Data measurement system and method for performing data processing of measurement data

Abstract

A data measurement system (10) includes a plurality of measurement devices (130), a data processing device (150), and a transmitter (110) for transmitting a trigger signal. The trigger signal includes a first pulse group corresponding to a start timing of data processing and a second pulse group corresponding to an end timing. The data processing device processes the measurement data measured between the start timing and the end timing so that the measurement data are time-matched. The first pulse group and the second pulse group include a first pulse and a second pulse having different pulse widths, respectively. The start timing and the end timing are timings separated by a first predetermined time from the generation of the first pulse in the first pulse group and the second pulse group, respectively, or timings separated by a second predetermined time from the generation of the second pulse.

Description

Technical Field

[0001] The present invention relates to a data measurement system and a method for executing data processing of measured data, and more particularly to a technology for synchronizing and presenting data measured by a plurality of measurement devices in a time series. Background Art

[0002] In recent years, research related to human motion analysis has been ongoing. For example, the following non-patent document 1 introduces a system that visualizes the work posture based on multiple motion sensors and biosensors installed on the worker and images of the worker during work. The purpose of the system shown in non-patent document 1 is to improve the work environment and seek to improve productivity by identifying and analyzing the load applied to the worker during work.

[0003] Furthermore, a sight line measurement device as an example of a biosensor applicable to the above-mentioned system is disclosed in Non-Patent Document 2. The sight line measurement device disclosed in Non-Patent Document 2 includes an input terminal for an external signal for starting and ending measurement.

[0004] Prior art literature

[0005] Non-patent literature

[0006] Non-patent literature 1: Creact’s CAPTIV-L7000 solution, https: / / www.creact.co.jp / item / measure / ergonomics / captiv-l7000 / l7000-top

[0007] Non-patent document 2: Tobii Pro Glasses 2 User's Manual (User Manual) from Tobii, https: / / www.tobiipro.com / siteassets / tobii-pro / user-manuals / tobii-pro-glasses-2-user-manual.pdf / ?v=1.1.3 Summary of the invention

[0008] Technical problem to be solved by the invention

[0009] In the motion analysis as described above, it is important to understand the time series relationship between the image information for recording the motion of the subject, the biological information showing the state of the subject such as body temperature and pulse, and the environmental information showing the state of the environment the subject is in such as air temperature and noise. On the other hand, this information is often obtained by a separate measuring device such as a camera, a biological sensor, and a temperature and humidity sensor.

[0010] As a method for synchronizing measurement data acquired by multiple measurement devices in time series, there is a method of broadcasting a common trigger signal from a specific transmitter to multiple measurement devices by wireless, so that the timing of the trigger signal included in the measurement data recorded in each measurement device is consistent, thereby synchronizing the multiple measurement data. In such a case, if the trigger signal from the transmitter cannot be correctly received in the measurement device due to a temporary radio wave failure, etc., the recorded measurement data cannot be synchronized in the subsequent processing.

[0011] The present invention has been made to solve the above-mentioned technical problems, and an object of the present invention is to more reliably synchronize the acquired measurement data in time series in a system that collects and presents measurement data acquired from a plurality of measurement devices.

[0012] Solutions for solving the above technical problems

[0013] According to one aspect of the present invention, a data measurement system comprises a plurality of measurement devices, a data processing device that performs data processing of data acquired from the plurality of measurement devices, and a transmitter that transmits a trigger signal related to the data processing to the plurality of measurement devices by wireless. The trigger signal includes a first pulse group corresponding to the start timing of the data processing and a second pulse group corresponding to the end timing of the data processing. The data processing device acquires data measured between the above-mentioned start timing and the above-mentioned end timing, and processes the measurement data of the plurality of measurement devices so that the start timings and the end timings in the acquired data coincide in time. The first pulse group and the second pulse group respectively include a first pulse and a second pulse that are continuously transmitted at a predetermined interval. The first pulse and the second pulse have different pulse widths. The start timing is a timing separated by a first predetermined time from the generation of the first pulse in the first pulse group, or a timing separated by a second predetermined time from the generation of the second pulse. The end timing is a timing separated by a first predetermined time from the generation of the first pulse in the second pulse group, or a timing separated by a second predetermined time from the generation of the second pulse.

[0014] According to another embodiment of the present invention, the method relates to a method for performing data processing of measured data in a data measurement system including a plurality of measuring devices. The data measurement system includes a transmitter for transmitting a trigger signal related to data processing and a data processing device. The trigger signal includes a first pulse group corresponding to the start timing of the data processing and a second pulse group corresponding to the end timing of the data processing. The method includes: i) a step of transmitting a trigger signal to a plurality of measuring devices by wireless using a transmitter; ii) a step of acquiring data measured between the above-mentioned start timing and the above-mentioned end timing in the data processing device; iii) a step of processing the measurement data of a plurality of measuring devices in the data processing device so that the start timings and the end timings in the acquired data are time-matched. The first pulse group and the second pulse group respectively include a first pulse and a second pulse that are continuously transmitted at a predetermined interval. The first pulse and the second pulse have different pulse widths from each other. The start timing is a timing separated by a first predetermined time from the generation of the first pulse in the first pulse group, or a timing separated by a second predetermined time from the generation of the second pulse. The end timing is a timing when a first predetermined time has elapsed from the generation of the first pulse in the second pulse group, or a timing when a second predetermined time has elapsed from the generation of the second pulse.

[0015] Effects of the Invention

[0016] According to the data measurement system of the present invention, among the measurement data respectively obtained from a plurality of measurement devices, for the data between the start timing and the end timing based on the trigger signal (first pulse group, second pulse group) sent from a common transmitter, the start timing and the end timing are made to coincide with each other in time and processed. At this time, the first pulse group and the second pulse group of the trigger signal respectively contain two pulse signals (first pulse, second pulse) with different pulse widths, and the start timing and the end timing are respectively set by the timing separated by the first prescribed time from the generation of the received first pulse, or the timing separated by the second prescribed time from the generation of the received second pulse. Thus, as long as at least one pulse signal included in the trigger signal can be received in each measurement device, the measurement data can be synchronized in the data processing device. Therefore, the time series of the acquired measurement data can be synchronized more reliably. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an overall block diagram of a data measurement system according to an embodiment.

[0018] Figure 2 This is a diagram for explaining the relationship between measurement data and marker signals in a measurement device.

[0019] Figure 3 This is a diagram for explaining the relationship between each measurement data and the marker signal in the case of a plurality of measurement devices.

[0020] Figure 4 This is a diagram showing an example of a waveform when a marker signal is superimposed on measurement data.

[0021] Figure 5 A diagram for explaining a marker signal in a camera image.

[0022] Figure 6 It is a diagram for explaining a trigger signal in a comparative example.

[0023] Figure 7 This is a diagram for explaining a trigger signal in the data measurement system according to the embodiment.

