FPGA Implementation of Steinhart-Hart Equation for Accurate Thermistor Linearization

This paper presents fixed point operation-based Field Programmable Gate Arrays (FPGA) implementation of Steinhart-Hart Equation (SHHE) for thermistor linearization. FPGA implementation issues of SHHE are presented and their solutions are proposed and experimentally validated in a LabVIEW™ environmen...

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Bibliographic Details
Published inIEEE sensors journal Vol. 18; no. 6; pp. 2260 - 2267
Main Authors Rana, Kanwar Pal Singh, Kumar, Vineet, Dagar, Amit Kumar, Chandel, Ankit, Kataria, Akshay
Format Journal Article
LanguageEnglish
Published IEEE 15.03.2018
Subjects
Field programmable gate arrays
FPGA
Resistance
sensor linearization
Steinhart–Hart equation
Temperature distribution
Temperature measurement
Temperature sensors
thermistor
Thermistors
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Summary:This paper presents fixed point operation-based Field Programmable Gate Arrays (FPGA) implementation of Steinhart-Hart Equation (SHHE) for thermistor linearization. FPGA implementation issues of SHHE are presented and their solutions are proposed and experimentally validated in a LabVIEW™ environment. Experimental temperature calibration, performed using a M/S Fluke drywell calibrator, revealed a lowest nonlinearity of 0.11% for an industrial grade thermistor in the input temperature range from -20 °C to 120 °C. Therefore, the main contribution of this work is to demonstrate the lowest nonlinearity for a wider temperature range. This work is expected to be very useful to instrumentation engineers as it employs a time-tested technique, for thermistor linearization in FPGA, leading to the lowest nonlinearity for a larger input temperature range.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2018.2795098