JP2019174407A - Position detection system, receiving system, position detector, receiving method, position detection method, and computer program - Google Patents

Abstract

To provide a position detection system with which it is possible to detect the position of a moving object with higher accuracy.SOLUTION: Provided is a position detection system comprising: a first shielding member having a first transmissive unit for passing a signal entering from a first direction through and a shielding unit for shielding a signal among the signals transmitted by a transmitter; a first receiver for receiving the signal passing through the first transmissive unit and outputting a first receiver signal; a second shielding member having a second transmissive unit for passing a signal entering from a second direction through and a shielding unit for shielding the signal; a second receiver for receiving the signal passing through the second transmissive unit and outputting a second receiver signal; and a position information acquisition unit for acquiring information that indicates the position of the transmitter, on the basis of the first receiver signal and the second receiver signal. When it is assumed that a direction for viewing the first transmissive unit from the first receiver is a first direction, and a direction for viewing the second transmissive unit from the second receiver is a second direction, a plurality of first receivers are located in the second direction at a first interval, and a plurality of second receivers are located in the first direction at a second interval.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a position detection system, a reception system, a position detection apparatus, a reception method, a position detection method, and a computer program.

  There is a position detection system (see Non-Patent Document 1) that detects the position of a user who owns a wireless transmitter based on whether or not a receiver has received a wireless signal emitted by the wireless transmitter. In this system, when the receiver receives a radio signal, it was found that there was a user in the vicinity of the receiver, but it was not known in which direction it was seen from the receiver. This system is a position detection system with higher positioning accuracy than a trilateral survey method using Wi-Fi (registered trademark) in a building or underground where GPS (Global Positioning System) cannot be used. Conventionally, however, in this system, it has not been known in which direction the user is seen from the receiver. Such a problem is not limited to the position detection of the user, but is a problem common to the general position detection of the moving body.

“What is Beacon?”, [Online], [Search on March 22, 2018], Internet <URL: https://boxil.jp/mag/a3631/>

  In view of the above circumstances, an object of the present invention is to provide a position detection system capable of detecting the position of a moving body with higher accuracy.

  One aspect of the present invention includes a plurality of first transmission units that transmit only the transmitter signal that is incident from a first direction among transmitter signals transmitted by the transmitter, and a shielding unit that blocks the transmitter signal. A first receiver signal indicating that the first shield member and the first shield member surrounded by the first shield member and receiving only the transmitter signal transmitted through the first transmission portion and receiving the transmitter signal A plurality of first receivers that output, a second transmission unit that transmits only the transmitter signal incident from the second direction among transmitter signals transmitted by the transmitter, and a shielding unit that blocks the transmitter signal A second shield member, and a second shield member surrounded by the second shield member and receiving only the transmitter signal transmitted through the second transmission part, and indicating that the transmitter signal has been received. A plurality of second receivers for outputting receiver signals; The position of the first receiver, the prospective angle of the first transmission part viewed from the first receiver, the direction of the first transmission part viewed from the first receiver, and the second receiver A space having a predetermined width based on a position, a prospective angle of the second transmission part viewed from the second receiver, and a direction of the second transmission part viewed from the second receiver. And a position information acquisition unit that acquires information indicating the position of the transmitter based on the first receiver signal and the second receiver signal. Each of the shielding members accommodates only one different first receiver, and each of the plurality of second shielding members accommodates only one different second receiver, and the first transmission portion is viewed from the first receiver. The direction is the first direction, and the direction from which the second transmission part is viewed from the second receiver is the second direction. As described above, the plurality of first receivers are positioned in the second direction at a first interval, and the plurality of second receivers are positioned in the first direction at a second interval. System.

  One aspect of the present invention is the above-described position detection system, wherein the first receiver and the second receiver are further positioned in a direction perpendicular to the first direction and the second direction. .

  One aspect of the present invention is the position detection system described above, further including an absorbing member that absorbs the transmitter signal incident on the first transmission unit or the second transmission unit from a predetermined direction.

  One aspect of the present invention is the position detection system described above, wherein the absorbing member is positioned in the vicinity of the first transmission part or the second transmission part.

  According to the present invention, it is possible to provide a position detection system capable of detecting the position of a moving body with higher accuracy.

The figure which shows the specific system configuration | structure of the position detection system 100 in embodiment. The figure which shows the specific shape and arrangement | positioning of the housing | casing 11, the receiver 12, and the absorber 13 in embodiment. Explanatory drawing explaining using the side view of the receiving unit 1 that the receiving unit 1 does not receive the transmitter signal which injected into the shielding part 110 of the housing | casing 11 in embodiment. Explanatory drawing explaining the receiving unit 1 not receiving the transmitter signal which injected into the absorber 13 in embodiment using the side view of the receiving unit 1. FIG. Explanatory drawing explaining the receiving unit 1 receiving the transmitter signal in embodiment using the side view of the receiving unit 1. FIG. Explanatory drawing explaining the incident direction to the receiving unit 1 of the transmitter signal which the receiving unit 1 can receive in embodiment. Explanatory drawing explaining the receivable space in embodiment. Explanatory drawing explaining that the receivable space of the receiving unit 1 in embodiment is long in one axial direction, and is substantially identical to a straight line in the other direction. The figure which shows the specific example of a function structure of the receiver 12 in embodiment. The figure which shows the specific example of a function structure of the aggregation server 2 in embodiment. The figure which shows the specific example of the active receiver information in embodiment. The figure which shows the specific example of the receiver information in embodiment. The flowchart which shows the flow of the specific process in which the aggregation server 2 in embodiment acquires the information which shows the position of the transmitter 9. FIG. The sequence diagram which shows the flow of the specific process in which the position detection system 100 of embodiment detects the position of the transmitter 9. FIG.

