微热管高精度测试系统的热源控制与温度采集  

Heat Source Control and Temperature Acquisition in High Accuracy Test System of Micro Heat Pipe

作　　者：王相蓉 罗怡[2] 王晓东[2] 李聪明 WANG Xiang-rong;LUO Yi;WANG Xiao-dong;LI Cong-ming(College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Key Laboratory for Precision and Non-traditional Machining of Ministry of Education,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]太原理工大学机械与运载工程学院,山西太原030024 [2]大连理工大学,精密与特种加工教育部重点实验室,辽宁大连116024

出　　处：《仪表技术与传感器》2020年第1期70-74,共5页Instrument Technique and Sensor

基　　金：国家973重点基础研究发展计划项目(2011CB013105);国家创新群体科学基金资助项目(51321004)

摘　　要：为实现微热管传热性能的准确评价,对其传热途径、热源的特性、功率控制等进行研究,建立了实验测试系统。首先,分析LED产热与结温变化规律,选择加热棒和陶瓷加热片作为阻性加热源。然后,利用源表对热源进行PID功率程控。最后,制作并校准特制热电偶,进行温度采集和数据处理。结果表明:加热棒、陶瓷加热片和大功率LED 3种热源的功率误差分别小于2、5、3 mW,特制热电偶误差小于1℃。相比直接通过恒定电压或电流控制功率的方法,PID功率控制方法的稳定性高、误差小;特制热电偶测温精度高、热惰性小。可为微热管的热性能评价提供可靠的测量基础。To implement the heat performance evaluation of micro heat pipe(MHP),heat transfer way,characteristics of heat sources and power control were analyzed,and then experimental test system was established.Firstly,heat rod and ceramic heater as resistive heating form were chosen based on the particularity of LED heat generation changing with junction temperature.Secondly,the program control structure of PID power for heat sources was designed.Finally,thermocouples after calibration were used to acquire temperature,and temperature data were processed.Results indicate that the power errors of three heat sources of heat rod,ceramic heater and LED are less than 2 mW,5 mW and 3 mW,respectively,and that the error of special thermocouples is less than 1℃.Compared to the method of controlling power only by setting constant the voltage or the current,PID power control has high stability and small error,as well as the high precision of special thermocouples,which can provide reliable data basis for the evaluation of heat performance of MHP.

关 键 词：微热管 热源控制 测试系统 温度采集 功率控制 热性能 

分 类 号：TP31[自动化与计算机技术—计算机软件与理论] TH811[自动化与计算机技术—计算机科学与技术]