高精度双闭环负反馈激光器温度控制系统设计  

Design of High Precision Double Closed Loop Negative Feedback Laser Temperature Control System

作　　者：郭清华 GUO Qinghua(Chongqing Research Institute of China Coal Technology&Engineering Group Corp.,Chongqing 400039,China;National Key Lab for Gas Disaster Monitoring and Emergency Technology,Chongqing 400037,China)

机构地区：[1]中煤科工集团重庆研究院有限公司,重庆400039 [2]瓦斯灾害监控与应急技术国家重点实验室,重庆400037

出　　处：《电子器件》2023年第6期1720-1725,共6页Chinese Journal of Electron Devices

基　　金：天地科技股份有限公司科技创新创业资金专项项目(2021-TD-MS008);中煤科工集团重庆研究院重点项目(201003821)。

摘　　要：为保证激光甲烷传感器在煤矿等现场环境应用的测量精度和长期工作稳定性,首先提出了一种基于激光吸收峰和工作温度的高精度双闭环激光器温度控制系统设计方法,以提高DFB激光器温控系统的控制精度,减小温控系统对激光甲烷传感器测量值的影响。采用ADN8834集成TEC控制器芯片,设计了基于PI补偿网络的温度控制系统,并对温控系统进行仿真分析,得到了系统的频域、时域特性。为验证温控系统的精度和长期工作稳定性,激光甲烷传感器整机通过了(-20~60)℃高低温实验和60 d长期工作稳定性实验,激光器温控系统对吸收峰的控制误差减小到±1.8‰,为激光甲烷传感器在煤矿等工业现场的应用提供了技术支撑。In order to ensure the measurement accuracy and long-term working stability of the laser methane sensor in the field environ-ment such as coal mines,a high-precision double-closed-loop laser temperature control system design method based on laser absorption peak and operating temperature is proposed to improve the control accuracy of the DFB laser temperature control system and reduce the influence of the temperature control system on the measured value of the laser methane sensor.By using ADN8834 integrated TEC con-troller chip,a temperature control system based on PI compensation network is designed,the temperature control system is simulated and analyzed,and the frequency domain and time domain characteristics of the system are obtained.In order to verify the accuracy and long-term working stability of the temperature control system,the laser methane sensor is tested in the(-20~60)℃high and low temperature experiment and the 60-day long-term working stability experiment.The laser temperature control system has reduced the control error of the absorption peak,which is as small as±1.8‰,providing technical support for the application of laser methane sensors in industrial sites such as coal mines.

关 键 词：双闭环负反馈温控系统 DFB激光器 PI控制器 仿真 

分 类 号：O433[机械工程—光学工程]