WO2022244415A1

WO2022244415A1 - Positioning system

Info

Publication number: WO2022244415A1
Application number: PCT/JP2022/011256
Authority: WO
Inventors: 俊平西中; 俊之信岡; 佑樹渡辺; 俊植木
Original assignee: シャープ株式会社
Priority date: 2021-05-20
Filing date: 2022-03-14
Publication date: 2022-11-24

Abstract

Provided is a positioning system (1) equipped with: a plurality of first terminals (100) that are arranged at prescribed positions and emit a unique identification number; a second terminal (200) that is portable and that emits a unique identification number; a third terminal (300) capable of receiving the identification information emitted from the first and second terminals; a first computation unit (510) (310) for computing position information about the third terminal on the basis of the identification information received from the first terminals by the third terminal; and a second computation unit (510) (310) for computing position information about the second terminal on the basis of the position information about the third terminal as computed by the first computation unit and the intensity of radio waves from the second terminal received by the third terminal.

Description

Positioning system

The present disclosure relates to positioning system technology using multiple transmitters.

Conventionally, positioning systems that use multiple transmitters have been known. For example, International Publication No. 2017/199907 pamphlet (Patent Document 1) discloses a monitored object management system and a beacon terminal recognition method. According to Patent Document 1, there is provided a monitored object management system that does not require a receiver to be installed in advance and can manage the existence of a plurality of moving monitored objects by simple means. A monitored object management system is composed of a plurality of beacon terminals, one or more management terminals, and a management server. A plurality of beacon terminals are present in one or more areas and held by a plurality of moving monitored objects, each having a unique beacon identifier and transmitting a beacon signal. One or more management terminals are held by one or more mobile bodies moving in one or more areas, receive beacon signals to acquire beacon identifiers and beacon existence information, and acquire location information by a positioning system. to output beacon information spontaneously or upon request. The management server establishes the existence status of a plurality of monitored objects in one or more areas based on beacon information obtained from one or more management terminals.

International Publication No. 2017/199907 pamphlet

The purpose of this disclosure is to improve the accuracy of the position information of the positioning target.

According to one aspect of the present disclosure, a plurality of first terminals that are placed at predetermined locations and emit unique identification numbers, a second mobile terminal that emits unique identification numbers, a first and a third terminal capable of receiving identification information transmitted from the second terminal; a first calculation unit for calculating position information of the third terminal based on the identification information received by the third terminal from the first terminal; a second calculation unit that calculates position information of the second terminal based on the position information of the third terminal calculated by the calculation unit and the strength of the radio wave received by the third terminal from the second terminal; A system is provided.

As described above, according to the present disclosure, it is possible to improve the accuracy of the position information of the positioning target.

1 is a front view showing the entire positioning system 1 according to a first embodiment; FIG. 2 is a block diagram showing the configuration of the first terminal according to the first embodiment; FIG. 3 is a block diagram showing the configuration of a second terminal according to the first embodiment; FIG. 1 is a block diagram showing the configuration of a communication terminal according to a first embodiment; FIG. 2 is a block diagram showing the configuration of a server according to the first embodiment; FIG. 4 is a flow chart showing information processing of the communication terminal and the server according to the first embodiment; 4 is an image diagram showing history data according to the first embodiment; FIG. 4 is a flow chart showing a specific example of information processing of the communication terminal and server according to the first embodiment; FIG. 2 is an image diagram showing a positioning method according to the first embodiment; FIG. FIG. 4 is an image diagram showing changes in radio wave intensity according to the first embodiment; 4 is a flow chart showing a specific example of information processing of the communication terminal and server according to the first embodiment; 4 is a flow chart showing a specific example of information processing of the communication terminal and server according to the first embodiment; 4 is a flow chart showing a specific example of information processing of the communication terminal and server according to the first embodiment; 4 is a table showing use cases of the positioning system according to the first embodiment; 9 is a flow chart showing an example of information processing of a communication terminal and a server according to the second embodiment; FIG. 11 is a flow chart showing an example of information processing of a communication terminal and a server according to a third embodiment; FIG. FIG. 11 is an image diagram showing an example of a screen of a terminal according to the third embodiment; FIG. FIG. 11 is an image diagram showing an example of a screen of a terminal according to the third embodiment; FIG. It is a table showing a setting example according to the third embodiment. FIG. 14 is a flow chart showing an example of information processing of a communication terminal and a server according to the fourth embodiment; FIG. FIG. 12 is an image diagram showing appropriate data according to the fourth embodiment; FIG. FIG. 14 is a flow chart showing an example of information processing of a communication terminal and a server according to the fourth embodiment; FIG.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the following description, the same parts are given the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.
[First embodiment]
<Overall Configuration of Positioning System 1>

