高精度冻土层温度梯度检测系统的设计  

The Design of High-Precision Temperature Detection System for the Active Layer of Permafrost

作　　者：左广宇 杜超[1,2] 秦建敏[1,2] 邓霄[1,2] 侯煜[3] 

机构地区：[1]太原理工大学新型传感器与智能控制教育部与山西省重点实验室,太原030024 [2]太原理工大学物电学院,太原030024 [3]中国水利水电科学研究院,北京100038

出　　处：《电子器件》2016年第2期469-474,共6页Chinese Journal of Electron Devices

基　　金：国家自然科学基金项目(51279122);国家自然科学基金青年科学基金项目(51205273);水利部公益性行业专项经费项目(1261530110110);中俄国际合作项目(51511130042)

摘　　要：针对冻土层对温度梯度高精度自动检测的需求,设计了一种高精度低功耗温度梯度自动检测系统。选取性能稳定的恒流源REF200与四线制接法的铂电阻Pt100构成系统的温度检测单元,通过MSP430单片机控制CPLD与多路开关集成电路,实现了温度检测点的自动切换,完成温度梯度信号的自动检测,通过GPRS数据传输技术,使获取的现场温度梯度数据可以实现远程实时调用。经实验室模拟试验,采集数据经专用算法优化处理后,温度单点检测精度可达到±0.1℃。In response to the demand for permafrost active layer of high-precision detection of the temperature gradi-ent,a low-power high-precision automatic temperature detection system is designed. The system uses a stability con-stant current excitation source and chooses industrial grade Pt100 which are four-wire connection as temperature sensors. MSP430 microcontroller signal acquisition and processing circuit control the CPLD multiple signal switch-ing circuit and multiple switch integrated circuit to realize the automatic switching of temperature detection point and to achieve the automatic collection of temperature gradient signal. By means of a public mobile communications platform,the system will use GPRS data transmission technology to achieve data transferring and data calling. After a laboratory simulation test,the system uses a special software algorithm to optimize the accuracy of the original da-ta,and temperature detection accuracy of a single point can reach ±0.1℃.

关 键 词：冻土层温度梯度检测 PT100 算法优化 高精度 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置] TP274[自动化与计算机技术—控制科学与工程]