Study on NTC thermistor characteristic curve fitting methods

Author

Cong, Yu ; Wang-chao, Zhou ; Bin, Sun ; Hang-xia, Zhou

Author_Institution

Coll. of Inf. Eng., China Jiliang Univ., Hangzhou, China

Volume

4

fYear

2011

fDate

24-26 Dec. 2011

Firstpage

2209

Lastpage

2213

Abstract

Thermistor characteristic equation directly determines the temperature measurement accuracy. Three fitting equation of NTC thermistors and their corresponding mathematic solutions are introduced. An adaptive algorithm based on cross-validation is proposed to determine the degree of chebyshev polynomials equation. The experiment indicates that the method of least squares for Steinhart-Hart equation and chebyshev polynomials equation has higher accuracy, and the equation determined by adaptive algorithm for the chebyshev polynomials method has better performance.

Keywords

Chebyshev approximation; curve fitting; least squares approximations; temperature measurement; thermistors; Chebyshev polynomials equation; NTC thermistor characteristic; Steinhart-Hart equation; adaptive algorithm; cross-validation; curve fitting methods; mathematic solutions; temperature measurement accuracy; thermistor characteristic equation; Chebyshev approximation; Fitting; Mathematical model; Ocean temperature; Polynomials; Temperature measurement; NTC thermistors; Steinhart-Hart equation; chebyshev polynomials; fitting curve;

fLanguage

English

Publisher

ieee

Conference_Titel

Computer Science and Network Technology (ICCSNT), 2011 International Conference on

Conference_Location

Harbin

Print_ISBN

978-1-4577-1586-0

Type

conf

DOI

10.1109/ICCSNT.2011.6182415

Filename

6182415