發(fā)布時間：2018-04-12 01:00

  本文選題：廢金屬 + 分選系統(tǒng)��； 參考：《南京航空航天大學(xué)》2015年碩士論文

【摘要】：隨著我國工業(yè)的快速發(fā)展,汽車、建材、家電和機(jī)械等產(chǎn)品更新?lián)Q代速率加快,隨之產(chǎn)生的廢金屬量迅猛增加,廢金屬資源的回收與再利用技術(shù)研究已成為金屬工業(yè)可持續(xù)發(fā)展的重要研究領(lǐng)域。裝備整體水平落后等問題嚴(yán)重制約著我國廢金屬回收行業(yè)的發(fā)展。為了提升我國廢金屬分選回收設(shè)備的技術(shù)水平,提高金屬回收效率,節(jié)約金屬資源,本文針對雙能X射線透射分選技術(shù)進(jìn)行研究。(1)基于雙能X射線透射分析理論,研究了利用R值曲線法和Bayes決策函數(shù)判定金屬物料元素的方法。(2)在分析雙能X射線透射信號及其噪聲的基礎(chǔ)上,針對探測隨機(jī)噪聲的高斯分布特性、孤立噪聲的無規(guī)律性和探測板之間的串?dāng)_噪聲只在固定通道出現(xiàn)等特點(diǎn),提出一種改進(jìn)的鄰域相關(guān)自適應(yīng)中值濾波法,以滿足濾波的準(zhǔn)確性與快速性。(3)在Visual Studio 2012環(huán)境下開發(fā)了分選系統(tǒng)的控制處理程序,包括:X射線源、雙能線陣列探測器和物料輸運(yùn)裝置的控制程序,信號采集與處理程序等。(4)設(shè)計基于雙能X射線透射技術(shù)的廢金屬分選系統(tǒng)的總體結(jié)構(gòu),采用Spellman X射線源、Sens-Tech雙能線陣列探測器和物料輸運(yùn)裝置等搭建廢金屬分選系統(tǒng)樣機(jī)。(5)通過鋁塊的雙能X射線透射信號濾波實(shí)驗(yàn),驗(yàn)證了所提出的雙能X射線透射信號的濾波算法的有效性。通過分析銅、鋁階梯試件的雙能X射線透射信號曲線以及R值,驗(yàn)證了所提出的基于雙能X射線透射分析技術(shù)的金屬物料識別方法的有效性。
[Abstract]:With the rapid development of China's industry, the rate of replacement of automobiles, building materials, household appliances and machinery has been accelerated, and the amount of scrap metal produced has increased rapidly.The research on recycling and reuse of scrap metal resources has become an important research field in the sustainable development of metal industry.The backward level of equipment seriously restricts the development of scrap metal recovery industry in China.In order to improve the technical level of waste metal separation and recovery equipment in China, to improve the efficiency of metal recovery and to save metal resources, this paper studies dual-energy X-ray transmission separation technology, which is based on the theory of dual-energy X-ray transmission analysis.Based on the analysis of dual energy X ray transmission signal and its noise, the method of determining metal material elements by using R value curve method and Bayes decision function is studied. The Gao Si distribution characteristic of detecting random noise is studied.In this paper, an improved neighborhood correlation adaptive median filtering method is proposed for isolated noise and crosstalk noise between detection boards, which only occur in fixed channels.In order to satisfy the accuracy and rapidity of filtering, the control program of the sorting system is developed under Visual Studio 2012 environment, including the control program of the X ray source, the dual energy line array detector and the material transportation device.The general structure of waste metal sorting system based on dual-energy X-ray transmission technology is designed.The waste metal sorting system prototype is constructed by using Spellman X-ray source sensor-Tech dual energy line array detector and material transport device. The experiment is carried out through aluminum block dual energy X ray transmission signal filtering experiment.The validity of the proposed filtering algorithm for dual energy X ray transmission signals is verified.By analyzing the double energy X ray transmission signal curve and R value of copper and aluminum ladder specimens, the validity of the proposed method based on dual energy X ray transmission analysis is verified.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X705

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