(First embodiment)
FIG. 1 is a diagram showing a specific system configuration of a position detection system 100 according to the first embodiment.
The position detection system 100 includes a receiving system 101 and an aggregation server 2. The reception system 101 includes reception units 1-1 to 1-M (M is an integer).

  The receiving unit 1-R (R is an integer of 1 to M) is a signal transmitted by radio waves transmitted by the transmitter 9, and is a signal incident from one predetermined direction (hereinafter referred to as “transmitter signal”). ). When receiving the transmitter signal, the receiving unit 1-R outputs a signal indicating that the transmitter signal has been received (hereinafter referred to as “receiver signal”). A space in which the receiving unit 1-R can receive a transmitter signal transmitted from the transmitter 9 located inside is referred to as an R-th receivable space. For example, a space in which the transmitter 9 can be located, and a space in which the receiving unit 1-1 can receive a transmitter signal transmitted from the transmitter 9 located inside is referred to as a first receivable space. A space in which the transmitter 9 can be located and in which the receiving unit 1-3 can receive the transmitter signal transmitted by the transmitter 9 located inside is called a third receivable space. The receivable space is a space whose position is determined based on the position of the receiving unit 1. The overlap of receivable spaces is called overlapping space. The receiving unit 1-R includes a housing 11-R, a receiver 12-R, and an absorber 13-R.

The housing 11-R shields the transmitter signal. The housing 11-R is a housing that houses the receiver 12-R. Different casings 11-R accommodate one different receiver 12-R. The receiver 12-R receives the transmitter signal transmitted from the transmitter 9 located in the R-th receivable space, and outputs the receiver signal. The reception unit 1-R receiving the transmitter signal specifically means that the receiver 12-R receives the transmitter signal. In addition, the reception unit 1-R outputting the receiver signal specifically means that the receiver 12-R outputs the receiver signal. The absorber 13-R absorbs the signal transmitted from the transmitter 9.
Hereinafter, when the receiving units 1-1 to 1-M are not distinguished from each other, they are referred to as receiving units 1. Hereinafter, the casings 11-1 to 11-M are referred to as the casings 11 when not distinguished from each other. Hereinafter, when the receivers 12-1 to 12-M are not distinguished from each other, they are referred to as receivers 12. Hereinafter, when the absorbers 13-1 to 13-M are not distinguished from each other, they are referred to as the absorber 13. Hereinafter, when the first receivable space to the Rth receivable space are not distinguished, they are referred to as receivable spaces.

  Receiving units 1-1 to 1-N (N is a positive integer smaller than M) are arranged at predetermined intervals so as to receive transmitter signals incident from the direction of the X axis in FIG. Specifically, for example, the receiving units 1-1 to 1-N are arranged at a predetermined interval (specific example of the first interval) parallel to the Y axis. The Y axis is an axis orthogonal to the X axis. The receivable space of the receiving units 1-1 to 1-N is a space parallel to the X axis. The receiving units 1- (N + 1) to 1-M are arranged at a predetermined interval (specific example of the second interval) so as to receive the transmitter signal incident from the direction of the Y axis in FIG. The receivable space of the receiving units 1- (N + 1) to 1-M is a space parallel to the Y axis. Note that the intervals at which the receiving units 1-1 to 1-N are arranged and the intervals at which the receiving units 1- (N + 1) to 1-M are arranged are not necessarily the same.

  The aggregation server 2 acquires the receiver signal output by the receiving unit 1-R, and acquires information indicating the position of the transmitter 9 based on the acquired receiver signal.

The transmitter signal that is not received by the receiving unit 1 and the transmitter signal that is received by the receiving unit 1 will be described with reference to FIGS.
FIG. 2 is a diagram illustrating specific shapes and arrangements of the housing 11, the receiver 12, and the absorber 13 in the embodiment. The side view of FIG. 2 is a side view of the receiving unit 1. The front view of FIG. 2 is a view of the receiving unit 1 viewed from a direction perpendicular to the side surface of the receiving unit 1. As shown in the side view and front view of FIG. 2, the housing 11 is a cylindrical member having a circular bottom. As for the housing | casing 11, a side surface and a bottom face shield a transmitter signal, and an upper end permeate | transmits a transmitter signal. Hereinafter, the side surface and the bottom surface are referred to as a shielding portion 110. Hereinafter, the upper end is referred to as a transmission part 111. The casing 11 is disposed so as to surround the receiver 12. Note that the casing 11 does not necessarily need to be a cylindrical member having a circular bottom as long as it has a shape surrounding the receiver 12 and has an opening. The housing 11 may be, for example, a cylindrical member having a transmissive portion 111 at the upper end and a rectangular bottom, or a transmissive portion 111 having a trapezoidal bottom at the upper end. A cylindrical member may be sufficient. The absorber 13 is located in the vicinity of the transmission part 111 of the housing 11.

