Origination source information output device, origination source information output system, origination source information output method, and origination source information output program

Abstract

To make it possible to output information for making it easier to identify an origination source of a radio wave.SOLUTION: An origination source information output device receives, from at least any one sensor of a plurality of sensors, radio wave information including position estimation information to be used for estimating a position of a radio wave origination source with respect to a reception radio wave, which is a radio wave received by the sensor; acquires route information, which is information on a route of a mobile body; estimates origination source positions, which are positions of an origination source of the received radio wave, on the basis of a position of the sensor of a transmission source of the radio wave information and the position estimation information; collates the origination source positions in time series with the route indicated by the route information; and outputs information on the mobile body as origination source information indicating a type of the origination source of the received radio wave when similarity between the origination source positions in time series and the route is higher than a predetermined threshold.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a source information output device, a source information output system, a source information output method, and a source information output program. [Background technology]

[0002] One method for finding the source of radio waves that are causing radio interference is to have investigators go to the site when a report of radio interference is received and investigate using measuring instruments, etc. However, this method requires investigators to estimate the location of the source through on-site investigation, which is time-consuming.

[0003] One way to reduce this effort is to have many sensors installed in the field receive radio waves and estimate the location of the radio wave source based on information about the received radio waves. Methods for estimating the location of a radio wave source include the Angle of Arrival (AOA) method, the Power of Arrival (POA) method, and the Time Difference of Arrival (TDOA) method. With these methods, the location of the radio wave source is estimated based on information about radio waves received by sensors in multiple locations. Since investigators can go to the estimated location and confirm the source, it becomes easier to find the source.

[0004] Related techniques include those described in Patent Document 1 and Patent Document 2. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] International Publication No. 2018 / 235537 [Patent Document 2] International Publication No. 2022 / 091238 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the above-mentioned method does not estimate the source of the signal. If the source of the signal is unknown, it may not be easy for an investigator to identify the source when he or she goes to the site.

[0007] In consideration of the above-mentioned problems, the object of the present invention is to provide a source information output device, a source information output system, a source information output method, and a source information output program that enable the output of information that makes it easier to identify the source of radio waves. [Means for solving the problem]

[0008] In one aspect of the present invention, a source information output device includes a receiving unit that receives radio wave information from at least one of a plurality of sensors, the radio wave information including position estimation information that is information used to estimate the position of the source of the radio wave, for received radio waves that are radio waves received by the sensor; an acquisition unit that acquires route information that is information on the route of a moving body; an estimation unit that estimates a source position that is the position of the source of the received radio wave based on the position of the sensor that transmitted the radio wave information and the position estimation information; a comparison unit that compares the source position in a time series with the route indicated by the route information; and an output unit that outputs information of the moving body as source information indicating the type of the source of the received radio wave when the similarity between the source position in a time series and the route is higher than a predetermined threshold value.

[0009] In another aspect of the present invention, a source information output system includes a receiving means for receiving radio wave information from at least one of a plurality of sensors, the radio wave information including position estimation information, which is information used to estimate the position of the source of the radio wave, for the received radio wave, which is the radio wave received by the sensor; an acquiring means for acquiring route information, which is information on the route of a moving body; an estimating means for estimating a source position, which is the position of the source of the received radio wave, based on the position of the sensor that transmitted the radio wave information and the position estimation information; a comparing means for comparing the source position in a time series with the route indicated by the route information; and an output means for outputting information of the moving body as source information indicating the type of the source of the received radio wave when the similarity between the source position in a time series and the route is higher than a predetermined threshold value.

[0010] In another aspect of the present invention, a source information output method receives radio wave information from at least one of a plurality of sensors, the received radio wave being radio waves received by the sensor, including position estimation information which is information used to estimate the position of the source of the radio wave, obtains route information which is information on the route of a moving body, estimates a source position which is the position of the source of the received radio wave based on the position of the sensor that transmitted the radio wave information and the position estimation information, compares the source position in a time series with the route indicated by the route information, and if the similarity between the source position in a time series and the route is higher than a predetermined threshold value, outputs information of the moving body as source information indicating the type of the source of the received radio wave.

[0011] In another aspect of the present invention, the source information output program causes a computer to realize a receiving function for receiving radio wave information from at least one of a plurality of sensors, the radio wave information including position estimation information, which is information used to estimate the position of the source of the radio wave, for the received radio wave, which is the radio wave received by the sensor; an acquisition function for acquiring route information, which is information on the route of a moving body; an estimation function for estimating a source position, which is the position of the source of the received radio wave, based on the position of the sensor that transmitted the radio wave information and the position estimation information; a comparison function for comparing the source position in a time series with the route indicated by the route information; and an output function for outputting information of the moving body as source information indicating the type of the source of the received radio wave when the similarity between the source position in a time series and the route is higher than a predetermined threshold value. Effect of the Invention

[0012] According to the present invention, it is possible to output information that makes it easier to identify the source of radio waves. [Brief description of the drawings]

