JP2022116840A - Position identification system - Google Patents

Abstract

To simply and accurately identify a position of an object.SOLUTION: Each of multiple fixed beacons 20 outputs electric waves including a fixed beacon ID which indicates identification information of the beacon. A moving beacon 30 outputs, to a server 50, ID information including a fixed beacon ID of a fixed beacon having the highest electric wave intensity out of the electric waves output from each of the multiple fixed beacons 20 and a moving beacon ID which indicates identification information of the moving beacon. The server 50 specifies a fixed beacon ID having the highest frequency out of the fixed beacon IDs included in multiple pieces of ID information, on the basis of the multiple pieces of ID information acquired within a predetermined time. The server 50 identifies that the moving beacon 30 is located in a spot within a predetermined range for which a distance with a fixed beacon corresponding to the specified fixed beacon is defined in advance.SELECTED DRAWING: Figure 2

Description

The present invention relates to position determination systems.

Conventionally, there is known a technique of determining a position within a structure using an external signal (eg, Patent Document 1). The technique of Patent Document 1 generates correspondence information between the identification information of the sign that sent the external signal and the area inside the structure, counts the number of signs associated with the area inside the structure, and detects the presence of an information processing device. The area to be used is determined (for example, claim 1 of Patent Document 1). In addition, Patent Document 1 discloses that when the corresponding information includes radio wave intensity information of the external signal and the area cannot be determined based on the number of signs, the area is determined based on the radio wave intensity information of the external signal. (For example, claim 2 of Patent Document 1).

Also, there is known a technique for measuring the position of a terminal equipped with a radio wave transmitter or a radio wave receiver (for example, Patent Literature 2). The technique of Patent Document 2 acquires the variation of the position measurement result for each number of data of the radio wave intensity emitted from the radio wave transmitter used when performing the position measurement of the terminal for each position of the terminal, and acquires it by the acquisition process. Based on the obtained information, a relational expression is calculated for each position of the terminal, which indicates the change in the variation of the position measurement result with respect to the number of radio wave intensity data. Then, the technique of Patent Document 2 acquires the position information of the terminal, and based on the relational expression corresponding to the position information of the terminal and the required position measurement accuracy, the radio wave transmission per unit time in the radio wave transmitter The number of times is set (for example, claim 1 of Patent Document 2).

Also, there is known a technique for detecting the position of a transmitter that periodically transmits radio signals (for example, Patent Document 3). The technique of Patent Document 3 acquires radio signal intensity information indicating time-series changes in radio signal intensity when each of a plurality of communication devices receives a radio signal periodically transmitted from a transmitter within a predetermined period. Then, the technique of Patent Document 3 subtracts a threshold value from the radio wave intensity when a wireless signal is received within a predetermined period based on the time-series change in the radio wave intensity indicated by the acquired radio wave intensity information for each of a plurality of communication devices. A variance value is calculated by multiplying the obtained value by the time interval from the start time of the predetermined period to the reception time of the radio signal. Then, the technique of Patent Document 3 determines the communication device with the largest calculated variance value among the plurality of communication devices as the communication device corresponding to the position of the transmitter (for example, claim 1 of Patent Document 3). ).

JP 2017-198567 A JP 2019-007863 A JP 2017-090284 A

In the techniques disclosed in Patent Documents 1 to 3, the radio wave intensity is used to identify the position of the object.

For example, when the information terminal 300 of Patent Document 1 cannot determine the area in which it is located based on the number of beacons that are signs that output external signals, the information terminal 300 can determine the area in which is located. However, the technique of Patent Literature 1 needs to determine once whether or not it is possible to determine its own position based on the number of beacons. Therefore, for example, if the information terminal 300 does not have computing power, it cannot determine its own position.

On the other hand, in the technique of Patent Document 2, it is necessary to set in advance a relational expression that indicates changes in variation in position measurement results with respect to the number of radio field intensity data. Further, the technique of Patent Document 3 is a value obtained by subtracting a threshold value from the radio wave intensity when a radio signal is received within a predetermined period, and multiplying the value by the time interval from the start time of the predetermined period to the reception time of the radio signal. A variance value needs to be calculated.

