JP2015047219A - Detection device and runner detection mat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform accurate measurement of running with simple facilities.SOLUTION: A measurement mat is to be used in a running measurement system which measures a running time on the basis of radio signals received from IC tags attached to a runner. The measurement mat comprises: two antenna units 210a and 210b which are arranged side by side in a planar state; and a reader unit which supplies power to the two antenna units 210a and 210b. The reader unit supplies power in order to make the two antenna units 210a and 210b have opposite phases.

Description

  The present invention relates to a detection device used in a detection system that detects a moving time of the mobile body based on a wireless signal received from an IC tag attached to the mobile body, and more particularly, a wireless device received from an IC tag attached to a runner. The present invention relates to a runner detection mat used in a running measurement system that measures a running time based on a signal.

  Patent Documents 1 and 2 disclose a running measurement system that measures a running time based on a radio signal received from an IC tag worn by a runner (moving body).

JP 2000-271259 A JP 2004-248703 A

  In the running measurement system of Patent Document 1, a gate-type arch is necessary to receive a radio signal transmitted from an IC tag, and the equipment is increased in size.

  In the running measurement system of Patent Literature 2, when a runner finishes, the referee needs to hold the antenna over the IC tag worn by each runner and receive a radio signal transmitted from the IC tag. For this reason, measurement errors and measurement time errors may occur.

  An object of the present invention is to enable accurate measurement with simple equipment in measurement of movement of a moving body, particularly in running measurement.

  The detection device of the present invention is a detection device that detects a moving body based on a radio signal received from an IC tag attached to the moving body. The detection device includes a plurality of antennas that receive radio signals output from the IC tag and a power feeding unit that feeds power to the plurality of antennas, and the power feeding unit is a power supply target so that adjacent antennas are in opposite phases to each other. Supply power while switching the antenna.

  The runner detection mat of the present invention is a runner detection mat used in a running measurement system that measures a running time based on a radio signal received from an IC tag attached to the runner. The runner detection mat includes two antennas arranged side by side and a power feeding unit that feeds power to the two antennas, and the power feeding unit feeds the two antennas so as to have opposite phases to each other. To do.

  ADVANTAGE OF THE INVENTION According to this invention, the detection apparatus which enables a highly accurate measurement with simple equipment, and a runner detection mat can be provided.

It is a figure which shows the outline | summary of the running measurement system of Embodiment 1. FIG. It is a figure which shows the structure of the running measurement system of Embodiment 1. 1 is a diagram illustrating a configuration of an electronic pistol according to Embodiment 1. FIG. It is a figure which shows the structure of the running shoes of Embodiment 1. FIG. It is a figure which shows the structure of the IC tag assembly of Embodiment 1. It is a figure which shows the structure of the IC tag of Embodiment 1. 2 is a block diagram illustrating a configuration of a receiving device according to Embodiment 1. FIG. 1 is a block diagram illustrating a configuration of a computer according to a first embodiment. It is a figure which shows the structure of the measurement mat of Embodiment 1. FIG. 2 is a diagram illustrating a configuration of an antenna unit according to Embodiment 1. FIG. It is a figure which shows an example of the installation state to the driving | running lane of the measurement mat of Embodiment 1. FIG. It is a figure which shows the relationship between arrangement | positioning of the measurement mat of Embodiment 1, and a magnetic field. It is a figure which shows an example of the relationship between the inclination of the IC tag of Embodiment 1, and the area | region which can detect an IC tag, and the locus | trajectory of running shoes at the time of a runner's driving | running | working. It is the figure which showed in a wider range the example of the relationship between the inclination of the IC tag of Embodiment 1, and the area | region which can detect an IC tag, and the locus | trajectory of running shoes at the time of a runner's driving | running | working. FIG. 10 is a diagram illustrating power feeding control to a plurality of antenna units according to the second embodiment. It is a figure explaining the communication control in the measurement mat of Embodiment 2. FIG. 6 is a diagram illustrating a configuration of an antenna unit according to Embodiment 3. FIG. It is a figure which shows the structure of the impedance change circuit of the antenna part of Embodiment 3. It is a figure explaining the electric power feeding control and switching control to the some antenna part of Embodiment 3. FIG. FIG. 10 is a diagram illustrating another example of power feeding control to a plurality of antenna units according to the third embodiment. It is a figure which shows the structure of the antenna part which concerns on Embodiment 4. FIG. It is a figure explaining the distribution of the magnetic field by the antenna part which concerns on Embodiment 4. FIG. It is a figure which shows the structure of the running shoes which concern on Embodiment 5. It is a figure which shows the structure of the insole for shoes which concerns on Embodiment 6. FIG. It is a figure which shows the outline | summary of the running measurement system of Embodiment 10. FIG. It is a figure which shows the structure of the running measurement system of Embodiment 10. FIG.

  Embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
1-1. Outline of Running Measurement System FIG. 1 is a diagram showing an outline of a running measurement system of the present embodiment. FIG. 2 is a diagram illustrating a configuration of the running measurement system of the present embodiment.

  The running measurement system is a system for measuring a running time of a runner during running. For example, the running measurement system is arranged and used in a schoolyard or the like. The running measurement system includes an electronic pistol 100, a measurement mat 200 (detection device), a reception device 300, a running shoe 400, a computer 500, a display device 600, a server 700, and the like.

  An outline of the operation of the running measurement system will be described. In the running measurement system, when the trigger of the electronic pistol 100 is pulled, the electronic pistol 100 outputs a radio signal indicating a start. When receiving apparatus 300 receives this radio signal, it converts the signal into a predetermined format and outputs it to computer 500. Upon receiving this signal, the computer 500 starts measuring the travel time. An IC tag is attached to the running shoe 400 of the runner, and the measurement mat 200 includes an IC tag reader. When the runner passes the measurement mat 200, the measurement mat 200 outputs a radio signal indicating a goal for each runner (IC tag). When receiving apparatus 300 receives this radio signal, it converts the signal into a predetermined format and outputs it to computer 500. When receiving a signal in a predetermined format, the computer 500 stops measuring the travel time. The computer 500 obtains the running time for each runner based on the signal indicating the measurement result, generates display image data indicating the result of the race, and outputs the display image data to the display device 600. The display device 600 displays an image based on display image data.

1-2. Next, each device constituting the running measurement system will be described.

1-2-1. Electronic Pistol FIG. 3 is a diagram showing a configuration of the electronic pistol 100 of the present embodiment.

  The electronic pistol 100 includes a trigger 101, a sensor 102, a control unit 103, a radio unit 104, an antenna 105, a flying switch 106, and a sound generation unit 107.

  The sensor 102 detects that the trigger 101 has been pulled. Upon detection, the sensor 102 outputs a signal.

  The flying switch 106 is a switch for operating when a runner's flying occurs at the start. The switch can be composed of various types such as a push button switch and a slide switch.

  When a signal is output from the sensor 102, the control unit 103 generates and outputs a signal (trigger signal) indicating a start (measurement start). The control unit 103 generates and outputs a signal indicating the occurrence of flying when the flying switch 106 is operated.

  The wireless unit 104 generates a wireless signal based on the signal output from the control unit 103 and outputs the wireless signal via the antenna 105.

  In the running measurement system, the wireless unit 104 performs wireless communication with a wireless unit 301 of the receiving device 300 described later. In this wireless communication, in this embodiment, the wireless unit 104 performs wireless communication that conforms to the so-called specific low power wireless standard defined by the Radio Law. For example, the wireless unit 104 generates a radio signal with an output of 10 mW using a frequency in the 920 MHz band defined by the Radio Law Enforcement Rules. As the frequency, a 400 MHz band or a 2.4 GHz band may be used.

  Note that wireless communication is also performed between the wireless unit 301 of the receiving device 300 and the wireless unit 240 of the measurement mat 200, which will be described later, but wireless communication conforming to the specific low power wireless standard is also performed in this wireless communication.

