JP2011076607A - Measurement data synchronization system and measurement data synchronization method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a measurement data synchronization system and a method thereof for synchronizing measurement data without requiring any special hardware or structure. <P>SOLUTION: The measurement data synchronization system for synchronizing measurement data from a plurality of measurement instruments includes: signal lines; a plurality of measurement instruments each outputting a set of data including measurement data, measurement time, and a measurement instrument ID to the signal line; and a data processing apparatus obtaining the set of data from the signal line, and after acquiring a measurement time calibration value corresponding to the measurement instrument ID stored in advance based on the measurement instrument ID in the set of data, calibrating the measurement time in the set of data with the measurement time calibration value. No synchronization signal is required to each of the measurement instruments, so that there needs no special hardware therefor. There is no need for the measurement apparatus to record a reference time or to transmit it to the data processing apparatus, so that no special structure therefor is needed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a measurement data synchronization system and a measurement data synchronization method in which a plurality of measurement devices such as measuring instruments and sensors (hereinafter referred to as units) and a data processing device such as a computer are connected. The present invention relates to a measurement data synchronization system and a measurement data synchronization method that can ensure the synchronization of measurement data between measurement devices without being limited by the number.

  When measuring various physical quantities of the measurement target, such as temperature and voltage, using multiple units, or when measuring the physical quantity of the measurement target at multiple locations, synchronize the measurement results between multiple units. It is necessary to secure. The measurement data synchronization system can ensure synchronization of measurement data measured by each of a plurality of units. There are two main types of data synchronization: from the hardware side and from the software side.

  In conventional hardware technology, when data is synchronized between multiple units, a synchronization signal for ensuring data synchronization is supplied to each unit, and data is collected by collecting data according to the synchronization signal. Was secured. In this method, since a synchronization signal needs to be supplied to each unit, a special device is required for hardware. However, adding special hardware devices not only increases costs, but also complicates the entire system and increases the development man-hours. In addition, hardware limitations (the number of units to be connected, the length of the synchronization signal line, etc.) are also generated, and it has been difficult to achieve higher speed and multi-channel.

  In order to solve the above-mentioned problem existing in the method of synchronizing data by hardware, Patent Document 1 below presents a method of synchronizing data by software. In the method, as shown in FIG. 7, the data processing device 300 outputs the reference time to the signal line 100, and the units 401 to 40n that are measuring devices acquire the reference time from the signal line, and at least the reference time And the measurement data obtained by measuring the measurement target are output to the signal line 100, the data processing device 300 acquires the combination data output by the units 401 to 40n from the signal line, and the reference time in the combination data To synchronize data between units.

JP2003-242583

  In the data synchronization method of Patent Document 1 described above, a special hardware device for supplying a synchronization signal to each unit was not necessary, but the unit recorded the reference time of the data processing device and again returned to the data processing device. Since it had to be sent back, a mechanism capable of realizing the function was necessary for the unit hardware. In other words, a unit with this mechanism can perform synchronization processing, but other units without this mechanism cannot perform synchronization processing.

  The present invention has been made in view of the problems existing in Patent Document 1, and a measurement data synchronization system and a measurement data synchronization method capable of synchronizing measurement data without a special hardware mechanism and a special mechanism. The purpose is to provide.

  The present invention provides a measurement data synchronization system that performs synchronization processing on measurement data from a plurality of measurement devices, which includes a signal line, measurement data obtained by measuring at least a measurement target, and measurement for performing the measurement. A plurality of measurement devices that output a set data consisting of time and a measurement device ID for marking the measurement device to the signal line, and the set data from the plurality of measurement devices is acquired from the signal line. Based on the measurement device ID in the set data, the measurement time calibration value corresponding to the measurement device ID stored in advance is acquired, and then the measurement time in the set data is calibrated with the measurement time calibration value And a processing device.

  The data processing device of the measurement data synchronization system can perform resampling processing on the measurement data in the set data based on the measurement time after calibration.

