JP2011048493A - Locating system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a locating system acquiring location information of a person to be managed, by use of a low-output communication means, and easily coping with a change of a monitoring area. <P>SOLUTION: The locating system includes a monitoring center 15 for processing location information received from a transmitter/receiver 21 worn by a worker 12, and acquiring a location of the worker 12 based on the processing. A relay device 14 relaying transmission of a signal between the transmitter/receiver 21 and the monitoring center 15 is provided between them. Based on the location information of the worker 12, whether the worker 12 has departed from a virtual area. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a position grasping system that makes it possible to grasp the position of a managed person such as a child who is going to and from school or in a school, an operator in an outdoor workplace, etc. under a small number of managers.

  Conventionally, for example, a configuration as disclosed in Patent Document 1 has been proposed as a crime prevention system that grasps the position of a child in school and contacts a guardian or a school official. In this conventional configuration, a monitoring center for receiving position information from a mobile phone as a ZigBee terminal carried by a child is provided. Then, in the monitoring center, based on the position information from the mobile phone, it monitors the state in which the children are leaving the group and predicts the point and time when the child is alone, Contact the school officials.

  In the second embodiment described in Patent Document 1, a function for determining an abnormality is added to the monitoring center. Then, at the monitoring center, it is determined whether or not the child is leaving school on a predetermined school road, and when it deviates from the school road by a predetermined distance or more, the parent or school official is notified of the abnormal state. ing.

JP 2007-193710 A

  However, when the conventional security system described in Patent Document 1 is applied to grasp the position of the worker in the workplace, it is necessary for the worker to have a mobile phone such as a PHS (Personal Handyphone System). Therefore, as the system operates, communication costs are incurred for transmitting location information and the like. In particular, when managing a large number of workers at the same time, the costs are incurred for each worker, which is inconvenient in terms of operation costs. In addition, since the communication area is restricted by the position of the base station, there is a problem that the management area corresponding to the work place cannot be set flexibly, and therefore, it is not possible to easily cope with the change of the work place.

  The present invention has been made paying attention to such problems existing in the prior art. The purpose is to provide a position grasping system that can grasp the position information of the managed person at low cost and can easily cope with the change of the management area.

  In order to achieve the above object, in the present invention, based on position information received from a transmitter attached to a managed person, a position grasping system that displays the position of the managed person together with a map on a display unit And setting a virtual area on the map, and displaying the virtual area on the display unit together with the map, and based on the position information, the manager deviates from the virtual area. And a notifying unit for notifying the deviation of the person to be managed based on the determination result by the determining unit.

In the above-described configuration, it is preferable that a relay unit that relays transmission of signals between the transmitter and the processing device is provided.
In the above configuration, it is preferable that the transmitter has a reception function and is activated and stopped by an external signal.

  According to the present invention, it is possible to grasp the position information of the managed person at a low cost, and it is possible to easily cope with the change of the management area.

The lineblock diagram showing the outline of the position grasping system of a 1st embodiment. The perspective view which shows the transmitter / receiver in the position grasping system of FIG. The block diagram which shows the electric constitution of the transmitter / receiver in the position grasping system of FIG. The side view which shows the repeater in the position grasping system of FIG. The block diagram which shows the electric constitution of a relay apparatus. The block diagram which shows the electric constitution of the processing apparatus of the monitoring center in the position grasping system of FIG. Explanatory drawing which shows the worker information memorize | stored in the monitoring part and the memory | storage part of a relay apparatus. The figure which shows the display screen of the display part in a relay apparatus and a monitoring center. The figure which shows the job flow among a transmitter / receiver, a relay apparatus, and a monitoring center. The flowchart which shows operation | movement of a transmitter / receiver. The flowchart which shows operation | movement of a relay apparatus. The flowchart which shows operation | movement of a monitoring center. The flowchart which shows operation | movement of the monitoring center in the position grasping system of 2nd Embodiment. The flowchart which shows operation | movement of the monitoring center in the position grasping system of 3rd Embodiment.

