不同非均匀性校正温度的红外测温技术

张晓龙 Zhang Xiao-long, 刘. L. Ying, 王. W. Jian, 周. Z. Hao, 孙. S. Qiang
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引用次数: 3

摘要

为了保证冷却型中波红外热像仪在不同环境温度下经非均匀性校正后的测温精度,分析了考虑非均匀性校正温度影响的中波红外热像仪标定模型。利用表面黑体在不同温度下对热像仪的非均匀性进行校正。通过对黑体目标的测温实验,得到了黑体亮度与灰度的关系。建立了目标温度的数学计算模型,分析了测温结果的误差。结果表明,在不同的校正温度下,热图像作为非均匀性校正辐射的灰度漂移可以线性处理,且与目标温度无关。当非均匀性较低时,热像仪测温误差小于0。22℃,大大降低了不同校正温度下非均匀性校正后的制冷中波红外热像仪测温误差。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Infrared thermometry technology with different nonuniformity correction temperatures
In order to keep high accuracy of temperature measurement of the cooled medium-wave infrared thermal imager after nonuniformity correction under different ambient temperatures,the calibration model of the medium-wave infrared thermal imager is analyzed with the consideration of the effect of the nonuniformity correction temperature. The nonuniformity of thermal imager is corrected using surface blackbody under different temperatures. The relationship between the gray and blackbody radiance is obtained by thermometry experiment of blackbody target. The mathematical calculation model of target temperature is established and the error of thermometry result is analyzed. The results show that the drift of gray of thermal image as nonuniformity correction radiance under different correction temperatures can be treated linearly,and is independent on the target temperature. When the nonuniformity is low,the temperature measurement error of the thermal imager is less than 0. 22 ℃,which greatly reduces the temperature measurement error of the cooled medium-wave infrared thermal imager after nonuniformity correction under different correction temperatures.
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