基于可调谐半导体激光吸收光谱(Tunable Diode Laser Absorption Spectroscopy, TDLAS)技术及修正型代数迭代算法(Algebraic Reconstruction Technique, ART)，选择频率为7 153.7 cm^-1 和7 154.3 cm^-1 的H₂O 吸收线作为测温谱线，测量了CH₄/Air 预混平面火焰炉燃烧场温度和H₂O 气浓度分布。仿真采用1 000 pixels×1 000 pixels 个像素点描述方形模型区域，假设40 条光束从两个方向正交通过重建区域，通过引入初始分布并经修正型ART 算法计算和三次多项式插值处理，温度场重建偏差在4.5%以内，H₂O 气浓度场重建偏差在4%以内。实验采用导轨和转台实现探测光对稳态燃烧场两个方向上的平行扫描，共获取24 路光束吸收信号，经修正型ART 算法重建和三次多项式插值处理得到整个火焰炉燃烧区域的温度场和H₂O 气浓度场分布。将温度场重建结果与热电偶的测量结果进行对比，表明该方法能够有效实现燃烧场温度二维重建。

7 153.7cm^-1 and 7 154.3cm^-1 absorption light spectrums of H₂O vapor were chosen to measure temperature distributions and H₂O vapor concentration distributions of the combustion region of CH4/Air flat flame furnace based on Tunable Diode Absorption Spectroscopy (TDLAS) and modified Algebraic Reconstruction Technique (ART). In the numerical simulation, combustion region was described by 1 000 pixels×1 000 pixels. There were 40 laser rays cross the combustion region in orthogonal two directions. By introducing the initial distribution, we found the temperature field reconstruction relative error was less than 4.5% and H₂O vapor concentration field reconstruction relative error was less than 4% based on modified ART algorithm and cubic polynomial interpolation processing. In the experiment, 24 laser rays were used to scan the target region of CH₄/Air flat flame furnace in orthogonal two directions with rotary table and slide way. Temperature field and H₂O vapor concentration field were obtained based on modified ART algorithm and cubic polynomial interpolation. A comparison of temperature reconstruction result and thermo couple result indicates the method is effective to achieve temperature field reconstruction of the combustion region.