• Rajesh Dey
• Dr Achintya Das

Thermocouples being inexpensive transducer are widely used in industry. In thermocouple a reference junction is required to make an absolute temperature measurement, here temperature difference between two junctions are measured or indicated .But the problem arises, when it shows the non-linearity in its output characteristics. Up to a certain temperature it is seen that the thermocouple gives a linear output. At first output voltage from the respective junction’s temperature difference is increased with the temperature difference in a linear manner. Then after a certain temperature difference level , the output voltage is increased in a nonlinear way. This involves complications in order to measure the exact temperature difference. This paper aims at developing a new approach for linearization of thermocouple response i.e. constant sensitivity at all points of measurement. Here piecewise linear approximation technique which is different gradient or gain for different interval is applied. The aim of this work is to extend the linearity range of the thermocouple to get better stability and measuring technique under discrepancy of temperature coefficient . The sensitivity error can also be minimized by this novel technique

Thermocouple, Transducer, novel technique, Linearization

"MINIMIZATION OF NON-LINEARITY IN TEMPERATURE DETECTORS USING ADAPTIVE TECHNIQUE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 4, page no.87-90, April-2019, Available :http://www.jetir.org/papers/JETIR1904K14.pdf

"MINIMIZATION OF NON-LINEARITY IN TEMPERATURE DETECTORS USING ADAPTIVE TECHNIQUE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 4, page no. pp87-90, April-2019, Available at : http://www.jetir.org/papers/JETIR1904K14.pdf