JP4707600B2 - Competition measurement system and time acquisition method - Google Patents

Description

  The present invention relates to a competition measurement system and a time acquisition method that can appropriately acquire the competition time of each athlete while reducing the amount of data transmission.

In recent years, in marathon competitions, attempts have been made to measure (clock) the goal time of each individual athlete. For example, a measurement system that measures a competitor's individual goal time based on the time when a barcode was printed on a competitor's race bib and the reader's barcode was read by a reader has been put into practical use. Yes.
Recently, in order to be able to measure the competition time including the passing time at each timing point, an attempt has been made to measure the competition time of each athlete without contact. For example, a measurement system for measuring a competition time has been developed based on information sent from the tag transmitter by allowing a player to hold a tag transmitter, and an operation test for practical use has been attempted.

Specifically, in the measurement system for competitions, a wireless tag that keeps the running time on its own is held by the athlete, and a trigger signal is transmitted from the trigger signal generator to the measurement zone at the timing point. When the player who runs the measurement zone runs, the wireless tag responding to the trigger signal specifies the measurement time (competition time) based on the running time at that time. And the technique which counts each competitor's time by a radio | wireless tag transmitting this measurement time etc. to a measurement time receiver is disclosed (for example, refer patent document 1).
Japanese Patent Laying-Open No. 2005-300256 (pages 7-15, FIG. 10)

In the competition measurement system described in Patent Document 1 described above, even when a large number of athletes reach the measurement zone at the same time, individual wireless tags transmit measurement times at different response timings (response time slots). Therefore, anti-collision is realized.
Still, the response time slot itself is defined according to the standard data amount including all measurement times (hours, minutes, seconds, etc.), and the number of wireless tags that can be transmitted within a certain time is limited. Therefore, when the number of competitors increased, it took a certain amount of time to finish the time counting.

  Therefore, there has been a demand for a technique that can increase the number of wireless tags that can be transmitted within a certain period of time and can further reduce the time required for time counting.

  The present invention has been made in view of the above circumstances, and provides a measurement system for competition and a time acquisition method that can appropriately acquire the competition time of each athlete while reducing the amount of data transmission. With the goal.

In order to achieve the above object, a measurement system for competition according to the first aspect of the present invention is:
A measurement system for competition, including a wireless device carried by the athlete, and a receiving device that receives time information from the wireless device,
The wireless device includes
A time measuring means for measuring the first reference time;
Electromagnetic field detection means for detecting an electromagnetic field generated on the runway on which the athlete runs,
A time point detecting means for detecting a predetermined time point based on the detected electromagnetic field;
Time measuring means for measuring the first reference time measured by the time measuring means as a competition time when the time measurement point is detected;
Time information transmission means for transmitting time information including a part of the measured competition time to the receiving device is provided,
The receiving device includes
Time information receiving means for receiving the time information transmitted from the wireless device;
Receiving side timing means for timing the second reference time;
There is provided time restoration means for restoring the competition time measured by the wireless device based on the relationship between the received time information and the second reference time measured by the reception side timing means. Yes,
It is characterized by that.

According to this invention, in the wireless device, the time measuring means measures the first reference time (for example, running time). The electromagnetic field detection means detects an electromagnetic field generated on the runway on which the athlete runs. The time point detecting means detects a predetermined time point (for example, a time line) based on the detected electromagnetic field. The time measuring means measures the first reference time measured by the time measuring means as the competition time when the time measuring point is detected. Then, the time information transmitting means transmits time information including a part of the measured competition time (for example, a value from 1 second to 1/100 second) toward the receiving side device.
On the other hand, in the receiving side device, the time information receiving means receives the time information transmitted from the wireless device. The receiving side time measuring means measures the second reference time. Then, the time restoration means restores the competition time measured by the wireless device based on the relationship between the received time information and the second reference time measured by the reception time measuring means.
As a result, it is possible to appropriately acquire the competition time of each athlete while reducing the data transmission amount.

The time information transmitting means of the wireless device transmits the time information including a value up to a predetermined digit less than or equal to a second of the measured competition time to the receiving side device,
The time restoration unit of the reception side device is configured to measure the time measurement of the wireless device based on a comparison result between at least the second of the time information and the second reference time measured by the reception side timing unit. The competition time measured by the means may be restored.

The time information transmission means of the wireless device sends the time information including a flag indicating an odd / even second of the measured competition time and a value up to a predetermined digit of 1/10 second or less to the receiving side device. Send
The time restoring means of the receiving side device is based on a comparison result between at least the odd / even shown by the flag of the time information and the odd / even of the second reference time measured by the receiving side timing means, The competition time measured by the wireless device may be restored.

  The time restoration means of the receiving side device, when at least the odd / even shown in the flag of the time information does not match the odd / even of the second of the first reference time measured by the receiving time measuring means, The competition time measured by the wireless device may be restored on the basis of the second value of the second reference time measured by the reception side time measuring means.