Therefore, the techniques of Patent Documents 1 to 3 have a problem that the processing for identifying the position of the object is complicated, and the position of the object cannot be easily and precisely identified.

SUMMARY OF THE INVENTION An object of the present invention is to specify the position of an object simply and accurately in consideration of the above facts.

A first aspect of the present invention is a position specifying system including a plurality of radio wave output means, a first specifying means, and a second specifying means, wherein each of the radio wave output means is a radio wave representing its own identification information. outputting a radio wave including an output means ID, wherein the first specifying means includes the radio wave output means ID of the radio wave output means having the highest radio wave intensity among the radio waves output from each of the plurality of radio wave output means; ID information including a first specifying means ID representing the identification information of itself is output to the second specifying means, and the second specifying means outputs a plurality of ID information based on the plurality of ID information acquired within a predetermined time Among the radio wave output means IDs included in the ID information, the radio wave output means ID having the highest frequency is specified, and the distance between the radio wave output means corresponding to the specified radio wave output means ID is determined. The position specifying system specifies that the first specifying means is positioned within a predetermined range. Thereby, the position of the second specifying means can be specified easily and accurately. Moreover, the position of the object on which the second specifying means is installed can be specified easily and accurately.

Further, in the position specifying system of the second aspect of the present invention, the timing of outputting the radio waves by the radio wave output means and the timing of receiving the radio waves by the first specifying means are not synchronized. The radio wave output means ID having the highest frequency is specified, and the first specifying means is positioned within a predetermined distance from the radio wave output means corresponding to the specified radio wave output means ID. By specifying, even if the timing of outputting radio waves by the radio wave output means and the timing of receiving radio waves by the first specifying means are not synchronized, the object on which the second specifying means is installed can be located.

Further, each of the plurality of radio wave output means of the position specifying system according to the third aspect of the present invention outputs the radio wave at a predetermined time interval, and the first specifying means outputs the plurality of radio wave output means. The radio waves output from each are received at time intervals different from the predetermined time intervals.

In the position specifying system according to the fourth aspect of the present invention, each of the plurality of radio wave output means outputs the radio wave at a predetermined time interval, and the first specifying means outputs the radio wave of the plurality of radio wave output means. The radio waves output from each are received at time intervals shorter than the predetermined time interval. As a result, it is possible to suppress consumption of the battery provided in the radio wave output means.

Further, the radio wave output means of the position specifying system according to the fifth aspect of the present invention is a beacon installed at a predetermined point, and the first specifying means is a beacon installed on a mobile object, a smartphone, or It is a tablet, and the second specifying means is a server, a gateway, a smart phone, or a tablet.

ADVANTAGE OF THE INVENTION According to this invention, the effect that the position of a target object can be pinpointed easily and accurately is acquired.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure for demonstrating the outline|summary of the position pinpointing system of 1st Embodiment. It is a block diagram showing an example of composition of position pinpointing system 10 concerning a 1st embodiment. 4 is a diagram for explaining the timing of radio wave output from a fixed beacon 20 and the timing of radio wave reception by a mobile beacon 30. FIG. FIG. 4 is a diagram for explaining fluctuations in radio wave intensity; 3 is a diagram showing an example of ID information stored in a data storage unit 202; FIG. It is a figure which shows an example of a position pinpointing result. 3 is a diagram showing a configuration example of a computer of a server 50 of the position specifying system 10 of the first embodiment; FIG. 4 is a diagram showing an example of a sequence executed by each device of the position specifying system 10; FIG. 4 is a diagram showing an example of a position specifying processing routine executed by a server 50 of the position specifying system 10; FIG. FIG. 10 is a diagram for explaining an overview of a position specifying system according to a second embodiment; FIG. FIG. 11 is a block diagram showing an example of a configuration of a position specifying system 210 according to a second embodiment; FIG. 4 is a diagram for explaining the timing of output of radio waves from a fixed beacon 20 and the timing of reception of radio waves by an information terminal 230. FIG. It is a figure for demonstrating a modification.

