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《Journal of China University of Metrology》 2012-01
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Study on curve fitting methods of NTC thermistor characteristics

SUN Bin,YU Cong,ZHOU Wang-chao,ZHOU Hang-xia(College of Information Engineering,China Jiliang University,Hangzhou 310018,China)  
The temperature measurement accuracy is determined by thermistor characteristic equation.Three curve fitting methods of NTC thermistors and solutions methods of corresponding equations were introduced.An adaptive algorithm based on cross-validation for the powers of Chebyshev polynomials equation was proposed.It is shown that least squares for Steinhart-Hart equation and Chebyshev polynomials equation have great accuracy and the curve fitting equation determined by the adaptive algorithm for the Chebyshev polynomials method has better performance by experiment.
【Fund】: 国家863计划项目(No.2008AA09Z303);; 浙江省大学生科技创新活动计划项目(No.2011R409007)
【CateGory Index】: TM54
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