本文選題：激光測距 + 互相關��； 參考：《西安工業(yè)大學》2015年碩士論文

【摘要】：隨著激光、電子等相關技術的快速發(fā)展,激光測距技術在航空航天、大地測量、工程建筑、工業(yè)、軍事等領域上得到了廣泛的應用。同無線電以及微波相比,激光探測系統(tǒng)接收的回波信號受到不同材料目標的特性影響。這些因素主要與目標的直徑、距離、輻射角度、表面反射率等有關,而目標材料的這些特性又與其自身的顏色、大小、材質、表面粗糙程度等有關,這會影響激光測距系統(tǒng)的測距精度。因此,研究不同材料的目標的回波特性,對于提高激光測距系統(tǒng)的測距精度是很有必要的。本論文對不同材料的目標回波特性進行分析,研究了光滑表面和粗糙表面的反射特性。從激光發(fā)射功率和探測方程入手進行定性分析,得到不同材料的目標的激光回波特性。對互相關理論進行分析,采用互相關算法進行激光測距。通過建立發(fā)射接收的數(shù)學模型,借助互相關算法,通過推導,得出互相關測距的優(yōu)勢,用軟件和實際的波形進行分析驗證。最后設計激光測距電路,搭建實驗測試平臺。在搭建完實驗平臺后,分別用報紙板,綠紙板,木板三種不同材料的目標進行實驗。實驗分為三組,分別為相同距離下不同目標的實驗,相同距離下不同采樣速率的實驗,不同距離不同材料目標的實驗。通過對實驗結果進行分析,對不同材料的目標采用互相關算法進行測距可以改善測距的精度。
[Abstract]:With the rapid development of laser, electronics and other related technologies, laser ranging technology has been widely used in aerospace, geodesy, engineering, construction, industry, military and other fields. Compared with radio and microwave, the echo signal received by laser detection system is affected by the characteristics of different material targets. These factors are mainly related to the diameter, distance, radiation angle, surface reflectivity of the target, and these properties of the target material are related to its own color, size, material quality, surface roughness, etc. This will affect the accuracy of the laser ranging system. Therefore, it is necessary to study the echo characteristics of different materials in order to improve the ranging accuracy of laser ranging system. In this paper, the target echo characteristics of different materials are analyzed, and the reflection characteristics of smooth and rough surfaces are studied. The laser echo characteristics of different materials are obtained by qualitative analysis based on laser emission power and detection equation. The cross correlation theory is analyzed and the laser ranging is carried out by cross correlation algorithm. By establishing the mathematical model of transmitting and receiving, with the aid of cross-correlation algorithm and derivation, the advantages of cross-correlation ranging are obtained, which are analyzed and verified by software and actual waveforms. Finally, the laser ranging circuit is designed and the experimental test platform is built. After setting up the experiment platform, the paper board, green board and plank were used to carry out the experiment. The experiment is divided into three groups: the experiment of different target at the same distance, the experiment of different sampling rate at the same distance, and the experiment of different material target at different distance. By analyzing the experimental results, the accuracy of ranging can be improved by using cross-correlation algorithm to measure the target of different materials.
【學位授予單位】：西安工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN249

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本文編號：2061231