JP7325031B2 - Location information acquisition system - Google Patents

Description

TECHNICAL FIELD The present disclosure generally relates to a location information acquisition system, a location information acquisition method, and a program, and more specifically, a location information acquisition system and location information acquisition for acquiring location information of an information terminal that transmits a radio signal including its own identification information. It relates to a method and a program.

Conventionally, a local positioning system (LPS: Local Positioning System) including a receiver and an LPS server is known. A local positioning system measures the position of a mobile terminal within a specific space (area), such as a space of interest.

The receiver has a plurality of receivers. A plurality of receivers are positioned in or around the object space. The receiver is configured to wirelessly communicate with the mobile terminal. Here, the receiver receives identification information by wireless communication from at least a mobile terminal existing in the target space.

The receiver generates received information about the received signal strength indication (RSSI) of the radio signal based on the received radio signal. After receiving the wireless signal from the mobile terminal, each receiver transmits receiver information and reception information to the LPS server in addition to the identification information received from the mobile terminal. The receiver holds receiver information assigned to each receiver in a non-volatile memory or the like of the receiver.

The LPS server has a communication section, a position specifying section, a storage section, and a processing section.

The communication unit receives identification information, receiver information, and reception information from each of the plurality of receivers. The communication unit outputs identification information, receiver information, and reception information received from the plurality of receivers to the position specifying unit as LPS data.

The position specifying unit specifies the position in the target space of the mobile terminal existing in the target space based on the LPS data (identification information, receiver information and reception information).

JP 2018-182705 A

In the local positioning system described in Patent Document 1, the received signal strength of the receiver varies due to the distance between the receiver and the mobile terminal (information terminal), and the accuracy of the position specified by the LPS server decreases. there was a case.

An object of the present disclosure is to provide a position information acquisition system capable of accurately acquiring position information of an information terminal.

A position information acquisition system according to an aspect of the present disclosure includes an acquisition unit, a receiver, and a position reference device. The acquisition unit acquires the identification information of an information terminal that transmits a radio signal including its own identification information. The receiver is located at a facility and transmits to the acquisition unit a signal containing information contained in the received radio signal. The position reference device is arranged in the facility at a position closer to the information terminal than the receiver, and transmits a reference signal including its own coordinate information within the facility. The acquisition unit acquires the facility of the information terminal based on the identification information acquired from the information terminal through the receiver and the reference signal acquired from the position reference device through the receiver. Get location information within The radio signal received by the receiver contains information on the measured received signal strength of the reference signal measured by the information terminal. The position information acquisition system includes a plurality of receivers. A signal transmitted from each of the plurality of receivers to the acquisition unit includes information on a measured value of received signal strength of a radio signal transmitted from the information terminal. The acquisition unit stores coordinate information of each of the plurality of receivers. The acquisition unit further uses the measured values of the received signal strength of the radio signal transmitted from the information terminal and the coordinate information of each of the plurality of receivers, which are measured in each of the plurality of receivers, to obtain the Positional information of the information terminal within the facility is estimated.
A position information acquisition system according to another aspect of the present disclosure includes an acquisition unit, a receiver, and a position reference device. The acquisition unit acquires the identification information of an information terminal that transmits a radio signal including its own identification information. The receiver is located at a facility and transmits to the acquisition unit a signal containing information contained in the received radio signal. The position reference device is arranged in the facility at a position closer to the information terminal than the receiver, and transmits a reference signal including its own coordinate information within the facility. The acquisition unit acquires the facility of the information terminal based on the identification information acquired from the information terminal through the receiver and the reference signal acquired from the position reference device through the receiver. Get location information within The position reference device, upon receiving a radio signal from the information terminal, transmits the reference signal to the receiver. The reference signal includes information on the measured value of received signal strength of the radio signal from the information terminal, which is measured by the position reference device. The position information acquisition system includes a plurality of receivers. A signal transmitted from each of the plurality of receivers to the acquisition unit includes information on a measured value of received signal strength of the reference signal. The acquisition unit stores coordinate information of each of the plurality of receivers. The acquisition unit further uses the measured value of the received signal strength of the reference signal measured by each of the plurality of receivers and the coordinate information of each of the plurality of receivers to obtain, within the facility of the information terminal, Estimate the location information of

The location information acquisition system of the present disclosure can acquire location information of an information terminal with high accuracy.

FIG. 1 is a schematic diagram of a facility to which a position information acquisition system according to Embodiment 1 is applied. FIG. 2 is a configuration diagram of the position information acquisition system of the same. FIG. 3 is a sequence diagram for explaining the operation of the position information acquisition system; FIG. 4 is a configuration diagram of a position information acquisition system according to the second embodiment. FIG. 5 is a sequence diagram for explaining the operation of the position information acquisition system; FIG. 6 is a schematic diagram of a facility to which the position information acquisition system according to Embodiment 3 is applied. FIG. 7 is a configuration diagram of the position information acquisition system of the same. FIG. 8 is a sequence diagram for explaining the operation of the position information acquisition system; FIG. 9 is a configuration diagram of a position information acquisition system according to the fourth embodiment. FIG. 10 is a sequence diagram for explaining the operation of the position information acquisition system; FIG. 11 is a sequence diagram illustrating operations of the position information acquisition system according to the fifth embodiment.

(Embodiment 1)
(1) Overview A location information acquisition system 10 of the present embodiment will be described below with reference to FIGS. 1 to 3. FIG.

The location information acquisition system 10 of this embodiment is used for a positioning system (LPS: Local Positioning System) for measuring the location of the information terminal 40 in the facility 100 . The "facility" referred to in this disclosure includes, for example, office buildings, factories, commercial complexes, museums, museums, amusement facilities, theme parks, airports, railway stations, dome stadiums, hotels, residences, etc. including buildings built in In addition, the "facility" may be, for example, a mobile object such as a ship or a railroad vehicle. A positioning system using the positional information acquisition system 10 of this embodiment is used to measure the position of the information terminal 40 in the facility 100 .

The “information terminal” referred to in the present disclosure is, for example, a portable terminal carried by the user 1 who uses the facility 100, and is, for example, a communication terminal such as a smart phone. In addition, the “information terminal” referred to in the present disclosure is not limited to a smartphone, and may be a tablet-type mobile terminal, or a transmitter dedicated to a positioning system such as a tag.

In this embodiment, for example, a case where the position information acquisition system 10 is applied to a positioning system for measuring the position of an information terminal 40 in a facility 100 such as an office building will be described. Further, in the present embodiment, a case where the information terminal 40 is a smart phone carried by the user 1 will be described as an example.

(2) Configuration The location information acquisition system 10 of this embodiment includes an acquisition unit 30 (see FIG. 2), a receiver 20, and a location reference device 50. FIG. Acquisition unit 30 acquires identification information of information terminal 40 that transmits a radio signal including its own identification information. The receiver 20 is arranged at the facility 100 and transmits a signal including information contained in the received radio signal to the acquisition unit 30 . The position reference device 50 is arranged at a position where the information terminal 40 can be closer to the receiver 20 than the receiver 20 in the facility 100 and transmits a reference signal including coordinate information within the facility 100 itself. Based on the identification information acquired from the information terminal 40 via the receiver 20 and the reference information acquired from the position reference device 50 via the receiver 20, the acquisition unit 30 detects the information terminal 40 within the facility 100. Get the location information of .

In this embodiment, the information terminal 40 is not a component of the positional information acquisition system 10, but may be included in the positional information acquisition system 10 as a component of the positional information acquisition system 10. FIG.

