JP2018152003A - Control device, control method, and control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control device, a control method, and a control program, which are capable of detecting a state of a person to be monitored irrespective of a presence position of the person to be monitored.SOLUTION: In a control device (control unit) 13, a determination unit 13B determines a state of a person to be monitored who uses a communication terminal 10 based upon a movement trajectory pattern based on a plurality of positions of the communication terminal 10 respectively measured at different measurement timings within a determination target period and a pattern condition. A notification unit 13C outputs a notification signal according to the state of the user determined by the determination unit 13B.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a control device, a control method, and a control program.

  Conventionally, a technique for detecting an abnormal state of a monitoring target person such as a child and notifying emergency information to a guardian has been proposed (for example, Patent Document 1). In the technique disclosed in Patent Document 1, the movement history table is created by repeatedly collecting and accumulating position information of terminals carried by the monitoring subject when the monitoring subject is normal. After that, based on the recently accumulated terminal position and the movement history table, an abnormal state that is remarkably different from the normal movement of the monitoring subject is detected.

JP 2010-67169 A

  However, in the above prior art, since it is necessary to accumulate a normal movement history in advance, it is difficult to detect an abnormal state at a place outside the living area such as a place where the person to be monitored visits for the first time. That is, in the above-described conventional technology, the position of the monitoring target person that can detect the state of the monitoring target person is limited.

  The present invention has been made to solve such a problem, and provides a control device, a control method, and a control program capable of detecting the state of a monitoring target person regardless of the position of the monitoring target person. The purpose is to provide.

  The control device according to an aspect of the present invention provides the determination target based on a movement trajectory pattern based on a plurality of positions of the determination target device measured at a plurality of different measurement timings within the determination target period, and a pattern condition. A determination unit configured to determine a state of a user who uses the apparatus; and a notification unit configured to output a notification signal according to the determined state of the user.

  A control method according to an aspect of the present invention is a control method executed by a control device, and is a movement trajectory pattern based on a plurality of positions of a determination target device, each measured at a plurality of different measurement timings within a determination target period. Based on the pattern condition, the state of the user who uses the determination target device is determined, and a notification signal is output according to the determined state of the user.

  The control program according to an aspect of the present invention is based on a movement trajectory pattern based on a plurality of positions of a determination target device measured at a plurality of different measurement timings in a determination target period, and a pattern condition, and the determination target The state of the user who uses the apparatus is determined, and a process of outputting a notification signal according to the determined state of the user is executed by the computer.

  According to the present invention, it is possible to provide a control device, a control method, and a control program that can detect the state of a monitoring target person regardless of the position of the monitoring target person.

It is a block diagram which shows an example of the communication terminal containing the control apparatus of 1st Embodiment. It is a flowchart which shows an example of the processing operation of the control apparatus of 1st Embodiment. It is a figure which shows an example of the movement trace pattern of 1st Embodiment. It is a flowchart which shows an example of the processing operation of the control apparatus of 2nd Embodiment. It is a flowchart which shows an example of the processing operation of the control apparatus of 3rd Embodiment. It is a figure where it uses for description of the processing operation of the control apparatus of 3rd Embodiment. It is a figure where it uses for description of the processing operation of the control apparatus of 3rd Embodiment. It is a figure where it uses for description of the processing operation of the control apparatus of 3rd Embodiment. It is a figure where it uses for description of the processing operation of the control apparatus of 4th Embodiment. It is a figure where it uses for description of the processing operation of the control apparatus of 4th Embodiment. It is a figure which shows the hardware structural example of a communication terminal.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<First Embodiment>
<Configuration example of control device>
FIG. 1 is a block diagram illustrating an example of a communication terminal including the control device according to the first embodiment. In FIG. 1, the communication terminal 10 includes a GPS (Global Positioning System) signal receiving unit 11, a storage unit 12, a control unit (control device) 13, and a transmission unit 14. The communication terminal 10 is a communication terminal carried (used) by a monitoring subject, for example.

  The GPS signal receiving unit 11 receives GPS signals at predetermined time intervals, converts each received GPS signal into information indicating a position, and outputs the information to the storage unit 12. Thereby, the storage unit 12 stores information regarding a plurality of positions (that is, “measurement positions”) of the communication terminal 10 respectively measured at a plurality of different measurement timings. For example, the plurality of measurement positions are stored in the order of measurement timing, and are acquired by the control unit 13 while maintaining the order.

  The control unit 13 acquires a plurality of measurement positions of the communication terminal 10 stored in the storage unit 12 and measured at a plurality of different measurement timings within the “determination target period” in the order of the measurement timing. Then, the control unit 13 determines the state of the user carrying the determination target terminal (particularly, the state related to the action) based on the “movement locus pattern” and the “pattern condition” based on the plurality of acquired measurement positions. The “notification signal” is output to the transmission unit 14 in accordance with the determined user state. In the following description, a case where “pattern condition” is “abnormal pattern condition” and “notification signal” is “emergency notification signal” will be described as an example. That is, in this case, the control unit 13 determines whether or not the user carrying the communication terminal 10 is in the “abnormal state” based on the “movement locus pattern” and the “abnormal pattern condition” based on the acquired plurality of measurement positions. If it is determined that there is an abnormal condition, an emergency notification signal is output to the transmitter 14. Here, the communication terminal 10 is a “determination target terminal” that is a determination target of an abnormal state. The “determination target period”, “movement locus pattern”, “abnormal pattern condition”, and “abnormal state” will be described in detail later.

  For example, the control unit 13 includes a calculation unit (pattern analysis unit) 13A, a determination unit 13B, and a notification unit 13C.

  In the first embodiment, the calculation unit 13A calculates each distance between each measurement position of the communication terminal 10 acquired from the storage unit 12 and the current position of the communication terminal 10 as a “movement locus pattern”. Here, as the current position of the communication terminal 10, the measurement position of the communication terminal 10 newly stored in the storage unit 12 may be used.

  In the first embodiment, the determination unit 13B counts the number of distances that are equal to or less than the “first threshold value” among the movement trajectory patterns calculated by the calculation unit 13A, that is, a plurality of distances. Then, the determination unit 13B determines whether or not the count value is “predetermined number” or more. When the count value is “predetermined number” or more, the user who carries the communication terminal 10 (that is, the person to be monitored). This state is determined to be a state to be notified, that is, here, it is determined that the user is in an abnormal state. On the other hand, when the count value is less than the “predetermined number”, the determination unit 13B determines that the state of the user carrying the communication terminal 10 is not in a state to be notified, that is, determines that the user is in a normal state. . That is, the “abnormal pattern condition” in the first embodiment is that the number of distances that are equal to or less than the “first threshold” among the plurality of distances within the determination target period calculated by the calculation unit 13A is equal to or greater than the “predetermined number”. It is that. The reason for using such an abnormal pattern condition is that when this abnormal pattern condition is satisfied, the user has repeatedly passed through the same place and is likely to be lost, that is, in a dangerous state. It is because it is considered.

