Source specification device and source specification system

Abstract

To provide a source specification device and a source specification system that can monitor a specific target.SOLUTION: A source specification device according to the present invention has: an antenna; an estimation unit that estimates the direction of arrival of a radio wave and the distance between the antenna and a source on the basis of the radio wave received by the antenna; an acquisition unit that acquires the feature quantity of the radio wave received by the antenna; a specification unit that specifies individual information of the source according to the feature quantity; and a control unit that displays, on a display, positional information of the source according to the direction of arrival of the radio wave and the distance, and the individual information of the source.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a source identification device and a source identification system. [Background technology]

[0002] Various crime prevention measures have been adopted in the past. For example, Patent Document 1 discloses a crime prevention device that emits microwaves, analyzes the reflected microwaves to detect the presence or absence of a human body, and issues an alarm when a human body is detected, as a method for detecting a suspicious person. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-206279 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the security device described in Patent Document 1, the detection means issues an alarm regardless of the object of detection, so it is not possible to monitor a specific object.

[0005] An object of the present invention is to provide a source identification device and a source identification system that can monitor a specific target. [Means for solving the problem]

[0006] The source identification device of the present invention is characterized by having an antenna, an estimation unit that estimates the direction of arrival of radio waves and the distance between the antenna and the source based on the radio waves received by the antenna, an acquisition unit that acquires characteristics of the radio waves received by the antenna, an identification unit that identifies individual information of the source based on the characteristics, and a control unit that displays, on a display unit, location information of the source based on the direction of arrival and distance of the radio waves and the individual information of the source.

[0007] Furthermore, it is preferable that the source identification device according to the present invention further comprises a registration unit that registers the source having the individual information identified by the identification unit as a monitoring target.

[0008] Furthermore, it is preferable that the source identification device according to the present invention further comprises an alarm signal output unit that outputs an alarm signal when a monitored object registered by the registration unit is located within a predetermined area.

[0009] Furthermore, in the source identification device of the present invention, it is preferable that the control unit stores status information under normal conditions based on the location information of the multiple sources registered by the registration unit, and acquires status information under measurement based on the location information of the multiple sources acquired when measuring the source again, and the alarm signal output unit outputs an alarm signal if the status information under normal conditions differs from the status information under measurement.

[0010] Furthermore, in the source identification device according to the present invention, it is preferable that the registration unit registers identification information acquired from the source based on a short-range wireless communication standard as information for identifying the monitoring target.

[0011] Furthermore, in the source identification device according to the present invention, it is preferable that the registration unit is capable of registering a plurality of sources as one group, and the alarm signal output unit outputs an alarm signal based on the center of gravity position of the plurality of sources.

[0012] The source identification system of the present invention is a source identification system comprising a measurement terminal and a server, wherein the measurement terminal has an antenna, an estimation unit that estimates the direction of arrival of radio waves and the distance between the antenna and the source of the radio waves based on the radio waves received by the antenna, an acquisition unit that acquires characteristics of the radio waves received by the antenna, and a terminal transmission unit that transmits the characteristics to a server, the server has an identification unit that identifies individual information of the source of the radio waves according to the characteristics, and a server transmission unit that transmits the individual information to the measurement terminal, and the measurement terminal further has a display unit and a control unit that displays location information of the source of the radio waves according to the direction of arrival and distance and the individual information of the source on the display unit. [Effects of the Invention]

[0013] According to the present invention, it is possible to provide a source identification device and a source identification system that can monitor a specific target. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a diagram illustrating a schematic configuration of a source identification device. [Figure 2] FIG. 1 is an exemplary functional block diagram of a source identification system. [Figure 3] FIG. 4 is a diagram illustrating an example of a data structure of monitoring target information. [Figure 4] FIG. 10 is a sequence diagram showing an example of the operation of the source identification system. [Figure 5] FIG. 10 is a flow chart showing an example of individual information identification processing. [Figure 6] FIG. 10 is an exemplary functional block diagram of a source identification device according to a first modification. [Figure 7] FIG. 10A is a diagram showing an example of status information of a monitoring map in a normal state, and FIG. 10B is a diagram showing an example of status information of a monitoring map during measurement. [Figure 8] FIG. 10 is a flowchart showing an example of the operation of the source identification system according to another usage method 1 of the first embodiment. [Figure 9] FIG. 1 is a diagram showing an outline of the center of gravity of a plurality of emission sources. DETAILED DESCRIPTION OF THE INVENTION

[0015] The following describes a call source identification device and a call source identification system according to the present invention with reference to the drawings. However, please note that the technical scope of the present invention is not limited to the embodiments, but extends to the inventions set forth in the claims and their equivalents.

