多点协同温控系统电路设计  

Circuit design of multi-point cooperative temperature control system

作　　者：范博强 张玉钧[1] 刘国华[1,2] 尤坤[1] 张恺[1,2] 何莹[1] 唐七星[1,2] Fan Boqiang;Zhang Yujun;Liu Guohua;You Kun;Zhang Kai;He Ying;Tang Qixing(Key Laboratory of Environmental Optics ~ Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China;University of Science and Technology of China, Hefei 230026, China)

机构地区：[1]中国科学院环境光学与技术重点实验室、安徽光学精密机械研究所,合肥230031 [2]中国科学技术大学,合肥230026

出　　处：《电子测量技术》2018年第5期95-101,共7页Electronic Measurement Technology

基　　金：国家重点研发计划(2016YFC0201003);省科技重大专项(15czz04124)项目资助

摘　　要：在使用火焰离子化检测仪（FID）分离测量机动车尾气总碳氢含量过程中,进样口、柱温箱以及离子室的温度直接影响色谱峰的形状和分布,因此温度控制系统是FID中的重要组成部分。针对火焰离子化检测仪中进样口、柱温箱和离子室的8个点位不同控温范围的需求,提出了基于PID算法的多点协同温控方案,设计了测温电路、升温电路以及控制8个控温点位协同工作的程序,实现了火焰离子化检测仪的温控智能化。火焰离子化检测仪的测试实验结果表明,该温控系统稳定性高,控制精度在±0.1℃范围内,能保证火焰化离子检测仪高稳定性工作。In the process of separation measuring the total hydrocarbon of motor vehicle exhaust by the flame ionization detector（flame ionization detector,FID）,the temperature of the inlet,column oven,and ion chamber directly affect the shape and distribution of the chromatography peak.Therefore,the temperature control system is an important part of the FID.Aiming at the requirement of different temperature control range of eight points at the inlet,column oven and ion chamber in the flame ionization detector,a multi-point cooperative temperature control scheme based on PID algorithm is proposed,and design the temperature measurement circuit,heating circuit and the procedures of the eight temperature points to control cooperatively,achieving the flame ionization detector temperature control intelligent.The test results of flame ionization detector show that the temperature control system has high stability and the control accuracy is in the range of±0.1℃,which can guarantee the high stability of the flame ionization detector.

关 键 词：火焰离子化检测仪 总碳氢 多点协同温控 PID 

分 类 号：TN248.4[电子电信—物理电子学]