  The notification unit 13C outputs a notification signal to the transmission unit 14 according to the state of the user determined by the determination unit 13B. Specifically, when the determination unit 13B determines that the user who carries the communication terminal 10 is in an abnormal state, the notification unit 13C generates an emergency notification signal for the notification target person and transmits the emergency notification signal to the transmission unit 14. Output. The notification subject is, for example, a guardian of the monitoring subject.

  When receiving the emergency notification signal from the notification unit 13C, the transmission unit 14 wirelessly transmits the emergency notification signal toward the terminal (not shown) of the person to be notified. The notification target person can know that the monitoring target person is in an abnormal state by receiving the emergency notification signal at his / her terminal, and can take measures such as seeking protection of the monitoring target person.

<Operation example of control device>
An example of the processing operation of the control device (control unit) 13 according to the first embodiment having the above configuration will be described. FIG. 2 is a flowchart illustrating an example of a processing operation of the control device according to the first embodiment.

なお、ここでは、各位置を経度及び緯度によって表しているが、これに限定されるものではなく、経度、緯度、及び高度によって表してもよい。
また、測定位置の時間間隔（周期）は、上述の１分毎に限られるものではなく、例えば、１０秒毎や３０秒毎など他の値を用いることもできる。また、測定位置の時間間隔は、必ずしも一定である必要はなく、多少の変動があってもよい。また、測定タイミングである測定時刻（測定日時）と、測定位置（緯度、経度）とを対応付けて記憶部１２に記憶してもよい。また、測定位置の時間間隔のばらつきが大きい場合には、測定時刻と測定位置とのデータを用いて、実測された測定位置の補間処理を行い、一定周期毎の位置を算出してもよい。 In the control device (control unit) 13 of the first embodiment, the calculation unit 13A calculates each distance between each past measurement position and the current position of the communication terminal 10 as a “movement trajectory pattern” (step S11). . For example, when the storage unit 12 stores information related to positions every minute for the past 60 minutes, that is, when 60 positions are stored, 60 distances according to the following equation (1): L [i] (i = 1 to 60) is calculated. Here, the position i includes longitude X [i] and latitude Y [i]. The current position (the latest position stored in the storage unit 12) is longitude X [0] and latitude Y [0].

Here, each position is represented by longitude and latitude, but is not limited thereto, and may be represented by longitude, latitude, and altitude.
Further, the time interval (cycle) of the measurement position is not limited to the above-described one minute, and other values such as every 10 seconds or every 30 seconds can also be used. Further, the time interval of the measurement position is not necessarily constant, and there may be some variation. Further, the measurement time (measurement date and time) that is the measurement timing and the measurement position (latitude, longitude) may be associated with each other and stored in the storage unit 12. In addition, when the variation in the time interval of the measurement position is large, it is possible to perform the interpolation process of the actually measured measurement position using the data of the measurement time and the measurement position, and calculate the position for every fixed period.

  FIG. 3 is a diagram illustrating an example of a movement trajectory pattern according to the first embodiment. In FIG. 3, the movement trajectory pattern is represented as a graph in which the time difference T from each measurement timing (measurement time) is the horizontal axis with the current time as the reference zero, and the distance L [i] for each calculated measurement position is the vertical axis. Is illustrated. In FIG. 3, for the sake of convenience, only the portion related to the 20 measurement positions close to the current time is shown.

  Next, the determination unit 13B moves the movement trajectory pattern in the determination target period, that is, a distance that is equal to or less than the “first threshold” (predetermined value) among a plurality of distances respectively corresponding to the plurality of measurement positions in the determination target period. Are counted (step S12). Here, for example, a period of −60 minutes ≦ time difference T ≦ −5 minutes is used as the determination target period. That is, for example, a plurality of measurement positions having a measurement timing in a period of −60 minutes ≦ time difference T ≦ −5 minutes are set as “determination target ranges”. In such a determination target period, the distance corresponding to the time difference T = −1, −2, −3, −4 (minutes) is not used for the abnormality determination, and therefore the calculation unit 13A determines the distance L [i] ( Only i = 5 to 60) may be calculated. The “first threshold value” is a distance value that can be considered that the measurement position and the current position are sufficiently close to each other. For example, 80 meters is used. In FIG. 3, the horizontal alternate long and short dash line indicates the “first threshold value”, and in the time range shown in FIG. 3, there are two distances equal to or less than the “first threshold value”. Of course, the above-described determination target period and the “first threshold value” are merely examples, and other values may be used. For example, the determination target period is set to −30 minutes ≦ time difference T ≦ −3 minutes, The “first threshold value” may be 30 meters.

  Next, the determination unit 13B determines whether or not the count value is “predetermined number” (step S13).

  When the count value is greater than or equal to the “predetermined number” (step S13 YES), the notification unit 13C generates an emergency notification signal and outputs it to the transmission unit 14 (step S14). Thereby, the emergency notification signal is transmitted to the terminal of the person to be notified via the transmission unit 14.

  When the count value is less than the “predetermined number” (step S13 NO), the processing step returns to step S11.

  In step S12, the number of distances equal to or smaller than the “first threshold value” is used as the count value. However, the count value may be calculated by another method. In the above-described method, when the communication terminal 10 stays at a position near the current position for a certain time or more, it is determined as an abnormal state. When it is desired to include such a situation in an abnormal state, the above-described method may be performed. On the other hand, when it is not desired to include such a situation in the abnormal state, when the distance L [i] that is continuous in time is continuously equal to or less than the “first threshold value”, the count value of the corresponding part is set to “1”. It is good to. For example, when i = 30, 31, 32, and the distance L [i] is equal to or smaller than the “first threshold value”, the count value of this portion is set to “1” instead of “3”. That is, in the determination target period, the number of minimum points whose distance is equal to or less than the “first threshold value” may be used as the count value.

  In step 13, it is determined whether or not the count value is “predetermined number” or more. However, a different determination method may be used. For example, the calculation unit 13A calculates the total value (total movement distance) of the movement distance of the communication terminal 10 in the determination target period in a step (not shown) prior to step S13. Then, in step S13, the determination unit 13B determines whether the total value is “predetermined value” or more and the count value is “predetermined number” or more. When the total moving distance of the communication terminal 10 is small, it is considered that the monitoring subject is less fatigued. Therefore, this method may be used when it is not desired to include such a situation in an abnormal state. Similarly, in step S13, it may be determined whether the maximum value of the distance L [i] in the determination target period is “predetermined value” or more and the count value is “predetermined number” or more. This method is suitable for the case where it is desired to exclude from the abnormal state when the determination target period does not move so far from the current position.

  As described above, according to the first embodiment, the determination unit 13B in the control device (control unit) 13 is based on a plurality of positions of the communication terminal 10 respectively measured at a plurality of different measurement timings within the determination target period. Based on the movement trajectory pattern and the pattern condition, the state of the monitoring subject carrying the communication terminal 10 is determined.