First, the overall configuration of the positioning system 1 according to this embodiment will be described. Referring to FIG. 1, a positioning system 1 according to the present embodiment includes a plurality of

first terminals

100, 100, . It is composed of

second terminals

200, 200, .

Each of the first terminals 100 periodically transmits a beacon of its own identification information. Each of the second terminals 200 also periodically transmits its own identification information as a beacon. Each communication terminal 300 is realized by a smart phone, a tablet, a wearable terminal, or the like, and uploads to the server 500 identification information, radio wave intensity, and the like received from the

first terminals

100 , 100 . . . and the second terminal 200 .

The server 500 acquires the identification information and the radio wave intensity of the

first terminals

100, 100, . Identify. Then, the server 500 acquires the identification information of the second terminal 200 and the radio wave intensity from the communication terminal 300, and based on the position of the communication terminal 300, determines the position of the second terminal 200 and the position of the second terminal 200. Identifies the position of the device 20, acquires the movement route, identifies events and situations related to the second terminal 200 and the device 20, and provides such information to the communication terminal 300 and other administrator terminals 300B. or

In this manner, the positioning system according to the present embodiment can accurately calculate and determine the position, movement route, and event of second terminal 200 . The configuration for realizing such functions will be described in detail below.
<Configuration of first terminal 100>

The configuration of first terminal 100 will be described with reference to FIG. First terminal 100 mainly includes CPU 110, memory 120, operation unit 140, communication interface 160, and the like. The operation unit 140 accepts settings such as a power ON/OFF command and a beacon transmission cycle. The memory 120 stores an identification number set uniquely to the first terminal 100, a beacon transmission cycle, and the like. CPU 110 beacons the identification information via communication interface 160 . Note that the first terminal 100 may transmit radio waves with a higher output than the second terminal 200 using, for example, BLE (Bluetooth Low Energy (registered trademark) communication, WiFi (registered trademark) communication, or the like. It is also possible to use a radio wave with a similar output, and it is preferable that the reach of the radio wave from the beacon is several meters to several tens of meters.
<Configuration of Second Terminal 200>

The configuration of second terminal 200 will be described with reference to FIG. Second terminal 200 mainly includes CPU 210, memory 220, operation unit 240, communication interface 260, and the like. The operation unit 240 accepts settings such as a power ON/OFF command and a beacon transmission cycle. The memory 220 stores an identification number uniquely set to the second terminal 200, a beacon transmission cycle, and the like. CPU 210 transmits a beacon of identification information and the like via communication interface 260 . Note that the second terminal 200 may use, for example, BLE (Bluetooth Low Energy (registered trademark) communication or the like to transmit a radio wave with a lower output than the first terminal 100, or a radio wave with a similar output. Radio waves may be used, and it is preferable that the radio waves of the beacon reach a range of several tens of centimeters to several meters.
<Configuration of communication terminal 300>

The configuration of the communication terminal 300 will be described with reference to FIG. Communication terminal 300 mainly includes CPU 310, memory 320, display 330, operation unit 340, communication interface 360, speaker 370, microphone 380, timer 390, and the like. Display 330 and operation unit 340 may be realized by touch panel 350 . The memory 320 stores control programs, identification information and user identification information of the communication terminal 300, identification information and radio wave intensity of the first terminal 100, identification information and radio wave intensity of the second terminal 200, and the like. The timer 390 measures the current date and time, the elapsed time from a predetermined timing, and the like.

