JP7076218B2 - Time measurement system, program of the first communication device, and program of the second communication device - Google Patents

Description

The present invention relates to a time measuring system, a program of a first communication device, and a program of a second communication device.

In athletics track events, athletes go around the tracks of the stadium. In such competitions or practice of such competitions, the split time, which is the cumulative time from the start, or, for example, the lap time for each lap of the track is measured. The split time and lap time can also be measured by the measurer pressing the stopwatch. However, when multiple athletes are orbiting the track at the same time, the measurer has to operate the stopwatch for each athlete, which is difficult to work with and may cause forgetting to press or making a mistake. there were.

On the other hand, in sports competitions such as marathons where athletes aim to reach the goal while passing through measurement points set along the course in order, work such as determining that the athlete has passed the measurement points and measuring the time passed has been performed. Measurement systems using electronic devices may be used for automation.
In such a measurement system, the trigger point is detected based on the increase or decrease in the electromagnetic field strength of the electromagnetic field generated by the loop coil arranged on the track, and the time measured when the trigger point is detected is included. The time information is transmitted to the receiving device (see, for example, Patent Document 1).

Japanese Patent No. 4865521

However, in the measurement system of the invention described in Patent Document 1, since the antennas (loop coils) are separated for the detection of the trigger point and the transmission / reception of time information, it is necessary to prepare two loop antennas on the track, which is inevitable. The device becomes large-scale.
Therefore, in order to reduce the work by the measurer, prevent forgetting to push, and prevent mistakes in pushing, for example, in the track and field club of a school, let's introduce the measurement system of the invention described in Patent Document 1 for the practice of track events. In that case, there is a problem that the measurement system becomes large-scale.

The present invention has been made in view of the above problems, and provides a time measurement system, a program of a first communication device, and a program of a second communication device capable of constructing a timekeeping system that does not require a large-scale device. The purpose is.

In order to achieve the above object, the time measurement system (measurement system 1) according to one aspect of the present invention is a movement that communicates with the first communication device (communication device 20, 20A) which is a fixed station and the first communication device. In a time measuring system including a second communication device (clocks 10 and 10A) which is a station, the first communication device is a first communication unit (wireless communication control unit 207) that transmits a communication signal to the second communication device. The second communication device includes a time measuring unit for measuring time, a second communication unit (wireless communication control unit 107, communication control unit 1013) for receiving the communication signal, and the second communication unit receiving the communication signal. A control unit (control unit) whose measurement time is the time measured by the time measuring unit when the second communication device is in close proximity to the first communication device according to the reception state of the communication signal (for example, an advertisement packet). 101) and.

Further, in the time measurement system according to one aspect of the present invention, the first communication unit transmits the first transmission radio wave as the communication signal, and the first reception period for receiving the radio wave from the second communication device is set. The second communication unit is provided with a second reception period for receiving the first transmission radio wave from the first communication device, and the second communication device is provided with the control unit during the second reception period. The second communication unit includes a storage unit that stores the time measured by the time measuring unit in the approaching state as the measurement time, and the second communication unit uses the measurement time stored by the storage unit as the second transmission radio wave. 1 It may be transmitted to a communication device.

Further, in the time measurement system according to one aspect of the present invention, the control unit of the second communication device receives the first transmission radio wave for the time when the first transmission radio wave from the first communication device is received. The time when the reception strength exceeds the predetermined threshold value, from the time when the reception strength when receiving the first transmission radio wave exceeds the predetermined threshold value to the time when the reception strength falls below the predetermined threshold value. The reception strength during the time between the time when the first transmission radio wave is received and the reception strength when the reception strength exceeds the predetermined threshold value and thereafter until the reception strength falls below the predetermined threshold value. At least one of the times when is the maximum may be set as the measurement time determined to be in the approaching state.

Further, in the time measurement system according to one aspect of the present invention, the first transmission radio wave includes the identification information of the first communication device, and the second transmission radio wave includes the identification information of the first communication device and the measurement. It may include information about time.

Further, in the time measurement system according to one aspect of the present invention, the first communication device transmits the first transmission radio wave including the identification information of the first communication device and the public key, and receives the first transmission radio wave from the second communication device. The encrypted information about the measurement time is decrypted using the private key, and the control unit of the second communication device uses the public key included in the received first transmission radio wave to relate to the measurement time. The information may be encrypted, and the second communication unit of the second communication device may transmit the second transmission radio wave including the encrypted information regarding the measurement time to the first communication device.

Further, in the time measurement system according to one aspect of the present invention, the first communication device includes the public key encrypted with the identification information of the first communication device by encrypting the public key using a common key. The first transmission radio wave may be transmitted.

Further, in the time measurement system according to one aspect of the present invention, the first communication device may update the public key and the private key at arbitrary timings.

Further, in the time measurement system according to one aspect of the present invention, the first communication unit starts transmission of the communication signal when the time for starting the competition comes or when the signal for starting the competition is acquired from the outside. You may try to do it.

Further, in the time measurement system according to one aspect of the present invention, the control unit of the second communication device ends the measurement of the measurement time when the number of times the approach state is determined reaches a predetermined number of times. The transmission of the measured time to the first communication device may be terminated.

Further, in the time measurement system according to one aspect of the present invention, when the measurement time is measured, the control unit receives the communication signal for a predetermined period until a predetermined time elapses, or further, under predetermined conditions. Until then, the measurement may not be performed.

Further, in the time measurement system according to one aspect of the present invention, the first communication unit periodically transmits a transmission radio wave having a transmission period at each transmission interval, and the second communication device within the transmission period. When the response radio wave to the transmitted radio wave is received, the next transmitted radio wave that has passed the transmission interval may not be transmitted.

Further, in the time measurement system according to one aspect of the present invention, the second communication device is portable to the athlete, and the first communication device is the second communication in the competition space where the athlete competes. It may be used at the same time as the use of the device.

In order to achieve the above object, the program of the first communication device (communication device 20) according to one aspect of the present invention is a second communication which is a mobile station and has a timekeeping function to the computer of the first communication device which is a fixed station. A procedure for transmitting a communication signal to the device, a procedure for receiving the measurement time transmitted by the second communication device, a procedure for storing the received measurement time, and a procedure for displaying a plurality of the stored measurement times. And to execute.

In order to achieve the above object, the program of the second communication device (clock 10) according to one aspect of the present invention is a computer of the second communication device which is a mobile station and has a timing function, and a first communication device which is a fixed station. A procedure for receiving the communication signal transmitted by the computer and a procedure for starting the measurement of the measurement time when the communication signal is first received or when the reception strength when the communication signal is received exceeds a predetermined threshold value. When the communication signal is received for the second time or later, or when the reception strength when the communication signal is received exceeds a predetermined threshold value for the second time or later, the procedure for measuring the measurement time and the procedure for measuring the measurement time. The procedure of transmitting the measured time to the first communication device and the procedure of transmitting the measured time to the first communication device are executed.

According to the present invention, it is possible to construct a timekeeping system that does not require a large-scale device.

It is a figure for demonstrating the outline of the measurement system which concerns on this embodiment. It is a figure for demonstrating the outline of the advertising packet in BLE. It is a block diagram which shows the schematic structure of the measurement system which concerns on this embodiment. It is a figure which shows the example of the information which the storage part of the communication apparatus which concerns on this embodiment stores. It is a figure which shows the example of the information which the storage part of the communication apparatus which concerns on this embodiment stores. It is a figure which shows the state which the clock has received the communication signal transmitted by the communication device which concerns on this embodiment. It is a figure which shows the example of the strength of the communication signal transmitted by the communication device which concerns on this embodiment, and the radio wave received by a timepiece. It is a figure which shows the example of the current waveform when the communication device which concerns on this embodiment transmits a transmission signal, and the timepiece receives. It is a figure explaining an example which a communication device receives the measurement time data transmitted by the clock which concerns on this embodiment. It is a figure which shows the example of the current waveform at the time of a communication device receiving the measurement time data transmitted by the clock which concerns on this embodiment. It is a figure explaining the operation of the clock and the communication device during the competition which concerns on this embodiment. It is a figure which shows the example of the current waveform of the clock and the communication equipment during the competition which concerns on this embodiment. It is a figure which shows the example of the image displayed on the display part of the communication device which concerns on this embodiment. It is a figure which shows the example of the image of the measurement time information of an individual athlete displayed on the display part of the communication device which concerns on this embodiment. It is a figure which shows the example of the image which is displayed when the display part of the communication device which concerns on this embodiment is a horizontally long state. It is a figure which shows the example of the image of the measurement time information displayed on the display part of the clock which concerns on this embodiment. It is a figure which shows the other example of the image of the measurement time information displayed on the display part of the clock which concerns on this embodiment. It is a figure which shows the example of the intermittent operation in the transmission of the measurement time information which concerns on this embodiment. It is a sequence diagram of the clock and the communication device in the intermittent operation which concerns on this embodiment. It is a figure for demonstrating the outline of the measurement system in the modification of this embodiment. It is a figure which shows the example of the data which a communication device transmits to a clock in the modification of this embodiment. It is a figure which shows the example of the data to be transmitted to the communication device in the modification of this embodiment. It is a figure which shows the communication example of a timepiece and a communication device in the modification of this embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The scope of the present invention is not limited to the following embodiments.

First, the outline of the present embodiment will be described.
FIG. 1 is a diagram for explaining the outline of the measurement system 1 according to the present embodiment. As shown in FIG. 1, the measurement system 1 includes one or more clocks 10 (first clock 10-1, second clock 10-2, ...; second communication device) and communication device 20 (first). 1 communication device) and is included. When the measurement system 1 includes a plurality of clocks 10, the configurations of the plurality of clocks 10 may be the same or different. In the following description, an example in which the configuration of the plurality of clocks 10 is the same will be described. Hereinafter, in the present embodiment, when one of the first clock 10-1, the second clock 10-2, ... Is not specified, it is referred to as a clock 10.

