研制了可用于大型爆炸现场的、 测量爆炸火焰真温的多光谱温度计(量程为800~3 500 ℃, 波长范围为0.6~1.1 μm)。 测量原理进一步改进, 加入亮温逼近法解决了二次测量法初值选取困难的问题, 并应用此高温计在空旷场地对3 kg TNT炸药爆炸的全过程进行测量。 通过实验结果的分析可知, 此高温计可以测量爆炸火焰真温变化全过程, 对波阵面瞬时温度与燃烧火球温度的测量均具有很好的效果。 同时, 分析了影响此高温计测量精度的各个因素, 得出目前制约多光谱高温计测量精度提高的主要因素仍然为真温算法及标定方法的误差, 这为今后研制高精度高温计明确了方向。

In the present article, the measurement principle of a multi-target multi-spectral thermometer developed previously is improved in that the brightness temperature approximation method is adopted to overcome the second measurement method initial value selection difficulty. The thermometer is used to measure the explosion true temperature of 3KG TNT explosive in open fields. The experimental results show that this pyrometer can measure changes in the explosion flame true temperature in the whole process, and functions well in the wavefront instantaneous temperature measurement and burning fireball temperature measurement. Finally, through the analysis of the factors which affect the thermometer measurement accuracy, it was concluded that the main error sources restricting the measurement accuracy improvement are still the true temperature algorithm error and the calibration method error. The analysis result has provided the direction for the high-precision thermometer development.