FIG. 3 is an explanatory diagram for explaining that the receiving unit 1 does not receive the transmitter signal incident on the shielding unit 110 of the housing 11 in the embodiment, using a side view of the receiving unit 1.
The radio wave 80 that has entered the shielding unit 110 of the housing 11 from the outside of the receiving unit 1 is reflected by the shielding unit 110. Therefore, the radio wave 80 cannot reach the receiver 12. In FIG. 3, the shielding unit 110 shields the radio wave 80 by reflecting the radio wave 80, but the shielding unit 110 may shield the radio wave 80 by absorbing the radio wave 80. The radio wave 80 is a specific example of a transmitter signal.
Thus, the receiving unit 1 does not receive the transmitter signal that has entered the shielding unit 110 from the outside of the receiving unit 1.

FIG. 4 is an explanatory diagram for explaining that the receiving unit 1 does not receive the transmitter signal incident on the absorber 13 in the embodiment, using a side view of the receiving unit 1.
The radio wave 81 enters the receiving unit 1 from the transmission part 111 of the housing 11. The radio wave 81 enters the absorber 13 before reaching the receiver 12. The radio wave 81 incident on the absorber 13 is absorbed by the absorber 13. If the receiving unit 1 does not have the absorber 13, the radio wave 81 reaches the receiver 12 by being reflected by the shielding unit 110 of the housing 11. However, since the receiving unit 1 includes the absorber 13, the radio wave 81 does not reach the receiver 12. Therefore, the radio wave 81 is not received by the receiver 12. The radio wave 81 is a specific example of a transmitter signal.
Thus, the receiving unit 1 having the absorber 13 does not receive the transmitter signal incident from the direction incident on the absorber 13.

FIG. 5 is an explanatory diagram for explaining that the receiving unit 1 receives the transmitter signal in the embodiment, using a side view of the receiving unit 1.
The radio wave 82 enters the receiving unit 1 from the transmission part 111 of the housing 11. The radio wave 82 reaches the receiver 12 without entering the absorber 13. Therefore, the radio wave 82 is received by the receiver 12. The radio wave 82 is a specific example of a transmitter signal.
Thus, the receiving unit 1 receives the transmitter signal that passes through the transmission unit 111 and is directly incident on the receiver 12.

FIG. 6 is an explanatory diagram for explaining the incident direction of the transmitter signal that can be received by the receiving unit 1 in the embodiment to the receiving unit 1.
The radio wave 83 enters the transmission unit 111 from the outside of the reception unit 1, passes through the end point H <b> 1 that is the end of the absorber 13 in the positive direction of the X axis, and enters the receiver 12. The radio wave 84 enters the transmission unit 111 from the outside of the reception unit 1, passes through the end point H <b> 2 that is the end of the absorber 13 in the positive direction of the X axis, and enters the receiver 12. Hereinafter, an angle between one or both of the direction in which the radio wave 83 is incident and the direction in which the radio wave 84 is incident and the central axis of the receiving unit 1 is defined as θ.
A radio wave incident from a direction in which the angle formed with the central axis of the receiving unit 1 is larger than θ does not reach the receiver 12 because it enters the absorber 13. Therefore, the receiving unit 1 does not receive radio waves incident from a direction in which the angle formed with the central axis of the receiving unit 1 is larger than θ. The central axis of the receiving unit 1 is the central axis of a cylindrical member that is the casing 11 and is an axis parallel to the X axis in FIG.
The radio wave 83 and the radio wave 84 are specific examples of transmitter signals.

  Thus, the receiving unit 1 receives only the transmitter signal incident on the transmission unit 111 of the receiving unit 1 from the direction in which the angle formed with the central axis of the receiving unit 1 is an angle of θ or less.

  7 and 8, it will be described that the receivable space of the receiving unit 1 in the embodiment is long in one axis direction and is substantially identical to a straight line in the other directions.

FIG. 7 is an explanatory diagram illustrating a receivable space in the embodiment.
As described with reference to FIG. 2 to FIG. 6, the receiving unit 1 is configured such that only the transmitter signal that enters the transmission unit 111 of the receiving unit 1 from the direction in which the angle formed with the central axis of the receiving unit 1 is smaller than θ. Receive. Therefore, the receivable space is a space surrounded by a straight line connecting the receiver 12 and the end point H1 and a straight line connecting the receiver 12 and the end point H2.