CPU 310 stores the identification information and radio wave intensity of first terminal 100 received via communication interface 360 and the identification information and radio wave intensity of second terminal 200 received via communication interface 360 together with the current date and time in memory 320. , or transmitted to the server 500 via the communication interface 360. FIG.
<Configuration of Server 500>

The configuration of the server 500 will be described with reference to FIG. Server 500 mainly includes CPU 510, memory 520, operation unit 540, communication interface 560, timer 590, and the like. The timer 590 measures the current date and time, elapsed time from a predetermined timing, and the like.

Memory 520 stores control programs, location information data 521 for each first terminal 100, current location history data 522 for each second terminal 200, current location history data 523 for each communication terminal 300, communication terminal 300 Acquired data 524 such as identification information and radio wave intensity of the

first terminals

100, 100 ..., identification information, radio wave intensity and measurement data of the second terminal 200 uploaded from the second terminal 200, identification information of the second terminal 200 and the second Correspondence data 525 with identification information such as equipment 20 to which the terminal 200 is attached, clothes, patients, etc., and history data 526 of events identified with respect to the second terminal 200 and the equipment 20 to which the second terminal 200 is attached. memorize

The CPU 510 calculates the current position of the communication terminal 300 based on the identification information of the plurality of

first terminals

100, 100 . are accumulated in the memory 520 as follows. CPU 510 identifies the current position of second terminal 200 based on the identification information of second terminal 200 and the radio wave intensity received from communication terminal 300 and the current position of communication terminal 300 . Then, the current location of the second terminal 200 or the device 20 to which the second terminal 200 is attached is associated with the current date and time and accumulated in the memory 520 as history data 522, or based on changes in location or timing. , an event related to the second terminal 200 or the device 20 to which the second terminal 200 is attached is specified and stored in association with the current date and time.
<Information processing>

Information processing in communication terminal 300 and server 500 according to the present embodiment will be described below. CPU 310 of communication terminal 300 executes the following processes according to the program in memory 320 , and CPU 510 of server 500 executes the following processes according to the program in memory 520 .

Referring to FIG. 6, CPU 310 of communication terminal 300 determines whether or not a beacon has been received from first terminal 100 via communication interface 360 (step S102).

When the beacon from the first terminal 100 is received (YES in step S102), the CPU 310 associates the identification information and the radio wave intensity included in the beacon with the current date and time via the communication interface 360, and sends the signal to the server. 500 (step S104).

In response to this, CPU 510 of server 500 acquires the identification information and radio wave intensity of a plurality of

first terminals

100, 100 . Then, the current position of the communication terminal 300 is calculated based on the position information data 521, and is stored in the history data 523 in association with the current date and time (step S106). As a method for determining the position of communication terminal 300 based on the identification information of

first terminals

100, 100, .

Also, the CPU 310 of the communication terminal 300 determines whether or not a beacon has been received from the second terminal 200 via the communication interface 360 (step S112).

When the beacon from the second terminal 200 is received (YES in step S112), the CPU 310 associates the identification information and the radio wave intensity included in the beacon with the current date and time via the communication interface 360, and sends the signal to the server. 500 (step S114).

Upon receipt of this, CPU 510 of server 500 acquires the identification information and radio wave intensity of second terminal 200 from communication terminal 300 via communication interface 560, accumulates them in acquired data 524, and communication terminal 300 receives them. The current position of the second terminal 200 and the device 20 to which the second terminal 200 is attached is calculated based on the transition of the radio wave intensity of the second terminal 200 and the current position of the communication terminal 300 in the history data 523, and the current date and time is calculated. is stored in the history data 522 (step S116). Note that, for example, when communication terminal 300 receives the identification information of a second terminal having a radio wave intensity equal to or higher than a predetermined value, CPU 510 determines the position of communication terminal 300 as the position of second terminal 200, or determines the position of second terminal 200. When the communication terminal 300 receives the identification information of the second terminal whose radio field intensity is equal to or greater than a predetermined value, the position between the two can be determined as the position of the second terminal 200 .