  The data processing device of the measurement data synchronization system includes a set data storage unit that stores the set data input from the plurality of measurement devices via a signal line, a measurement device ID, and a measurement time corresponding to the measurement device ID. A calibration value storage unit that stores calibration values in association with each other, acquires the set data from the set data storage unit, and corresponds to the measurement device ID from the calibration value storage unit based on the measurement device ID in the set data And a synchronization calculator that corrects the measurement time in the set data with the measurement time calibration value and performs the resampling process.

  The synchronization calculation unit of the measurement data synchronization system acquires the set data from the set data storage unit, and based on the measurement device ID in the set data, the measurement time corresponding to the measurement device ID from the calibration value storage unit After the calibration value is acquired, the measurement time calibration unit that corrects the measurement time in the set data by the measurement time calibration value, and the time calibration that stores the set data that has been time-corrected by the measurement time calibration unit A data storage unit, and a resampling processing unit that performs resampling processing on the set data stored in the data storage unit after time calibration, and the measurement data synchronization system includes a group that has been subjected to synchronization processing by the synchronization calculation unit. A post-synchronization data storage unit for storing data may be further provided.

  The measurement time calibration unit of the measurement data synchronization system can calibrate the measurement time based on the following equation: measurement time after calibration = measurement time / measurement time calibration value.

  According to the measurement data synchronization system described above, since it is not necessary to provide a synchronization signal to each measurement device, no special hardware device used for this is required. Further, since it is not necessary for the measuring device to record the reference time and send it back to the data processing device, it is not necessary to provide a special mechanism used for this in the hardware of the measuring device.

  Further, according to the measurement data synchronization system, each measurement device is identified by the measurement device ID and the synchronization processing is performed, so that the synchronization processing that matches the user's request can be performed.

  The data processing apparatus of the measurement data synchronization system of the present invention acquires a set data from the set data storage unit periodically at a predetermined update cycle and a real time clock unit that provides a reference time for calibrating the measurement time Then, after obtaining the reference time from the real-time clock unit, the measurement time calibration value is calculated from the measurement time and the reference time in the set data, and the calculated measurement time calibration value and the corresponding measurement device ID And a calibration value calculation unit that stores the correction value in the correction value storage unit in association with each other. The real-time clock unit can acquire the clock time of the data processing device itself as the reference time, and can also acquire the reference time from an external clock.

The calibration value calculator of the measurement data synchronization system can calculate the measurement time calibration value based on the equation: measurement time calibration value = (t _UNIT1 -t _UNIT0 ) / (t _RTC1 -t _RTC0 ).
t _RTC0 is the reference time when starting the update cycle, t _UNIT0 is the measurement time in the set data when starting the update cycle, and t _RTC1 is the reference time when reaching the update cycle T _UNIT1 is the measurement time in the set data when the update period is reached.

The calibration value calculator of the measurement data synchronization system can also calculate the measurement time calibration value based on the equation: measurement time calibration value = (t _UNIT1 -t _UNIT00 ) / (t _RTC1 -t _RTC00 ).
t _RTC00 is the reference time when starting synchronization, t _UNIT00 is the measurement time in the set data when starting synchronization, t _RTC1 is the reference time when reaching the update cycle, and t _UNIT1 is It is a measurement time in the set data when the update period is reached.

  According to the above measurement data synchronization system, since the measurement time calibration process is performed using the measurement time calibration value stored in advance in the calibration value storage unit, the synchronization process can be performed immediately after the start of measurement. In addition, since the measurement time calibration value is updated at a predetermined update cycle, the fluctuation state of the clock of the measuring device within the update cycle is reflected in the measurement time calibration value, and the error of the synchronization result can be reduced.

  The present invention also provides a measurement data synchronization method for performing synchronization processing on measurement data from a plurality of measuring devices, and the plurality of measuring devices measure at least measurement data obtained by measuring an object to be measured, and perform the measurement. A set data consisting of a time and a measurement device ID for marking the measurement device is output to a signal line, and the data processing device acquires the set data from the plurality of measurement devices from the signal line, Based on the measurement device ID in the set data, obtaining a measurement time calibration value corresponding to the measurement device ID stored in advance, and then calibrating the measurement time in the set data with the measurement time calibration value. Features.