The receiving device further includes transmission means for transmitting time information including a part of the second reference time measured by the receiving time measuring means to the wireless device,
The wireless device corrects the first reference time measured by the time measuring means based on the receiving means for receiving the time information sent from the transmitting means and the time information received by the receiving means. Correction means may be further provided.

In order to achieve the above object, a time acquisition method according to the second aspect of the present invention includes:
A time acquisition method in a system including a wireless device carried by a player and a receiving side device that receives time information from the wireless device,
In the wireless device, a time measuring step for measuring a first reference time;
In the wireless device, an electromagnetic field detection step of detecting an electromagnetic field generated on a runway on which the athlete runs,
In the wireless device, based on the electromagnetic field detected in the electromagnetic field detection step, a timing point detection step for detecting a predetermined timing point;
In the wireless device, when the timing point is detected in the timing point detection step, a time measurement step of measuring the first reference time measured in the timing step as a competition time;
In the wireless device, the time information transmission step of transmitting the time information including a part of the competition time measured in the time measurement step to the reception side device;
In the receiving device, a time information receiving step for receiving the time information transmitted in the time information transmitting step of the wireless device;
In the reception side device, a reception side time measuring step of measuring a second reference time;
In the receiving side device, based on the relationship between the time information received in the time information receiving step and the second reference time measured in the receiving side timing step, the time measuring step of the wireless device A time restoration step for restoring the competition time measured at
It is characterized by providing.

According to the present invention, in the wireless device, the time measuring step measures the first reference time (for example, running time). Moreover, an electromagnetic field detection step detects the electromagnetic field produced | generated on the runway which a player runs. The time point detection step detects a predetermined time point (for example, a time line) based on the electromagnetic field detected in the electromagnetic field detection step. The time measuring step measures the time measured in the time measuring step as the competition time when the time measuring point is detected in the time measuring point detecting step. In the time information transmission step, time information including a part of the competition time measured in the time measurement step is transmitted to the reception side device.
On the other hand, in the receiving side device, the time information receiving step receives the time information transmitted in the time information transmitting step of the wireless device. In the reception side timing step, the reception side device measures the second reference time. Then, the time restoration step includes the time measurement step of the wireless device based on the relationship between the received time information and the second reference time measured in the reception side timing step in the reception side device. The competition time measured at is restored.
As a result, it is possible to appropriately acquire the competition time of each athlete while reducing the data transmission amount.

  According to the present invention, it is possible to appropriately acquire the competition time of each athlete while reducing the data transmission amount.

  A game timing system according to an embodiment of the present invention will be described below with reference to the drawings. As an example, a competition timing system that is applied to marathon competitions and that measures competition time at a plurality of points will be described.

(Embodiment 1)
FIG. 1 is a schematic diagram showing an example of a configuration of a game timing system applied to the embodiment of the present invention. In the following description, the relay points and goal points for time measurement will be collectively described as time points for convenience. That is, the time point indicates a relay point or a goal point.

As shown in the figure, the timing system for competition includes a modulated magnetic field generator 10 installed at a start point, a loop coil 11, a timer device 30, a transmission control box 40, a transmitter 41, a time synchronization console 50, a time point (relay). Modulation magnetic field generator 10, antenna 11, magnetic field generator 20, loop coil 21, timer device 30, transmission control box 40, transmitter 41, time synchronization console 50, and receiver device installed at the point or goal point) A reception control box 60, a receiver 61, a processing device 70, and a wireless tag 80 as a wireless device carried by each player RN are configured.
That is, the modulated magnetic field generator 10, the loop coil 11, the timer device 30, the transmission control box 40, the transmitter 41, and the time synchronization console 50 are installed at both points, respectively, while the magnetic field generator 20, the loop coil 21 are provided. The reception control box 60, the receiver 61, and the processing device 70 are installed only at the time point.

The modulated magnetic field generator 10 is disposed along the road, for example, and generates an electromagnetic field on the loop coil 11. Specifically, the modulation magnetic field generator 10 includes a sine wave generation circuit that generates a sine wave synchronized with a predetermined frequency, a modulation circuit that modulates the sine wave by a predetermined method in accordance with a barrier number (unique identification information) to be transmitted, And a power amplifier circuit that amplifies the modulated signal (modulated signal) and supplies the amplified signal to the loop coil 11.
In addition, the modulated magnetic field generator 10 arrange | positioned at a start point and a time-measurement point has the barrier number which shows each arrangement | positioning point.

