JP2000010933A - Method and device for data synchronism correction and storage medium where data synchronism correcting program is stored - Google Patents

Abstract

PROBLEM TO BE SOLVED: To precisely time synchronize data obtained by individual gathering means to one another by changing the states of various signal data and detecting the changes, and making corrections according to the time information characteristic of the data given at the time of data gathering so that the respective data have the same state change time. SOLUTION: Time information composition parts 31 to 33 adds the time information generated by gathering time generation parts 21 to 23 to the data gathered by data gathering parts 11 to 13 and supply the resulting data to data storage parts 41 to 43. A signal change generation part 7 changes the states of the signal data. A signal change detection part 5 detects the time when the data change through the operation of the signal change generation part 7 from the data which are stored in the data storage parts 41 to 43 and given the time information. A time correction part 6 makes correction according to the time detected by the signal change detection part 5 so that the data gathered by the data gathering parts 11 to 13 have the same state change time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data synchronization correction method and apparatus and a storage medium storing a data synchronization correction program, and more particularly to an apparatus for collecting various signal data in a time series. The present invention relates to a data synchronization correction method and apparatus for efficiently time-synchronizing data obtained, and a storage medium storing a data synchronization correction program.

[0002]

2. Description of the Related Art Conventionally, when collecting various signal data,
For image data, a camera and a video recorder, and for signal data, a dedicated collection unit corresponding to individual data such as a data collection device via an A / D board in an electronic computer (including a personal computer) is used. Have been.

[0003] Further, Japanese Patent Application No. Hei 8-
2015550 “Multimedia data storage / playback device” is disclosed. This method collects individual collected data as digital data on a personal computer,
By assigning time information obtained by a single time information synthesizing device to the data of each collection cycle, each data is time-synchronized.

[0004]

However, in the above-mentioned conventional data collection method using dedicated collection means, it is difficult to accurately time-synchronize each data. To accurately synchronize various signals with time,
It is necessary to take into consideration the difference in the collection cycle of the plurality of data collection units to be used, the fluctuation of the collection cycle, the delay in initializing the data collection unit at the start of collection, and the like.

In the case of the apparatus disclosed in Japanese Patent Application No. Hei 8-201550, each piece of data is provided with time information by a single acquisition time generation apparatus. Therefore, if the delay from the start of data collection to the actual measurement of data is different for each data measurement unit, the time delay from the measurement of data to the transfer of data to the time information synthesizing device is , It is difficult to accurately time-synchronize data with time information given by a single acquisition time generation device.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has a data synchronization correction method and apparatus for accurately time-synchronizing data acquired by individual data collection means, and a storage storing a data synchronization correction program. The purpose is to provide a medium.

[0007]

FIG. 1 is a diagram for explaining the principle of the present invention. The present invention (claim 1) provides a data synchronization correction method for synchronizing various signal data with time when various signal data is collected as time-series data using a plurality of data collection units. A state change is generated (Step 1), data is collected by a plurality of data collection means (Step 2), and unique time information at the time of data collection is added to the collected data (Step 3). A change is detected (step 4). When a state change is detected, a state change time is detected based on time information unique to the data (step 5).
Correction is made so that the state change times of the collected data are matched (step 6).

According to the present invention (claim 2), data collected and added with unique time information at the time of data collection is stored for each data collecting means, and a state change of the stored data is detected. , The state change time is detected from the unique time information of the data. The present invention (claim 3) provides a data synchronization correction for time-synchronizing the data collected by the data collection means when collecting image and various signal data as time-series data using a plurality of data collection means. In the method, data including the occurrence of a state change is collected as image and signal data, unique time information is added to the collected data, and after the data collection, the unique time information added to the collected data is added. Based on the detected state change time,
Correction is made so that the state change times of the collected data are matched.

According to the present invention (claim 4), data collected and added with unique time information at the time of data collection is stored for each data collecting means, and a state change is detected from the stored data. , The state change time is detected from the unique time information of the data. FIG. 2 is a diagram illustrating the principle of the present invention.