[0016] (Embodiment 1) FIG. 1 is a diagram showing the schematic configuration of a communication source identification system 1. In recent years, it has become common for people to carry mobile communication terminals, which emit radio waves for communication. In other words, the mobile communication terminal is a source of radio waves. Therefore, the communication source identification system 1 identifies individual information about the communication source based on the radio waves of the communication source, and visualizes the movement status, etc. of the identified communication source, thereby making it possible to monitor the behavior of a person carrying the identified communication source.

[0017] In one example, when a suspicious person Y carrying a source X approaches a house 6, the source identification system 1 identifies the individual information of the source X based on the radio waves from the source X, and displays the location information and individual information P of the source X on the display unit 34 of the measurement terminal 3. The source identification system 1 also registers the source X as a target for monitoring, and outputs an alarm signal when the source X is located inside the house 6.

[0018] 2 is an exemplary functional block diagram of the source identification system 1. The source identification system 1 includes a measurement terminal 3, a server 4, and a monitoring terminal 5. The measurement terminal 3, the server 4, and the monitoring terminal 5 communicate with each other via a network N, which may be the Internet or an intranet. Note that the source identification system 1 does not necessarily have to include the monitoring terminal 5.

[0019] The measurement terminal 3 is, for example, a smartphone, a mobile phone, a tablet information terminal, a tablet personal computer, an e-book reader, or a wearable device. The measurement terminal 3 includes a terminal communication unit 31, a terminal storage unit 32, an operation unit 33, a display unit 34, and a terminal processing unit 35. These components are connected via a bus 36.

[0020] The terminal communication unit 31 is configured to enable the measurement terminal 3 to communicate with the server 4 and the monitoring terminal 5, and includes a communication interface circuit. The communication interface circuit included in the terminal communication unit 31 is a communication interface circuit for wireless LAN, mobile communication, etc. The terminal communication unit 31 receives data from the server 4 and supplies it to the device processing unit 35, and also transmits data supplied from the device processing unit 35 to the server 4. The terminal communication unit 31 may send and receive data to and from the monitoring terminal 5.

[0021] The terminal communication unit 31 includes a terminal receiving unit 311 and a terminal transmitting unit 312. The terminal receiving unit 311 includes an antenna and receives radio waves from a transmission source. The terminal transmitting unit 312 transmits the feature acquired by the acquisition unit 352 to the server 4 as feature data.

[0022] The terminal receiving unit 311 includes, but is not limited to, an array antenna as an example. Targets of radio waves received by the terminal receiving unit 311 include, for example, radio waves transmitted from a transmission source to a mobile communication base station and radio waves transmitted by the transmission source to search for a mobile communication base station. The terminal receiving unit 311 may acquire radio waves from a transmission source conforming to a short-range wireless communication standard such as Bluetooth (registered trademark) or NFC (Near Field Communication).

[0023] The terminal storage unit 32 is configured to store programs and data, and in one example includes a semiconductor memory. The terminal storage unit 32 stores, as programs, operating system programs, driver programs, application programs, and the like used in processing by the device processing unit 35. In one example, the programs are installed into the terminal storage unit 32 from a computer-readable, non-transitory, portable storage medium such as a CD-ROM or DVD-ROM. The programs may also be stored in a storage medium owned by a predetermined server and installed via a network. The terminal storage unit 32 stores location information of the transmission source according to the direction of arrival of the radio waves from the transmission source and the distance between the measurement terminal 3 (terminal receiving unit 311) and the transmission source, and feature data, which is data on the feature values ​​of the radio waves from the transmission source received by the terminal receiving unit 311.

[0024] The operation unit 33 is configured to receive user operations on the measurement terminal 3. The operation unit 33 generates an operation signal in response to the operation of the user of the measurement terminal 3, and supplies the operation signal to the device processing unit .

[0025] The display unit 34 is configured to display an image, and includes a display such as a liquid crystal display or an organic EL display. The display unit 34 may also function as a touch panel, thereby functioning as the operation unit 33.

[0026] The display unit 34 displays an image based on the image data supplied from the device processing unit 35. In one example, the display unit 34 displays location information of the source and individual information of the source based on the image data supplied from the device processing unit 35. The individual information is, for example, an International Mobile Equipment Identifier (IMEI) or an International Mobile Subscriber Identity (IMSI). When displaying the individual information, the display unit 34 may also display an identification ID, which is a number that identifies the individual information.