  The sound generator 107 generates a sound when a signal is output from the controller 103. The sound generator 107 can be composed of various types such as a speaker and a piezoelectric element. The sound generator 107 may be configured as an external speaker separated from the pistol body.

  The flying notification may be handled by the following method in addition to operating the flying switch 106. When the trigger 101 is operated twice or more continuously within a predetermined time, the sensor 102 outputs a signal for each operation. Each time a signal is input from the sensor 102, the signal generation unit 103 generates and outputs a signal indicating a start, and the wireless unit 104 also outputs a wireless signal. Then, when the computer 500 described later receives a signal indicating a start twice or more via the receiving device 300, the computer 500 determines that flying has occurred. In this case, the flying switch 106 functions as a switch for performing an operation of resetting the race by transmitting a flying release signal. The predetermined time can be a fixed time of about several seconds, for example. The predetermined time may be a time from when the receiving device 300 receives a radio signal from the electronic pistol 100 until a radio signal from an IC tag worn by the first runner is received.

1-2-2. FIG. 4 is a diagram illustrating a configuration of a running shoe 400 according to the present embodiment. 4A is a view of the inside of the running shoe 400 as viewed from the side, and FIG. 4B is a view of the inside of the running shoe 400 as viewed from above. An IC tag assembly 410 is attached to the front portion of the bottom surface inside the running shoe 400 of the present embodiment.

  FIG. 5 is a diagram showing a configuration of the IC tag assembly 410 of the present embodiment. FIG. 5A is a plan view showing the configuration of the IC tag assembly 410 of this embodiment. FIG. 5B is a cross-sectional view showing the configuration of the IC tag assembly 410 of this embodiment. The IC tag assembly 410 includes an IC tag 420 and two rubber sheets 430 that protect the IC tag 420 with the IC tag 420 interposed therebetween. The IC tag assembly 410 is attached to the front portion of the bottom surface inside the running shoe 400 by, for example, a double-sided tape.

  FIG. 6 is a diagram showing the configuration of the IC tag 420 of the present embodiment.

  The IC tag 420 includes a loop antenna 421, a wireless circuit 422, a power supply circuit 423, a CPU 424, and a memory 425. The wireless circuit 422, the power supply circuit 423, the CPU 424, and the memory 425 are configured by, for example, one IC chip. Note that the configuration of the IC tag 420 illustrated in FIG. 6 is an example, and other configurations may be used as long as communication with the reader can be performed.

  The memory 425 stores various information. The memory 425 stores, for example, the serial number of the IC tag 420.

  The loop antenna 421 is formed in a loop shape as shown in the figure, for example. The IC tag 420 is disposed so that the loop axis direction of the loop antenna 421 is substantially orthogonal to the bottom surface of the running shoe 400. The loop axis direction is a direction perpendicular to the plane including the loop antenna 421.

  The power supply circuit 423 includes a rectifier circuit and the like, rectifies voltage (power) induced in the loop antenna 421, and supplies the rectified voltage to the CPU 424.

  When receiving power from the power supply circuit 423, the CPU 424 reads information stored in the memory 425 and outputs a signal related to the information to the wireless circuit 422.

  When the radio circuit 422 receives a signal from the CPU 424, it performs load modulation and outputs it to the loop antenna 421. As a result, a radio signal is output from the loop antenna 421. The radio circuit 422 uses a frequency of 13.56 MHz.

1-2-3. Receiving Device FIG. 7 is a block diagram showing the configuration of the receiving device 300 of this embodiment.

  The receiving apparatus 300 includes a wireless unit 301, a control unit 302, and an external interface 303.

  The radio unit 301 receives and demodulates radio signals output from the electronic pistol 100 and the measurement mat 200. The control unit 302 performs predetermined signal processing on the demodulated signal and outputs it. The control unit 302 controls the wireless unit 301 and the external interface 103. In addition, the control unit 302 performs communication control between specific low-power wireless devices such as the wireless unit 104 of the electronic pistol 100 and the wireless unit 240 of the measurement mat 200 that output a wireless signal in accordance with the specific low-power wireless standard.

  The external interface 303 converts a signal received by the control unit 302 from data received from the wireless unit 301 into a signal having a predetermined format that can be communicated with the computer 500. Output.

1-2-4. Computer FIG. 8 is a block diagram showing a configuration of a computer 500 of this embodiment.

  The computer 500 includes a CPU 501, a memory 502, a hard disk drive 503 (hereinafter referred to as “HDD 503” as appropriate), a USB interface 504, a network interface 505, and a display interface 506. A solid state drive (SSD) may be provided instead of the HDD.

  The CPU 501 performs arithmetic processing.

  The HDD 503 stores various programs and data that are processed by the CPU 501. For example, the HDD 503 performs predetermined processing on the data measured by the receiving device 300 and causes the display device 600 to display the data, or causes the HDD 503 to record the measured data and data subjected to various processes. A program for storing is stored.

  The memory 502 temporarily stores the program and data when the CPU 501 performs arithmetic processing.

  The USB interface 504 and the network interface 505 are interfaces for transmitting data to / from external devices. In the present embodiment, the network interface 505 and the external interface 303 of the receiving device 300 are connected.

  The display interface 506 outputs the image data output from the CPU 501 to the display device 600 in a predetermined format.

  The computer 500 functions as a measurement device by executing the program. When the computer 500 as a measuring device receives a signal indicating start from the receiving device 300, the computer 500 starts measuring the travel time. In addition, when the computer 500 receives a signal indicating a goal from the receiving device 300, the computer 500 stops measuring the travel time. In addition, as shown to the schematic diagram of FIG. 1, when several driving | running | working lanes exist and several runners run simultaneously, the measurement mat 200 and the receiver 300 output the signal which shows a goal for every driving | running lane. When the computer 500 receives the signal indicating the goal, the computer 500 stops measuring the travel time for each travel lane. When the computer 500 receives a signal indicating a goal a predetermined number of times, the computer 500 determines that all (predetermined number of) runners in one race have finished. Then, the computer 500 generates display image data based on a signal indicating a measurement result such as a measurement time and outputs the image data to the display device 600.

1-2-5. Display Device The display device 600 displays an image based on image data output from the computer 500.

1-2-6. Server Server 700 has substantially the same configuration as computer 500. Therefore, detailed description of the configuration is omitted. Various data can be stored in the HDD or the like. Various data can be uploaded to the server 700 from the computer 500 via the Internet 800 or the like. For example, the computer 500 can upload data measured by the running measurement system to the server 700 via the network interface 505, the Internet 800, and the like. The server 700 can perform various processes on the data uploaded from a plurality of user computers 500 and provide the data to the user computers 500.

1-2-7. Measurement Mat FIG. 9 is a diagram showing a configuration of the measurement mat 200 of the present embodiment.

  The measurement mat 200 includes a sheet unit 201 and a mat control unit 205. The sheet part 201 is a sheet-like member and is arranged on the goal line. The sheet unit 201 includes a plurality of antenna units 210. The mat control unit 205 includes a reader unit 220, a control unit 230, a radio unit 240, and a transmission antenna 250.

  The antenna unit 210 generates a magnetic field (magnetic flux) for reading information stored in the IC tag, and receives a radio signal output from the IC tag 420. A specific configuration of the antenna unit 210 will be described later.

  The reader unit 220 supplies power to generate a magnetic field in the antenna unit 210. In addition, the reader unit 220 demodulates the radio signal received from the IC tag 420 to acquire and output information indicated by the radio signal.

  The control unit 230 controls the operation of the entire measurement mat 200. In addition, when the control unit 230 receives a signal indicating a goal from the reader unit 220, the control unit 230 outputs the signal to the radio unit 240.

