基于广义延拓的Pt1000温度测量的模块设计  

Design of module for Pt1000 temperature measurement based on generalized extension approximation

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,山东青岛266071 [2]中国科学院国家天文台,北京100012

出　　处：《现代电子技术》2013年第4期168-170,共3页Modern Electronics Technique

基　　金：中国科学院国家天文台青年人才基金项目资助(0835032002)

摘　　要：针对Pt1000温度测量提出了一种基于广义延拓逼近法的新软件算法。介绍了一种采用惠更斯电桥进行Pt1000电阻测量,测量值经过AD623仪表放大器的信号调理和A/D转换进入到ARM STM32F单片机的主控单元,主控单元软件使用C语音进行广义延拓的新软件算法,得到温度值,误差小于0.050℃,该方法具有简单、实用、测温精度高、抗干扰能力强等特点。A new software algorithm based on generalized extension approximation is proposed to measure the temperature of Pt1000. A method to measure the Pt1000 resistance by Huygens bridge is introduced. The measured resistance value is sent into the control unit of ARM STM32F microcontroller after AD623 instrumentation amplifier signal conditioning and A/D conver- sion. The C language is used in the control unit software for the new software algorithm to get temperature value. The result shows that the temperature error is less than 0.050 ℃. This method has many characteristics such as simplicity, practicality, high precision, strong anti-interference, etc.

关 键 词：高精度温度测量 广义延拓逼近法 嵌入式系统 PT1000 

分 类 号：TN98-34[电子电信—信息与通信工程] TP271.4[自动化与计算机技术—检测技术与自动化装置]