CPU 510 determines whether or not a predetermined condition is satisfied based on changes in the radio wave intensity of second terminal 200 received by communication terminal 300, the history of the current position of second terminal 200, and the like (step S120). Thereby, the CPU 510 identifies the event (step S140). The CPU 510 associates the event with the current date and time and accumulates it in the history data 526 (step S150). As the history data 526, as shown in FIG. 7, for each device 20 to which the second terminal 200 is attached, information for specifying the device 20, the person in charge of the work, the start date and time of the event, and so on. , the end date and time of the event, and the contents of the event.
<Example of information processing>

Regarding step S120, the CPU 510 executes the following processing, for example. 8 to 10, CPU 510 of server 500 determines whether the intensity of radio wave from second terminal 200 received by communication terminal 300 exceeds a predetermined threshold ((1) in FIGS. 9 and 10, etc.). It is determined whether or not (step S132). If the predetermined threshold is not exceeded (NO in step S132), CPU 510 repeats the process from step S102.

If the radio wave intensity exceeds the predetermined threshold (YES in step S132), CPU 510 determines that communication terminal 300 has moved more than a predetermined distance while the radio wave intensity has exceeded the predetermined threshold (see FIGS. 9 and 9). (2) in FIG. 10, etc.) is determined (step S134). If it has not moved more than the predetermined distance (NO in step S134), CPU 510 repeats the process from step S102.

If it has moved by a predetermined distance or more (YES in step S134), CPU 510 determines whether or not the radio wave intensity has fallen below a predetermined threshold value ((3) in FIGS. 9 and 10, etc.) (step S136). If the predetermined threshold is exceeded (NO in step S136), CPU 510 repeats the process from step S102.

When the radio wave intensity is below the predetermined threshold (YES in step S136), CPU 510 determines whether communication terminal 300 has moved a predetermined distance or more while the radio wave intensity exceeds the predetermined threshold. (step S138). If it has not moved more than the predetermined distance (NO in step S138), CPU 510 repeats the process from step S102.

If communication terminal 300 has moved by a predetermined distance or longer while the radio field intensity exceeds the predetermined threshold (YES in step S138), CPU 510 generates an event that second terminal 200 and second terminal 200 are attached. It is determined that the device 20 has moved (step S141), and the information is accumulated in the history data 526 (step S150).
<Another example of information processing>

Regarding step S120, for example, the following processing may be executed. Referring to FIG. 11, CPU 510 of server 500 determines that while communication terminal 300 has moved by a predetermined distance or more (YES in step S134), the radio wave intensity continues to exceed a predetermined threshold. (NO in step S136), CPU 510 determines, as an event, that second terminal 200 and device 20 to which second terminal 200 is attached are in use (step S142), and outputs the information. It accumulates in the history data 526 and rewrites data in use (step S150).

Note that when communication terminal 300 moves by a predetermined distance or more while the radio field intensity exceeds a predetermined threshold (YES in step S138), CPU 510 outputs second terminal 200 and second terminal 200 as an event. is determined to have moved (step S141), the information is accumulated in the history data 526, and data in use is rewritten (step S150).
<Another example of information processing>

Alternatively, referring to FIG. 12, CPU 510 of server 500 determines whether the intensity of radio wave from second terminal 200 received by communication terminal 300 exceeds a predetermined threshold ((1) in FIGS. 9 and 10, etc.). (step S132). If the predetermined threshold is not exceeded (NO in step S132), CPU 510 repeats the process from step S102.

If the radio wave intensity exceeds the predetermined threshold (YES in step S132), CPU 510 controls the radio wave intensity to exceed the predetermined threshold within a first predetermined time period, such as one minute. It is determined whether communication terminal 300 has moved a predetermined distance or more ((2) in FIGS. 9 and 10, etc.) (step S134).

If the vehicle has not moved by a predetermined distance or more within the first predetermined time (NO in step S134), CPU 510 sets a second predetermined time shorter than the first predetermined time, such as 3 seconds. It is determined whether or not the radio field intensity has fallen below a predetermined threshold within a shorter period of time (step S143). If the predetermined threshold is exceeded (NO in step S136), CPU 510 repeats the process from step S102.