[0027] The device processing unit 35, which functions as a control unit, is a device that comprehensively controls the operation of the measurement terminal 3, and includes one or more processors and their peripheral circuits. The device processing unit 35 includes a CPU, for example. The device processing unit 35 may also include a DSP, an LSI, an ASIC, an FPGA, etc. The device processing unit 35 controls the operation of each component and executes various processes so that the various processes of the measurement terminal 3 are executed in an appropriate order based on the programs stored in the terminal storage unit 32.

[0028] The device processing unit 35 includes, as functional blocks, an estimation unit 351 and an acquisition unit 352. Each of these units is a functional module realized based on a program executed by the device processing unit 35. Each of these units may be implemented in the measurement terminal 3 as firmware.

[0029] The estimation unit 351 estimates the direction of arrival of the radio wave from the transmission source and the distance between the terminal reception unit 311 and the transmission source, based on the radio wave received by the terminal reception unit 311. The estimation unit 351 includes a frequency conversion unit 3511, an analog / digital conversion unit (A / D conversion unit) 3512, and an estimation processing unit 3513 as functional blocks.

[0030] Frequency conversion unit 3511 amplifies the received radio waves from the transmission source and converts them into an intermediate frequency that can be A / D converted by A / D conversion unit 3512. A / D conversion unit 3512 samples the received signal and performs analog-to-digital conversion to digitize it. The data digitized by A / D conversion unit 3512 is output to estimation processing unit 3513.

[0031] Estimation processing unit 3513 has, as functional blocks, a spectrum analysis unit that analyzes the frequency spectrum of the signal received by terminal receiving unit 311, and a wave source estimation unit. The spectrum analysis unit converts the signal received by terminal receiving unit 311 into a signal on the frequency axis and estimates the frequency of the received signal by analyzing the frequency spectrum. In addition, the wave source estimation unit calculates a correlation function of the amplitude and phase information of the radio wave received by terminal receiving unit 311, and performs FFT (fast Fourier transform) processing to estimate the direction of arrival of the radio wave from the transmission source and the distance between terminal receiving unit 311 and the transmission source.

[0032] The acquisition unit 351 acquires the feature quantities of radio waves from a transmission source received by an antenna. Radio waves emitted from a transmission source vary from one source to another due to differences in the specifications of the transmission source, or even if the specifications are the same, due to variations in the characteristics of analog circuits, etc. The acquisition unit 351 acquires the individual differences as the feature quantities of radio waves according to the transmission source. The feature quantities include, for example, the transient of the received radio wave signal, the power spectral density of the preamble portion, the error vector amplitude, and the frequency offset.

[0033] The server 4 is an information processing device and includes a server communication unit 41, a server storage unit 42, a server processing unit 43, etc. These components are connected via a bus 44.

[0034] The server communication unit 41 is configured to enable the server 4 to communicate with other devices and includes a communication interface circuit. The communication interface circuit included in the server communication unit 41 is a communication interface circuit for a mobile communication system, a wireless LAN, etc. The server communication unit 41 serves as a server receiving unit, receiving data from other devices and supplying it to the server processing unit 43, and serves as a server transmitting unit, transmitting data supplied from the server processing unit 43 to other devices.

[0035] The server storage unit 42 is configured to store programs and data, and includes a semiconductor memory in one example. The server storage unit 42 stores, as programs, an operating system program, a driver program, an application program, and the like used for processing by the server processing unit 43. In one example, the programs are installed into the server storage unit 42 from a computer-readable, non-transitory, portable storage medium such as a CD-ROM or a DVD-ROM. The server storage unit 42 stores location information of the source, feature amount data, individual information, and monitoring target information, which is information indicating the monitoring target.

[0036] The server processing unit 43, which functions as a control unit, is a device that comprehensively controls the operation of the server 4, and includes one or more processors and their peripheral circuits. The server processing unit 43 includes, for example, a CPU. The server processing unit 43 may also include a DSP, an LSI, an ASIC, an FPGA, etc. The server processing unit 43 controls the operation of each component and executes various processes so that the various processes of the server 4 are executed in an appropriate order based on the programs stored in the server storage unit 42.

[0037] The server processing unit 43 includes, as functional blocks, an identifying unit 431, a registering unit 432, and an alarm signal output unit 433. Each of these units is a functional module realized based on a program executed by the server processing unit 43. Each of these units may be implemented in the server 4 as firmware.

