管壳式换热器温度传感器测量的准确性校正  

Correction on Measuring Accuracy of the Shell-and-tube Heat Exchanger 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,汉中723000

出　　处：《自动化与仪表》2015年第1期29-32,共4页Automation & Instrumentation

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);工业余热制冷关键技术研究;教育厅重点实验室项目(13JS025)

摘　　要：对于工业余热吸收式制冷系统中管壳式换热器温度参数测量不准确的问题,首先可以通过多点标定Pt500温度传感器测出的数据得出T-R特性关系,然后对此特性关系分段进行最小二乘法拟合,利用误差评估原理,确定出对Pt500温度传感器最佳的校正方程。最后,经试验验证实测T-R特性关系与此校正方程的逼近度最高,从而明显地提高了工业余热吸收式制冷系统管壳式换热器的温度测量的准确度。The problem was not be accurately measuredy,that industrial waste heat absorption cooling system shell- and-tube heat exchanger for temperature parameter. Firstly,through the Pt500 temperature sensor for multi-point calibration obtains T-R property relationships. This relationship was segmented least-squares fitting. Second,by utilizing the principle of error estimation,to determine the best for Pt500 temperature sensor calibration equation. Finally,the conclusions of experiments confirmed that the actual characteristics of T-R and the corrective equation have the highest approximation,which more effectively improves the accuracy of industrial waste heat absorption cooling system shell-and-tube heat exchanger of temperature measurement.

关 键 词：最小二乘法 Pt500温度传感器 校正方程 MATLAB 管壳式换热器 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]