estimated that there is an abnormality in the user.

[0050] In recent years, the number of jobs in which elderly people work, such as re-employment after retirement, has been increasing. In this case, if a person faints during work alone, there is a risk that the response will be delayed. For this reason, a device that quickly outputs an alarm when an abnormality occurs during solo work has been desired. Note that a gravity direction detection type abnormality detection device detects a change in the gravity direction, and an impact detection type abnormality detection device detects that an impact has been applied. With these types of abnormality detection devices, an abnormality cannot be detected when an operator faints while sitting or when the posture of the operator does not change. In addition, a pulse detection type abnormality detection device detects a pulse by being attached to the wrist or the like of an operator, and there is a risk that a wrist protector cannot be worn. Further, when an abnormality of an operator is detected by arranging a human body detection sensor (human presence sensor), there is a risk of a dead angle of the human presence sensor, and when the work area such as a factory is relatively large, it is necessary to install a large number of human presence sensors, so the installation cost and the like may be relatively high. Therefore, the monitoring system of this embodiment attaches acceleration sensors to at least two locations on the operator's body. If at least two locations cannot detect a change in acceleration above a certain level at the same timing, it is presumed that there is an abnormality in the operator, and an alarm is output. The acceleration sensor can be of a relatively small type. According to such a monitoring system, since an abnormality is presumed based on the measurement results of acceleration sensors arranged at at least two locations (multiple locations) of the same operator, the abnormality can be presumed more accurately, and a safer device with higher precision can be realized. When an acceleration sensor is arranged at only one location, there is a possibility that a body part that does not move may occur depending on the operator's work, so there is a risk of false detection. However, in this embodiment, such false detection can be suppressed. Also, if the acceleration sensor is arranged on the upper arm or the like, it is possible to suppress interfering with the operator's work and protect the safety of the operator.

[0051] (Aspect 2) In a monitoring system of one aspect, the determination unit determines whether at least two of the accelerations based on a plurality of acceleration information are greater than or equal to a second threshold value that is greater than a first threshold value at the same timing, and the alarm control unit may output an alarm when the determination unit determines that the acceleration is greater than or equal to the second threshold value at the same timing. Thereby, the monitoring system can presume the possibility of an abnormality in the user, and can output an alarm when it is presumed that there is an abnormality in the user.

[0052] (Aspect 3) In a monitoring system of one aspect, at least two of the plurality of acceleration sensors may each be attached to each upper arm of the user. Whether the user is sitting and performing various tasks or standing and performing various tasks, the upper arm is considered to have the most movement in the user's body. The monitoring system can appropriately determine whether an abnormality has occurred in the user by determining whether the acceleration measured by each of the acceleration sensors attached to the left and right upper arms of the user is less than the first threshold value or greater than or equal to the second threshold value.

[0053] (Aspect 4) A monitoring system according to one aspect communicates with an acceleration sensor, and includes a plurality of communication units each having set therein position information and arranged at different positions. When it is determined by the determination unit that an acceleration less than a first threshold continues for a predetermined time or more at the same timing, the warning control unit estimates the position of the user based on the position information set in the communication unit that has received the acceleration information corresponding to the acceleration, and may output the estimated position. Thereby, the monitoring system can estimate the position where the user has an abnormality, that is, the position where the user has an abnormality and is unable to move, and can rush immediately below the user estimated to have an abnormality.

[0054] (Aspect 5) A monitoring system according to one aspect communicates with an acceleration sensor, and includes a plurality of communication units each having set therein position information. When it is determined by the determination unit that the acceleration is equal to or greater than a second threshold at the same timing, the warning control unit estimates the position of the user based on the position information set in the communication unit that has received the acceleration information corresponding to the acceleration, and may output the estimated position. Thereby, the monitoring system can estimate the position where the user has an abnormality, that is, the position where an impact has been applied to the user, and can rush immediately below the user estimated to have an abnormality.