[0024] Figure 8 This is a diagram for explaining the relationship between a trigger signal and a synchronization timing in the data measurement system according to the embodiment.

[0025] Fig. 9 This is a flowchart for explaining the processing of each device in the data measurement system.

[0026] Fig.10 1 is a diagram showing a data measurement system according to Modification 1.

[0027] Fig.11 This is a diagram showing a data measurement system according to Modification 2. DETAILED DESCRIPTION

[0028] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the same reference numerals are given to the same or corresponding parts in the drawings, and their repeated description will not be repeated.

[0029] [Data measurement system configuration]

[0030] Figure 1 1 is an overall block diagram of the data measurement system 10 according to the embodiment. Figure 1 The data measurement system 10 includes a signal transmitter 110, a plurality of signal receivers 120A, 120B, and 120X (hereinafter collectively referred to as "signal receivers 120"), measuring devices 130A and 130B, cameras 130X and 130Y, a data processing device 150, and a display device 160. In the following description, the measuring devices 130A, 130B and the cameras 130X and 130Y are collectively referred to as "measuring devices 130". The data measurement system 10 synchronizes and displays the measurement data including image data acquired from the plurality of measuring devices 130 in a time series. The data measurement system is used, for example, to observe and analyze the relationship between an event received by a subject or an observed object and a state change caused by the event in the subject or the object.

[0031] The signal transmitter 110 transmits a trigger signal for synchronizing the measurement data in the plurality of measurement devices 130. The signal transmitter 110 uses, for example, wireless communication and / or wired communication to simultaneously transmit (broadcast) a pulse-shaped trigger signal. In the present embodiment, the trigger signal is not a start signal or a measurement start signal for each measurement device, but a signal for determining the measurement object period in each measurement device, and is transmitted at the beginning and end of the measurement object period. Basically, the trigger signal is transmitted during the period when each measurement device 130 is started and the measurement is performed. In addition, the trigger signal is not necessarily limited to a pulse signal, but may also be a signal having a specific pattern such as a sine wave, or a data packet signal containing ID data for identification, etc.

[0032] The signal receiver 120 is configured to receive a trigger signal transmitted from the signal transmitter 110. In response to receiving the trigger signal, the signal receiver 120 transmits a marker signal corresponding to the trigger signal to the measurement device 130.

[0033] exist Figure 1 In the example of , the signal receiver 120A is connected to the measuring device 130A, and the signal receiver 120B is connected to the measuring device 130B. In this case, the signal receivers 120A and 120B send the received trigger signals to the measuring devices 130A and 130B, respectively. In addition, when the trigger signal is a pulse signal, the received trigger signal is transmitted as it is from the signal receiver 120 to the measuring device 130. When the trigger signal is a signal in a form other than a pulse signal, the trigger signal is converted into a pulse signal by the signal receiver 120 and sent to the measuring device 130.

[0034] In addition, the signal receiver may be configured independently for each measuring device, or the signal from one signal receiver may be sent to two or more measuring devices. As described later, in the measuring devices 130A and 130B, the signal sent from the signal receivers 120A and 120B is stored in the storage device 133 in a time series together with the measurement data.

[0035] The signal receiver 120X is a light-emitting device having a light-emitting unit such as an LED (not shown). The signal receiver 120X turns on or off the light-emitting unit in response to receiving a trigger signal. In the case where the measuring device is a camera, it is impossible to store the pulse signal as a signal independent of the image data. By configuring the signal receiver 120X in advance within the field of view of the camera, the change (lighting / extinguishing) of the light-emitting unit is recorded in the continuous image frame. Therefore, the timing of the change of the light-emitting unit can be used to synchronize the measurement data.

[0036] The measuring devices 130A and 130B are, for example, environmental sensors for detecting the state of the environment in which the subject or the object is placed, such as temperature, air pressure, humidity, and noise, and / or biosensors for detecting the state of the subject, such as body temperature, pulse, respiration, heart rate, brain wave, line of sight, cerebral blood flow, and acceleration. The measuring devices 130A and 130B include a CPU 131, a detection unit 132, and a storage device 133, respectively. The CPU 131 is a control device for controlling the measuring device 130 in an overall manner. In the measuring devices 130A and 130B, the data detected by the detection unit 132 is stored in the storage device 133. In addition, in the measuring devices 130A and 130B, the marker signal transmitted from the signal receiver 120A and 120B is stored in the storage device 133 together with the measurement data.

[0037] The measuring devices 130A, 130B are capable of communicating with the data processing device 150. Figure 1 In the example of , the measuring device 130A transmits the stored measurement data and the flag signal to the data processing device 150 using wired communication. In addition, in the case of the measuring device 130B, the measurement data and the flag signal are transmitted to the data processing device 150 using wireless communication.

[0038] The cameras 130X and 130Y include an imaging unit (image sensor) 135 and a storage device 136. The cameras 130X and 130Y store image data of the subject's or the observed object's actions acquired by the imaging unit 135 in the storage device 136. The cameras 130X and 130Y acquire, for example, images of the subject's work scene acquired from multiple angles, images of the subject's facial expressions, and images of changes in the subject's pupils.

[0039] The image data stored in the storage device 136 is taken out through a removable external storage medium 140 such as a memory card and read into the data processing device 150. In addition, the transmission of the measurement data from the camera to the data processing device 150 may be performed by wired communication or wireless communication as in the above-mentioned measurement devices 130A and 130B.

[0040] In each measuring device 130, storage devices 133 and 136 are provided inside the device, and the signal transmission method between the detection unit 132 and the imaging unit 135 for acquiring data and these storage devices 133 and 136 is performed by wire. The possibility of data loss in the data transmission performed by wireless method becomes high. Therefore, by setting the data transmission between the data acquisition unit and the storage device as wired method, the data loss of the measurement data and the marking signal can be suppressed.

[0041] The data processing device 150 includes a CPU 151 and a storage device 152. The data processing device 150 acquires measurement data from each measuring device 130 via communication or an external storage medium. The data processing device 150 performs synchronization processing based on a tag signal sent together with each measurement data so that the acquisition period of each measurement data is consistent, and displays the processed measurement data on the display device 160. The user of the data measurement system 10 can use the data displayed on the display device 160 to analyze how the state of the subject changes in response to the event that occurred.

[0042] In addition, Figure 1 In the embodiment, the signal receiver 120 is described as a device independent of the measuring device 130, but the function of the signal receiver 120 may be included in the measuring device 130. In the case where the measuring device 130 is a dedicated device adapted to the system of this embodiment, it is more preferable that the signal receiver and the measuring device are integrated. On the other hand, in the case of a general-purpose measuring device, it can be easily applied to the system by using a separate signal receiver.

[0043] In addition, any of the measuring devices 130 may include the function of the signal transmitter 110. In this case, by performing a measurement start (end) operation in the measuring device including the signal transmitter function, it is possible to respond to this and start (end) measurement and data storage in other measuring devices.