  With this configuration of the control device (control unit) 13, the state of the monitoring subject can be determined based on whether or not the movement trajectory pattern satisfies the pattern condition. Can be detected. That is, the state of the monitoring subject can be detected regardless of the position of the monitoring subject.

  Specifically, in the control device (control unit) 13, the determination unit 13 </ b> B includes a movement trajectory pattern based on a plurality of positions of the communication terminal 10 and an abnormality pattern, which are respectively measured at a plurality of different measurement timings within the determination target period. Based on the condition, it is determined whether or not the monitoring subject carrying the communication terminal 10 is in an abnormal state.

  With the configuration of the control device (control unit) 13, it is possible to detect an abnormal state of the monitoring target person regardless of the position of the monitoring target person. For example, it is possible to detect an abnormal state even in a place that is outside the living area, such as a place where the person to be monitored visits for the first time.

  In the control device (control unit) 13, the calculation unit 13 </ b> A calculates each distance between each measurement position in the determination target period and the current position of the communication terminal 10 as a movement trajectory pattern. The abnormal pattern condition is that the number of distances that are equal to or less than the first threshold among a plurality of distances in the determination target period calculated for each measurement position in the determination target period by the calculation unit 13A is a predetermined number or more. It is. And the determination part 13B determines with the monitoring subject carrying the communication terminal 10 being in an abnormal state, when the calculated movement locus | trajectory pattern satisfy | fills abnormal pattern conditions. In the first embodiment, the movement trajectory pattern is a change of the distance between the position of the communication terminal 10 at a certain reference time (measurement time) (for example, the current position, the latest position, etc.) and the position at another time. It can be said that it is a pattern. The pattern condition can also be said to be a condition that, among distances corresponding to each of a plurality of time points within a predetermined period, the number of distances whose values are equal to or less than the first threshold is equal to or greater than a predetermined number.

  With the configuration of the control device (control unit) 13, it is possible to reliably detect an abnormal state in which the person being monitored is lost and repeatedly passes through a similar place.

<Modification>
The following modifications can be made to the control device (control unit) 13 of the first embodiment.

  <1> The above description is based on the assumption that one pattern condition is used. However, the present invention is not limited to this, and a plurality of pattern conditions may be used. In this case, the determination unit 13B determines which pattern condition of the plurality of pattern conditions matches (adapts). Then, the notification unit 13C may output a notification signal of a type according to the pattern condition determined to match the movement locus pattern by the determination unit 13B.

  For example, the determination unit 13B stores a first predetermined number and a second predetermined number larger than the first predetermined number. Then, the determination unit 13B has a count value of the first range less than the first predetermined number, the second range greater than the first predetermined number and less than the second predetermined number, and the third range greater than the second predetermined number. Determine (specify) the range that falls. In this case, the first pattern condition is that the count value is in the first range, the second pattern condition is that it is in the second range, and the third pattern condition is that it is in the third range. And the notification part 13C outputs the notification signal according to the range specified by the determination part 13B. This notification signal may be, for example, a notification signal indicating the degree of urgency according to a specified range (that is, a satisfied pattern condition), or a notification directed to a different notification target person according to the specified range It may be a signal.

  Further, as the plurality of pattern conditions, in addition to the pattern conditions of the first embodiment, pattern conditions of the second embodiment and later described later may be used.

  <2> The “first threshold value” and the “predetermined number” may be adjusted according to time, temperature, atmospheric pressure, a situation of a place (whether it is an urban area or a mountain area, etc.). When the time is night and the temperature is low and the atmospheric pressure is low, the “first threshold value” may be adjusted to a value larger than the default value, and the “predetermined number” may be adjusted to a value smaller than the default value. Thereby, it becomes easy to determine that the state of the user is a state to be notified.

<3> The “first threshold value” and the “predetermined number” may be adjusted according to the moving speed of the communication terminal 10 (that is, the moving speed of the person being monitored). For example, when the moving speed of the communication terminal 10 tends to decrease, the “first threshold” is adjusted to a value larger than the default value, and the “predetermined number” is adjusted to a value smaller than the default value. Good. Thereby, when the movement speed of the communication terminal 10 tends to decrease, it is considered that the user's fatigue is accumulated. In such a case, the user's state should be notified. It can be easily determined.
Further, a value (for example, variance) indicating the degree of variation in the moving speed may be calculated, and the “first threshold value” and the “predetermined number” may be adjusted according to this value. For example, when the value indicating the variation degree of the moving speed is larger than a predetermined value, the “first threshold” is adjusted to a value larger than the default value, and the “predetermined number” is adjusted to a value smaller than the default value. Good. Further, as the value indicating the degree of variation in the moving speed is larger, the “first threshold value” may be adjusted to a larger value, or the “predetermined number” may be adjusted to a smaller value. As a result, the abnormal state is more easily notified. It is considered that the greater the degree of variation in the moving speed, the more likely the user's behavior is more irregular and more confusing. For this reason, when the variation degree of the moving speed is large, it is desirable to make it easier to notify the abnormal state.

<4> The “first threshold value” and the “predetermined number” may be adjusted according to a time series change of the distance L [i]. For example, the distance L [i] may be adjusted according to the time interval (cycle) at which the distance L [i] is minimized. Specifically, a value (for example, variance) indicating the degree of variation in the time interval (that is, the period in which the minimum appears) corresponding to each two minimum points of the distance L [i] is calculated, and according to this value , “First threshold” and “predetermined number” are adjusted. For example, when the value indicating the degree of variation in the interval is larger than a predetermined value, the “first threshold” is adjusted to a value larger than the default value, and the “predetermined number” is adjusted to a value smaller than the default value. Good. In addition, the “first threshold value” may be adjusted to a larger value or the “predetermined number” may be adjusted to a smaller value as the value indicating the degree of variation in the interval is larger. As a result, the abnormal state is more easily notified. It is considered that the greater the variation degree of the interval, the higher the possibility that the user's behavior is more irregular and more confusing. For this reason, when the degree of variation in the interval is large, it is desirable to make it easier to notify the abnormal state.
Further, the “first threshold value” and the “predetermined number” may be adjusted according to the difference between the maximum value and the minimum value of the distance L [i]. For example, when the difference between the maximum value and the minimum value is large (greater than a predetermined value), the user is moving over a wide range and fatigue is considered to have accumulated. Or the “predetermined number” is adjusted to a small value to make it easier to notify the abnormal state.

Second Embodiment
In the second embodiment, unlike the first embodiment, a “circular pattern condition” in which the movement trajectory pattern is regarded as a circle having a predetermined size or more is used as the abnormal pattern condition. The basic configuration of the control unit (control device) and communication terminal of the second embodiment is the same as that of the control unit (control device) 13 and communication terminal 10 of the first embodiment, and will be described with reference to FIG.