[0038] The identification unit 431 identifies individual information of the transmission source according to the feature amount. The identification unit 431 may identify the individual information (identification information) from a UUID (Universally Unique Identifier) ​​used in a short-range wireless communication standard. The identification unit 431 compares the feature amount of the transmission source with the feature amounts of other transmission sources stored in the server storage unit 42 and / or the feature amounts of other transmission sources received by the terminal receiving unit 311, and identifies the individual information of the transmission source.

[0039] The identification unit 431 may use machine learning to identify the individual information of the source. In one example, the identification unit 431 inputs the feature data into a trained model and identifies the individual information based on the output of the trained model.

[0040] The registration unit 432 registers, as a monitoring target, a source having the individual information identified by the identification unit 431. The alarm signal output unit 433 outputs an alarm signal when the monitoring target registered by the registration unit 432 is located within a predetermined area.

[0041] FIG. 3 is a diagram showing an example of a data structure T1 of the monitoring target information. The server processing unit 43 generates the monitoring target information based on individual information. The server processing unit 43 may generate the monitoring target information based on location information and individual information. In one example, the monitoring target information includes, in addition to an identification ID, at least one of the following: proximity information indicating information about the distance from the source, such as "long distance," "close distance," and "short distance," relationship information indicating information about the number of encounters with the source, such as "first sight," "second sight," and "frequent," and threat information indicating information about the threat of the source, such as "following," "stalking," and "staying." The server processing unit 43 periodically acquires location information and individual information of the source and generates proximity information, relationship information, and threat information.

[0042] Fig. 4 is a sequence diagram showing an example of the operation of the call source identification system. The processing shown in Fig. 4 is realized by the device processing unit 35 and the server processing unit 43 working together with each component of the call source identification system 1 based on the programs stored in the device storage unit 32 and the server storage unit 42.

[0043] In step S101, the terminal receiving unit 311 receives radio waves from a transmission source. The terminal receiving unit 311 may receive the radio waves continuously.

[0044] In step S102, the estimation unit 351 estimates, based on the radio waves received by the terminal reception unit 311, the direction from which the radio waves from the transmission source arrive and the distance between the measurement terminal 3 (terminal reception unit 311) and the transmission source.

[0045] In step S103, the acquisition unit 352 acquires the feature amount of the radio wave from the transmission source received by the terminal reception unit 311.

[0046] In step S104, the device processing unit 35 generates location information according to the estimated direction of arrival of the radio wave and the distance between the measurement device 3 and the transmission source, and generates feature data from the acquired feature. The device processing unit 35 transmits the feature data to the server 4 via the device transmission unit 312. The device processing unit 35 may also transmit the location information to the server 4 via the device transmission unit 312.

[0047] In step S105, the server processing unit 43 executes an individual information specifying process, which will be described later. The server processing unit 43 may store the specified individual information in the server storage unit .

[0048] In step S106, the server processing unit 43 transmits the individual information to the measuring terminal 3 via the server communication unit 41. In step S107, the registration unit 432 registers the source having the individual information identified by the identification unit 431 as a monitoring target. The server processing unit 43 also generates the individual information and monitoring target information. The server processing unit 43 stores the monitoring target information in the server storage unit 42. The server processing unit 43 may also transmit the monitoring target information to the monitoring terminal 5 via the server communication unit 41.

[0049] In step S108, the device processing unit 35 generates image data based on the location information and individual information of the transmission source and outputs the image data to the display unit 34, thereby displaying the location information and individual information of the transmission source on the display unit 34.

[0050] In step S109, when the estimation unit 351 receives radio waves (S101), it executes the process of S102, and the device processing unit 35 transmits location information of the transmission source to the server 4 via the terminal transmitting unit 312. Note that when the terminal receiving unit 311 acquires radio waves from the transmission source according to a short-range wireless communication standard, the device processing unit 35 also transmits a received signal of the radio waves to the server 4.

[0051] In step S110, the alarm signal output unit 433 outputs an alarm signal when the monitoring target is located within a predetermined area based on the location information of the transmission source received from the terminal communication unit 31. The alarm signal is, for example, a signal that causes the display unit 34 to display information indicating that the monitoring target (transmission source) is a suspicious person and may have committed a crime. The server processing unit 43 transmits the alarm signal to the measuring terminal 3 via the server communication unit 41. Note that, when a radio wave reception signal conforming to a short-range wireless communication standard has been transmitted from the terminal transmission unit 312, the registration unit 432 registers the identification information acquired from the transmission source as information specifying the monitoring target. The identification information is, for example, a UUID.

