本文關(guān)鍵詞：基于紅外熱像的鋼水溫度測(cè)量　出處：《華北理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 紅外熱像 比色測(cè)溫 小波分析 偽彩色

【摘要】：目前在工業(yè)生產(chǎn)中涉及到鋼鐵冶煉的行業(yè)眾多,采用怎樣的方法能對(duì)鋼水溫度做出準(zhǔn)確的測(cè)量是不斷探索和研究的熱點(diǎn)理論。目前鋼鐵冶煉過(guò)程中大多采用傳統(tǒng)的熱電偶作為鋼水溫度的測(cè)量工具。為了探索新型有效的測(cè)溫方法,根據(jù)熱輻射原理,設(shè)計(jì)了基于紅外熱像的溫度檢測(cè)系統(tǒng)。以熱輻射定律為理論基礎(chǔ),以比色測(cè)溫理論為技術(shù)手段,研究紅外熱像的鋼水溫度測(cè)量。測(cè)量誤差控制在1%。為了使鋼水溫度測(cè)量誤差更小,需要進(jìn)行比色測(cè)溫波段的選擇,選取合適的紅外濾光片,為紅外熱像測(cè)溫系統(tǒng)提供更加精確的數(shù)據(jù)。由紅外CCD相機(jī)采集鋼水的圖像,把采集到的圖像進(jìn)行信號(hào)處理傳輸給計(jì)算機(jī),經(jīng)過(guò)計(jì)算機(jī)的特征信號(hào)提取,把提取的特征數(shù)據(jù)經(jīng)過(guò)分析計(jì)算,最后達(dá)到準(zhǔn)確測(cè)溫的目的。圖像處理方面,采用Harr小波函數(shù)來(lái)對(duì)圖像分析,進(jìn)行了灰度化、分解、去噪、重構(gòu)等處理步驟。經(jīng)小波分析后的圖像去除了大部分沒(méi)用的干擾因素,使得需提取的特征量更為突出,為測(cè)溫系統(tǒng)的數(shù)據(jù)提取提供了可靠保障。經(jīng)實(shí)驗(yàn)證明,紅外熱像測(cè)溫系統(tǒng)能夠以非接觸式的方法實(shí)現(xiàn)對(duì)爐內(nèi)鋼水溫度的準(zhǔn)確測(cè)量并真實(shí)再現(xiàn)熔池表面溫度場(chǎng)情況,達(dá)到了測(cè)量精度和設(shè)計(jì)要求,彌補(bǔ)了傳統(tǒng)熱電偶測(cè)溫的不足,具有較強(qiáng)的實(shí)用性和推廣價(jià)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.
【學(xué)位授予單位】：華北理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TF703;TN219
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本文編號(hào)：1441091