FIG. 8 is an explanatory diagram for explaining that the receivable space of the receiving unit 1 in the embodiment is long in one axis direction and is substantially the same in a straight line in the other directions.
As described with reference to FIG. 2 to FIG. 6, the receiving unit 1 is configured such that only the transmitter signal that enters the transmission unit 111 of the receiving unit 1 from the direction in which the angle formed with the central axis of the receiving unit 1 is smaller than θ. Receive. Therefore, assuming that an angle formed by a straight line connecting the end point H1 and the receiving unit 1 and a straight line connecting the end point H2 and the receiving unit 1 is φ, the smaller the φ is, the narrower the receivable space is. That is, the smaller the prospective angle of the transmission part 111 as viewed from the receiver 12, the closer the shape of the receivable space becomes to a shape extending in a uniaxial direction.
Thus, as φ decreases, the shape of the receivable space becomes closer to a straight line extending in the uniaxial direction. Therefore, when the formed angle φ is substantially the same as 0, the shape of the receivable space is uniaxial. The long straight line has substantially the same shape.
The receiving unit 1 of the present embodiment is realized by configuring so that the angle φ formed is substantially the same as zero. For this reason, the receivable space of the receiving unit 1 of the present embodiment has substantially the same shape as a straight line that is long in one axis direction. Specifically, the receivable spaces of the receiving units 1-1 to 1-N in FIG. 1 have substantially the same shape as a straight line parallel to the Y-axis direction. Further, the receivable spaces of the receiving units 1- (N + 1) to 1-M in FIG. 1 have substantially the same shape as a straight line parallel to the X-axis direction.
Thus, the receivable space is not only the position of the receiving unit 1, but also the space and the position of the receiving unit 1 are determined based on the angle φ formed and the direction in which the receiver 12 views the transmission unit 111. .

  FIG. 9 is a diagram illustrating a specific example of a functional configuration of the receiver 12 in the embodiment. The receiver 12 includes a CPU (Central Processing Unit), a memory, an auxiliary storage device 122, and the like connected by a bus, and executes a program. The receiver 12 functions as an apparatus including the receiver 121, the receiver signal generation unit 123, and the transmission unit 124 by executing the program.

The receiver 12 includes an interface for receiving a transmitter signal transmitted from the transmitter 9. The receiver 121 receives a transmitter signal transmitted from the transmitter 9.
The auxiliary storage device 122 is configured using a storage device such as a magnetic hard disk device or a semiconductor storage device. The auxiliary storage device 122 stores the identifier of the receiver 121.
The receiver signal generation unit 123 acquires a transmitter signal and generates a receiver signal. The receiver signal indicates the identifier of the transmitter 9 that is the source of the acquired transmitter signal and the identifier of the receiver 12.
The transmission unit 124 includes a communication interface for connecting the receiver 12 to the aggregation server 2. The transmission unit 124 communicates with the aggregation server 2 via a communication network.

  FIG. 10 is a diagram illustrating a specific example of a functional configuration of the aggregation server 2 in the embodiment. The aggregation server 2 includes a CPU (Central Processing Unit), a memory, an auxiliary storage device 202, and the like connected by a bus, and executes a program. The aggregation server 2 functions as an apparatus including the reception unit 201 and the position information acquisition unit 203 by executing the program.

  The receiving unit 201 includes a communication interface for connecting the aggregation server 2 to the receiver 12. The receiving unit 201 receives the receiver signal transmitted from the receiver 12 via the communication network.

The auxiliary storage device 202 is configured using a storage device such as a magnetic hard disk device or a semiconductor storage device. The auxiliary storage device 202 includes active receiver information, receiver information, and transmitter coordinate information.
The active receiver information indicates an active receiver. An active receiver is a receiver 12 that has acquired a transmitter signal, and is a receiver 12 in a predetermined period (hereinafter referred to as an “active period”) whose start time is the time at which the transmitter signal is acquired. . Hereinafter, when the receiver 12 is an active receiver, the receiver 12 is said to be active. The receiver information includes a position where the receiver 12 is installed and information indicating the length of time that the receiver 12 is an active receiver (hereinafter referred to as “active time”). The transmitter coordinate information indicates the coordinates where the transmitter 9 is located.

FIG. 11 is a diagram illustrating a specific example of active receiver information in the embodiment. The active receiver information is stored in the auxiliary storage device 202 as, for example, an active receiver information table D110 shown in FIG. The active receiver information table D110 has a record for each “transmitter ID”. Each record has each value of “JSN-1”, “JSN-2”..., “JSN-N”. “Transmitter ID” represents the identifier of the transmitter 9. “JSN-1” indicates whether or not the receiver 12 whose identifier is JSN-1 is an active receiver that has received the transmitter signal transmitted by the transmitter 9 indicated by “transmitter ID”. “JSN-1” has a value representing “Active” and “NonActive”. “Active” indicates that the receiver 12 having the identifier JSN-1 is an active receiver that has received the transmitter signal transmitted by the transmitter 9 indicated by “transmitter ID”. “NonActive” indicates that the receiver 12 whose identifier is JSN-1 is not an active receiver. The same applies to “JSN-2” to “JSN-N”. That is, “JSN-R” indicates whether or not the receiver 12 whose identifier is JSN-R is an active receiver that has received the transmitter signal transmitted by the transmitter 9 represented by “transmitter ID”. . “JSN-R” has values representing “Active” and “NonActive”. “Active” indicates that the receiver 12 whose identifier is JSN-R is an active receiver that has received the transmitter signal transmitted by the transmitter 9 indicated by “transmitter ID”. “NonActive” indicates that the receiver 12 whose identifier is JSN-R is not an active receiver.
Note that the receiver 12 having the identifier “JSN-1” may be, for example, the receiver 12-1. The receiver 12 whose identifier is “JSN-2” may be, for example, the receiver 12-2.
For example, the record D111 indicates that the receiver 12-1 having the identifier JSN-1 is an active receiver that has received the transmitter signal transmitted from the transmitter 9 having the identifier HSN1. The record D111 indicates that the receiver 12 with the identifier JSN-2, the receiver 12 with the identifier JSN-3, and the receiver 12 with the identifier JSN-N are not active receivers. .