[0013] [Figure 1] 1 is a diagram illustrating an example of the configuration of a source information output device according to a first embodiment of the present invention. [Diagram 2] FIG. 4 is a diagram illustrating an example of an operation flow of the source information output device according to the first embodiment of the present invention. [Diagram 3] FIG. 11 is a diagram illustrating an example of the configuration of a system including a source information output device according to a second embodiment of the present invention. [Figure 4] FIG. 11 is a diagram illustrating an example of the configuration of a source information output device according to a second embodiment of the present invention. [Diagram 5] 13A and 13B are diagrams illustrating an example of an image that is displayed on a display device by the source information output device according to the second embodiment of the present invention. [Figure 6] FIG. 11 is a diagram illustrating an example of an operation flow of a source information output device according to a second embodiment of the present invention. [Figure 7] FIG. 11 is a diagram illustrating an example of an operation flow of a source information output device according to a second embodiment of the present invention. [Figure 8] FIG. 2 is a diagram illustrating an example of a hardware configuration according to each embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] [First embodiment] A first embodiment of the present invention will be described.

[0015] A specific example of the source information output device 10 in the first embodiment is a source information output device 20 in a second embodiment described later.

[0016] First, a configuration example of the source information output device 10 of this embodiment will be described. Fig. 1 shows a configuration example of the source information output device 10 of this embodiment. The source information output device 10 includes a receiving unit 11, an acquiring unit 12, an estimating unit 13, a matching unit 14, and an output unit 15.

[0017] The receiver 11 receives radio wave information about received radio waves from at least one of the multiple sensors. The received radio waves are radio waves received by the sensor. The radio wave information includes position estimation information. The position estimation information is information used to estimate the position of a source of the radio waves. The source is an object that emits radio waves.

[0018] The acquisition unit 12 acquires route information of a moving object. The route information is information about a route.

[0019] The estimation unit 13 estimates the transmission source position based on the position of the sensor that is the transmission source of the radio wave information and the position estimation information. The transmission source position is the position of the transmission source of the received radio wave.

[0020] The collation unit 14 collates the time-series source location with the route indicated by the route information.

[0021] When the similarity between the time-series source position and the route is higher than a predetermined threshold, the output unit 15 outputs information about the moving body as source information. The source information indicates the type of the source of the received radio wave.

[0022] Next, an example of the operation flow of the source information output device 10 of this embodiment will be described. Fig. 2 shows an example of the operation flow of the source information output device 10 of this embodiment.

[0023] The receiver 11 receives radio wave information on the received radio waves from at least one of the plurality of sensors (step S101).

[0024] The acquisition unit 12 acquires route information of the moving object (step S102).

[0025] The estimation unit 13 estimates the location of the transmission source based on the location of the sensor that is the source of the radio wave information and the location estimation information (step S103).

[0026] The collation unit 14 collates the time-series source location with the route indicated by the route information (step S104).

[0027] When the similarity between the time-series transmission source position and the route is higher than a predetermined threshold, the output unit 15 outputs information about the moving body as transmission source information (step S105). The transmission source information indicates the type of transmission source of the received radio wave.

[0028] As described above, in the first embodiment of the present invention, the source information output device 10 includes a receiving unit 11, an acquiring unit 12, an estimating unit 13, a matching unit 14, and an output unit 15. The receiving unit 11 receives radio wave information about the received radio wave from at least one of the multiple sensors. The received radio wave is radio wave received by the sensor. The radio wave information includes position estimation information. The position estimation information is information used to estimate the position of the source of the radio wave. The acquiring unit 12 acquires route information of the mobile body. The route information is route information. The estimating unit 13 estimates the source position based on the position of the sensor that is the source of the radio wave information and the position estimation information. The source position is the position of the source of the received radio wave. The matching unit 14 matches the time-series source position with the route indicated by the route information. The output unit 15 outputs information of the mobile body as source information when the similarity between the time-series source position and the route is higher than a predetermined threshold value. The source information indicates the type of the source of the received radio wave.

[0029] In this way, when the similarity between the time-series source position and the route is higher than a predetermined threshold, the source information output device 10 outputs information on the moving body as source information indicating the type of source of the received radio waves. This allows the investigator to investigate the moving body indicated as the source information, making it easier to identify the source of the radio waves. Therefore, it becomes possible to output information that makes it easier to identify the source of the radio waves.

[0030] [Second embodiment] Next, a description will be given of the source information output device 20 in the second embodiment of the present invention. Note that a specific example of the source information output device 10 in the first embodiment is the source information output device 20 in the second embodiment.

[0031] 3 shows an example of the configuration of a system including the source information output device 20 of this embodiment. The source information output device 20 is connected to sensors 50-i (i is an integer between 1 and N). The source information output device 20 is also connected to a display means 60. The sensors 50-i and the source information output device 20 are included in a monitoring system 40.

[0032] The sensor 50-i receives radio waves. The radio waves received by the sensor 50-i are hereinafter referred to as received radio waves. The sensor 50-i attempts to receive radio waves while changing the receiving direction and receiving frequency. The sensor 50-i also outputs radio wave information about the received radio waves to the transmission source information output device 20.

[0033] The radio wave information is information related to radio waves. The radio wave information includes position estimation information. The position estimation information is information used to estimate the position of a source of radio waves. The position estimation information is information used in methods such as the AOA method, the POA method, and the TDOA method. The source of radio waves is an object that emits radio waves.