The present invention (claim 5) is a data synchronization correction device for synchronizing various signal data with time when various signal data are collected as time-series data using a plurality of data collection means 1. Signal change generating means 7 for giving a state change to the signal data; time information adding means 3 for giving unique time information at the time of data collection to the data collected by the plurality of data collecting means 1; When a state change occurs in the received data by the signal generation unit 7, the signal change detection unit 5 that detects the state change time given to the data and the state change time of each of the collected data are corrected to match. Time correction means 6.

According to the present invention (claim 6), the signal change detecting means 5 stores, for each data collecting means, data collected and provided with unique time information at the time of data collection, A means for detecting a state change of data stored in the data storage means to detect a state change time from time information unique to the data is included.

According to the present invention (claim 7), when images and various kinds of signal data are collected as time-series data using a plurality of data collection means, the data collected by the data collection means is time-synchronized. A data synchronization correction device, comprising: signal change generating means for giving a state change to signal data; data collection means for collecting data given a state change by the signal change generation means; and a signal change for displaying a state change. Display means, image data collecting means for collecting the state change displayed by the signal change generating means as image data, time information giving means for giving unique time information to the collected data, data collecting means and image A state change of the data collected by the data collection unit is detected, and based on the unique time information given by the time information addition unit, the state change is performed. A signal change detection means for detecting,
Time correction means for correcting the state change times of the collected data so as to match each other.

According to the present invention (claim 8), in the signal change detecting means, the data collected and added with the unique time information at the time of data collection are stored in each of the data collecting means and the image data collecting means. It includes a storage unit and a unit that detects a state change of data stored in the data storage unit to detect a state change time from unique time information of the data.

According to the present invention (claim 9), when collecting various signal data as time-series data using a plurality of data collecting means, a data synchronization correction program for synchronizing the various signal data with time is stored. A storage medium,
A signal change generation process for giving a state change to the signal data, a time information giving process for giving unique time information at the time of data collection to the data collected by the plurality of data collection processes, A signal change detection process that detects a state change time given to the data when a state change occurs in the collected data by a signal generation process, and a time correction that corrects the state change time of each of the collected data so as to match each state change time Process.

According to the present invention (claim 10), in the signal change detection process, the state change is detected by referring to the data-specific time information to which the collected and accumulated data-specific time information is added. Accordingly, the method includes a process of detecting the state change time from the unique time information of the data. The present invention (claim 11) provides a data synchronization correction for time-synchronizing data collected in the data collection process when collecting image and various signal data as time-series data using a plurality of data collection processes. A storage medium storing a program, comprising: a signal change generation process for giving a state change to signal data; a data collection process for collecting data given a state change in the signal change generation process; A signal change display process to be displayed, an image data collection process of collecting displayed signal changes as image data with a camera, a time information addition process of adding unique time information to the collected data, and a data collection process And the state change of the data collected by the image data collection process Based on the specific time information, and the signal change detection process for detecting the state change time,
A time correction process for correcting the state change times of the collected data so as to match each other.

According to a twelfth aspect of the present invention, in the signal change detecting process, the state change is referred to by referring to the unique time information of the data to which the unique time information at the time of data collection is accumulated and accumulated. Detecting the state change time from the unique time information of the data. As described above, the present invention provides a data collection device that collects various types of signal data as time-series data using a plurality of data collection units. After the data to which the state change is given is collected, the state change time of each piece of data added to the data is detected using the signal change detection means, and correction is performed so that the state change times of each piece of data match. This makes it possible to accurately synchronize the data collected by each data collection unit.

Further, according to the present invention, in a data collecting apparatus using a plurality of means for collecting images and various signal data as time-series data, in order to time-synchronize the data collected by each collecting means, a signal change generating means is provided. Displaying the signal given the state change on the signal change display means, collecting the displayed signal change as image data,
After the data collection, the state change time of each data added to the data is detected by using the signal change detection means, and the data collected by each data collection means is corrected by making the state change time of each data coincide. Can be accurately synchronized.