  In the measurement data synchronization method, the data processing apparatus can perform resampling processing on the measurement data in the set data based on the measurement time after calibration, and store the resampled set data.

  In the measurement data synchronization method, the measurement time can be calibrated based on the following equation: measurement time after calibration = measurement time / measurement time calibration value.

  The measurement time calibration unit of the measurement data synchronization system can calibrate the measurement time based on the following equation: measurement time after calibration = measurement time / measurement time calibration value.

  According to the measurement data synchronization method described above, it is not necessary to provide a synchronization signal to each measurement device, and therefore no special hardware device used for this is required. Further, since it is not necessary for the measuring device to record the reference time and send it back to the data processing device, it is not necessary to provide a special mechanism used for this in the hardware of the measuring device.

  Further, according to the measurement data synchronization system, each measurement device is identified by the measurement device ID and the synchronization processing is performed, so that the synchronization processing that matches the user's request can be performed.

  In the measurement data synchronization method of the present invention, the data processing device periodically calculates the measurement time calibration value based on the reference time and the measurement time in the set data at a predetermined update period, and calculates the calculated measurement time calibration value. It can be stored in association with the corresponding measuring device ID.

  In the measurement data synchronization method, the reference time can be generated by a clock of the data processing apparatus itself, or can be generated by an external clock.

In the measurement data synchronization method, the measurement time calibration value can be calculated based on the equation: measurement time calibration value = (t _UNIT1 -t _UNIT0 ) / (t _RTC1 -t _RTC0 ).
t _RTC0 is the reference time when starting the update cycle, t _UNIT0 is the measurement time in the set data when starting the update cycle, and t _RTC1 is the reference time when reaching the update cycle T _UNIT1 is the measurement time in the set data when the update period is reached.

In the measurement data synchronization method, the measurement time calibration value can be calculated based on the equation: measurement time calibration value = (t _UNIT1 -t _UNIT00 ) / (t _RTC1 -t _RTC00 ).
t _RTC00 is the reference time when starting synchronization, t _UNIT00 is the measurement time in the set data when starting synchronization, t _RTC1 is the reference time when reaching the update cycle, and t _UNIT1 is It is a measurement time in the set data when the update period is reached.

  According to the measurement data synchronization method described above, since the measurement time calibration process is performed using the measurement time calibration value stored in advance, the synchronization process can be performed immediately after the start of measurement. In addition, since the measurement time calibration value is updated at a predetermined update cycle, the fluctuation state of the clock of the measuring device within the update cycle is reflected in the measurement time calibration value, and the error of the synchronization result can be reduced.

It is a figure which shows the whole structure of this invention. 2 is a diagram showing a specific configuration of a data processing device 30. FIG. 3 is a diagram showing a specific configuration of a synchronization calculation unit 35. FIG. It is a figure which shows the flowchart of a measurement data synchronous process. It is a figure which shows the specific process flow of a time calibration process (S10). It is a figure which shows the flow of a calibration value update process. It is a figure which shows the conventional whole system structure which synchronizes data by software.

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram showing the overall configuration of the present invention. The data processing device 30 is a device having data processing capability, such as a computer, and is connected to the general-purpose signal line 10. The measuring unit 40 is composed of measuring devices (hereinafter referred to as units) 41 to 4n (where n is a natural number) that is a plurality of measuring devices, sensors, and the like, and each unit 41 to 4n is connected to the general-purpose signal line 10. Signals are exchanged with the data processing device 30. The data processing device 30 and each of the units 41 to 4n have a general-purpose communication circuit 10A, and the general-purpose communication circuit 10A inputs and outputs data.