The clock 10 and the communication device 20 are a communication method of a Wi-Fi (Wireless Fidelity) standard, a Bluetooth (registered trademark) LE (Low Energy) (hereinafter referred to as BLE) standard, and the like. In the following description, an example in which the communication method is BLE will be described.

The communication device 20 is installed at, for example, a starting point. In the embodiment, it is assumed that the goal point is the same as the start point. The point where the communication device 20 exists can be any place where the measurement is desired, and the start point and the goal point can be any different points. The watch 10 is worn by the athlete. The athlete operates the clock 10 to set the number of laps of the track before the start of the competition. In addition, the athlete operates the clock 10 so that the communication function is turned on. The clock 10 starts a radio wave scanning operation (second reception period). The communication device 20 is operated by, for example, a measurer. The measurer operates the communication device 20 at the start of the competition to set the start of the competition. The communication device 20 starts transmitting a communication signal (first transmission radio wave) at the same time as setting the start of the competition. The communication signal is an advertising packet. When the clock 10 receives the advertising packet from the communication device 20, it starts measuring the lap time (measurement time) and the split time (measurement time). When the clock 10 receives the communication signal from the communication device 20, the clock 10 measures the lap time and the split time. The clock 10 transmits an advertising packet including the measured lap time and split time and identification information for identifying the clock 10 to the communication device 20 as a communication signal (second transmission radio wave). Here, the identification information is, for example, a Bluetooth® Device address. The communication device 20 constantly performs a scanning operation (first reception period), extracts identification information, lap time, and split time from the communication signal received from the clock 10, and stores the identification information in association with the lap time and split time. When the clock 10 receives the communication signal from the communication device 20 for the set number of laps, the clock 10 ends the measurement and transmits the communication signal to the communication device 20. The number of laps can be rephrased as the number of approaches counted as the number of times the clock 10 has approached the communication device 20.
Further, in FIG. 1, ..., -P2, -P1, P0, P1, P2, ... Show an example of the position where the clock 10 approaches the communication device 20.

After the start of communication, the clock 10 constantly scans and transmits an advertising packet at predetermined time intervals, and ends communication when it receives a communication signal from the communication device 20 for a set number of laps.
Further, after the start of the competition, the communication device 20 constantly scans and transmits an advertising packet at predetermined time intervals, and ends the communication when the measurer sets the end of the competition.
The communication device 20 measures the lap time, the split time, and the like by detecting the state of being close to the clock 10. The state in which the communication device 20 and the clock are close to each other is detected when the radio wave intensity received by the clock 10, which will be described later, becomes stronger.

In this way, the clock 10 measures when the advertising packet transmitted by the communication device 20 is received, and transmits the advertising packet to the communication device 20 including the measured result. The communication device 20 receives the measurement result included in the advertising packet transmitted by the clock 10. In the present embodiment, measurement is performed without establishing communication between the clock 10 and the communication device 20. That is, in the present embodiment, the clock 10 and the communication device 20 each scan each other.

<Advertising packet in BLE>
Here, the outline of the advertising packet in BLE will be described.
FIG. 2 is a diagram for explaining an outline of an advertising packet in BLE. The figure indicated by reference numeral f1 is a diagram showing a packet structure. The figure indicated by reference numeral f2 is a figure showing the structure of advertising data.
In BLE, communication is performed using the 2.4 GHz band, and the number of channels is 40. In Advertising, channels 37, 38, and 39 are used. Further, as shown by reference numeral f1 in FIG. 2, the configuration of the advertising packet in BLE is the same as the packet configuration in BLE (see, for example, BLUETOOTH (registered trademark) SPECIFICATION Version 4.0 [Vol 1], pages 36 to 47). ). Specifically, the advertising packet is composed of a Syncword, an Access Address, a PDU, and a CRC. The Premium is 1 octet, the Access Addless is 4 octets, the PDU is 2 to 38 octets, and the CRC is 3 octets. In addition, the PDU is composed of Header and Payload. This PFU Header contains a 4-bit PDU Type. The PDU Type can set a scan request (SCAN_REP), a scan response (SCAN_RSP), and the like. And the PDU Payload includes AdvA and AdvData (Advertising Data). AdvA is an address for identifying the device.

Further, as shown by the reference numeral f2 in FIG. 2, the AdvData is composed of 31 octets, the first 1 octet is the length of the data, and the rest is composed of AdType (Advertising Data type) and Ad Data (Advertesis Data). (See, for example, BLUETOOTH® SPECIFICATION Version 4.0 [Vol 3], page 375). Then, by setting AD Type, the data can be used as "Manufactureer Specific Data". In this case, the Manufactureer can arbitrarily determine the length and content of the Ad Data.
In this embodiment, the data is used as "Manufactureer Specific Data" in the advertising packet.

FIG. 3 is a block diagram showing a schematic configuration of the measurement system 1 according to the present embodiment.
The clock 10 includes a control unit 101, an oscillation circuit 102, a frequency dividing circuit 103, an operation unit 104, a display unit 105, a storage unit 106, a wireless communication control unit 107 (second communication unit), an antenna 108, a sensor 109, and a battery 110. To prepare for.
The communication device 20 includes a control unit 201, an operation unit 202, a display unit 203, a storage unit 204, a sensor 205, an antenna 206, a wireless communication control unit 207 (first communication unit), a battery 208, an oscillation circuit 209, and a frequency dividing circuit. It is equipped with 210.

First, the clock 10 will be described.
The clock 10 is, for example, a digital clock having a timekeeping function and a communication function. After the communication starts, the clock 10 constantly scans the radio wave from the communication device 20 and detects the communication signal transmitted by the communication device 20. The transmission signal transmitted by the communication device 20 includes identification information for identifying the communication device 20. The clock 10 measures the lap time and the split time when the communication signal is received. In the following explanation, the lap time and the split time are referred to as measurement time information.
The clock 10 transmits a communication signal including the measured measurement time information and the identification information of the own clock 10. When the clock 10 receives the communication signal from the communication device 20 a predetermined number of times, the clock 10 ends scanning, measurement, and transmission of the communication signal.

The control unit 101 includes a timekeeping unit 1011, an information processing unit 1012 (control unit), and a communication control unit 1013 (second communication unit). The control unit 101 measures the time using the reference signal output by the frequency dividing circuit 103, and displays the timed result on the display unit 105. The control unit 101 sets the number of times the communication signal is received from the communication device 20 based on the operation result output by the operation unit 104, and stores the set number of times in the storage unit 106. The control unit 101 controls the wireless communication control unit 107 to receive the communication signal transmitted by the communication device 20, and measures the lap time and the split time when the communication signal is received. The control unit 101 controls the wireless communication control unit 107 to transmit a communication signal including identification information and measurement time information to the communication device 20.

The time measuring unit 1011 includes an internal counter, measures the current time based on a reference signal input from the frequency dividing circuit 103, and holds pointer position information indicating the time measured in the internal counter.

The information processing unit 1012 stores the detection result output by the operation unit 104 in the storage unit 106. The detection result includes, for example, an instruction to start communication, the number of approaches described above, and the like. The setting of the number of approaches is transmitted from the communication device 20 to the watch 10 in a state where the communication device 20 and the watch 10 have established communication in advance. The number of approaches may be set on the communication device 20 side and extracted from the communication signal transmitted by the communication device 20. When the operation unit 104 outputs an instruction to start communication, the information processing unit 1012 outputs an instruction to start scanning to the communication control unit 1013. The information processing unit 1012 extracts the identification information of the communication device 20 from the received communication signal output by the communication control unit 1013, and stores the extracted identification information of the communication device 20 in the storage unit 106. The information processing unit 1012 starts measurement when the communication signal is first received after the communication is started. The measurement may be started by the user manually operating the operation unit included in the timepiece 10. From the second time onward, the information processing unit 1012 measures the number of times the communication signal is received, the lap time and the split time when the communication signal is received, and generates transmission data including the measured measurement time information and the identification information of the own clock 10. , The generated data is output to the communication control unit 1013. The information processing unit 1012 receives the communication signal for the number of approaches, transmits the communication signal, ends the measurement of the lap time and the split time, and outputs an instruction to end the communication to the communication control unit 1013. The information processing unit 1012 may change the image displayed on the display unit 105 based on the sensor output of the sensor 109. The images displayed on the display unit 105 are time information, lap time and split time in the competition. The image displayed by the display unit 105 will be described later. The information processing unit 1012 has described an example in which the lap time or split time measured when a communication signal is received from the communication device 20 is transmitted as measurement time information, but the present invention is not limited to this. The information processing unit 1012 may transmit one of the lap time and the split time. The information processing unit 1012 may transmit the time when the communication signal is received from the communication device 20 as the measurement time information. The information processing unit 1012 measures the lap time and the split time counted when the communication signal is received from the communication device 20, stores them in the storage unit 106, resets the lap time, and restarts the counting of the lap time. As a result, the information processing unit 1012 measures the lap time for each lap of the track. The information processing unit 1012 reads out the lap time and the split time stored in the storage unit 106, controls the communication control unit 1013, and transmits the lap time. The information processing unit 1012 displays images such as the time measured, the split time, and the lap time on the display unit 105. The image displayed by the display unit 105 will be described later.

