摘要
在我国碳达峰、碳中和的政策背景下,对植被碳吸收过程中硫化碳(COS)和二氧化碳(CO_(2))进行高精度长时间在线监测具有重要的社会意义和市场价值。针对植被碳吸收气体可调谐半导体激光吸收光谱术(TDLAS)检测需要,基于TDLAS长程吸收池设计了一种用于植被碳吸收气体TDLAS检测的气压控制系统。该系统采用STM32作为主控,使用气压传感器采集长程吸收池内实际气压,气体比例阀和真空气泵作为执行器件,在实现长程吸收池内气体置换的同时保证低压稳定,同时采用缓冲气室和隔离阀以减小真空气泵的冲击造成的干扰。经过气体梯度控制测试和野外长时间稳定性测试后,该系统工作稳定、控制精度高、可适应野外环境,可以满足植被碳吸收气体TDLAS检测的需求,同样适用于其他基于长程吸收池的检测系统中。
Under the policy background of carbon peaking and carbon neutralization in China,it is of great social significance and market value to carry out high-precision and long-time on-line monitoring of COS and COin the process of vegetation carbon absorption.According to the needs of TDLAS detection of vegetation carbon absorption gas,a pressure control system for TDLAS detection of vegetation carbon absorption gas is designed based on TDLAS long-range absorption tank.The system uses STM32 as the main control,uses the air pressure sensor to collect the actual air pressure in the long-range absorption tank,and uses the gas proportional valve and vacuum air pump as the actuator to realize the gas replacement in the long-range absorption tank and ensure the stability of low pressure at the same time.After the gas gradient control test and field long-term stability test,the system works stably,has high control accuracy,can adapt to the field environment,can meet the needs of TDLAS detection of vegetation carbon absorption gas.The system is also suitable for other detection systems based on long-range absorption tank.
作者
王震宇
汪磊
朱灵
朱向冰
刘崎
Wang Zhenyu;Wang Lei;Zhu Ling;Zhu Xiangbing;Liu Qi(School of Physics and Electronic Information,Anhui Normal University,Wuhu,Anhui 241000,China;Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei,Anhui 230031,China)
出处
《应用激光》
CSCD
北大核心
2022年第8期109-115,共7页
Applied Laser
基金
中国科学院科研仪器设备研制项目(YE07G061251)。
