【摘要】：論文詳細(xì)的研究了脈沖激光雷達(dá)測距原理及關(guān)鍵技術(shù),并介紹了脈沖激光雷達(dá)測距系統(tǒng)的各個組成部分。論文中設(shè)計(jì)的回波接收電路是整個系統(tǒng)的關(guān)鍵部分之一,接收電路性能的好壞直接決定著測距效果的優(yōu)劣,這一部分主要包括光電轉(zhuǎn)換電路、脈沖信號放大電路、時刻鑒別電路等三部分組成。 脈沖回波信號接收電路我們選用低噪聲,寬頻帶、高速跨阻放大器OPA657搭建前置放大電路；主放大部分選用帶寬較寬、低噪聲的電流反饋型電壓放大器AD8009來搭建,它是一款增益不隨帶寬變化的運(yùn)放,論文對電路設(shè)計(jì)的各部分噪聲、帶寬等進(jìn)行了詳細(xì)的理論分析并與我們的實(shí)驗(yàn)數(shù)據(jù)進(jìn)行對比,符合實(shí)驗(yàn)要求。論文采用高精度的時間間隔測量芯片TDC-GP21來測量激光飛行時間。 論文詳細(xì)的分析了目前常用的幾種時刻鑒別法的優(yōu)缺點(diǎn)。理論上提出了一種可以減小因回波信號幅度變化而引起時間漂移的時刻鑒別方法,同時理論上設(shè)計(jì)了一種可以消除電子元器件的固定延時的誤差大小的脈沖激光測距裝置。 最后完成系統(tǒng)樣機(jī)的研制,對原理樣機(jī)的測試基本上符合我們預(yù)定的要求。
[Abstract]:In this paper, the principle and key technology of pulse laser radar ranging are studied in detail, and the components of pulse laser radar ranging system are introduced. The echo receiving circuit designed in this paper is one of the key parts of the whole system. The performance of the receiving circuit directly determines the distance measuring effect. This part mainly includes the photoelectric conversion circuit, the pulse signal amplification circuit. The time discriminant circuit is composed of three parts. Pulse echo signal receiving circuit we choose low noise, wide band, high speed transresistance amplifier OPA657 to build preamplifier circuit. The majority of the main amplifier uses a wide bandwidth, low noise current feedback voltage amplifier AD8009 to build, it is a gain no change with the bandwidth of the operational amplifier, the paper of the circuit design of each part of the noise, The bandwidth is analyzed in detail and compared with our experimental data. In this paper, a high-precision time interval measurement chip TDC-GP21 is used to measure the laser time of flight. In this paper, the advantages and disadvantages of several time discrimination methods are analyzed in detail. A time discrimination method which can reduce the time drift caused by the amplitude variation of the echo signal is proposed theoretically. A pulse laser ranging device is designed which can eliminate the error of the fixed delay of the electronic components. Finally, the prototype of the system is developed, and the testing of the prototype is basically in line with our scheduled requirements.
【學(xué)位授予單位】：中國科學(xué)技術(shù)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN958.98

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