The communication control unit 1013 controls the wireless communication control unit 107 in response to the instruction to start the communication output by the information processing unit 1012, and starts the transmission and scanning operation of the communication signal (advertising packet). The communication control unit 1013 controls the wireless communication control unit 107 to detect and receive the communication signal transmitted by the communication device 20. The communication control unit 1013 may detect a communication signal from the communication device 20 when the strength of the received radio wave is equal to or higher than a predetermined threshold value. The communication control unit 1013 may detect the reception intensity by, for example, RSSI (Received Signal Strength Indicator). Here, the radio wave intensity of the communication signal is, for example, about 0 to −100 dBm. The communication control unit 1013 controls the wireless communication control unit 107 to transmit a communication signal to the communication device 20. The communication control unit 1013 controls the wireless communication control unit 107 in response to the instruction to end the communication output by the information processing unit 1012, and ends the transmission and scanning of the communication signal (advertising packet).

The oscillation circuit 102 includes, for example, a crystal oscillator. A crystal oscillator is a passive element used to oscillate a first frequency from its mechanical resonance by utilizing the piezoelectric phenomenon of quartz. The oscillation frequency of the crystal oscillator is, for example, 32 kHz. The oscillation circuit 102 outputs the clock signal generated by oscillating the crystal oscillator to the frequency dividing circuit 103.
The frequency dividing circuit 103 divides the signal of the clock signal output by the oscillation circuit 102 to a desired frequency, and outputs the divided reference signal to the control unit 101. The frequencies of the reference signals are, for example, 64 Hz and 32 Hz.

The operation unit 104 is, for example, a crown or a push switch. The operation unit 104 detects the user's operation and outputs the detected operation result to the control unit 101. The detection result of the crown is the rotation angle of the crown and the like. The detection result of the push switch is an on state (pressed state), an off state (not pressed state), the number of times the push is pressed, and the like. Communication start is selected by operating the crown or push switch.

The display unit 105 is a device for displaying information. As an example, the display unit 105 is composed of a 7-segment LED (light emitting diode), a liquid crystal display device (LCD), and an organic EL (Electroluminescence) device. The display unit 105 displays the measured current time, the measured lap time, the split time, and the like according to the control of the control unit 101.

The storage unit 106 stores information and programs necessary for controlling the clock 10. The storage unit 106 stores the number of times the communication signal is received. The storage unit 106 stores the measured measurement time information. The storage unit 106 stores the identification information of the own clock 10.

The wireless communication control unit 107 transmits a communication signal to the communication device 20 via the antenna 108. The wireless communication control unit 107 receives the communication signal transmitted by the communication device 20 via the antenna 108, and outputs the received communication signal to the control unit 101. The wireless communication control unit 107 stores identification information unique to the clock 10. The identification information may be stored in the storage unit 106.

The antenna 108 converts the communication signal output by the wireless communication control unit 107 into radio waves, and transmits the converted radio waves to the communication device 20. The antenna 108 converts the received radio wave into an electric signal, and outputs the converted electric signal as a communication signal to the wireless communication control unit 107.

The sensor 109 is, for example, a heart rate sensor, an acceleration sensor, a gyro sensor, a temperature sensor, an alcohol sensor, a sensor for detecting a sleeping state, a sensor for detecting a person's state, and the like. The sensor 109 outputs the detected sensor detection result to the control unit 101.

The battery 110 is, for example, a button battery or a secondary battery. The battery 110 supplies the stored electric power to each part of the clock 10.

Next, the communication device 20 will be described.
As shown in FIG. 2, the communication device 20 is, for example, a tablet terminal, a smartphone, or the like, which has a communication function and a display screen. The communication device 20 may be a dedicated device. After the start of the competition, the communication device 20 transmits a communication signal including the identification information of the own device. The communication device 20 constantly scans radio waves and receives a communication signal transmitted by the clock 10. The communication device 20 extracts the identification information and the measurement time information of the clock 10 from the received communication signal, and stores the identification information in association with the measurement time information.

The control unit 201 activates an application that performs measurement according to the operation of the operation unit 202. The control unit 201 detects that the operation unit 202 is operated and the start of the competition is instructed when the application is running. When the control unit 201 detects that the start of the competition has been instructed, the control unit 201 controls the wireless communication control unit 207 to start transmitting and scanning a communication signal (advertising packet) including the identification signal of the own device. The control unit 201 controls the wireless communication control unit 207 to receive the communication signal transmitted by the clock 10. The control unit 201 extracts the identification information of the clock 10 and the measurement time information from the received communication signal, associates the measurement time information with the extracted identification information of the clock 10, and stores the storage unit 204 for each identification information of the clock 10. To memorize. The control unit 201 detects that the operation unit 202 has been operated and the end of the competition has been instructed. When the control unit 201 detects that the end of the competition has been instructed, the control unit 201 controls the wireless communication control unit 207 to end the transmission of the communication signal (advertising packet) and the scanning operation. Based on the sensor output of the sensor 205, the control unit 201 detects the posture of the own device whether the screen is in the vertically long state or the screen is in the horizontally long state. The control unit 201 may change the image displayed on the display unit 203 according to the detected posture of the own device. The image displayed on the display unit 203 is a measurement result based on the received communication signal, that is, a lap time and a split time for each player. The image displayed by the display unit 203 will be described later. The number of approaches may be set on the communication device 20 side, and the communication signal may be transmitted to the clock 10 including the number of approaches. When the measured time information included in the communication signal transmitted by the clock 10 is time, the control unit 201 calculates the lap time and split time using the received time information, and stores the calculated lap time and split time. It may be stored in 204. The control unit 201 may determine that the competition has started and start transmitting the communication signal when the competition start time set in advance by the operation of the operation unit 202 is reached. Further, the control unit 201 includes an internal counter, measures the current time based on the reference signal input from the frequency dividing circuit 210, and holds the pointer position information indicating the time measured in the internal counter.

The operation unit 202 detects the operation input from the user and outputs the detected operation result to the control unit 201. The operation unit 202 is, for example, a touch panel sensor provided on the display unit 203.

The display unit 203 is a device for displaying information. The display unit 203 is configured by, for example, a liquid crystal display device (LCD) and an organic EL (Electroluminescence) device. On the display unit 203, for example, an image of an application or the like is displayed according to the control of the control unit 201.

The storage unit 204 stores information, a program, an application for measuring a competition, and the like necessary for controlling the communication device 20. The storage unit 204 associates the identification information of the clock 10, for example, with the name of the athlete, and stores the identification information for each identification information. The storage unit 204 associates the measurement time information with the identification information of the clock 10 and stores the identification information for each identification information.

The sensor 205 is a gyro sensor that detects the posture of the communication device 20 (whether the screen is in a vertically long state or the screen is in a horizontally long state). The sensor 205 outputs the detected sensor detection result to the control unit 201.

The wireless communication control unit 207 transmits a communication signal to the clock 10 via the antenna 206. The wireless communication control unit 207 receives the communication signal transmitted by the clock 10 via the antenna 206, and outputs the received communication signal to the control unit 201.

The antenna 206 converts the communication signal output by the wireless communication control unit 207 into a radio wave, and transmits the converted radio wave to the clock 10. The antenna 206 converts the received radio wave into an electric signal, and outputs the converted electric signal as a communication signal to the wireless communication control unit 207.

The battery 208 is, for example, a secondary battery. The battery 208 supplies the stored electric power to each part of the communication device 20.
The oscillation circuit 209 includes, for example, a crystal oscillator. A crystal oscillator is a passive element used to oscillate a first frequency from its mechanical resonance by utilizing the piezoelectric phenomenon of quartz. The oscillation frequency of the crystal oscillator is, for example, 32 kHz. The oscillation circuit 209 outputs the clock signal generated by oscillating the crystal oscillator to the frequency dividing circuit 210.
The frequency dividing circuit 210 divides the signal of the clock signal output by the oscillation circuit 209 to a desired frequency, and outputs the divided reference signal to the control unit 201. The frequencies of the reference signals are, for example, 64 Hz and 32 Hz.

Next, the information stored in the storage unit 204 of the communication device 20 will be described.
4 and 5 are diagrams showing an example of information stored in the storage unit 204 of the communication device 20 according to the present embodiment.
As shown in FIG. 4, the storage unit 204 stores the athlete's name in association with the identifier of the clock 10. As for the identifier of the clock 10, for example, the clock 10 transmits an advertising packet before the competition. Then, the control unit 201 of the communication device 20 controls the wireless communication control unit 207 to extract an identifier from the advertising packet transmitted by the clock 10, and stores the extracted identifier in the storage unit 204. As for the athlete name, the measurer operates the operation unit 202 of the communication device 20 before the competition, selects a watch to be worn by the athlete, and inputs the athlete name. The control unit 201 associates the player name with the identifier and stores it in the storage unit 204 according to the result of the operation of the operation unit 202.

As shown in FIG. 5, the storage unit 204 stores the identifier of the clock 10 in association with the athlete name, the split time, and the lap time. The control unit 201 controls the wireless communication control unit 207 to extract the split time and the lap time from the advertising packet transmitted by the clock 10 each time the selection passes the goal point, and extracts the extracted split time and the lap time. It is stored in the storage unit 204. For example, the clock 10 worn by "Tanaka Taro" transmits a lap time "2:58" (2 minutes 58 seconds) and a split time "2:58" when passing in front of the first goal. The control unit 201 stores “2:58” in the split time, and the lap time No. Store 1 at "2:58". Subsequently, the watch 10 worn by "Tanaka Taro" transmits "5:57" and the split time "2:59" at the lap time when passing in front of the second goal. The control unit 201 sets the split time. It is updated to "5:57" and stored in lap time No. 2 at "2:58".