  The radio unit 240 generates a radio signal by modulating the signal indicating the goal output from the control unit 230, and outputs the radio signal via the transmission antenna 250. At this time, a radio signal conforming to a specific low power radio standard is generated.

  A specific configuration of the antenna unit 210 will be described. FIG. 10 is a diagram illustrating a configuration of the antenna unit 210 of the present embodiment.

  The antenna unit 210 includes a loop antenna 211 and a matching circuit 212 that are formed in a rectangular shape.

  The loop antenna 211 has a size of about 30 cm × 20 cm, for example.

  The matching circuit 212 matches the output impedance of the reader unit 220 with the input impedance of the loop antenna 211 of the antenna unit 210. A coaxial cable is connected between the input of each matching circuit 212 and the output of the reader unit 220.

  FIG. 11 is a diagram illustrating an example of a state in which the measurement mat 200 according to the present embodiment is installed on a travel lane.

  The plurality of antenna units 210 are arranged in two rows in a row. The antenna row is arranged in a direction orthogonal to the moving direction of the runner (moving body). Specifically, in the present embodiment, each antenna array is arranged in a direction orthogonal to a traveling lane provided along the moving direction of the runner (moving body). The plurality of antenna arrays are arranged side by side in the movement direction. In addition, in the range which does not have a problem with measurement of travel time, it may be a substantially orthogonal direction instead of an orthogonal direction.

  FIG. 12 is a diagram illustrating an image of a magnetic field formed by the loop antenna 211 of the antenna unit 210. In the present embodiment, the antenna unit 210 is arranged so that the loop axis direction of the loop antenna 211 (hereinafter referred to as “mat-side loop antenna 211” as appropriate) is oriented substantially in the vertical direction when installed in the traveling lane. . As shown in FIG. 12, the magnetic flux formed by the mat-side loop antenna 211 is substantially upward in the vertical direction at the center position of the loop antenna 211, and obliquely upward in the vertical direction and horizontally in the distance from the center position. To change. The IC tag 420 also has a loop antenna 211. The loop antenna 421 of the IC tag 420 (hereinafter, the “tag side loop antenna 421” is appropriately the largest electromotive force when the loop axis direction of the loop antenna 421 is parallel to the direction of the magnetic flux from the mat side loop antenna 211. Conversely, when the loop axis direction of the tag side loop antenna 421 is perpendicular to the direction of the magnetic flux from the mat side loop antenna 211, the tag side loop antenna 421 and the magnetic flux from the mat side loop antenna 211 are Since there is no linkage, almost no electromotive force is generated in the tag side loop antenna 421. That is, the tag side loop antenna 421 depends on the positional relationship between the mat side loop antenna 211 and the tag side loop antenna 421 and the inclination of the tag side loop antenna 421. The electromotive force at the antenna 421 changes, so that the IC tag 420 can be detected. But it varies with the positional relationship and the inclination.

  FIG. 13 is a diagram showing an example of the relationship between the inclination of the IC tag 420 and the area where the IC tag 420 can be detected, and the locus of the running shoe 400 when the runner is running. This figure has shown the case where a runner ran from the left side to the right side in the figure. In FIG. 13, the angle formed by the loop axis of the mat side loop antenna 211 and the loop axis direction of the tag side loop antenna 421 (hereinafter referred to as “loop intersection angle” as appropriate) is 0 degree, 30 degrees, 60 degrees, and An IC tag detectable region in the case of 90 degrees is shown as an example. For example, when the loop crossing angle is 0 degree, the detectable region is widened with the center directly above the mat-side loop antenna 211. On the other hand, when the loop crossing angle is 90 degrees, the height of the detectable region is low at a position directly above the center of the mat side loop antenna 211, and when the distance from the center of the mat side loop antenna 211 is horizontal, The height of the detectable area is increased.

  In FIG. 13, each ellipse E <b> 1, E <b> 2 indicates the position of a predetermined portion of the running shoe 400 when the runner runs, and the inclination of the line L passing through the ellipse E <b> 1, E <b> 2 with respect to the horizontal direction Indicates the inclination with respect to the direction. In the present embodiment, as shown in FIG. 4 described above, the IC tag 420 is disposed so that the loop axis direction of the loop antenna 421 is orthogonal to the bottom surface of the running shoe 400. Therefore, the inclination with respect to the horizontal direction of the line L in this figure is also the inclination with respect to the horizontal direction in the direction orthogonal to the loop axis direction of the tag side loop antenna 421. Further, the locus indicated by the black and white filled ellipse E1 indicates the locus of one of the left foot and the right foot of the runner. The trajectory indicated by the lattice-shaped ellipse E2 indicates the trajectory of the other one of the left foot and the right foot of the runner. A portion that is a white ellipse E1 is a position where the IC tag 420 can be detected by the measurement mat 200 in consideration of the inclination of the tag side loop antenna 421. Therefore, in the example of FIG. 13, the IC tag 420 can be detected by the measurement mat 200 when the predetermined portion of the running shoe 400 of the runner exists in the locus indicated by the white oval E.

  FIG. 14 is a diagram showing an example of the relationship between the inclination of the IC tag 420 and the region where the IC tag 420 can be detected, and an example of the locus of the running shoe 400 when the runner is running. These figures show a case where a runner runs from the left side to the right side in the figure. FIG. 14A shows an example corresponding to FIG. FIG. 14B shows a case where the locus of the running shoe 400 is the same as that of FIG. 14A when the runner runs, but the positional relationship between the locus and the measurement mat 200 is different. In this example, even when the runner's running shoe 400 passes above the measurement mat 200, the tag-side loop antenna 211 falls within the range of the detectable region considering the inclination (the inclination of the bottom surface of the running shoe 400). Therefore, the IC tag 420 is not detected in the measurement mat 200.

  In order to deal with such a problem, in this embodiment, as shown in FIG. 11 described above, a plurality of antennas are arranged in two rows in a row. FIG. 14C shows a case where the antenna units 210 are arranged in two rows. In the drawing, the antenna unit 210 on the left side (the rear antenna unit 210 in the traveling direction, hereinafter simply referred to as “rear antenna unit 210”) is disposed at the same position as in FIG. The right antenna section 210 (the front antenna section 210 in the traveling direction, hereinafter referred to as “front antenna section 210” as appropriate) is shown as being disposed 70 cm away from the rear antenna section 210.

  When arranged in two rows as shown in FIG. 14C, the height of the detectable region of each antenna unit 210 is about 70% lower than that in the case of arranging in one row. This is because the magnetic fields generated by the two antenna units 210 affect each other.

  By arranging in this manner in two rows, even if the IC tag 420 does not enter the detectable area of the rear antenna unit 210 and the IC tag 420 cannot be detected, the IC is in the detectable area of the front antenna unit 210. The tag 420 enters and the IC tag 420 can be detected.

  In the present embodiment, a plurality of antenna units 210 are arranged in one traveling lane in the antenna row direction. In the present embodiment, five antenna units 210 are arranged in one traveling lane. This is due to the following reason. That is, when the width of the loop antenna 211 (the length in the antenna row direction) of one antenna unit 210 is made as large as the width of the traveling lane, compared to the case where a plurality of antenna units 210 are provided, The magnitude of magnetic flux generated by the loop antenna 211 is reduced in the width direction of the traveling lane, particularly in the middle position in the width direction. As a result, the power generated in the IC tag 420 of the running shoe 400 is reduced, and there is a possibility that no radio signal is generated from the IC tag 420. That is, even when the runner passes on the measurement mat 200, there is a possibility that the passage of the runner cannot be detected. In order to cope with this, in the present embodiment, a plurality of antenna units 210 are arranged in one traveling lane.

