MODELING OF MEASUREMENT CIRCUITS CAPACITIVE SENSORS IN THE SIMINTECH ENVIRONMENT 

Igor N. Vorotnikov, Candidate of technical sciences, associate professor, head of sub-department of electrical engineering, automation and metrology, Stavropol State Agrarian University (12 Zootekhnicheskiy lane, Stavropol, Russia), E-mail: vorotn_in@mail.ru
Maxim A. Mastepanenko, Candidate of technical sciences, associate professor, associate professor of sub-department of electrical
engineering, automation and metrology, dean of the faculty of electric power engineering, Stavropol State Agrarian University (12 Zootekhnicheskiy lane, Stavropol, Russia), E-mail: mma_26@inbox.ru
Shaliko Zh. Gabrielyan, Candidate of agricultural sciences, associate professor, associate professor of sub-department of electrical engineering, automation and metrology, deputy dean of the faculty of electric power engineering, Stavropol State Agrarian University (12 Zootekhnicheskiy lane, Stavropol, Russia), E-mail: shaliko69@mail.ru
Stanislav V. Mishukov, Assistant of sub-department of electrical engineering, automation and metrology, Stavropol State Agrarian University (12 Zootekhnicheskiy lane, Stavropol, Russia), E-mail: stas.mishukov.92@mail.ru 

621.317.73 

10.21685/2307-5538-2021-3-6 

Background. The possibility of constructing non-standard multi-element measurement circuits of capacitive sensors in the SimInTech dynamic modeling environment is investigated. Materials and methods. On the basis of the built-in libraries of the software environment, computer modeling of measuring circuits of sensors is performed using two methods of constructing the model – я and experimental. Results. Models of an operational amplifier and a measuring circuit of a four-element RC circuit are constructed, their operability is checked and a comparative analysis is carried out with existing mathematical models. Based on the SimInTech programming language, a separate calculation block is programmed, which allows performing complex computational operations directly in the model. Experimental and calculated curves describing the dependence of the change in the output voltage on the nominal parameters of the measuring circuit are obtained. Conclusion. The working model of the operational amplifier is developed and the expediency of using the environment for the study of multi-element measuring circuits of capacitive sensors based on the built-in mathematical solver is confirmed. 

simulation, measuring circuit, capacitive sensor, time diagram, substitution circuit