论文部分内容阅读
传统的比色测温法通常利用可见光和近红外波段,对距离较近的高温目标具有较高的测量精度,而对距离较远的中低温目标无法精确测量。针对传统比色方法适用局限性,提出考虑大气和环境影响的红外比色测温方法,建立基于中波红外相机的比色测温实验系统。首先使用标准黑体进行中波红外相机和比色系统单波段定标;然后推导加入环境辐射参数的比色测量模型,进而建立新的目标辐射亮度比值与目标温度间的函数关系;最后,进行了实验室内自制灰体目标温度测量实验,验证了提出方法的可行性。实验表明:在实验温度范围内,温度绝对误差和相对误差分别小于4℃和6.7%,目标辐射亮度测量精度高于10%,考虑大气与环境影响的比色测温方法可实现中低温目标温度精确测量。
The traditional colorimetric thermometry usually uses the visible and near infrared bands, which have higher accuracy for high-temperature targets at close distances and can not accurately measure the low-temperature targets at far distances. Aiming at the limitations of the traditional colorimetric methods, an infrared colorimetric temperature measurement method considering atmospheric and environmental impact is proposed and a colorimetric temperature measurement experiment system based on the medium-wave infrared camera is established. Firstly, the standard blackbody is used to calibrate the single wavelength band of the medium-wave infrared camera and the colorimetric system. Then the colorimetric measurement model which incorporates the environmental radiation parameters is deduced to establish a new target radiation brightness ratio as a function of the target temperature. Finally, The experiment of self-made gray body temperature measurement in the laboratory verified the feasibility of the proposed method. The experimental results show that the absolute temperature error and the relative error are less than 4 ℃ and 6.7% respectively in the experimental temperature range and the target radiance measurement accuracy is higher than 10%. The colorimetric temperature measurement method, which considers the influence of the atmosphere and the environment, Accurate measurement.