低温余热制冷系统温度传感器测量准确性研究  

Research on Measuring Accuracy of Low-temperature Waste Heat Cooling System of Temperature Sensor

作　　者：栗鹏飞 杨永平[1] 

机构地区：[1]陕西理工学院机械工程学院,汉中723000

出　　处：《自动化与仪表》2014年第6期53-57,共5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)

摘　　要：为了提高低温余热吸收式制冷系统中温度的测量精度,提出一种基于Cu50热电阻温度传感器的校正测温方法。首先,对Cu50热电阻温度传感器进行多点标定,然后利用最小二乘法对实测R-T数据进行分段拟合。最后,采用拟合精度评估原理,确定出Cu50热电阻温度传感器的最佳校正方程。经实验验证,此校正方程有效地提高了低温余热吸收式制冷系统的测温精度。In order to improve low-temperature waste heat absorption cooling system measurement precision,a method of correction temperature metrical based on a CuSO thermal resistance temperature sensor was put forward. Firstly,the CuSO thermal resistance temperature sensor was multi-point calibrated,and then the least square method was used for the R-T data of actual measurement for piecewise fitting. Finally,by utilizing the principle of fitting precision judgement,the corrective equation of the most suitable Cu50 thermal resistance temperature sensor was decided. Experiments result show that the corrective equation more effectively improves the temperature measurement precision of low-temperature waste heat absorption cooling system.

关 键 词：Cu50热电阻温度传感器 传感器标定 最小二乘法 校正方程 MATLAB 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]