The loop coil 11 is a coil formed in a substantially square shape, and is appropriately arranged on the runway on which the player RN runs. In addition, the loop coil 11 arrange | positioned at a timing point is arrange | positioned on the runway before a loop coil 21 (time-measurement point).
As an example, as shown in FIG. 2A, the loop coil 11 is parallel with a straight line b extending in a direction orthogonal to the running direction of the player RN (the direction of arrow A in FIG. 2B) as a center line. A substantially rectangular (rectangular) shape is formed along the straight lines a and c separated from each other by a predetermined distance. And it forms so that it may have the feeding point s on one side, and a current flows from this feeding point s in the direction of the arrow.
When the modulation signal is supplied from the modulation magnetic field generator 10 through the feeding point s, the loop coil 11 generates a modulated AC electromagnetic field on the coil. Specifically, an electromagnetic field as shown in FIG. 2B is generated. A barrier number modulated by an amplitude modulation method such as OOK (On-Off-Keying) is superimposed on this electromagnetic field. When the player RN passes over the loop coil 11 at the arrangement point, the wireless tag 80 receives the gateway number of the arrangement point.

In the electromagnetic field as shown in FIG. 2B, the detection direction of the electromagnetic field (direction perpendicular to the detection coil surface D) is perpendicular to the runway (that is, the detection coil surface D is parallel to the runway). When the arranged electromagnetic field detection coil C (an LF antenna 81 of the wireless tag 80 described later) moves in the direction of arrow B, an electromagnetic field intensity distribution as shown in FIG. In other words, the electromagnetic field detection coil C detects the magnetic field strength distribution as shown in FIG. 2C where the electromagnetic field strength increases because the magnetic flux in the direction perpendicular to the runway is captured by the coil surface D. .
When the wireless tag 80 detects such an electromagnetic field, the wireless tag 80 shifts to a time synchronization mode as described later, and receives time distribution from the transmitter 41 to perform time synchronization.

  Returning to FIG. 1, the magnetic field generator 20 installed at the timing point is disposed, for example, along the road and generates an electromagnetic field on the loop coil 21. Specifically, the magnetic field generator 20 includes a sine wave generation circuit that generates a sine wave synchronized with a predetermined frequency, and a power amplification circuit that amplifies the generated sine wave and supplies the sine wave to the loop coil 21. .

The loop coil 21 installed at the timing point is a coil formed in a substantially “8” shape, and is appropriately arranged at the timing point on the runway.
As an example, as shown in FIG. 3A, the loop coil 21 is formed in an 8-character shape in which two rectangular (rectangular) coil portions are connected in the running direction (arrow A direction) of the player RN. ing. More specifically, the loop coil 21 is wound in the forward direction of the figure 8, and is formed so as to have a feeding point s at the center (middle point) of the figure 8, that is, at the intersection, and passes through the feeding point s. The upper and lower portions of the figure 8 are formed along the straight lines a and b that are substantially parallel to each other with a predetermined distance, with the straight line b extending in the direction orthogonal to the running direction of the player RN as the center line. The loop coil 21 is arranged so that the straight line b overlaps with a time line L shown in FIG. 1 for measuring time.

The loop coil 21 is configured such that a current flows in the direction of the arrow from the feeding point s in FIG. 3A. When a sine wave is supplied from the magnetic field generator 20, an alternating electromagnetic field is generated on the coil. . Specifically, as shown in FIG. 3B, the first electromagnetic field 210a is generated on one coil part, and the player RN runs on the other coil part with respect to the first electromagnetic field 210a. A second electromagnetic field 210b that is adjacent to the direction (direction of arrow A) and that cancels the electromagnetic force with the first electromagnetic field 210a is generated.
That is, the electromagnetic field strength of the electromagnetic field on the straight line b is extremely smaller than the electromagnetic field strength on both sides of the first electromagnetic field 210a and the second electromagnetic field 210b due to the cancellation of the magnetic force of the electromagnetic field (for example, the electromagnetic field). The field strength is “0”).

In the electromagnetic field as shown in FIG. 3B, the electromagnetic field detection direction (direction perpendicular to the detection coil surface D) is perpendicular to the travel path (that is, the detection coil surface D is parallel to the travel path). When the electromagnetic field detection coil C (LF antenna 81 of the wireless tag 80 described later) moves in the direction of arrow B, an electromagnetic field intensity distribution as shown in FIG. That is, since the electromagnetic field detection coil C captures the magnetic flux in the direction perpendicular to the running path at the coil surface D, the electromagnetic field strength is extremely small (for example, the electromagnetic field strength is “0”). An electromagnetic field intensity distribution as shown in (c) is detected.
For this reason, when the player RN passes over the loop coil 21 along the direction of the arrow B, the wireless tag 80 has the first electromagnetic field 210a and the second electromagnetic field on the timing line L (on the straight line b). It can be detected as an inflection point (trigger point described later) of the electromagnetic field between 210b.

