光谱学与光谱分析 |
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Development of Multi-Spectral Thermometer for Explosion Flame True Temperature Measurement——Field Experiments and Measurement Accuracy Analysis |
SUN Kun1, 2, SUN Xiao-gang3, YU Xiao-yang1, SUN Xiao-ming1 |
1. The Higher Educational Key Laboratory for Measuring & Control Technology and Instrumentations of Heilongjiang Province, Harbin University of Science and Technology, Harbin 150080, China 2. Key Laboratory of Engineering Dielectric and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, China 3. Instrument Science and Technology, Harbin Institute of Technology, Harbin 150001, China |
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Abstract 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.
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Received: 2013-01-29
Accepted: 2013-03-18
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Corresponding Authors:
SUN Kun
E-mail: sunkun1982@126.com
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