Next, the transmission of the communication signal of the communication device 20 and the reception of the communication signal of the clock 10 will be described.
FIG. 6 is a diagram showing a state in which the clock 10 receives a communication signal transmitted by the communication device 20 according to the present embodiment.
As shown in FIG. 6, after the start of the competition, the communication device 20 constantly transmits a communication signal (advertising packet) including the identification signal of the own device, and constantly performs a scanning operation.
After the start of communication, the clock 10 constantly transmits a communication signal (advertising packet) including the identification signal of the own clock 10, constantly scans, and detects and receives the communication signal (advertising packet) from the communication device 20. The clock 10 measures the lap time and the split time when the communication signal transmitted by the communication device 20 can be detected. As shown in FIG. 6, the watch 10 includes a case 11 and a belt.

FIG. 7 is a diagram showing an example of the strength of the communication signal transmitted by the communication device 20 and the radio wave received by the clock 10 according to the present embodiment. In FIG. 7, the horizontal axis represents the time, the position, and the number of approaches, and the vertical axis represents the signal strength. Further, the waveform g1 is a communication signal transmitted by the communication device 20. The waveform g2 is a radio wave of a communication signal received by the clock 10.

Like the waveform g1, the communication device 20 transmits a communication signal (advertising packet) at predetermined time intervals (t1, t2, t3, t4, ...) After the start of the competition.
The clock 10 constantly scans and receives radio waves from the communication device 20. The communication control unit 1013 of the clock 10 determines that the communication signal cannot be received at the times t1, t2, and t7 when the reception strength of the radio wave is less than the threshold value, and the reception strength of the radio wave is equal to or higher than the threshold value. At the time t3, t5, t6, and t9, it is determined that the communication signal can be received. This state represents a state in which the clock 10 is approaching the communication device 20. In this way, FIG. 7 expresses the change in the approach state between the clock 10 and the communication device 20 according to the movement stroke of the clock 10.

In the present embodiment, as described with reference to FIG. 1, the communication device 20 is installed at the goal point (position P0), and the athlete wears the clock 10 and runs on the track. Therefore, the clock 10 gradually approaches the communication device 20, and the reception intensity of the received radio wave becomes stronger accordingly. In the example shown in FIG. 7, the radio field intensity received at the position −P1 exceeds the threshold value, and the radio wave strength received at the position P0 becomes the maximum value. Further, after passing in front of the goal, the received radio wave strength decreases and falls below the threshold value at the position P2. In the present embodiment, the clock 10 measures the time when the received radio wave intensity becomes equal to or higher than the threshold value. In the example shown in FIG. 7, the clock 10 measures the time when the number of approaches is the first time (Nth time / N is an integer, the same applies thereafter) at time t3 (position-P1), and at time t9 (position-P1). Time is performed when the number of approaches is the second (N + 1). Then, as will be described later, the clock 10 receives the communication signal from the communication device 20 so as not to perform the timekeeping a plurality of times during the period when the received radio wave intensity is equal to or higher than the threshold value (for example, time t3 to t6). A mask period TM (time t4 to t8) is provided from the time when the received radio wave intensity exceeds the threshold value to the time when the signal strength is below the threshold value. The mask period TM may be a predetermined predetermined time, or may be a time including a time when the threshold value is reached after the threshold value is exceeded. The interval at which the communication device 20 transmits a communication signal is, for example, several hundred msec. In addition, athletes such as marathons run at, for example, about 1 km / 3 minutes. The speed in this case is about 0.5 m / 100 msec. Although the position P is schematically shown in FIG. 1 for the sake of explanation, when the transmission interval of the communication signal is 100 msec, the interval between the positions where the clock 10 approaches the communication device 20 is about 0.5 m. Since the distance between the positions is short and the measurement can be performed at the same position for each number of approaches, there is no problem even if the measurement is performed for each number of approaches at position-P1 instead of position P0. Further, even if the clock 10 cannot receive the radio wave from the communication device 20 at the position P-1, it can be received and measured at the next position P0, so that there is no problem in the measurement. As described above, in the present embodiment, when the reception intensity of the radio wave received at a time other than the mask period TM is equal to or higher than the threshold value, it is determined that the clock 10 has received the radio wave and measurement is performed, and the measured measurement time information is measured. A communication signal (advertising packet) including the above is transmitted to the communication device 20.

Further, in the present embodiment, the radio wave intensity is the maximum value until the time t7 (position P2) when the radio wave intensity received at time t3 (position −P1) exceeds the threshold value and the radio wave intensity falls below the threshold value. At the time t5 (point P0), the clock 10 can measure the time. In this case, although not shown, when there are a plurality of peaks (maximum values) in which the radio wave intensity is equal to or higher than the threshold value, the clock 10 clocks the largest peak.
Further, the clock 10 sets an intermediate time point in the period from the time t3 (position-P1) when the received radio wave intensity exceeds the threshold value to the time t7 (position P2) when the radio wave sensitivity falls below the threshold value. Can be the time when the clock is timed. In this case, the time measured by the clock 10 can be easily calculated from the time exceeding the threshold value and the time falling below the threshold value.
It is naturally possible that the threshold value when the received radio wave intensity exceeds the threshold value and the threshold value when the radio wave intensity falls below the threshold value are different values. In this case, the measurement time according to the actual situation can be effectively calculated.

FIG. 8 is a diagram showing an example of a current waveform when the communication device 20 according to the present embodiment transmits a transmission signal and the clock 10 receives the transmission signal.
In FIG. 8, the horizontal axis is time. The waveform g11 is a current waveform that flows through the communication device 20 during communication. The waveform g12 is a current waveform that flows through the clock 10 during communication. Further, the period T1 is an advertisement interval (Advertise Interval). The period T2 is a scan interval (Scan Interval). The period T3 is a scan window. Further, the reference numeral Rx represents reception. Further, the period T3 is the second reception period.

The communication device 20 transmits an advertising packet at times t12, t16, and t22. As a result, as shown in the waveform g11, a current flows through the communication device 20 during the period from time t12 to t13, t17 to t18, and t22 to t23.
As shown in the waveform g12, a current flows through the clock 10 during the scan window period T3 (time t11 to t14, t15 to t16, t19 to t20, t21 to t24). Further, when the radio wave can be detected during the period T3, the clock 10 receives the advertising packet transmitted by the communication device 20. In the example shown in FIG. 8, the clock 10 receives the time t11 to t14 and the time t21 to t24, and does not receive the time t15 to t16 and the time t19 to t20. Further, although the advertising packet is transmitted during the period from time t17 to t18, the clock 10 is not received because it is outside the period T3.

Next, an example in which the communication device 20 receives the measurement time data transmitted by the clock 10 will be described.
FIG. 9 is a diagram illustrating an example in which the communication device 20 receives the measurement time data transmitted by the clock 10 according to the present embodiment.

When the clock 10 receives the advertising packet from the communication device 20, it measures the lap time and the split time, and transmits the advertising packet including the measured measurement time information and the identification information of the own clock 10 to the communication device 20.

The communication device 20 constantly scans and detects an advertising packet from the clock 10. The communication device 20 may detect the radio wave based on the radio wave strength as in the clock 10. The communication device 20 extracts the identification information and the measurement time information of the clock 10 from the received advertising packet, and stores the extracted measurement time information in the storage unit 204 in association with the identification information.
The communication device 20 identifies a plurality of clocks 10 by using the identification information of the clocks 10 extracted from the received advertising packet. The communication device 20 causes the display unit 203 to display the measurement result based on the information stored in the storage unit 204. The example shown in FIG. 9 is an example in which measurement time information is received from three clocks 10 (first clock 10-1, second clock 10-2, third clock 10-3). On the display unit 203, the measurement time information d1 of the first clock 10-1, the measurement time information d2 of the second clock 10-2, and the measurement time information d3 of the third clock 10-3 are displayed. ..

FIG. 10 is a diagram showing an example of a current waveform when the communication device 20 receives the measurement time data transmitted by the clock 10 according to the present embodiment. In FIG. 10, the horizontal axis is time. The waveform g21 is a current waveform that flows through the communication device 20 during communication. The waveform g22 is a current waveform that flows through the clock 10 during communication.

In the communication device 20, as shown in the waveform g21, a current flows during the scan window period (time t31 to t34, t37 to t40).
As shown in the waveform g22, a current flows through the clock 10 during the period (time t32 to t33, t35 to t36, t38 to t39) during which the advertising packet is transmitted.
The communication device 20 receives the advertising packet when the radio wave from the clock 10 can be detected during the scan window period. In the example shown in FIG. 10, the communication device 20 receives at times t32 to t33 and times t38 to t39, but does not receive at times t35 to t36.
The period during which the scan operation is performed (time t31 to t34, t37 to t40) is the first reception period.

Next, the operation of the clock 10 and the communication device 20 during the competition will be described with reference to FIGS. 11 and 12.
FIG. 11 is a diagram illustrating the operation of the clock 10 and the communication device 20 during the competition according to the present embodiment. FIG. 12 is a diagram showing an example of current waveforms of the clock 10 and the communication device 20 during the competition according to the present embodiment. In FIG. 12, the horizontal axis is time. The waveform g30 is a current waveform flowing through the communication device 20. The waveform g31 is a current waveform that flows through the communication device 20 at the time of transmission. The waveform g32 is a current waveform that flows through the communication device 20 at the time of reception. The waveform g40 is a current waveform flowing through the clock 10. The waveform g41 is a current waveform that flows through the clock 10 at the time of reception. The waveform g42 is a current waveform that flows through the clock 10 at the time of transmission.

As shown in the waveform g31, the communication device 20 transmits an advertising packet at times t52 to t53, t61 to t63, and t72 to t73.
As shown in the waveform g32, the communication device 20 receives an advertising packet when a radio wave can be detected at times t54 to t59 and t66 to t69.