[0052] In step S111, the device processing unit 35 generates image data based on the received alarm signal and outputs it to the display unit 34, thereby displaying content such as "Suggestion: Evacuate / Report" and "Reason: Suspicious Person" on the display unit 34. With this, the device processing unit 35 and the server processing unit 43 end the processing.

[0053] Fig. 5 is a flow diagram showing an example of individual information identification processing. In the individual information identification processing shown in Fig. 5, the source identification system 1 continuously receives radio waves from the source and identifies the IMEI as individual information.

[0054] In step S201, the identification unit 431 compares the characteristic amount of the received radio wave from the transmission source with the characteristic amount of other radio waves received by the terminal reception unit 311 and / or stored in the server storage unit .

[0055] In step S202, the identification unit 431 estimates a position where the IMEI data is likely to exist from the received radio wave signal, and separates data where the IMEI data is likely to exist from other data.

[0056] In step S203, the identification unit 431 generates a learning model using training data including feature data of the continuously received radio waves from the transmission source and the position of the IMEI data estimated from the first received radio waves from the transmission source, and updates the parameters of the learning model so that the error between the position of the IMEI data output when the feature data is input to the learning model and the position of the IMEI data estimated in step S102, which is the correct data, is reduced, thereby improving the accuracy of determining the position of the data that is determined to be the IMEI of the transmission source.

[0057] In step S204, the identification unit 431 estimates the data position determined to be the position of the IMEI data using the trained model whose discrimination accuracy has been improved in step S103.

[0058] In step S205, the identification unit 431 identifies the individual information based on the estimated data position. This completes the individual information identification process.

[0059] The transmission source identification system 1 of embodiment 1 estimates the direction of arrival of the radio waves and the distance between the measurement terminal 3 (terminal receiving unit 311) and the transmission source, acquires the characteristic quantities of the radio waves received by the terminal receiving unit 311, identifies individual information of the transmission source according to the characteristic quantities, and displays the location information of the transmission source and the individual information of the transmission source on the display unit 34. This allows the transmission source identification system 1 to monitor the transmission source as a specific target. In other words, the transmission source identification system 1 can visualize the existence of the transmission source in the information space of radio waves in the physical space.

[0060] Furthermore, the source identification system 1 registers a source having identified individual information as a monitoring target, so even in cases where there are multiple sources, it is possible to monitor only a specific monitoring target (source).

[0061] Furthermore, the source identification system 1 outputs an alarm signal when a registered monitoring target is located within a predetermined area, so that it can detect the intrusion of the monitoring target and give appropriate instructions.

[0062] Furthermore, in the source identification system 1, when the registration unit 432 registers the identification information obtained from the source based on the short-range wireless communication standard as information for identifying the monitored object, the source identification system 1 becomes able to more easily identify a specific source from other sources.

[0063] (Variation 1) 6 is an exemplary functional block diagram of a transmission source identification device 10 according to Modification 1. The transmission source identification device 10 according to Modification 1 is configured by combining the measurement terminal 3 and server 4 that make up the transmission source identification system 1 into a single device. The transmission source identification device 10 is, for example, a mobile communication terminal such as a smartphone or mobile phone. The transmission source identification device 10 includes an antenna 11, a storage unit 12, a display unit 13, a control unit 14, etc. These components are connected via a bus 15.

[0064] The antenna 11 is configured to receive radio waves from a transmission source. The storage unit 12 is configured to store programs and data, and includes a semiconductor memory in one example. The storage unit 12 stores, as programs, an operating system program, a driver program, an application program, and the like used in processing by the control unit 14. In one example, the program is installed in the storage unit 12 from a computer-readable, non-transitory, portable storage medium such as a CD-ROM or DVD-ROM. The program may also be stored in a storage medium owned by a predetermined server and installed via a network. The storage unit 12 functions as the terminal storage unit 32 and the server storage unit 42.

[0065] The display unit 13 is a component for displaying an image, and includes a display such as a liquid crystal display or an organic EL display. The display unit 13 functions as a display unit .

[0066] The control unit 14 is a device that comprehensively controls the operation of the call source identification device 10, and includes one or more processors and their peripheral circuits. The control unit 14 includes a CPU, for example. The control unit 14 may also include a DSP, an LSI, an ASIC, an FPGA, or the like. The control unit 14 controls the operation of each component and executes various processes so that the various processes of the call source identification device 10 are executed in an appropriate order based on the programs stored in the storage unit 12. The control unit 14 functions as a terminal processing unit 35 and a server processing unit 43.