Returning to FIG. 1, each timer device 30 measures the running time that is the reference time in the competition. As an example, each timer device 30 counts down to the scheduled start time of the competition and up-counts the running time from the scheduled start time.
For example, all the timer devices 30 are collected at the start point before the start of the competition, and as shown in FIG. 4A, each timer device 30 is connected by the cable CB, and the down-counting is started at the same time. That is, the down-count start signal is supplied from the grip switch GS at an appropriate timing in consideration of the set time while setting the down-count time (remaining time). As a result, each timer device 30 starts down-counting synchronously and measures the synchronized running time from the scheduled start time.
In addition, a standard time obtained from a GPS (Global Positioning System) satellite or the like may be measured in common.
For example, as shown in FIG. 4B, the timer device 30 to which the standard time receiver KJ is connected and the other timer device 30 are connected by the cable CB, and the time measurement of the standard time is started in common.

As described above, after the time (running time, etc.) synchronized with each timer device 30 is started, the timer device 30 arranged at the time point is appropriately transported.
Thereafter, when the game is started and a start signal is supplied to the timer device 30 connected to the start pistol SP, the timer device 30 obtains a time difference between the start time and the running time, that is, a difference. When this difference is input to the timer device 30 carried to the timing point, the synchronized running time is counted at the timing point because the time difference is eliminated.
In addition, the input of such a difference shall be completed, for example, before the player RN reaches the first timing point.

  Returning to FIG. 1, the transmission control box 40 is connected to the timer device 30, and transmits the running time to the wireless tag 80 of the player RN who has moved in the vicinity via the transmitter 41. That is, time distribution is performed on the above-described loop coil 11 toward the wireless tag 80 that has shifted to the time synchronization mode.

The transmitter 41 is controlled by the transmission control box 40 and transmits time information for synchronization. That is, time distribution is performed toward the wireless tag 80.
Specifically, the transmitter 41 at the start point transmits time information in the time distribution format shown in FIG. That is, time information of a total of 16 bytes including the hour, minute, second (HH: MM: SS) and other information of the running time is transmitted to the wireless tag 80 to start timing.
Similarly, the transmitter 41 at the first timing point also transmits time information in the time distribution format shown in FIG. That is, since the difference is input and the running time of each timer device 30 is synchronized at the start, it is necessary to reset the running time to the wireless tag 80.
That is, the transmitter 41 at the first timing point, for example, as shown in FIG. 5 (b), is at the time of the running time at the exact second (second exactly, that is, n seconds 00) measured by the timer device 30. Send time information including minutes, seconds.
When this time information is received, the wireless tag 80 resets the running time to the timekeeping unit, and starts measuring the accurate running time synchronized with each timer device 30.

On the other hand, the transmitter 41 at the subsequent time point transmits time information in the time distribution format shown in FIG. That is, a total of 12 bytes of time information including the running time seconds (SS) and other information is transmitted.
That is, the transmitter 41 at the time point as the transmission means transmits time information including a part of the running time at the exact second timing timed by the timer device 30 as shown in FIG. 5D, for example. To do.
In other words, since the wireless tag 80 has already started to measure the running time, it is possible to appropriately correct its own running time only by acquiring information on the seconds counted by the timer device 30.
Details of the correction of the self running time in the wireless tag 80 will be described later.

  Returning to FIG. 1, the time synchronization console 50 is a console terminal that controls the transmission control box 40 and displays the operation status of the transmission control box 40, etc. used.

The reception control box 60 arranged at the timing point is connected to the timer device 30 and receives time information sent from the wireless tag 80 via the receiver 61. That is, the time information is received from the wireless tag 80 of the player RN who has passed the time measuring line L on the loop coil 21 described above.
As will be described later, since the time information includes only a part of the competition time (a value from seconds to 1/100 seconds, that is, SS.tt), the reception control box 60 includes a timer. The competition time is appropriately restored with reference to the running time counted by the device 30.

  The receiver 61 is arranged in the vicinity of the loop coil 21 and the like, and when receiving time information sent from the wireless tag 80, supplies the time information to the reception control box 60.

  The processing device 70 collects the competition time of each competitor RN through the reception control box 60. For example, each competition time restored by the reception control box 60 is acquired and stored in association with the target tag ID (ID of the wireless tag 80).

On the other hand, the wireless tag 80 carried (held) by the athlete RN moves on the runway with the athlete RN after the start of the competition, and passes through several timing points on the way from the starting point to the last timing point ( Reach the goal).
At this time, the wireless tag 80 detects the electromagnetic field generated on the loop coil 11 and shifts to the time synchronization mode, detects the inflection point of the electromagnetic field generated on the loop coil 21, and The competition time is identified from the running time. The wireless tag 80 generates time information including a part of the competition time and transmits the time information to the receiver 61.
In addition, the time measured (specified) at each time point is appropriately stored so that it can be read out after the competition.