<Configuration example of control device>
In the control unit (control device) 13 of the second embodiment, the calculation unit 13A calculates each distance between each measurement position of the communication terminal 10 and the current position of the communication terminal 10. Furthermore, the calculation unit 13A calculates the movement direction (that is, the movement vector) of the communication terminal 10 at each measurement timing using each of the two measurement positions with the closest measurement timing. That is, the calculation unit 13A calculates a vector starting from the (n-1) th measurement position and ending at the nth measurement position as a movement vector at the nth measurement timing.

  The determination unit 13B of the second embodiment sets the determination target period between the measurement timing of the measurement position where the distance from the current position (latest position) of the communication terminal 10 is equal to or less than the “second threshold” and the current time. That is, a plurality of positions from the measurement position where the distance from the current position of the communication terminal 10 is equal to or less than the “second threshold” to the current position is set as the “determination target range”. The “second threshold value” is a distance value that can be considered that the measurement position and the current position are sufficiently close to each other, like the first threshold value. And the determination part 13B determines whether a movement locus | trajectory pattern satisfy | fills abnormal pattern conditions. Here, the abnormal pattern condition of the second embodiment is a “circular pattern condition” in which the movement trajectory pattern is regarded as a substantially circular shape having a predetermined size or more. The reason why such a circular pattern condition is an abnormal pattern condition is that it is considered that there is a high possibility that the person to be monitored is in a ring wandering state. Ring wandering is a phenomenon in which when a person crawls in a place with poor visibility, he or she unconsciously draws a circle and returns to the original position. When the size of the circle is small, it is easy for the person to be monitored to perceive that they have repeatedly passed through the same place. The need to judge as is higher.

  Note that the notification unit 13C of the second embodiment is configured to perform processing in the same manner as in the first embodiment.

<Operation example of control device>
An example of the processing operation of the control device (control unit) 13 of the second embodiment having the above configuration will be described. FIG. 4 is a flowchart illustrating an example of a processing operation of the control device according to the second embodiment.

In the control device (control unit) 13 of the second embodiment, the calculation unit 13A uses the measurement position data stored in the storage unit 12 to calculate each measurement position of the communication terminal 10 and the current position of the communication terminal 10. The distance is calculated, and the movement direction (that is, the movement vector) of the communication terminal 10 at each measurement timing is calculated using each of the two measurement positions whose measurement timings are temporally adjacent (step S21). The storage unit 12 stores data of measurement positions at least for a predetermined period retroactively from the present. This predetermined period is referred to as a process target period. Since new data is sequentially added to the storage unit 12, data outside the processing target period may be deleted.
For example, the first movement vector is calculated (created) with the oldest measurement position in the processing target period as the start point and the second oldest measurement position as the end point. Similarly, by repeating the process of calculating (creating) the second movement vector with the second oldest measurement position as the start point and the third oldest measurement position as the end point, all the movement vectors are calculated. In the following description, it is assumed that there are n measurement positions (measurement points) and n−1 movement vectors in the processing target period. Further, the oldest measurement position in the processing target period is P1, the second oldest measurement position is P2, the second newest measurement position is P (n-1), and the newest measurement position (current position) is Pn. To do. Further, a movement vector from P1 to P2 is V1, a vector from P2 to P3 is V2, and a vector from P (n-1) to Pn is V (n-1). Further, V (n−1) is referred to as a current movement vector or the latest movement vector, and other movement vectors are referred to as past movement vectors.

  Next, in step S22, the determination unit 13B of the second embodiment determines whether there is a distance equal to or smaller than the “second threshold” in the distance (the distance between the current position and the past position) calculated by the calculation unit 13A. judge. If it exists, a measurement position that is equal to or less than the “second threshold” is identified as an “approach position” and used in the following processing. When there are a plurality of distances (measurement positions) that are equal to or less than the “second threshold value”, one of the measurement positions corresponding to the shortest distance is selected as the approach position. That is, in step S <b> 22, the determination unit 13 </ b> B determines whether or not an approach position whose distance from the current position is equal to or less than the “second threshold” can be specified. The range from the approach position to the current position is the “determination target range”, and the interval between the measurement timing of the approach position and the current is the determination target period.

  When the approach position satisfying the above conditions can be specified (step S22 YES), the process proceeds to step S23. In step S23, the determination unit 13B calculates an angle formed by the latest movement vector and the movement vector corresponding to the approach position specified in step S22. For example, when the second oldest measurement position P2 is the approach position, the movement vector corresponding to P2 (movement vector starting from P2) is V2. In this case, an angle θ2 formed by the latest movement vector V (n−1) and V2 is calculated. Then, the determination unit 13B determines whether or not the angle θ2 is included in the predetermined range. When the angle is calculated without a sign, the predetermined range is, for example, “30 degrees or less (0 degree or more and 30 degrees or less)”. In addition, when calculating a signed angle in which the angle rotated to the right side is defined as plus and the angle rotated to the left side is defined as minus with respect to the direction of V (n−1), the predetermined range is, for example, , “−30 degrees or more and +30 degrees or less”.

  That is, in step S23, the determination unit 13B calculates an angle formed by the movement vector corresponding to the current position (latest movement vector) and the movement vector corresponding to the approach position, and the angle is included in a predetermined range. It is determined whether or not. Here, the predetermined range is a relatively narrow range centered on 0 degree (a range close to 0 degree). That is, it is determined whether or not the amount of change in the moving direction during the determination target period is included in the predetermined range. This process corresponds to the determination unit 13B determining whether or not the communication terminal 10 has made a full turn within the determination target period. When the communication terminal 10 makes a round, there is an approach position that is close to the current position, and the direction of the movement vector corresponding to the current position and the direction of the movement vector corresponding to the approach position are substantially the same. On the other hand, when there is no distance equal to or smaller than the “second threshold” in the distance calculated by the calculation unit 13A and the approach position cannot be specified (NO in step S22), the processing step proceeds to step S26. In step S2X, the control unit 13 performs a “sleep” process that pauses the process for a predetermined time. This predetermined time may be set based on the time required for the measurement position to be updated. The process returns from step S26 to step S21. That is, the calculation process of the distance and the movement vector by the calculation unit 13A is continued.

  Next, when it is determined that the angle between the vector corresponding to the current position and the vector corresponding to the approach position is included in the predetermined range (YES in step S23), the process proceeds to step S24. In step S <b> 24, the determination unit 13 </ b> B specifies the farthest position, which is the measurement position having the longest distance from the current position, with respect to the measurement position included in the determination target range. Then, it is determined whether or not the distance from the farthest position is equal to or greater than the “third threshold value” (step S24). In step S23 and step S24 described above, determination using a circular pattern condition is performed. If the condition determination in step S24 is satisfied, the monitoring target person moves while drawing a somewhat large circular pattern, so that the person himself / herself is not aware and can determine that there is a high possibility of being in a ring wandering state. On the other hand, when it is determined that the angle between the vector corresponding to the current position and the vector corresponding to the approach position is not included in the predetermined range (step S23 NO), the processing step proceeds to step S26, and then Return to step S21.