As shown in the waveform g41, the clock 10 receives an advertising packet when a radio wave can be detected at times t51 to t55, t58 to t60, t65 to t67, and t71 to t74.
As shown in the waveform g42, the clock 10 transmits an advertising packet at times t56 to t57, t62 to t64, t68 to t69, and t75 to t76.

As shown in FIGS. 11 and 12, each of the clock 10 and the communication device 20 constantly transmits and scans advertisement packets.
Specifically, as shown in FIG. 12, each of the clock 10 and the communication device 20 alternately transmits and scans advertisement packets at a predetermined cycle, for example. The transmission cycle of the advertisement packet is set as a cycle in which the transmission cycle from the clock 10 and the transmission cycle from the communication device 20 are different. Further, the scan cycle is set as a cycle in which the scan cycle of the clock 10 and the scan cycle of the communication device 20 are different. Both of these may be set as the same cycle. Further, the transmission cycle and the scan cycle of the advertisement packet are set as different cycles from each other. In addition, both may be set as the same cycle.
The clock 10 measures when an advertising packet from the communication device 20 can be received during scanning (time t51 to t55, t71 to t74), and measures at the next transmission timing (time t56 to t57, t75 to t76). Send time information.
When the communication device 20 can receive the advertising packet from the communication device 20 during scanning (time t54 to t59, t66 to t70), the communication device 20 receives the measurement time information transmitted by the clock 10.
As described above, in the present embodiment, the clock 10 and the communication device 20 each transmit the advertisement packet without establishing the communication, and receive the advertisement packet when it can be received.

If a connection is established and communication is performed, the communication may be disconnected if the clock 10 and the communication device 20 are separated from each other for a long distance during running. When the communication is disconnected in this way, it takes time to reconnect, and the lap time is missed. Therefore, in the present embodiment, in order to eliminate such omission of lap time and the like, bidirectional communication is performed only by transmitting and scanning the advertisement packet. As a result, according to the present embodiment, the number of simultaneous connections is not limited.

The control unit 101 of the clock 10 receives the communication signal from the communication device 20, and extracts the identification information of the communication device 20 from the received communication signal. Then, the control unit 101 measures the time when the communication signal from the communication device 20 is received, and then mask processing which does not perform the measurement even when the communication signal including the same identification information is received again within the predetermined time. It can be performed. The clock 10 can preset a period during which this measurement is not performed as a mask period. The reason for this mask processing is to prevent the re-measurement and the re-transmission of the measurement time information from being performed by detecting the advertising packet again immediately after the transmission of the measurement time information when the athlete passes the goal point. ..

Further, the mask period can be set not only as a predetermined time but also by a predetermined condition. This predetermined condition can be, for example, a condition in which the reception strength of the communication signal falls below the threshold value after the clock 10 receives the communication signal from the communication device 20. In this case, the mask period is a period from the time when the clock 10 receives the communication signal from the communication device 20 to the time when the reception strength of the communication signal falls below the threshold value.
If the mask process is not executed, the number of times the clock 10 and the communication device 20 communicate with each other may be larger than the number of times they approach each other. It is conceivable that if the player cannot completely pass the vicinity of the goal, the communication exceeding the threshold strength may be repeated unnecessarily. Therefore, such an event can be prevented by executing the mask processing. In this case, the number of times the clock 10 and the communication device 20 approach each other is equal to the number of times of communication. This makes it possible to realize a measurement process that can efficiently detect the number of approaches while eliminating the need for extra communication.

Further, it is assumed that the clock 10 measures the time point at which the reception strength reaches the maximum value until the reception strength exceeds the threshold value and the reception strength falls below the threshold value without setting the mask period. It is also possible to realize a measurement process that can efficiently detect the number of approaches.
Further, by not setting the mask period and assuming that the clock 10 measures the intermediate time point of the period from the time when the reception intensity exceeds the threshold value to the time when the reception intensity falls below the threshold value. It is possible to realize a measurement process that can efficiently detect the number of approaches.
It should be noted that the threshold value when the reception intensity exceeds the threshold value and the threshold value when the reception intensity falls below the threshold value can be efficiently set to different values. It is possible to realize a measurement process that can detect the number of approaches.

Next, an example of an image displayed on the display unit 203 of the communication device 20 will be described.
FIG. 13 is a diagram showing an example of an image displayed on the display unit 203 of the communication device 20 according to the present embodiment.
In the example shown in FIG. 13, it is an example of listing and displaying each athlete. The image of the area indicated by the reference numeral d11 is the measurement time information of the athlete name “Tanaka Taro”. The image of the area indicated by the reference numeral d12 is the measurement time information of the athlete name “Yamada Ichiro”. The image of the area indicated by the reference numeral d13 is the measurement time information of the athlete name “Hiroki Sato”.

In the example shown in FIG. 13, the latest lap time (LAP) and split time (SPLIT) when the athlete wearing the clock 10 last passed the goal point where the communication device 20 is installed are displayed. ing. For example, the 36th (No. 36) lap time of the athlete name "Tanaka Taro" is 2:59 (2 minutes 59 seconds), and the split time is 1:47:59 (1 hour 47 minutes 59 seconds). ..
The control unit 201 of the communication device 20 may sort and display, for example, the order of fast split time, the order of slow split time, the order of names (for example, the order of AIUEO, the order of ABC), and the like. In this case, the control unit 201 may cause the display unit 203 to display the image d14 of the button for instructing sorting.

Further, when the measurer detects that the area indicated by the reference numeral d11 is tapped and selected, the control unit 201 lists and displays the measurement time information of the individual athlete as shown in FIG.
FIG. 14 is a diagram showing an example of an image of measurement time information of an individual athlete displayed on the display unit 203 of the communication device 20 according to the present embodiment.
In the example shown in FIG. 14, the control unit 201 displays the images in the order of acquisition. The image of the area indicated by the reference numeral d21 is the athlete name "Tanaka Taro" and the item "LAP (lap time) SPLIT (split time)". The image of the region indicated by the reference numeral d22 has the first lap time “No. 01” and the split time. The image of the region indicated by the reference numeral d23 is the second lap time “No. 02” and the split time. The image of the region indicated by the reference numeral d24 is the third lap time “No. 03” and the split time. The image of the region indicated by the reference numeral d25 is the fourth lap time “No. 04” and the split time. The image of the region indicated by the reference numeral d26 is the fifth lap time “No. 05” and the split time. The image of the area indicated by the reference numeral d27 is an image of a button for instructing sorting.

In addition, either descending order or ascending order may be used, and when the button for instructing sorting is pressed, the sorting may be re-sorted and displayed.
Further, when the distance for one lap (one lap) is input in advance by the measurer, the control unit 201 may calculate the speed of the competitor and display the calculated speed for each lap. good.
Further, when it is detected that the area of reference numeral d21 is tapped and selected, the control unit 201 may make a transition from the display state of the image shown in FIG. 14 to the display state shown in FIG.
When the number of lap times is too large to display on one screen, the control unit 201 scrolls the screen to display by detecting that the operation unit 202 has slid a finger in the vertical direction on the display unit 203. You may do so.

Further, the control unit 201 determines whether the screen state of the communication device 20 has changed from the vertically long state (FIGS. 13 and 14) to the horizontally long state (FIG. 15) based on the sensor detection result detected by the sensor 205. It may be detected and the display screen may be switched according to the detection result.
FIG. 15 is a diagram showing an example of an image displayed when the display unit 203 of the communication device 20 according to the present embodiment is in a horizontally long state. The example shown in FIG. 15 is an example of the image d31 displayed when the communication device 20 is in a horizontally long state while the image of FIG. 14 is displayed.
When the control unit 201 detects that the communication device 20 is in a horizontally long state, it generates an image in which the data shown in FIG. 14 is graphed, and displays the generated image on the display unit 203. In FIG. 15, the horizontal axis is the number of lap time measurements and the vertical axis is the lap time.
The control unit 201 may shift to the display shown in FIG. 14 when the horizontally elongated state shown in FIG. 15 is returned to the vertically elongated state.

Next, an example of an image displayed on the display unit 105 of the clock 10 will be described.
FIG. 16 is a diagram showing an example of an image of measurement time information displayed on the display unit 105 of the clock 10 according to the present embodiment.
In FIG. 16, the image of the region indicated by the reference numeral d41 is an image of the measurement result of the split time (SPLIT). The image of the region indicated by the reference numeral d42 is an image of the measurement result of the lap time (LAP). In the example shown in FIG. 16, the lap time of the 36th time (No. 36) is “0:02:58” (2 minutes 58 seconds), and the split time is “1: 47: 58” (1 hour 47 minutes 58 seconds). ) Is an example.

FIG. 17 is a diagram showing another example of an image of measurement time information displayed on the display unit 105 of the clock 10 according to the present embodiment. The example shown in FIG. 17 is an example in which the displayable resolution of the display unit 105 is higher than the example shown in FIG.
In such a case, the control unit 101 may display a plurality of measured lap times and a plurality of split times as in the image of the region indicated by the reference numeral d51. The example shown in FIG. 17 is an example in which each of the latest four lap times and split times is displayed.

Further, the control unit 101 may switch the image of the region indicated by the reference numeral d51 to the image of the region indicated by the reference numeral d52 and display the image according to the operation result of the operation of the operation unit 104. In such a case, the control unit 101 stores, for example, the latest four lap times and split times that can be displayed on the display unit 105 in the storage unit 106, and graphs the stored information to generate an image. You may do so. Alternatively, the control unit 101 may store all the competition data in the storage unit 106, and read out each of the latest four lap times and split times from the storage unit 106 and display them.