[0034] For example, in the case of the AOA method, the position estimation information includes information on the direction of the radio waves with respect to the sensor 50-i. In this case, the sensor 50-i can estimate the arrival direction of the radio waves by, for example, an antenna whose directivity can be controlled by beamforming or rotation.

[0035] The radio wave information may also include information such as the frequency of the radio wave, the modulation method of the radio wave, the waveform of the radio wave, the received signal level of the radio wave at the sensor 50-i, etc. For example, the radio wave information may include information such as SS-RSRQ (Reference Signal Received Quality).

[0036] The radio wave information may also include radio wave identification information, which is identification information of the source of the radio waves. The radio wave identification information is information that can identify an individual source of the radio waves. The radio wave identification information may include, for example, an International Mobile Equipment Identity (IMEI), an International Mobile Subscriber Identity (IMSI), a Media Access Control (MAC) address, etc. If the source of the radio waves is an unmanned aerial vehicle (UAV), the radio wave identification information may include a remote identification (ID), which is identification information of the UAV.

[0037] The sensor 50-i may be installed in a fixed position or may be movable. The communication method for outputting the radio wave information from the sensor 50-i to the source information output device 20 may be wired or wireless.

[0038] The display means 60 is a man-machine interface such as a display serving as an output device. The display means 60 displays an image. In this embodiment, the source information output device 20 outputs the source information to the display means 60. However, the output destination of the source information is arbitrary. The source information output device 20 may output the source information to an output destination other than the display means 60.

[0039] 4 shows an example of the configuration of the source information output device 20 of this embodiment. The source information output device 20 of this embodiment includes a receiving unit 21, an acquiring unit 22, an estimating unit 23, a collating unit 24, and an output unit 25.

[0040] The receiving unit 21 receives radio wave information about the received radio waves from the sensor 50-i that has received the radio waves, among the sensors 50-1 to 50-N. The radio wave information is information about the radio waves. The received radio waves are the radio waves received by the sensor 50-i. The radio wave information also includes position estimation information. The position estimation information is information used to estimate the position of the source of the radio waves.

[0041] The acquisition unit 22 acquires route information of the mobile object. The route information is information about a route. The route information may include information about the operation time of the mobile object. The operation time is the time when the mobile object passes a point in the route. For example, the route information may indicate a correspondence relationship between the position of a point included in the route and the time when the mobile object passes the point. The mobile object is, for example, a train or a UAV. The mobile object is not limited to a train or a UAV as long as it is a mobile object from which the acquisition unit 22 can acquire route information.

[0042] The acquisition unit 22 acquires the route information from, for example, an information providing server (not shown) etc. The acquisition unit 22 may also acquire the route information from a storage means (not shown) inside or outside the source information output device 20.

[0043] The estimation unit 23 estimates the transmission source position based on the position of the sensor 50-i that is the transmission source of the radio wave information and the position estimation information. The transmission source position is the position of the transmission source of the received radio wave.

[0044] In this embodiment, the estimation unit 23 estimates the transmission source position at predetermined time intervals (for example, every second). At this time, the estimation unit 23 estimates the transmission source position based on radio wave information received by the receiving unit 21 after the radio wave information (including the position estimation information) used in the previous estimation of the transmission source position. The interval for estimating the transmission source position is preferably equal to or longer than the time required for one cycle of attempts to receive radio waves in the sensor 50-i. One cycle of attempts means that attempts are made at least once in each of the reception directions to be tried and in each reception frequency to be tried. When one cycle of attempts is completed, the sensor 50-i starts the next cycle of attempts.

[0045] Furthermore, the estimation unit 23 can acquire information on the position of the sensor 50-i from a storage means inside or outside the source information output device 20. Furthermore, when the sensor 50-i is moving, the receiving unit 21 may receive information on the position of the sensor from the sensor 50-i. In this case, the sensor 50-i may acquire the position information of the sensor 50-i by using, for example, a Global Navigation Satellite System (GNSS).

[0046] When the receiving unit 21 receives radio wave information about the same radio wave from two or more sensors, the estimation unit 23 can estimate the source position based on the two or more pieces of radio wave information about the same radio wave. In this case, the estimation unit 23 can estimate the source position by the AOA method, the POA method, the TDOA method, etc. The radio wave information includes position estimation information according to the method used. For example, when the method used is the AOA method, the position estimation information includes information about the direction of arrival of the radio wave to the sensor.

[0047] The estimation unit 23 may estimate the radio wave information for the same radio wave, for example, based on the similarity of the radio wave feature amount. The radio wave feature amount is, for example, the frequency, the modulation method, the radio wave identification information, etc. In this case, the information on the radio wave feature amount is included in the radio wave information.

[0048] Furthermore, when the receiving unit 21 receives radio wave information about the same radio wave from one sensor, the estimation unit 23 may estimate the source position using one piece of radio wave information. For example, when the position estimation information includes information about the direction of arrival of the radio wave, the estimation unit 23 may estimate a sector-shaped range centered on the direction of arrival as the source position, taking into account an error in the information about the direction of arrival.

[0049] Furthermore, the estimation unit 23 may estimate whether the source of the received radio wave is moving or not based on the time-series source position. For example, the estimation unit 23 may estimate that the source of the received radio wave is moving when the distance between the source position estimated a predetermined number of times ago and the source position estimated this time is greater than a predetermined value.