The information terminal 40 includes a communication unit 41 having a communication function for wireless communication using radio waves. The communication unit 41 has, as communication functions, a reception function of receiving a radio signal from the position reference device 50 and a transmission function of transmitting (transmitting) the radio signal to the receiver 20 . The communication unit 41 has a function of measuring the received signal strength indication (RSSI), which is the signal strength of the received radio signal, when the radio signal transmitted from the position reference device 50 is received. . As a communication method of the communication unit 41, for example, wireless communication is performed using a Bluetooth (registered trademark) Low Energy communication method. The communication method of the information terminal 40 is not limited to Bluetooth (registered trademark) Low Energy, and may be, for example, Wi-Fi (registered trademark).

Here, the information terminal 40 has identification information and transmits (transmits) a radio signal including its own identification information. The identification information is, for example, Bluetooth (registered trademark) Device Address. The radio signal transmitted from the information terminal 40 is a radio signal using radio waves. In the information terminal 40 , the identification information is stored in the storage section 42 of the information terminal 40 . The storage unit 42 is, for example, nonvolatile memory such as EEPROM. Although only one information terminal 40 is illustrated in FIGS. 1 to 3, the number of information terminals 40 is not limited to one, and may be plural. Here, the plurality of information terminals 40 have different identification information. When a plurality of users 1 use the facility 100, the plurality of users 1 carry individual information terminals 40. FIG. In other words, the information terminal 40 and the user 1 are in one-to-one correspondence, and the identification information of the information terminal 40 is associated with the user 1. The identification information is different.

Each component of the positional information acquisition system 10 will be described in more detail below.

(2.1) Receiver The receiver 20 is arranged at the facility 100 . The receiver 20 is arranged on the ceiling 102 of the room 101 of the facility 100, for example, as shown in FIG.

The receiver 20 includes a first communication section 21 , a second communication section 22 and a control section 23 .

The first communication unit 21 has a function of receiving a radio signal transmitted from the position reference device 50 and acquiring coordinate information of the position reference device 50 . The first communication unit 21 performs wireless communication using the same communication method as the position reference device 50 . The communication method of the first communication unit 21 is not limited to Bluetooth (registered trademark) Low Energy, and may be a communication method such as Wi-Fi (registered trademark).

The second communication unit 22 communicates with the acquisition unit 30 inside the facility 100 . The communication method of the second communication unit 22 is, for example, a wired communication method, but is not limited to this. A compliant wireless communication system may also be used. Also, the second communication unit 22 may be connected to the acquisition unit 30 via a relay device such as a router or hub.

The control unit 23 is composed of, for example, a microcomputer having a processor and memory. That is, the control unit 23 is realized by a computer system having a processor and memory. The computer system functions as the control unit 23 by the processor executing appropriate programs. The program may be prerecorded in a memory, or may be provided by being recorded in a non-temporary recording medium such as a memory card or through an electric communication line such as the Internet. The receiver 20 has a receiver ID (Identification). The receiver ID is stored in the non-volatile memory of the receiver 20 or the like. Although only one receiver 20 is illustrated in FIGS. 1 to 3, the number of receivers 20 is not limited to one and may be plural. Here, the multiple receivers 20 have different receiver IDs.

The control unit 23 causes the second communication unit 22 to transmit a signal including the same information as the information included in the radio signal from the information terminal 40 received by the first communication unit 21 to the acquisition unit 30 . In other words, the control unit 23 transfers to the acquisition unit 30 a signal including information included in the wireless signal from the information terminal 40 received by the first communication unit 21 . The information contained in the radio signal from the information terminal 40 includes the identification number of the information terminal 40 and the coordinate information contained in the radio signal from the position reference device 50 received by the information terminal 40 . The information included in the radio signal from the information terminal 40 further includes information on the measured value (RSSI1) of the received signal strength indicator (RSSI) of the reference signal from the position reference device 50 received by the information terminal 40. there is

(2.2) Position reference device The position reference device 50 is arranged inside the facility 100 . The position reference device 50 is arranged at a position where the information terminal 40 can be closer than the receiver 20 in the facility 100 . Here, the position reference device 50 is arranged on the top surface of the desk 110 in the facility 100, as shown in FIG. 1, for example.

The position reference device 50 includes a communication section 51 , a storage section 52 and a control section 53 .

The communication unit 51 transmits a radio signal composed of a reference signal including coordinate information of the position reference device 50 within its own facility 100 . In the position reference device 50, the coordinate information of the position reference device 50 is stored in the storage unit 52, for example. The communication unit 51 periodically transmits a radio signal composed of a reference signal including coordinate information of the position reference device 50, for example. The communication unit 51 performs wireless communication using the same communication method as the information terminal 40 . The communication method of the communication unit 51 is not limited to Bluetooth (registered trademark) Low Energy, and may be a communication method such as Wi-Fi (registered trademark).

The control unit 53 is composed of, for example, a microcomputer having a processor and memory. That is, the control unit 53 is realized by a computer system having a processor and memory. The computer system functions as the control unit 53 by the processor executing appropriate programs. The program may be prerecorded in a memory, or may be provided by being recorded in a non-temporary recording medium such as a memory card or through an electric communication line such as the Internet. Although only one position reference device 50 is illustrated in FIGS. 1 to 3, the number of position reference devices 50 is not limited to one and may be plural.

(2.3) Acquisition Unit The acquisition unit 30 is, for example, a server. Acquisition unit 30 acquires identification information of information terminal 40 that transmits a radio signal including its own identification information. Here, based on the identification information obtained from the information terminal 40 via the receiver 20 and the coordinate information included in the reference information obtained from the position reference device 50 via the receiver 20, the obtaining unit 30 The positional information of the information terminal 40 within the facility 100 is acquired. Here, the acquisition unit 30 acquires the reference information of the position reference device 50 via the information terminal 40 and the receiver 20 .

Acquisition unit 30 includes communication unit 31 , storage unit 32 , and control unit 33 .

The communication unit 31 has the function of receiving signals from one or more receivers 20 . The signal from receiver 20 includes identification (ID) information of information terminal 40 and coordinate information of position reference device 50 . The signal from the receiver 20 also includes information on the measured value (RSSI1) of the received signal strength indicator (RSSI) of the reference signal measured by the information terminal 40 .

Communication unit 31 receives a signal from receiver 20 via communication network 80 in facility 100 . The communication method of the communication network 80 is wired communication, but is not limited to this, and may be wireless communication. Wired communication is, for example, wired communication using a LAN (Local Area Network) cable or the like, but is not limited to this, and may be, for example, power line communication using a power line. Note that the communication unit 31 may be capable of communicating with equipment provided in the facility 100 . The facilities are, for example, lighting fixtures and air conditioners arranged in the room 101 .

The storage unit 32 includes, for example, a hard disk drive, an optical disk drive, a memory card, and the like. The storage unit 32 stores the receiver IDs of the receivers 20 installed in the facility 100 and the location information regarding the installation positions thereof. Here, the positional information regarding the installation position of the receiver 20 includes coordinate information representing the installation position of the receiver 20 in a three-dimensional coordinate system with a predetermined position in the facility 100 as the origin. The storage unit 32 may also store history information about the location of the information terminal 40 within the facility 100 . The storage unit 32 also stores information related to the information terminal 40 . “Information related to an information terminal” in the present disclosure includes location information representing the location of the user 1 who owns the information terminal 40 in the facility 100 . In addition, the “information related to the information terminal” may include attribute information representing attributes of the user 1 who owns the information terminal 40 in addition to the position information of the information terminal 40 . For example, when an employee working in an office in the facility 100 carries the information terminal 40, the "information related to the information terminal" may include information identifying the employee (e.g., employee number, etc.).

