摘要
热敏电阻特性方程直接决定了温度的测量精度,分别介绍三种NTC热敏电阻的拟合方法,给出了相应方程参数的求解方法,并提出了基于交叉验证的切比雪夫多项式拟合方次的自适应算法.通过实验室校准表明,Steinhart-Hart方程以及切比雪夫多项式的最小二乘拟合具有较高的精度,切比雪夫多项式自适应算法所确定的拟合方程具有更好的拟合效果.
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.
出处
《中国计量学院学报》
2012年第1期75-79,共5页
Journal of China Jiliang University
基金
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)
关键词
NTC热敏电阻
特性方程
拟合方法
NTC thermistors
characteristic equation
fitting methods
