基于红外热像的钢水温度测量

发布时间：2018-01-18 13:12

  本文关键词：基于红外热像的钢水温度测量　出处：《华北理工大学》2015年硕士论文　论文类型：学位论文

  更多相关文章： 红外热像 比色测温 小波分析 伪彩色

【摘要】：目前在工业生产中涉及到钢铁冶炼的行业众多,采用怎样的方法能对钢水温度做出准确的测量是不断探索和研究的热点理论。目前钢铁冶炼过程中大多采用传统的热电偶作为钢水温度的测量工具。为了探索新型有效的测温方法,根据热辐射原理,设计了基于红外热像的温度检测系统。以热辐射定律为理论基础,以比色测温理论为技术手段,研究红外热像的钢水温度测量。测量误差控制在1%。为了使钢水温度测量误差更小,需要进行比色测温波段的选择,选取合适的红外滤光片,为红外热像测温系统提供更加精确的数据。由红外CCD相机采集钢水的图像,把采集到的图像进行信号处理传输给计算机,经过计算机的特征信号提取,把提取的特征数据经过分析计算,最后达到准确测温的目的。图像处理方面,采用Harr小波函数来对图像分析,进行了灰度化、分解、去噪、重构等处理步骤。经小波分析后的图像去除了大部分没用的干扰因素,使得需提取的特征量更为突出,为测温系统的数据提取提供了可靠保障。经实验证明,红外热像测温系统能够以非接触式的方法实现对炉内钢水温度的准确测量并真实再现熔池表面温度场情况,达到了测量精度和设计要求,弥补了传统热电偶测温的不足,具有较强的实用性和推广价值。
[Abstract]:At present, there are many industries involved in iron and steel smelting in industrial production. How to measure the temperature of molten steel accurately is a hot topic in the research. At present, the traditional thermocouple is used as the measuring tool of molten steel temperature in order to explore new ways. Type A effective temperature measurement method. According to the principle of thermal radiation, the temperature detection system based on infrared thermal image is designed, which is based on the theory of thermal radiation law and colorimetric temperature measurement theory as a technical means. The temperature measurement of molten steel in infrared thermal image is studied. The measuring error is controlled at 1. In order to make the temperature measurement error of molten steel smaller, it is necessary to select the band of colorimetric temperature measurement and select the appropriate infrared filter. The infrared thermal image temperature measurement system provides more accurate data. Infrared CCD camera is used to collect the image of molten steel, and the collected image is processed and transmitted to the computer, and the characteristic signal is extracted by the computer. The extracted feature data is analyzed and calculated, finally the purpose of accurate temperature measurement is achieved. In image processing, Harr wavelet function is used to analyze the image, which is grayscale, decomposed and de-noised. Reconstruction and other processing steps. The image after wavelet analysis removed most of the useless interference factors, so that the feature quantity to be extracted is more prominent, which provides a reliable guarantee for the data extraction of the temperature measurement system. The infrared thermal image temperature measurement system can accurately measure the molten steel temperature in the furnace by non-contact method and reproduce the surface temperature field of the molten pool. The measurement accuracy and design requirements are achieved. It makes up for the deficiency of traditional thermocouple temperature measurement, and has strong practicability and popularization value.
【学位授予单位】：华北理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TF703;TN219
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本文编号：1441091