基于PT1000的太阳能光热实验系统温度测试技术研究  

Research on Temperature Measurement Technology of Solar Thermal Experimental System Based on PT1000

作　　者：管立伟[1,2] 廖全当 李正念 卢宇[1,2] 黄志平[1,2] 任建明[1] GUAN Li-wei LIAO Quan-dang LI Zheng-nian LU Yu HAUNG Zhi-ping REN Jian-ming(College of Physics and Energy, Fujian Normal University, Fuzhou 350117, China Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, Fuzhou 350117, China)

机构地区：[1]福建师范大学物理与能源学院,福建福州350117 [2]福建省量子调控与新能源材料重点实验室,福建福州350117

出　　处：《福建师范大学学报（自然科学版）》2017年第2期32-37,共6页Journal of Fujian Normal University：Natural Science Edition

基　　金：福建省教育厅科技项目(JAT160105);福建省高新技术计划重点项目(2012H0021)

摘　　要：设计并实现了基于恒流源驱动四线制PT1000的高精度温度测试系统,分析了温度测试系统中恒流源电路、信号调理电路、A/D转换等单元电路的设计依据和工作原理,给出了电路结构和相关参数.系统引入分段线性化算法,采用最小二乘法对实测数据进行线性拟合,并利用误差评估原理对拟合结果进行评估来确定适用于PT1000的最佳校正方程.实验表明,该系统的精度在0~90℃范围内优于±0.1℃,适用于高精度温度测试,相关技术已应用于福建师范大学新能源工程中心的太阳能光热实验教学系统中.This paper designs and realizes the high-precision temperature measurement system based on PT1000 which is driven by four-wire constant-current source, it analyzes the operation principles and design basis of the functional circuits in this temperature measurement system, which consists of constant-current source, signal processing and A/D conversion, it also gives circuit structures and parameters. The System using piecewise linearization algorithm, using the least square method for linear fitting the measured data, and it also uses the principle of fitting error evaluation to evaluate the results to determine the best correction equation suitable for PT1000. Experiments show that in the temperature measurement range of 0 -90 ℃, the accuracy can be up to ± 0. 1 ℃, which verifies the system can be used for high precision temperature test. The related tech- nology has been applied to solar-thermal experiment teaching system of new energy engineering center of fujian normal university.

关 键 词：PT1000 温度测量 高精度 最小二乘法 

分 类 号：TP27[自动化与计算机技术—检测技术与自动化装置] TK51[自动化与计算机技术—控制科学与工程]