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Mekhatronika, Avtomatizatsiya, Upravlenie, 2017, vol. 18, no. 6, pp. 391395
DOI: 10.17587/mau.18.391-395


Improving the Accuracy of Measurement of Parameters of Capacitive Sensors

V. S. Melentiev , V. I. Batishchev, vib@list.ru, E. A. Susova, ims@samgtu.ru, The Samara State Technical University, Samara, 443100, Russian Federation

Corresponding author: Batishchev Vitalyi I., D. Sc., Professor, Head of Department, The Samara State Technical University, Samara, 443100, Russian Federation,
e-mail: vib@list.ru

Received on January 12, 2017
Accepted on January 26, 2017

Briefly considers the current state of the problem of precision measurement of parameters of capacitive sensors and measuring converters for their definition. It is established that at present, a proliferation of methods for the determination of parameters of capacitive sensors on individual instant values of the transition process in the measuring circuit when connected it to a DC voltage. In these methods the time measurement does not depend on the time constant of the measuring circuit, and is determined mainly by the measurement time of the instantaneous values of the signals and the implementation of the algorithm processing the measured values and the duration of the exemplary time interval. One of the problems arising in the implementation of measuring means that use such methods, is the effect of uninformative parameters of the measuring circuit and their instability on the result of the determination of informative parameters. Using the uninformative elements of the equivalent circuit of the sensor allows to determine their influence on informative parameters. A disadvantage of the known methods separate measurement sensors parameters is that they do not allow to define along with the capacity the multiple uninformative parameters. The aim of this work is to study a new method of measurement of parameters of capacitor sensors, which allows to determine the resistance of the connecting conductors that connect the sensor to the measuring circuit, and equivalent resistance due to losses in the insulating dielectric and leakage currents, which allows to increase the accuracy of measurement of capacitance.
Keywords: capacitive sensors, transient, instant values, an error, resistance of connecting conductors, insulation resistance, measuring circuit

Acknowledgements: This work was supported by RFBR, project
16-08-00252 .

For citation:

Melentiev V. S., Batishchev V. I., Susova E. A. Improving the Accuracy of Measurement of Parameters of Capacitive Sensors, Mekhatronika, Avtomatizatsiya, Upravlenie, 2017, vol. 18, no. 6, pp. 391395.

DOI: 10.17587/mau.18.391-395

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