[0050] The collation unit 24 compares the time-series source position with the route indicated by the route information. The collation unit 24 may perform the collation when the estimation unit 23 estimates that the source of the received radio wave is moving. Furthermore, the acquisition unit 22 may acquire route information of the moving body when the estimation unit 23 estimates that the source of the received radio wave is moving.

[0051] The matching unit 24 matches the time-series source position and the route, for example, by calculating the similarity between the movement trajectory of the source position and the route indicated by the route information. The similarity is calculated, for example, based on the distance between the source position and a point on the route that is closest to the source position. In this case, the shorter the distance between the source position and the route, the higher the similarity. The matching unit 24 can use any method to calculate the similarity. For example, the matching unit 24 may calculate the similarity D by the following formula:

[0052]

number

[0053] In the above formula, M is the number of source positions to be calculated for similarity. dj is the distance between the jth source position and the point on the route that is closest to the jth source position. A is a predetermined value. The number M of source positions to be calculated for similarity and the predetermined value A are determined in advance.

[0054] In addition, when the route information includes information on the travel time, the comparison unit 24 may further use the information on the travel time to compare the time series of the transmission source position and the route. In this case, in the calculation of the similarity D, dj may be the distance between the j-th transmission source position and the position of the mobile body at the time when the j-th transmission source position is estimated.

[0055] The acquisition unit 22 may acquire route information about the train when each of the time-series source positions is within a predetermined distance from the position of the train's track. The collation unit 24 then compares the acquired route information with the time-series source positions. Note that the information about the position of the train's track is stored in a storage means inside or outside the source information output device 20.

[0056] In this way, the route information to be matched can be reduced from route information for two or more types of moving bodies to route information for trains, thereby reducing the load and time required for matching.

[0057] Furthermore, when the time series source position is moving while intersecting with a road, the acquisition unit 22 may determine that the source is a UAV. In this case, the acquisition unit 22 may acquire route information about the UAV. The collation unit 24 then compares the acquired route information with the time series source position. The road position information is stored in a storage means inside or outside the source information output device 20.

[0058] The receiving unit 21 or the estimating unit 23 may estimate whether the received radio wave is a known radio wave by comparing radio wave information of the received radio wave with radio wave information about a known radio wave. If the estimating unit 23 estimates that the received radio wave is a known radio wave, the estimating unit 23 may not need to estimate the source position. Similarly, if the estimating unit 24 estimates that the received radio wave is a known radio wave, the estimating unit 24 may not need to perform the comparison.

[0059] When the similarity between the time-series source position and the route is higher than a predetermined threshold, the output unit 25 outputs information about the moving body as source information. The source information indicates the type of source of the received radio waves. For example, when the similarity between the route of a train and the time-series source position is high, the output unit 25 outputs information indicating that the source is a train as source information.

[0060] The output unit 25 may further output source location information indicating the source location. The output unit 25 may also output route information about a route when the similarity between the time-series source location and the route is higher than a predetermined threshold value.

[0061] The output unit 25 may further output moving object identification information as the source information. The moving object identification information is information that can identify an individual moving object. For example, when the route information includes the moving object identification information, the output unit 25 can output the moving object identification information included in the route information about a route with a high similarity as the source information.

[0062] For example, the moving body is a UAV, and the route information of the UAV includes information on the route position, as well as information on the operation time and moving body identification information. The moving body identification information is, for example, a remote ID. In this case, when the similarity between the time-series source position and the route is higher than a predetermined threshold, the output unit 25 may output, as the source information, information indicating that the source is a UAV and the remote ID.

[0063] There may be two or more moving objects whose time-series source positions and routes have a similarity higher than a predetermined threshold. In this case, the source information output by the output unit 25 may include information about each of the two or more moving objects. The output unit 25 may output the source information about each of the two or more moving objects.

[0064] When there is no route in which the similarity between the time series source position and the route is higher than a predetermined threshold, the output unit 25 may output, as source information, information indicating that there is no route in which the similarity between the time series source position and the route is higher than a predetermined threshold.

[0065] In this embodiment, the output unit 25 outputs the source information to the display means 60. Also, in this embodiment, the output unit 25 outputs the source information as image information for displaying an image on the display means 60. That is, the output unit 25 causes the display means 60 to display an image by outputting the source information to the display means 60.

[0066] The output unit 25 may suppress the output of information related to known received radio waves. By suppressing the output of information related to known received radio waves, the amount of information sent from the source information output device 20 to the output destination can be reduced, and the communication load can be reduced. In addition, it becomes easier for the user to select information.

[0067] Furthermore, the output unit 25 may output the source information to an output destination other than the display means 60. For example, the source information may be data including information on the type of source.

[0068] In this manner, in this embodiment, when the similarity between the time-series source position and the route is higher than a predetermined threshold, the output unit 25 outputs information on the moving body as source information indicating the type of the source of the received radio waves. This allows the investigator to investigate the moving body of the type indicated as the source information, making it easier to identify the source of the radio waves.

[0069] Next, a specific example of an image that the output unit 25 causes the display means 60 to display will be described.