The control unit 33 is composed of, for example, a microcomputer having a processor and memory. That is, the control unit 33 is realized by a computer system having a processor and memory. The computer system functions as the control unit 33 by the processor executing appropriate programs (such as a control program to be described later). The program including the control program may be prerecorded in the storage unit 32, or may be provided via an electric communication line such as the Internet, or recorded in a non-temporary recording medium such as a memory card.

When the communication unit 31 receives the signal from the receiver 20 , the control unit 33 performs position information acquisition processing for acquiring position information of the information terminal 40 . In the position information acquisition process, based on the identification information acquired from the information terminal 40 via the receiver 20 and the reference information acquired from the position reference device 50 via the receiver 20, the information terminal 40 within the facility 100 This is a process of acquiring position information in Further, the control unit 33 performs a process of linking the identification information of the information terminal 40 and the position coordinates of the information terminal 40 . Here, the signal received by the communication unit 31 from the receiver 20 includes the received signal strength of the radio signal received by the receiver 20, the identification information of the information terminal 40, the coordinate information of the position reference device 50, and the reception of the receiver 20. Machine ID etc. are included. In addition, the signal received by the communication unit 31 from the receiver 20 may include attribute information of the user 1 who owns the information terminal 40, for example.

The control unit 33 may further have a calculation function for estimating the position coordinates of the information terminal 40 based on the identification information of the information terminal 40 and the coordinate information of the position reference device 50 acquired via the receiver 20. .

The control unit 33 identifies the information terminal 40 based on the identification information of the information terminal 40 acquired from the information terminal 40 via the receiver 20 and the reference information acquired from the position reference device 50 via the receiver 20. Positional information within the facility 100 is acquired. Here, the control unit 33 obtains the distance from the information terminal 40 to the position reference device 50 based on the coordinate information of the position reference device 50 in the facility 100 and the RSSI1. The control unit 33 acquires, as the position information of the information terminal 40, an area within a circle centered on the coordinates of the position reference device 50 included in the coordinate information of the position reference device 50 and having the distance as the radius. The location information of the information terminal 40 is location information of the information terminal 40 in substantially real time. In other words, in the present embodiment, the position information of the information terminal 40 acquired by the position information acquisition process corresponds to the position information at the time when the acquisition unit 30 receives the signal from the receiver 20 . The control unit 33 may acquire the coordinates based on the coordinate information of the position reference device 50 as the position coordinates of the information terminal 40 .

The location information acquisition system 10 in the present disclosure includes a computer system. A computer system is mainly composed of a processor and a memory as hardware. The function of the position information acquisition system 10 in the present disclosure is realized by the processor executing a program recorded in the memory of the computer system. The program may be recorded in advance in the memory of the computer system, may be provided through an electric communication line, or may be recorded in a non-temporary recording medium such as a computer system-readable memory card, optical disk, or hard disk drive. may be provided. A processor in a computer system consists of one or more electronic circuits, including semiconductor integrated circuits (ICs) or large scale integrated circuits (LSIs). The integrated circuit such as IC or LSI referred to here is called differently depending on the degree of integration, and includes integrated circuits called system LSI, VLSI (Very Large Scale Integration), or ULSI (Ultra Large Scale Integration). In addition, a field-programmable gate array (FPGA) that is programmed after the LSI is manufactured, or a logic device capable of reconfiguring the bonding relationship inside the LSI or reconfiguring the circuit partitions inside the LSI may also be adopted as the processor. can be done. A plurality of electronic circuits may be integrated into one chip, or may be distributed over a plurality of chips. A plurality of chips may be integrated in one device, or may be distributed in a plurality of devices. A computer system, as used herein, includes a microcontroller having one or more processors and one or more memories. Accordingly, the microcontroller also consists of one or more electronic circuits including semiconductor integrated circuits or large scale integrated circuits.

In addition, it is not an essential configuration of the position information acquisition system 10 that a plurality of functions of the position information acquisition system 10 are integrated in one housing. may be provided dispersedly. Furthermore, at least part of the functions of the location information acquisition system 10 may be realized by a cloud (cloud computing) or the like.

(3) Operation An example of the operation of the position information acquisition system 10 will be described below with reference to FIG. Note that descriptions in parentheses in FIG. 3 indicate types of information contained in signals described before the parentheses. Here, "ID" in parentheses indicates identification information of information terminal 40, "coordinates" in parentheses indicates coordinate information of position reference device 50, and "RSSI1" in parentheses indicates information terminal 40. 4 shows a measured received signal strength measurement of a reference signal;

The position reference device 50 periodically transmits a reference signal including its own coordinate information (transmitting step).

When the user 1 carrying the information terminal 40 approaches the position reference device 50, the communication unit 41 of the information terminal 40 receives the reference signal transmitted (transmitted) from the position reference device 50, and responds to the reference signal. Get the coordinate information it contains. Also, the communication unit 41 of the information terminal 40 obtains the RSSI1 by measuring the received signal strength of the reference signal. The control unit 43 of the information terminal 40 that has acquired the coordinate information and the RSSI1 acquires the own identification information (ID) described in the storage unit 42, the coordinate information acquired by the communication unit 41, and the RSSI1. The radio signal containing the signal is transmitted from the communication unit 41 to the receiver 20 .

The receiver 20 transmits a signal including information contained in the radio signal received from the information terminal 40 to the acquisition unit 30 (transfer step). Here, the signal transmitted from the receiver 20 to the acquisition unit 30 includes identification information of the information terminal 40, coordinate information of the position reference device 50, and RSSI1.

The acquisition unit 30 receives the signal from the receiver 20 by the communication unit 31 (identification information acquisition step), and acquires the position information of the information terminal 40 by the control unit 33 (position information acquisition step). The control unit 33 may estimate the coordinates of the information terminal 40 within the facility 100 by performing positioning (here, one-point positioning) using the coordinate information of the position reference device 50 and the RSSI1.

(4) Effects The location information acquisition system 10 of this embodiment includes an acquisition unit 30, a receiver 20, and a location reference device 50. FIG. Acquisition unit 30 acquires identification information of information terminal 40 that transmits a radio signal including its own identification information. The receiver 20 is arranged at the facility 100 and transmits a signal including information contained in the received radio signal to the acquisition unit 30 . The position reference device 50 is arranged at a position where the information terminal 40 can be closer to the receiver 20 than the receiver 20 in the facility 100 and transmits a reference signal including coordinate information within the facility 100 itself. Based on the identification information acquired from the information terminal 40 via the receiver 20 and the reference signal acquired from the position reference device 50 via the receiver 20, the acquisition unit 30 acquires the information terminal 40 within the facility 100. Get the location information of .

As a result, the location information acquisition system 10 of the present embodiment can acquire the location information of the information terminal 40 with high accuracy.

Further, in the position information acquisition system 10 of the present embodiment, the radio signal received by the receiver 20 includes information on the measured value of received signal strength of the reference signal measured by the information terminal 40 .

As a result, in the location information acquisition system 10 of the present embodiment, the measured value of the received signal strength of the reference signal can be used to estimate the location information of the information terminal 40 within the facility 100 .

Further, in the position information acquisition system 10 of the present embodiment, the position reference device 50 is a charger capable of charging the information terminal 40 . Thereby, in the position information acquisition system 10 , the information terminal 40 can be charged by the position reference device 50 . The charger may be a charger that charges the information terminal 40 via a connector or the like, or may be a non-contact power supply type charger. The charger may be, for example, a charger supplied with power from a commercial power source or a charger using a battery as a power source.