  Moreover, in this embodiment, each antenna part 210 is arrange | positioned so that a driving | running | working lane may not be straddled, as shown in above-mentioned FIG. By disposing each antenna unit 210 so as not to cross the traveling lane, the traveling lane and the antenna unit 210 can be associated with each other. Therefore, by determining which antenna unit 210 has received the radio signal from the IC tag 420, it is possible to determine which lane of the runner has reached the goal.

In the present embodiment, as shown in FIG. 11 described above, the measurement mat 200 is arranged so that the middle position of the two rows of antenna units 210 coincides with the goal line. The computer 500 as a measuring device corrects the measured time based on the column to which the antenna unit 210 that received the wireless signal belongs. Specifically, when the signal from the IC tag 420 is received by the antenna array 210F closer to the start line, the computer 500 stores the corrected measurement time Ta according to the following equation 1 as a measurement time record. Ask for.
(Formula 1)
Ta = T + T / (Lsg−L1) × L1

  Here, T is the actual measurement time, Lsg is the distance from the start line to the goal line, and L1 is half the distance (interval) in the traveling lane direction of the center position of the two antenna rows.

On the other hand, when the signal from the IC tag 420 is received by the antenna array 210R far from the start line, the computer 500 obtains the corrected measurement time Ta according to the following equation 2.
(Formula 2)
Ta = T−T / (Lsg + L1) × L1

  When the signal from the IC tag 420 is received by both antenna arrays 210F and 210R, the computer 500 applies the actual measurement time at the antenna array 210F closer to the start line to (Equation 1). Then, the corrected measurement time Ta is obtained. Note that the computer 500 may obtain the corrected measurement time Ta by applying the actual measurement time at the antenna array 210R far from the start line to (Equation 2).

  By correcting the measurement time in this way, measurement errors can be reduced even when the antenna units 210 are arranged in two rows before and after the goal line.

  In the present embodiment, the measurement mat 200 is arranged so that the middle position between the two rows of antenna units 210 coincides with the goal line. However, an intermediate position between the two rows of antenna units 210 may not coincide with the goal line. In this case, the computer 500 may correct the measured time according to the distance between each of the two rows of antenna units 210 and the goal line.

1-3. Summary As described above, the electronic pistol 100 of the present embodiment is the electronic pistol 100 used in the running measurement system. The electronic pistol 100 includes a trigger 101 and a signal generator (a control unit 103, a radio unit 104, and an antenna 105) that generates a radio signal when the trigger 101 is operated.

  Thereby, the electronic pistol 100 generates a radio signal when the trigger 101 is operated. Therefore, it is not necessary to transmit the signal generated by the electronic pistol 100 by wire. Therefore, it is possible to provide a running measurement system that can measure the run time of a runner with simple equipment.

  The electronic pistol 100 according to the present embodiment also includes a flying switch 106 for operating during flying and a radio signal that generates a radio signal in a mode different from that when the trigger 101 is operated when the flying switch 106 is operated. A two-signal generator (a control unit 103, a radio unit 104, and an antenna 105).

  Thereby, when the flying switch 106 is operated, the electronic pistol 100 generates a radio signal having a mode different from that when the trigger 101 is operated. Therefore, it is not necessary to transmit by wire even when flying occurs. Therefore, the running measurement system can be realized with simpler equipment.

  The electronic pistol 100 of the present embodiment further includes a sound generator 101 that generates a sound when the trigger 101 is operated.

  As a result, the starter and the flying can be notified to the runner as in the case of the gunpowder type pistol.

  The running measurement system of the present embodiment is a running measurement system that measures a running time based on a radio signal received from an IC tag 420 worn by a runner. This running measurement system includes the above-described electronic pistol 100, a measurement mat 200 having an antenna unit 210 that receives a radio signal from an IC tag 420, a reception device 300 that receives a radio signal from the electronic pistol 100, and a reception device. A computer 500 that starts measurement of travel time when 300 receives a radio signal from the electronic pistol 100 and stops measuring travel time when the measurement mat 200 receives a radio signal from the IC tag 420; Including.

  Thereby, the start and stop of measurement of travel time can be automated. In particular, measurement of travel time can be started by a radio signal from the electronic pistol 100 and measurement of travel time can be stopped by a radio signal from the measurement mat 200. Therefore, it is not necessary to transmit a signal for starting or stopping the measurement of travel time by wire. Therefore, it is possible to provide a running measurement system that can measure the run time of a runner with simple equipment.

  In the running measurement system of the present embodiment, when the receiving device 300 receives the radio signal from the electronic pistol 100 again within a predetermined time after receiving the radio signal from the electronic pistol 100, the computer 500 generates a flying signal. You may let them.

  This eliminates the need for wired transmission even when flying occurs. The radio signal received later may be either a radio signal generated by pulling a trigger or a radio signal generated by pulling the flying switch 106. Note that the electronic pistol 100 does not have to include the flying switch 106 as long as the subsequent radio signal is generated by pulling the trigger 101 and the process is determined as a result of the occurrence of flying. In this case, the running measurement system can be realized with simpler equipment.

  In the running measurement system of this embodiment, the computer 500 generates a flying signal when the trigger 101 is operated a plurality of times within a predetermined time, and then cancels the flying when the flying switch 106 is operated. A signal may be generated.

  Thus, when the flying signal is generated by operating the trigger 101 a plurality of times within a predetermined time, the initial state can be restored by the flying cancellation signal.

  In the running measurement system of the present embodiment, the predetermined time may be a fixed time.

  Thereby, it is possible to easily measure the predetermined time with a timer or the like.

  In addition, the running measurement system of the present embodiment is a system that measures the travel time of a plurality of runners traveling in a plurality of travel lanes. The measurement mat 200 receives radio signals from the IC tags 420 worn by a plurality of runners, and the predetermined runner receives the radio signal from the electronic pistol 100 for the predetermined time. It may be the time until a wireless signal is received from the IC tag 420 to be attached.

  Thus, even when the second and subsequent operations are delayed, a flying signal can be generated until the first runner finishes.

  In the running measurement system of this embodiment, the IC tag 420 is attached to the running shoe 400 of the runner.

  Thereby, the position of the IC tag 420 becomes a low position close to the ground when the runner runs. Therefore, the distance between the measurement mat 200 and the IC tag 420 is reduced when the runner travels. Therefore, the measurement mat 200 can easily receive a radio signal from the IC tag 420.

  The measurement mat 200 of the present embodiment is used in a running measurement system that measures travel time based on a radio signal received from an IC tag 420 worn by a runner. The measurement mat 200 includes a plurality of antenna units 210 that receive radio signals output from the IC tag 420, and the plurality of antenna units 210 are arranged in a row in at least one row.

  Thereby, the running measurement system using the measurement mat 200 can be provided. The radio signal output from the IC tag 420 is generally weak. Therefore, in the present embodiment, a radio signal output from the IC tag 420 is received by the measurement mat 200 located near the IC tag 420 worn by the runner. Thereby, the radio signal output from the IC tag 420 can be satisfactorily received.

  In the measurement mat 200 of the present embodiment, the rows of the antenna units 210 (antenna rows) are arranged in a direction substantially orthogonal to the moving direction of the runner (moving body).

  In the measurement mat 200 of the present embodiment, the plurality of antenna rows are arranged side by side in the direction orthogonal to the movement direction of the runner (moving body) and in the movement direction.

  Further, in the measurement mat 200 of the present embodiment, the plurality of antenna units 210 are arranged in two rows.

  Thereby, the detectable region of the IC tag in the traveling direction is wider than in the case of one row.

  In the measurement mat 200 of the present embodiment, the rows of the plurality of antenna units 210 are arranged in the orthogonal direction of the traveling lane (in the direction orthogonal to the moving direction of the runner (moving body)). In the direction, a plurality of antenna units 210 are arranged in one traveling lane.

  Thereby, the difference in magnetic field strength (magnetic flux strength) in one traveling lane can be reduced.