[0070] The image includes information about a type of the source. The image may include a screen item indicating the source position at the source position on the map. The image may include a screen item indicating a route of a mobile object of the source type. The image may include information about the operating time of the mobile object.

[0071] FIG. 5 shows an example of a display image. In the example shown in FIG. 5, train information is output as information indicating the type of source of the received radio waves. In addition, in this figure, the image includes a screen item (solid circle) indicating the source location. Note that the screen item indicating the source location may indicate a range of possible source locations. In addition, the image includes a screen item (dashed line) indicating the train route.

[0072] Furthermore, when the source information includes information about two or more moving objects, the image may include information about each of the two or more moving objects. In this case, the information about each of the moving objects may be displayed in a different display form (such as a color).

[0073] Next, an example of the operation flow of the source information output device 20 of this embodiment will be described. Fig. 6 shows an example of the operation flow of the source information output device 20 of this embodiment.

[0074] Each of the sensors 50-1 to 50-N attempts to receive radio waves while changing the receiving frequency and the receiving direction.

[0075] The receiver 21 receives radio wave information on the received radio wave from the sensor 50-i that has received the radio wave, among the sensors 50-1 to 50-N (step S201).

[0076] The receiver 21 or the estimation unit 23 compares the radio wave information of the received radio wave with radio wave information about a known radio wave to estimate whether the received radio wave is a known radio wave. If the estimation unit 23 estimates that the received radio wave is a known radio wave (NO in step S202), it does not estimate the source position of the received radio wave.

[0077] If the received radio wave is estimated to be an unknown radio wave (YES in step S202), the estimation unit 23 estimates the source position of the received radio wave (step S203). The estimation unit 23 estimates the source position based on the position of the sensor 50-i that transmitted the radio wave information and the position estimation information. In this embodiment, the estimation unit 23 estimates the source position at predetermined time intervals. At this time, the estimation unit 23 estimates the source position based on radio wave information received by the receiving unit 21 after the radio wave information used to estimate the previous source position.

[0078] The acquisition unit 22 acquires route information of the moving object (step S204).

[0079] The collation unit 24 collates the time-series source location with the route indicated by the route information (step S205).

[0080] When there is a route in which the similarity between the time series source position and the route is higher than a predetermined threshold (YES in step S206), the output unit 25 outputs information on the moving object passing through the route as source information (step S207).When there is no route in which the similarity between the time series source position and the route is higher than a predetermined threshold (NO in step S206), the output unit 25 may output information indicating that there is no route in which the similarity between the time series source position and the route is higher than a predetermined threshold as source information.

[0081] Next, another example of the operation flow of the source information output device 20 of this embodiment will be described. Fig. 7 shows an example of the operation flow of the source information output device 20 of this embodiment. The operation shown in Fig. 7 is performed by the source information output device 20 instead of steps S204 to S205 in Fig. 6.

[0082] When the source position is estimated (step S203 in FIG. 6), the acquisition unit 22 checks whether each of the time-series source positions is within a predetermined distance from the train track. If each of the time-series source positions is within a predetermined distance from the train track position (YES in step S301 in FIG. 7), the acquisition unit 22 acquires route information about the train (step S302). Then, the collation unit 24 collates the acquired route information with the time-series source positions.

[0083] When the similarity between the time-series source position and the train route is higher than a predetermined threshold value (YES in step S303), the output unit 25 outputs the train information as the source information (step S304).

[0084] In addition, for each of the time series source positions, if there is a source position that is not within a predetermined distance from the position of the train track (NO in step S301), the acquisition unit 22 checks whether the time series source position is moving and crossing a road. Even if the similarity between the time series source position and the train route is equal to or less than a predetermined threshold (NO in step S303), the acquisition unit 22 checks whether the time series source position is moving and crossing a road. Then, if the time series source position is moving and crossing a road (YES in step S305), the acquisition unit 22 acquires route information of the UAV (step S306). Then, the collation unit 24 collates the acquired route information with the time series source position.

[0085] When the similarity between the time-series source position and the route of the UAV is higher than a predetermined threshold value (YES in step S307), the output unit 25 outputs information about the UAV as source information (step S308).

[0086] If the time series source position does not move across a road (NO in step S305), the acquisition unit 22 acquires route information of other moving objects (step S309). Also, if the similarity between the time series source position and the UAV route is equal to or less than a predetermined threshold (NO in step S307), the acquisition unit 22 acquires route information of other moving objects (step S309). Then, the collation unit 24 collates the acquired route information with the time series source position.

[0087] When there is a route in which the similarity between the time-series source position and the route is higher than a predetermined threshold value (YES in step S206 in FIG. 6), the output unit 25 outputs information on the moving object passing through the route as source information (step S207).

[0088] As described above, in the second embodiment of the present invention, the source information output device 20 includes a receiving unit 21, an acquiring unit 22, an estimating unit 23, a matching unit 24, and an output unit 25. The receiving unit 21 receives radio wave information about the received radio waves from at least one of the multiple sensors. The received radio waves are radio waves received by the sensor. The radio wave information includes position estimation information. The position estimation information is information used to estimate the position of the source of the radio waves. The acquiring unit 22 acquires route information of the mobile body. The route information is route information. The estimating unit 23 estimates the source position based on the position of the sensor that is the source of the radio wave information and the position estimation information. The source position is the position of the source of the received radio waves. The matching unit 24 matches the time-series source position with the route indicated by the route information. The output unit 25 outputs information of the mobile body as source information when the similarity between the time-series source position and the route is higher than a predetermined threshold value. The source information indicates the type of the source of the received radio waves.