If the radio field intensity falls below the predetermined threshold for a period shorter than the second predetermined time (YES in step S143), CPU 510 detects that communication terminal 300 passes second terminal 200 as an event. Alternatively, it may be determined that the location of the second terminal 200 has been confirmed (step S144), and the information may be accumulated in the history data 526 (step S150). If the radio wave intensity does not fall below the predetermined threshold (NO in step S143), CPU 510 repeats the process from step S134.
<Another example of information processing>

Alternatively, referring to FIG. 13, CPU 510 of server 500 determines whether the intensity of radio wave from second terminal 200 received by communication terminal 300 exceeds a predetermined threshold ((1) in FIGS. 9 and 10, etc.). (step S132). If the predetermined threshold is not exceeded (NO in step S132), CPU 510 repeats the process from step S102.

If the vehicle has moved a predetermined distance or more within the first predetermined time (YES in step S134), the CPU 510 determines that the radio wave intensity has fallen below a predetermined threshold value ((3) in FIGS. 9 and 10, etc.). It is determined whether or not (step S136). If the predetermined threshold is exceeded (NO in step S136), CPU 510 determines whether or not communication terminal 300 is inside the facility (step S145).

If the user is in the facility (YES in step S145), CPU 510 determines that second terminal 200 or device 20 to which second terminal 200 is attached is being used as an event (step S142). , the information may be stored in history data 526 (step S150).

If not inside the facility (NO in step S145), the CPU 510 determines that the second terminal 200 and the device 20 to which the second terminal 200 is attached have been brought out of the facility as an event ( Step S146), the information may be stored in history data 526 (step S150).
<Use case>

The positioning system 1 as described above can be used in various facilities and industries. For example, as shown in FIG. 14, the first terminal 100 may be a smartphone or tablet held by an employee working in an office, the device 20 may be a shared PC in the company or office, and the second terminal 200 may be a device attached thereto. Alternatively, the first terminal 100 may be a smartphone or tablet held by a nurse working in a hospital, and the second terminal 200 may be a communication device attached to the patient's clothing. Alternatively, the first terminal 100 is a communication terminal attached to a forklift or a wagon cart used in a factory, warehouse, or store, and the product or luggage is the device 20, and the communication terminal attached to them, or the smartphone of a worker or salesclerk. may be used as the second terminal 200 .
[Second embodiment]

In addition to the above embodiments, the position of communication terminal 300 and the position of second terminal 200 may be identified based on appropriate data among data from communication terminal 300 .

For example, as shown in FIG. 15, memory 520 of server 500 stores appropriate correspondence data 527 between communication terminal 300 and second terminal 200 . As a result, when CPU 510 of server 500 acquires the identification information and radio wave intensity of second terminal 200 from communication terminal 300 via communication interface 560 (step S116), it refers to correspondence data 525 to obtain the current If it is the identification information of the second terminal 200 linked to the communication terminal 300 (step S147), the process from step S132 onward is executed based on the identification information of the second terminal 200 and the radio wave intensity. That is, the CPU 510 does not execute the process from step S132 on the identification information and the radio wave intensity of the second terminal 200 that are not associated with the current communication terminal 300 .
[Third Embodiment]

Further, in addition to the above embodiment, as shown in FIG. 16, the CPU 510 of the server 500 can also control the second terminal 200 and the devices attached to the second terminal 200 based on the history data 526 shown in FIG. 20 and information such as the positions of the second terminal 200 and the device 20 are transmitted to the communication terminal 300 via the communication interface 560 (step S152). Accordingly, CPU 310 of communication terminal 300 can display an event occurring in second terminal 200 or device 20 on display 330 or output audio from speaker 370 based on data from server 500 .

For example, as shown in FIG. 17, CPU 510 of server 500 identifies the movement route of communication terminal 300 and the movement route of second terminal 200 and device 20 based on history data 526 and the like, and determines the movement route. It is also conceivable to transmit the indicated data to the communication terminal 300 or another administrator terminal 300B via the communication interface 560. FIG.