  When the distance between the farthest position and the current position is equal to or greater than the “third threshold” (YES in step S24), the notification unit 13C generates an emergency notification signal and outputs the emergency notification signal to the transmission unit 14 (step S25). Thereby, the emergency notification signal is transmitted to the terminal of the person to be notified via the transmission unit 14.

  On the other hand, when the distance between the farthest position and the current position is less than the “third threshold value” (NO in step S24), the processing step proceeds to step S26, and then returns to step S21.

  As described above, according to the second embodiment, the determination unit 13B in the control device (control unit) 13 determines the measurement position (approach position) whose distance from the current position of the communication terminal 10 is equal to or less than the “second threshold value”. The period between the measurement timing and the current time is set as the determination target period, and it is determined whether or not the movement trajectory pattern in the determination target period satisfies the abnormal pattern condition. The abnormal pattern condition is a “circular pattern condition” in which the movement trajectory pattern is regarded as a substantially circular shape having a predetermined size or more. Here, “more than a predetermined size” is determined by the distance between the farthest position and the current position being “third threshold value” or more, and this distance corresponds to a substantially circular diameter. Further, “considered as a substantially circular shape” is determined by the fact that the angle between the vector corresponding to the current position and the vector corresponding to the approach position is “included in a predetermined range (below a predetermined value)”. The Therefore, the “circular pattern condition” of the second embodiment includes the change amount of the moving direction in the determination target period within a predetermined range, and is the farthest from the current position among the measurement positions corresponding to the determination target period. There is a condition that the distance between the measured position and the current position is not less than the “third threshold value”.

  With the configuration of the control device (control unit) 13 of the second embodiment, it is possible to reliably detect an abnormal state in which the monitoring subject is ring wandering.

<Modification>
The following modifications may be made to the control device (control unit) 13 of the second embodiment.

  <1> In the above description, in the “circular pattern condition”, the distance between the measurement position that is included in the movement trajectory pattern in the determination target period and is farthest from the current position is equal to or greater than the “third threshold value”. However, the present invention is not limited to this. Instead, “the movement distance of the communication terminal 10 in the determination target period is equal to or greater than a predetermined threshold” may be used. . As the “movement distance within the determination target period”, a value (total value) obtained by adding all the distances between the two measurement positions having the closest measurement timings within the determination target period can be used.

<Third Embodiment>
In the third embodiment, as in the second embodiment, a “circular pattern condition” in which the movement locus pattern is regarded as a circle having a predetermined size or more is used as the abnormal pattern condition. However, the circular pattern conditions of the third embodiment are different from those of the second embodiment. The basic configuration of the control unit (control device) and communication terminal of the third embodiment is the same as that of the control unit (control device) 13 and communication terminal 10 of the first embodiment, and will be described with reference to FIG.

<Configuration example of control device>
In the control unit (control device) 13 according to the third embodiment, the calculation unit 13A includes, for a plurality of measurement positions acquired from the storage unit 12, distances between two measurement positions adjacent to each other in measurement timing (that is, n−1). The distance between the n th measurement position and the n th measurement position) is calculated.

  Further, the calculation unit 13A calculates the distance between each measurement position acquired from the storage unit 12 and the current position of the communication terminal 10.

  Further, the calculation unit 13A is located in a direction orthogonal to the direction connecting the nth measurement position and the immediately preceding n−1th measurement position with respect to each measurement position (nth measurement position), and The right boundary point (PR) and the left boundary point (PL), which are two points away from the nth measurement position by a predetermined distance (corresponding to r1 in FIG. 6A described later), are calculated (recorded). Here, the right side is the right boundary point and the left side is the left boundary point with respect to the direction (that is, the traveling direction) from the (n-1) th measurement position to the nth measurement position. The right boundary point and the left boundary point are used to determine the degree of turn in the traveling direction in the movement trajectory of the communication terminal 10, and are therefore referred to as “right turn determination point” and “left turn determination point”. You can also.

  In addition, when the determination target period is set, the calculation unit 13A calculates the moving distance of the communication terminal 10 in the determination target period. As the “movement distance within the determination target period”, a value (total value) obtained by adding all the distances between two measurement positions whose measurement timings within the determination target period are temporally adjacent can be used.

  The determination unit 13B of the third embodiment sets the determination target period between the measurement timing of the measurement position where the distance from the current position of the communication terminal 10 is equal to or less than the “fourth threshold value” and the current time. That is, a plurality of positions from the measurement position where the distance from the current position of the communication terminal 10 is equal to or less than the “fourth threshold value” to the current position is set as the “determination target range”. The “fourth threshold value” is a distance value that can be considered that the measurement position and the current position are sufficiently close to each other, like the first threshold value.

  Then, the determination unit 13B determines whether or not the movement trajectory pattern in the determination target period satisfies an abnormal pattern condition (here, a circular pattern condition). Here, the circular pattern condition of the third embodiment is that the moving distance of the determination target terminal in the determination target period is equal to or greater than the “fifth threshold value” and is the shortest distance between each measurement position in the determination target period. The condition that there is one or more left boundary points with a "sixth threshold" or more and one or more right boundary points with the shortest distance between each measurement position being "sixth threshold" or more It is. The “sixth threshold value” corresponds to a radius r2 in FIG. Here, the above r1 and r2 may be the same or different.

  In other words, in the circular pattern condition of the third embodiment, when N (N is a natural number of 2 or more) measurement positions are included in the determination target period, K (K = 1,... N) With respect to the measurement position, it is located in a direction orthogonal to the vector (direction) having the K-1 measurement position as the start point and the Kth measurement position as the end point, and a predetermined distance from the Kth measurement position. The first point (PR) and the second point (PL), which are two points separated by a distance, are set for all K. The circular pattern condition of the third embodiment is that the movement distance of the determination target terminal in the determination target period is equal to or greater than the “fifth threshold value” and M (M is any natural number equal to or less than N) -th measurement. There is an Mth measurement position in which the right boundary point and the left boundary point set as the position are not included in the range having the “sixth threshold” as a radius based on any measurement position other than the Mth measurement position. That's it.

  Note that the notification unit 13C of the third embodiment is configured to perform processing in the same manner as in the first embodiment.

<Operation example of control device>
An example of the processing operation of the control device (control unit) 13 of the third embodiment having the above configuration will be described. FIG. 5 is a flowchart illustrating an example of a processing operation of the control device according to the third embodiment. FIG. 6 is a diagram for explaining the processing operation of the control device of the third embodiment. In the example illustrated in FIG. 6A, it is assumed that the storage unit 12 stores ten measurement positions P0 to P9.

  First, the determination unit 13B sets the order n to 1 (step S31). In addition, about the oldest measurement position P0 memorize | stored in the memory | storage part 12, since the above-mentioned vector cannot be produced, n is set to 1 and a process is started from P1.

  The calculation unit 13A acquires the 1 (= n) th measurement position from the storage unit 12 (step S32).