  In the measurement mat 200 of the present embodiment, the rows of the plurality of antenna units 210 are arranged in the orthogonal direction of the traveling lane, and each antenna unit 210 is arranged so as not to cross the traveling lane. .

  Thereby, a travel lane and the antenna part 210 can be matched. Therefore, by determining which antenna unit 210 has received the radio signal from the IC tag 420, it is possible to determine which lane of the runner has reached the goal.

  In the measurement mat 200 of the present embodiment, the IC tag 420 is attached to the running shoe 400 of the runner.

  Thereby, the position of the IC tag 420 becomes a low position close to the ground when the runner runs. Therefore, the distance between the measurement mat 200 and the IC tag 420 is reduced when the runner travels. Therefore, the measurement mat 200 can easily receive a radio signal from the IC tag 420.

  The running measurement system of this embodiment is a running measurement system that measures the running time based on a radio signal received from the IC tag 420 worn by the runner. This running measurement system includes a measurement mat 200 having an antenna unit 210 that receives a radio signal, and a measurement unit that measures the time when the runner passes the measurement mat 200 based on the timing at which the measurement mat 200 receives the radio signal. Computer 500) and a correction unit (computer 500) that corrects the time measured by the measurement unit, and measurement mat 200 includes a plurality of antenna units 210 that receive radio signals output from IC tag 420. The plurality of antenna units 210 are arranged in two rows in the orthogonal direction of the traveling lane, and the correction unit (computer 500) performs measurement based on the column to which the antenna unit 210 that received the radio signal belongs. The time measured by the unit (computer 500) is corrected.

  In the running measurement system of this embodiment, the measurement mat 200 in which a plurality of antenna units 210 that receive radio signals output from the IC tag 420 worn by the runner are arranged in a row receives the radio signals. The measurement mat 200 includes a measurement unit (computer 500) that measures the time when the runner passes the measurement mat 200 based on the timing, and a correction unit (computer 500) that corrects the time measured by the measurement unit. The antenna rows provided are arranged in a plurality of rows in a direction substantially orthogonal to the traveling lane provided along the run direction of the runner. The correction unit (computer 500) includes the antenna unit 210 that receives the radio signal. The time measured by the measuring unit (computer 500) is corrected based on the column to which it belongs.

  Thereby, even when the antenna units 200 are arranged in a plurality of rows in the traveling direction, measurement errors can be reduced.

  In the running measurement system of this embodiment, the IC tag 420 is attached to the running shoe 400 of the runner.

  Thereby, the position of the IC tag 420 becomes a low position close to the ground when the runner runs. Therefore, the distance between the measurement mat 200 and the IC tag 420 is reduced when the runner travels. Therefore, the measurement mat 200 can easily receive a radio signal from the IC tag 420.

  As described above, the running shoe 400 according to the present embodiment is a running shoe 400 that is used in combination with the measurement mat 200 including the antenna unit 210 that can transmit and receive a radio signal to and from the IC tag 420. The tag 420 is disposed on the front side of the bottom surface inside the running shoe 400.

  Thus, when the runner passes over the measurement mat 200, the IC tag 420 passes through a position close to the measurement mat 200 in the entire running shoe. Therefore, the detection of the IC tag 420 by the measurement mat 200 is good.

  In the running shoe 400 of the present embodiment, the IC tag 420 is disposed on the front side of the bottom surface inside the running shoe 400 while being sandwiched between the rubber sheets 430.

  Thereby, the IC tag 420 can be well protected by the rubber sheet 430.

(Embodiment 2)
When a plurality of antenna units 210 are arranged in a row as in the first embodiment, the detection that the IC tag 420 has passed over the measurement mat 200 is unstable due to the influence of the magnetic field generated from the adjacent antenna units 210. There is a possibility. In order to cope with this, in the present embodiment, the control unit 230 of the measurement mat 200 performs the following control.

  FIG. 15 is a diagram illustrating power feeding control to a plurality of antenna units 210 according to the second embodiment.

  In the present embodiment, the control unit 230 of the measurement mat 200 controls the reader unit 220 so that power is supplied to the plurality of antenna units 210 while switching between the two modes every predetermined time. The predetermined time is, for example, 5 ms, but is not limited thereto. The first mode is a mode in which power is supplied to the odd-numbered antenna units 210 from one end side of the antenna array, but power is not supplied to the even-numbered antenna units 210. On the other hand, the second mode is a mode in which power is not supplied to the odd-numbered antenna units 210 from one end of the antenna array, but power is supplied to the even-numbered antenna units 210. Thereby, in all the antenna parts 210, a power feeding state is switched for every predetermined time. Further, power is not supplied to adjacent antenna units 210 at the same time. By preventing the adjacent antenna units 210 from being turned on at the same time, the detection that the IC tag 420 has passed over the measurement mat 200 becomes unstable due to the influence of the magnetic field generated from the adjacent antenna unit 210. Is suppressed.

  FIG. 16 is a diagram for explaining communication control in the measurement mat 200 of the second embodiment.

  When power is not supplied to the antenna unit 210, the control unit 230 and the reader unit 220 communicate with each other. Specifically, the control unit 230 issues a read command to the reader unit 220. When receiving the read command, the reader unit 220 transmits the data read from the IC tag 420 to the control unit 230. When power is being supplied to the antenna unit 210, the reader unit 220 and the IC tag 420 of the running shoe 400 communicate via the antenna unit 210. Specifically, when the IC tag 420 of the running shoe 400 enters the magnetic field detectable region generated by the antenna unit 210, the information recorded in the memory 425 is stored using the power generated in the loop antenna 421. Transmit to the reader unit 220.

  As described above, the measurement mat 200 of the present embodiment is used in a running measurement system that measures the travel time based on the radio signal received from the IC tag 420 worn by the runner. The measurement mat 200 includes a plurality of antenna units 210 that receive radio signals output from the IC tag 420, and a reader unit 220 that feeds power to the plurality of antenna units 210. The reader unit 220 includes adjacent antenna units 210. Feeds power while switching the antenna unit 210 to be fed so as not to generate a magnetic field at the same time.

  As described above, in this embodiment, the reader unit 220 feeds power while switching the antenna unit 210 to be fed so that adjacent antenna units 210 do not generate a magnetic field at the same time. Thereby, it is suppressed that the detection that the IC tag 420 has passed over the measurement mat 200 becomes unstable due to the influence of the magnetic field generated from the adjacent antenna unit 210.

  In the present embodiment, the case where two modes are provided has been described. However, for example, when three modes are provided and power is supplied to the first antenna unit 210, power is not supplied to the second and third antenna units 210, but power is supplied to the fourth antenna unit 210 and the fifth antenna is supplied. The control unit 230 may control the reader unit 220 so that power is not supplied to the unit 210.

(Embodiment 3)
When the arrangement intervals of the antenna units 210 are narrow, the antenna units 210 are electromagnetically coupled to each other. Therefore, even if the power supply of the adjacent antenna units 210 is OFF, the antenna units 210 to be fed are adjacent to each other. Only the arrangement of 210 affects the impedance of the antenna unit 210 to be fed, and the detection performance of the IC tag 420 is degraded. In order to cope with this, each antenna unit 210 of the present embodiment includes a circuit for changing the impedance of the loop antenna 211 in addition to the configuration of the antenna unit 210 of the second embodiment (hereinafter referred to as “impedance changing circuit” as appropriate). Is further provided.

  FIG. 17 is a diagram illustrating a configuration of the antenna unit 210 according to the third embodiment. FIG. 18 is a diagram illustrating a configuration of an impedance changing circuit of the antenna unit according to the third embodiment.

  Impedance changing circuit 260 includes a second loop antenna 261 and an impedance control circuit 268. The impedance control circuit 268 includes a matching element 262 and a switching unit 263. In the present embodiment, for convenience, the loop antenna 211 described in the first and second embodiments is referred to as a “first loop antenna 211”.