It should be noted that the other administrator terminal 300B is a smartphone, a personal computer, or the like used by the administrator of the facility or the person in charge of holding the communication terminal 300. Since other administrator terminal 300B has the same configuration as communication terminal 300, the configuration thereof will not be repeated here.

More specifically, in the present embodiment, the memory 520 of the server 500 stores map data of the facility. Based on the history data 526 and the like, the CPU 510 identifies the movement route of the communication terminal 300, the movement route of the second terminal 200 and the device 20, and information related to the event, and transmits the movement route and event details to the facilities. Data drawn on an image is created and provided to the communication terminal 300 and other administrator terminals 300B. Thereby, the CPU 310 of the communication terminal 300 and other administrator terminals 300</b>B can display the moving route of the communication terminal 300 and the moving routes of the second terminal 200 and the device 20 on the display 330 . As a result, the user of the communication terminal 300 can remember the position of the device 20 to which the second terminal 200 is attached, and the person in charge of the other administrator terminal 300B can recognize the usage of the device 20. .

Alternatively, as shown in FIG. 18 , CPU 510 of server 500 transmits data indicating the movement route of communication terminal 300 and information about events through communication interface 560 based on history data 526 and the like. may be transmitted to the administrator terminal 300B or the like, and the CPU 310 of the communication terminal 300 or another administrator terminal 300B may display the moving route of the second terminal 200 or the device 20 and the event content on the display 330. FIG.

In addition, in the present embodiment, it is preferable that the user of communication terminal 300 or the like can set not to display his/her own position or moving route. For example, as shown in FIG. 19, a first mode in which the position and movement route of communication terminal 300 are displayed, a second mode in which the position and movement route of communication terminal 300 are recorded but not displayed, It is preferable to be able to select a third mode in which not only the position and moving route of the terminal 300 but also the received identification information of the second terminal 200, the strength of the radio wave, and the content of the event are not recorded. 17 and 18 are displayed on the communication terminal 300 or other administrator terminal 300B in the first mode, and the screen of FIG. 18 is displayed on the communication terminal 300 or other administrator terminal 300B in the second mode. is displayed, the screen of FIG. 17 is not displayed, and neither the screen of FIG. 17 nor the screen of FIG. 18 is displayed on the communication terminal 300 or other administrator terminal 300B in the third mode.
[Fourth embodiment]

Further, in addition to the above embodiment, based on the position of the second terminal 200, it may be determined whether or not the state is suitable for the current situation, and an alert may be issued when there is an abnormality.

For example, as shown in FIG. 20, the memory 520 of the server 500 stores appropriate data 528 such as appropriate places and events according to the time for each second terminal 200 .

As a result, when an event related to second terminal 200 is stored in history data 526 (step S150), CPU 510 of server 500 collates the position of second terminal 200 with a position suitable for the current time ( step S162). CPU 510 determines whether or not they match (step S164). If the two do not match (NO in step S164), CPU 510 transmits an alarm to communication terminal 300 or other administrator terminal 300B via communication interface 560 (step S166). In response to this, the communication terminal 300 and other administrator terminals 300B display or output an alarm (step S168).

Alternatively, as shown in FIG. 21, the memory 520 of the server 500 stores appropriate data 529 storing identification information settings of appropriate persons in charge to be present for each of the second terminals 200 . Appropriate data 529 also stores the correspondence relationship between the identification information of communication terminal 300 and the identification information of the person in charge.

As a result, as shown in FIG. 22, CPU 510 of server 500 stores the identification information of second terminal 200 and the The identification information of the corresponding person in charge is collated (step S172). CPU 510 determines whether or not they match (step S174). If the two do not match (NO in step S174), CPU 510 transmits an alarm to communication terminal 300 or other administrator terminal 300B via communication interface 560 (step S176). In response to this, the communication terminal 300 and other administrator terminals 300B display or output an alarm (step S178).