[0018]

FIG. 3 shows the configuration of a data synchronization correction device according to the present invention. The data synchronization correction device shown in FIG.
Three data collection units 11, 12, and 13, and a collection time generation unit 2 arranged for each of the data collection units 11, 12, and 13
1, 22, 23, time information synthesis sections 31, 32, 33, data storage sections 41, 42, 43, one signal change detection section 5, time correction section 6, and signal change generation section 7.

The data collection units 11, 12, and 13 collect data periodically or at an arbitrary time.
There are sensors, cameras, A / D boards, and the like. The collection time generation units 21, 22, and 23 independently count time and supply time information to the time information synthesis units 31, 32, and 33, respectively. (Including an internal clock).

The time information synthesizing units 31, 32, and 33 add the time information generated by the collection time generating units 21, 22, and 23 to the data collected by the data collecting units 11, 12, and 13, and This is supplied to each of the storage units 41, 42, and 43, and is configured as a sensor controller or a processing module of an electronic computer. Data storage unit 4
Numerals 1, 42, and 43 accumulate the respective data to which the time information supplied from the time information synthesizing units 31, 32, and 33 are added in a time series for each of the data collecting units 11, 12, and 13. , And a file storage device (such as a magnetic storage device).

The signal change generator 7 changes the state of the signal data. For example, when the data to be collected is an image from a camera and a digital signal from a digital board, means for changing the digital signal is provided. This is a device that can present the changed signal to a camera. The signal change detection unit 5 includes data storage units 41, 42, 4
3 for detecting the time at which the data has changed by the signal change generating unit 7 from the data to which the time information stored in 3 has been added, and is configured as a processing module of an electronic computer.

The time correction unit 6 is configured to control each data collection unit 11 based on the time detected by the signal change detection unit 5.
The correction is performed to match the state change times of the data collected in steps 12 and 13, and is configured as a processing module of an electronic computer. FIG. 4 is a flowchart showing the operation of the data synchronization correction method of the present invention. Step 10
1) The data collection units 11, 12, and 13 respectively collect data at a fixed cycle or at an arbitrary timing.

Step 102) Collection time generation unit 21,
In 22 and 23, the collection time is set to the time information synthesis units 31, 3
2 and 33 respectively. Further, the time information synthesizing units 31, 32 and 33 add the collected time generating units 21, 22 and 2 to the data collected by the data collecting units 11, 12 and 13.
3 is added to the collected data and transferred to the data storage units 41, 42, and 43, respectively, and stored in the data storage units 41, 42, and 43.

Step 103) When there is a state change in the signal by the signal change generation unit 7, the signal change detection unit 5 adds the time information synthesizing unit to the collected data stored in each of the data storage units 41, 42 and 43. At 31, 32, and 33, the state change time of data to which unique time information (state change time) is added is detected. Step 104) The time correction unit 6
Based on the state change time detected by the signal change detection unit 5, a correction is made to match the state change times of the collected data.

In the above description, only the data collection units 11, 12, and 13 are described in the configuration of FIG. 3, but the present invention is not limited to this example.
The number may be N, as long as the data collection unit is provided with a time information synthesis unit, a collection time generation unit, and a data storage unit. The image data collection by the camera will be described later.

[0026]

Embodiments of the present invention will be described below with reference to the drawings. [First Embodiment] In this embodiment, the data collection units 11, 1
An example in which the data collection cycle fluctuates in any of 2 and 13 will be described based on the configuration of FIG.

FIG. 5 shows the timing of data collection when the data collection cycle fluctuates in the data collection unit according to the first embodiment of the present invention. In the figure, the horizontal axis represents the time stamped by each of the collection time generation units 21, 22, and 23. It is assumed that the data collection unit 13 is performing data collection periodically in FIG.

FIG. 6 shows a data accumulation state in the data accumulation unit according to the first embodiment of the present invention. In the figure, the data obtained by the data collection units 11, 12, and 13 are respectively collected by the collection time generation units 21, 22, 2,
3 together with the time information given by the data storage unit 4
1, 42, and 43 are stored in chronological order. When the data collection times of the data collection units 11, 12, and 13 are at regular intervals, a number representing the order of data measurement can be used instead of the time information.

