可调谐激光吸收光谱应用于气体二维浓度分布重建研究  

Two-dimensional reconstruction for gas concentration with tunable diode laser absorption spectroscopy

作　　者：邢大伟[1] 王飞[1] 姜治深[1] 王超[1] 张海丹[1] 严建华[1] 岑可法[1] 

机构地区：[1]浙江大学能源清洁利用国家重点实验室,杭州310027

出　　处：《光学技术》2013年第3期241-246,共6页Optical Technique

基　　金：国家重点基础研究发展计划(973计划)(2009CB219802);浙江省自然科学基金项目(R1100395);"高等学校学科创新引智计划"资助项目(B08026)

摘　　要：基于可调谐半导体激光吸收光谱技术(TDLAS),设计了气体浓度二维分布重建系统。将单路可调谐激光分为24路,交叉穿过目标区域,得到24组直接吸收信号(DA),并采用代数迭代法(ART)计算得到目标区域气体浓度二维分布。搭建了二维气体浓度分布测量试验台,利用中心波长在1.653μm的DFB激光器作为光源,选取HITRAN数据库CH4的2v3带R(3)线作为计算谱线进行数值模拟和试验验证,并对重建结果进行了误差分析。结果表明重建系统能很好的实现气体二维浓度分布重建测量。A gas concentration reconstruction system is designed based on tunable diode absorption spectroscopy （TDLAS）. A single diode laser is split into 24 beams crossing the target region. The 24 direct absorption （DA） signals are used to calculate the two-dimensional gas concentration distributions in the target region via algebraic reconstruction technique （ART）. A test stage is established and a DFB laser with the central wavelength 1. 653μm is chosen as the light source. The absorption transition R（3） in the second overtone band of methane is selected from a HITRAN database. Based on these considerations, a numerical simulation and a verifying test are conducted as well as the error analysis. The results show relatively great fidelity of the two-dimensional gas concentration distribution reconstruction.

关 键 词：光学测量 可调谐激光吸收光谱 气体二维浓度 代数迭代重建 

分 类 号：TK314[动力工程及工程热物理—热能工程]