[0044] As a method of synchronizing measurement data acquired by multiple measurement devices in time series, for example, there is a case where the measurement data is synchronized with reference to the time stamp of the timing function of each measurement device so that the time stamp is the same time. In this case, the time of all measurement devices rarely coincides, and the time in each measurement device may have a large time deviation from the actual time.

[0045] In addition, even for the clock frequency of the clock signal used to perform the timing function in each measuring device, many errors may occur in the clock frequency of the oscillator used to generate the clock signal. Therefore, even if it is assumed that there is no offset in the start time between the measuring devices, it is possible that the time shown by the same clock number will be offset for each measuring device. If so, even if the start time of each measuring device is the same, the longer the measurement period, the greater the deviation in the time between the measurement data, and the lower the correlation degree (synchronization accuracy) between the data.

[0046] In the data measurement system 10 of the present embodiment, the following method is adopted: in each measuring device, a marker signal based on a trigger signal simultaneously transmitted from the signal transmitter 110 is stored together with the measurement data, and in the data processing device 150, each measurement data is synchronized based on the marker signal (start signal) at the start of the measurement target period and the marker signal (end signal) at the end. With such a configuration, even if an error exists in the timestamp or clock cycle in each measuring device, the relative time difference between the two marker signals recognized in each measuring device is at least less than one cycle of the control cycle in each measuring device. Therefore, by using the synchronization processing as in the present embodiment, the synchronization accuracy between the data in the measurement target period can be improved.

[0047] [Overview of Synchronous Processing]

[0048] Figure 2 1 is a diagram for explaining the relationship between the measurement data and the marker signal in the measurement device 130. Figure 2 The upper layer shows the measurement value detected by the detection unit 132, and the lower layer shows the marker signal.

[0049] Reference Figure 2 , receiving the start mark signal at time t1, and receiving the end mark signal at time t2 (line LN11). That is, the measurement target period is between time t1 and t2. In the measuring device 130, the measurement data that changes as shown in line LN10 is sampled at a predetermined sampling rate and stored in the storage device 133. At this time, the measurement data and the mark signal are stored in association with the time stamp (time) in the timing function in the device.

[0050] Figure 3 FIG. 1 is a diagram for explaining the relationship between each measurement data and a marker signal in the case of multiple measurement devices. Figure 3 For example, (a) is Figure 1 The data of the measuring device 130A, (b) is Figure 1 The data of the measuring device 130B. Figure 3 In the example, in the time stamp of the measuring device 130A, the start time of the measurement target period is t10, and the end time is t11. On the other hand, in the time stamp of the measuring device 130B, the start time of the measurement target period is t10A (≠ t10), and the end time is t11A (≠ t11). In addition, the length of the measurement target period, that is, the length from time t10 to t11 is the same as the length from time t10A to t11A.

[0051] In this way, when there is a discrepancy between the time stamps of the respective measuring devices, even if the time indicated by the time stamps of the respective measuring devices is made consistent, the measurement value 1( Figure 3The solid line LN20) and the measured value 2 ( Figure 3 In the synchronization process of this embodiment, the start timing determined by the start mark signal and the end timing determined by the end mark signal are made consistent with each other ( Figure 3 As a result, the synchronization accuracy of the measurement data during the measurement target period can be improved.

[0052] in addition, Figure 2 and Figure 3 In the above description, the measurement device 130 is configured to store the marker signal from the signal receiver 120 in a separate channel from the measurement data. However, there are cases where the external signal cannot be input due to the different specifications of the measurement device 130. In this case, Figure 4 As shown in line LN30, by superimposing a marker signal on the measurement data, the start / end timing of the measurement target period may be stored.

[0053] Next, Figure 5 The following describes the synchronization process when the measuring device is the camera 130X. In the case of a camera, generally, it is not possible to Figure 2 Therefore, as described above, a signal receiver 120X having a light-emitting function is arranged within the shooting range of the camera, and synchronization processing is performed based on the light-emitting state of the signal receiver 120X.

[0054] Reference Figure 5 Generally, in a camera, video is recorded as a series of still images taken continuously at a specified frame rate. Figure 5 In FIG. 1 , images from frame 1 to frame (N+1) are shown in time series. In each recorded image, the signal receiver 120X is arranged within the imaging range, and the light emission state of the light emitting unit of the signal receiver 120X can be recognized.

[0055] exist Figure 5 In the example, the signal receiver 120X is in the light-emitting state in frame 2 and frame N. That is, the start trigger signal is received when frame 2 is captured, and the end trigger signal is received when frame N is captured. Therefore, the period from frame 2 to frame N becomes the measurement target period. Then, in the data processing device 150, frame 2 and the start signal of other measurement devices (for example, Figure 3 The frame N is associated with the end signal ( Figure 3 Thus, the image data (frame 2 to frame N) in the measurement target period acquired by the camera 130X can be synchronized with the measurement data of the measurement device 130A.

[0056] In addition, Figure 5 In the example, the trigger signal is identified by the light-emitting state of the light-emitting part in the image, but since the camera can record sound data together with the image data, the trigger signal can also be identified by the sound signal. In this case, a signal receiver that can output a specific sound signal such as a buzzer is used to output the sound signal in response to the reception of the trigger signal. Then, the start and end of the measurement object period in the data processing device 150 are determined using the timing when the sound signal is recorded in the sound data, and synchronization with other measurement data is performed. In this way, the sound signal can also be used for synchronization processing. The synchronization processing performed by using the state of the light-emitting part of the camera and / or the recording of the sound signal in this way also corresponds to the case where the marker signal (state of the light-emitting part, sound signal) is superimposed on the measurement data (image data).

[0057] [Description of trigger signal]

[0058] When the trigger signal from the signal transmitter 110 is transmitted and received by wireless communication, the trigger signal may not be correctly received by the signal receiver 120 depending on the communication state between the signal transmitter 110 and the signal receiver 120 .

[0059] As described above, in the data measurement system of the embodiment, the measurement device 130 may be attached to the subject's body to detect the subject's biological signal. When the signal receiver 120 is arranged inside or near the measurement device 130, the signal receiver 120 is also arranged in contact with the subject's body.

[0060] As wireless communication, Bluetooth (registered trademark) or Wi-Fi (2.4 GHz band, 5 GHz band) radio waves are generally used, but these high-frequency radio waves have the characteristic of being easily absorbed by water. Since about 60% of the human body is water, if, for example, the subject moves so that the subject's body is positioned between the signal transmitter 110 and the signal receiver 120, the radio waves from the signal transmitter 110 may be absorbed while passing through the body, and the trigger signal may not be correctly received by the signal receiver 120.

[0061] like Figure 6 As in the comparative example of FIG. 1 , when a pulse signal is sent from the signal transmitter 110 as a trigger signal, for example, if the trigger signal cannot be received in the signal receiver 120B, the marker signal from the signal receiver 120B is not stored in the measuring device 130B. As a result, the measurement data of the measuring device 130B cannot be synchronized with the measurement data of other measuring devices.