(First embodiment)
Hereinafter, a first embodiment of a position grasping system embodying the present invention will be described with reference to FIGS.

  In the first embodiment, as shown in FIG. 1, a large number of workers 12 as managers and supervisors 13 as one or a plurality of managers are arranged in an outdoor work place 11. The state of the work place 11 can be monitored in the relay device 14 as a relay means arranged in the work place 11 or in the vicinity of the work place 11 and can be monitored and managed in the monitoring center 15 via the relay device 14. It has become. In the monitoring center 15 and the relay device 14, a virtual area 80 described later is set so as to include the work place 11, and workers in the virtual area 80 can be constantly monitored.

Therefore, the configuration and operation of the position grasping system according to the first embodiment will be described in detail below.
The worker 12 and the supervisor 13 wear a single transmitter / receiver 21 as a transmitter shown in FIGS. The transceiver 21 has a GPS signal reception function, a positioning data creation function as position information, a reception and transmission function of various signals other than GPS signals, an alert notification function, and the like.

The transceiver 21 includes a main body 22 and an attachment 23 for attaching the main body 22 to the clothes.
On the front surface of the main body 22 of the transceiver 21, a name 34 of the owner of the transceiver 21, an identification code 35 indicating the owner, and a face photograph 36 of the owner are displayed. A charging connector 37 is provided at the end of the main body 22.

Next, an electrical configuration housed in the main body 22 of the transceiver 21 in FIG. 3 will be described.
The GPS receiver 44 receives a GPS (Global Positioning System) signal from a satellite. The control unit 41 that controls the operation of the entire transceiver 21 has a position data creation unit 42, which itself is represented by latitude and longitude from the GPS signal received by the GPS reception unit 44. The positioning data F, which is the position information of, is created. The control unit 41 has a storage unit 43, which stores program data and various temporary data shown in FIG. The transmission unit 45 transmits position data D including its own positioning data F and identification code C to the relay device 14 and the other transceiver 21. The receiving unit 46 receives signals from the relay device 14 and other transceivers 21. The power supply 47 is a secondary battery and stores the electric power input from the charging connector 37. The power supply 47 supplies power to the electrical components in the main body 22. The buzzer 48 and the lamp 49 are for informing an alert described later. The control unit 41 includes a timer 50 for counting time, and whenever the timer 50 counts for a certain time, for example, every 10 seconds, a GPS activation signal is output from the control unit 41, and the GPS receiving unit 44. Performs a GPS signal receiving operation. Note that the output interval of the GPS activation signal can be arbitrarily set. The sensor 33 detects the mounting state of the main body 22 with respect to the fixture 23, and the control unit 41 is activated and stopped by a signal from the relay device 14 on the condition of the detection.

  The transceiver 21 constitutes an ad hoc network constituting a multi-hop function, that is, a so-called ZigBee communication network. Here, one of the transceivers 21 owned by the supervisor 13 serves as a coordinator, and the other serves as a router or an end device. Then, data having a structure consisting of a lower layer that controls communication, a middle layer that defines ZigBee Alliance, and an upper layer that a user uses is transferred. Therefore, the transceiver 21 has a transmission / reception function and is connected to other transceivers 21 without intervention of an access point. In particular, in the first embodiment, as is apparent from FIG. 1, a mesh-type communication network in which each transceiver 21 is independently connected to another transceiver 21 is configured.

Next, the configuration of the relay device 14 will be described with reference to FIGS. 4 and 5.
The relay device 14 includes a body portion 51, and a moving caster 52 is attached to the lower portion thereof. Accordingly, the relay device 14 can freely move and change the installation position. The upper surface of the body 51 is an installation surface 53 on which a notebook personal computer (hereinafter simply referred to as a personal computer) 54 constituting a control device is installed. Accordingly, the personal computer 54 includes a control unit 55, a storage unit 56, a display unit 57 formed of a display, and an operation unit 58 formed of a keyboard. The storage unit 56 stores program data and temporary data shown in FIG.

