UDC 53.088.23
STUDYING THE INFLUENCE OF THERMOCOUPLE CONTACT HAVING THE SURFACE OF THIN SAMPLE WITH LOW THERMAL CONDUCTIVITY ON TEMPERATURE MEASUREMENT ACCURACY
A. A. Fefelov, Ph.D. (Tech.), associate professor, Department of Industrial Electronics, RSREU, Ryazan, Russia;
orcid.org/0000-0003-3002-943X, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
A. N. Chuvilin, Master's student, RSREU, Ryazan, Russia;
orcid.org/0000-0002-6612-4685, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
The problem of achievable accuracy for contact method temperature measurements of the samples made of materials used for printed board bases is considered. The aim of the work is to estimate the errors when measuring sample surface temperature caused by the distortion of temperature field, thermocouple probe being in contact with the surface of the object studied. Numerical modeling of temperature distribution in the sample before and after its contact with a thermocouple probe was performed; the influence of sample thermal conductivity together with the area of thermocouple contact with the sample on temperature measurement error has been studied. The possibility of increasing the accuracy of temperature measurements by contact method introducing a thermal interface in the form of heat-conducting paste into contact area is considered.
Key words: : temperature measurement, thermocouple, measurement error