Compensation of Thermocouple Nonlinearities with Embedded System

Engin M. , Engin D.

5th Mediterranean Conference on Embedded Computing (MECO), Bar, MONTENEGRO, 12 - 16 June 2016, pp.234-237 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/meco.2016.7525749
  • City: Bar
  • Country: MONTENEGRO
  • Page Numbers: pp.234-237


in this study, an embedded system that performs compensation of the thermocouple output characteristic curve nonlinearities was designed. Mixed-signal microcontroller's peripheral units are used to amplify the low output voltage of the thermocouple to a desired level and and converted to digital without additional circuit elements, and noise reduction is implemented with a digital filter. Cold junction compensation is implemented by the temperature sensor in the integrated circuit and thereafter output curve is linearized by look-up table and linear interpolation methods in the developed software. The developed algorithm is applied to a T type thermocouple and obtained results are presented.