[0067] The control unit 14 includes, as functional blocks, an estimation unit 141, an acquisition unit 142, an identification unit 143, a registration unit 144, and an alarm signal output unit 145. Each of these units is a functional module realized based on a program executed by the control unit 14. Each of these units may be implemented in the source identification device 10 as firmware. Each of these units functions as an estimation unit 351, an acquisition unit 352, an identification unit 431, a registration unit 432, and an alarm signal output unit 433, respectively.

[0068] The source identification device 10 according to the first modification can also realize the same functions as the source identification system 1 and can obtain the same effects.

[0069] (Another use method 1 of embodiment 1) In the configuration of the emission source identification system 1 according to another usage method 1 of the first embodiment, the measurement terminal 3 is placed in the house 6 shown in Fig. 7, while the server 4 is located outside the house 6. The terminal receiving unit 311 of the measurement terminal 3 receives radio waves from an emission source near the house 6, and the alarm signal output unit 433 outputs an alarm signal if the status information in normal times differs from the status information during measurement. The status information in normal times and the status information during measurement will be described later.

[0070] FIG. 7(a) is a diagram showing an example of status information of the monitoring map M1 under normal conditions, and FIG. 7(b) is a diagram showing an example of status information of the monitoring map M1 during measurement. The monitoring map M1 includes a map image M11 and an emission source density M12. The map image M11 is pre-stored in the server storage unit 42. The map image M11 may be acquired from a map information server (not shown). The emission source density M12 is a graphic that is superimposed on the map image M11 and indicates the density of emission sources in each zone. In the example shown in FIG. 7, the color of the rectangle superimposed on each zone indicates the level of emission source density.

[0071] The server processing unit 43 stores status information in normal times based on the position information of multiple transmission sources registered by the registration unit 432. The status information is information indicating the position status of the transmission sources registered by the registration unit 432. The status information is displayed as a monitoring map M1.

[0072] The server storage unit 42 stores a map image corresponding to a predetermined geographical area. The server processing unit 43 reads the map image from the server storage unit 42 and calculates the emission source density in the read map image based on the location information and individual information (or monitored target information) of multiple emission sources registered by the registration unit 432. The server processing unit 43 identifies each geographical area corresponding to the calculated emission source density. The server processing unit 43 generates a monitoring map M1 by placing rectangles of colors corresponding to the emission source density of the corresponding area in the identified area of ​​the map image. The server processing unit 43 may periodically obtain location information of the registered emission sources from the terminal communication unit 31 and reflect the information on the monitoring map M1. In normal status information, the emission source density shown on the monitoring map M1 does not change. The monitoring map M1 may be transmitted to a monitoring terminal and displayed on a display unit of the monitoring terminal.

[0073] 7(b) shows status information generated based on the location information of multiple emission sources obtained when measuring the emission sources again, and the distribution of emission source density is different between FIG. 7(a) and FIG. 7(b). When the status information in normal times and the status information at the time of measurement differ in this way, the alarm signal output unit 433 outputs an alarm signal. In one example, the alarm signal is a signal that causes the display unit 34 to display content such as "Suggestion: Evacuate / Report" and "Reason: Suspicious Person."

[0074] FIG. 8 is a flowchart showing an example of the operation of the source identification system 1 according to another usage method 1 of the first embodiment.

[0075] In step S301, the terminal receiving unit 311 receives radio waves from a plurality of transmission sources that have already been registered by the registration unit 432.

[0076] In step S302, the estimation unit 351 estimates the direction of arrival of the radio wave and the distance between the measurement terminal 3 and the transmission source for each of the multiple transmission sources.

[0077] In step S303, the terminal processing unit 35 generates location information according to the estimated direction of arrival of each radio wave and the distance between the measurement terminal 3 and the source, and transmits the location information to the server 4 via the terminal transmission unit 312.

[0078] In step S304, the server processing unit 43 stores normal state information in the server storage unit 42 based on the transmitted location information of the plurality of transmission sources.

[0079] In step S305, the terminal receiving unit 311 again measures (receives) radio waves from the registered multiple transmission sources, and the terminal processing unit 35 generates location information according to the estimated direction of arrival of each radio wave and the distance between the measurement terminal 3 and the transmission source, and transmits the location information to the server 4 via the terminal transmitting unit 312 (S301 to S303). Note that the timing of S305 may be periodically, for example, every minute or every hour, or may be based on a request from the user of the transmission source identification system 1.

[0080] In step S306, the server processing unit 43 acquires state information at the time of measurement based on the position information of the plurality of transmission sources acquired when measuring the transmission sources again.