  FIG. 2 is a diagram showing a specific configuration of the data processing device 30. As shown in FIG. The data processing device 30 is a unit ID for identifying the units 41 to 4n, the measurement data of the units 41 to 4n, and the time of the measurement data (hereinafter referred to as measurement time), which are data input by the general-purpose communication circuit 10A. Data of the units 41 to 4n including at least the unit data, that is, the group data storage unit 31 that stores the unit data corresponding to the unit ID, the measurement data, and the measurement time, and the current time of the clock of the data processing device 30 RTC (Real Time Clock) 33 acquired as a reference for time calibration processing, and set data is periodically acquired from the set data storage unit 31 at a predetermined update cycle, and the time of the data processing device 30 is acquired from the RTC. After that, the calibration value calculation unit 32 that calculates the calibration value used for the time calibration processing based on the measurement time and RTC time in the set data, and the calibration value calculation unit 32 Calibration value storage unit 34 that stores the set data including the calibration value and the unit ID in association with each other, and acquires the set data from the set data storage unit 31, and from the calibration value storage unit 34 based on the unit ID in the set data By acquiring the calibration value corresponding to the unit, correcting the measurement time in the set data with the calibration value, and performing resampling processing on the set data for which the measurement time is calibrated, thereby synchronizing the set data. And a post-synchronization data storage unit 36 that stores the set data after the synchronization processing is performed by the synchronization calculation unit 35.

  FIG. 3 is a diagram showing a specific configuration of the synchronization calculation unit 35. As shown in FIG. The synchronization calculation unit 35 is configured to calibrate the measurement time in the set data from the set data storage unit 31 with the calibration value from the calibration value storage unit 34, and after the time is calibrated by the measurement time calibration unit 351. Data calibration unit 352 that stores the set data of the data, and resampling process that outputs to the data storage unit 36 after synchronization after performing the resampling process on the set data stored in the data storage unit 352 after the time calibration Part 353.

  Hereinafter, the processing flow of the present invention will be described in detail.

  FIG. 4 is a flowchart of the measurement data synchronization process according to the present invention. Specifically, when synchronization processing is started, time calibration processing is performed on the set data in step S10, resampling processing is performed on the set data that has been time calibrated in step S20, and resampling processing is performed in step S30. After the data (that is, the set data after the synchronization process) is stored, it is determined in step S40 whether the subsequent set data is to be subjected to the synchronization process. When continuing (“Y”), the process returns to step S10, and when not continuing (“N”), the synchronization processing is terminated. The group data after the synchronization processing is stored in the post-synchronization data storage unit 36 and used for subsequent processing and display. For resampling processing, various calculation methods such as conventional linear interpolation (Nearest-Point), Nearest Point (Integral-Average), Minimum-Maximum Average (Min-Max-Average), etc. The detailed description is omitted here. Hereinafter, a detailed description will be given focusing on the time calibration processing which is the main point of the present invention.

  FIG. 5 is a diagram showing a specific processing flow of the time calibration processing (S10). When the time calibration process is started, in step S101, each of the units 41 to 4n each includes at least measurement data obtained by measuring the measurement target, measurement time at which the measurement is performed, and unit data for marking the unit Is output to the data line 10, and the data processing device 30 acquires the set data from the units 41 to 4n from the data line 10, stores the set data in the set data storage unit 31, and the measurement time calibration unit 351 of the synchronous calculation unit 35. Are sequentially read from the set data storage unit 31 into the set data.

  In step S102, the measurement time calibration unit 351 acquires a calibration value for time calibration from the calibration value storage unit. Specifically, the measurement time calibration unit 351 searches for a calibration value corresponding to the unit ID stored in the calibration value storage unit 34 based on the unit ID in the read set data. When synchronization processing is performed for the unit corresponding to the unit ID for the first time, the calibration value storage unit 34 has no calibration value corresponding to the unit ID. At this time, the calibration value is set as 1. That is, at first, it is recognized that there is no error in the measurement time of the unit, and calibration is not necessary.

After acquiring the set data and the corresponding calibration value, the measurement time in the set data is calibrated by the measurement time calibration unit 351 in step S103. Specifically, it is calculated by the following formula (1).
Measurement time after calibration = Measurement time / Calibration value (1)
This gives the measurement time after calibration.