[0062] Therefore, in the data measurement system of the present embodiment, a signal (pulse group) including a plurality of pulse signals continuously transmitted at predetermined intervals is output from the signal transmitter 110 as a trigger signal. Then, in the data processing device 150, the measurement data from the plurality of measurement devices are synchronized in time series based on the start / end synchronization timing determined according to the received pulse signal. By setting such a configuration, even if a part of the pulse signals included in the trigger signal cannot be received, as long as at least one pulse signal is received, synchronization with the measurement data of other measurement devices can be achieved.

[0063] Figure 7 FIG. 2 is a diagram for explaining a trigger signal in the data measurement system of the present embodiment. Figure 7 In the example, the signal transmitter 110 outputs a pulse group including three pulse signals P1 to P3 that are continuously transmitted at a predetermined interval (for example, 100 ms) as a trigger signal. The pulse signals P1 to P3 have different pulse widths. For example, the pulse width of the pulse signal P1 is 50 ms, the pulse width of the pulse signal P2 is 100 ms, and the pulse width of the pulse signal P3 is 200 ms. In addition, the trigger signal only needs to include at least 2 pulse signals, and more than 4 pulse signals may be included in the trigger signal. In addition, the pulse width of each pulse signal and the interval between the pulse signals may also be different from the above example.

[0064] Here, if Figure 7 As shown, consider a case where the signal receiver 120A receives all the pulse signals P1 to P3, but the signal receiver 120B does not receive the pulse signal P2, and the signal receiver 120C does not receive the pulse signals P1 and P3. In this case, there is no pulse signal in the pulse signals P1 to P3 that is commonly received by the signal receivers 120A to 120C. Therefore, in a method of aligning the timing of the received pulse signals, it is impossible to synchronize the measurement data.

[0065] Figure 8 1 is a diagram for explaining the relationship between the trigger signal and the synchronization timing in this embodiment. In this embodiment, in the data processing device 150, the time after a predetermined time from each pulse signal of the trigger signal is set as the synchronization timing for starting or ending the measurement data. Specifically, when the pulse signal P1 is received, the data processing device 150 starts from the falling edge ( Figure 8 The timing ( Figure 8 When receiving the pulse signal P2, the data processing device 150 will start from the falling edge ( Figure 8At the time when a predetermined time T2 has passed since the time t31 ( Figure 8 In addition, when receiving the pulse signal P3, the data processing device 150 will start from the falling edge ( Figure 8 The timing ( Figure 8 The time t33 of the received pulse signal is set as the synchronization timing. In addition, which pulse signal among the pulse signals P1 to P3 is received can be determined based on the pulse widths W1 to W3 of the received pulse signals.

[0066] In addition, when the pulse widths W1 to W3 of each pulse signal and the interval ΔT between adjacent pulse signals are predetermined, the predetermined times T1 to T3 are determined in such a way that the synchronization timing is consistent regardless of which pulse signal of each pulse signal P1 to P3 is received. More specifically, if the predetermined time T3 of the self-pulse signal P3 is determined, the predetermined time T2 of the self-pulse signal P2 can be determined as in formula (1).

[0067] T2=T3+W3+ΔT…(1)

[0068] In addition, the predetermined time T1 of the self-pulse signal P1 can be determined as in the formula (2).

[0069] T1=T2+W2+ΔT=T3+W2+W3+2ΔT…(2)

[0070] The trigger signal received in the signal receivers 120A-120C is Figure 7 In the case of the state shown, the data processing device 150 is as follows Figure 8 As shown, the synchronization timing is determined from the received signal of the signal receiver 120A based on the pulse signals P1 to P3. In addition, the data processing device 150 determines the synchronization timing from the received signal of the signal receiver 120B based on the pulse signals P1 and P3. Furthermore, the data processing device 150 determines the synchronization timing from the received signal of the signal receiver 120C based on the pulse signal P2.

[0071] In this way, by using a plurality of pulse signals having different pulse widths as trigger signals, in each signal receiver 120, as long as at least one pulse signal among the trigger signals can be received, the measurement data of the measurement device associated with the signal receiver can be synchronized with the measurement data of the measurement device associated with other signal receivers. Therefore, the time series of the acquired measurement data can be synchronized more reliably.

[0072] For example, assuming that the reception failure rate for each pulse is 5%, if Figure 7As shown, by using three pulse signals and applying the method of this embodiment, the reception failure rate can be reduced to 0.0125%.

[0073] In the above description, the case where the timing for making the measurement data presented to the user consistent is determined in the signal processing in the data processing device 150 is described, but the synchronization timing as described above can also be used as the measurement start / end timing in each measurement device. In this case, since the measurement data sent from each measurement device to the data processing device 150 is data with the start time and the end time synchronized, it is not necessary to determine the synchronization timing in the data processing device 150, and the acquired measurement data can be displayed as it is.

[0074] In addition, in the above-mentioned example, the pulse signal is distinguished by changing the pulse width of the pulse signal included in the pulse group of the trigger signal, but it can also be configured to change the amplitude of the pulse or the duty cycle of the pulse instead of the pulse width. In addition, when the high-order harmonics are superimposed on the trigger signal, the frequency of the superimposed signal can also be changed. Alternatively, radio waves of multiple frequencies can also be used as the trigger signal.

[0075] [Control of data measurement system]

[0076] Fig. 9 This is a flowchart for explaining the processing of each device in the data measurement system according to the present embodiment.

[0077] Reference Fig. 9 In step (hereinafter referred to as step S) 10, the signal transmitter 110 broadcasts a trigger signal (start trigger signal: first pulse group) indicating the start timing of the measurement object period at a timing based on the user's operation or at a predetermined timing pre-registered in the signal transmitter 110.

[0078] The signal transmitter 110 broadcasts a trigger signal (end trigger signal: second pulse group) indicating the end timing of the measurement target period at a timing based on a user operation or at a timing when a predetermined period has passed from the start signal ( S12 ).

[0079] In the measurement device 130, in S20, the measurement process is started by the operation from the user, and the measurement data is started to be stored in the storage device 133. In addition, the measurement process in the measurement device 130 is preferably started before receiving the marker signal from the signal receiver 120, but it can also be started in response to the reception of the marker signal in S22 or the measurement start timing determined according to the marker signal.

[0080] In S22, the measuring device 130 determines whether the marker signal (start signal) transmitted from the signal receiver 120 is received in response to the trigger signal (first pulse group) from the signal transmitter 110. If the marker signal (start signal) is not received ("No" in S22), the measuring device 130 returns the process to S22 and waits for the reception of the marker signal while continuing the measurement process.