[0081] In step S307, if the status information during normal operation differs from the status information during measurement, the alarm signal output unit 433 outputs an alarm signal. The server processing unit 43 transmits the output alarm signal to the measurement terminal 3 via the server communication unit 41.

[0082] In step S308, the device processing unit 35 generates image data based on the received alarm signal and outputs it to the display unit 34, thereby displaying display content corresponding to the alarm signal on the display unit 34. This completes the processing of the device processing unit 35 and the server processing unit 43.

[0083] The source identification system 1 according to another usage method 1 of the first embodiment stores normal status information based on the location information of multiple registered sources, acquires status information at the time of measurement based on the location information of the multiple sources acquired when measuring the source again, and outputs an alarm signal if the normal status information differs from the status information at the time of measurement. This enables the source identification system 1 to detect a change in the location of the source and grasp an abnormal situation.

[0084] (Another use method 2 of embodiment 1) In the configuration of the source identification system 1 relating to another usage method 2 of embodiment 1, when the terminal receiving unit 311 of the measurement terminal 3 receives radio waves from multiple sources, the registration unit 432 can register the multiple sources as one group, and the alarm signal output unit 433 outputs an alarm signal based on the center of gravity position of the multiple sources.

[0085] 9 is a diagram showing an outline of the center of gravity P' of the multiple transmission sources X1 to X3. In one example, the center of gravity P' is obtained by using a weighted center of gravity method, which is one of the position estimation techniques, to estimate the positions of the multiple transmission sources X1 to X3.

[0086] The server processing unit 43 calculates a center of gravity position P' from the positions of the plurality of transmission sources X1 to X3, and displays the center of gravity positions of the plurality of transmission sources X1 to X3 and the individual information P' on the display unit .

[0087] The alarm signal output unit 433 outputs an alarm signal based on the center of gravity position P' of the multiple transmission sources X1 to X3 to the measurement terminal 3. The device processing unit 35 generates image data based on the alarm signal and outputs it to the display unit 34, thereby displaying display content corresponding to the alarm signal (for example, "Report" and / or "Evacuate") on the display unit 34. This allows the transmission source identification system 1 to give appropriate instructions for the unified behavior of the multiple transmission sources.

[0088] (Other variations and uses) In the other usage methods 1 and 2 of the first embodiment, these usage methods are realized by the source identification system 1, but these usage methods may also be realized by the source identification device 10.

[0089] In the first embodiment, the case where the registration unit 432 registers the source of transmission as a monitoring target based on individual information and identification information (individual information acquired from radio waves according to a short-range wireless communication standard) has been described, but the registration unit 432 may also register the source of transmission as a monitoring target based on identification information instead of individual information.

[0090] 5 identifies the IMEI as the individual information, the identification unit 431 may identify the IMSI as the individual information or may identify other individual information. Furthermore, the individual information identification process does not need to use machine learning when identifying the individual information.

[0091] Furthermore, although the source identification system 1 of the first embodiment is configured by the measurement terminal 3, the server 4, and the monitoring terminal 5, it is not limited to this. In one example, the source identification system 1 may be configured by combining a smartphone and a glasses-type wearable device, or may be configured by further combining these with a server.

[0092] Furthermore, the source identification system 1 of the first embodiment is configured such that the measurement terminal 3 includes the estimation unit 351 and the acquisition unit 352, and the server 4 includes the identification unit 431, the registration unit 432, and the alarm signal output unit 433. However, in one example, these units may all be provided in the server 4. In this case, the measurement terminal 3 will have the functions of an antenna and a display unit. For example, if the measurement terminal 3 is configured by combining a smartphone and a glasses-type wearable device, the smartphone may function as an antenna, and the glasses-type wearable device may function as a display unit.

[0093] Furthermore, in the first embodiment, the alarm signal output unit 433 (alarm signal output unit 145) outputs an alarm signal when the monitoring target is located within a predetermined area, and in the first usage method, it outputs an alarm signal when the status information in normal times differs from the status information at the time of measurement, but these may be combined. That is, the alarm signal output unit may output an alarm signal when the monitoring target is located within a predetermined area and, as a result, the status information in normal times differs from the status information at the time of measurement.

[0094] Furthermore, the display content displayed on the display unit 34 (display unit 13) in response to the alarm signal output by the alarm signal output unit 433 (alarm signal output unit 145) may be changed by machine learning. In one example, the server processing unit 43 (control unit 14) may repeatedly input feedback from users of the call source identification system 1 (call source identification device 10) regarding the alarm signal into a trained model, and change the display content displayed in response to the alarm signal based on the output of the trained model.