  The second loop antenna 261 has substantially the same shape as the first loop antenna 211, but is slightly smaller in size.

  The switching unit 263 includes a changeover switch 264, a first termination element 265 and a second termination element 266 having different impedances, and one of the first termination element 265 and the second termination element 266 is connected to the second loop. The antenna 261 is selectively connected through the matching element 262. Thereby, the impedance changing circuit 260 indirectly switches the impedance of the first loop antenna 211 between the first value and the second value. The first value is set to be 2 or less or 3 or less, for example, so that the VSWR of the first loop antenna 211 is as close to 1 as possible when the first termination element 265 is connected (ON). Yes. The first value is also a value at which the resonance frequency of the first loop antenna 211 is 13.56 MHz. The second value is set to a value at which the VSWR of the first loop antenna 211 is 5 or more when the second termination element 266 is connected (OFF). The second value is also a value at which the resonance frequency of the first loop antenna 211 is a frequency other than 13.56 MHz. Note that the second value VSWR of 5 is an example, and may be a value larger or smaller than 5 instead of 5. The point is that the resonance frequency of the first loop antenna 211 may be a value that is a frequency other than 13.56 MHz. In addition, the above-mentioned effect | action can be obtained more reliably by making the 2nd value of VSWR into 5 or more.

  FIG. 19 is a diagram illustrating power feeding control and switching control for a plurality of antenna units 210 according to the third embodiment. In the present embodiment, as in the second embodiment, the receiving apparatus 300 supplies power to the plurality of antenna units 210 while switching between the two modes every predetermined time. In this case, in the present embodiment, the switching unit 263 connects the first termination element 265 to the second loop antenna 261 for the antenna unit 210 to be fed. Accordingly, the impedance of the first loop antenna 211 becomes the first value, and the resonance frequency of the first loop antenna 211 becomes 13.56 MHz. On the other hand, when power is not supplied to the antenna unit 210, the switching unit 263 connects the second termination element 266 to the second loop antenna 261. As a result, the impedance of the first loop antenna 211 becomes the second value, and the resonance frequency of the first loop antenna 211 becomes a frequency other than 13.56 MHz.

  The first value may not be a value at which the VSWR of the first loop antenna 211 is completely 1 when the first termination element 265 is connected (ON). In short, it may be a value shifted by, for example, several percent with respect to the first value, which is generally said to be impedance matched. The second value is an impedance value that is generally said to be in a state where impedance matching is not achieved.

  By controlling as described above, it is suppressed that the antenna units 210 are electromagnetically coupled to each other due to the narrow arrangement interval of the antenna units 210 and the detection performance of the IC tag 420 is deteriorated.

  In the present embodiment, the case where two modes are provided has been described. However, for example, when three modes are provided as shown in FIG. 20 and power is supplied to the first antenna unit 210, power is not supplied to the second and third antenna units 210, but power is supplied to the fourth antenna unit 210. In addition, the control unit 230 may control the reader unit 220 so that power is not supplied to the fifth antenna unit 210. At this time, the switching unit 263 may perform similar control corresponding to the control state for the reader unit 220.

  As described above, the measurement mat 200 of the present embodiment includes the impedance changing circuit 260 that changes the impedance of the antenna unit 210 that is not the power supply target among the plurality of antenna units 210.

  Thereby, it is suppressed that the antenna units 210 are electromagnetically coupled to each other due to the narrow arrangement interval of the antenna units 210 and the detection performance of the IC tag 420 is deteriorated.

  Further, in the measurement mat 200 of the present embodiment, the impedance changing circuit 260 includes the impedance of the antenna unit 210 that is not the power supply target so that the VSWR of the antenna unit 210 that is not the power supply target among the plurality of antenna units 210 is equal to or greater than a predetermined value. To change.

  Thereby, it is further suppressed that the antenna units 210 are electromagnetically coupled to each other due to the narrow arrangement interval of the antenna units 210 and the detection performance of the IC tag 420 is deteriorated.

  Further, in the measurement mat 200 of this embodiment, the impedance changing circuit 260 includes a second antenna 261 provided corresponding to each antenna unit 210 and a plurality of different second antennas 261 for terminating the second antenna 261. The first termination element 265 and the second termination element 266, the switching unit 263 that selectively connects the first termination element 265 and the second termination element 266 to the second antenna 261, and the antenna unit 210 that is not a power supply target, A control unit 230 that controls the switching unit 263 so that a termination element that causes the VSWR of the antenna unit 210 to be a predetermined value or higher among the first termination element 265 and the second termination element 266 is connected to the second antenna 261; Is provided.

  Thereby, it can be set as a mismatching state about the antenna part 210 which is not electric power feeding object.

  In the present embodiment, the matching element 262 is provided, but the impedance switching function can be realized without the matching element 262.

(Embodiment 4)
In the present embodiment, in the configuration of the running measurement system of the first embodiment, power is fed in opposite phases to two antenna units arranged adjacent to each other. The two antenna units are arranged side by side in the traveling lane direction.

  FIG. 21 is a diagram illustrating the configuration of the antenna unit according to the fourth embodiment.

  The two antenna units 210a and 210b are the same as the antenna unit 210 described in the first embodiment. However, in the present embodiment, different reference numerals are used for convenience. The two antenna units 210a and 210b are arranged side by side in the traveling lane direction as described above. The matching circuit 212 of the two antenna units 210a and 210b is distributed and fed via the distributor 270. One antenna unit 210b is further fed via a phase shifter 280. The phase shifter 280 shifts the phase by 180 degrees, that is, inverts the phase.

  FIG. 22 is a diagram for explaining a magnetic field when power is supplied to the two antenna units 210a and 210b in opposite phases.

  By feeding power to the two antenna units 210a and 210b in opposite phases, as shown in FIG. 22, the direction of the magnetic field is reversed and a magnetic field directed from one antenna unit 210a to the other antenna unit 210b is generated. . FIG. 22 illustrates the state of the magnetic field at a certain timing. Actually, the magnetic field from the one antenna unit 210a to the other antenna unit 210b and the other antenna unit 210b to the above-mentioned A magnetic field directed to one antenna unit 210a is alternately generated. The magnetic field is substantially horizontal near the center between the two antenna portions 210a and 210b. Here, the direction of the running shoe 400 worn by the runner changes during running. For example, the front-rear direction of the running shoe 400 may be substantially vertical. At this time, the loop axis direction of the loop antenna 421 of the IC tag 420 attached to the running shoe 400 is almost horizontal. Therefore, according to the present embodiment, the loop antenna 421 of the IC tag 420 and the magnetic flux of the magnetic field in the horizontal direction are well linked, and the detection performance of the IC tag 420 is good. On the other hand, when power is supplied to the two antenna units in the same phase, no horizontal magnetic field is generated in the region between the two antenna units. Therefore, when the front-rear direction of the running shoe 400 is substantially vertical as described above, it is difficult to detect the IC tag 420.

  As described above, the measurement mat 200 of the present embodiment is used in a running measurement system that measures the travel time based on the radio signal received from the IC tag 420 worn by the runner. The measurement mat 200 is arranged side by side in a plane, and includes two antenna units 210a and 210b that receive radio signals output from the IC tag 420, and a reader unit 220 that supplies power to the two antenna units 210a and 210b. The reader unit 220 feeds power to the two adjacent antenna units 210a and 210b while switching the antennas to be fed so that they have mutually opposite phases.

  As a result, a substantially horizontal magnetic field is generated near the center between the two antenna portions 210a and 210b. Therefore, it is possible to detect the IC tag satisfactorily even when the front and rear direction of the running shoe 400 is substantially vertical, in other words, even when the loop axis of the loop antenna 421 of the IC tag 420 is horizontal. Become.