  In step S104, the set data whose measurement time is calibrated is stored in the data 352 after time calibration. Thereafter, the time calibration process is terminated.

  In step S102, a calibration value for time calibration processing stored in the calibration value storage unit 34 is acquired. The calibration value calculation unit 32 periodically updates the calibration value at a predetermined update cycle. Hereinafter, the calibration value update process will be described in detail.

FIG. 6 is a diagram showing a flow of calibration value update processing. Simultaneously with the start of the synchronization process, the calibration value update process is started. First, in step S510, the calibration value calculation unit 32 acquires the time t _RTC0 from the _{RTC 33} and the measurement time t _UNIT0 in the set data from the set data storage unit 31. Then, in step S520, it is determined whether or not a predetermined update period is reached. The update cycle can be set in advance by the user, and can be set, for example, as 6 hours (that is, the calibration value update process is performed every 6 hours from the start of the synchronization process).

If it is determined in step S520 that the predetermined update cycle has not been reached ("N"), the determination in step S520 is repeated. If it is determined in step S520 that the predetermined update period is reached (“Y”), the process proceeds to step S530. In step S530, the current RTC time t _RTC1 and the measurement time t _UNIT1 in the set data are acquired again. Then, in step S540, a calibration value is calculated by the following equation (2) from the acquired time information t _RTC0 , t _UNIT0 , t _RTC1 , t _UNIT1 .
Calibration value = (t _UNIT1 -t _UNIT0 ) / (t _RTC1 -t _RTC0 ) (2)
That is, calibration value = unit elapsed time / RTC elapsed time.

After the new calibration value is calculated, in step S550, the data stored in the calibration value storage unit 34 is updated with the set data composed of the new calibration value and the corresponding unit ID. Then, in step S560, to be used for the next calibration value updating process, to impart a value of t _{RTC 1} to t _RTC0, imparts the value of t _UNIT1 to t _UNIT0. That is, in the next calibration value update process, the elapsed time is calculated based on the previously acquired RTC time and measurement time.

As described above, the method for calculating the calibration value based on the time at which the update cycle starts (reference time and measurement time) and the time at which the update cycle is reached (reference time and measurement time) has been exemplified. It is not limited to this. For example, the calibration value can be calculated from the time at which synchronization starts (reference time and measurement time) and the time to reach the update cycle (reference time and measurement time). That is, when the reference time of RTC33 at the start of synchronization acquired in step S510 is t _RTC00 and the measurement time in the set data is t _UNIT00 , in step S540, the calibration value = (t _UNIT1 -t _UNIT00 ) / ( t _RTC1 -t _RTC00 ). Since the time t _RTC00 and t _UNIT00 at the start of synchronization are always used when calculating the calibration value, step S560 for newly giving a value to the time is not necessary.

  In order to promote understanding of the present invention, the processing flow of the present invention will be described with an example. Since the processing applied to the set data of any of the units 41 to 4n is the same, only the unit 41 will be described as an example.

For example, when the measurement data synchronization system starts the synchronization process from time _10:00 : 00, the time t _RTC0 of _{RTC 33} is _{10:00: 00} . At this time, the data processing device 30 stores the set data supplied from the unit 41 to the general-purpose signal line 10 in the set data storage unit 31 via the general-purpose communication circuit 10A, and the measurement time t _UNIT0 in the set data is 9:58. : 00 is assumed. Based on the unit ID (ID of the unit 41) in the set data, the synchronization calculation unit 35 searches whether the calibration value corresponding to the unit ID is stored in the calibration value storage unit 34. If there is a corresponding calibration value, the calibration value is read. If there is no corresponding calibration value, 1 is assigned to the calibration value. Thereafter, the synchronization calculation unit 35 performs time calibration on the set data of the unit 41 using the calibration value.