FIG. 7 is a diagram for explaining time synchronization correction according to the first embodiment of the present invention. In the figure, each of the data collection units 11, 12, and 13 starts data collection at the same time, and the time of each data collection (indicated by a circle in the figure, or
Data measurement is performed in (●). During the data collection period, the signal change generation unit 7 gives a signal such that each of the data collection units 11, 12, and 13 measures a state change. Thus, the signal change detection unit 5 obtains the state change time on the time axis of each of the data collection units 11, 12, and 13 from the data collected by the data collection units 11, 12, and 13. The time obtained by the signal change detection unit 5 in FIG.
Then, T1a and T1b, and in the data collection unit 12, T2
a, T2b, and T3a, T3b in the data collection unit 13.

As a result, the time correction unit 6 performs time correction of data by performing correction so that the state change times on the respective time axes match. For example, when the time axis of the other data collection units 12 and 13 is corrected by a linear expression with the time axis of the data collection unit 11 as a reference, the relationship between signal change times is

[0031]

(Equation 1)

The data collection units 11 and 12
Between the correction coefficients A and B, and the correction coefficient C of the data collection units 1 and 3.
And D, it is possible to accurately synchronize the data obtained by each of the data collection units 11, 12, and 13. The method described above is for a case where a data collection unit whose data collection time is not constant is used, but the time synchronization correction of data can be similarly performed even when a data collection unit which collects data at a constant interval is used. It is.

Further, by giving more state changes and increasing the time of data change to be matched, a correction coefficient that minimizes the least square error is obtained, and a time correction is performed using a higher-order correction function. Correcting the axis enables more accurate time synchronization. Further, the signal change generator 7
If all the data collection units 11, 12, and 13 cannot change the state at the same time, the data collection units 11 and 12, the data collection units 11 and 13, etc. separately change the state and correct the data. It is also possible to synchronize the time of the other data collection units 12 and 13 via the collection unit 11.

[Second Embodiment] In this embodiment, a signal whose state has been changed is displayed, the state change is collected as image data and signal data, and the state change time shown in the first embodiment is used. Is corrected in each data collection unit. FIG. 8 shows the configuration of the data synchronization correction device according to the second embodiment of the present invention. 3, the same components as those of FIG. 3 are denoted by the same reference numerals, and the description thereof will be omitted.

The data synchronization correction device shown in FIG. 1 has one data collection unit 11, two collection time generation units 21, 22,
The two time information synthesizing units 31 and 32, the data accumulating unit 41,
42, a signal change detection unit 5, a time correction unit 6, a signal change generation unit 7, a camera 8, and a signal change display unit 9.
The data collection unit 11 collects digital signal data.

Although the camera 8 originally collects image data for state monitoring and the like, it also collects, as a signal, a change in the image data displayed on the state conversion display unit 9 for data time synchronization correction. The signal change display unit 9 displays the signal change given by the signal change generation unit 7 with a light emitting object such as an LED.

FIG. 9 is a flowchart showing the operation of the data synchronization correction method according to the second embodiment of the present invention. Step 201) The data collection unit 11 starts each data collection. Step 202) In the collected data,
The signal given the state change is displayed on the signal change display section 9 as LE.
Display is performed using a light-emitting object such as D (signal change: LED ON / OFF). In addition, regarding the data collected,
The collection time generation unit 21 generates a collection time and transfers it to the time information synthesizing unit 31. The time information synthesis unit 31 adds the collection time to the collected data, transfers the data to the data storage unit 41, and stores the data.

Step 203) The camera 8 collects, as signal data, image data that captures a state change due to ON / OFF of the LED, and transfers the signal data to the time information synthesizing device 32. The time synthesizing device 32 adds the collection time of the image data provided by the collection time generation unit 22 and transfers it to the data storage unit 42 for storage. Step 204) The signal change detection unit 5 detects the state change time of the signal stored in the data storage unit 41 and the data storage unit 42, and transfers it to the time correction unit 6.