  As an example, as shown in FIG. 6, the wireless tag 80 includes an LF antenna 81, an amplification circuit 82, a detection circuit 83 as an electromagnetic field detection unit and a time point detection unit, a control unit 84 as a time measurement unit, A time measuring unit 85 as a time measuring unit, a storage unit 86, and a communication circuit 87 as a time information transmitting unit are configured.

An LF (Low Frequency) antenna 81 detects an electromagnetic field generated from the loop coil 11 and the loop coil 21 described above. That is, an electromagnetic field (with modulation) generated on the loop coil 11 by the modulated magnetic field generator 10 or an electromagnetic field (without modulation) generated on the loop coil 21 by the magnetic field generator 20 is detected.
The LF antenna 81 supplies a detection signal indicating the detected electromagnetic field intensity to the amplifier circuit 82.

  The amplification circuit 82 appropriately amplifies the detection signal supplied from the LF antenna 81 and supplies the amplified detection signal to the detection circuit 83.

The detection circuit 83 detects the arrival on the loop coils 11, 21 according to the detection signal supplied from the amplification circuit 82, and further detects the inflection point of the electromagnetic field on the loop coil 21.
On the loop coil 11, as shown in FIG. 7A, the detection circuit 83 sets the detection output to “HI” when the electromagnetic field intensity of the electromagnetic field received by the LF antenna is equal to or higher than the threshold value, and the electromagnetic field strength is equal to or lower than the threshold value. Then, the detection output is set to “LO”. The detection circuit 83 also detects the presence or absence of modulation. That is, once the combination of “HI” and “LO” appears at the modulation speed from the state of “HI” and this pulse train can be detected, the detection circuit 83 detects that the wireless tag 80 (competitor RN) is placed on the loop coil 11. It will detect that it has arrived.
When it is detected that the detection circuit 83 has reached the loop coil 11 (when modulation is detected from the state of “HI”), the gateway number (the serial number of the timing point) is demodulated and acquired by a demodulation circuit (not shown). . That is, the gateway number superimposed on the electromagnetic field generated on the loop coil 11 is received.
On the other hand, on the loop coil 21, as shown in FIG. 7B, the detection circuit 83 detects a detection output when the electromagnetic field strengths of the first electromagnetic field 210a and the second electromagnetic field 210b sequentially received by the LF antenna become equal to or higher than a threshold value. Is “HI”. Since the electromagnetic field generated by the loop coil 21 is not modulated, the state of “HI” at the first time continues for a predetermined period or longer, and the detection circuit 83 detects that there is no modulation. The detection circuit 83 detects that the wireless tag 80 has reached the loop coil 21 when there is no modulation. Thus, the detection circuit 83 detects the second electromagnetic field 210b and detects the state of “HI” for the second time as an inflection point of the electromagnetic field. That is, the state of “HI” in the second time shown in FIG. 7B is specified as the trigger point on the loop coil 21.

Returning to FIG. 6, the control unit 84 controls the entire wireless tag 80. For example, when the communication circuit 87 receives the set time information (running time hour, minute, second) at the start point and the first time point, the running time is set to the time counted by the time measuring unit 85. On the other hand, when the communication circuit 87 receives the correction time information (second of running time) at the second and subsequent timing points, the time measured by the time measuring unit 85 is appropriately corrected so as to synchronize with the running time.
Moreover, the control part 85 specifies the time (running time) which the time measuring part 85 measures as the competition time at the timing when the detection circuit 83 detects the inflection point of the electromagnetic field on the loop coil 21. In other words, the competition time is measured. The measured competition time is sequentially stored in the storage unit 86.

The time measuring unit 85 measures the time synchronized with the running time based on the time information received by the communication circuit 87.
Note that the time measuring unit 85 includes a highly stable crystal oscillator, and is capable of maintaining the time measurement after synchronization to a certain degree of stability.

The storage unit 86 is composed of, for example, a non-volatile memory, and stores timekeeping time and the like.
The storage unit 86 is provided with storage areas corresponding to at least the number of time points, and the competition time and the like timed at each time point can be stored in the respective memory areas.
In addition, the memory | storage part 86 has memorize | stored beforehand the specific identification information (tag ID) etc. which differ for every radio | wireless tag 80 (each player RN) etc. in the separate area, for example.

The communication circuit 87 receives time information transmitted from the transmitter 41 described above via a predetermined communication antenna.
The communication circuit 87 generates time information using a part of the competition time measured by the control unit 84 and transmits the time information to the receiver 61 described above.
Specifically, the communication circuit 87 generates time information in the format shown in FIG. That is, a total of 18 bytes of time information including a value from the second of the competition time to 1/100 second (that is, SS.tt) and other information is transmitted. As shown in FIG. 8B, when all the competition time (that is, HH: MM: SS.tt) is sent, a total of 22 bytes are required. With time information, the amount of data can be reduced to about 20%.