Further, the location information acquisition method of this embodiment includes an identification information acquisition step, a transfer step, a transmission step, and a location information acquisition step. The identification information obtaining step is a step of obtaining, by the obtaining unit 30, the identification information of the information terminal 40 that transmits a radio signal including its own identification information. The transfer step is a step of transmitting a signal including information included in the radio signal received by the receiver 20 placed in the facility 100 to the acquisition unit 30 . The transmission step is a step of transmitting a reference signal including coordinate information of the position reference device 50 within the facility 100 from the position reference device 50 arranged at a position where the information terminal 40 can be closer to the receiver 20 than the receiver 20 in the facility 100 . be. In the position information obtaining step, based on the identification information obtained from the information terminal 40 via the receiver 20 and the reference signal obtained from the position reference device 50 via the receiver 20, the information terminal 40 within the facility 100 It is a step of acquiring position information at.

With the positional information acquisition method of this embodiment, it is possible to acquire the positional information of the information terminal 40 with high accuracy.

Further, the program of the present embodiment is a program for causing a computer system to execute identification information acquisition processing, transfer processing, transmission processing, and location information acquisition processing. The identification information acquisition process is a process of acquiring the identification information of the information terminal 40 that transmits a radio signal including its own identification information by the acquisition unit 30 . The transfer process is a process of transmitting a signal including information contained in a radio signal received by the receiver 20 placed in the facility 100 to the acquisition unit 30 . The transmission processing is processing for transmitting a reference signal including coordinate information of the position reference device 50 within the facility 100 from the position reference device 50 arranged at a position where the information terminal 40 can be closer than the receiver 20 in the facility 100 . be. In the position information acquisition process, based on the identification information acquired from the information terminal 40 via the receiver 20 and the reference signal acquired from the position reference device 50 via the receiver 20, the information terminal 40 within the facility 100 This is a process of acquiring position information in

With the program of the present embodiment, it is possible to acquire the position information of the information terminal 40 with high accuracy.

(Embodiment 2)
The location information acquisition system 10a according to the second embodiment will be described below with reference to FIGS. 4 and 5. FIG.

A positional information acquisition system 10a according to the second embodiment is substantially the same as the positional information acquisition system 10 according to the first embodiment, and is provided with a position reference device 50a instead of the position reference device 50 according to the first embodiment. It differs from the positional information acquisition system 10 . Regarding the location information acquisition system 10a according to the second embodiment, the same components as those of the location information acquisition system 10 according to the first embodiment are denoted by the same reference numerals, and descriptions thereof are omitted.

As shown in FIGS. 4 and 5, the position information acquisition system 10a of this embodiment includes an acquisition unit 30, a receiver 20, and a position reference device 50a. Acquisition unit 30 acquires the identification information of information terminal 40a that transmits a radio signal including its own identification information. The receiver 20 is arranged at the facility 100 and transmits a signal including information contained in the received radio signal to the acquisition unit 30 . The position reference device 50a is arranged at a position where the information terminal 40a can be closer to the receiver 20 than the receiver 20 in the facility 100, and transmits a reference signal including coordinate information within the facility 100 itself. Based on the identification information acquired from the information terminal 40a via the receiver 20 and the reference information acquired from the position reference device 50a via the receiver 20, the acquisition unit 30 detects the information terminal 40a within the facility 100. Get the location information of .

In this embodiment, the information terminal 40a is not a component of the positional information acquisition system 10a, but may be included in the positional information acquisition system 10a as a component of the positional information acquisition system 10a.

The information terminal 40a includes a communication unit 41a having a communication function for wireless communication using radio waves. The communication unit 41a has, as a communication function, a transmission function of transmitting (transmitting) a radio signal including its own identification information. As for the communication method of the communication unit 41a, wireless communication is performed by, for example, the Bluetooth (registered trademark) Low Energy communication method. The communication method of the communication unit 41a is not limited to Bluetooth (registered trademark) Low Energy, and may be, for example, Wi-Fi (registered trademark). The identification information is, for example, Bluetooth (registered trademark) Device Address. The radio signal transmitted from the information terminal 40a is a radio signal using radio waves. In the information terminal 40a, the identification information is stored in the storage section 42 of the information terminal 40a. The storage unit 42 is, for example, nonvolatile memory such as EEPROM. Although only one information terminal 40a is illustrated in FIGS. 4 and 5, the number of information terminals 40a is not limited to one, and may be plural. Here, the plurality of information terminals 40a have different identification information. When a plurality of users 1 use the facility 100, the plurality of users 1 carry individual information terminals 40a. In other words, the information terminal 40a and the user 1 are in one-to-one correspondence, and the identification information of the information terminal 40a is associated with the user 1. The identification information is different.

The information terminal 40a only needs to have at least a transmission function for transmitting radio signals as a communication function, and a terminal having a simpler configuration than the information terminal 40 described in the first embodiment can be adopted. The information terminal 40a wirelessly transmits, for example, a radio signal (beacon signal) called an advertisement packet at predetermined time intervals and with predetermined transmission power.

The position reference device 50a has a function of measuring the received signal strength, which is the signal strength of the received radio signal, when receiving the radio signal transmitted from the information terminal 40a.

The position reference device 50 a includes a communication section 51 , a storage section 52 and a control section 53 . In this embodiment, the communication unit 51 has not only a transmission function (origination function) but also a reception function.

The communication unit 51 transmits a radio signal composed of a reference signal including coordinate information within the own facility 100 of the position reference device 50a. In the position reference device 50a, the coordinate information of the position reference device 50a is stored in the storage unit 52, for example. The communication unit 51 periodically transmits a radio signal composed of a reference signal including, for example, coordinate information of the position reference device 50a. The communication unit 51 performs wireless communication using the same communication method as the information terminal 40a. The communication method of the communication unit 51 is not limited to Bluetooth (registered trademark) Low Energy, and may be a communication method such as Wi-Fi (registered trademark).

The control unit 53 is composed of, for example, a microcomputer having a processor and memory. That is, the control unit 53 is realized by a computer system having a processor and memory. The computer system functions as the control unit 53 by the processor executing appropriate programs. The program may be prerecorded in a memory, or may be provided by being recorded in a non-temporary recording medium such as a memory card or through an electric communication line such as the Internet. Although only one position reference device 50a is illustrated in FIGS. 4 and 5, the number of position reference devices 50a is not limited to one and may be plural.

The position reference device 50a transmits a reference signal including its own coordinate information to the receiver 20 upon receiving the radio signal from the information terminal 40a. Here, the reference signal includes information on the measured value (RSSI2) of the received signal strength of the radio signal from the information terminal 40a measured by the position reference device 50a.

Based on the identification information of the information terminal 40a acquired from the information terminal 40a through the receiver 20 and the reference information acquired from the position reference device 50a through the receiver 20, the control unit 33 of the acquisition unit 30 The positional information within the facility 100 of the information terminal 40a is acquired. Here, the control unit 33 obtains the distance from the position reference device 50a to the information terminal 40a based on the RSSI2. The control unit 33 acquires, as the position information of the information terminal 40a, an area within a circle centered on the coordinates of the position reference device 50a contained in the coordinate information of the position reference device 50a and having the distance as the radius. The control unit 33 may acquire the coordinates based on the coordinate information of the position reference device 50a as the position coordinates of the information terminal 40a.

An example of the operation of the position information acquisition system 10a will be described below with reference to FIG. Note that the description in parentheses in FIG. 5 indicates the type of information included in the signal described before the parentheses. Here, "ID" in parentheses indicates identification information of the information terminal 40a, "coordinates" in parentheses indicates coordinate information of the position reference device 50a, and "RSSI2" in parentheses indicates the position reference device 50a. shows the measured value of the received signal strength of the wireless signal from the information terminal 40a.

The information terminal 40a periodically transmits a radio signal including its own identification information (transmitting step).