The calibration value update process also starts at 10:00: 00 when the synchronization process starts. Note that the calibration value is not updated at this time because a predetermined update cycle (for example, 6 hours) has not yet been reached soon after the start of processing. A predetermined update period is reached when the measurement data synchronization system operates until time 16:00. At this time, the time t _RTC1 of the RTC ₃₃ is 16:00:00. If the measurement time t _UNIT1 in the unit 41 data at this time is 15:58:01, the calibration value = (t _UNIT1 -t _UNIT0 ) / (t _RTC1 -t _RTC0 ) = 6 hours 1 second / 6 hours = 1 + 5 × 10 ^-5 . In the subsequent synchronization processing, the synchronization calculator 35 performs calibration using the updated calibration value.

  According to the above-described measurement data synchronization system, it is not necessary to provide a synchronization signal to each unit (measurement device), and thus no special hardware device used for this is required. Further, since it is not necessary for the unit to record the reference time and send it back to the data processing apparatus, it is not necessary to provide a special mechanism used for this in the hardware of the unit.

  Further, according to the measurement data synchronization system, each unit is identified by the unit ID and the synchronization process is performed, so that the synchronization process that matches the user's request can be performed.

  Further, according to the above measurement data synchronization system, the measurement time calibration process is performed using the measurement time calibration value stored in advance in the calibration value storage unit, and therefore the synchronization process can be performed immediately after the start of measurement. In addition, since the measurement time calibration value is updated at a predetermined update cycle, the fluctuation state of the clock of the unit within the update cycle is reflected in the measurement time calibration value, and the error of the synchronization result can be reduced.

  Although specific embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. Various modifications are possible without departing from the spirit of the present invention. For example, in the above description, the RTC 33 acquires the clock time of the data processing device 30 itself as the reference time, but may acquire the reference time from an external clock.

DESCRIPTION OF SYMBOLS 10 General-purpose signal line 10A General-purpose communication circuit 31 Set data storage part 32 Calibration value calculation part 33 RTC (Real Time Clock)
34 Calibration value storage unit 35 Synchronization calculation unit 36 Data storage unit after synchronization

Claims (18)

