A device and method for measuring precise time intervals based on real-time calibration
A precision time and interval measurement technology, which is applied to electrical unknown time interval measurement, devices for measuring time intervals, clocks and watches, etc., can solve the problems of inability to calibrate in real time and low measurement accuracy, to eliminate temperature changes, improve measurement accuracy, and ensure real-time effect
Active Publication Date: 2020-09-22
NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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Problems solved by technology
The above-mentioned traditional precision time interval measurement method often requires precise calibration of the measurement equipment to achieve high measurement accuracy, and the calibration of the measurement equipment is usually completed before the actual measurement, and cannot be calibrated in real time
Due to the influence of factors such as temperature changes and aging of component parameters, when the measuring equipment calibrated in advance is used, it will introduce a system measurement error of more than tens of picoseconds, and the measurement accuracy is relatively low.
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[0041] see figure 1 , the precise time interval measurement method based on real-time calibration of the present invention, comprises the following steps:
[0042] 1), output the measured door opening signal and door closing signal to the precision time interval measurement module 1 and the precision time interval measurement module 2 through a pulse distribution module;
[0043] 2) The arithmetic control unit controls the precision time interval measurement module 1, so that it is used to measure the time interval between the measured door opening and door closing signals;
[0044] 3) The operation control unit calibrates the precision time interval measurement module 2 by using the pulse signal generation module, and saves the calibration result parameters in the storage unit 2;
[0045] The calibration process for the precision time interval measurement module is accomplished through the following steps:
[0046] ①The operation control unit controls the pulse signal generat...
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The invention discloses a precision time interval measuring device and method based on real-time calibration. The method includes the steps: firstly, distributing and outputting a measured door opening signal and a measured door closing signal to a first precision time measuring module and a second precision time measuring module; secondly, measuring time interval between the measured door openingsignal and the measured door closing signal by the first precision time measuring module, calibrating the second precision time measuring module by a pulse signal generation module, jumping to a third step after calibration is completed, and jumping to a fourth step after measurement is completed; thirdly, measuring time interval between the measured door opening signal and the measured door closing signal by the second precision time measuring module, calibrating the first precision time measuring module by the pulse signal generation module, jumping to the second step after calibration is completed, and jumping to the fourth step after measurement is completed; fourthly, outputting a measuring result. The precision time interval measuring accuracy can be improved based on real-time calibration.
Description
technical field [0001] The invention belongs to the technical field of time interval measurement, in particular to a precise time interval measurement device and method based on real-time calibration. Background technique [0002] At present, commonly used precision time interval measurement methods include: analog interpolation method, vernier method, quantization time delay method and time-to-voltage conversion method, etc. The above-mentioned traditional precision time interval measurement method often requires precise calibration of the measuring equipment to achieve high measurement accuracy, but the calibration of the measuring equipment is usually completed before the actual measurement and cannot be calibrated in real time. Due to the influence of factors such as temperature changes and component parameter aging, the measurement equipment calibrated in advance will introduce system measurement errors of more than tens of picoseconds when used, and the measurement acc...
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IPC IPC(8): G04F10/04
CPCG04F10/04
Inventor 张首刚陈法喜赵侃刘涛
Owner NAT TIME SERVICE CENT CHINESE ACAD OF SCI