被测表面失焦对红外测温的影响研究

发布时间：2018-01-22 12:29

本文关键词： 红外技术温度测量反向蒙特卡洛法测温误差　出处：《锅炉技术》2016年06期 　论文类型：期刊论文

【摘要】：由于探测位置安装的限制,被测表面会部分或者全部失焦,这将对红外测温产生影响,利用反向蒙特卡洛法对物平面的平行离焦和旋转失焦两种情况进行了模拟,并且分析了相机分辨率和壁温分布对测温的影响,得出当物平面平行离焦时,随着离焦距离的增大,红外测温的误差也越大,当物平面旋转失焦时,随着旋转角度的增大,红外测温的误差也越大,随着CCD相机分辨率的增加,离焦对红外测温的影响越来越小,但分辨率提高到一定程度后,分辨率的影响几乎可以忽略,此外温度分布也对红外测温也有影响,温度变化越剧烈,离焦时测温误差越大。
[Abstract]:Due to the limited installation of the detection position, the measured surface will be partially or completely defocused, which will have an impact on the infrared temperature measurement. The parallel defocusing and rotating defocusing of object plane are simulated by reverse Monte Carlo method, and the effects of camera resolution and wall temperature distribution on temperature measurement are analyzed. With the increase of defocus distance, the larger the infrared temperature measurement error is, the greater the infrared temperature measurement error is when the object plane rotates out of focus and the rotation angle increases, and the resolution of the CCD camera increases. The effect of defocusing on infrared temperature measurement is becoming smaller and smaller, but the resolution can be neglected when the resolution is improved to a certain extent. In addition, the temperature distribution also has an effect on infrared temperature measurement, and the temperature change is more severe. The larger the temperature measurement error is during defocusing.
【作者单位】：广东电网有限责任公司电力科学研究院;东南大学材料科学与工程学院;东南大学能源热转换及其过程测控教育部重点实验室;
【分类号】：TN219
【正文快照】： 0前言温度的检测和控制在电力系统、石化、冶金等行业中受到高度的重视,它关系着系统的安全、产品的质量以及生产的效率[1]。红外测温技术由于测温范围理论上无上下限、不改变被测物体温度、测温响应时间短以及可以测量物料表面的温度分布等优点,在生产过程监测、产品质量控制

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