[1]文小玲,郑耀中.铂电阻的非线性补偿方法分析[J].武汉工程大学学报,2008,(03):107-109. WEN Xiao ling,ZHENG Yao zhong.The nonlinear compensation method analysis of the platinum resistor[J].Journal of Wuhan Institute of Technology,2008,(03):107-109.
The traditional temperature measurement circuit and an improved circuit are analyzed in this paper, the improved circuit can be used to eliminate the influence of the wire resistance on the accuracy of temperature measurement. At the same time, the subleastsquares method is used to fit the curve of voltage varying with temperature in order to reduce the measurement error caused by the nonlinearity of the platinum resistor temperatureresistance curve.