Step 205) The time correction unit 6 performs a correction process for matching the state change times of the data. FIG. 10 is a diagram for explaining the operation of the second embodiment of the present invention. In the figure, the example shown in the upper part is the time axis of the signal data collection unit 11, and the example shown in the lower part is the time axis of the camera 8.

In the same figure, twice (Tci, Tcj) given by the signal change generator 7 after the start of each data collection.
Are collected as digital data. The given change is also displayed on the LED (signal change display unit 9) at the same time, and the change is collected by the camera 8 as image data. The image data collected here is given a unique time by the time information synthesizing unit 32 and is stored in the data storage unit 42, and the time when the state is changed is obtained by the signal change detection unit 5. As shown in FIG. 10, on the time axis of the camera 8, time Tci, Tc
j, time Tdi and Tdj on the time axis of the digital collection board (data collection unit 11), respectively.

FIG. 11 shows the relationship between the times to be matched in the second embodiment of the present invention. The figure shows the time axis of each data collection unit 11. When the synchronization is corrected using the linear expression as described above, the expression Tci = Tdiα + β Tci = tdjα + β By obtaining the coefficients α and β, it is possible to correct the time synchronization between the two data.

In each of the above embodiments, FIGS.
However, the present invention is not limited to this example, and the configurations shown in FIGS. 3 and 8 are constructed as programs,
Disk devices connected to computers used as data synchronization correction devices, floppy disks, CD-
The present invention can be easily realized by storing it in a portable storage medium such as a ROM or the like and installing it when implementing the present invention.

It should be noted that the present invention is not limited to the above-described embodiment, but can be variously modified and applied within the scope of the claims.

[0044]

As described above, according to the present invention, it is possible to accurately synchronize various kinds of collected signal data with time.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining the principle of the present invention.

FIG. 2 is a principle configuration diagram of the present invention.

FIG. 3 is a configuration diagram of a data synchronization correction device of the present invention.

FIG. 4 is a flowchart showing the operation of the data synchronization correction method of the present invention.

FIG. 5 is an example of data collection timing when a data collection cycle varies in the data collection unit according to the first embodiment of this invention.

FIG. 6 is a diagram illustrating a data accumulation state in a data accumulation unit according to the first embodiment of this invention.

FIG. 7 is a diagram for explaining time synchronization correction according to the first embodiment of the present invention.

FIG. 8 is a configuration diagram of a data synchronization correction device according to a second embodiment of the present invention.

FIG. 9 is a flowchart showing the operation of the data synchronization correction method according to the second embodiment of the present invention.

FIG. 10 is a diagram for explaining the operation of the second embodiment of the present invention.

FIG. 11 is a diagram showing a relationship between times to be matched according to the second embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 data collecting means 3 time information adding means 5 signal change detecting means, signal change detecting section 6 time correcting means, time correcting section 7 signal change generating means, signal change generating section 8 camera 9 signal change displaying section 11, 12, 13 data Collection units 21, 22, 23 Collection time generation units 31, 32, 33 Time information synthesis units 41, 42, 43 Data storage units

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor: Honorary Endo 3-19-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Inside Japan Telegraph and Telephone Corporation (72) Inventor Eiji Mitsuya 3--19, Nishi-Shinjuku, Shinjuku-ku, Tokyo No.2 Nippon Telegraph and Telephone Corporation F-term (reference) 5B045 CC09

Claims (12)