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

[First Embodiment]

<Configuration of positioning system>

FIG. 1 is a diagram for explaining the outline of the position specifying system of the first embodiment. As shown in FIG. 1, the position specifying system 10 of the first embodiment includes a plurality of fixed beacons 20-1, 20-2, and 20-3, which are examples of a plurality of radio wave output means, and a first specifying means. It comprises a mobile beacon 30 as an example, a gateway 40 as an example of a log collector, and a server 50 as an example of a second identifying means. Each of the plurality of fixed beacons 20-1, 20-2, 20-3 is installed at a predetermined point on a construction site, for example. In addition, hereinafter, it is simply referred to as "stationary beacon 20" unless it indicates a specific stationary beacon. Also, although three fixed beacons 20-1, 20-2, 20-3 are shown in the example of FIG. good.

Mobile beacons 30 are installed, for example, in equipment 35 used at construction sites. In FIG. 1, a mobile beacon 30 is installed on an aerial work vehicle, which is an example of a mobile body that is equipment 35 used at a construction site. At a construction site, there are cases where it is desired to specify where equipment used in construction work is located.

Therefore, in the position specifying system of this embodiment, the mobile beacons 30 are installed in the equipment 35 used at the construction site, and the fixed beacons 20 are installed at each location of the construction site. The mobile beacon 30 receives radio waves output from each of the plurality of fixed beacons 20 . Then, the mobile beacon 30 transmits ID information including a fixed beacon ID, which is the identification information of the fixed beacon with the highest radio wave intensity, and a mobile beacon ID representing its own identification information, to the server 50 based on the radio wave intensity. Send. Note that the ID information output from the mobile beacon 30 is once received by the gateway 40 . The gateway 40 then transmits the ID information transmitted from the mobile beacon 30 to the server 50 .

The server 50 receives the ID information transmitted from the gateway 40 and identifies that the mobile beacon 30 exists near the fixed beacon 20 corresponding to the fixed beacon ID included in the ID information. Note that communication is performed between the plurality of fixed beacons 20 and the mobile beacons 30 using, for example, Bluetooth Low Energy (BLE) (registered trademark), which is an example of a known short-range wireless communication method. Further, communication is performed between the mobile beacon 30 and the gateway 40 and between the gateway 40 and the server 50 by, for example, Long Term Evolution (LTE) (registered trademark), which is an example of a known wireless communication system. A specific description will be given below.

FIG. 2 is a block diagram showing an example of the configuration of the position specifying system 10 according to the first embodiment. Location system 10 can be functionally represented in a configuration including a plurality of fixed beacons 20, mobile beacons 30, gateway 40, and server 50, as shown in FIG.

(fixed beacon)
The fixed beacon 20 outputs radio waves containing a fixed beacon ID representing its own identification information. Specifically, the fixed beacon 20 outputs radio waves each time a predetermined time period elapses. The timing at which the fixed beacon 20 outputs radio waves and the timing at which the mobile beacon 30 receives radio waves are often not synchronized.

FIG. 3 is a diagram for explaining the timing of radio wave output from the fixed beacon 20 and the timing of radio wave reception by the mobile beacon 30. As shown in FIG.

As shown in FIG. 3, the fixed beacon 20 outputs radio waves at time intervals t20 (for example, 1 sec). For example, the time interval t20 at which the fixed beacon 20 outputs radio waves is set to be as long as possible in order to prevent the battery of the fixed beacon 20 from depleting. On the other hand, the mobile beacon 30 receives radio waves at time intervals t30 (for example, 400 msec). A window time (for example, 2.5 ms) is set to represent the time during which radio waves are received in one radio wave reception R by the mobile beacon 30, and the radio waves are received within this window time.

Thus, each of the plurality of fixed beacons 20 outputs radio waves at a predetermined time interval t20, and the mobile beacon 30 outputs the radio waves output from each of the plurality of fixed beacons 20 at a time different from the predetermined time interval t20. It is received at interval t30. Note that, as shown in FIG. 3, the mobile beacon 30 receives radio waves output from each of the plurality of fixed beacons 20 at a time interval t30 shorter than the predetermined time interval t20.

As shown in FIG. 3, mobile beacon 30 receives radio waves at time t31 and transmits ID information to gateway 40 at time t32. The mobile beacon 30 sequentially transmits the ID information to the gateway 40 by repeating the processing in the time slot t33 shown in FIG. Gateway 40 receives the ID information at time interval t40 and transmits the ID information to server 50 at time interval t41.

As shown in FIG. 3, when the timing of radio wave output by the fixed beacon 20 and the timing of radio wave reception by the mobile beacon 30 are not synchronized, the radio wave intensity of the radio waves received by the mobile beacon 30 fluctuates. sell.

FIG. 4 shows a diagram for explaining fluctuations in radio wave intensity. As shown in FIG. 4, when a plurality of fixed beacons 20-1, 20-2, 20-3, 20-4, 20-5, and 20-6 exist around the mobile beacon 30, If there is, the radio wave intensity of the fixed beacon 20-6 closest to the mobile beacon 30 is maximized.

However, as described above, when the radio wave transmission timing of the fixed beacon 20 and the radio wave reception timing of the mobile beacon 30 are not synchronized, the radio wave intensity of the radio wave received by the mobile beacon 30 fluctuates. , the radio wave intensity of the radio wave output from the fixed beacon 20-3 may be maximum. In this case, an error occurs in the position of the mobile beacon 30 specified by the server 50 .

By setting a short time interval t20 for radio wave transmission of the fixed beacon 20, a long time period t31 of the mobile beacon 30, and a long window time in one radio wave reception R by the mobile beacon 30, It is possible to reduce the occurrence of position specifying errors based on fluctuations in radio wave intensity. Thereby, the accuracy of specifying the position of the mobile beacon 30 can be improved.

However, by increasing the frequency of radio wave transmission by the fixed beacon 20, the battery consumption of the fixed beacon 20 becomes severe. In addition, by setting the time period t31 and the window time for receiving radio waves in the mobile beacon 30 to be long, the battery consumption of the mobile beacon 30 becomes severe. Regarding this point, there is a problem that it is desirable to reduce the frequency of battery replacement of the fixed beacons 20 installed at various locations in the construction site and the mobile beacons 30 installed on the equipment 35 as much as possible.

Therefore, in the position specifying system 10 of the present embodiment, the fixed beacon IDs transmitted from the mobile beacons 30 are collected over a predetermined period of time while the frequency of radio wave transmission by the fixed beacons 20 is kept low. Identify the fixed beacon ID that appears most frequently. Positioning system 10 then identifies mobile beacons 30 as being near fixed beacons with the highest frequency. As a result, even when the radio wave intensity fluctuates, the position of the mobile beacon 30 itself or the object on which the mobile beacon 30 is installed can be specified with high accuracy. Details will be described later.

(moving beacon)
The mobile beacon 30 identifies the fixed beacon ID of the fixed beacon 20 having the highest radio wave intensity among the radio waves output from each of the plurality of fixed beacons 20 . For example, when a plurality of fixed beacons 20 exist around itself, the mobile beacon 30 may receive radio waves output from each of the plurality of fixed beacons 20 within the same window time. At that time, the mobile beacon 30 holds only the fixed beacon ID of the fixed beacon 20 having the highest radio wave intensity among the received fixed beacons 20 . Then, the mobile beacon 30 transmits ID information including the mobile beacon ID representing its own identification information and the fixed beacon ID of the fixed beacon 20 with the highest radio wave intensity to the server 50 via the gateway 40 .

(gateway)
Gateway 40 transmits the ID information output from fixed beacon 20 to server 50 . For example, the gateway 40 is installed at each location of the construction site.

(server)
Server 50 identifies the location of mobile beacon 30 . The server 50 functionally includes a data collection unit 200, a data storage unit 202, and a position specifying unit 204, as shown in FIG.

The data collection unit 200 sequentially receives ID information transmitted from the gateway 40 . The data collection unit 200 then stores the received ID information in the data storage unit 202 .

The data storage unit 202 stores ID information received at each time. FIG. 5 shows an example of ID information stored in the data storage unit 202. As shown in FIG. In the example of FIG. 5, the reception time when the server 50 received the ID information is associated with the ID information.

The position specifying unit 204 identifies fixed beacon IDs included in the plurality of ID information based on the plurality of pieces of ID information stored in the data storage unit 202 and acquired within a predetermined period of time (for example, 1 minute or 15 minutes). Among them, the fixed beacon ID with the highest frequency is identified. For example, when data as shown in FIG. ” as the fixed beacon ID with the highest frequency. For example, in the example shown in FIG. 5, the fixed beacon ID "00001" appears three times within the predetermined time T, the fixed beacon ID "00002" appears once, and the fixed beacon ID "00003" appears Since it appears once, the fixed beacon ID "00001" is identified as having the highest frequency. Note that the predetermined time T is set in advance.

Then, the position specifying unit 204 specifies that the mobile beacon 30 is positioned within a predetermined distance from the fixed beacon corresponding to the specified fixed beacon ID. For example, the position specifying unit 204 specifies that the mobile beacon 30 corresponding to the mobile beacon ID "00001" exists near the fixed beacon corresponding to the fixed beacon ID "00001".

It should be noted that the location identification result of the mobile beacon 30 is stored in the data storage unit 202, for example. For example, the position specifying unit 204 assigns the fixed beacon ID "00001" to the data stored in the data storage unit 202 as a position specifying result as shown in FIG. As a result, it is identified that the mobile beacon 30 existed near the fixed beacon corresponding to the fixed beacon ID "00001" during the reception times T1 to T5.

As described above, according to the position specifying system of the present embodiment, the fixed beacon IDs transmitted from the mobile beacons 30 are collected over a predetermined period of time, and the fixed beacon ID that appears most frequently within the predetermined period of time is identified. By doing so, the position of the object on which the mobile beacon 30 is installed can be specified easily and accurately.

The server 50 of the position specifying system 10 can be implemented by, for example, a computer 60 as shown in FIG. A computer 60 that implements the server 50 includes a CPU 61 , a memory 62 as a temporary storage area, and a nonvolatile storage section 63 . The computer 60 also includes an input/output interface (I/F) 64 to which an input/output device (not shown) is connected, and a read/write (R/W) unit that controls reading and writing of data to and from the recording medium 69. 65. The computer also has a network I/F 66 connected to a network such as the Internet. The CPU 61 , memory 62 , storage unit 63 , input/output I/F 64 , R/W unit 65 and network I/F 66 are connected to each other via a bus 67 .

The storage unit 63 can be implemented by a Hard Disk Drive (HDD), Solid State Drive (SSD), flash memory, or the like. The storage unit 63 as a storage medium stores a program for causing the computer to function. The CPU 61 reads out the program from the storage unit 63, develops it in the memory 62, and sequentially executes the processes of the program.

Note that the fixed beacon 20, the mobile beacon 30, and the gateway 40 are realized by, for example, a semiconductor integrated circuit, more specifically an Application Specific Integrated Circuit (ASIC) or the like. Further, the server 50 may also be implemented by, for example, a semiconductor integrated circuit, more specifically an ASIC or the like. Fixed beacon 20, mobile beacon 30 and gateway 40 may also be implemented by computer 60 as shown in FIG.

<Action of Positioning System>

Next, operation of the position specifying system 10 will be described. Each device of the positioning system 10 executes a sequence as shown in FIG.

In step S100, the fixed beacon 20 outputs radio waves including a fixed beacon ID representing its own identification information at a predetermined transmission timing.

In step S102, the mobile beacon 30 receives the radio wave output from the fixed beacon 20 in step S100 at a predetermined reception timing. Then, in step S102, the mobile beacon 30 sets the fixed beacon ID of the fixed beacon 20 having the highest radio wave intensity among the radio waves output from each of the plurality of fixed beacons 20, and the mobile beacon ID representing its own identification information. to the gateway 40.

At step S<b>104 , the gateway 40 transmits the ID information transmitted from the mobile beacon 30 at step S<b>102 to the server 50 .

In step S<b>106 , the data collection unit 200 of the server 50 receives the ID information transmitted from the gateway 40 in step S<b>104 and stores it in the data storage unit 202 .

Next, the server 50 executes a localization processing routine as shown in FIG. For example, the server 50 executes the position specifying processing routine shown in FIG. 9 each time a predetermined time T elapses.

In step S<b>200 , the position specifying unit 204 of the server 50 reads ID information within a predetermined time period T from the data storage unit 202 .

In step S202, the position specifying unit 204 of the server 50 specifies the fixed beacon ID with the highest frequency among the fixed beacon IDs included in the plurality of pieces of ID information based on the ID information read out in step S200. .

In step S204, the position specifying unit 204 of the server 50 determines whether the mobile beacon 30 is located within a predetermined distance from the fixed beacon corresponding to the fixed beacon ID specified in step S202. identify that Thereby, the position of the device in which the mobile beacon 30 is installed is also identified.

In step S<b>206 , the position specifying unit 204 of the server 50 stores the position of the mobile beacon 30 specified in step S<b>204 in the data storage unit 202 . For example, in the format shown in FIG. 6, the fixed beacon IDs of fixed beacons existing near the mobile beacon 30 are stored in the data storage unit 202 as the position identification result.

As described above, the position specifying system of the first embodiment is a position specifying system including a plurality of fixed beacons, mobile beacons, and servers. Each of the plurality of fixed beacons of the position specifying system outputs a radio wave containing a fixed beacon ID representing its own identification information. It outputs ID information including the fixed beacon ID of the large fixed beacon and the mobile beacon ID representing its own identification information to the server. The server identifies the fixed beacon ID with the highest frequency among the fixed beacon IDs included in the plurality of ID information based on the plurality of pieces of ID information acquired within a predetermined period of time. A mobile beacon is identified as being positioned within a predetermined distance from the corresponding fixed beacon. This makes it possible to easily and accurately identify the position of the object on which the mobile beacon is installed. Specifically, by specifying the position of the mobile beacon through two-stage processing, the position of the mobile beacon can be specified with high accuracy.

Further, according to the position specifying system of the first embodiment, even if the timing of outputting radio waves by a fixed beacon and the timing of receiving radio waves by a mobile beacon are not synchronized, the position of a mobile beacon can be accurately specified. be able to. As a result, the position of the mobile beacon can be specified with high accuracy even if the radio wave transmission interval by the fixed beacon is lengthened. In addition, this makes it possible to lengthen the interval at which radio waves are transmitted by the fixed beacons, and it is possible to suppress the consumption of batteries provided in the fixed beacons.

In addition, even if the mobile beacon does not have the computational processing capability for specifying its own position, the position of the mobile beacon can be specified by calculation by the server.

[Second embodiment]
Next, a second embodiment will be described. The position specifying system of the second embodiment differs from that of the first embodiment in that it specifies the position of the information terminal instead of the mobile beacon 30 . In the second embodiment, the same reference numerals are given to the parts of the second embodiment that are the same as those of the first embodiment, and the description thereof will be omitted.

FIG. 10 is a diagram for explaining the outline of the position specifying system of the second embodiment. As shown in FIG. 10, the position specifying system 210 of the second embodiment includes a fixed beacon 20 that is an example of radio wave output means, an information terminal 230 that is an example of first specifying means, and an example of second specifying means. and a server 50 .

In the position specifying system 210 of the second embodiment, the information terminal 230 transmits to the server 50 ID information including an information terminal ID representing its own identification information and the fixed beacon ID of the fixed beacon 20 having the highest radio wave intensity. The information terminal 230 is, for example, a smart phone, a tablet, or the like held by a construction site worker OP or the like.

FIG. 11 is a block diagram showing an example of the configuration of a position specifying system 210 according to the second embodiment. The position specifying system 10 is functionally represented by a configuration including a plurality of fixed beacons 20-1, 20-2, 20-3, an information terminal 230, and a server 50, as shown in FIG. be able to.

The information terminal 230 receives a radio wave including a fixed beacon ID transmitted from each of the plurality of fixed beacons 20, and selects the fixed beacon 20 having the highest radio wave intensity among the radio waves output from each of the plurality of fixed beacons 20. Identify a fixed beacon ID. Then, the information terminal 230 transmits to the server 50 ID information including an information terminal ID representing its own identification information and the fixed beacon ID of the fixed beacon 20 with the highest radio wave intensity.

FIG. 12 shows a diagram for explaining the timing of radio wave output from the fixed beacon 20 and the timing of radio wave reception by the information terminal 230 .

