管壳式发生器温度传感器测量的准确性校正  

Correction on measuring accuracy of the shell-and-tube generator of temperature sensor

作　　者：王金辉 杨永平[1] 

机构地区：[1]陕西理工学院陕西省工业自动化重点实验室,陕西汉中723000

出　　处：《陕西理工学院学报（自然科学版）》2015年第2期20-24,共5页Journal of Shananxi University of Technology:Natural Science Edition

基　　金：国家创新基金资助项目(12C26216106801);陕西省自然科学基金重点项目(2011JZ014);陕西理工学院研究生创新基金资助项目(SLGYCX1428)

摘　　要：对于太阳能吸收式制冷系统中管壳式发生器温度参数测量不准确的问题,采用多点标定Pt500温度传感器测出的数据得出关于R-T特性关系并对此关系进行分段,利用最小二乘法拟合和误差评估原理确定出对Pt500温度传感器最佳的校正方程。最后,用实验验证R-T特性关系与所得的最佳校正方程逼近度最高,即明显地提高了管壳式发生器温度测量的准确度。The problem remains that solar energy absorption cooling system shell-and-tube generator for temperature parameter can not be accurately measured. Through the Pt500 temperature sensor for multi-point calibration,the study obtains R-T property relationship. which is further segmented. By least-squares fitting and utilizing the principle of error estimation,the corrective equation of the most suitable Pt500 temperature sensor is determined. The conclusions of experiments confirm that the actual characteristics of R-T and the corrective equation have the highest approximation,which more effectively improves the accuracy of solar energy absorption cooling system shell-and-tube heat exchanger of temperature measurement.

关 键 词：最小二乘法 校正方程 MATLAB Pt500温度传感器 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]