As described above, in the present embodiment, the clock 10 measures the lap time and the split time by using the time when the communication device 20 transmits the communication signal as a trigger of the approaching state, and the measurement result is the communication device by the advertisement packet. I tried to send to 20. As a result, according to the present embodiment, the trigger signal is determined from the increase / decrease in the received signal strength of the short-range wireless communication used for transmitting / receiving the measurement time information as compared with the mat having an antenna in the conventional marathon competition. , The number of antennas for channel identification can be reduced. Further, according to the present embodiment, a large-scale device is not required.
Further, according to the present embodiment, the system can be easily constructed by realizing the trigger point by the program of the communication device 20 such as a tablet terminal.
Further, according to the present embodiment, the watch 10 worn by the athlete may be a general-purpose device such as a smartphone or a smart watch, and by realizing the watch 10 by a program installed in the general-purpose device, a dedicated terminal is not required.

In the above-mentioned example, an example in which the clock 10 and the communication device 20 each constantly transmit and scan advertising packets has been described, but the present invention is not limited to this. After transmitting the measurement time information, the clock 10 may stop the transmission of the advertising packet until the next advertisement packet is received from the communication device 20.

The difference from the above-mentioned processing of each part will be described with reference to FIG.
First, the clock 10 will be described.
When the information processing unit 1012 outputs information indicating that the communication control unit 1013 has detected the response signal, the information processing unit 1012 outputs a transmission stop instruction for stopping the transmission of the communication signal to the communication control unit 1013. The information processing unit 1012 receives a communication signal for the number of approaches, transmits the communication signal, ends the measurement of the lap time and the split time, and outputs a scan end instruction to end the scan to the communication control unit 1013.

The communication control unit 1013 controls the wireless communication control unit 107 to start transmitting a communication signal (advertising packet) to the communication device 20. The communication control unit 1013 controls the wireless communication control unit 107 in response to the transmission stop instruction output by the information processing unit 1012, and ends the transmission of the communication signal. The communication control unit 1013 controls the wireless communication control unit 107 in response to the scan end instruction output by the information processing unit 1012 to end the scan.

Next, the communication device 20 will be described.
When the communication device 20 receives the communication signal including the measurement time information from the clock 10, the communication device 20 transmits the response signal to the clock 10.

When the control unit 201 detects that the start of the competition has been instructed, the control unit 201 controls the wireless communication control unit 207 to start transmitting and scanning a communication signal (advertising packet) including the identification signal of the own device. When the control unit 201 receives the communication signal including the measurement time information from the clock 10, the control unit 201 controls the wireless communication control unit 207 to transmit the response signal to the clock 10. When the control unit 201 detects that the end of the competition has been instructed, the control unit 201 controls the wireless communication control unit 207 to end the transmission of the communication signal (advertising packet) and the scanning operation.

FIG. 18 is a diagram showing an example of an intermittent operation in transmitting measurement time information according to the present embodiment. In the example shown in FIG. 18, the communication device 20 constantly transmits and scans the advertising packet, and the clock 10 constantly scans.
(Step S11) The control unit 101 of the clock 10 detects, for example, a radio wave from the communication device 20 when the radio wave intensity exceeds a threshold value. Subsequently, the control unit 101 measures the lap time and the split time when the radio wave is received, and transmits an advertising packet including ADVERTISING DATA (advertising data) of the measurement time information to the communication device 20.

(Step S12) When the control unit 201 of the communication device 20 can receive the advertising packet transmitted by the clock 10, the identification information and the measurement time information of the clock 10 are extracted from the received advertising packet. Here, the identification information of the clock 10 is an address unique to the wireless communication control unit 107 of the clock 10. Subsequently, the control unit 201 uses the extracted identification information as the transmission destination, and transmits an advertising packet including the identification information of the own device, which is the address of the communication device of the transmission destination and the transmission source, to the clock 10. The control unit 201 sets the PDU type of the advertising packet to SCAN REQUEST (response signal; incidental information transmission request) and transmits the packet. Note that the control unit 201 may load incidental information as a scan request. The incidental information is information indicating that the advertisement packet has been received from the clock 10, for example, instruction information for requesting transmission of the lap time up to the 29th lap when the current 30th lap, and transmission of the sensor detection result detected by the sensor. Instruction information to be requested, instruction information to request re-transmission of measurement time information, and the like.

(Step S13) The control unit 101 of the clock 10 receives the advertising packet set in the SCAN REQUEST transmitted by the communication device 20 as a response signal, and extracts the identification information of the communication device 20 and the PDU Type from the received advertising packet. .. Subsequently, the control unit 101 determines that the SCAN REQUEST includes the source and destination addresses, and therefore is requested by the communication device 20, that is, the communication device 20 has received the measurement time information. Subsequently, the control unit 101 sets the PDU type of the advertising packet to SCAN RESPONSE DATA (scan response data) for transmission, and stops the transmission of the advertisement packet after transmission.

When the radio wave from the communication device 20 can be detected when the radio wave strength exceeds the threshold value, the control unit 101 returns to the process of step S11 and restarts the transmission of the advertisement packet. Such an operation is referred to as an intermittent operation in the embodiment.

Further, when the communication device 20 transmits the incidental information as the SCAN REQUEST, the control unit 101 of the clock 10 transmits the information including the information requested to the SCAN RESPONSE DATA. The control unit 201 of the communication device 20 extracts information from the received communication signal. Using the value of the received information detected by the acceleration sensor, the control unit 201 may calculate the number of steps using the lap time and the acceleration, and may calculate the pitch, stride (step length), etc. from the calculated number of steps. .. Then, the control unit 201 may store the calculated value in the storage unit 204 and display it on the display unit 203. The number of steps, pitch, and stride may be calculated by the control unit 101 of the clock 10. In this case, the incidental information may be instructional information requesting transmission of the number of steps, pitch, and stride.

FIG. 19 is a sequence diagram of the clock 10 and the communication device 20 in the intermittent operation according to the present embodiment.
FIG. 8 is a sequence diagram of the clock 10 and the communication device 20 in the intermittent operation according to the present embodiment.
(Step S21) The control unit 201 of the communication device 20 starts transmitting an advertising packet after the start of the competition. After that, the control unit 201 constantly transmits and scans the advertising packet.

(Step S22) The control unit 101 of the clock 10 detects and receives radio waves from the communication device 20.
(Step S23) The control unit 101 of the clock 10 starts measurement. Subsequently, the control unit 101 transmits an advertising packet which is ADVERTISING DATA including measurement time information.

(Step S24) The control unit 201 of the communication device 20 detects the radio wave transmitted by the clock 10 and receives the advertising packet.
(Step S25) When the identification information and the measurement time information of the clock 10 can be extracted from the received advertising packet, the control unit 201 of the communication device 20 transmits an advertising packet in which the PDU Type is set to SCAN REQUEST.

(Step S26) The control unit 101 of the clock 10 receives the advertising packet set in the SCAN REQUEST transmitted by the communication device 20.
(Step S27) When the PDU Type of the received advertising packet is SCAN REQUEST, the control unit 101 of the clock 10 extracts incidental information included in SCAN REQUEST. Subsequently, the control unit 101 transmits information according to the incidental information as an advertising packet in which the PDU Type is set to SCAN RESPONSE DATA.

(Step S28) The control unit 201 of the communication device 20 receives the SCAN RESPONSE DATA transmitted by the clock 10. The control unit 201 extracts the incidental information and the identification information from the received SCAN RESPONSE DATA, associates the identification information with the incidental information, and stores the incidental information in the storage unit 204.

(Step S29) The control unit 101 of the clock 10 stops the transmission of the advertisement packet after transmitting the advertising packet in which the PDU Type is set to SCAN RESPONSE DATA.

(Step S30) The control unit 101 of the clock 10 stops scanning for a predetermined time. Alternatively, even if the control unit 101 receives the advertising packet after transmitting the SCAN RESPONSE DATA, if the identification information is the communication device 20, the control unit 101 does not perform the measurement and the transmission of the advertisement packet for a predetermined time. The reason for the processing of step S28 is to prevent the processing of step S22 from being performed by detecting the advertising packet after the transmission of the measurement time information when the athlete passes the goal point.

(Step S31) The control unit 201 of the communication device 20 transmits an advertising packet.
(Step S32) The control unit 101 of the clock 10 restarts the scan after a predetermined time. This predetermined time may be a predetermined time as in the mask period TM (FIG. 7), or may be a time including a period until the radio wave becomes equal to or less than the threshold value.

After that, the control unit 101 of the clock 10 and the control unit 201 of the communication device 20 repeat the processes of steps S21 to S32 every time the clock 10 equipped with the clock 10 passes the goal point. That is, the clock 10 measures when a radio wave from the communication device 20 is detected at the goal point, transmits the measurement time information by including it in the advertisement packet, and then receives a response signal from the communication device 20 to transmit the advertisement packet. Stop sending. As described above, the clock 10 transmits the advertisement packet when the measurement and the measurement result are transmitted at the goal point, and the transmission is stopped for a period other than the goal point. Then, when the clock 10 goes around and the radio wave is detected again at the goal point, the clock 10 resumes the transmission of the advertisement packet.
Then, the control unit 101 of the clock 10 ends the measurement when it passes in front of the goal a set number of times. The control unit 201 of the communication device 20 ends the transmission and scanning of the advertising packet when the measurer operates the operation unit 202 to set the end of the competition.

Here, consider a case where a plurality of competitors are running on the track at the same time. When a plurality of athletes pass through the goal point almost at the same time, if each of the clocks 10 worn by the plurality of athletes constantly sends an advertisement packet, the clocks 10 of the athletes may interfere with each other. be.

On the other hand, the clock 10 and the communication device 20 of the present embodiment transmit each other including information other than the identification information in the communication signal (advertising packet), and do not perform the communication establishment (pairing) process. As a result, the clock 10 transmits the advertising packet including the measurement time information only when it is necessary to transmit the measurement time information without maintaining the communication with the communication device 20.