When the user 1 carrying the information terminal 40a approaches the position reference device 50a, the communication unit 51 of the position reference device 50a receives a radio signal transmitted (transmitted) from the information terminal 40a. Also, the communication unit 51 of the position reference device 50a obtains RSSI2 by measuring the received signal strength of the radio signal from the information terminal 40a. After acquiring the identification information of the information terminal 40a and the RSSI2, the control unit 53 of the position reference device 50a uses the identification information (ID) of the information terminal 40a, its own coordinate information stored in the storage unit 52, and the RSSI2. and a radio signal including and are transmitted from the communication unit 51 to the receiver 20 .

The receiver 20 transmits a signal including information contained in the radio signal received from the position reference device 50a to the acquisition unit 30 (transfer step). Here, the signal transmitted from the receiver 20 to the acquisition unit 30 includes identification information of the information terminal 40a, coordinate information of the position reference device 50a, and RSSI2.

The acquisition unit 30 receives the signal from the receiver 20 by the communication unit 31 (identification information acquisition step), and acquires the location information of the information terminal 40a by the location information acquisition process in the control unit 33 (location information acquisition step ). After acquiring the position information of the information terminal 40a, the acquisition unit 30 may perform positioning based on the position information.

A position information acquisition system 10a of the present embodiment includes an acquisition unit 30, a receiver 20, and a position reference device 50a. Acquisition unit 30 acquires the identification information of information terminal 40a that transmits a radio signal including its own identification information. The receiver 20 is arranged at the facility 100 and transmits a signal including information contained in the received radio signal to the acquisition unit 30 . The position reference device 50a is arranged at a position where the information terminal 40a can be closer to the receiver 20 than the receiver 20 in the facility 100, and transmits a reference signal including coordinate information within the facility 100 itself. Based on the identification information acquired from the information terminal 40a via the receiver 20 and the reference information acquired from the position reference device 50a via the receiver 20, the acquisition unit 30 detects the information terminal 40a within the facility 100. Get the location information of .

As a result, the location information acquisition system 10a of the present embodiment can accurately acquire the location information of the information terminal 40a.

Further, in the positional information acquisition system 10a of the present embodiment, the position reference device 50a transmits the reference signal to the receiver 20 upon receiving the radio signal from the information terminal 40a. Accordingly, in the positional information acquisition system 10a of the present embodiment, the information terminal 40a may be a single-function information terminal that transmits radio signals, so the information terminal 40a has both a transmission function and a reception function. There is an advantage that it can be omitted.

In addition, in the positional information acquisition system 10a of the present embodiment, the reference signal includes information on the measured value of received signal strength of the radio signal from the information terminal 40a, which is measured by the positional reference device 50a. As a result, in the position information acquisition system 10a of the present embodiment, the measured value of the received signal strength of the radio signal from the information terminal 40a measured by the position reference device 50a is used as the position information of the information terminal 40a within the facility 100. can be used for estimating

Further, the location information acquisition method of this embodiment includes an identification information acquisition step, a transfer step, a transmission step, and a location information acquisition step. The identification information obtaining step is a step of obtaining, by the obtaining unit 30, the identification information of the information terminal 40a that transmits a radio signal including its own identification information. The transfer step is a step of transmitting a signal including information included in the radio signal received by the receiver 20 placed in the facility 100 to the acquisition unit 30 . The transmission step is a step of transmitting a reference signal including coordinate information of the position reference device 50a within the facility 100 from the position reference device 50a arranged at a position where the information terminal 40a can be closer than the receiver 20 in the facility 100. be. In the position information obtaining step, based on the identification information obtained from the information terminal 40a via the receiver 20 and the reference information obtained from the position reference device 50a via the receiver 20, the information terminal 40a within the facility 100 It is a step of acquiring position information at.

With the position information acquisition method of the present embodiment, it is possible to acquire the position information of the information terminal 40a with high accuracy.

Further, the program of the present embodiment is a program for causing a computer system to execute identification information acquisition processing, transfer processing, transmission processing, and location information acquisition processing. The identification information acquisition process is a process of acquiring the identification information of the information terminal 40a that transmits a radio signal including its own identification information. The transfer process is a process of receiving a radio signal including location information by the receiver 20 placed in the facility 100 and transmitting the signal including the location information to the acquisition unit 30 . The transmission process is a process of transmitting a radio signal related to the positional information of the information terminal 40a from the position reference device 50a arranged at a position where the information terminal 40a can be closer than the receiver 20 in the facility 100. FIG. In the position information acquisition process, based on the identification information acquired from the information terminal 40a via the receiver 20 and the reference information acquired from the position reference device 50a via the receiver 20, the information terminal 40a within the facility 100 This is a process of acquiring position information in

With the program of the present embodiment, it is possible to acquire the position information of the information terminal 40a with high accuracy.

(Embodiment 3)
The location information acquisition system 10b according to the third embodiment will be described below with reference to FIGS.

The location information acquisition system 10b according to the third embodiment is substantially the same as the location information acquisition system 10 according to the first embodiment, and is different from the first embodiment in that it includes a plurality of (three in the illustrated example) receivers 20. It is different from the location information acquisition system 10 concerned. Regarding the position information acquisition system 10b according to the third embodiment, the same components as those of the position information acquisition system 10 according to the first embodiment are denoted by the same reference numerals, and descriptions thereof are omitted.

A location information acquisition system 10b of the present embodiment includes an acquisition unit 30b instead of the acquisition unit 30 of the location information acquisition system 10 of the first embodiment.

The signal transmitted from each of the plurality of receivers 20 to the acquisition unit 30b includes information on the measured value of received signal strength of the radio signal transmitted from the information terminal 40. FIG. The storage unit 32 of the acquisition unit 30b stores the coordinate information of each of the plurality of receivers 20 in association with the receiver ID of each of the plurality of receivers 20 . The acquisition unit 30b further uses the measured value of the received signal strength measured by each of the plurality of receivers 20 and the coordinate information of each of the plurality of receivers 20 to obtain positional information of the information terminal 40 within the facility 100. presume. Hereinafter, for convenience of explanation, the three receivers 20 may also be referred to as the receiver 20A, the receiver 20B, and the receiver 20C in order to distinguish between the multiple (three) receivers 20 . However, the three receivers 20A, 20B and 20C are not collinear.

An example of the operation of the position information acquisition system 10b will be described below with reference to FIG. The description in parentheses in FIG. 8 indicates the type of information included in the signal described before the parentheses. Here, "ID" in parentheses indicates identification information of information terminal 40, "coordinates" in parentheses indicates coordinate information of position reference device 50, and "RSSI3" in parentheses indicates information terminal 40. 4 shows a measured received signal strength measurement of a reference signal; Also, "RSSI4A", "RSSI4B" and "RSSI4C" in parentheses indicate the measured values of the received signal strength of the radio signal from the information terminal 40 measured by the receivers 20A, 20B and 20C, respectively.

The position reference device 50 periodically transmits a reference signal including its own coordinate information (transmitting step).

When the user 1 carrying the information terminal 40 approaches the position reference device 50, the communication unit 41 of the information terminal 40 receives the reference signal transmitted (transmitted) from the position reference device 50, and responds to the reference signal. Get the coordinate information it contains. Also, the communication unit 41 of the information terminal 40 obtains RSSI3 by measuring the received signal strength of the reference signal. The control unit 43 of the information terminal 40 that has acquired the coordinate information and the RSSI3 acquires its own identification information (ID) written in the storage unit 42, the coordinate information acquired by the communication unit 41, and the RSSI3. The radio signal containing the radio signal is transmitted from the communication unit 41 to the plurality of receivers 20 .