[Claims] When collecting various kinds of signal data as time-series data using a plurality of data collecting means, a data synchronization correction method for time-synchronizing the various kinds of signal data includes: Generating the data, collecting the data by the plurality of data collection means, adding unique time information at the time of data collection to the collected data, detecting a state change of the data, detecting the state change A data change correction method, wherein a state change time is detected based on time information unique to the data, and correction is performed so that the state change times of the collected data match. 2. Data collected and provided with unique time information at the time of data collection is stored for each data collecting means, and a state change is detected from the stored data, 2. The data synchronization correction method according to claim 1, wherein the state change time is detected by referring to unique time information. 3. A data synchronization correction method for synchronizing data collected by said data collection means when collecting image and various signal data as time-series data using a plurality of data collection means. Collecting data including the occurrence of change as image and signal data, adding unique time information to the collected data, and after collecting the data, based on the unique time information given to the collected data, A data synchronization correction method comprising: detecting a state change time; and correcting the collected data so that the state change times of the collected data coincide with each other. 4. Data collected and provided with unique time information at the time of data collection is stored for each data collecting means, a state change is detected from the stored data, 4. The data synchronization correction method according to claim 3, wherein the state change time is detected from unique time information. 5. A data synchronization correction device for synchronizing various kinds of signal data with time when collecting various kinds of signal data as time-series data using a plurality of data collecting means. Signal change generating means for giving a state change; and data collected by the plurality of data collecting means,
Time information providing means for providing unique time information at the time of data collection; and a signal for detecting a state change time provided to the collected data when a state change has occurred in the signal change generating means. A data synchronization correction device comprising: a change detection unit; and a time correction unit that corrects the state change times of the collected data so as to match each other. 6. The data change detecting means includes: data storing means for storing, for each of the data collecting means, data collected and added with unique time information at the time of collecting the data; 6. The data synchronization correction device according to claim 5, further comprising means for detecting a state change time of the stored data from time information unique to the data by detecting a state change of the stored data. 7. A data synchronization correction device for time-synchronizing data collected by said data collection means when collecting image and various signal data as time-series data using a plurality of data collection means. Signal change generating means for giving a state change to the signal data; data collecting means for collecting data given a state change by the signal change generating means; signal change displaying means for displaying a state change; Image data collecting means for collecting the state change displayed by the signal change displaying means as image data; time information providing means for providing unique time information to the collected data; the data collecting means and the image data Detecting a state change of the data collected by the collecting unit, based on the unique time information given by the time information giving unit, A data synchronization correction apparatus comprising: a signal change detection unit that detects a state change time; and a time correction unit that corrects the collected data so that the state change times of the collected data match each other. 8. A data storage means for storing, for each of the data collection means and the image data collection means, data collected and provided with unique time information at the time of data collection, 8. The data synchronization correction device according to claim 7, further comprising means for detecting a state change time of said data stored in said data storage means, thereby detecting said state change time from unique time information of said data. 9. A storage medium storing a data synchronization correction program for time synchronizing various signal data when collecting various signal data as time-series data using a plurality of data collection means, A signal change generating process for giving a state change to the signal data; a time information providing process for providing unique time information at the time of data collection to the data collected by the plurality of data collecting processes; When a state change occurs in the collected data by the signal generation process, a signal change detection process for detecting a state change time given to the data and a state change time of each of the collected data are matched. Storage medium storing a data synchronization correction program, comprising: 10. The signal change detection process is characterized in that the data change is detected by referring to the collected and accumulated time information unique to the data to which the unique time information at the time of data collection is added, and detecting the state change. 10. A process for detecting the state change time from unique time information of the computer.
A storage medium storing the described data synchronization correction program. 11. A data synchronization correction program for synchronizing data collected in the data collection process when collecting image and various signal data as time-series data using a plurality of data collection processes. A storage medium, a signal change generation process for giving a state change to the signal data, a data collection process for collecting data given a state change by the signal change generation process, and a signal indicating the occurrence of a state change A change display process, an image data collection process of collecting displayed signal changes as image data with a camera, a time information providing process of providing unique time information to the collected data, Detecting a change in the state of the data collected in the image data collection process, A signal change detection process for detecting a state change time based on the unique time information given in the report giving process, and a time correction process for correcting the collected data to match the state change times. A storage medium storing a data synchronization correction program. 12. The signal change detection process refers to unique time information of data that has been collected and stored and provided with unique time information at the time of data collection,
12. The storage medium storing the data synchronization correction program according to claim 11, comprising a process of detecting the state change to detect the state change time from the unique time information of the data.