STUDY OF THE INFLUENCE OF THE TEMPERATURE ERROR OF EDDY CURRENT DISPLACEMENT TRANSDUCER TAKING
INTO ACCOUNT THE INFLUENCE OF INCOMPLETE COMPENSATION OF THE UNINFORMATIVE PARAMETER 

Abramov Sergey Vladimirovich, leading engineer, Scientific-research Institute of physical measurements (8/10 Volodarskogo street, Penza, Russia), E-mail: abramov2011s@mail.ru
Ul'yanin Nikolay Sergeevich, leading engineer, Scientific-research Institute of physical measurements (8/10 Volodarskogo street, Penza, Russia), E-mail: koluanul@mail.ru 

621.3.014.14:621.3.088 

10.21685/2307-5538-2019-2-5 

Background. The study of temperature errors of primary eddy current transducers (PVP) is an urgent problem in the measurement of displacements, especially for quasidifferential schemes, in which in addition to assessing the temperature effect on the output signal of PVP, it is necessary to take into account the influence of the incompensation of the uninformative parameter. The aim of the work is to assess the effect of temperature on the output signal of PVP under the influence of not full compensation of the uninformative parameter of the equivalent circuit.
Materials and methods. To solve this problem, a model of PVP based on differential equations relating the input voltage to the output current is created.
Results. With the help of the proposed model, the output current of the measuring circuit is estimated under the influence of temperature and under the condition of incomplete compensation of the uninformative parameter. The relative measurement errors are calculated.
Conclusions. The results obtained in the article prove the need for identical manufacture of measuring and compensation inductors. 

equivalent circuit, the initial phase, the primary eddy current transducer, data signal, reduced error