  A solar cell panel 59 is supported on the body 51 so as to cover the installation surface 53. Therefore, the solar cell panel 59 functions as a sunshade and a roof for the personal computer 54. The electric power generated by the solar cell panel 59 is stored in a power source 60 composed of a secondary battery in the body portion 51. The personal computer 54 is operated by the power source 60. The receiving unit 61 directly receives the signal from the transmitter / receiver 21 and receives the signal from the monitoring center 15 via the cellular phone network 17 by packet communication. The transmitter 62 transmits a signal directly to the transceiver 21 and transmits a signal to the monitoring center 15 via the mobile phone network 17 by the packet communication. Therefore, this relay device 14 fulfills the relay device function between the monitoring center 15 and the transceiver 21.

Next, the configuration of the monitoring center 15 will be described with reference to FIG.
A control device 71 as a setting unit and a discrimination unit of the monitoring center 15 includes a control unit 72, a storage unit 73, a display unit 74, and an operation unit 75. The receiving unit 76 receives a signal from the relay device 14 via the mobile phone network 17 by packet communication, and the transmitting unit 77 transmits a signal to the relay device 14 by packet communication. The notification device 78 as a notification unit notifies an alert. The storage unit 73 stores program data and temporary data shown in FIG. The function of the personal computer 54 as the control device of the relay device 14 has basically the same function as that of the control device 71 of the monitoring center 15, but their operation software is partially different.

Next, the operation of the position grasping system according to the first embodiment configured as described above will be described.
Now, in this position grasping system, as shown in FIG. 9, when the GPS receiver 44 of the transceiver 21 owned by the operator 12 and the supervisor 13 receives the GPS signal, the position data creation section of the transceiver 21 is received. 42 creates positioning data F as the position information indicating the latitude and longitude of its own position, and transmits the positioning data F as position data D together with the identification code C of the transceiver 21 itself. The transmitted position data D is received by the relay device 14 via the communication network of the transceiver 21 or directly received by the relay device 14. The relay device 14 processes the received data, and displays the positions of the worker 12 and the supervisor 13 together with the virtual area 80 on the map 82 shown in FIG.

  Further, the relay device 14 transmits the received data to the monitoring center 15. In the monitoring center 15, the received data is processed, and the positions of the worker 12 and the supervisor 13 are displayed together with the virtual area 80 on the map 82 displayed on the display unit 74 as with the relay device 14. When the worker 12 departs from the virtual area 80 corresponding to the work place 11, the monitoring center 15 notifies an alert in the monitoring center 15 and transmits an alert signal to the relay device 14. An alert is also notified in the relay device 14. Further, the alert signal is transmitted from the relay device 14 to the transmitter / receiver 21, and the buzzer 48 and the lamp 49 of the transmitter / receiver 21 of the deviation relevant worker 12 and the supervisor 13 are operated.

Therefore, further details will be described below. In the routine shown in FIG. 10, a program stored in the storage unit 43 of the transceiver 21 proceeds under the control of the control unit 41.
10, when the receiving unit 46 receives an ON signal from the relay device 14 (S1), the control unit 41 is provided on the condition that the mounting state of the main body 22 with respect to the fixture 23 of the transceiver 21 is detected by the sensor 33. The timer 50 is started (S2). Then, every time 10 seconds elapses due to the count of the timer 50 (S3), the GPS receiving unit 44 is operated to receive a GPS signal (S4), and the position data creation unit 42 performs positioning indicating its own position. Data F (shown in FIG. 3) is created (S5). This positioning data F is represented by the latitude and longitude of the own position. In this embodiment, the latitude is X and the longitude is Y. Then, the positioning data F and the position data D including its own identification code C are transmitted to the other transmitter / receiver 21 and the relay device 14.

