Study of the error of the method of determination of parameters of capacitor sensors on instant values of transient processes
In the control of parameters technological processes, which allow to do the continuous monitoring of the properties or conditions of various materials, grading products by the geometric dimensions, control of movement or position of the mechanisms, widespread capacitive sensors. Currently, high performance provide methods and systems of determining parameters of capacitive sensors for individual instantaneous values of the transition process in the measuring circuit when their connected to a DC voltage. The use of such methods provides a reduction in measurement time, which does not depend on the time constant of the measuring circuit, and is mainly determined by the duration of intervals used to implement the methods. One of the problems arising in the implementation of measurement tools using similar techniques, it is the effect of uninformative parameters of the measuring circuit and their instability on the result of the determination of informative parameters. Accounting uninformative elements of the equivalent circuit of the sensor allows to determine their influence on informative parameters. The aim of this work is to study the influence of resistance of connecting wires that connect the sensor to the measurement circuit, on capacity measurement error.