Bespal’ko, V.; Litvinenko, A.; Stepanovs, V.; Kurtenoks, V.; Smetska, V.; Lapkovskis, V. Compensation of Accuracy Error for Time Interval Measurements. Latvian Journal of Physics and Technical Sciences 2024, 61, 43–51, doi:10.2478/lpts-2024-0005.
Bespal’ko, V.; Litvinenko, A.; Stepanovs, V.; Kurtenoks, V.; Smetska, V.; Lapkovskis, V. Compensation of Accuracy Error for Time Interval Measurements. Latvian Journal of Physics and Technical Sciences 2024, 61, 43–51, doi:10.2478/lpts-2024-0005.
Bespal’ko, V.; Litvinenko, A.; Stepanovs, V.; Kurtenoks, V.; Smetska, V.; Lapkovskis, V. Compensation of Accuracy Error for Time Interval Measurements. Latvian Journal of Physics and Technical Sciences 2024, 61, 43–51, doi:10.2478/lpts-2024-0005.
Bespal’ko, V.; Litvinenko, A.; Stepanovs, V.; Kurtenoks, V.; Smetska, V.; Lapkovskis, V. Compensation of Accuracy Error for Time Interval Measurements. Latvian Journal of Physics and Technical Sciences 2024, 61, 43–51, doi:10.2478/lpts-2024-0005.
Abstract
A method of accuracy error compensation for the time interval is examined, allowing to eliminate the dependence of accuracy error on the duration of measured intervals and minimising the influence of destabilising factors - ambient temperature changes and the initial deviation of the meter clock generator frequency from the nominal value. The compensation method is based on a calibration procedure that measures precise time intervals under conditions of changing ambient temperature. Then the dependence of the accuracy error on temperature for a particular meter is recorded. Based on these data, a correction table is compiled containing correction factors and temperature values at which these factors were determined. Under real measurement conditions, the correction factor corresponding to the current temperature is determined from the table for measured results correction. The table with correction factor values could be stored in the memory of the meter or processing computer. Experimental verification of the method showed that applying a correction for a meter with a standard XO class clock generator (certificated instability of ±50 ppm) can obtain an equivalent clock generator instability of ±0.15 ppm. The application of the method is efficient in cases where the use of high-end clocking to ensure the required measurement accuracy is not economically feasible.
Keywords
measurement of time intervals; clock generator; accuracy error compensation; correction of measurement results
Subject
Engineering, Electrical and Electronic Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
,
,
,
,
*
