一种NTC热敏电阻校正方程的试验研究  

Research of the NTC Thermistors Equation of Calibration

作　　者：张鹏超[1] 张强[2] 

机构地区：[1]陕西理工学院电气工程学院,陕西汉中723000 [2]陕西理工学院机械工程学院,陕西汉中723000

出　　处：《传感技术学报》2012年第2期220-223,共4页Chinese Journal of Sensors and Actuators

基　　金：国家科技计划项目(2009GJG00015);陕西省教育厅项目(09JS046)

摘　　要：为了校正NTC热敏电阻的校正方程,提高测温精度。通过对传统的指数方程进行线性变换,得到一种新的NTC热敏电阻温度计R-T特性关系,对此关系进行多阶最小二乘拟合,利用误差评判原理,确定最适合的NTC热敏电阻的校正方程。并且实际验证了此校正方程的测温精度可以满足更高精度要求的需要。In order to correct the NTC（Nagative Temperature Coefficient）thermistors calibration equation to improve the precision of temperature measurement through the transformation of the conventional index equation,a new special charecteristic of R-T NTC thermistor thermometer relation was obtained,for which the order least squares were estimated.By utilizing the principle of error judgement,the calibration equation of the most suitable NTC thermistor was decided.The results of experiments confirmed that the precison of measuring temperature by this calibration can meet the needs of even higher precision.

关 键 词：NTC热敏电阻温度计 校正方程 最小二乘法 线性变换 MATLAB 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]