【摘要】：轉(zhuǎn)爐煉鋼終點(diǎn)溫度預(yù)測的自動化是煉鋼工藝中的一個難題。目前,只能通過爐氣分析法或者人工經(jīng)驗(yàn)進(jìn)行預(yù)測。但是爐氣分析法價格昂貴且維護(hù)成本高,而人工經(jīng)驗(yàn)命中率低。由于光輻射測溫的非接觸式測量性質(zhì),因此易于維護(hù)。然而由于爐口火焰的非黑體性質(zhì),黑體輻射公式不能直接使用。針對上述問題,基于普朗克公式,利用維恩近似,引入雙波長測溫公式,進(jìn)行色溫公式的推導(dǎo)�；谠撋珳毓�,結(jié)合光纖光譜儀采集的光譜數(shù)據(jù),對光譜光強(qiáng)進(jìn)行損耗形式假設(shè)以建立模型。利用類比實(shí)驗(yàn)推導(dǎo)出相加項的表達(dá)形式,結(jié)合一段光譜數(shù)據(jù)求解溫度,從而建立一種新型的用于終點(diǎn)溫度判斷的模型。在模型應(yīng)用過程中,考慮到生產(chǎn)環(huán)境復(fù)雜,光譜數(shù)據(jù)以及溫度數(shù)據(jù)中存在噪聲,因此使用傅里葉濾波以及連續(xù)平滑濾波方法在空間和時間角度對數(shù)據(jù)進(jìn)行去噪聲處理,使溫度結(jié)果更準(zhǔn)確,從而對光譜測溫模型進(jìn)行修正。利用望遠(yuǎn)系統(tǒng)、光纖光譜儀、光纖以及計算機(jī)開發(fā)生產(chǎn)環(huán)境中使用的平臺,使用C、MATLAB以及L abView編寫現(xiàn)場以及仿真環(huán)境下的軟件程序,將修正之后的光譜測溫模型應(yīng)用到該系統(tǒng)中。該測溫系統(tǒng)經(jīng)現(xiàn)場測試,±20℃內(nèi)的命中率在90%以上,完全滿足實(shí)際生產(chǎn)要求,對生產(chǎn)效率的提高具有重要的意義。
[Abstract]:The automation of terminal temperature prediction in converter steelmaking is a difficult problem in steelmaking process. At present, only through furnace gas analysis or artificial experience to predict. But the furnace gas analysis method is expensive and the maintenance cost is high, and the hit rate of artificial experience is low. Because of the non-contact measurement property of light radiation temperature measurement, it is easy to maintain. However, the blackbody radiation formula can not be used directly because of the non-blackbody nature of the furnace mouth flame. In order to solve the above problems, based on Planck formula, the formula of color temperature is derived by introducing the formula of two-wavelength temperature measurement by using the Wynn approximation. Based on the formula of color temperature and the spectral data collected by optical fiber spectrometer, the loss form of spectral intensity is assumed to establish the model. In this paper, the expression of the additive term is deduced by analogy experiment, and the temperature is solved by a section of spectral data, thus a new model for judging the terminal temperature is established. In the application of the model, considering the complexity of the production environment and the noise in the spectral data and the temperature data, the method of Fourier filter and continuous smoothing filter is used to process the data in spatial and time angle. The model of spectral temperature measurement is modified by making the temperature result more accurate. The modified spectral temperature measurement model is applied to the system by using the terrace of telescope system, optical fiber spectrometer, optical fiber and computer development and production environment, and the software program of field and simulation environment is compiled by using C _ (C) MATLAB and L abView. The field test shows that the hit ratio of the temperature measuring system is above 90% within 鹵20 鈩，

本文編號：2200715