[0089] In this way, when the similarity between the time-series source position and the route is higher than a predetermined threshold, the source information output device 20 outputs information on the moving body as source information indicating the type of source of the received radio waves. This allows the investigator to investigate the moving body indicated as the source information, making it easier to identify the source of the radio waves. Therefore, it becomes possible to output information that makes it easier to identify the source of the radio waves.

[0090] The route information may further include information on the travel time, which is the time when the moving object passes a point on the route. The collation unit 24 may further use the travel time information for collation. This enables the source information output device 20 to output more accurate information as the source information.

[0091] The acquisition unit 22 may also acquire route information about trains when each of the time-series transmission source positions is within a predetermined distance from the position of the train track. This allows the route information to be compared to be reduced from route information about two or more types of moving bodies to route information about trains, thereby reducing the load and time required for comparison.

[0092] In addition, the acquisition unit 22 may acquire route information about a UAV when the time-series source position moves across a road. This makes it possible to reduce the route information to be checked from the route information of two or more types of moving bodies to the route information about a UAV, thereby reducing the load and time required for checking.

[0093] The route information may also include moving object identification information that can identify individual moving objects. The output unit 25 may also output, as source information, moving object identification information included in the route information for a route whose similarity is higher than a predetermined threshold value. This allows an investigator to investigate the moving object indicated as the source information, making it easier to identify the source of radio waves.

[0094] The estimation unit 23 may estimate whether the source of the received radio wave is moving or not based on the time-series source position. The acquisition unit 22 may acquire route information when it is estimated that the source is moving. In this way, when the source is not moving, the route information is not acquired and the route information is not collated, so that the load and time required for collation can be reduced.

[0095] Also, the collation unit 24 may calculate the similarity based on the distance between the time-series source position and the route, thereby realizing the calculation of the similarity.

[0096] [Hardware configuration example] An example of the configuration of hardware resources for implementing the source information output device (10, 20) in each of the above-mentioned embodiments of the present invention using one information processing device (computer) will be described. The source information output device may be physically or functionally implemented using at least two information processing devices. The source information output device may also be implemented as a dedicated device. Only some of the functions of the source information output device may also be implemented using an information processing device.

[0097] 8 is a diagram illustrating an example of a hardware configuration of an information processing device capable of implementing the source information output device of each embodiment of the present invention. The information processing device 90 includes a communication interface 91, an input / output interface 92, a calculation device 93, a storage device 94, a non-volatile storage device 95, and a drive device 96.

[0098] 1 may be realized by a communication interface 91 and a computing device. Also, the estimation unit 13 and the matching unit 14 may be realized by a computing device 93.

[0099] The communication interface 91 is a communication means for the source information output device of each embodiment to communicate with an external device by wire and / or wirelessly. When the source information output device is realized using at least two information processing devices, the devices may be connected to each other via the communication interface 91 so as to be able to communicate with each other.

[0100] The input / output interface 92 is a man-machine interface including a keyboard as an example of an input device and a display as an output device.

[0101] The arithmetic device 93 is realized by an arithmetic processing device such as a general-purpose CPU (Central Processing Unit) or a microprocessor, and a plurality of electric circuits. The arithmetic device 93 can, for example, read various programs stored in a non-volatile storage device 95 into the storage device 94 and execute processing according to the read programs.

[0102] The storage device 94 is a memory device such as a RAM (Random Access Memory) that can be referenced by the arithmetic device 93, and stores programs, various data, etc. The storage device 94 may be a volatile memory device.

[0103] The non-volatile storage device 95 is, for example, a non-volatile storage device such as a ROM (Read Only Memory) or a flash memory, and is capable of storing various programs, data, and the like.

[0104] The drive device 96 is, for example, a device that processes reading and writing of data from and to a recording medium 97, which will be described later.

[0105] The recording medium 97 is any recording medium capable of recording data, such as an optical disk, a magneto-optical disk, or a semiconductor flash memory.

[0106] Each embodiment of the present invention may be realized, for example, by configuring a source information output device using an information processing device 90 illustrated in FIG. 8 and supplying a program capable of realizing the functions described in each of the above embodiments to this source information output device.

[0107] In this case, the embodiment can be realized by having the arithmetic unit 93 execute the program supplied to the source information output device. Also, it is possible to configure some, but not all, of the functions of the source information output device in the information processing unit 90.

[0108] Furthermore, the source information output device may be configured so that the above program is recorded on a recording medium 97 and is appropriately stored in the non-volatile storage device 95 at the shipping stage or operation stage of the source information output device. In this case, the method of supplying the above program may be a method of installing the program in the source information output device using an appropriate tool at the manufacturing stage before shipping or at the operation stage. The method of supplying the above program may also be a general method such as downloading the program from an external source via a communication line such as the Internet.

[0109] A part or all of the above-described embodiments can be described as, but is not limited to, the following supplementary notes.