[0081] When a marker signal (start signal) is received ("Yes" in S22), the process proceeds to S24, and the measuring device 130 associates the received marker signal with the measurement data and stores it in the storage device 133. Then, in S26, the measuring device 130 determines whether a marker signal (end signal) indicating the end of the measurement is received from the signal receiver 120 in response to the trigger signal (second pulse group) from the signal transmitter 110. When the marker signal (end signal) is not received from the signal receiver 120 ("No" in S26), the process returns to S24, and the measuring device 130 continues to store the measurement data at a specified sampling rate.

[0082] On the other hand, when a marker signal (end signal) is received from the signal receiver 120 ("Yes" in S26), the process proceeds to S28, and the measurement device 130 outputs the measurement data of the measurement target period from the start signal to the end signal and the data of the marker signal to the data processing device 150. Thereafter, the measurement device 130 stops the measurement process by a user operation or the like (S30).

[0083] In addition, when the data stored in the measuring device 130 is read into the data processing device 150 using an external storage device, the step S28 is omitted. In addition, when the measuring device is a camera 130X or 130Y, since the marker signal is recorded as a light signal in the image data, there is a case where the reception determination of the marker signal as in S22 and S26 cannot be performed. In such a case, the image data during the measurement period is read into the data processing device 150 as a whole, and the synchronization processing is performed in the data processing device 150 by the user's operation or automatically.

[0084] Furthermore, when the measurement process is performed for a long time, the influence of the difference in sampling rate between the measurement devices 130 increases with the measurement time. In such a case, it is preferable to reduce the influence of the difference in sampling rate by dividing the data within the entire measurement period into shorter periods and sending them to the data processing device 150. In this case, in the measurement device 130, Fig. 9In S28, in parallel with sending the measurement data to the data processing device 150, the storage of the measurement data and the marking signal in S24 is continued, and each time a marking signal is sent from the signal receiver 120, the measurement data and the marking signal data stored after the last reception of the marking signal are sent to the data processing device 150.

[0085] In this way, by dividing the measurement data and sending them to the data processing device 150 for processing, the measurement data synchronization processing of each measurement device 130 is performed in units of blocks of the transmitted measurement data, so that the synchronization accuracy of the data can be maintained even in the case of long-term measurement.

[0086] Next, the processing of the data processing device 150 will be described. In S40, the data processing device 150 obtains the measurement data and image data from each measurement device 130. In S42, the data processing device 150 performs the following steps: Figure 8 As described above, the synchronization timing indicating the start and end of measurement is detected based on the pulse signal included in the marker signal included in each acquired data.

[0087] The data processing device 150 calculates the measurement period between adjacent marker signals based on the detected synchronization timing in S44. Then, the data processing device 150 determines in S46 whether the lengths of the measurement periods calculated for the measurement data of each measurement device 130 are consistent.

[0088] When the lengths of the measurement periods of the respective measuring devices 130 are consistent ("Yes" in S46), the process proceeds to S50, and the data processing device 150 makes the start timing and the end timing of the measurement data of the respective measuring devices 130 consistent with each other, and displays the measurement data on the display device 160. Using this display, the user analyzes the movements of the subject.

[0089] On the other hand, if there is a measuring device with inconsistent measurement period lengths (No in S46), the process proceeds to S48, and the data processing device 150 performs correction processing of the sampling time of the measurement data to make the measurement period lengths consistent. Thereafter, the process proceeds to S50, and the measurement data are displayed on the display device 160 in a synchronized state.

[0090] By controlling each device according to the above process, measured data can be appropriately synchronized and presented in a data measurement system using multiple measurement devices. This can improve the synchronization accuracy between multiple measurement data and improve the analysis accuracy of their cause-effect relationship.

[0091] [Modifications]

[0092] In the above embodiment, an example is described in which the signal receiver 120 normally receives at least one of the pulse signal groups transmitted from the signal transmitter 110. On the other hand, in the above embodiment, if one of the signal receivers 120 cannot normally receive all the pulse signals, the normal operation of the data measurement system cannot be guaranteed.

[0093] Therefore, in the modified example described below, a configuration will be described in which, when there is a signal receiver 120 that has not received all the pulse signals, a trigger signal (pulse signal group) is transmitted again.

[0094] (Variant 1)

[0095] Fig.10 is a diagram showing a data measurement system according to Modification 1. In Modification 1, signal transmitter 110 further includes control unit 170 .

[0096] In the first variant, the signal receivers 120A to 120C respectively determine whether they have received at least one of the pulse signals P1 to P3. When the signal receivers 120A to 120C respectively receive at least one of the pulse signals P1 to P3, they send a feedback signal ( Fig.10 F).

[0097] After transmitting the pulse signals P1 to P3, the control unit 170 determines whether a feedback signal is received from each of the signal receivers 120A to 120C within a predetermined time. In addition, if the control unit 170 does not receive a feedback signal from at least one of the signal receivers 120A to 120C, the signal transmitter 110 transmits the pulse signals P1 to P3 again.

[0098] exist Fig.10 In the example, the signal receivers 120A and 120B determine that at least one of the pulse signals P1 to P3 is received, and send a feedback signal to the signal transmitter 110. On the other hand, since the signal receiver 120C does not receive any of the pulse signals P1 to P3, it does not send a feedback signal to the signal transmitter 110.

[0099] The control unit 170 of the signal transmitter 110 detects that the feedback signal from the signal receiver 120C is not received within a predetermined time after the trigger signal is transmitted. In this case, the control unit 170 instructs the signal transmitter 110 to transmit the trigger signal again.

[0100] The feedback signal can be Fig.10 The transmission is shown as wireless, but it can also be sent via a wire (not shown).

[0101] In addition, the control unit 170 may be an independent control device provided outside the signal transmitter 110. In this case, the control unit 170 communicates with the signal transmitter 110 wirelessly or by wire.

[0102] With such a configuration, it is possible to detect a state in which the pulse signals P1 to P3 are not received by any of the signal receivers 120 despite the trigger signal being transmitted from the signal transmitter 110. Furthermore, when the non-reception of the pulse signals by the signal receiver 120 is detected, the trigger signal can be transmitted again from the signal transmitter 110. Therefore, the trigger signal can be reliably transmitted to each signal receiver 120. That is, data can be appropriately synchronized in the data processing device 150.

[0103] (Variant 2)

[0104] The detection of the presence of the signal receiver 120C that has not received all the pulse signals and the retransmission of the trigger signal shown in Modification 1 may be performed manually by the user.

[0105] Fig.11 1 is a diagram showing a data measurement system of Modification 2. In Modification 2, the signal transmitter 110 includes a display unit 171 in addition to the control unit 170 described in Modification 1. In addition, each signal receiver 120 further includes a display unit 121. Fig.11 In the figure, the display unit 121 is omitted in the signal receivers 120B and 120C.