  Even when a part of the competition time (time information) is transmitted, as shown in FIG. 8C, the wireless tag 80 side and the timer device 30 measure the synchronized running time. Therefore, the competition time can be properly restored on the reception side (reception control box 60).

Hereinafter, the operation of the competition measurement system having such a configuration will be described with reference to FIGS. 9 and 10. FIG. 9 is a flowchart for explaining the time measurement process executed by the wireless tag 80, and FIG. 10 is a flowchart for explaining the time restoration process executed by the reception control box 60.
First, the time measurement process of FIG. 9 will be described.

  First, the wireless tag 80 stands by until an electromagnetic field is detected (step S10). That is, the radio tag 80 performs the subsequent processing until the traveling player RN reaches the loop coil 11 or the loop coil 21 and the detection circuit 83 detects the electromagnetic field generated on the loop coils 11 and 21. Wait.

  When the wireless tag 80 detects the electromagnetic field, it determines whether or not there is modulation (step S11). That is, the detection circuit 83 determines whether or not the detected electromagnetic field is modulated. When the electromagnetic field is modulated, it is determined that it has reached the loop coil 11, and conversely, when the electromagnetic field is not modulated, it is determined that it has reached the loop coil 21.

  When it is determined that the electromagnetic field is modulated (when it is determined that the electromagnetic field has reached the loop coil 11), the wireless tag 80 receives time information and corrects its running time (step S12). In other words, the time information is transferred to the time synchronization mode, and the time information is transmitted from the transmission control box 40 (transmitter 41) to the communication circuit 87 in the format shown in FIG. 5C (that is, the running time is only seconds). , The controller 84 corrects the running time counted by the timer 85.

For example, a situation where the running time of the time measuring unit 85 is “Ht: Mt: St. **” when receiving the time information (SS) will be described.
In this situation, if both seconds match (St = SS) or the second of the time measuring unit 85 is greater than the second of the time information (St> SS), the control unit 84 determines the running time of the time measuring unit 85. Is corrected to “Ht: Mt: SS.00”.

On the other hand, in this situation, when the second of the time measuring unit 85 is smaller than the second of the time information (St <SS), the control unit 84 corrects the running time of the time measuring unit 85 in the following two cases. To do.
First, as the first case, when the second time of the time measuring unit 85 is “0” (St = 0) or the second of the time information is “59” (SS = 59), the running time of the time measuring unit 85 is 1 minute. Return and correct. That is, if “H1: M1: 00.00” is one minute before “Ht: Mt: 00.00”, the control unit 84 sets the running time of the time measuring unit 85 to “H1: M1: SS.00”. And correct.
Next, as a second case, when the second of the time measuring unit 85 is other than “0”, the control unit 84 corrects the running time of the time measuring unit 85 to “Ht: Mt: SS.00”.

  As described above, when the running time of the time measuring unit 85 is corrected, the wireless tag 80 returns the process to step S10 described above.

  When it is determined in step S11 described above that the electromagnetic field is not modulated (when it is determined that the electromagnetic field has reached the loop coil 21), the wireless tag 80 waits until an inflection point is detected (step S13). That is, it waits until the detection circuit 83 detects the inflection point of the electromagnetic field on the loop coil 21. The detection circuit 83 detects the inflection point of the electromagnetic field when detecting the second increase of the electromagnetic field strength after detecting the increase of the electromagnetic field strength of the electromagnetic field.

  When the inflection point is detected, the wireless tag 80 measures the competition time (step S14). That is, the control unit 84 specifies the time measured by the time measuring unit 85 as the competition time at the timing when the detection circuit 83 detects the inflection point of the electromagnetic field on the loop coil 21.

  The wireless tag 80 generates time information including a part of the competition time (step S15). That is, the control unit 84 generates time information in the format shown in FIG. That is, a total of 18 bytes of time information including a value (SS.tt) from the second of the competition time to 1/100 second and other information is generated.

  The wireless tag 80 transmits the generated time information to the receiver 61. (Step S16). That is, time information including a part of the competition time is transmitted to the reception control box 60 through the receiver 61.

  Next, the time restoration process of FIG. 10 will be described. This time restoration process is started in response to the time information being transmitted to the receiver 61 in the time measurement process of FIG. 9 described above.

  First, the reception control box 60 stands by until time information sent from the wireless tag 80 is received via the receiver 61 (step S21).

  When receiving the time information, the reception control box 60 specifies the running time at that time (step S22). That is, the running time measured by the timer device 30 is specified at the timing when the time information is received.

The reception control box 60 restores the competition time based on the relationship between the time information and the running time (step S23).
In other words, when time information including a value from 1 second of the measured competition time to 1/100 second is acquired, the wireless tag is based on the comparison result between the second of the time information and the second of the running time of the timer device 30. The competition time measured at 80 is restored.