[0110] (Appendix 1) a receiving unit that receives radio wave information including position estimation information used to estimate a position of a source of the radio wave, the position estimation information being information used to estimate a position of a source of the radio wave, for a received radio wave that is a radio wave received by the sensor from at least one of the plurality of sensors; An acquisition unit that acquires route information that is information on a route of a moving object; an estimation unit that estimates a source position, which is the position of a source of the received radio wave, based on a position of a sensor that is a source of the radio wave information and the position estimation information; a collation unit that compares the time-series source location with the route indicated by the route information; an output unit that outputs information about the moving body as source information indicating a type of the source of the received radio wave when a similarity between the time-series source position and the route is higher than a predetermined threshold value; A source information output device comprising:

[0111] (Appendix 2) The route information further includes information on operation times, which are times when the moving object passes through points on the route, The collation unit further uses information on the operation time for the collation. 2. A source information output device as described in appendix 1.

[0112] (Appendix 3) the acquiring unit acquires the route information for a train when each of the source locations in the time series is within a predetermined distance from a track location of the train; 3. A source information output device according to claim 1 or 2.

[0113] (Appendix 4) The acquisition unit acquires the route information about a UAV (unmanned aerial vehicle) when the time-series source position is moving while intersecting a road. 4. A source information output device according to any one of claims 1 to 3.

[0114] (Appendix 5) the route information includes moving object identification information capable of identifying an individual moving object, the output unit outputs, as the source information, the moving object identification information included in the route information for the route in which the similarity is higher than a predetermined threshold value. 5. A source information output device according to any one of claims 1 to 4.

[0115] (Appendix 6) The estimation unit estimates whether or not the source of the received radio wave is moving based on the time-series source position; The acquisition unit acquires the route information when it is estimated that the source is moving. 6. A source information output device according to any one of claims 1 to 5.

[0116] (Appendix 7) The matching unit calculates the similarity based on a distance between the source position in a time series and the route. 7. A source information output device according to any one of claims 1 to 6.

[0117] (Appendix 8) a receiving means for receiving radio wave information including position estimation information used for estimating a position of a source of a radio wave received by the sensor from at least one of the plurality of sensors; An acquisition means for acquiring route information which is information on a route of a moving object; an estimation means for estimating a source position, which is the position of a source of the received radio wave, based on a position of a sensor that is a source of the radio wave information and the position estimation information; A comparison means for comparing the time series of the source positions with the route indicated by the route information; an output means for outputting information about the moving body as source information indicating a type of the source of the received radio wave when a similarity between the time-series source position and the route is higher than a predetermined threshold value; A source information output system comprising:

[0118] (Appendix 9) receiving radio wave information from at least one of the plurality of sensors, the radio wave information including position estimation information used to estimate a position of a source of the radio wave, the position estimation information being ... Obtaining route information, which is information on the route of a moving object; estimating a source position, which is the position of a source of the received radio wave, based on a position of a sensor that is a source of the radio wave information and the position estimation information; Matching the time series of source locations with the route indicated by the route information; outputting information about the moving body as source information indicating a type of the source of the received radio wave when a similarity between the time-series source position and the route is higher than a predetermined threshold value; Source information output method.

[0119] (Appendix 10) The route information further includes information on operation times, which are times when the moving object passes through points on the route, The checking further uses information on the operation time. 10. A method for outputting source information as described in appendix 9.

[0120] (Appendix 11) acquiring the route information for a train if each of the source locations in a time series is within a predetermined distance from a track location of the train; 11. A method for outputting source information according to claim 9 or 10.

[0121] (Appendix 12) Obtaining the path information for a UAV when the source location in time series is moving across a road; A source information output method according to any one of Supplementary Note 9 to Supplementary Note 11.

[0122] (Appendix 13) the route information includes moving object identification information capable of identifying an individual moving object, outputting, as the source information, the moving object identification information included in the route information for the route in which the similarity is higher than a predetermined threshold value; A source information output method according to any one of Supplementary Note 9 to Supplementary Note 12.

[0123] (Appendix 14) estimating whether the source of the received radio wave is moving based on the time series of the source positions; When it is estimated that the source is moving, the route information is acquired. A source information output method according to any one of Supplementary Note 9 to Supplementary Note 13.

[0124] (Appendix 15) calculating the similarity based on a distance between the source location and the path in a time series; A source information output method according to any one of Supplementary Note 9 to Supplementary Note 14.

[0125] (Appendix 16) On the computer, A receiving function for receiving radio wave information including position estimation information, which is information used to estimate a position of a source of a radio wave, for a received radio wave, which is a radio wave received by the sensor, from at least one of the plurality of sensors; An acquisition function for acquiring route information, which is information on the route of a moving object; an estimation function for estimating a source position, which is the position of a source of the received radio wave, based on a position of a sensor that is a source of the radio wave information and the position estimation information; A matching function for matching the time-series source location with the route indicated by the route information; an output function of outputting information of the moving body as source information indicating a type of the source of the received radio wave when a similarity between the time-series source position and the route is higher than a predetermined threshold value; A source information output program that makes this possible.

[0126] (Appendix 17) The route information further includes information on operation times, which are times when the moving object passes through points on the route, The collation function further uses information on the operation time for the collation. 17. The source information output program according to claim 16.