In the measurement mat 200 of the present embodiment,
The two antenna portions 210a and 210b are arranged side by side in the traveling lane direction (along the moving direction of the runner (moving body)).

  It is in the traveling lane direction that the front and rear direction of the running shoe 400 is likely to be substantially vertical. Therefore, by arranging the two antenna portions 210a and 210b side by side in the traveling lane direction, it is possible to detect the IC tag worn by the runner satisfactorily.

(Embodiment 5)
In the fifth embodiment, another aspect of the running shoe will be described.

  FIG. 23 is a diagram illustrating a configuration of a running shoe according to the fifth embodiment.

  The running shoe 400B according to the present embodiment includes the second IC tag module 440 not only at the front portion of the bottom surface inside the running shoe 400B but also at the front end portion inside the running shoe 400B. The second IC tag module 440 includes a second IC tag 450 and two rubber sheets 460 that are protected with the second IC tag 450 interposed therebetween. In the present embodiment, for convenience, the IC tag 420 on the front side of the bottom surface inside the running shoe 400B is referred to as a first IC tag 420. The configuration of the second IC tag 450 is the same as that of the first IC tag 420, and the description thereof is omitted.

  The first IC tag 420 provided on the front side of the bottom surface inside the running shoe 400 is arranged so that the loop axis direction of the loop antenna 421 is the vertical direction of the running shoe 400B. On the other hand, the second IC tag 450 provided at the tip is arranged so that the loop axis direction of the loop antenna is the front-rear direction of the running shoe 400B. That is, the first IC tag 420 and the second IC tag 450 are arranged so that their loop axis directions are orthogonal to each other.

  According to the running shoe 400B according to the present embodiment, the IC tag can be easily detected by the measurement mat 200 even when the front and rear direction of the running shoe 400B is inclined in any direction between the horizontal direction and the vertical direction.

  As described above, the running shoe 400B of the present embodiment includes the first IC tag 420 and the second IC tag 450 as the IC tag 420, and the first IC tag 420 has a loop axis direction of the loop antenna 421 corresponding to the running shoe 400B. The second IC tag 450 is disposed such that the loop axis direction of the loop antenna 421 is the front-rear direction of the running shoe 400B.

  Thereby, even when the front-rear direction of the running shoe 400 is inclined in any direction between the horizontal direction and the vertical direction, the measurement mat 200 makes it easy to detect the IC tag.

(Embodiment 6)
In the sixth embodiment, a case where an IC tag 420 is provided inside a shoe insole instead of the running shoe 400 will be described.

  FIG. 24 is a diagram illustrating a configuration of a shoe insole according to the sixth embodiment.

  The insole 800 for shoes according to this embodiment includes an IC tag 420 on the front side. The IC tag 420 is the same as in the first to third embodiments. The IC tag 420 is built in the main body member 810 of the shoe insole 800. The IC tag 420 is arranged such that the loop axis direction of the loop antenna 421 is the vertical direction of the insole 800 for shoes. Therefore, when the shoe insole 800 is attached to the shoe, the loop axis direction of the loop antenna 421 is the vertical direction of the shoe insole 800.

  According to the shoe insole 800 according to the present embodiment, the shoe can be easily used as a shoe for the running measurement system simply by inserting the shoe insole 800 into a general shoe not for running.

  As described above, the shoe insole 800 according to the present embodiment is a shoe insole 800 used in combination with the measurement mat 200 including the antenna unit 210 capable of transmitting and receiving a radio signal to and from the IC tag 420. The IC tag 420 is disposed on the front side of the insole 800 for shoes.

  Thus, when the runner passes over the measurement mat 200, the IC tag 420 passes through a position close to the measurement mat 200 in the entire shoe. Therefore, the detection of the IC tag 420 by the measurement mat 200 is good.

(Embodiment 7)
In the first embodiment, when the computer 500 receives a signal indicating the start from the electronic pistol 100 via the receiving device 300, the measurement of the travel time is started. However, there may be a case where the radio signal of the specific low power radio cannot be received by the receiving apparatus 300 due to interference with other radio signals and noise. In this case, the signal indicating the start may be retransmitted by the retransmission control, but the measurement start timing is delayed from the actual start timing. On the other hand, when the signal indicating the goal from the measurement mat 200 is received by the computer 500 through the receiving device 300 at one time without being retransmitted, for example, the measured travel time is shorter than the actual travel time. Become. The present embodiment adopts the following configuration for the purpose of solving this problem.

Specifically, in the present embodiment, the electronic pistol 100 transmits, as a radio signal output when the trigger 101 is pulled, a radio signal including information indicating the number of retransmissions of the information in addition to information indicating the start. . The computer 500 corrects the measured traveling time based on Equation 3.
(Formula 3)
To = A + B × N + T
Here, To is the corrected measurement time, T is the actual measurement time, N is the number of retransmissions of the signal indicating the start, and A is the time from when the radio signal indicating the first start is output until the retransmission is started ( (Constant) and B are retransmission interval time (constant).

  As described above, in this embodiment, the electronic pistol 100 retransmits the radio signal generated when the trigger 101 is operated until a response indicating that the radio signal is received from the receiving device 300 is received. The measurement time is corrected based on the number of retransmissions.

  By performing the correction in this way, it is possible to obtain an accurate measurement time even if retransmission control is performed by performing the correction.

(Embodiment 8)
In the eighth embodiment, the following configuration is adopted in order to cope with the same problem as in the seventh embodiment.

Specifically, in this embodiment, the electronic pistol 100 transmits a signal indicating the first start in addition to information indicating the start as a radio signal output when the trigger 101 is pulled until the retransmission. A radio signal including information indicating the time Ti is transmitted. The computer 500 corrects the measured travel time based on Equation 4.
(Formula 4)
To = A + Ti + T
Here, To is the corrected measurement time, T is the actual measurement time, Ti is the time from the transmission of the signal indicating the first start to the retransmission, and A is the radio signal indicating the first start. This is the time (constant) from the start to retransmission.

  As described above, in this embodiment, the electronic pistol 100 retransmits the radio signal generated when the trigger 101 is operated until a response indicating that the radio signal is received from the receiving device 300 is received. The measurement time is corrected based on the time from when the wireless signal is first output to when the wireless signal that has received a response indicating that the wireless signal has been received from the receiving apparatus 300 is output.

  By performing the correction in this way, it is possible to obtain an accurate measurement time even when retransmission control is performed.

(Embodiment 9)
In the ninth embodiment, the following configuration is adopted in order to cope with the same problem as in the seventh embodiment.

  In the ninth embodiment, in addition to the configuration of the running measurement system of the first embodiment, the control unit 103 of the electronic pistol 100 and the control unit 230 of the measurement mat 200 each have a clock unit. The running measurement system operates as follows.

  That is, when the trigger 101 of the electronic pistol 100 is pulled, the electronic pistol 100 outputs a radio signal including information for instructing start and information on the start time. When receiving apparatus 300 receives this radio signal, it converts the signal into a predetermined format and outputs it to computer 500. When the runner passes the measurement mat 200, the measurement mat 200 outputs a radio signal including information indicating a goal and goal time information for each runner (IC tag). When receiving apparatus 300 receives this radio signal, it converts the signal into a predetermined format and outputs it to computer 500. The computer 500 calculates a running time for each runner (IC tag) based on the start time information and the goal time information. Then, the computer 500 generates display image data indicating the result of the race, and outputs the display image data to the display device 600. The display device 600 displays an image based on display image data. The clock unit of the control unit 103 of the electronic pistol 100 and the clock unit of the control unit 230 of the measurement mat 200 synchronize time by a predetermined method. Various synchronization methods known in the art can be applied to the synchronization between the clock parts.

  According to the present embodiment, the travel time is obtained based on the information on the start time and the goal time output from the electronic pistol and the measurement mat 200. Therefore, accurate measurement time can be obtained even when retransmission control is performed.