  Next, it is determined whether or not the sensor 33 is turned off, that is, whether or not the main body 22 of the transceiver 21 has been detached from the fixture 23 (S7), and if it is removed, the information is transmitted to the relay device 14. (S8). That is, when the main body 22 of the transmitter / receiver 21 is removed from the fixture 23 for some reason, and the management of the operator 12 becomes impossible, a signal indicating the management impossible state is directed to the relay device 14. Sent.

  Next, it is determined whether or not the transmission unit 45 has received alert information corresponding to an abnormal situation such as disconnection of the transmitter / receiver 21 or occurrence of a deviant described later (S9). When the alert information is received, the buzzer 48 sounds and the lamp 49 blinks until the alert information reception end is determined, and the alert is notified (S10, S11). Next, it is determined whether or not an off signal from the relay device 14 has been received (S12), the control unit 41 and its timer 50 are stopped with the reception, and the operation of the transceiver 21 is finished. If the off signal is not received, the program returns to S3 and waits for a 10-second count by the timer 50.

  In the relay device 14, a routine shown in FIG. 11 is executed. This routine is executed by a program stored in the storage unit 56 of the personal computer 54 under the control of the control unit 72.

  When a start switch (not shown) of the personal computer 54 is turned on, execution of the program is started (S21), and reception of position data D from the transceiver 21 is awaited (S22). Upon reception, the position data D is stored in the storage unit 56 (S23), and the positioning data F in the position data D is collated with the map data stored in the storage unit 56 to display the screen as a display unit. (S24). The display contents and the processing operation of the position data D in the storage unit 56 are the same as the operation of the monitoring center 15 and will be described in detail together with the operation of the monitoring center 15 described later.

  At the same time, the position data D is transmitted from the transmission unit 62 to the monitoring center 15 via the mobile phone network 17 using packet communication. Next, it is determined whether or not the receiving unit 61 has received alert information indicating an abnormal situation from the monitoring center 15, and the alert information is processed together with the reception (S27), and the processing result is directed to the transceiver 21. (S28). The transceiver 21 receives this information and performs an alert process in the S27 process step.

  Next, it is determined whether or not there is an end operation of the program execution accompanying an operation such as the stop of the personal computer 54 (S29). When the end operation is determined, the program execution is ended (S30). If the ending operation is not performed, the process returns to S22.

  In the monitoring center 15, the routine shown in FIG. 12 is executed. This routine is executed by executing a program stored in the storage unit 73 of the control device 71 under the control of the control unit 72.

  When a start switch (not shown) of the control device 71 of the monitoring center 15 is turned on, execution of the program shown in FIG. 12 is started (S51), and reception of the position data D from the relay device 14 is awaited (S52). . At this time, a virtual area 80 shown in FIG. 8 is set in advance on the map stored in the storage unit 73 corresponding to the work place 11. The virtual area 80 is an area surrounded by the latitudes X1 and X2 and the longitudes Y1 and Y2 by setting two latitudes X1 and X2 and two longitudes Y1 and Y2. The data in the virtual area 80 is transmitted to the relay device 14 upon activation with the control device 71, and the virtual area 80 is also set in the relay device 14.

  As the position data D is received, the data content is stored in the storage unit 73. In this case, as shown in FIG. 13, an address for each worker 12 is set in the predetermined area of the storage unit 73 together with the worker name N (same as the name 34) and the identification code C. An area for storing positioning data F indicating the current position of the worker 12 is allocated to each address. Then, every time the position data D of each worker 12 is received from the relay device 14, the positioning data F is rewritten to the latest one and newly stored (S53). The rewritten old positioning data F is stored as history information together with the operator name and identification code in another area (not shown) of the storage unit 73. Next, the latest positioning data F is collated with the map data stored in the storage unit 73, and the operator 12 and the supervisor 13 having the transceiver 21 are displayed together with the map on the screen 79 as shown in FIG. (S54). In this case, the worker 12 and the supervisor 13 are displayed using marks such as circles of different colors. The processing steps S23 and S24 of the relay device 14 shown in FIG. 11 are the same as the operations of the processing steps S53 and S54.