FIG. 12 is a diagram illustrating a specific example of receiver information in the embodiment. The receiver information is stored in the auxiliary storage device 202, for example, as a receiver information table D120 shown in FIG. The receiver information table D120 has a record for each “receiver ID”. Each record has values of “receiver ID”, “location information”, and “active time”. “Receiver ID” represents the identifier of the receiver 12.
“Position information” indicates the position where the receiver 12 indicated by the “receiver ID” is installed. X0 is the coordinate value of the abscissa of the space where there is no overlapping space. Y0 is the coordinate value of the ordinate of the space where there is no overlapping space. The abscissa and ordinate are two coordinate axes in a predetermined coordinate system that represents the position of the space where the receiver 12 and the transmitter 9 exist. For example, in the case of FIG. 1, the predetermined coordinate system is an XY coordinate system. In this case, X0 is the coordinate value of the X coordinate of the receiving units 1- (N + 1) to 1-M, and Y0 is the coordinate value of the Y coordinate of the receiving units 1-1 to 1-N. “Active time” represents the active time of the receiver 12.
For example, in the record D121, the receiver 12 having the identifier “JSN-1” is located in the place represented by north 1 east 3 and belongs to the group G1 and belongs to the group G1, and after receiving the transmitter signal. Indicates that the receiver is active for 1 minute.

  Returning to the description of FIG. The position information acquisition unit 203 acquires information indicating the position of the transmitter 9 based on the receiver signal received by the reception unit 201. The position information acquisition unit 203 includes an active management unit 204, an active receiver number determination unit 205, and a coordinate value acquisition unit 206.

  The active management unit 204 executes activation processing based on the receiver signal. The activation process is a process of recording in the auxiliary storage device 202 that the receiver 12 indicated by the receiver signal is an active receiver that has received the transmitter signal transmitted by the transmitter 9 indicated by the receiver signal. In addition, the active management unit 204 executes the deactivation process when the active time of the receiver 12 indicated by the receiver signal has elapsed after receiving the receiver signal. The deactivation process is a process of recording in the auxiliary storage device 202 the receiver 12 that has acquired the transmitter signal transmitted from the transmitter 9 indicated by the receiver signal as being a receiver 12 that is not an active receiver. . The receiver 12 indicated by the receiver signal is the receiver 12 that has transmitted the receiver signal. Hereinafter, the receiver 12 indicated by the receiver signal is referred to as a signal transmission source receiver. The transmitter 9 indicated by the receiver signal is the transmitter 9 that has transmitted the transmitter signal received by the receiver 12 that has transmitted the receiver signal. Hereinafter, the transmitter 9 indicated by the receiver signal is referred to as a source transmitter.

  Based on the receiver signal, the active receiver number determination unit 205 determines whether the number of active receivers with the same source transmitter is two.

The coordinate value acquisition unit 206 acquires the coordinate value of the location where the transmission source transmitter is located based on the determination result of the active receiver number determination unit 205. Specifically, when the active receiver number determination unit 205 determines that there are two active receivers with the same source transmitter, the coordinate value acquisition unit 206 executes a coordinate value acquisition process. . The coordinate value acquisition unit 206 executes the active receiver coordinate value acquisition process to acquire the coordinate value of the location where the transmission source transmitter is located. In the active receiver coordinate value acquisition process, the coordinate value acquisition unit 206 acquires the coordinate values of the two receivers 12 that have become active receivers by the source transmitter indicated by the receiver signal received by the reception unit 201. It is.
After executing the active receiver coordinate value acquisition process, the coordinate value acquisition unit 206 executes the transmitter coordinate value acquisition process to acquire the coordinate value where the source transmitter is located. The transmitter coordinate value acquisition process is a process of acquiring coordinate values other than a predetermined coordinate value among the coordinate values acquired by the active receiver coordinate value acquisition process. The predetermined coordinate value is a coordinate value in a space where an overlapping space cannot exist. The predetermined coordinate values are, for example, X0 and Y0 in FIG. Specifically, when the coordinate values of the active receiver are (X0, X1) and (Y1, Y0), the transmitter coordinate value acquisition process is a process of acquiring (Y1, X1).

FIG. 13 is a flowchart illustrating a specific processing flow in which the aggregation server 2 according to the embodiment acquires information indicating the position of the transmitter 9.
The receiving unit 201 receives a receiver signal (step S101). The active management unit 204 records the signal source receiver in the auxiliary storage device 202 as an active receiver that has received the transmitter signal transmitted by the source transmitter (step S102). Specifically, by executing the following processing, the active management unit 204 records the signal transmission source receiver in the auxiliary storage device 202 as an active receiver that has received the transmitter signal transmitted from the transmission source transmitter. To do. The active management unit 204 refers to the active receiver information table D110 stored in the auxiliary storage device 202. The active management unit 204 selects a record in which “transmitter ID” represents the identifier of the source transmitter. When the identifier of the signal transmission source receiver is JSN-R, the active management unit 204 rewrites the value of the item “JSN-R” of the selected record to a value indicating “Active”.