Further, in the present embodiment, in step S150, CPU 510 associates the event related to second terminal 200 with the date and time of occurrence of the event and the person in charge of communication terminal 300 that has transmitted the data of second terminal 200. It is preferable to store the information for identification in the history data 526 as well.
[Fifth Embodiment]

Other devices may perform part or all of the role of each device in the positioning system 1 of the above embodiment. For example, even if another device takes part or all of the role of each of server 500 and communication terminal 300, or part or all of each role of each of those devices is shared by a plurality of devices. good.

More specifically, the server 500 may be realized by one device, or may be realized by multiple devices on the cloud. Alternatively, part of the processing of the server 500, for example, the CPU 310 of the communication terminal 300 executes the calculation of the current position of the communication terminal 300 to calculate the current position of the second terminal 200, create an image of the movement route, and specify the event. etc. may be executed by the CPU 510 of the server 500 . Alternatively, the CPU 310 of the communication terminal 300 may execute the current position of the communication terminal 300 and the current position of the second terminal 200, and the CPU 510 of the server 500 may execute image creation of the moving route and identification of the event. Alternatively, CPU 310 of communication terminal 300 may execute all of these processes, upload the results to server 500, or provide information to other administrator terminals 300B.

The embodiments disclosed this time should be considered illustrative in all respects and not restrictive. The scope of the present disclosure is indicated by the scope of claims rather than the above description, and is intended to include all modifications within the scope and meaning of equivalents of the scope of claims.

1: positioning system 20: device 100: first terminal 110: CPU
120: Memory 140: Operation unit 160: Communication interface 200: Second terminal 210: CPU
220: Memory 240: Operation unit 260: Communication interface 300: Communication terminal 300B: Administrator terminal 310: CPU
320: Memory 330: Display 340: Operation unit 350: Touch panel 360: Communication interface 370: Speaker 380: Microphone 390: Timer 500: Server 510: CPU
520 : Memory 521 : Location information data 522 : History data 523 : History data 524 : Obtained data 525 : Correspondence data 526 : History data 527 : Correspondence data 528 : Appropriate data 529 : Appropriate data 540 : Operation unit 560 : Communication interface 590: timer

Claims

a plurality of first terminals arranged at predetermined positions and transmitting unique identification numbers;
a second terminal that is portable and transmits a unique identification number;
a third terminal capable of receiving the identification information transmitted from the first and second terminals;
a first calculation unit for calculating location information of the third terminal based on the identification information received by the third terminal from the first terminal;
a second terminal for calculating position information of the second terminal based on the position information of the third terminal calculated by the first calculation unit and the strength of the radio wave from the second terminal received by the third terminal; A positioning system, comprising: a computing unit.
During the first predetermined period in which the strength of the radio wave received by the third terminal from the second terminal is equal to or greater than a first threshold, the second calculation unit The positioning system according to claim 1, wherein position information of two terminals is calculated one or more times.
The positioning system according to claim 1 or 2, wherein the second calculation unit calculates the moving route of the second terminal based on the position information of the second terminal during the first predetermined period.
4. Any one of claims 1 to 3, further comprising a determination unit that determines the state of the second terminal or the state of the device to which the second terminal is attached based on the result calculated by the second calculation unit. Positioning system according to paragraph.
5. The determining unit according to claim 4, wherein the determining unit determines that the second terminal is moving while the intensity of the radio wave received from the second terminal is maintained at a first threshold or more. positioning system.
further comprising a storage unit that stores the owner of the third terminal,
The positioning system according to claim 4 or 5, wherein the storage unit further associates and stores the determination result of the state of the second terminal and the owner of the third terminal.
further comprising a timer for measuring time information,
7. The positioning system according to claim 6, wherein the storage unit further associates and stores the determination result of the state of the second terminal and the time information measured by the timer.
The positioning system according to any one of claims 1 to 7, wherein the first calculation unit and the second calculation unit are realized by a processor of a server that can communicate with the third terminal.
The positioning system according to any one of claims 1 to 7, wherein the first calculation unit and the second calculation unit are realized by a processor of the third terminal.
The first computing unit is implemented by a processor of the third terminal,
8. The positioning system according to any one of claims 1 to 7, wherein said second calculation unit is realized by a processor of a server capable of communicating with said third terminal.