Each of the plurality of receivers 20 transmits a signal including information included in the radio signal received from the information terminal 40 to the acquisition unit 30b (transfer step). Here, the signal transmitted from the receiver 20A to the acquisition unit 30b includes the identification information of the information terminal 40, the coordinate information of the position reference device 50, RSSI3, RSSI4A, and the receiver ID of the receiver 20A. . A signal transmitted from the receiver 20B to the acquisition unit 30b includes identification information of the information terminal 40, coordinate information of the position reference device 50, RSSI3, RSSI4B, and the receiver ID of the receiver 20B. A signal transmitted from the receiver 20C to the acquisition unit 30b includes identification information of the information terminal 40, coordinate information of the position reference device 50, RSSI3, RSSI4C, and the receiver ID of the receiver 20C.

The acquisition unit 30b receives signals from each of the plurality of receivers 20 by the communication unit 31 (identification information acquisition step), and acquires the position information of the information terminal 40 by the control unit 33b (position information acquisition step). The control unit 33 b acquires at least the coordinate information of the position reference device 50 as the position information of the information terminal 40 . The control unit 33 b has a function of estimating the coordinates of the information terminal 40 within the facility 100 . Here, the control unit 33b uses the coordinate information of the position reference device 50 and the RSSI3 to estimate the area in the facility 100 where the information terminal 40 is located. Further, the control unit 33b performs three-point positioning using coordinate information of the three receivers 20A, 20B and 20C and RSSI4A, RSSI4B and RSSI4C measured by the three receivers 20A, 20B and 20C respectively. , the azimuth in which the information terminal 40 is located with respect to the coordinates based on the coordinate information of the position reference device 50 is estimated.

In the position information acquisition system 10c of the present embodiment, when estimating the coordinates of the information terminal 40, information related to the three receivers 20 (coordinate information of each of the three receivers 20, RSSI4A, RSSI4B and RSSI4C) is used. Since the three-point positioning is performed by using the three-point positioning, it is possible to estimate the coordinates of the information terminal 40 with higher accuracy. Positioning for estimating the coordinates of the information terminal 40 is not limited to three-point positioning, and may be, for example, two-point positioning or four-point positioning.

In the position information acquisition system 10b of the present embodiment, the signals transmitted from each of the plurality of receivers 20 to the acquisition unit 30b are the measured values of the received signal strength of the radio signal transmitted from the information terminal 40 (RSSI4A, RSSI4B, RSSSI4C ) information. The acquisition unit 30b further uses the measured values (RSSI4A, RSSI4B, RSSSI4C) of the signal reception strength measured in each of the plurality of receivers 20 and the coordinate information of each of the plurality of receivers 20 to obtain the facility of the information terminal 40. Coordinates, which are location information within 100, are estimated. As a result, the location information acquisition system 10b of the present embodiment can acquire the location information of the information terminal 40 with higher accuracy.

(Embodiment 4)
A location information acquisition system 10c according to the fourth embodiment will be described below with reference to FIGS. 9 and 10. FIG.

The location information acquisition system 10c according to the fourth embodiment is substantially the same as the location information acquisition system 10a according to the second embodiment, and is different from the second embodiment in that it includes a plurality of (three in the illustrated example) receivers 20. It is different from the location information acquisition system 10a. Regarding the position information acquisition system 10c according to the fourth embodiment, the same components as those of the position information acquisition system 10a according to the second embodiment are denoted by the same reference numerals, and descriptions thereof are omitted.

A location information acquisition system 10c of the present embodiment includes an acquisition unit 30c instead of the acquisition unit 30 of the location information acquisition system 10a of the second embodiment.

The signal transmitted from each of the plurality of receivers 20 to the acquisition unit 30c includes information on the measured value of received signal strength of the radio signal transmitted from the information terminal 40a. The storage unit 32 of the acquisition unit 30c stores the coordinate information of each of the plurality of receivers 20 in association with the receiver ID of each of the plurality of receivers 20 . The acquisition unit 30c further uses the measured value of the received signal strength measured by each of the plurality of receivers 20 and the coordinate information of each of the plurality of receivers 20 to obtain positional information of the information terminal 40a within the facility 100. presume. Hereinafter, for convenience of explanation, the three receivers 20 may also be referred to as the receiver 20A, the receiver 20B, and the receiver 20C in order to distinguish between the multiple (three) receivers 20 . However, the three receivers 20A, 20B and 20C are not collinear.

An example of the operation of the position information acquisition system 10c will be described below with reference to FIG. Note that the description in parentheses in FIG. 10 indicates the type of information included in the signal described before the parentheses. Here, "ID" in parentheses indicates identification information of the information terminal 40a, "coordinates" in parentheses indicates coordinate information of the position reference device 50a, and "RSSI5" in parentheses indicates the position reference device 50a. shows the measured value of the received signal strength of the wireless signal from the information terminal 40a. Also, "RSSI6A", "RSSI6B" and "RSSI6C" in parentheses indicate the measured values of the received signal strength of the radio signal from the position reference device 50a measured by the receivers 20A, 20B and 20C, respectively.

The information terminal 40a periodically transmits a radio signal including its own identification information (transmitting step).

When the user 1 carrying the information terminal 40a approaches the position reference device 50a, the communication unit 51 of the position reference device 50a receives a radio signal transmitted (transmitted) from the information terminal 40a. Also, the communication unit 51a of the position reference device 50a obtains RSSI5 by measuring the received signal strength of the radio signal from the information terminal 40a. After acquiring the identification information of the information terminal 40a and the RSSI5, the control unit 53 of the position reference device 50a uses the identification information (ID) of the information terminal 40a, its own coordinate information stored in the storage unit 52, and the RSSI5. and a radio signal including and are transmitted from the communication unit 51 to the plurality of receivers 20 .

Each of the plurality of receivers 20 transmits a signal including information contained in the radio signal received from the position reference device 50a to the acquisition unit 30c (transfer step). Here, the signal transmitted from the receiver 20A to the acquisition unit 30c includes identification information of the information terminal 40a, coordinate information of the position reference device 50a, RSSI5, RSSI6A, and the receiver ID of the receiver 20A. . A signal transmitted from the receiver 20B to the acquisition unit 30b includes identification information of the information terminal 40a, coordinate information of the position reference device 50, RSSI5, RSSI6B, and the receiver ID of the receiver 20B. A signal transmitted from the receiver 20C to the acquisition unit 30b includes identification information of the information terminal 40a, coordinate information of the position reference device 50, RSSI5, RSSI6C, and the receiver ID of the receiver 20C.

The acquisition unit 30c receives signals from each of the plurality of receivers 20 by the communication unit 31 (identification information acquisition step), and acquires the position information of the information terminal 40a by the control unit 33c (position information acquisition step). The control unit 33c acquires at least the coordinate information of the position reference device 50a as the position information of the information terminal 40a. The control unit 33 c has a function of estimating the coordinates of the information terminal 40 a within the facility 100 . Here, the control unit 33c estimates the area in the facility 100 where the information terminal 40a exists, using the coordinate information of the position reference device 50a and the RSSI5. Further, the control unit 33c performs three-point positioning using coordinate information of the three receivers 20A, 20B and 20C and RSSI6A, RSSI6B and RSSI6C measured by the three receivers 20A, 20B and 20C respectively. , the azimuth in which the information terminal 40a is located is estimated with respect to the coordinates based on the coordinate information of the position reference device 50a.

