本文關(guān)鍵詞：脈沖激光電爆炸測量中的數(shù)據(jù)處理方法研究　出處：《西安電子科技大學》2015年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 等離子體 激光干涉 移動閾值 爆炸區(qū)定位 點云無限逼近

【摘要】：電爆鋁絲制備納米鋁粉是目前工業(yè)界生產(chǎn)納米粉體的主要方式之一,其生產(chǎn)的過程中會伴隨有等離子體的產(chǎn)生,而等離子體的產(chǎn)生是影響鋁粉生產(chǎn)效率和質(zhì)量的重要因素之一。對等離子體的檢測是完善制備工藝的所必需的條件。本文主要的目的是對等離子體的密度分布檢測提出一個系統(tǒng)的解決方案。本文章中通過對目前多種等離子體檢測方法的研究,提出采用馬赫-曾德激光干涉儀對電爆炸情況進行檢測。通過對激光在等離子體中的傳播理論分析,結(jié)合工業(yè)生產(chǎn)的實際,提出激光透過率檢測方法計算等離子體濃度的分布。在爆炸區(qū)由于等離子體的存在,會造成激光透過能量的不均勻,根據(jù)爆炸區(qū)激光強度的分布結(jié)合等離子體對激光的衰減,便可以對其濃度分布進行計算,爆炸區(qū)信息通過對干涉圖像的處理提取可以得到。本文在干涉圖像處理方面,先是提出用提取真彩圖RGB通道法和統(tǒng)一閾值法對圖像做初步濾波去噪,使用自行設(shè)計的移動閾值法對灰度圖做二值化處理,再結(jié)合Yantagai算法提出采用極值細化法對二值圖進行細化處理,得到了較好的效果。然后是對爆炸區(qū)的定位,采用對條紋中心線末端點進行點云無限逼近直線擬合的方法定位出爆炸區(qū)邊界,之后根據(jù)激光在等離子體中的透過率計算等離子體濃度分布。在完成對圖像處理算法和等離子體濃度計算的算法設(shè)計之后,利用MATLAB設(shè)計出圖像處理軟件,其處理結(jié)果達到了等離子體密度測試精度為10~(19)/cm~3≤2%×FS(FS=3×10~(21)/cm~3)的要求。
[Abstract]:Preparation of nanocrystalline aluminum powder by electric detonation of aluminum wire is one of the main ways to produce nano-powder in industry at present, and plasma will be produced in the process of production. The generation of plasma is one of the important factors that affect the production efficiency and quality of aluminum powder. The detection of plasma is necessary to improve the preparation process. The main purpose of this paper is to check the density distribution of plasma. A systematic solution is proposed. In this paper, a variety of plasma detection methods are studied. In this paper, a Mach Zende laser interferometer is proposed to detect the electric explosion. By analyzing the propagation theory of laser in plasma, combining with the practice of industrial production. The laser transmittance measurement method is proposed to calculate the plasma concentration distribution. The existence of the plasma in the explosion region will cause the laser transmission energy to be uneven. According to the laser intensity distribution in the explosion zone and the attenuation of the laser by plasma, the concentration distribution of the laser can be calculated. The information of the explosion area can be obtained by processing the interference image. In the aspect of the interference image processing, firstly, we propose the method of extracting true color image RGB channel and the unified threshold method to do the preliminary filtering and denoising of the image. The self-designed moving threshold method is used to binary the gray image, and combined with the Yantagai algorithm, the extreme value thinning method is proposed to refine the binary image. A good result is obtained, and then the explosion zone is located, and the boundary of the explosion zone is located by the point cloud infinite approximation straight line fitting method to the terminal point of the fringe centerline. Then the plasma concentration distribution is calculated according to the laser transmittance in the plasma. After the image processing algorithm and the plasma concentration calculation algorithm are designed. The image processing software is designed by using MATLAB. The experimental results meet the requirement of plasma density measurement accuracy of 10 ~ 10 ~ 1 / cm ~ (3) 鈮，

本文編號：1389775