[0106] In the second modification, for example, when at least one pulse signal is received by each signal receiver 120, information indicating that the reception is completed is displayed on the display unit 121 of the signal receiver 120. The user recognizes that there is a signal receiver 120 that has not sent a feedback signal by visually recognizing the display unit 121, and inputs an instruction to send the trigger signal again by operating the operation unit (not shown) of the signal transmitter 110. When the control unit 170 detects the input from the user, the trigger signal is sent again from the signal transmitter 110.

[0107] The display unit 121 may be a display device independently provided outside each signal receiver 120. In this case, the display unit 121 communicates with each signal receiver 120 wirelessly or by wire.

[0108] The display unit 121 may be a display device commonly provided for a plurality of signal receivers 120, in which case it is configured to display information indicating that reception is completed in the plurality of signal receivers 120. Thus, the user can check the reception status of the plurality of signal receivers 120 by checking only one display unit 121.

[0109] In the second modification, similar to the first modification, each signal receiver 120 may transmit a feedback signal to the signal transmitter 110 when each signal receiver 120 receives at least one pulse signal. In this case, the reception status of the feedback signal in the signal transmitter 110 is displayed on the display unit 171. By visually recognizing the display unit 171, the user can recognize that there is a signal receiver 120 that does not transmit a feedback signal. Then, the user inputs an instruction to transmit the trigger signal again by operating the operation unit (not shown) of the signal transmitter 110. When the control unit 170 detects the input from the user, the trigger signal is transmitted again from the signal transmitter 110.

[0110] With such a configuration, the user can visually recognize the feedback signal and input an instruction for the trigger signal through the signal transmitter 110 , thereby improving convenience.

[0111] In addition, the control unit 170 and the display unit 171 may be display devices independently provided outside the signal transmitter 110. In this case, the control unit 170 and the display unit 171 communicate with the signal transmitter 110 wirelessly or by wire.

[0112] (Variant 3)

[0113] The detection of the presence of the signal receiver 120C that has not received any pulse signals shown in Modification 1 may also be performed by the control unit 170 .

[0114] In the third modification, the signal receivers 120A to 120C always send feedback signals ( Fig.10 F). The feedback signal includes the measurement data of the measurement devices 130A to 130C and the received pulse signals P1 to P3. In the third variation, each receiver 120A to 120C does not need to determine the reception of the pulse signals P1 to P3.

[0115] The control unit 170 monitors the feedback signals from the signal receivers 120A to 120C and determines whether the feedback signals include the pulse signals P1 to P3. If the control unit 170 determines that the feedback signals do not include the pulse signals P1 to P3, it instructs the signal transmitter 110 to retransmit the trigger signal.

[0116] In Modifications 1 to 3, the interval and / or width of the pulse signal in the trigger signal transmitted again may be the same as or different from that of the previous trigger signal.

[0117] In addition, when a trigger signal is received, whether or not to set the feedback signal to be sent to the signal transmitter 110 may be different in each signal receiver 120. Fig.10 The control of automatically executing the re-sending of the trigger signal, or Fig.11 The control of manually executing the retransmission of the trigger signal may be different in each signal receiver 120 .

[0118] In the signal receivers 120A and 120B, the trigger signal received earlier is updated to the trigger signal received later. For example, for the trigger signal indicating the start of synchronization, the last trigger signal received at the time when the trigger signal indicating the start of synchronization is considered to be received is set as the trigger signal indicating the start of synchronization. The time when the trigger signal indicating the start of synchronization is considered to be received is determined, for example, in the data processing device 150. The time when the trigger signal indicating the start of synchronization is considered to be received is, for example, the time corresponding to the first half of all the measurement data.

[0119] In addition, for the trigger signal indicating the end of synchronization, similarly, the last trigger signal received at the time when the trigger signal indicating the end of synchronization is considered to be received is set as the trigger signal indicating the end of synchronization. The time when the trigger signal indicating the end of synchronization is considered to be received is determined, for example, in the data processing device 150. The time when the trigger signal indicating the end of synchronization is considered to be received is, for example, the time corresponding to the second half of all the measurement data. The update of the trigger signal may update the data itself on the memory, or may be set to adopt the latest trigger signal in the software.

[0120] By setting the configuration of the above-mentioned modification example, it is possible to determine whether each signal receiver 120 has received the trigger signal. In addition, if there is a signal receiver 120 that has not received the trigger signal, the signal transmitter 110 can send the trigger signal again. Therefore, the trigger signal can be reliably transmitted to each signal receiver 120. Therefore, synchronization of multiple measurement data can be performed more reliably.

[0121] In addition, in the modified example, the case where all pulse signals are not received by the signal receiver is studied, and an example is described in which the trigger signal includes multiple pulse signals, but it is not limited to this. Even if the trigger signal consists of one pulse signal, the same effect can be achieved.

[0122] In addition, in the above description, the start timing and the end timing are described as the timing after a specified time has passed since the generation of the pulse signal included in the trigger signal, but the start timing and the end timing may also be the timing of the specified time back from the generation of the pulse signal. That is, the start timing and the end timing are set to the timing separated by a specified time from the generation of each pulse signal of the trigger signal.

[0123] [plan]

[0124] (Item 1) A data measurement system of one scheme comprises a plurality of measurement devices, a data processing device for processing data respectively obtained from the plurality of measurement devices, and a transmitter for transmitting a trigger signal related to data processing to the plurality of measurement devices by wireless. The trigger signal includes a first pulse group corresponding to the start timing of data processing and a second pulse group corresponding to the end timing of data processing. The data processing device obtains data measured between the start timing and the end timing, and processes the measurement data of the plurality of measurement devices so that the start timings and the end timings in the obtained data coincide in time. The first pulse group and the second pulse group respectively include a first pulse and a second pulse which are continuously transmitted at a predetermined interval. The first pulse and the second pulse have different pulse widths. The start timing is a timing separated by a first predetermined time from the generation of the first pulse in the first pulse group, or a timing separated by a second predetermined time from the generation of the second pulse. The end timing is a timing separated by a first predetermined time from the generation of the first pulse in the second pulse group, or a timing separated by a second predetermined time from the generation of the second pulse.

[0125] According to the data measurement system described in item 1, the trigger signal (first pulse group, second pulse group) sent from the transmitter to each measuring device includes two pulse signals with different pulse widths. In each measuring device, as long as at least one of the two pulse signals can be received in the trigger signal (first pulse group) sent at the start time and the trigger signal (second pulse group) sent at the end time, the start timing and end timing for synchronization can be determined in the data processing device. As a result, poor synchronization caused by poor reception of the trigger signal in the measuring device can be reduced, and the time series of the measured data can be synchronized more reliably.

[0126] (Item 2) In the data measurement system described in Item 1, the first prescribed time and the second prescribed time are set so that the timing of the first prescribed time from the generation of the first pulse coincides with the timing of the second prescribed time from the generation of the second pulse.

