福建师范大学学报（自然科学版）2017，Vol.33Issue(2)：32-37,6.DOI:10.12046/j.issn.1000-5277.2017.02.005
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
摘要
Abstract
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 technology 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Key words
PT1000/temperature measurement/high-precision/least squares分类
信息技术与安全科学引用本文复制引用
管立伟,廖全当,李正念,卢宇,黄志平,任建明..基于PT1000的太阳能光热实验系统温度测试技术研究[J].福建师范大学学报（自然科学版）,2017,33(2):32-37,6.基金项目
福建省教育厅科技项目(JAT160105) （JAT160105）
福建省高新技术计划重点项目(2012H0021) （2012H0021）