In the position information acquisition system 10c of the present embodiment, when estimating the coordinates of the information terminal 40a, information related to the three receivers 20 (coordinate information of each of the three receivers 20, RSSI6A, RSSI6B and RSSI6C) is used. Since the three-point positioning is performed by using the three-point positioning, it is possible to estimate the coordinates of the information terminal 40a with higher accuracy. Positioning for estimating the coordinates of the information terminal 40a is not limited to 3-point positioning, and may be, for example, 2-point positioning or 4-point positioning.

In the position information acquisition system 10c of this embodiment, the signal transmitted from each of the plurality of receivers 20 to the acquisition unit 30c includes information on the measured value of the received signal strength of the reference signal. The acquisition unit 30c further uses the measured value of the received signal strength of the reference signal to estimate the coordinates, which are the positional information within the facility 100 of the information terminal 40a. As a result, the location information acquisition system 10c of the present embodiment can acquire the location information of the information terminal 40a with higher accuracy.

(Embodiment 5)
Since the basic configuration of the position information acquisition system 10 of this embodiment is the same as that of the position information acquisition system 10 of the first embodiment shown in FIGS.

In the position information acquisition system 10 of this embodiment, the information terminal 40 periodically transmits a radio signal including identification information. The reference signal emitted by the position reference device 50 includes the measured value (RSSI7) of the received signal strength value of the radio signal sent from the information terminal 40, the identification information of the information terminal 40, and the coordinate information of the position reference device 50. ,including. Information terminal 40 is included in the reference signal when the identification information included in the reference signal matches its own identification information and the measured value (RSSI7) of the received signal strength included in the reference signal is equal to or greater than a predetermined value. Coordinate information is used as self position information. As a result, the location information acquisition system 10 of this embodiment can provide the information terminal 40 with the location information of the information terminal 40 in the facility 100 .

In the positional information acquisition system 10 of the present embodiment, the control unit 43 of the information terminal 40 detects that the identification information included in the reference signal received by the communication unit 41 matches its own identification information and that the received reference signal is included in the reference signal. If the measured value of the signal strength is equal to or greater than the predetermined value, the coordinate information included in the reference signal is used as the self position information. In the location information acquisition system 10 of the present embodiment, if the information terminal 40 has a display unit, the control unit 43 of the information terminal 40 may display the location information of the information terminal 40 on the display unit. As a result, the user 1 carrying the information terminal 40 can visually recognize the positional information of the information terminal 40 in the facility 100 through the display on the display unit. In this case, a “user” is a person permitted to access the location information acquisition system 10 applied to the facility 100 . The display unit includes a touch panel including a display device such as a liquid crystal display or an organic EL (Electro Luminescence) display and a touch pad, and functions as a user interface (GUI: Graphic User Interface). That is, the information terminal 40 outputs information to the display device and receives information input from the touch pad. Various screens are displayed on the display unit as needed.

When the information terminal 40 displays the position information of the information terminal 40 on the display unit, the facility information downloaded from the server that stores the facility information includes a notation indicating the position of the information terminal 40 (for example, a circle, a star, a dot, etc.). etc.) may be superimposed and displayed. In this case, the communication unit 41 can be connected to a network such as the Internet, and has a communication function of wirelessly communicating with a server storing facility information through the network. The facility information is, for example, part or all of three-dimensional data representing the structure of the facility 100 . Three-dimensional data is data representing the facility 100 in a virtual space constructed using a computer. This kind of three-dimensional data is, for example, BIM (Building Information Modeling). Below, three-dimensional data is called "BIM data."

BIM data includes not only data representing the shape and dimensions of the facility 100, but also various types of data related to the facility 100, such as data related to the members that make up the facility 100 and data related to equipment installed in the facility 100. are integrated. The BIM data also includes information on the latitude and longitude of the reference position of the facility 100 and information on the orientation of the facility 100 . In other words, the BIM data represents not only the data for building the facility 100 but also various data related to the facility 100 . BIM data is information expressed using, for example, a three-dimensional CAD (Computer Aided Design) system, and is created using data representing the shape and dimensions of the facility 100 . By using BIM data, for example, it is possible to display a graphic representing the whole or part of the facility 100 on the display. BIM data is hierarchized according to the facility 100 . BIM data includes, for example, information representing the entire facility 100 in a front view or a perspective view, information representing each of a plurality of floors of the facility 100 in a plan view or a perspective view, or information representing one floor in a plan view or a perspective view. contains. For example, BIM data includes data representing a perspective view of an entire building that is the facility 100, data representing a plan view of one floor in the building, or data representing a perspective view of a room viewed from the inside. Both facility information (BIM data) and location information can be displayed using software capable of executing a program written in a programming language such as Java (registered trademark). For example, a web browser compatible with WebGL (Web Graphics Library) can display three-dimensional data of the facility 100 on the display unit.

(Modification)
Embodiments 1-5 described above are but one of various embodiments of the present disclosure. The first to fifth embodiments described above can be modified in various ways according to design and the like, as long as the object of the present disclosure can be achieved.

For example, the acquisition units 30, 30b, and 30c are realized by a server, but the configuration is not limited to this, and at least one function of the acquisition units 30, 30b, and 30c is distributed over two or more systems. may be provided. The acquisition units 30, 30b, and 30c may be implemented by, for example, the cloud (cloud computing).

Also, the number of receivers 20 is not particularly limited. Also, the numbers of the position reference devices 50 and the number of the position reference devices 50a are not particularly limited.

(summary)
The following aspects are disclosed from Embodiments 1 to 5 and the like described above.

A location information acquisition system (10; 10a; 10b; 10c) according to a first aspect includes an acquisition unit (30; 30b; 30c), a receiver (20), and a location reference device (50; 50a). Prepare. An acquisition unit (30) acquires identification information of an information terminal (40; 40a) that transmits a radio signal including its own identification information. A receiver (20) is located at a facility (100) and transmits a signal containing information contained in the received radio signal to an acquisition unit (30; 30b; 30c). The position reference device (50; 50a) is placed at a position where the information terminal (40; 40a) can be closer to the receiver (20) than the receiver (20) in the facility (100), and obtains the coordinate information within the facility (100). emits a reference signal containing Acquisition unit (30; 30b; 30c) acquires identification information acquired from information terminal (40; 40a) via receiver (20) and position reference device (50; 50a) via receiver (20) Positional information of the information terminal (40; 40a) within the facility (100) is acquired based on the acquired reference signal.

In the location information acquisition system (10; 10a; 10b; 10c) according to the first aspect, it is possible to acquire the location information of the information terminal (40; 40a) with high accuracy.

In the position information acquisition system (10; 10b) according to the second aspect, in the first aspect, the radio signal received by the receiver (20) is the received signal of the reference signal measured by the information terminal (40) Contains information on strength measurements (RSSI1; RSSI3).

In the location information acquisition system (10; 10b) according to the second aspect, the measured value (RSSI1; RSSI3) of the received signal strength of the reference signal is used to estimate the location information of the information terminal (40) within the facility (100). can be used for

In the position information acquisition system (10a) according to the third aspect, in the first aspect, when the position reference device (50a) receives the radio signal from the information terminal (40a), the reference signal is sent to the receiver (20). Send to

In the position information acquisition system (10a) according to the third aspect, the information terminal (40a) may be a single-function information terminal that transmits radio signals. There is an advantage that it is not necessary to have both.

In the position information acquisition system (10a) according to the fourth aspect, in the third aspect, the reference signal is the received signal strength of the radio signal from the information terminal (40a) measured by the position reference device (50a). It contains the information of the measured value (RSSI2).

In the position information acquisition system (10a) according to the fourth aspect, the measured value (RSSI2) of the received signal strength of the radio signal from the information terminal (40a) measured by the position reference device (50a) is 40a) can be used for estimating location information within the facility (100).