  The active receiver number determination unit 205 determines whether or not the number of active receivers is 2 (step S103). The active receiver number determination unit 205 refers to the active receiver information table D110. The active receiver number determination unit 205 selects a record in which “transmitter ID” represents an identifier of a source transmitter. The active receiver number determination unit 205 acquires the values of all the “JSN-R” items in the selected record. The active receiver number determination unit 205 determines that the number of active receivers is 2 when two of the acquired “JSN-R” item values indicate “Active”. The active receiver number determination unit 205 determines that one of the acquired “JSN-R” item values indicates “Active” and all of the acquired “JSN-R” item values are “NonActive”. And the number of active receivers is not two.

When the number of active receivers is 2 (step S103: YES), the coordinate value acquisition unit 206 acquires the coordinate value of the location where the transmission source transmitter is located (step S104).
On the other hand, when the number of active receivers is not 2 (step S103: NO), the aggregation server 2 repeats the control shown in FIG.

FIG. 14 is a sequence diagram illustrating a specific processing flow in which the position detection system 100 according to the embodiment detects the position of the transmitter 9.
The first receiver receives the transmitter signal transmitted from the transmitter 9 (step S201). The first receiver is a specific example of the receiver 12, and is, for example, the receiver 12-1. The first receiver transmits a receiver signal to the communication network (step S202). The aggregation server 2 receives the receiver signal in step S202 via the communication network (step S203). The aggregation server 2 records the receiver indicated by the receiver signal (that is, the first receiver) in the auxiliary storage device 202 as an active receiver (step S204). The aggregation server 2 determines that the number of active receivers is not 2 (step S205).
The second receiver receives the transmitter signal transmitted from the transmitter 9 (step S206). The second receiver is, for example, a receiver 12- (N + 1).
The second receiver transmits a receiver signal to the communication network (step S207). The aggregation server 2 receives the receiver signal in step S207 via the communication network (step S208). The aggregation server 2 records the receiver indicated by the receiver signal (that is, the second receiver) in the auxiliary storage device 202 as an active receiver (step S209). The aggregation server 2 determines that the number of active receivers is 2 (step S210). The aggregation server 2 acquires coordinate values (step S211). The aggregation server 2 outputs the determination result to a display unit (not shown) (step S212).

  Since the position detection system 100 of the embodiment configured as described above has an angle φ substantially equal to 0, the receiver 12 has a receivable space having substantially the same shape on a straight line that is long in one axis direction. Therefore, the position detection system 100 according to the embodiment acquires a coordinate value in a direction not parallel to the receivable space among coordinate values indicating the position of the receiver 12 as a coordinate value indicating the position of the transmitter 9. For this reason, the user of the position detection system 100 of the embodiment can detect the position of the moving body to which the transmitter 9 is attached with higher accuracy.

  In addition, the position detection system 100 according to the embodiment configured as described above includes a plurality of receivers 12 arranged so that a part of the receivable space overlaps, and the angle φ formed is substantially the same as zero. Further, the position detection system 100 according to the embodiment configured as described above is information indicating the position of the transmitter 9 depending on whether or not the transmitter 9 is positioned in the overlapping space of the receivable spaces of the plurality of receivers 12. To get. Therefore, the user of the position detection system 100 of the embodiment can acquire the position of the transmitter 9 by the coordinate value. Specifically, the user of the position detection system 100 of the embodiment can acquire a coordinate value indicating the position of the transmitter 9.

  The position detection system 100 according to the embodiment configured as described above includes the absorber 13. Therefore, the user of the position detection system 100 can control the size of the receivable space of the receiver 12 only by changing the absorber 13 without changing the housing 11.

(Modification)
The receiving unit 1 is not necessarily arranged in parallel to the coordinate axis of the orthogonal coordinate system, and may be arranged in parallel to the coordinate axis of the oblique coordinate system.
The receiving unit 1 is not necessarily arranged two-dimensionally and may be arranged three-dimensionally. Specifically, the receiving unit 1 may be arranged not only in the X-axis direction and the Y-axis direction but also in the Z-axis direction perpendicular to the X-axis and the Y-axis. In this case, the position detection system 100 can indicate the position of the transmitter 9 with a three-dimensional coordinate value.

(Application example)
The position detection system 100 of the present embodiment is installed, for example, in a soccer or swimming game hall. In this case, when the player turns on the transmitter 9, the spectator watching the game through the monitor can know where the interested player is.

  The casings 11-1 to 11-N are examples of the first shielding member. The casings 11- (N + 1) to 11-M are examples of the second shielding member. The transmission part 111 is an example of a first transmission part and a second transmission part. The receivers 12-1 to 12-N are examples of the first receiver. The receivers 12- (N + 1) to 12-M are examples of the second receiver. The direction of the Y axis is an example of the first direction. The direction of the X axis is an example of the second direction. The absorber 13 is an example of an absorbing member. The direction in which the radio wave 80 and the radio wave 81 are incident is an example of a direction other than a predetermined direction. The receiver signal output from the receivers 12-1 to 12-N is an example of a first receiver signal. The receiver signals output from the receivers 12- (N + 1) to 12-M are an example of second receiver signals. The aggregation server 2 is an example of a position detection unit and a position detection device.