(Embodiment 10)
In the first embodiment, a radio signal generated by the electronic pistol 100 is received by the receiving device 300. In the present embodiment, a radio signal generated by the electronic pistol 100 is received by the measurement mat 200. Hereinafter, a configuration for that purpose will be described. In addition, the description about the same thing as Embodiment 1 is abbreviate | omitted suitably. Further, the contents shown in FIGS. 3 to 14 of the first embodiment can be directly applied to the present embodiment.

  FIG. 25 is a diagram illustrating an outline of a running measurement system according to the tenth embodiment. FIG. 26 is a diagram illustrating a configuration of a running measurement system according to the tenth embodiment. As shown in these drawings, in this embodiment, a radio signal generated by the electronic pistol 100 is received by the measurement mat 200.

  Specifically, as illustrated in FIG. 9, the radio unit 240 of the mat control unit 205 of the measurement mat 200 receives the radio signal output from the electronic pistol 100 via the antenna unit 250.

  When the radio unit 240 receives a start signal from the electronic pistol 100, the control unit 230 of the measurement mat 200 transfers the signal to the receiving device 300 via the radio unit 240 and the antenna 250.

  The operation of the running measurement system of this embodiment will be described. In the running measurement system, when the trigger 101 of the electronic pistol 100 is pulled, the electronic pistol 100 outputs a radio signal instructing start. When the measurement mat 200 receives the wireless signal, the measurement mat 200 transfers the wireless signal to the reception device 300. When receiving this signal, the receiving apparatus 300 converts the signal into a signal in a predetermined format and outputs the signal to the computer 500. Upon receiving this signal, the computer 500 starts measuring the travel time. When the runner passes the measurement mat 200, the measurement mat 200 outputs a radio signal indicating a goal for each runner (IC tag). When receiving apparatus 300 receives this radio signal, it converts the signal into a predetermined format and outputs it to computer 500. When receiving a signal in a predetermined format, the computer 500 stops measuring the travel time. The computer 500 obtains the running time for each runner based on the signal indicating the measurement result, generates display image data indicating the result of the race, and outputs the display image data to the display device 600. The display device 600 displays an image based on display image data.

  According to the present embodiment, another aspect related to reception of a radio signal generated by the electronic pistol 100 is provided.

  In addition, in this embodiment, the structure of Embodiment 2-9 can also be applied. In this case, the radio signal generated by the electronic pistol 100 may be received by the measurement mat 200 instead of the receiving device 300. Thereby, in this embodiment, the effect demonstrated in Embodiment 2-9 can also be acquired.

(Embodiment 11)
In each of the above embodiments, the travel time is measured by the computer 500. In the present embodiment, the travel time is measured by the measurement mat 200. The control unit 230 of the mat control unit 205 of the measurement mat 200 has a clock unit, and the travel time is measured by the control unit 230 based on the measurement result of the clock unit. Other configurations are the same as those in the above embodiments. Hereinafter, the operation will be described.

  When the trigger 101 of the electronic pistol 100 is pulled, the electronic pistol 100 outputs a radio signal instructing start. The measurement mat 200 starts measuring the travel time at the timing when the radio signal is received. When the runner passes over the measurement mat 200, the measurement mat 200 stops measuring the running time for each runner. Then, the measurement mat 200 transmits a signal indicating the measurement result to the reception device 300, and the reception device 300 converts the signal indicating the measurement result into a signal in a predetermined format and outputs the signal to the computer 500. The computer 500 generates display image data indicating the result of the race based on a signal indicating the measurement result, and outputs the display image data to the display device 600. The display device 600 displays an image based on display image data.

  In addition, in this embodiment, the structure of Embodiment 2-9 can also be applied. In this case, the radio signal generated by the electronic pistol 100 may be received by the measurement mat 200 instead of the receiving device 300. Thereby, in this embodiment, the effect demonstrated in Embodiment 2-9 can also be acquired.

(Other embodiments)
In the embodiment, the electronic pistol 100 includes the flying switch 106 and the sound generator 107. However, the electronic pistol 100 may not include the flying switch 106 and the sound generator 107.

  In the embodiment, in the measurement mat 200, the reader unit 220 is provided in the mat control unit 205. However, the reader unit may be provided in each antenna unit.

  In the embodiment, the control unit 302 of the receiving device 300 performs communication control between specific low power wireless devices. However, this communication control function may be provided in the electronic pistol 100 or the measurement mat 200.

  In the embodiment, the example in which the antenna units 210 are provided in two rows has been described. However, it may be one row or three or more rows.

  In the fourth embodiment, a phase shifter is provided to invert the phase. However, the phase can also be reversed by disposing one of the two antenna portions and inverting them without providing a phase shifter.

  In the first embodiment, the measurement mat 200 is arranged so that the middle position of the two rows of antenna units 210 coincides with the goal line. Then, the computer 500 corrects the measured time based on the column to which the antenna unit 210 that has received the wireless signal belongs. However, an intermediate position between the two rows of antenna units 210 may not coincide with the goal line. In this case, the computer 500 may correct the measured time according to the distance between each of the two rows of antenna units 210 and the goal line. Further, when the antenna units 210 are provided in three or more rows, the antenna units 210 may be appropriately disposed near the goal line and the time may be corrected by the computer 500.

  In each of the above-described embodiments, the running measurement system and the measurement mat that measure the running time of the runner as the moving body have been described. However, the running measurement system and the measurement mat of the present embodiment can also be used when the moving body is an automobile, a bicycle, a forklift, or the like. That is, the running measurement system and the measurement mat of the present embodiment can be used as a detection system and a detection device for detecting the moving time of a moving body such as an automobile, a bicycle, and a forklift.

DESCRIPTION OF SYMBOLS 100 Electronic pistol 101 Trigger 102 Sensor 103 Control part 104 Radio | wireless part 105 Antenna 106 Flying switch 107 Sound generation part 200 Measurement mat 201 Sheet part 205 Radio | wireless part 210 Antenna part 210a, 210b Antenna part 211 Loop antenna (1st loop antenna)
212 matching circuit 220 reader unit 230 control unit 240 radio unit 250 antenna 260 impedance change circuit 261 second loop antenna 262 matching element 263 switching unit 264 changeover switch 265 first termination element 266 second termination element 270 distributor 280 phaser 300 reception Device 301 Wireless section 302 Control section 303 External interface 400 Running shoes 400B Running shoes 410 IC tag module 420 IC tag 421 Loop antenna 422 Wireless circuit 423 Power supply circuit 424 CPU
425 Memory 430 Rubber sheet 440 Second IC tag module 450 Second IC tag 460 Rubber sheet 500 Computer 501 CPU
502 Memory 503 HDD
504 USB interface 505 Network interface 506 Display interface 600 Display device 700 Server 800 Shoe insole 810 Main body

Claims (6)

A detection device that detects the moving body based on a radio signal received from an IC tag attached to the moving body,
A plurality of antennas for receiving radio signals output from the IC tag;
A power feeding unit that feeds power to the plurality of antennas;
With
The power feeding unit feeds power while switching an antenna to be fed so that adjacent antennas have opposite phases to each other,
Detection device. The plurality of antennas are arranged side by side along the moving direction of the moving body.
The detection device according to claim 1. The moving body is a human body;
The IC tag is attached to the shoe of the human body,
The detection device according to claim 1 or 2. A runner detection mat used in a running measurement system that measures a running time based on a radio signal received from an IC tag worn by a runner,
Two antennas arranged side by side in a plane,
A power feeding unit that feeds power to the two antennas,
Prepared,
The power feeding unit feeds power to the two antennas so as to have opposite phases.
Runner detection mat. The two antennas are arranged side by side in the traveling lane direction.
The runner detection mat according to claim 4. The IC tag is attached to a runner's shoes,
The runner detection mat according to claim 4 or 5.

Images