摘要
基于可调谐半导体激光光谱(TDLAS)技术的痕量CO浓度检测系统由于受诸多环境因素的干扰,检测精度下降。其中温度波动会影响光电探测器的响应度和暗电流,造成探测器输出信号的漂移,进而影响CO检测精度。针对上述问题,设计一种宽温度范围的高精度恒温控制系统。分别从响应度和暗电流方面分析温度对光电探测器输出信号的影响,在此基础上,利用继电反馈自整定比例-积分-微分调节算法、双路电压采集和改进综合卡尔曼滤波算法设计一种高精度恒温控制驱动模块。实验结果表明,设计的高精度恒温控制系统在高、低温环境下均可以实现±0.005℃的温控精度。
The trace CO concentration detection system based on tunable diode laser absorption spectroscopy(TDLAS)technology presents low detection accuracy owing to interference from various environmental factors.Temperature fluctuations affect the responsivity and dark current of the photodetector,thus causing a drift in the detector’s output signal,which consequently affects the accuracy of CO detection.Hence,a high-precision constant-temperature control system with a wide temperature range is designed in this study.The effect of temperature on the photodetector’s output signal is analyzed based on both the responsivity and dark current of the photodetector.Subsequently,a high-precision constant-temperature control drive module is designed using a relay feedback self-tuning proportional-integral-derivative adjustment algorithm,dual-channel voltage acquisition,and an improved comprehensive Kalman filter algorithm.Experimental results show that this high-precision constant-temperature control system can achieve a temperature-control accuracy of±0.005°C in both high-and low-temperature environments.
作者
冯佳丽
魏志鹏
孙礼朋
唐吉龙
贾慧民
包启航
Feng Jiali;Wei Zhipeng;Sun Lipeng;Tang Jilong;Jia Huimin;Bao Qihang(State Key Laboratory of High Power Semiconductor Laser,Changchun University of Science and Technology,Jilin 130022,Changchun,China;Zhongshan Institute,Changchun University of Science and Technology,Zhongshan 528437,Guangdong,China;Heguang Precision Electronics(Chongqing)Co.,Ltd.,Chongqing 400052,China)
出处
《激光与光电子学进展》
北大核心
2025年第7期270-277,共8页
Laser & Optoelectronics Progress
基金
国家自然科学基金(62434001,62027820)
吉林省自然科学基金(SKL202402019,20230101352JC)
高等学校学科创新引智计划(D17017)。
关键词
光电探测器
温度控制
继电反馈自整定比例-积分-微分调节
改进综合卡尔曼滤波
photoelectric detector
temperature control
relay feedback self-tuning proportional integral derivative regulation
improved comprehensive Kalman filter
