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Increasing of the Accuracy of Signalsʼ Time Parameters Measuring Using Double Pulse Trains

https://doi.org/10.21122/2220-9506-2021-12-4-323-331

Abstract

In modern diagnostics, much attention is paid to measuring of time parameters, as well as their change over time. The purpose of this work is to develop a method for measuring of time intervals which made it possible to increase the measurement accuracy by reducing errors associated with the instability of main parameters of the pulse signal.

In the most of approaches used, the error associated with the instability of main parameters of signals under study is not enough taken into account. As an alternative, a spectral method is proposed in which the measurement of time intervals, as well as their changes, is performed based on the analysis of pulse sequences formed on the basis of characteristic points of the measured signal. For this a double pulse sequence was considered, an equation for the amplitudes of its spectral components was obtained, and in accordance with this it was determined that the delay time between double pulses is the most informative parameter.

Using the Mathcad software, an analysis of the sensitivity regions was carried out for the change in the main parameters of the pulse sequence, namely the repetition rate, as the main destabilizing factor.

As a result of the implementation of the developed technique, a structural diagram of the measuring system is proposed and an analysis of the measurement error associated with the instability of the main parameters of the pulse sequence is carried out. This error is estimated to be less than 0.01 %.

The considered method makes it possible to increase the accuracy of measuring time intervals due to the almost complete elimination of the influence of the instability of the reference frequency and the amplitude of the generated pulses which is unattainable with modern hardware, including digital signal processing.

 

About the Authors

A. V. Isaev
Belarusian National Technical University
Belarus

Address for correspondence: Isaev A.V. Belarusian National Technical University, Nezavisimosti Ave., 65, Minsk 220013, Belarus
 e-mail: isaev0302@gmail.com



U. V. Suchodolov
Belarusian National Technical University
Belarus

Nezavisimosti Ave., 65, Minsk 220013



A. S. Sushko
Belarusian National Technical University
Belarus

Nezavisimosti Ave., 65, Minsk 220013



A. A. Sheinikau
Military Academy of the Republic Belarus
Belarus

Nezavisimosti Ave., 220, Minsk 220057



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Review

For citations:


Isaev A.V., Suchodolov U.V., Sushko A.S., Sheinikau A.A. Increasing of the Accuracy of Signalsʼ Time Parameters Measuring Using Double Pulse Trains. Devices and Methods of Measurements. 2021;12(4):323-331. (In Russ.) https://doi.org/10.21122/2220-9506-2021-12-4-323-331

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ISSN 2220-9506 (Print)
ISSN 2414-0473 (Online)