基于快速激光恒温区的热电偶时间常数的测量  

Measurement method of thermocouple time constant based on fast laser constant temperature zone

作　　者：郝晓剑[1,2] 刘亭剑 HAO Xiaojian;LIU Tingjian(National Key Laboratory for Electronic Measurement Technology,North University of China,Taiyuan 030051,China;Key Laboratory of Instrumentation Science & Dynamic Measurement of Ministry of Education,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学电子测试技术国家重点实验室,太原030051 [2]中北大学仪器科学与动态测试教育部重点实验室,太原030051

出　　处：《激光技术》2019年第6期784-788,共5页Laser Technology

基　　金：国家自然科学基金资助项目(61473267);国防技术基础科研基金资助项目(JSJC2013408C009)

摘　　要：为了解决热电偶时间常数测试中阶跃温度问题,采用模糊控制算法反馈控制激光器的输出功率,设计了一种新的参量自适应模糊比例-积分-微分控制算法的闭环控制系统,并进行了理论分析和实验验证,测得某K型热电偶的时间常数为421.1ms.结果表明,该算法能有效缩短平衡时间和增强控温系统的抗干扰能力.该结果对热电偶的校准研究是有帮助的,具有一定的工程参考及应用价值.In order to solve the step temperature problem during test of thermocouple time constant, fuzzy control algorithm was used to feedback control the laser output power, a new parameter adaptive fuzzy proportion-integration-differentiation control algorithm was implemented and the hardware of closed-loop control system was analyzed. The experimental results show that, the time constant data of K-type thermocouple is 421.1ms. The algorithm can effectively shorten the balance time and enhance the anti-interference ability of the temperature control system. This research is helpful for the calibration research of thermocouples, and has certain engineering reference and application value.

关 键 词：测量与计量 时间常数测试 模糊控制 热电偶 模糊比例-积分-微分 闭环控制 

分 类 号：TN249[电子电信—物理电子学]