[0127] According to the data measurement system described in item 2, the first predetermined time and the second predetermined time are appropriately set so that the start timing and the end timing based on each pulse signal are consistent. Thus, even if a certain measuring device cannot receive one of the first pulse and the second pulse, the measurement data of the measuring device can be synchronized with the measurement data of other measuring devices.

[0128] (Item 3) In the data measurement system described in Item 1 or Item 2, the first pulse group and the second pulse group further include a third pulse having a pulse width different from that of the first pulse and the second pulse. The start timing is a timing of a first predetermined time from the generation of the first pulse in the first pulse group, a timing of a second predetermined time from the generation of the second pulse, or a timing of a third predetermined time from the generation of the third pulse. The end timing is a timing of a first predetermined time from the generation of the first pulse in the second pulse group, a timing of a second predetermined time from the generation of the second pulse, or a timing of a third predetermined time from the generation of the third pulse. The first predetermined time, the second predetermined time, and the third predetermined time are set so that the timing of the first predetermined time from the generation of the first pulse, the timing of the second predetermined time from the generation of the second pulse, and the timing of the third predetermined time from the generation of the third pulse coincide.

[0129] According to the data measurement system described in item 3, the trigger signal (first pulse group, second pulse group) sent from the transmitter to each measuring device includes three pulse signals with different pulse widths. In each measuring device, as long as at least one of the three pulse signals can be received in the trigger signal sent at the start time and the end time, the start timing and the end timing for synchronization can be determined in the data processing device. As a result, poor synchronization caused by poor reception of the trigger signal in the measuring device can be further reduced, so that the synchronous processing of multiple measurement data can be performed more reliably.

[0130] (Item 4) In the data measurement system described in any one of Items 1 to 3, the transmitter is included in any one of the plurality of measurement devices.

[0131] According to the data measurement system described in item 4, one of the plurality of measurement devices includes the function of the transmitter. Therefore, the system can be constructed without separately preparing a transmitter.

[0132] (Item 5) In the data measurement system described in any one of Items 1 to 4, the plurality of measurement devices each include any one of an environmental sensor for measuring environmental information, a biological sensor for measuring biological information, and an image sensor for capturing an image.

[0133] According to the data measurement system described in Item 5, an environmental sensor, a biological sensor, and an image sensor (camera) can be used as the measurement device.

[0134] (Item 6) In the data measurement system described in Item 5, the plurality of measurement devices each include a storage device for storing measurement data measured by the measurement device, and a signal transmission method from the sensor to the storage device is performed by wire.

[0135] According to the data measurement system described in Item 6, in each measuring device, wireless is not used in the signal transmission method from the sensor to the storage device. In the case of wireless communication, there is a risk of a large amount of data loss, but by using wired communication to store the measurement data in the storage device, data loss can be reduced.

[0136] (Item 7) The data measurement system according to any one of Items 1 to 6 further includes a display device for presenting the measurement data to the user.

[0137] According to the data measurement system described in Item 7, the user can associate and confirm the measurement data from the plurality of measurement devices through the display device.

[0138] (Item 8) In the data measurement system described in any one of Items 1 to 7, it is determined whether at least one of the multiple measuring devices has received both the first pulse and the second pulse included in the first pulse group included in the trigger signal, and the transmitter re-sends the trigger signal to the multiple measuring devices based on the result of the determination.

[0139] According to the data measurement system described in item 8, even if one of the signal receivers fails to normally receive both the first pulse and the second pulse, an additional trigger signal can be transmitted, so that the data measurement system can operate normally.

[0140] (Item 9) In the data measurement system described in any one of Items 1 to 7, it is determined whether at least one of the multiple measuring devices has received both the first pulse and the second pulse included in the second pulse group included in the trigger signal, and the transmitter re-sends the trigger signal to the multiple measuring devices based on the result of the determination.

[0141] According to the data measurement system described in item 9, even if one of the signal receivers fails to normally receive both the first pulse and the second pulse, an additional trigger signal can be transmitted, so that the data measurement system can operate normally.

[0142] (Item 10) A method of another scheme relates to a method for performing data processing of measurement data in a data measurement system including a plurality of measurement devices. The data measurement system includes a transmitter for sending a trigger signal related to data processing and a data processing device. The trigger signal includes a first pulse group corresponding to the start timing of data processing and a second pulse group corresponding to the end timing of data processing. The method includes: i) a step of using a transmitter to send a trigger signal to a plurality of measurement devices by wireless; ii) a step of acquiring data measured between the start timing and the end timing in the data processing device; iii) a step of processing the measurement data of a plurality of measurement devices in the data processing device so that the start timings and the end timings in the acquired data are time-matched. The first pulse group and the second pulse group respectively include a first pulse and a second pulse that are continuously sent at a predetermined interval. The first pulse and the second pulse have different pulse widths. The start timing is a timing separated by a first predetermined time from the start of the first pulse in the first pulse group, or a timing separated by a second predetermined time from the start of the second pulse. The end timing is a timing when a first predetermined time has elapsed from the start of the first pulse in the second pulse group, or a timing when a second predetermined time has elapsed from the start of the second pulse.

[0143] According to the method described in item 10, the trigger signal (first pulse group, second pulse group) sent from the transmitter to each measuring device includes two pulse signals with different pulse widths. In each measuring device, as long as at least one of the two pulse signals can be received in the trigger signal (first pulse group) sent at the start time and the trigger signal (second pulse group) sent at the end time, the start timing and end timing for synchronization can be determined in the data processing device. As a result, poor synchronization caused by poor reception of the trigger signal in the measuring device can be reduced, and the time series of the measured data can be synchronized more reliably.

[0144] (Item 11) The method described in Item 10 includes: after the sending step, the step of determining whether at least one of the first pulse and the second pulse included in the first pulse group included in the trigger signal is received; and the step of sending the trigger signal again to multiple measuring devices based on the determination result through the transmitter.

[0145] According to the method described in Item 11, even if one of the signal receivers fails to normally receive both the first pulse and the second pulse, an additional trigger signal can be transmitted, so that the data measurement system can operate normally.

[0146] (Item 12) The method described in Item 10 includes: after the sending step, the step of determining whether at least one of the first pulse and the second pulse included in the second pulse group included in the trigger signal is received; and the step of sending the trigger signal again to multiple measuring devices based on the determination result through the transmitter.

[0147] According to the method described in Item 12, even if one of the signal receivers fails to normally receive both the first pulse and the second pulse, an additional trigger signal can be transmitted, so that the data measurement system can operate normally.

[0148] (Item 13) A data measurement system of another scheme comprises a plurality of measurement devices, a data processing device that performs data processing of data respectively obtained from the plurality of measurement devices, and a transmitter that sends a trigger signal related to data processing to the plurality of measurement devices via wireless. The data processing device obtains data measured between a start timing and an end timing, makes the start timings and the end timings in the obtained data coincide in time, and processes the measurement data of the plurality of measurement devices. The trigger signal corresponds to at least one of the start timing and the end timing of the data processing. The data measurement system determines whether at least one of the plurality of measurement devices has received the trigger signal. The transmitter resends the trigger signal to the plurality of measurement devices based on the result of the determination.