  The calculation unit 13A sets a right boundary point and a left boundary point for the 1 (= n) th measurement position (step S33). Specifically, as illustrated in FIG. 6A, the calculation unit 13A sets a vector V1 having the measurement position P0 as a start point and the next measurement position P1 as an end point. Then, the calculation unit 13A sets a right boundary point and a left boundary point that are two points that are located in a direction orthogonal to the vector V1 and that are separated from the measurement position P1 by a predetermined distance r1. The calculation unit 13A sets points used for determination of such circular pattern conditions for each measurement position.

  When the value of n is small, there is a high possibility that it will be determined as NO in the determination process in step S34 described later, the process step proceeds to step S35, and the value of n is incremented (step S35). Then, the processing step returns to step S32. That is, the right boundary point and the left boundary point are set for the measurement positions sequentially acquired from the storage unit 12.

  The determination unit 13B determines whether or not the nth measurement position is within the fourth threshold from any of the past measurement positions (step S34). That is, the determination unit 13B determines whether or not the distance between the nth measurement position and any of the past measurement positions (that is, the linear distance) is equal to or less than the “fourth threshold value”. In the example of FIG. 6A, the measurement position P9 (current position) is approaching the past measurement position P2, and the condition of step S34 is satisfied.

  When the n-th measurement position is within the fourth threshold from any of the past measurement positions (step S34 YES), the determination unit 13B determines that the movement distance of the communication terminal 10 in the determination target period is equal to or greater than the “fifth threshold”. It is determined whether or not there is (step S36). Here, the determination unit 13B sets a period between two measurement timings corresponding to the two measurement positions determined to have approached in step S34 as a determination target period. That is, in the example of FIG. 6A, all measurement positions from the measurement position P2 to the measurement position P9 are set as the determination target period (that is, the determination target range).

  When the movement distance of the communication terminal 10 in the determination target period is equal to or greater than the “fifth threshold” (step S36 YES), the determination unit 13B sets the right boundary point and the left boundary point set for the measurement position in the determination target period. For all, the right boundary point and the left boundary point whose distance from any measurement position within the determination target period is less than the “sixth threshold value” are deleted (step S37). In the example of FIG. 6A, PL4 and PL2 are deleted because they are close to P5 and P9, respectively. In FIG. 6A, PL2 and PL4 are indicated by black circles. On the other hand, when the moving distance of the communication terminal 10 during the determination target period is less than the “fifth threshold value” (step S36 NO), the processing step proceeds to step S35.

  The determination unit 13B has one or more right boundary points and one left boundary point remaining without being deleted in step S37 with respect to the right boundary point and the left boundary point set for the measurement position within the determination target period. It is determined whether or not it exists (step S38).

  When there are one or more right boundary points and left boundary points that have not been deleted in step S37 with respect to the right boundary point and the left boundary point set for the measurement position within the determination target period (step S37) (S38 YES), the notification unit 13C generates an emergency notification signal and outputs it to the transmission unit 14 (step S39). That is, if one or more right boundary points and one or more left boundary points remain with respect to the right boundary point and the left boundary point set for the measurement position within the determination target period, the circle having the radius r2 In this case, an emergency notification signal is transmitted.

On the other hand, FIG. 6B shows an example in which one of the right boundary point and the left boundary point set for the measurement position within the determination target period is not deleted and remains. . In the example shown in the figure, the five measurement positions P1 to P5 are the determination target ranges, and the left boundary points corresponding to them are PL1 to PL5. Since all the left boundary points PL1 to PL5 of the determination target range are deleted, they are indicated by black circles. In the example shown in the figure, the determination in step S38 is “NO”, and the process proceeds to step S40. That is, with respect to the right boundary point and the left boundary point set for the measurement position within the determination target period, when all of the right boundary point and the left boundary point are deleted, the circle having the radius r2 (sixth threshold) is used. In this case, the emergency notification signal is not transmitted. Here, as described above, the predetermined distance r1 and the radius r2 may be the same value or different. For example, if r2 is set to a value slightly smaller than r1, it can be determined as a movement trajectory pattern to be emergency even if the fluctuation of the movement trajectory is somewhat large.
In step S <b> 40, the control unit 13 performs a “sleep” process that pauses the process for a predetermined time. This predetermined time may be set based on the time required for the measurement position to be updated. And it returns to step S31 from step S40, and a process is repeated using new measurement position data.

  FIG. 7 is a diagram showing a movement trajectory pattern different from that in FIG. FIG. 7 shows a case where the person to be monitored approaches P3 when starting from P0 and moving to P19. In the example of FIG. 7, the linear distance between P3 and P19 is equal to or less than the fourth threshold (for example, 5 m or less). Furthermore, all of the right boundary point and the left boundary point existing inside the circle with the radius r2 from each of the 17 measurement positions P3 to P19 in the determination target period are deleted. In the example of FIG. 7, left boundary points exist near P9 and P14, and these left boundary points (indicated by black circles in FIG. 7) are deleted. Further, right boundary points exist near P11 and P12, and these right boundary points (indicated by black circles in FIG. 7) are deleted.

  The above processing calculates the distance from a certain PR to each P (P3 to P19) to be processed for 17 PRs from PR3 to PR19, and the shortest distance from the PR to P is the radius r2. When it is above, it can be said that it is determined that the PR is effective. Similarly, the distance from a certain PL to each P (P3 to P19) to be processed is calculated, and when the shortest distance from the PL to P is greater than or equal to the radius r2, it is determined that the PL is effective. It can be said. Then, when one or more effective PRs exist and one or more effective PLs exist, it can be determined that the movement trajectory pattern is an emergency target.

  As described above, according to the third embodiment, in the control device (control unit) 13, the determination unit 13 </ b> B determines the measurement timing of the measurement position whose distance from the current position of the communication terminal 10 is “fourth threshold value” or less and the current Is determined as a determination target period, and it is determined whether or not the movement trajectory pattern in the determination target period satisfies an abnormal pattern condition (here, a circular pattern condition). The circular pattern condition is that the moving distance of the communication terminal 10 in the determination target period is not less than the fifth threshold, and the shortest distance between each measurement position in the determination target period is not less than the sixth threshold. And there is one or more right boundary points having the shortest distance between each measurement position and the sixth threshold value or more. The left boundary point is a point calculated for each measurement position within the determination target period, and is located in a direction orthogonal to the traveling direction between two adjacent measurement positions and the measurement position with respect to the traveling direction. It is a point left by a predetermined distance on the left side. The right boundary point is a point that is symmetrical with the left boundary point with respect to the measurement position.

  With the configuration of the control device (control unit) 13, it is possible to reliably detect an abnormal state in which the monitoring target is ring wandering using the measurement position on a gentle curve in the movement locus as a circular pattern condition. Can do.

<Modification>
In the above description, the radius r2 is assumed to be a constant value at all measurement positions, that is, the radius r2 is fixed. However, the radius r2 is not limited to this and may be variable depending on conditions. For example, it may be varied depending on the distance from the start point or the elapsed time since the start. For example, immediately after the start, the user's physical strength is also low, so there is little possibility of getting lost. Then, it may be determined as an emergency target.