In a measurement data synchronization system that performs synchronization processing on measurement data from multiple measuring instruments,
A signal line;
A plurality of measurement devices that output to the signal line a set of data consisting of at least measurement data obtained by measuring the measurement target, a measurement time at which the measurement is performed, and a measurement device ID for marking the measurement device;
Obtaining the set data from the plurality of measurement devices from the signal line, based on the measurement device ID in the set data, obtaining a measurement time calibration value corresponding to the measurement device ID stored in advance, A measurement data synchronization system comprising: a data processing device that calibrates the measurement time in the set data by the measurement time calibration value.   2. The measurement data synchronization system according to claim 1, wherein the data processing device performs a resampling process on the measurement data in the set data based on a measurement time after calibration. The data processing device includes:
A set data storage unit for storing the set data input from the plurality of measuring devices via signal lines;
A calibration value storage unit for storing the measurement device ID and the measurement time calibration value corresponding to the measurement device ID in association with each other;
The set data is acquired from the set data storage unit, the measurement time calibration value corresponding to the measurement device ID is acquired from the calibration value storage unit based on the measurement device ID in the set data, and then the measurement time 3. The measurement data synchronization system according to claim 2, further comprising a synchronization calculation unit that corrects the measurement time in the set data with a calibration value and performs the resampling process. The synchronous operation unit
The set data is acquired from the set data storage unit, the measurement time calibration value corresponding to the measurement device ID is acquired from the calibration value storage unit based on the measurement device ID in the set data, and then the measurement time A measurement time calibration unit that corrects the measurement time in the set data by a calibration value;
A post-time calibration data storage unit for storing the set data subjected to time correction by the measurement time calibration unit;
A resampling processing unit that performs resampling processing on the set data stored in the data storage unit after time calibration,
4. The measurement data synchronization system according to claim 3, further comprising a post-synchronization data storage unit that stores set data that has been subjected to resampling processing by the synchronization calculation unit.   5. The measurement data synchronization system according to claim 4, wherein the measurement time calibration unit calibrates the measurement time based on a formula of calibration after measurement = measurement time / measurement time calibration value. The data processing device includes:
A real-time clock unit that provides a reference time for calibrating the measurement time;
The set data is periodically acquired from the set data storage unit at a predetermined update period, the reference time is acquired from the real-time clock unit, and then the measurement time calibration is performed based on the measurement time and the reference time in the set data. 6. The method according to claim 1, further comprising a calibration value calculation unit that calculates a value and associates the calculated measurement time calibration value with a corresponding measurement device ID and stores the value in the correction value storage unit. The measurement data synchronization system according to item 1.   7. The measurement data synchronization system according to claim 6, wherein the real-time clock unit acquires a clock time of the data processing device itself as the reference time.   7. The measurement data synchronization system according to claim 6, wherein the real-time clock unit acquires the reference time from an external clock. The calibration value calculation unit calculates the measurement time calibration value based on the equation: measurement time calibration value = (t _UNIT1 -t _UNIT0 ) / (t _RTC1 -t _RTC0 ), and t _RTC0 is the time when the update period starts. T _UNIT0 is the measurement time in the set data when starting the update cycle, t _RTC1 is the reference time when the update cycle is reached, and t _UNIT1 is when the update cycle is reached 7. The measurement data synchronization system according to claim 6, wherein the measurement data is a measurement time in the set data. The calibration value calculation unit calculates the measurement time calibration value based on the equation: measurement time calibration value = (t _UNIT1 -t _UNIT00 ) / (t _RTC1 -t _RTC00 ), and t _RTC00 is a reference for starting synchronization. T _UNIT00 is a measurement time in the set data when synchronization is started, t _RTC1 is a reference time when the update period is reached, and t _UNIT1 is the set data when the update period is reached. 7. The measurement data synchronization system according to claim 6, wherein the measurement time is at a measurement time. In a measurement data synchronization method that performs synchronization processing on measurement data from multiple measuring instruments,
A plurality of measurement devices output at least the measurement data of the measurement target, the measurement time at which the measurement is performed, and the measurement device ID for marking the measurement device to the signal line,
A data processing device acquires the set data from the plurality of measurement devices from the signal line, and based on the measurement device ID in the set data, a measurement time calibration value corresponding to the measurement device ID stored in advance is obtained. A measurement data synchronization method characterized by calibrating the measurement time in the set data with the measurement time calibration value after acquisition.   12. The measurement according to claim 11, wherein the data processing device performs resampling processing on the measurement data in the set data based on the measurement time after calibration, and stores the resampled set data. Data synchronization method.   12. The measurement data synchronization method according to claim 11, wherein the measurement time is calibrated on the basis of the equation: measurement time after calibration = measurement time / measurement time calibration value.   The data processing device periodically calculates the measurement time calibration value based on a reference time and a measurement time in the set data at a predetermined update cycle, and stores the calculated measurement time calibration value in association with a corresponding measurement device ID. 12. The measurement data synchronization method according to claim 11, wherein:   15. The measurement data synchronization method according to claim 14, wherein the reference time is generated from a clock of the data processing device itself.   15. The measurement data synchronization method according to claim 14, wherein the reference time is generated from an external clock. Measurement time calibration value = (t _UNIT1 -t _UNIT0 ) / (t _RTC1 -t _RTC0 ) The measurement time calibration value is calculated, where t _RTC0 is the reference time when the update cycle starts, and t _UNIT0 is the measurement time in the set data when starting the update cycle, t _RTC1 is the reference time when reaching the update cycle, and t _UNIT1 is the measurement time in the set data when reaching the update cycle 12. The measurement data synchronization method according to claim 11, wherein: Measurement time calibration value = (t _UNIT1 -t _UNIT00 ) / (t _RTC1 -t _RTC00 ) The measurement time calibration value is calculated. T _RTC00 is the reference time when synchronization starts, and t _UNIT00 is It is a measurement time in the set data when synchronization is started, t _RTC1 is a reference time when the update period is reached, and t _UNIT1 is a measurement time in the set data when the update period is reached. 12. The measurement data synchronization method according to claim 11, wherein: