一种提高Pt1000铂电阻测温精度的新方法  

New method to impove temperature measurement accuracy of Pt1000

作　　者：田炳丽[1] 胡超[2] 丁风雷[1] 

机构地区：[1]青岛海军潜艇学院作战指挥系,山东青岛266071 [2]中国科学院国家天文台导航通信组,北京100012

出　　处：《机电工程》2013年第5期603-605,共3页Journal of Mechanical & Electrical Engineering

基　　金：中国科学院国家天文台青年人才基金资助项目(0835032002)

摘　　要：为解决铂电阻测温精度等问题,将广义延拓逼近法技术应用到提高铂电阻的测温精度中。开展了对提高测量精度的分析,在阐述广义延拓逼近法模型原理和具体算法实现过程的基础上,建立了广义延拓逼近法和测温精度的关系,提出了一种基于广义延拓逼近法来提高测温精度的新方法;在软件Matlab上对最小二乘法和广义延拓逼近法的测量温度精度校正进行了评价,同时对最小二乘法和广义延拓逼近法进行了比较仿真,得到了与之对应的温阻(T-R)曲线、温阻(T-R)转换精度比较曲线以及测温精度比较曲线。仿真结果表明,在同一个铂电阻、同样的硬件配置基础上,广义延拓逼近法模型的温度测量精度稍高于最小二乘模型的测温精度,特别是在边界附近,广义延拓逼近法模型的测温精度得到了大幅改善。In order to solve the problems of temperature acquisition,the generalized extended approximation was investigated.After the analysis of improving the temperature acquisition as well as the principle and the way to realize the algorithm,the relationship between generalized extended approximation and temperature acquisition was established,and a new method based on generalized extended approximation was put forward.The correction of temperature acquisition and a comparison between the least square method and generalized extended approximation was evaluated in the Matlab software.The corresponding curves of T-R,the precision of the T-R conversion and temperature acquisition were drawn.The experimental results show that the high accuracy can be obtained by the same Pt1000 and using the proposed approach,especially the zone of border of net.

关 键 词：PT1000 温度测量 精度 广义延拓 最小二乘法 

分 类 号：TH811[机械工程—仪器科学与技术]