Note that all or some of the functions of the receiver 12 and the aggregation server 2 of the embodiment use hardware such as an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). May be realized. The program may be recorded on a computer-readable recording medium. The computer-readable recording medium is, for example, a portable medium such as a flexible disk, a magneto-optical disk, a ROM, a CD-ROM, or a storage device such as a hard disk built in the computer system. The program may be transmitted via a telecommunication line.
The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Reception unit, 2 ... Aggregation server, 11 ... Housing, 12 ... Receiver, 13 ... Absorber, 110 ... Shielding part, 111 ... Transmission part, 121 ... Receiver, 122 ... Auxiliary storage device, 123 ... Receiver Signal generation unit 124 ... transmission unit 101 ... reception system 201 ... reception unit 202 ... auxiliary storage device 203 ... position information acquisition unit 204 ... active management unit 205 ... active receiver number determination unit 206 ... coordinate Value acquisition unit

Claims (8)

A plurality of first shielding members having a first transmission part that transmits only the transmitter signal incident from a first direction among transmitter signals transmitted by the transmitter, and a shielding part that shields the transmitter signal;
A plurality of first receivers that receive only the transmitter signal surrounded by the first shielding member and pass through the first transmission part and output a first receiver signal indicating that the transmitter signal has been received. Machine,
A plurality of second shielding members having a second transmission part that transmits only the transmitter signal incident from a second direction among the transmitter signals transmitted by the transmitter, and a shielding part that shields the transmitter signal; ,
A plurality of second receivers that are surrounded by the second shielding member, receive only the transmitter signal that passes through the second transmission part, and output a second receiver signal indicating that the transmitter signal has been received. Machine,
The position of the first receiver, the prospective angle of the first transmission part viewed from the first receiver, the direction of the first transmission part viewed from the first receiver, and the second receiver A space having a predetermined width based on a position, a prospective angle of the second transmission part viewed from the second receiver, and a direction of the second transmission part viewed from the second receiver. A position detection unit that acquires information indicating the position of the transmitter based on the information indicating the first receiver signal and the second receiver signal;
With
The plurality of first shielding members accommodate only one different first receiver,
The plurality of second shielding members accommodate only one different second receiver,
A direction in which the first transmission unit is viewed from the first receiver is a first direction, and a direction in which the second transmission unit is viewed from the second receiver is a second direction. , Located in the second direction at a first interval, and the plurality of second receivers are located in the first direction at a second interval;
Position detection system. The first receiver and the second receiver are further positioned in a direction perpendicular to the first direction and the second direction;
The position detection system according to claim 1. A plurality of first shielding members having a first transmission part that transmits only the transmitter signal incident from a first direction among transmitter signals transmitted by the transmitter, and a shielding part that shields the transmitter signal;
A plurality of first receivers that receive only the transmitter signal surrounded by the first shielding member and pass through the first transmission part and output a first receiver signal indicating that the transmitter signal has been received. Machine,
A plurality of second shielding members having a second transmission part that transmits only the transmitter signal incident from a second direction among the transmitter signals transmitted by the transmitter, and a shielding part that shields the transmitter signal; ,
A plurality of second receivers that are surrounded by the second shielding member, receive only the transmitter signal that passes through the second transmission part, and output a second receiver signal indicating that the transmitter signal has been received. Machine,
With
The plurality of first shielding members accommodate only one different first receiver,
The plurality of second shielding members accommodate only one different second receiver,
A direction in which the first transmission unit is viewed from the first receiver is a first direction, and a direction in which the second transmission unit is viewed from the second receiver is a second direction. , Located in the second direction at a first interval, and the plurality of second receivers are located in the first direction at a second interval;
Receiving system. A plurality of first shielding members having a first transmission part that transmits only the transmitter signal incident from a first direction among transmitter signals transmitted by the transmitter, and a shielding part that shields the transmitter signal; A plurality of first receivers that receive only the transmitter signal surrounded by the first shielding member and pass through the first transmission part and output a first receiver signal indicating that the transmitter signal has been received. A plurality of second transmission parts that transmit only the transmitter signal incident from the second direction among the transmitter signals transmitted by the transmitter, and a shielding part that shields the transmitter signal. A plurality of shield members and a second receiver signal surrounded by the second shield member, receiving only the transmitter signal that passes through the second transmission part, and indicating that the transmitter signal has been received. A second receiver, and a plurality of said One shielding member accommodates only one different first receiver, and the plurality of second shielding members accommodates only one different second receiver, and the first transmission unit is connected from the first receiver. The viewing direction is the first direction, the viewing direction of the second transmission part from the second receiver is the second direction, and the plurality of first receivers are positioned in the second direction at a first interval. The plurality of second receivers output the first receiver signal output from the first receiver of the receiving system positioned in the first direction at a second interval, and the second receiver outputs The second receiver signal, the position of the first receiver, the prospective angle of the first transmission part viewed from the first receiver, and the direction of the first transmission part viewed from the first receiver. And the position of the second receiver and the prospective angle of the second transmission part viewed from the second receiver Position detection for acquiring information indicating the position of the transmitter based on information indicating a space of a predetermined area determined in advance based on the direction of the second transmission portion viewed from the second receiver Part,