As shown in FIG. 12, the fixed beacon 20 outputs radio waves at time intervals t20 as in the first embodiment. On the other hand, the information terminal 230 receives radio waves at a time interval t230 shorter than the time interval t20. A window time is set to represent the time during which the information terminal 230 receives the radio waves in one radio wave reception R, and the radio waves are received within this window time. Then, the information terminal 230 transmits the ID information to the server 50 at the time interval t231.

Other configurations and actions of the position specifying system 210 according to the second embodiment are the same as those of the first embodiment, so description thereof will be omitted.

As explained above, the position specifying system of the second embodiment includes a plurality of fixed beacons, an information terminal, and a server. Each of the fixed beacons of the position specifying system outputs a radio wave containing a fixed beacon ID representing its own identification information, and the information terminal selects the fixed beacon with the highest radio wave intensity among the radio waves output from each of the plurality of fixed beacons. and an information terminal ID representing its own identification information to the server. Then, the information terminal identifies the fixed beacon ID with the highest frequency among the fixed beacon IDs included in the plurality of ID information based on the plurality of pieces of ID information acquired within a predetermined period of time. It specifies that the information terminal is positioned within a predetermined distance from the fixed beacon corresponding to the beacon ID. As a result, the position of the information terminal can be specified easily and accurately.

The present invention is not limited to the above-described embodiments, and various modifications and applications are possible without departing from the gist of the present invention.

For example, in the above-described first embodiment, the case where the ID information is transmitted to the server 50 via the gateway 40 has been described as an example, but the present invention is not limited to this. For example, a position specifying system 310 as shown in FIG. 13 may be used, and ID information may be transmitted to the server 50 via the information terminal 230 of the second embodiment. As a result, the position of the object on which the mobile beacon 30 is installed can be easily and accurately specified without installing the gateway 40 at each location of the construction site.

Further, in the above embodiment, the case of using LTE and BLE as communication schemes has been described as an example, but the present invention is not limited to this. Any communication method may be used. Further, in the above embodiment, the fixed beacon 20 is used as the radio wave output means, but any radio wave output means may be used. Also, any type of first identifying means may be used.

Further, in the above embodiment, the case where the second identifying means is the server 50 has been described as an example, but it is not limited to this. For example, the second identifying means may be the gateway 40 of the first embodiment or the information terminal 230 (for example, smart phone or tablet) of the second embodiment. In this case, the gateway 40 or the information terminal 230 has the function of the server 50 of the above embodiment.

In the above description, the program according to the present invention is pre-stored (installed) in the storage unit. It can also be provided in recorded form.

10, 210, 310 position specifying system 20 fixed beacon 30 mobile beacon 35 device 40 gateway 50 server 60 computer 200 data collecting unit 202 data storage unit 204 position specifying unit 230 information terminal

Claims (5)

A position specifying system including a plurality of radio wave output means, a first specifying means, and a second specifying means,
each of the radio wave output means outputs a radio wave including a radio wave output means ID representing its own identification information;
The first specifying means represents the radio wave output means ID of the radio wave output means having the highest radio wave intensity among the radio waves output from each of the plurality of radio wave output means and the identification information of the radio wave output means itself. outputting ID information including an ID to the second identifying means;
The second identifying means identifies the radio wave output means ID having the highest frequency among the radio wave output means IDs included in the plurality of ID information based on the plurality of ID information acquired within a predetermined time. Identifying and identifying that the first identifying means is located at a location where the distance between the radio wave output means corresponding to the identified radio wave output means ID is within a predetermined range,
localization system. The timing of outputting the radio waves by the radio wave output means and the timing of receiving the radio waves by the first specifying means are not synchronized,
The location system of claim 1. each of the plurality of radio wave output means outputs the radio wave at predetermined time intervals;
The first identifying means receives the radio waves output from each of the plurality of radio wave output means at time intervals different from the predetermined time intervals.
3. The location system of claim 2. each of the plurality of radio wave output means outputs the radio wave at predetermined time intervals;
The first identifying means receives the radio waves output from each of the plurality of radio wave output means at time intervals shorter than the predetermined time interval.
4. The location system of claim 3. The radio wave output means is a beacon installed at a predetermined point,
The first identifying means is a beacon, a smartphone, or a tablet installed on a mobile body,
The second identifying means is a server, gateway, smartphone, or tablet,
The position specifying system according to any one of claims 1 to 3.

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