As described above, in the present embodiment, the clock 10 measures the lap time and the split time by using the time when the communication device 20 transmits the communication signal as a trigger of the approaching state, and the measurement result is the communication device by the advertisement packet. I tried to send to 20. Then, after the measurement time data is transmitted, the advertisement packet of the clock 10 is not transmitted. As a result, according to the present embodiment, since the clock 10 worn by the athlete is transmitted only when necessary, interference between the clocks 10 on the athlete side can be reduced. Further, according to the present embodiment, the clock 10 transmits the advertisement packet only when necessary, so that the power consumption is saved.

Further, by the processing of step S30 and step S32, the control unit 101 measures the time and transmits the measurement time information even when the advertising packet is transmitted at the passing goal point after the transmission of the SCAN RESPONSE DATA. Therefore, it is possible to reduce interference between the clocks 10. Further, by the processing of step S29 and step S31, the control unit 101 measures the time and transmits the measurement time information even when the advertising packet is transmitted at the passing goal point after the transmission of the SCAN RESPONSE DATA. Therefore, the power consumption of the clock 10 can be reduced.

<Modification example>
In the above-mentioned example, an example in which the clock 10 transmits an advertising packet including measurement time information to the communication device 20 has been described, but in the following modification, an example in which the measurement time information is encrypted and transmitted will be described. Also in the modified example, an example in which the communication method is BLE will be described.

FIG. 20 is a diagram for explaining the outline of the measurement system 1A in the modified example of the present embodiment. As shown in FIG. 20, the measurement system 1A includes one or more clocks 10A (first clock 10-1, second clock 10-2, ...; second communication device) and communication device 20A (second communication device). 1 communication device) and is included. Further, the communication device 20X is a device not included in the measurement system 1A.

As shown in FIG. 20, there is a possibility that a third party who owns the communication device 20X may intercept the measured time information of the athlete running the track. Since the transmission signal transmitted by the clock 10A contains the record and personal information of the athlete, it is not preferable to be intercepted.
Therefore, in the modified example, the clock 10A transmits the encrypted measurement time to the communication device 20A in order to prevent the measurement time information from being intercepted by a third party.

The configuration of the clock 10A is the same as that of the clock 10 (FIG. 3). Further, the configuration of the communication device 20A is the same as that of the communication device 20 (FIG. 3).
The storage unit 204 of the communication device 20A further stores the private key and the public key.
The control unit 201 of the communication device 20A transmits a communication signal (advertising packet) including the identification information and the public key via the wireless communication control unit 207 and the antenna 206. Further, the control unit 201 combines the encrypted measurement time information included in the communication signal received from the clock 10A by using the secret key stored in the storage unit 204.

The storage unit 106 of the clock 10A stores the identification information of the communication device 20A.
The control unit 101 of the clock 10A further stores the public key received via the antenna 108 and the wireless communication control unit 107 in the storage unit 106. The control unit 101 detects a radio wave from the communication device 20A, for example, when the radio wave intensity exceeds the threshold value. When the radio wave is received, the control unit 101 measures the lap time and the split time, and encrypts the measurement time information using the public key stored in the storage unit 106. The control unit 101 transmits an advertising packet including encrypted measurement time information to the communication device 20A.

Next, an example of data transmitted by the communication device 20A to the clock 10A will be described.
FIG. 21 is a diagram showing an example of data transmitted by the communication device 20A to the clock 10A in the modified example of the present embodiment. Further, FIG. 21 shows an extracted AdvData in the advertising packet in BLE. In the modification, the data is used as "Manufactureer Specific Data" in the advertising packet, and the communication device 20A including the identification information and the public key transmits the clock 10A.

Next, an example of data transmitted by the clock 10A to the communication device 20A will be described.
FIG. 22 is a diagram showing an example of data transmitted by the clock 10A to the communication device 20A in the modified example of the present embodiment. Further, FIG. 22 shows an extracted AdvData in the advertising packet in BLE. In the modified example, the data is used as "Manufactureer Specific Data" in the advertising packet, and the clock 10A transmits to the communication device 20A including the measurement time information encrypted by using the public key.

Next, a communication example between the clock 10A and the communication device 20A in the modified example will be described.
FIG. 23 is a diagram showing a communication example between the clock 10A and the communication device 20A in the modified example of the present embodiment.

(Step S101) The control unit 201 of the communication device 20A transmits a communication signal (advertising packet) including the identification information and the public key via the wireless communication control unit 207 and the antenna 206.

(Step S102) The control unit 101 of the clock 10A stores the public key included in the communication signal received via the antenna 108 and the wireless communication control unit 107 in the storage unit 106. The control unit 101 may store the public key in the storage unit 106 when the identification information included in the received communication signal matches the identification information stored in the storage unit 106.

(Step S103) The control unit 201 of the communication device 20A starts transmitting an advertising packet after the start of the competition. After that, the control unit 201 constantly transmits and scans the advertising packet.

(Step S104) The control unit 101 of the clock 10A detects, for example, a radio wave from the communication device 20A when the radio wave intensity exceeds a threshold value.

(Step S105) When the control unit 101 of the clock 10A receives the radio wave, the measurement of the lap time and the split time is started, and the measured measurement time information is encrypted by using the public key stored in the storage unit 106. Subsequently, the control unit 101 transmits an advertising packet including the encrypted measurement time information to the communication device 20A.

(Step S106) The control unit 201 of the communication device 20A detects the radio wave transmitted by the clock 10A and receives the advertising packet. Subsequently, the control unit 201 decrypts the encrypted measurement time information included in the received advertising packet by using the secret key stored in the storage unit 204.

After that, the control unit 101 of the clock 10A and the control unit 201 of the communication device 20A repeat the processes of steps S103 to S106.
The control unit 101 of the clock 10A and the control unit 201 of the communication device 20A perform the processes of steps S25 to S32 after the process of step S106, as described with reference to FIG. 19, and then the processes of steps S103 to S106. You may repeat the process of.

As described above, in the modified example, the communication device 20A that stores the private key transmits the public key to the clock 10A, and the clock 10A transmits the measurement time information encrypted using the public key. As a result, even if a third party who owns the communication device 20X that does not store the private key intercepts the data including the measurement time information, the communication device 20X cannot decode the received measurement time information. As a result, according to the modified example, it is possible to prevent the interception of the measurement time information by a third party.

Further, in the above-mentioned example, the example in which the communication device 20A transmits the public key to the clock 10A has been described, but the present invention is not limited to this. The control unit 201 of the communication device 20A may encrypt the public key using, for example, a common key, and transmit the encrypted public key to the clock 10A. In this case, the storage unit 106 of the clock 10A stores the common key. Further, the storage unit 204 of the communication device 20A stores the common key. Thereby, according to the present embodiment, the security of information can be further enhanced.

In the example described with reference to FIG. 23, for example, an example in which the communication device 20A transmits the public key to the clock 10A at the start of the competition has been described, but the present invention is not limited to this. The control unit 201 of the communication device 20A may update the public key and the private key at any timing and replace them at the time of update. Further, the updated public key may be retransmitted to the clock 10A. Thereby, according to the present embodiment, the security of information can be further enhanced.
The control unit 201 of the communication device 20A may further encrypt the public key updated in this way with a common key and transmit the key.

Further, in the above-mentioned example, an example in which a public key and a private key are used has been described, but the present invention is not limited to this. The communication device 20A and the clock 10A may use other encryption methods.

In the above-mentioned example, the example in which the clock 10 (or 10A) and the communication device 20 (or 20A) are used for measuring the time in the competition in which the athlete runs the track has been described, but the present invention is not limited to this. The clock 10 (or 10A) and the communication device 20 (or 20A) may be applied to, for example, a system for managing attendance. In such a communication measurement system, when an employee wearing a clock 10 (or 10A) receives an advertisement from a communication device 20 (or 20A) which is a time card device, time is measured and the time information measured is used as the communication device. Send to 20 (or 20A). Then, the communication device 20 (or 20A) stores the identification information of the clock 10 (or 10A) in advance in the storage unit 204 in association with the employee number, the name, and the like. Then, the communication device 20 (or 20A) manages the attendance time and the leaving time by storing the received time information in association with the employee number and the name. Even in this case, the clock 10 (or 10A) stops transmitting the advertisement packet after receiving the response signal from the communication device 20 (or 20A). As a result, the clock 10 (or 10A) of the embodiment communicates only when passing in front of the communication device 20 (or 20A) which is a time card device, so that the clock 10 (or 10A) worn by each of the plurality of employees is worn. It is possible to reduce interference between each other and reduce power consumption. The clock 10 (or 10A) may be a dedicated communication device including the components shown in FIG.

In the above-mentioned example, the example in which the clock 10 (or 10A) transmits the measurement time information each time it passes the goal point has been described, but the present invention is not limited to this. The control unit 101 of the clock 10 (or 10A) measures each time the goal point is passed, and stores the measured measurement time information in the storage unit 106. Then, after the set number of measurement times is completed, the control unit 101 reads out all the measurement time information from the storage unit 106, and collectively transmits all the read measurement time information to the communication device 20 (or 20A). May be good.

In the above-mentioned example, an example of using BLE communication as an example of proximity radio has been described, but the present invention is not limited to this. It is possible for each of the watch 10 (or 10A) and the communication device 20 (or 20A) to transmit a communication signal without establishing communication between the watch 10 (or 10A) and the communication device 20 (or 20A). It may be another proximity radio.