For example, a situation where the running time of the timer device 30 is “Hr: Mr: Sr. **” when the time information (SS.tt) is received will be described.
In this situation, if both seconds match (Sr = SS) or if the second time of the timer device 30 is greater than the second of the time information (Sr> SS), the reception control box 60 sets the competition time to “Hr”. : Mr: SS.tt ”.

  On the other hand, in this situation, when the second time of the timer device 30 is smaller than the second of the time information (Sr <SS), the reception control box 60 restores the competition time by returning the minute by one minute during the running time. To do. That is, if one minute before “Hr: Mr: 00.00” is “H1: M1: 00.00”, the reception control box 60 restores the competition time to “H1: M1: SS.tt”. .

  The reception control box 60 supplies the competition time restored in this way to the processing device 70 (step S24). That is, the restored competition time and the tag ID included in the time information are supplied to the processing device 70 and stored.

By such time measurement processing and time restoration processing, the amount of transmission data of time information can be reduced to about 20%. Even when such time information is transmitted, since the wireless tag 80 and the timer device 30 measure the synchronized running time, the reception control box 60 can appropriately restore the competition time. Can do.
As a result, it is possible to appropriately acquire the competition time of each competitor while reducing the data transmission amount.

(Other embodiments)
In the above embodiment, the case where the time information is transmitted in the format shown in FIG. 8A has been described. However, the time information may be transmitted in a format that reduces the data amount.

For example, the wireless tag 80 may transmit time information in the format shown in FIG.
In other words, a flag indicating odd or even number (even number) of the competition time seconds (in this case, it is true when it is even, and false when it is odd) and values up to 1/10 second and 1/100 second (that is, tt) And a total of 17 bytes of time information including other information.
That is, in the time information shown in FIG. 11A, the data amount can be reduced to about 30% as compared with the case shown in FIG.

Even when a part of the competition time is transmitted, as shown in FIG. 11B, the wireless tag 80 side and the timer device 30 measure the synchronized running time. The competition time can be properly restored on the side (reception control box 60).
In other words, when the flag indicating the odd / even of the measured competition time and the time information including values up to 1/10 second and 1/100 second are acquired, the odd / even indicated by the flag of the time information and the timer device The competition time measured by the wireless tag 80 is restored based on the comparison result with the odd / even second in the running time of 30.

For example, a situation where the running time of the timer device 30 is “Hr: Mr: Sr. **” when the time information (Flg.tt) is received will be described.
In this situation, if the odd number of the flag matches the odd number of seconds of the timer device 30 (Flg is true and Sr is even, or Flg is false and Sr is odd), the reception control box 60 determines the competition time. Restore “Hr: Mr: SS.tt”.

On the other hand, in this situation, when the odd / even of the flag and the odd / even of the second time of the timer device 30 do not match (Flg is true and Sr is odd, or Flg is false and Sr is even), the reception control box 60 The competition time is restored in two cases.
First, as a first case, when the second time of the timer device 30 is “0” (Sr = 0), the reception control box 60 restores the competition time by moving the minute back by 1 minute during the running time. That is, if one minute before “Hr: Mr: 00.00” is “H1: M1: 00.00”, the reception control box 60 restores the competition time to “H1: M1: 59.tt”. .
Next, as a second case, if the second time of the timer device 30 is other than “0”, the reception control box 60 restores the competition time by returning the running hour, minute, and second by one second. That is, if one second before “Hr: Mr: Sr.00” is “H1: M1: S1.00”, the reception control box 60 restores the competition time to “H1: M1: S1.tt”. .

As described above, even when the time information shown in FIG. 11A is transmitted, the running time is synchronized between the wireless tag 80 and the timer device 30, and therefore the competition time is determined by the reception control box 60. Can be restored properly.
As a result, it is possible to appropriately acquire the competition time of each competitor while reducing the data transmission amount.

  In the above embodiment, the case where the measurement system for competition is applied to a marathon competition has been described, but the present invention can be applied to other competitions as appropriate. For example, the present invention may be applied to land cross-country competitions.

  As described above, according to the present invention, it is possible to appropriately acquire the competition time of each athlete while reducing the data transmission amount.