[0149] (Item 14) A method of another scheme relates to a method for performing data processing of measurement data in a data measurement system including a plurality of measurement devices. The data measurement system comprises a transmitter for sending a trigger signal related to data processing and a data processing device. The method comprises: a step of using the transmitter to send a trigger signal to a plurality of measurement devices via wireless; a step of acquiring data measured between a start timing and an end timing in the data processing device; a step of processing the measurement data of a plurality of measurement devices in the data processing device so that the start timings and the end timings in the acquired data are temporally consistent with each other; a step of determining whether the trigger signal is received after the sending step; and a step of sending the trigger signal again to the plurality of measurement devices according to the determination result by the transmitter.

[0150] According to the system and method described in Item 13 and Item 14, even if the trigger signal is not received normally, an additional trigger signal can be sent, so that the data measurement system can operate normally.

[0151] The embodiments disclosed this time should be considered as illustrative in all aspects and not restrictive. The scope of the present invention is indicated not by the description of the above embodiments but by the claims, which means that all changes within the meaning and scope equivalent to the claims are also included.

[0152] Description of Reference Numerals

[0153] 10Data Measurement System

[0154] 110 signal transmitter

[0155] 120, 120A~120C, 120X signal receiver

[0156] 130, 130A, 130B measuring devices

[0157] 130X, 130Y cameras

[0158] 131, 151CPU

[0159] 132 Detection Department

[0160] 133, 136, 152 Storage devices

[0161] 135 Photography Department

[0162] 140 External storage media

[0163] 150 Data processing device

[0164] 160 Display Device

[0165] 170 Control Department

[0166] 121, 171 display unit.

Claims

1. A data measurement system, characterized in that: have: Multiple measuring devices; a data processing device that performs data processing of the data respectively acquired from the plurality of measuring devices; a transmitter that wirelessly transmits a trigger signal related to the data processing to the plurality of measuring devices, The trigger signal includes a first pulse group corresponding to a start timing of the data processing and a second pulse group corresponding to an end timing of the data processing. The data processing device acquires data measured between the start timing and the end timing, and processes the measurement data of the plurality of measurement devices so that the start timings and the end timings in the acquired data coincide in time. The first pulse group and the second pulse group respectively include a first pulse and a second pulse that are transmitted continuously at a predetermined interval. The first pulse and the second pulse have different pulse widths. The start timing is a timing at which a first predetermined time has elapsed from the generation of the first pulse in the first pulse group, or a timing at which a second predetermined time has elapsed from the generation of the second pulse. The end timing is a timing at which the first predetermined time is separated from the generation of the first pulse in the second pulse group, or a timing at which the second predetermined time is separated from the generation of the second pulse. The first predetermined time and the second predetermined time are set so that a timing at which the first predetermined time is separated from the generation of the first pulse coincides with a timing at which the second predetermined time is separated from the generation of the second pulse.

2. The data measurement system according to claim 1, characterized in that: The first pulse group and the second pulse group each further include a third pulse having a pulse width different from that of the first pulse and the second pulse, The start timing is a timing separated from the generation of the first pulse in the first pulse group by the first predetermined time, a timing separated from the generation of the second pulse by the second predetermined time, or a timing separated from the generation of the third pulse by the third predetermined time. The end timing is a timing at which the first predetermined time is separated from the generation of the first pulse in the second pulse group, a timing at which the second predetermined time is separated from the generation of the second pulse, or a timing at which the third predetermined time is separated from the generation of the third pulse. The first prescribed time, the second prescribed time and the third prescribed time are set so that the timing of the first prescribed time from the generation of the first pulse, the timing of the second prescribed time from the generation of the second pulse and the timing of the third prescribed time from the generation of the third pulse are consistent.

3. The data measurement system according to claim 1, characterized in that: The transmitter is included in any one of the plurality of measuring devices.

4. The data measurement system according to claim 1, characterized in that: Each of the plurality of measuring devices includes any one of an environmental sensor for measuring environmental information, a biological sensor for measuring biological information, and an image sensor for capturing an image.

5. The data measurement system according to claim 4, characterized in that: The plurality of measuring devices respectively include storage devices for storing measurement data measured by the measuring devices, and a signal transmission method from the sensor to the storage devices is performed using wires.

6. The data measurement system according to claim 1, characterized in that: The device further includes a display device for presenting the measurement data to a user.

7. The data measurement system according to claim 1, characterized in that: It is determined whether at least one of the plurality of measuring devices has received both the first pulse and the second pulse included in the first pulse group included in the trigger signal, and the transmitter re-transmits the trigger signal to the plurality of measuring devices based on the determination result.

8. The data measurement system according to claim 1, characterized in that: It is determined whether at least one of the plurality of measuring devices has received both the first pulse and the second pulse included in the second pulse group included in the trigger signal, and the transmitter re-sends the trigger signal to the plurality of measuring devices based on the determination result.

9. A method for performing data processing of measurement data in a data measurement system including a plurality of measurement devices, characterized in that: The data measurement system comprises a transmitter for transmitting a trigger signal related to the data processing, and a data processing device. The trigger signal includes a first pulse group corresponding to a start timing of the data processing and a second pulse group corresponding to an end timing of the data processing. The method comprises: The step of using the transmitter to send the trigger signal to the plurality of measuring devices wirelessly; In the data processing device, a step of acquiring data measured between the start timing and the end timing; The data processing device processes the measurement data of the plurality of measurement devices so that the start timings and the end timings in the acquired data are time-matched. The first pulse group and the second pulse group respectively include a first pulse and a second pulse that are transmitted continuously at a predetermined interval. The first pulse and the second pulse have different pulse widths. The start timing is a timing at which a first predetermined time has elapsed from the generation of the first pulse in the first pulse group, or a timing at which a second predetermined time has elapsed from the generation of the second pulse. The end timing is a timing at which the first predetermined time is separated from the generation of the first pulse in the second pulse group, or a timing at which the second predetermined time is separated from the generation of the second pulse. The first predetermined time and the second predetermined time are set so that a timing at which the first predetermined time is separated from the generation of the first pulse coincides with a timing at which the second predetermined time is separated from the generation of the second pulse.

10. The method according to claim 9, characterized in that include: After the sending step, a step of determining whether at least one of the first pulse and the second pulse included in the first pulse group included in the trigger signal is received; The step of resending the trigger signal to the plurality of measurement devices based on the result of the determination by the transmitter.

11. The method according to claim 9, characterized in that include: After the sending step, a step of determining whether at least one of the first pulse and the second pulse included in the second pulse group included in the trigger signal is received; The step of resending the trigger signal to the plurality of measurement devices based on the result of the determination by the transmitter.

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