<Fourth embodiment>
In the fourth embodiment, as in the second embodiment and the third embodiment, a “circular pattern condition” in which the movement trajectory pattern is regarded as a substantially circular shape having a predetermined size or more is used as the abnormal pattern condition. However, the circular pattern conditions of the fourth embodiment are different from those of the second and third embodiments. The basic configuration of the control unit (control device) and communication terminal of the fourth embodiment is the same as that of the control unit (control device) 13 and communication terminal 10 of the first embodiment, and will be described with reference to FIG.

  The calculation unit 13A of the fourth embodiment has one measurement position as a starting point for each of the two measurement positions adjacent to the front and rear of the plurality of measurement positions included in the determination target period, and the measurement timing is higher than that of the one measurement position. A movement vector having the other measurement position later as an end point is calculated. In the example of FIG. 8, first, a movement vector having the measurement position P0 as the start point and the measurement position P1 as the end point is calculated. Then, the start point of the movement vector is sequentially switched from the measurement positions P1 to P8, and the movement vector for each of the two adjacent measurement positions is calculated.

  Then, the calculation unit 13A calculates a signed angle that is an angle formed by two adjacent movement vectors among the plurality of calculated movement vectors. In the example of FIG. 8, the angle formed by the movement vector having the measurement position P1 as the start point and the measurement position P2 as the end point with respect to the movement vector having the measurement position P0 as the start point and the measurement position P1 as the end point is −θ1. In addition, an angle formed by a movement vector having the measurement position P2 as a start point and the measurement position P3 as an end point with respect to a movement vector having the measurement position P1 as a start point and the measurement position P2 as an end point is −θ2. Here, the angle between the previous movement vector and the next movement vector is calculated, and when the direction is changed to the left with respect to the previous movement vector. The sign is negative (minus) and positive when the direction is changed to the right. θ1 and θ2 are numerical values of 0 or more. Note that the sign can be arbitrarily determined.

  The determination unit 13B according to the fourth embodiment sets a determination target period between the measurement timing of the measurement position whose distance from the current position of the communication terminal 10 is equal to or less than the “seventh threshold value” and the current time. That is, a plurality of measurement positions from the measurement position where the distance from the current position of the communication terminal 10 is equal to or less than the “seventh threshold” to the current position is set as the “determination target range”. In the example of FIG. 8, the measurement position P0 and the measurement position P9 are close to each other, and all the measurement positions from the measurement position P0 to the measurement position P9 are set as the determination target period (that is, the determination target range).

  Then, the determination unit 13B determines whether or not the movement trajectory pattern in the determination target period satisfies an abnormal pattern condition (here, a circular pattern condition). Specifically, with respect to each of two measurement positions adjacent to each other before and after the plurality of measurement positions included in the determination target period, the other measurement position starts from one measurement position and the measurement timing is later than the one measurement position. Each of the movement vectors having the measurement position as an end point is calculated, and a signed angle that is an angle formed by two adjacent movement vectors among the calculated plurality of movement vectors is calculated. Calculate the total angle. The circular pattern condition according to the fourth embodiment is that the movement distance of the communication terminal 10 in the determination target period is equal to or greater than the “eighth threshold value” and the calculated total value is within the “first angle range”. To do. Here, the “first angle range” is a range in which the moving azimuth can be regarded as one round, and is, for example, “330 ° to 390 ° and −330 ° to −390 °”. Alternatively, after calculating the absolute value of the total value, the “first angle range” may be set to “330 ° to 390 °”. Thereby, subtle fluctuations in the movement trajectory can be allowed.

  Here, another example of the movement trajectory is shown in FIG. In the example of FIG. 9, the angle formed by the movement vector having the measurement position P1 as the start point and the measurement position P2 as the end point with respect to the movement vector having the measurement position P0 as the start point and the measurement position P1 as the end point is −θ1. On the other hand, the angle formed by the movement vector having the measurement position P2 as the start point and the measurement position P3 as the end point with respect to the movement vector having the measurement position P1 as the start point and the measurement position P2 as the end point is + θ2. If the absolute value of the sum of the signed angles is calculated when the movement vector exhibits such behavior over the entire movement trajectory, both the positive and negative values cancel each other, and the total absolute value does not become a large value. Do not take values close to °. For this reason, the circular pattern conditions of the fourth embodiment described above can eliminate the case where the movement vector exhibits such behavior over the entire movement locus. On the other hand, when the movement vector shows such behavior only in a part of the movement locus, the total value of the signed angles in the determination target period can take a large value, and therefore takes a value close to 360 °. obtain. Therefore, the circular pattern condition of the fourth embodiment can allow a slight fluctuation of the movement locus.

  According to the fourth embodiment as described above, in the control device (control unit) 13, the determination unit 13 </ b> B determines the measurement timing of the measurement position whose distance from the current position of the communication terminal 10 is equal to or less than the “seventh threshold value” and the current Is determined as a determination target period, and it is determined whether or not the movement trajectory pattern in the determination target period satisfies an abnormal pattern condition (here, a circular pattern condition). The circular pattern conditions are as described above.

  With the configuration of the control device (control unit) 13, it is possible to reliably detect an abnormal state in which the person being monitored is ring wandering using a circular pattern condition as moving in a large circle while bending in a predetermined direction. be able to. Furthermore, since the circular pattern condition is that “the total value of the calculated plurality of signed angles falls within the first angle range”, the case where the entire moving locus is meandered On the other hand, it is possible to reliably detect the case that meanders only in a part of the movement locus as a circular pattern. In other words, the circular pattern condition described above can tolerate subtle fluctuations in the movement trajectory.

<Modification>
The following modifications can be made to the control device (control unit) 13 of the fourth embodiment.

  <1> In the circular pattern condition of the fourth embodiment, the calculation target of the total value may be “a signed angle in which the absolute value is within the second angle range among the plurality of calculated signed angles”. That is, for each of the two measurement positions adjacent to each other before and after the plurality of measurement positions included in the determination target period, the other measurement position starting from one measurement position and having a measurement timing later than the one measurement position Each of the movement vectors as the end points is calculated, and a signed angle that is an angle formed by two adjacent movement vectors among the calculated plurality of movement vectors is calculated, and among the calculated plurality of signed angles, The total value of the signed angles whose absolute values fall within the “second angle range” is calculated. <Modification 1> of the fourth embodiment is that the movement distance of the communication terminal 10 in the determination target period is equal to or greater than the “eighth threshold value” and the calculated total value falls within the “first angle range”. The circular pattern condition is as follows. Here, the “second angle range” is, for example, a range of −40 ° to 20 °, and acts as a restriction that the direction is not extremely changed (that is, the U-turn is not made) at one place on the movement trajectory pattern.