A location information acquisition system (10b) according to a fifth aspect includes a plurality of receivers (20) in the second aspect. The signal transmitted from each of the plurality of receivers (20) to the acquisition unit (30b) includes information on the measured values (RSSI4A, RSSI4B, RSSI4C) of the received signal strength of the radio signal transmitted from the information terminal (40). . An acquisition unit (30b) stores coordinate information of each of the plurality of receivers (20). An acquisition unit (30b) further uses measurement values (RSSI4A, RSSI4B, RSSI4C) of signal reception strengths measured in each of the plurality of receivers (20) and coordinate information of each of the plurality of receivers (20) , to estimate the location information of the information terminal (40) within the facility (100).

In the positional information acquisition system (10b) according to the fifth aspect, it is possible to acquire the positional information of the information terminal (40) with higher accuracy.

A position information acquisition system (10c) according to the sixth aspect comprises a plurality of receivers (20) in the fourth aspect. A signal transmitted from each of the plurality of receivers (20) to the acquisition unit (30c) includes information on the measured values (RSSI6A, RSSI6B, RSSSI6C) of the received signal strength of the reference signal. An acquisition unit (30c) stores coordinate information of each of the plurality of receivers (20). An acquisition unit (30c) further uses the measured values (RSSI6A, RSSI6B, RSSSI6C) of the received signal strength measured in each of the plurality of receivers (20) and the coordinate information of each of the plurality of receivers (20) , the position information of the information terminal (40a) within the facility (100) is estimated.

In the position information acquisition system (10c) according to the sixth aspect, it is possible to acquire the position information of the information terminal (40a) with higher accuracy.

In the position information acquisition system (10) according to the seventh aspect, in the third or fourth aspect, the information terminal (40a) periodically transmits a radio signal containing identification information. The reference signal includes the measured value (RSSI7) of the signal reception strength of the radio signal transmitted from the information terminal (40a), the identification information of the information terminal (40a), and the coordinate information. When the identification information included in the reference signal matches its own identification information and the measured value (RSSI7) of the signal reception strength included in the reference signal is equal to or greater than a predetermined value, the information terminal (40a) accepts the reference signal. The included coordinate information is used as self position information.

The location information acquisition system (10) according to the seventh aspect can provide location information of the information terminal (40) in the facility (100) to the information terminal (40).

In the position information acquisition system (10; 10a; 10b; 10c) according to the eighth aspect, in any one of the first to seventh aspects, the position reference device (50; 50a) comprises the information terminal (40; 40a ) can be charged.

In the position information acquisition system (10; 10a; 10b; 10c) according to the eighth aspect, the information terminal (40; 40a) can be charged by the position reference device (50; 50a).

In the location information acquisition system (10; 10a; 10b; 10c) according to the ninth aspect, in any one of the first to eighth aspects, the acquisition unit (30; 30b; 30c) is a server.

The configurations according to the second to ninth aspects are not essential configurations for the position information acquisition system (10), and can be omitted as appropriate.

A location information acquisition method according to a tenth aspect includes an identification information acquisition step, a transfer step, a transmission step, and a location information acquisition step. The identification information acquisition step is a step of acquiring identification information of an information terminal (40; 40a) that transmits a radio signal including its own identification information by an acquisition unit (30; 30b; 30c). The transferring step is a step of sending a signal containing information contained in the radio signal received by the receiver (20) located in the facility (100) to the acquisition unit (30; 30b; 30c). In the transmission step, a position reference device (50; 50a) placed at a position where the information terminal (40; 40a) can be closer than the receiver (20) in the facility (100) to a position reference in the facility (100) transmitting a reference signal containing coordinate information of the device (50; 50a). The position information obtaining step includes identification information obtained from the information terminal (40; 40a) via the receiver (20) and a reference signal obtained from the position reference device (50; 50a) via the receiver (20). is a step of acquiring location information of the information terminal (40; 40a) within the facility (100) based on .

In the positional information acquisition method according to the tenth aspect, it is possible to acquire the positional information of the information terminal (40; 40a) with high accuracy.

A program according to an eleventh aspect is a program for causing a computer system to execute identification information acquisition processing, transfer processing, transmission processing, and location information acquisition processing. The identification information acquisition process is a process of acquiring the identification information of the information terminal (40; 40a) that transmits a radio signal including its own identification information by the acquisition unit (30; 30b; 30c). The transfer process is a process of transmitting a signal including information contained in the radio signal received by the receiver (20) located in the facility (100) to the acquisition unit (30; 30b; 30c). In the transmission process, the information terminal (40; 40a) is placed in a position where the information terminal (40; 40a) can approach the receiver (20) in the facility (100). This is a process of transmitting a reference signal containing coordinate information of the device (50; 50a). In the position information acquisition process, identification information acquired from the information terminal (40; 40a) through the receiver (20) and a reference signal acquired from the position reference device (50; 50a) through the receiver (20). , to acquire the positional information of the information terminal (40; 40a) within the facility (100).

With the program according to the eleventh aspect, it is possible to accurately acquire the position information of the information terminal (40; 40a).

10, 10a, 10b, 10c position information acquisition system 20 receiver 30, 30b, 30c acquisition unit 40, 40a information terminal 50, 50a position reference device 100 facility

Claims (4)

an acquisition unit for acquiring the identification information of an information terminal that transmits a radio signal containing the identification information of itself;
a receiver located at a facility that transmits a signal containing information contained in the received radio signal to the acquisition unit;
a position reference device disposed in the facility at a position where the information terminal can be closer than the receiver, and transmitting a reference signal including coordinate information within the facility;
The acquisition unit acquires the facility of the information terminal based on the identification information acquired from the information terminal through the receiver and the reference signal acquired from the position reference device through the receiver. Get location information in
The radio signal received by the receiver includes information on the measured value of the received signal strength of the reference signal measured by the information terminal,
comprising a plurality of the receivers,
a signal transmitted from each of the plurality of receivers to the acquisition unit includes information on a measured value of received signal strength of a radio signal transmitted from the information terminal;
The acquisition unit stores coordinate information of each of the plurality of receivers,
The acquisition unit further uses the measured values of the received signal strength of the radio signal transmitted from the information terminal and the coordinate information of each of the plurality of receivers, which are measured in each of the plurality of receivers, to obtain the estimating the location information of the information terminal within the facility;
Location acquisition system. an acquisition unit for acquiring the identification information of an information terminal that transmits a radio signal containing the identification information of itself;
a receiver located at a facility that transmits a signal containing information contained in the received radio signal to the acquisition unit;
a position reference device disposed in the facility at a position where the information terminal can be closer than the receiver, and transmitting a reference signal including coordinate information within the facility;
The acquisition unit acquires the facility of the information terminal based on the identification information acquired from the information terminal through the receiver and the reference signal acquired from the position reference device through the receiver. Get location information in
When the position reference device receives a radio signal from the information terminal, it transmits the reference signal to the receiver,
The reference signal includes information on the measured value of received signal strength of the radio signal from the information terminal, measured by the position reference device,
comprising a plurality of the receivers,
A signal transmitted from each of the plurality of receivers to the acquisition unit includes information on a measured value of received signal strength of the reference signal,
The acquisition unit stores coordinate information of each of the plurality of receivers,
The acquisition unit further uses the measured value of the received signal strength of the reference signal measured by each of the plurality of receivers and the coordinate information of each of the plurality of receivers to obtain, within the facility of the information terminal, Estimate the location of
Location acquisition system. The position reference device is a charger capable of charging the information terminal,
The location information acquisition system according to claim 1 or 2. The acquisition unit is a server,
The location information acquisition system according to any one of claims 1 to 3.

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