[0095] Furthermore, the surveillance map M1 in Figure 7 displays status information by indicating the density of transmission sources using the color of the rectangles superimposed on each area, but in one example, the status information may be displayed by superimposing the locations of multiple transmission sources on a map image.

[0096] Furthermore, in the first embodiment and the first modification, the use of the call source identification system 1 (call source identification device 10) has been described mainly from the perspective of crime prevention, but the call source identification system 1 can also be used for, for example, guiding support at tourist spots and for marketing. In one example, according to a configuration that displays individual information about call sources, when people are crowded at a tourist spot, the call source identification system 1 can display on the display unit 34 that there are multiple call sources, and can suggest actions to users of the call source identification system 1 that correspond to the display. In one example, the alarm signal output unit 433 outputs an alarm signal that causes the display unit 34 to display content such as "Suggestion: Change location" and "Reason: Risk of crowd accident."

[0097] Furthermore, by configuring the system to output an alarm signal when a monitored object is located within a predetermined area, the source identification system 1 can detect when a source (person) enters a specific store, making it possible to monitor the flow of people in the specific store and predict the number of visitors and fluctuations in the number of visitors. Furthermore, the source identification system 1 can also monitor (understand) the relationship between advertisements on SNS (social network services) and the source's entry and exit to a specific store.

[0098] Furthermore, according to the configuration of Figure 9 in which multiple transmission sources are registered as one group and an alarm signal is issued based on the center of gravity of the multiple transmission sources, when there are multiple tourist groups at a tourist destination, the source identification system 1 can treat each tourist group as one group and output an alarm signal based on the center of gravity, thereby giving appropriate instructions (such as ``risk of congestion'' and / or ``recommended to avoid'') according to the behavior of each tourist group.

[0099] It should be understood by those skilled in the art that various changes, substitutions, and alterations can be made to the present invention without departing from the spirit and scope of the present invention. For example, the above-described embodiments and modifications may be appropriately combined within the scope of the present invention. [Explanation of symbols]

[0100] 1. Source Identification System 10 Source Identification Device 3. Measurement device 31 Terminal communication unit 311 Terminal receiving unit (antenna) 32 Terminal memory section 34 Display section 31 Terminal processing unit (control unit) 4 Server 41 Server processing unit (control unit) 42 Server storage unit

Claims

1. The antenna and an estimation unit that estimates a direction of arrival of radio waves and a distance between the antenna and a transmission source based on the radio waves received by the antenna; an acquisition unit that acquires a feature amount of the radio wave received by the antenna; an identification unit that identifies individual information of a source according to the feature amount; a control unit that displays, on a display unit, location information of the transmission source according to the direction of arrival of the radio wave and the distance, and the individual information of the transmission source; A source identification device comprising:

2. The source identification device according to claim 1 , further comprising a registration unit that registers the source having the individual information identified by the identification unit as a monitoring target.

3. 3. The source identification device according to claim 2, further comprising an alarm signal output unit that outputs an alarm signal when a monitoring target registered by said registration unit is located within a predetermined area.

4. the control unit stores state information in a normal state based on the position information of the plurality of transmission sources registered by the registration unit, and acquires state information at the time of measurement based on the position information of the plurality of transmission sources acquired when measuring the transmission sources again; 4. The source identification device according to claim 3, wherein said alarm signal output unit outputs said alarm signal when said normal state information differs from said measurement state information.

5. The source identification device according to claim 2 , wherein the registration unit registers identification information acquired from the source based on a short-range wireless communication standard as information for identifying the monitoring target.

6. the registration unit is capable of registering a plurality of sources as one group; The source identification device according to claim 3 , wherein the alarm signal output unit outputs the alarm signal based on a center of gravity position of the plurality of sources.

7. A source identification system including a measurement terminal and a server, The measurement terminal The antenna and an estimation unit that estimates a direction of arrival of radio waves and a distance between the antenna and a transmission source based on the radio waves received by the antenna; an acquisition unit that acquires a feature amount of the radio wave received by the antenna; a terminal transmitting unit that transmits the feature amount to the server, The server an identification unit that identifies individual information of a source according to the feature amount; a server transmitting unit that transmits the individual information to the mobile communication terminal, The measurement terminal A display unit; and a control unit that displays, on the display unit, location information of the transmission source according to the direction of arrival of the radio wave and the distance, and the individual information of the transmission source. A source identification system characterized by:

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