  Next, it is determined whether or not the worker 12 has deviated from the virtual area 80 (S55). This determination is performed by calculating whether the latest positioning data F of each worker 12 is located inside the latitude X1, X2 line and the longitude Y1, Y2 line that divides the virtual area 80. As the worker 12 departs from the virtual area 80, the mark of the worker 12 that has deviated is switched to a conspicuous color (for example, blinking red), and at the same time an alert is issued from the notification device 78 of the monitoring center 15. Alert information is transmitted to the relay device 14 (S56). Therefore, the built-in speaker (not shown) of the personal computer 54 of the relay device 14 notifies the alert, and the supervisor 13 and the buzzer 48 and the lamp 49 of the transmitter / receiver 21 of the departure worker 12 perform the alert notification. Next, the supervisor 13 that is positioned closest to the deviating worker 12, that is, the supervisor 13 having the positioning data F closest to the deviating worker 12 is searched (S57), and the display is switched to blinking or the like. Further, the name N of the deviant is displayed at the top of the screen 79 (S58). Then, an e-mail notifying the existence of the departure person is transmitted to the cell phone of the supervisor 13 that has been found.

  If it is determined in S55 that there is no departure person, after the e-mail is transmitted to the supervisor 13 in S59, whether or not there is a problem in the system, for example, the main body 22 is attached in any of the transceivers 21. It is determined whether or not the tool 23 has been removed (S60). This failure determination includes other failures, for example, when the function of the relay device 14 is stopped and the signal from the relay device 14 is interrupted. If a defect exists, an alert is notified in the monitoring center 15 and alert information is transmitted to the relay device 14 (S61). Therefore, the relay apparatus 14 transmits an alert signal to the supervisor 13, and the transceiver 21 of the supervisor 13 notifies the alert. Thereafter, the end operation of the program execution is determined (S62), and when the end operation is determined, the program execution is ended (S63). If the ending operation is not performed, the process returns to S22.

Therefore, according to this embodiment, the following effects can be obtained.
(1) In order to acquire the positioning data F of the worker 12, a communication network in which the transmitter / receiver 21 is in communication with each other and an add-hop function of the network are used. For this reason, it is not necessary to use a PHS telephone network or a mobile phone network for acquiring the positioning data F, and it is not necessary to install an antenna. Therefore, the cost for acquiring the positioning data F can be prevented, Enables low-cost system operation.

  (2) As described above, the position data D is transferred using the communication network in which the transceivers 21 communicate with each other and the ad-hop function of the network. Therefore, it is not necessary to cause the signals of the respective transceivers 21 to reach far away. For this reason, it is only necessary to operate the respective transceivers 21 with low power, power consumption can be suppressed, and the transceiver 21 can be operated for a long time. It becomes possible.

  (3) Since the positioning data F of the worker 12 and the supervisor 13 is acquired from the GPS data, the positions of the worker 12 and the supervisor 13 are accurately and in real time regardless of the radio wave condition (for example, the ionosphere situation). This makes it possible to manage the worker 12 effectively. Accordingly, the number of supervisors 13 can be reduced, and therefore, low cost can be achieved as described above.

  (4) When the main body 22 is removed from the fixture 23 during use of the transmitter / receiver 21, the transmitter / receiver 21 is configured to generate an alert to the supervisor 13 or the like. Therefore, if the fixture 23 is fixed to the clothes of the operator 12, the removal of the main body 22 can be recognized immediately, and the occurrence of an unmanageable state can be prevented.

  (5) The transmitter / receiver 21 receives a GPS signal every set time (every 10 seconds) and transmits positioning data F. For this reason, waste of power supply power is prevented and the transceiver 21 can be operated for a long time.