In the above-mentioned example, an example in which the clock 10 (or 10A) and the communication device 20 (or 20A) do not establish communication (do not pair) has been described, but the present invention is not limited to this. For example, if the track is small, or if the radio wave strength transmitted by the clock 10 (or 10A) and the communication device 20 (or 20A) is strong, or if the disconnection is not cut during the competition after establishing communication, The clock 10 (or 10A) and the communication device 20 (or 20A) may establish communication.

Further, in the above-mentioned example, the control unit 101 of the clock 10 (or 10A) has described an example in which the measured lap time, split time, and the like are transmitted as measurement time information, but the present invention is not limited to this. As the measurement time information, the control unit 101 may transmit a predetermined time, for example, a time such as 0 or 100 hours, which is not limited to the lap time or the split time, as the measurement time information. In this case, when the control unit 201 of the communication device 20 (or 20A) receives a communication signal from the clock 10 (or 10A), or detects when the reception strength of the communication signal is equal to or higher than a predetermined threshold value. The time may be measured and the measured time may be stored in the storage unit 204. The control unit 201 calculates the lap time and split time for each clock 10 (or 10A) using the stored time, and stores the calculated lap time and split time for each clock 10 (or 10A) in the storage unit 204. You may do it. The communication device 20 (or 20A) is provided with a time measuring unit (not shown) to perform time counting. Alternatively, the communication device 20 (or 20A) may include a communication circuit (not shown), and the communication circuit may acquire time information from a base station such as a mobile phone communication network.

Alternatively, the control unit 201 of the communication device 20 (or 20A) may measure the lap time or the split time by measuring the time when the communication signal transmitted by the clock 10 (or 10A) is detected. good. In this case, the clock 10 (or 10A) corresponds to the first communication device, and the communication device 20 (or 20A) corresponds to the second communication device. In this case as well, the communication device 20 (or 20A) includes an oscillation circuit (not shown), a frequency dividing circuit, and a time measuring unit, and performs time counting.

Further, in the example shown in FIG. 19, an example in which scanning is interrupted in steps S30 and S32 has been described, but the present invention is not limited to this, and steps S30 and S32 can be omitted.
Further, the control unit 101 of the clock 10 (or 10A) may also transmit information based on the sensor detection value detected by the sensor 109. For example, the control unit 101 may acquire the pulse rate detected by the sensor 109 and transmit it as an advertisement packet together with the measured measurement time information. In this way, when the communication signal includes a pulse rate or the like, the control unit 201 of the communication device 20 (or 20A) extracts the pulse rate and displays it together with the measured value for each player in FIG. 13, for example. It may be displayed on the unit 203.

In the above-mentioned example, an example applied to a competition in which a competitor goes around a track has been described, but the present invention is not limited to this. For example, as in a marathon, there may be a plurality of measurement points, and a communication device 20 (or 20A) may be installed at each measurement point. In such a case, the plurality of communication devices 20 (or 20A) installed at the measurement points may share the number of approaches and measurement data with each other using, for example, a communication line.
In the above example, the state where the reception intensity exceeds the threshold value does not exclude the state where the reception intensity exceeds the threshold value, and the state where the reception intensity falls below the threshold value is the state below the threshold value. It does not exclude the state of becoming. Further, a state in which the reception strength is equal to or higher than the threshold value does not exclude a state in which the reception strength exceeds the threshold value, and a state in which the reception strength is lower than the threshold value does not exclude a state in which the reception strength is lower than the threshold value. It is a thing.

A program for realizing a part or all of the functions of the control unit 101 of the clock 10 (or 10A) and the control unit 201 of the communication device 20 (or 20A) in the present invention is recorded on a computer-readable recording medium. Even if the program recorded on this recording medium is read into a computer system and executed, the processing performed by the control unit 101 of the clock 10 (or 10A) and the control unit 201 of the communication device 20 (or 20A) is performed. good. The term "computer system" as used herein includes hardware such as an OS and peripheral devices. Further, the "computer system" shall also include a WWW system provided with a homepage providing environment (or display environment). Further, the "computer-readable recording medium" refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, or a CD-ROM, and a storage device such as a hard disk built in a computer system. Furthermore, a "computer-readable recording medium" is a volatile memory (RAM) inside a computer system that serves as a server or client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, it shall include those that hold the program for a certain period of time.

Further, the program may be transmitted from a computer system in which this program is stored in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the "transmission medium" for transmitting a program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. Further, the above program may be for realizing a part of the above-mentioned functions. Further, a so-called difference file (difference program) may be used, which can realize the above-mentioned function in combination with a program already recorded in the computer system.

1,1A ... Measurement system, 10,10A ... Clock, 20,20A ... Communication equipment, 101 ... Control unit, 102 ... Oscillation circuit, 103 ... Dividing circuit, 104 ... Operation unit, 105 ... Display unit, 106 ... Storage unit , 107 ... Wireless communication control unit, 108 ... Antenna, 109 ... Sensor, 110 ... Battery, 1011 ... Measuring unit, 1012 ... Information processing unit, 1013 ... Communication control unit, 201 ... Control unit, 202 ... Operation unit, 203 ... Display Unit, 204 ... Storage unit, 205 ... Sensor, 206 ... Antenna, 207 ... Wireless communication control unit, 208 ... Battery, 209 ... Oscillation circuit, 210 ... Divider circuit

Claims (14)

In a time measurement system including a first communication device that is a fixed station and a second communication device that is a mobile station that communicates with the first communication device.
The first communication device is
A first communication unit for transmitting a communication signal to the second communication device is provided.
The second communication device is
A timekeeping unit that measures time,
The second communication unit that receives the communication signal and
A control unit whose measurement time is the time measured by the timekeeping unit when the second communication device is in close proximity to the first communication device according to the reception state of the communication signal received by the second communication unit. ,
Time measurement system equipped with. The first communication unit is
The first transmission radio wave as the communication signal is transmitted,
A first reception period for receiving radio waves from the second communication device is provided.
The second communication unit is
A second reception period for receiving the first transmission radio wave from the first communication device is provided.
The second communication device is
A storage unit that stores the time measured by the timekeeping unit as the measurement time when the control unit is in the approaching state during the second reception period is provided.
The second communication unit is
The measured time stored in the storage unit is transmitted to the first communication device as a second transmission radio wave.
The time measurement system according to claim 1. When the control unit of the second communication device receives the first transmission radio wave from the first communication device, and the reception intensity when receiving the first transmission radio wave becomes a predetermined threshold value or more. Time, an intermediate time point between the time when the reception intensity when receiving the first transmission radio wave exceeds the predetermined threshold and the time when the reception intensity falls below the predetermined threshold, and the first. At least one of the time when the reception strength becomes maximum from the time when the reception strength when receiving the transmitted radio wave exceeds the predetermined threshold to the time when the reception strength falls below the predetermined threshold. The measurement time determined to be in the approaching state.
The time measurement system according to claim 1 or 2. The first transmitted radio wave includes the identification information of the first communication device, and includes the identification information.
The second transmission radio wave includes the identification information of the first communication device and the information regarding the measurement time.
The time measurement system according to claim 2. The first communication device transmits the first transmission radio wave including the identification information of the first communication device and the public key, and the secret key is the encrypted information about the measurement time received from the second communication device. Complex using
The control unit of the second communication device encrypts the information regarding the measurement time by using the public key included in the received first transmission radio wave.
The time measurement system according to claim 4, wherein the second communication unit of the second communication device transmits the second transmission radio wave including encrypted information about the measurement time to the first communication device. The first communication device according to claim 5, wherein the public key is encrypted by using a common key, and the first transmission radio wave including the public key encrypted with the identification information of the first communication device is transmitted. Time measurement system. The time measurement system according to claim 5 or 6, wherein the first communication device updates the public key and the private key at an arbitrary timing. The first communication unit is
When it is time to start the competition, or when the signal for starting the competition is acquired from the outside, the transmission of the communication signal is started.
The time measurement system according to any one of claims 1 to 7. The control unit of the second communication device is
When the number of times determined to be in the approaching state reaches a predetermined number, the measurement of the measurement time is terminated, and the transmission of the measurement time to the first communication device is terminated.
The time measurement system according to any one of claims 1 to 8. When the measurement time is measured, the control unit does not perform the measurement for a predetermined period until a predetermined time elapses, or until the communication signal is further received under predetermined conditions.
The time measurement system according to any one of claims 1 to 9. The first communication unit periodically transmits a transmission radio wave having a transmission period at each transmission interval, and when the response radio wave to the transmission radio wave from the second communication device is received within the transmission period, the transmission is performed. Do not transmit the next transmitted radio wave that has passed the interval,
The time measurement system according to any one of claims 1 to 10. The second communication device is portable to the athlete and is portable.
The first communication device is used at the same time as the use of the second communication device in the competition space where the athlete competes.
The time measurement system according to any one of claims 1 to 11. To the computer of the first communication device, which is a fixed station ,
The procedure for transmitting a communication signal to a second communication device that is a mobile station and has a timekeeping function ,
The procedure for receiving the measured time transmitted by the second communication device, and
The procedure for storing the received measurement time and
The procedure for displaying the plurality of stored measurement times and the procedure for displaying the measured times.
The program of the first communication device to execute. To the computer of the second communication device, which is a mobile station and has a timekeeping function ,
The procedure for receiving the communication signal transmitted by the first communication device , which is a fixed station, and
A procedure for starting measurement of the measurement time when the communication signal is first received, or when the reception strength when the communication signal is received exceeds a predetermined threshold value, and
When the communication signal is received for the second time or later, or when the reception strength when the communication signal is received exceeds a predetermined threshold value for the second time or later, the procedure for measuring the measurement time and the procedure for measuring the measurement time.
A procedure for transmitting the measured time to the first communication device and
The program of the second communication device to execute.

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