  <2> In the above description, “the movement distance of the communication terminal 10 in the determination target period is equal to or greater than the eighth threshold” in the “circular pattern condition” is part of the condition, but is not limited thereto. Instead, “the distance between the measurement position included in the movement trajectory pattern in the determination target period and farthest from the current position and the current position is equal to or greater than a predetermined threshold” may be used. For example, in the example of FIG. 8, the distance r3 corresponds to a predetermined threshold, and the distance between the measurement position P4 farthest from the current position P9 and the current position P9 is larger than the distance r3.

<Other embodiments>

  <1> The condition described as the “abnormal pattern condition” in the first to fourth embodiments may be used as the “normal pattern condition”, depending on the usage situation. In this case, when the “normal pattern condition” is not satisfied, it is determined that the user state should be notified.

  <2> FIG. 10 is a diagram illustrating a hardware configuration example of the communication terminal. In FIG. 10, the communication device 100 includes a GPS signal receiving circuit 101, a memory 102, a processor 103, and a communication circuit 104.

The GPS signal reception unit 11, the storage unit 12, and the transmission unit 14 of the communication terminal 10 described in the first to fourth embodiments are realized by the GPS signal reception circuit 101, the memory 102, and the communication circuit 104, respectively. The The control unit (control device) 13 of the communication terminal 10 is realized by the processor 103 reading and executing a program stored in the memory 102.
In addition, although the example which acquires the position of the communication terminal 10 using GPS was demonstrated in 1st Embodiment-4th Embodiment, you may use another method. For example, the position of the communication terminal 10 may be acquired using information on a mobile phone base station or a wireless LAN access point used by the communication terminal 10. That is, the GPS is only an example of a unit that acquires position information. The communication terminal 10 does not necessarily need to include the GPS signal receiving unit 11 and the GPS signal receiving circuit 101, and may be provided with a unit that can acquire position information. Therefore, it can be said that the GPS signal receiving unit 11 is a position information acquiring unit. Further, it can be said that the GPS signal receiving circuit 101 is a position information acquisition circuit.

<3> In the first to fourth embodiments, the description has been made on the assumption that the control device (control unit) 13 is mounted on the communication terminal 10. However, the present invention is not limited to this. The (control unit) 13 may be mounted on a device (for example, a server) different from the communication terminal 10 that is the determination target terminal. In this case, it is only necessary that the control device (server or the like) can acquire the position information of the determination target device (determination target terminal). The determination target device and the control device may be integrated or separate. Further, a plurality of determination target devices may be managed by the control device, and a notification signal may be output for each determination target device.
<4> In the first to fourth embodiments, the example in which the monitoring target person carries the communication terminal 10 has been described. However, the present invention is not limited to this. For example, a moving body such as an automobile, a motorcycle, and a ship may be a determination target device (determination target terminal), and a control device (control unit) may be mounted on the moving body. That is, the determination target device (determination target terminal) does not have to be carried by a human, and may be any device that can move, such as being incorporated in an in-vehicle device.

  Note that the present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 10 Communication terminal 11 GPS signal receiving part 12 Storage part 13 Control part 13A Calculation part 13B Determination part 13C Notification part 14 Transmission part

Claims (10)

Judgment of determining a state of a user who uses the determination target device based on a movement trajectory pattern based on a plurality of positions of the determination target device respectively measured at a plurality of different measurement timings within a determination target period and a pattern condition And
A notification unit that outputs a notification signal according to the determined user status;
A control device comprising: A calculation unit that calculates each distance between each measurement position of the determination target device and a current position of the determination target device as the movement trajectory pattern;
The pattern condition is a condition in which the number of distances that are equal to or less than a first threshold among a plurality of distances calculated by the calculation unit is a predetermined number or more,
The determination unit determines that the state of the user is in a state to be notified when the movement trajectory pattern satisfies the pattern condition,
The control device according to claim 1. The pattern condition is a circular pattern condition in which the movement trajectory pattern is regarded as a substantially circular shape having a predetermined size or more,
The determination unit determines that the state of the user is in a state to be notified when the movement locus pattern satisfies the circular pattern condition,
The control device according to claim 1. The determination unit sets the determination target period between the measurement timing of the measurement position whose distance from the current position of the determination target device is equal to or less than a second threshold and the current time.
The circular pattern condition is that a change in the movement direction of the determination target device in the movement trajectory pattern is within a predetermined range, and the position that is included in the movement trajectory pattern and is farthest from the current position is the current position. The condition is that the distance or the moving distance in the determination target period is a third threshold or more.
The control device according to claim 3. The determination unit sets the determination target period between a measurement timing of a position where the distance from the current position of the determination target device is equal to or less than a fourth threshold and the current time.
Each of the plurality of measurement positions within the determination target period is located in a direction orthogonal to the traveling direction between two adjacent measurement positions, and is separated from the traveling direction by a predetermined distance on the right and left sides of the measurement position. Left boundary point and right boundary point
There is one or more left boundary points in which the movement distance of the determination target device in the determination target period is equal to or greater than a fifth threshold and the shortest distance to each measurement position is equal to or greater than a sixth threshold, and each measurement A condition in which one or more right boundary points having a shortest distance to a position that is equal to or greater than the sixth threshold is present as the circular pattern condition;
The control device according to claim 3. The determination unit sets the determination target period between a measurement timing of a position where the distance from the current position of the determination target device is equal to or less than a seventh threshold and the current time.
For each of the two measurement positions adjacent to each other before and after the plurality of measurement positions included in the determination target period, the first measurement position is the start point, and the other measurement position whose measurement timing is later than the one measurement position is the end point. Each of the movement vectors is calculated, and an angle formed by each two adjacent movement vectors among the plurality of movement vectors calculated is calculated, and a total value of the calculated plurality of angles is calculated.
The distance between the current position and the position that is included in the movement distance or the movement trajectory pattern of the determination target device in the determination target period and is farthest from the current position is equal to or greater than an eighth threshold; and
The condition that the calculated total value falls within the first angle range is the circular pattern condition.
The control device according to claim 3. In the circular pattern condition, the calculation target of the total value is an angle that falls within a second angle range among the calculated angles.
The control device according to claim 6. The pattern condition includes a plurality of pattern conditions,
The determination unit determines which pattern condition of the plurality of pattern conditions the moving locus pattern meets,
The notification unit outputs a type of notification signal according to a pattern condition determined by the determination unit to match the movement trajectory pattern.
The control device according to claim 1. A control method executed by a control device, comprising:
Based on a movement trajectory pattern based on a plurality of positions of a determination target device measured at a plurality of different measurement timings within a determination target period, and a pattern condition, a state of a user who uses the determination target device is determined,
Outputting a notification signal according to the determined state of the user;
Control method. Based on a movement trajectory pattern based on a plurality of positions of a determination target device measured at a plurality of different measurement timings within a determination target period, and a pattern condition, a state of a user who uses the determination target device is determined,
Outputting a notification signal according to the determined state of the user;
A control program for causing a computer to execute processing.

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