  (6) The transmitter / receiver 21 is started and stopped from the outside. For this reason, it is possible to prevent the operator 12 from starting up the transmitter / receiver 21 when it is unnecessary due to some mistake or the like, and it is possible to avoid wasteful power consumption. Conversely, when the transmitter / receiver 21 is necessary, for example, the operator 12 can be prevented from stopping the transmitter / receiver 21, and can be prevented from becoming unmanageable.

  (7) Since the relay device 14 is interposed between the work place 11 and the monitoring center 15, the work place 11 can be monitored in the monitoring center 15 even if the work place 11 and the monitoring center 15 are separated from each other. Therefore, the monitoring center 15 can monitor a plurality of workplaces 11.

(8) Since the relay device 14 is movable, the relay device 14 can be easily rearranged. For this reason, it can respond smoothly to the change and movement of the work place 11.
(9) Since the power supply of the relay device 14 is obtained from the solar battery, the troublesomeness of connecting a power supply line to the relay device 14 can be avoided. Moreover, even if the workplace 11 is a place such as a mountainous area where no power supply facilities exist, the position grasping system can be operated without any trouble.

  (10) Since the monitoring center 15 can set the virtual area 80 including the work place 11 and display the worker 12 and the supervisor 13 in relation to the virtual area 80, the location of the worker 12 and the supervisor 13 can be determined. It can be identified at a glance and can be easily managed.

  (11) When a deviant occurs, the name N is displayed on the screen 79 and an alert can be generated to the supervisor 13, so that an unexpected situation such as the missing of the worker 12 can be avoided in advance. it can.

(Second Embodiment)
Next, a description will be given of a second embodiment of the position grasping system embodying the present invention, focusing on parts different from the first embodiment.

  In the second embodiment, in the execution of the program of the monitoring center 15, the processing steps S101 to S104 shown in FIG. 13 are added after the negative determination in S55. That is, in FIG. 13, when there is no departure person (S55), the moving speed of each worker 12 is determined (S101). The determination of the moving speed is performed based on the changing speed of the numerical values of the latest and historical positioning data F of the operator 12. If the movement speed of the worker 12 is higher than the normal walking speed, it is determined whether or not the movement speed continues for a certain time (S102). If the movement speed continues, the worker 12 moves to the virtual area. Even if it is located within 80, an alert is issued as an abnormal situation of the operator 12 (S56). Examples of the abnormal situation include a case where the worker 12 who is going to report is running due to an accident or a sick person, or a case where the worker 12 slides down a slope. Then, in the processing steps S57 to S59, the same processing as when a departure person occurs is executed.

  If it is determined in S101 that the moving speed is equal to or less than the normal walking speed, whether each worker 12 is in an approaching state where the distance from the other worker 12 is a certain distance (for example, 2 m) or less. Determination is made (S103). This determination is made based on whether or not the numerical value of the positioning data F of the worker 12 is approaching. If it is in the approaching state, the accumulated time in the approaching state is counted from the latest and history information (S104). And when the accumulation time is more than the predetermined time, there is a possibility of an inconvenience such as a case where another worker is accompanied by a suddenly ill person or an accident involving a plurality of people. Is issued (S56), and then, in processing steps S56 to S59, the same processing as in the case of a deviant is performed on the corresponding workers 12.

Accordingly, also in the second embodiment, the following effects can be obtained in addition to the effects described in the first embodiment, and in particular, the following effects can be obtained in this embodiment.
(12) Since an abnormal situation can be immediately grasped about the behavior and situation of the worker 12, a prompt response is possible.

(Third embodiment)
Next, a description will be given of a third embodiment of the position grasping system embodying the present invention, focusing on parts different from the first embodiment.

