基于红外热图像灰度修正的辐射测温

发布时间：2018-01-02 09:06

本文关键词：基于红外热图像灰度修正的辐射测温　出处：《激光与红外》2016年01期 　论文类型：期刊论文

【摘要】：基于红外热像仪的测温精度依赖于大气温度、相对湿度、大气透射率、翻转表像温度等参数的测量精度。为了减少这种依赖性和提高测量精度,提出了一种基于红外热图像灰度修正的辐射测温方法。首先基于高精度面源黑体建立了红外热图像灰度修正模型,然后通过灰度修正模型对实测的目标灰度进行修正,最后通过基于加权最小二乘法建立的热像仪辐射定标模型等计算出修正后的目标亮度和温度。在实验室环境下,分别基于红外热像灰度修正辐射测温法和直接用热像仪测温对目标进行了测量。结果表明,在实验室环境下,前者的平均测量精度较后者提高了3.6%。该方法对实验室环境下红外测温有较好的实用价值,对外场红外测温也有一定的借鉴意义。
[Abstract]:Temperature measurement accuracy of the infrared thermal imager is dependent on the atmospheric temperature, based on the relative humidity, atmospheric transmittance, turning table precision like temperature and other parameters. In order to reduce this dependence and improve the measurement accuracy, a temperature measurement of radiation of infrared image based on gray level correction method. The high accuracy blackbody was established based on the infrared thermal image correction model, and then through the gray level correction of the measured target gray model, finally through the establishment of thermal imager based on weighted least square method of radiometric calibration model to calculate the corrected target brightness and temperature. In the laboratory environment, respectively, infrared gray radiation thermometry and direct thermal imager the target was measured based on temperature measurement. The results show that in the laboratory environment, the average accuracy of the former increased 3.6%. the method of experimental chamber ring than the latter The infrared temperature measurement under the environment has a good practical value, and it also has some reference significance for the infrared temperature measurement in the field.

【作者单位】：沈阳大学机械工程学院;中国矿业大学机电工程学院;
【基金】：中航创新基金项目(No.cxy2012SH18) 沈阳市科技创新团队项目(No.src201204)资助
【分类号】：TN219;TP391.41
【正文快照】： 1引言在实验室环境下利用红外设备测量目标辐射温度时,环境辐射、目标反射环境辐射、路径辐射等因素都会对测量结果造成一定的影响[1]。一般来说,实验室环境辐射强度、路径辐射强度都比较小,大气透射率接近于1,但近距离辐射测温时,辐射路程对测量精度的影响却较为明显,对于不

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