It is a schematic diagram which shows an example of a structure of the measurement system for competitions applied to embodiment of this invention. (A) is a schematic diagram which shows an example of the shape (substantially rectangular shape) of a loop coil, (b) is a schematic diagram for demonstrating the electromagnetic field produced | generated, (c) demonstrates intensity distribution of an electromagnetic field. It is a schematic diagram for doing. (A) is a schematic diagram which shows an example of the shape (substantially 8 character shape) of a loop coil, (b) is a schematic diagram for demonstrating the electromagnetic field produced | generated, (c) is intensity distribution of an electromagnetic field. It is a schematic diagram for demonstrating. (A)-(c) is a schematic diagram for demonstrating until the synchronized running time is timed with a timer apparatus. (A) is a schematic diagram which shows an example of the time delivery format in a start point and the first time measuring point, (b) is a schematic diagram for demonstrating the mode of the time synchronization, (c) is two It is a schematic diagram which shows an example of the time delivery format in the time-measurement point after the eyes, (d) is a schematic diagram for demonstrating the mode of the time synchronization. It is a block diagram which shows an example of a structure of a wireless tag. (A), (b) is a schematic diagram for demonstrating the mode of detection of an electromagnetic field. (A) is a schematic diagram which shows an example of the format of the time information which a radio | wireless tag transmits, (b) is a schematic diagram which shows an example of the reference format for a comparison, (c) is a game time restored. It is a schematic diagram for demonstrating a mode. It is a flowchart for demonstrating the time measurement process applied to embodiment of this invention. It is a flowchart for demonstrating the time restoration process applied to embodiment of this invention. (A) is a schematic diagram which shows an example of the other format in the time information which a radio | wireless tag transmits, (b) is a schematic diagram for demonstrating a mode that competition time is decompress | restored.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Modulation magnetic field generator 11 Loop coil 20 Magnetic field generator 21 Loop coil 30 Timer apparatus 40 Transmission control box 41 Transmitter 50 Time synchronization console 60 Reception control box 61 Receiver 70 Processing apparatus 80 Wireless tag

Claims (6)

A measurement system for competition, including a wireless device carried by the athlete, and a receiving device that receives time information from the wireless device,
The wireless device includes
A time measuring means for measuring the first reference time;
Electromagnetic field detection means for detecting an electromagnetic field generated on the runway on which the athlete runs,
A time point detecting means for detecting a predetermined time point based on the detected electromagnetic field;
Time measuring means for measuring the first reference time measured by the time measuring means as a competition time when the time measurement point is detected;
Time information transmission means for transmitting time information including a part of the measured competition time to the receiving device is provided,
The receiving device includes
Time information receiving means for receiving the time information transmitted from the wireless device;
Receiving side timing means for timing the second reference time;
There is provided time restoration means for restoring the competition time measured by the wireless device based on the relationship between the received time information and the second reference time measured by the reception side timing means. Yes,
Measuring system for competitions characterized by this. The time information transmitting means of the wireless device transmits the time information including a value up to a predetermined digit less than or equal to a second of the measured competition time to the receiving side device,
The time restoration unit of the reception side device is configured to measure the time measurement of the wireless device based on a comparison result between at least the second of the time information and the second reference time measured by the reception side timing unit. Restoring the competition time measured by means,
The competition measurement system according to claim 1, wherein: The time information transmission means of the wireless device sends the time information including a flag indicating an odd / even second of the measured competition time and a value up to a predetermined digit of 1/10 second or less to the receiving side device. Send
The time restoring means of the receiving side device is based on a comparison result between at least the odd / even shown by the flag of the time information and the odd / even of the second reference time measured by the receiving side timing means, Restoring the competition time measured by the wireless device;
The competition measurement system according to claim 1, wherein: The time restoring means of the receiving side device, when at least the odd / even shown by the flag of the time information does not match the odd / even of the second reference time measured by the receiving time measuring means, The competition time measured by the wireless device is restored based on the second value of the second reference time measured by the receiving time measuring means.
The game measurement system according to claim 3, wherein: The receiving device further includes transmission means for transmitting time information including a part of the second reference time measured by the receiving time measuring means to the wireless device,
The wireless device corrects the first reference time measured by the time measuring means based on the receiving means for receiving the time information sent from the transmitting means and the time information received by the receiving means. Correction means is further provided,
The game measurement system according to claim 1, wherein the game measurement system is a game measurement system. A time acquisition method in a system including a wireless device carried by a player and a receiving side device that receives time information from the wireless device,
In the wireless device, a time measuring step for measuring a first reference time;
In the wireless device, an electromagnetic field detection step of detecting an electromagnetic field generated on a runway on which the athlete runs,
In the wireless device, based on the electromagnetic field detected in the electromagnetic field detection step, a timing point detection step for detecting a predetermined timing point;
In the wireless device, when the timing point is detected in the timing point detection step, a time measurement step of measuring the first reference time measured in the timing step as a competition time;
In the wireless device, the time information transmission step of transmitting the time information including a part of the competition time measured in the time measurement step to the reception side device;
In the receiving device, a time information receiving step for receiving the time information transmitted in the time information transmitting step of the wireless device;
In the reception side device, a reception side time measuring step of measuring a second reference time;
In the receiving side device, based on the relationship between the time information received in the time information receiving step and the second reference time measured in the receiving side timing step, the time measuring step of the wireless device A time restoration step for restoring the competition time measured at
A time acquisition method comprising:

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