In the third embodiment, the position data D transmitted from the transceiver 21 is in the form of a packet signal transmitted by the mobile phone network.
In the operation of the monitoring center 15, as shown in FIG. 14, the treatment steps S201 and S202 are added after the negative determination in S52 of FIG. When the position data D from the worker 12 is not received (S52), the non-reception time is counted (S201). If the count time is equal to or longer than the predetermined time, it is assumed that the worker 12 is out of the virtual area 80, that is, outside the work area 11 and out of the monitoring range. (S202). In this process step S202, it waits for the reception of the packet signal of the position data D from the base station of the cellular phone network. And when it receives, the process after process step S56-S59 of FIG. 13 is performed.

Therefore, in the third embodiment, the following effects can be obtained in addition to the effects described in the first embodiment.
(13) Even if the worker 12 moves away from the virtual area 80 to an unmonitorable distance, the monitoring can be continued by switching the monitoring to the mobile phone network. Therefore, even if the worker 12 is located at a long distance from monitoring in the virtual area 80, the worker 12 can be grasped.

(Example of change)
In addition, this embodiment can also be changed and embodied as follows.
-The relay device 14 must have all the functions of the monitoring center 15. When configured in this way, the relay device 14 functions as the monitoring center 15, so that the mobility of the position determination system is improved.

・ Install the relay device 14 in the building or other facilities. In this case, the relay device 14 is not movable and is arranged in a fixed state.
-The relay device 14 should be omitted. In this case, the monitoring center 15 directly performs transmission / reception with the transceiver 21. If comprised in this way, it is suitable for management of the worker 12 in a building or a facility. In this case, if an antenna for receiving the position data D is provided in the building or facility, management of a wide range of workers 12 can be performed without the relay device 14.

-Use a plurality of relay devices 14 so that a wide range of workplaces 11 can be managed.
A solar cell panel is provided on the main body 22 of the transceiver 21, and the driving power of the transceiver 21 is obtained from sunlight.

  ・ Bring the transmitter / receiver 21 to a child so that the child's location can be ascertained when going to and from school. Therefore, in this case, the child is a manager and the manager is, for example, a school official.

(Another technical idea)
The technical ideas other than the claims grasped by the above embodiment will be described below together with their effects.

(A) The position determination system according to claim 3, wherein the notification unit transmits a signal to a transmitter / receiver owned by an administrator and causes a notification unit provided in the transmitter / receiver to perform a notification operation.
If comprised in this way, it will become possible for an administrator to cope with an abnormal condition effectively.

(B) The position grasping system according to claim 3 or the technical idea (A), wherein the transceiver has a relay device capability of relaying transmission of position information.
According to this configuration, a communication network that does not require an access point or the like can be constructed, and simple and low-cost operation is possible.

  (C) The transmitter / receiver includes a detecting unit that detects that the transmitter / receiver has been removed from the managed person, and the transmitting unit of the transmitter / receiver transmits a detection result of the detecting unit. The position grasping system according to any one of items A) and (B).

According to this configuration, it is possible to immediately detect the disconnection or dropout of the transmitter / receiver, thereby preventing an unexpected situation.
Tag structure

  DESCRIPTION OF SYMBOLS 11 ... Work place, 12 ... Worker as managed person, 13 ... Supervisor, 14 ... Relay device, 15 ... Monitoring center, 21 ... Transceiver, 57 ... Display part, 74 ... Display part, 80 ... Virtual area, 82 …map.

Claims (3)

Based on the position information received from the transmitter attached to the managed person, in the position grasping system that displays the position of the managed person together with the map on the display unit,
A setting unit that sets a virtual area on the map and displays the virtual area on the display unit together with the map;
Based on the position information, a determination unit that determines that the managed person has deviated outside the virtual area;
A position grasping system comprising: a notifying unit for notifying a deviation of a managed person based on a determination result by the determining unit. The position grasping system according to claim 1, wherein relay means for relaying transmission of signals between the transmitter and the processing device is provided. The position grasping system according to claim 1 or 2, wherein the transmitter has a reception function and is activated and stopped by an external signal.

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