[0127] (Appendix 18) the acquisition function acquires the route information for a train when each of the source locations in a time series is within a predetermined distance from a track location of the train. The source information output program according to claim 16 or 17.

[0128] (Appendix 19) The acquisition function acquires the path information for a UAV when the time series of the source location is moving across a road. A source information output program according to any one of appendix 16 to appendix 18.

[0129] (Appendix 20) the route information includes moving object identification information capable of identifying an individual moving object, The output function outputs, as the source information, the moving object identification information included in the route information for the route whose similarity is higher than a predetermined threshold value. A source information output program according to any one of appendix 16 to appendix 19.

[0130] (Appendix 21) The estimation function estimates whether the source of the received radio wave is moving based on the time-series source position, The acquisition function acquires the route information when it is estimated that the source is moving. A source information output program according to any one of appendix 16 to appendix 20.

[0131] (Appendix 22) The matching function calculates the similarity based on a distance between the source location and the path in a time series. A source information output program according to any one of appendix 16 to appendix 21.

[0132] Although the present invention has been described above with reference to the embodiment, the present invention is not limited to the above embodiment. Various modifications that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention. [Explanation of symbols]

[0133] 10, 20 Source information output device 11, 21 Receiver 12, 22 Acquisition Department 13, 23 Estimation part 14, 24 Collation section 15, 25 Output section 40 Surveillance System 50-i Sensor 60 Display means 90 Information processing equipment 91 Communication Interface 92 Input / Output Interface 93 Arithmetic unit 94 Storage device 95 Non-volatile storage devices 96 Drive device 97 Recording media

Claims

1. a receiving unit that receives radio wave information including position estimation information used to estimate a position of a source of the radio wave, the position estimation information being information used to estimate a position of a source of the radio wave, for a received radio wave that is a radio wave received by the sensor from at least one of the plurality of sensors; An acquisition unit that acquires route information that is information on a route of a moving object; an estimation unit that estimates a source position, which is the position of a source of the received radio wave, based on a position of a sensor that is a source of the radio wave information and the position estimation information; a collation unit that compares the time-series source location with the route indicated by the route information; an output unit that outputs information about the moving body as source information indicating a type of the source of the received radio wave when a similarity between the time-series source position and the route is higher than a predetermined threshold value; A source information output device comprising:

2. The route information further includes information on operation times, which are times when the moving object passes through points on the route, The collation unit further uses information on the operation time for the collation.

2. The source information output device according to claim 1.

3. the acquiring unit acquires the route information for a train when each of the source locations in the time series is within a predetermined distance from a track location of the train; 3. The source information output device according to claim 1 or 2.

4. The acquisition unit acquires the route information about an unmanned aerial vehicle (UAV) when the time-series source position is moving while intersecting a road.

3. The source information output device according to claim 1 or 2.

5. the route information includes moving object identification information capable of identifying an individual moving object, the output unit outputs, as the source information, the moving object identification information included in the route information for the route in which the similarity is higher than a predetermined threshold value.

3. The source information output device according to claim 1 or 2.

6. The estimation unit estimates whether or not the source of the received radio wave is moving based on the time-series source position; The acquisition unit acquires the route information when it is estimated that the source is moving.

3. The source information output device according to claim 1 or 2.

7. The matching unit calculates the similarity based on a distance between the source position in a time series and the route.

3. The source information output device according to claim 1 or 2.

8. a receiving means for receiving radio wave information including position estimation information used for estimating a position of a source of a radio wave received by the sensor from at least one of the plurality of sensors; An acquisition means for acquiring route information which is information on a route of a moving object; an estimation means for estimating a source position, which is the position of a source of the received radio wave, based on a position of a sensor that is a source of the radio wave information and the position estimation information; A comparison means for comparing the time series of the source positions with the route indicated by the route information; an output means for outputting information about the moving body as source information indicating a type of the source of the received radio wave when a similarity between the time-series source position and the route is higher than a predetermined threshold value; A source information output system comprising:

9. receiving radio wave information from at least one of the plurality of sensors, the radio wave information including position estimation information used to estimate a position of a source of the radio wave, the position estimation information being ... Obtaining route information, which is information on the route of a moving object; estimating a source position, which is the position of a source of the received radio wave, based on a position of a sensor that is a source of the radio wave information and the position estimation information; Matching the time series of source locations with the route indicated by the route information; outputting information about the moving body as source information indicating a type of the source of the received radio wave when a similarity between the time-series source position and the route is higher than a predetermined threshold value; Source information output method.

10. On the computer, A receiving function for receiving radio wave information including position estimation information, which is information used to estimate a position of a source of a radio wave, for a received radio wave, which is a radio wave received by the sensor, from at least one of the plurality of sensors; An acquisition function for acquiring route information, which is information on the route of a moving object; an estimation function for estimating a source position, which is the position of a source of the received radio wave, based on a position of a sensor that is a source of the radio wave information and the position estimation information; A matching function for matching the time-series source location with the route indicated by the route information; an output function of outputting information of the moving body as source information indicating a type of the source of the received radio wave when a similarity between the time-series source position and the route is higher than a predetermined threshold value; A source information output program that makes this possible.

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