| 基于PT100的高精度温度采集系统设计与实验研究 |
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| 引用本文： | 张修太,胡雪惠,翟亚芳,张继军,秦长海.基于PT100的高精度温度采集系统设计与实验研究[J].传感技术学报,2010,23(6):812-815. |
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| 作者姓名： | 张修太 胡雪惠 翟亚芳 张继军 秦长海 |
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| 作者单位： | 安阳工学院电子信息与电气工程系,河南安阳,455000;信阳师范学院物理电子工程学院,河南信阳,464000 |
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| 摘 要： | 介绍了温度采集系统的硬件、软件设计和实验研究.系统由下位机和上位机构成,下位机硬件主要由温度传感器PT100、由仪用放大器AD620构成的调理电路、A/D转换器MAX197和微控器AT89S52构成,上位机为PC机.下位机软件用C言语编写,上位机软件用VB6.0设计而成.在恒流源的激励下,PT100的阻值随温度的变化转换成电压的变化,调理电路对电压信号进行放大、变换,输出0 V～5 V的标准信号,经A/D转换送下位机,再通过串行通信上传给PC机进行存储、显示和图形化.系统采用分段线性化算法,利用MATLAB软件进行最小二乘法线性拟合,得到不同温度区间上的标度变换算法.与WZPB-1型标准铂电阻温度计的对比实验结果表明该系统的测量精度优于±0.1℃,系统工作稳定、可靠.
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| 关 键 词： | PT100 温度采集 AD620 MAX197 MATLAB 最小二乘法 线性拟合 标度变换 |
The Design and Experimental Study of High Precise Temperature Acquisition System Based on PT100 |
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| ZHANG Xiutai,HU Xuehui,ZHAI Yafang,QIN Changhai,ZHANG Jijun.The Design and Experimental Study of High Precise Temperature Acquisition System Based on PT100[J].Journal of Transduction Technology,2010,23(6):812-815. |
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| Authors: | ZHANG Xiutai HU Xuehui ZHAI Yafang QIN Changhai ZHANG Jijun |
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| Affiliation: | ZHANG Xiutai1,HU Xuehui2,ZHAI Yafang1,QIN Changhai1,ZHANG Jijun11.Anyang Institute of Technology,Department of Electronic Information , Electrical Engineering,Anyang Henan 455000,China,2.Xinyang Normal University,College of Physics , Electronic Engineering,Xinyang Henan 464000 |
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| Abstract: | The design and experimentation of hardware and software of temperature acquisition system based on PT100 are introduced.This system is comprised of the upper computer which is personal computer and the lower computer which is mainly composed of temperature sensor,conditioning circuits made up of instrumentation amplifier AD620,A/D convertor MAX197 and microcontroller AT89S52.The softwares of the upper computer and lower computer are designed based on VB6.0,and the C-language respectively.The change of the P... |
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| Keywords: | PT100 AD620 MAX197 MATLAB |
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