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对于2 000 K以上的温度场,采用热像仪对温度场进行检测时,由于热像仪存在饱和问题,所以采用热像仪重建温度场这种测量的方法已不再适用。利用多组光学探头通过光纤远传,实现多光谱多通道数据的测量。在无需预先假设发射率与波长之间的模型关系基础上,通过迭代算法获得表面某些点的真温。通过布置成十字测温结构的多光谱方法实现涡轮增压锅炉多点温度的测量,构建了整个高温温度场的温度分布。结果表明:该方法用来测量高炉温度场分布可行、预测误差较小,可以为高温温度场的分析诊断提供参考。
For the temperature field above 2 000 K, when the temperature field is detected by the thermal imager, the method of reconstructing the temperature field by the thermal imager is no longer applicable due to the saturation problem of the thermal imager. Using multiple sets of optical probes through fiber optic remote transmission, to achieve multi-spectral multi-channel data measurement. Based on the model relationship between emissivity and wavelength without prior assumption, the true temperature at some point on the surface is obtained by an iterative algorithm. The temperature measurement of turbo boilers was carried out by multispectral method with cross-point temperature measurement structure, and the temperature distribution of the whole high-temperature temperature field was constructed. The results show that this method is feasible to measure the distribution of blast furnace temperature field and the prediction error is small, which can provide reference for the analysis and diagnosis of high temperature field.