多形态火焰高度的小区间光强分布检测

Height Detection of Polymorphic Flame Based on Light Intensity Distribution

火焰高度是易燃化学品常规检测参数,其定量检测方法多采用人工比对或基于机器视觉的图像检测。前者受主观影响、危险性高,后者系统复杂、难以适应广谱多形态火焰,因此,提出了一种广谱火焰高度检测方法。该方法采用光热双传感器阵列配合梳状遮光装置划分火焰高度,消除相邻传感器非水平方向入射光线的干扰,并通过小区间光强分布计算进一步提高检测准确性。试验结果表明,该方法可实现广谱多形态火焰高度的准确、非接触、低成本检测,易于工程化实现。

The height of flame is one of the conventional detection parameters for flammable chemicals, mostly, its quantitative detection is using artificial inter-comparison or the image detection based on machine vision. The former one is affected subjectively and in high risk, while the latter one is complicated in system and difficult to adapt broad spectrum polymorphic flame. Thus, the detection technology suitable for broad spectrum flame height is proposed, of which, the photothermal dual sensor array is used to coordinate the comb shape hood for dividing flame height and eliminating the interference of incident lights of adjacent sensor from non-horizontal direction. Through calculating the short interregional＇ light intensity, the detection accuracy is enhanced in further. The experimental results show that this method realizes the quantitative, non-contact, low cost detection for flame height of broad spectrum polymorphic flame and is easy to be engineered.