A Temperature Measuring Method for Explosive Temperature Field Based on High-speed Imaging Technology

doi:10.3969/j.issn.1000-1093.2021.03.021

Abstract

Abstract: A temperature measuring method for explosive temperature field based on high-speed imaging technology is proposed for the fast change, wide range, high temperature and difficult measurement of explosive temperature field. Based on the principle of radiation, a temperature measuring model of high-speed imaging system is deduced. The corresponding relationship between gray value of high-speed camera image and temperature of explosion is established, the temperature measuring range can be controlled by controlling the exposure time and transmittance of the high-speed imaging system. A high-speed imaging explosive temperature field measuring system was build, and the least square method was used to calibrate the system. The calibrated results show that the average error of the proposed method is 0.74% in the temperature range of 2 200-2 900 ℃ and 1.95% in the temperature range of 1 850- 2 350 ℃, which can meet the measuring requirements of the explosive temperature field. The proposed system and the infrared thermometer were used to measure the temperatures of 375 g, 750 g and 1 500 g explosive charges in experiment. The experimental results show that the maximum deviation of temperature measurement between the system and the infrared thermometer is 3.31%, which realizes the high response rate and high resolution measurement.

Key words: explosivetemperaturefield, high-speedimaging, hightemperaturemeasurement, highresolution

CLC Number:

TJ06

XU Renhan， ZHOU Yijie， DI Chang'an. A Temperature Measuring Method for Explosive Temperature Field Based on High-speed Imaging Technology[J]. Acta Armamentarii, 2021, 42(3): 640-647.

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