A position detection device comprising: A plurality of first shielding members having a first transmission part that transmits only the transmitter signal incident from a first direction among transmitter signals transmitted by the transmitter, and a shielding part that shields the transmitter signal; A plurality of first receivers that receive only the transmitter signal surrounded by the first shielding member and pass through the first transmission part and output a first receiver signal indicating that the transmitter signal has been received. A plurality of second transmission parts that transmit only the transmitter signal incident from the second direction among the transmitter signals transmitted by the transmitter, and a shielding part that shields the transmitter signal. A plurality of shield members and a second receiver signal surrounded by the second shield member, receiving only the transmitter signal that passes through the second transmission part, and indicating that the transmitter signal has been received. A second receiver, and a plurality of said One shielding member accommodates only one different first receiver, and the plurality of second shielding members accommodates only one different second receiver, and the first transmission unit is connected from the first receiver. The viewing direction is the first direction, the viewing direction of the second transmission part from the second receiver is the second direction, and the plurality of first receivers are positioned in the second direction at a first interval. A plurality of the second receivers, wherein a first output step in which the first receiver of the receiving system located in the first direction at a second interval outputs the first receiver signal;
A second output step in which the second receiver outputs the second receiver signal;
The position of the first receiver, the prospective angle of the first transmission part viewed from the first receiver, the direction of the first transmission part viewed from the first receiver, and the second receiver A space having a predetermined width based on a position, a prospective angle of the second transmission part viewed from the second receiver, and a direction of the second transmission part viewed from the second receiver. And a position detecting step of acquiring information indicating the position of the transmitter based on the first receiver signal and the second receiver signal. A plurality of first shielding members having a first transmission part that transmits only the transmitter signal incident from a first direction among transmitter signals transmitted by the transmitter, and a shielding part that shields the transmitter signal; A plurality of first receivers that receive only the transmitter signal surrounded by the first shielding member and pass through the first transmission part and output a first receiver signal indicating that the transmitter signal has been received. A plurality of second transmission parts that transmit only the transmitter signal incident from the second direction among the transmitter signals transmitted by the transmitter, and a shielding part that shields the transmitter signal. A plurality of shield members and a second receiver signal surrounded by the second shield member, receiving only the transmitter signal that passes through the second transmission part, and indicating that the transmitter signal has been received. A second receiver, and a plurality of said One shielding member accommodates only one different first receiver, and the plurality of second shielding members accommodates only one different second receiver, and the first transmission unit is connected from the first receiver. The viewing direction is the first direction, the second viewing direction is the second viewing direction from the second receiver, and the plurality of first receivers are in the second direction at a first interval. A reception method performed by a reception system, wherein the plurality of second receivers are positioned in the first direction at a second interval,
A first shielding step in which the first shielding member shields the transmitter signal;
A first receiving step in which the first receiver receives only the transmitter signal that passes through the first transmission unit and outputs a first receiver signal indicating that the transmitter signal has been received;
A second shielding step in which the second shielding member shields the transmitter signal;
A second receiving step in which the second receiver receives only the transmitter signal that passes through the second transmission section and outputs a second receiver signal indicating that the transmitter signal has been received;
Receiving method. A plurality of first shielding members having a first transmission part that transmits only the transmitter signal incident from a first direction among transmitter signals transmitted by the transmitter, and a shielding part that shields the transmitter signal; A plurality of first receivers that receive only the transmitter signal surrounded by the first shielding member and pass through the first transmission part and output a first receiver signal indicating that the transmitter signal has been received. A plurality of second transmission parts that transmit only the transmitter signal incident from the second direction among the transmitter signals transmitted by the transmitter, and a shielding part that shields the transmitter signal. A plurality of shield members and a second receiver signal surrounded by the second shield member, receiving only the transmitter signal that passes through the second transmission part, and indicating that the transmitter signal has been received. A second receiver, and a plurality of said One shielding member accommodates only one different first receiver, and the plurality of second shielding members accommodates only one different second receiver, and the first transmission unit is connected from the first receiver. The viewing direction is the first direction, the viewing direction of the second transmission part from the second receiver is the second direction, and the plurality of first receivers are positioned in the second direction at a first interval. The plurality of second receivers output the first receiver signal output from the first receiver of the receiving system positioned in the first direction at a second interval, and the second receiver outputs The second receiver signal, the position of the first receiver, the prospective angle of the first transmission part viewed from the first receiver, and the direction of the first transmission part viewed from the first receiver. And the position of the second receiver and the prospective angle of the second transmission part viewed from the second receiver Position detection for acquiring information indicating the position of the transmitter based on information indicating a space of a predetermined area determined in advance based on the direction of the second transmission portion viewed from the second receiver Step,
A position detection method comprising:   A computer program for causing a computer to function as the position detection device according to claim 4.

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