TDLAS系统动态光强跟踪检测电路研制  

Development of dynamic light intensity tracking detection circuit for TDLAS system

作　　者：王彪[1] 俞泳波 张瑞 程林祥 戴童欣 连厚泉 WANG Biao;YU Yongbo;ZHANG Rui;CHENG Linxiang;DAI Tongxin;LIAN Houquan(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of Science and Technology of China,Beijing 100049,China;University of Chinese Academy of Sciences,Hefei 230026,China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所,长春130033 [2]中国科学技术大学,北京100049 [3]中国科学院大学,合肥230026

出　　处：《激光杂志》2022年第6期9-12,共4页Laser Journal

基　　金：国家重大科研仪器设备研制项目(No.61727822);白求恩医学工程与仪器中心项目(No.BQEGCZX2021023)。

摘　　要：TDLAS系统利用气体对特定波长的激光吸收的原理进行气体检测,激光的光强稳定性对系统的检测精度和稳定度有着重要的影响。针对TDLAS系统激光器光强的变化,本文研制了动态光强跟踪检测电路。电路采用STM32H7B0作为主控制器,设计了低噪声的高速前置放大器,并使用压控放大器AD8367调整电路的增益。主控芯片实时检测光强变化情况,并控制放大器调整检测电路的增益,实现动态光强跟踪。经过测试,该检测电路可以根据激光器光强变化实时的调节增益,稳定的输出电压信号,消除了激光器光强的变化对TDLAS检测系统的影响。The TDLAS system uses the principle of gas absorption of specific wavelengths of laser light to detect gas. The stability of the light intensity of the laser has an important impact on the detection accuracy and stability of the system. Aiming at the change of laser light intensity of TDLAS system, a dynamic light intensity tracking detection circuit is developed in this paper. The circuit uses STM32 H7 B0 as the main controller, designs a low-noise high-speed preamplifier, and uses the voltage-controlled amplifier AD8367 to adjust the gain of the circuit. The main control chip detects changes in light intensity in real time, and controls the amplifier to adjust the gain of the detection circuit to achieve dynamic light intensity tracking. After testing, the detection circuit can adjust the gain in real time according to the change of the laser light intensity, and output the voltage signal stably, which eliminates the influence of the change of the laser light intensity on the TDLAS detection system.

关 键 词：TDLAS 光电探测 光强跟踪 STM32H7B0 

分 类 号：TN271.5[电子电信—物理电子学]