[0055] (Aspect 6) In a monitoring method according to one aspect, a computer capable of communicating with each of a plurality of acceleration sensors attached to the same user acquires acceleration information regarding the acceleration detected by each of the acceleration sensors; determines whether, among the accelerations based on the plurality of acceleration information acquired in the acquisition step, the time during which at least two of them are less than a first threshold continues for a predetermined time or more at the same timing; and when it is determined in the determination step that an acceleration less than the first threshold continues for a predetermined time or more at the same timing, executes a warning control step of outputting a warning. Thereby, the monitoring method can achieve the same effect as the monitoring device according to one aspect described above.

[0056] (Aspect 7) A monitoring program according to one aspect causes a computer capable of communicating with each of a plurality of acceleration sensors worn by the same user to have an acquisition function of acquiring acceleration information regarding the acceleration detected by each of the acceleration sensors, and at least two of the accelerations based on the plurality of acceleration information acquired by the acquisition function are less than a first threshold value. A determination function for determining whether the time continues for a predetermined time or more at the same timing, and an alarm control function for outputting an alarm when it is determined by the determination function that the acceleration less than the first threshold value continues for a predetermined time or more at the same timing. Thereby, the monitoring program can achieve the same effect as the monitoring device of the above-described one aspect.

Explanation of Signs

[0057] 1 Monitoring system 100 Monitoring device 110 Control unit 111 Acquisition unit 112 Determination unit 113 Alarm control unit 121 Communication unit 122 Storage unit 123 Display unit 200 Acceleration sensor 201 Measurement unit 202 Sensor communication unit 300 User

Claims

1. A plurality of acceleration sensors worn by the same user, and an acquisition unit that acquires acceleration information regarding the acceleration detected by each of the acceleration sensors, a determination unit that determines whether a time during which at least two of the accelerations based on the plurality of acceleration information acquired by the acquisition unit are less than a first threshold continues for a predetermined time or more at the same timing, an alarm control unit that outputs an alarm when the determination unit determines that the acceleration that is less than the first threshold continues for a predetermined time or more at the same timing; A monitoring system comprising the above.

2. The determination unit determines whether at least two of the accelerations based on the plurality of acceleration information are equal to or greater than a second threshold that is greater than the first threshold at the same timing, The alarm control unit outputs an alarm when the determination unit determines that the acceleration is equal to or greater than the second threshold at the same timing. The monitoring system according to Claim 1.

3. At least two of the plurality of acceleration sensors are each worn on each upper arm of the user. The monitoring system according to Claim 1 or 2.

4. Comprising a plurality of communication units that communicate with the acceleration sensors, each having position information set therein and arranged at different positions, When the determination unit determines that the acceleration that is less than the first threshold continues for a predetermined time or more at the same timing, the alarm control unit estimates the position of the user based on the position information set in the communication unit that received the acceleration information corresponding to the acceleration, and outputs the estimated position. The monitoring system according to Claim 1.

5. Comprising a plurality of communication units that communicate with the acceleration sensors, each having position information set therein and arranged at different positions, When the determination unit determines that the acceleration is equal to or greater than the second threshold at the same timing, the alarm control unit estimates the position of the user based on the position information set in the communication unit that received the acceleration information corresponding to the acceleration, and outputs the estimated position. The monitoring system according to Claim 2.

6. A computer capable of communicating with each of a plurality of acceleration sensors worn by the same user, an acquisition step of acquiring acceleration information regarding the acceleration detected by each of the acceleration sensors, a determination step of determining whether a time during which at least two of the accelerations based on the plurality of acceleration information acquired by the acquisition step are less than a first threshold continues for a predetermined time or more at the same timing, When it is determined in the determination step that the acceleration being less than the first threshold value continues for a predetermined time or more at the same timing, an alarm control step for outputting an alarm; A monitoring method for executing the above.

7. In a computer capable of communicating with each of a plurality of acceleration sensors worn by the same user, An acquisition function for acquiring acceleration information regarding the acceleration detected by each of the acceleration sensors; A determination function for determining whether or not the time during which at least two of the accelerations based on the plurality of acceleration information acquired by the acquisition function are less than the first threshold value continues for a predetermined time or more at the same timing; An alarm control function for outputting an alarm when it is determined by the determination function that the acceleration being less than the first threshold value continues for a predetermined time or more at the same timing; A monitoring program for realizing the above.

Images