本文關(guān)鍵詞：基于四象限探測器的光斑位置檢測數(shù)據(jù)采集與處理系統(tǒng)的設(shè)計及實(shí)現(xiàn)　出處：《中國科學(xué)院研究生院(長春光學(xué)精密機(jī)械與物理研究所)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 四象限探測器 光斑位置檢測 數(shù)據(jù)采集 實(shí)時處理 USB 3.0

【摘要】：大氣激光通信具有抗干擾能力強(qiáng)、保密性好、通信容量大等優(yōu)勢,已經(jīng)成為當(dāng)今的研究熱點(diǎn)。在大氣激光通信中,高精度、高自動化的ATP技術(shù)是關(guān)系到空間光通信鏈路能否成功建立以及通信質(zhì)量好壞的關(guān)鍵技術(shù)之一,而對于ATP中光斑位置提取,四象限探測器有其無法比擬的優(yōu)勢。本論文針對四象限探測器信號采集設(shè)計了高精度同步數(shù)據(jù)采集與處理系統(tǒng),主要實(shí)現(xiàn)了既能為ATP系統(tǒng)提供實(shí)時脫靶量,又具有計算機(jī)存儲原始數(shù)據(jù)的功能。具體研究內(nèi)容包括:1、介紹了四象限探測器光斑位置檢測的原理,深入分析了其對采集與處理系統(tǒng)的要求,并結(jié)合大氣激光通信的實(shí)際應(yīng)用需求,提出了基于FPGA+DSP+USB 3.0架構(gòu)的總體設(shè)計方案。2、在分析四象限探測器光斑位置檢測對數(shù)據(jù)采集與處理需求的基礎(chǔ)上,首先設(shè)計了前端全差分調(diào)理電路,有效提高了系統(tǒng)的抗干擾能力;然后選擇24位四通道同步ΔΣ型數(shù)模轉(zhuǎn)換芯片,通過FPGA控制完成四路數(shù)據(jù)同步采集功能,并通過誤差校準(zhǔn)、合理布線等方式來提高采集系統(tǒng)的性能;最后利用DSP強(qiáng)大的數(shù)字信號處理能力,完成實(shí)時處理模塊的硬件設(shè)計,并在其基礎(chǔ)之上實(shí)現(xiàn)光斑解算算法,可為ATP實(shí)時提供10kHz的脫靶量信息。3、在深入研究USB 3.0的基礎(chǔ)上,對USB 3.0核心板進(jìn)行了二次開發(fā),完成高速率的四象限探測器原始數(shù)據(jù)存儲功能。首先將USB 3.0核心板和實(shí)時處理模塊相融合完成硬件設(shè)計;然后根據(jù)系統(tǒng)對數(shù)據(jù)量和靈活性的要求,將DDRⅡ模擬為FIFO,完成了數(shù)據(jù)緩沖系統(tǒng)的設(shè)計;最后重新設(shè)計USB 3.0芯片固件,并根據(jù)固件完成了USB 3.0控制邏輯及上位機(jī)程序,實(shí)現(xiàn)了數(shù)據(jù)存儲功能。4、利用設(shè)計完成的采集與處理系統(tǒng),首先測試了AD的有效分辨率和各通道的同步性,其有效分辨率達(dá)到18bit以上;然后測試了實(shí)時處理模塊實(shí)時性,總延時為10μs;最后測試了USB 3.0模塊的傳輸性能,結(jié)果表明在傳輸速率為92MB/s時,無丟包、誤碼發(fā)生,性能穩(wěn)定可靠。
[Abstract]:Atmospheric laser communication has the advantages of strong anti-jamming ability, good confidentiality, large communication capacity, and has become a research hotspot. In atmospheric laser communication, high precision. High automatic ATP technology is one of the key technologies related to the successful establishment of space optical communication link and the quality of communication. However, the spot location in ATP is extracted. The four-quadrant detector has incomparable advantages. This paper designs a high-precision synchronous data acquisition and processing system for the four-quadrant detector signal acquisition and processing system, which can provide real-time miss distance for ATP system. It also has the function of storing raw data by computer. The specific research contents include: 1. The principle of spot position detection of four-quadrant detector is introduced, and the requirement of collecting and processing system is analyzed in depth. Combined with the practical application requirements of atmospheric laser communication, the overall design scheme based on FPGA DSP USB 3.0 architecture is proposed. 2. On the basis of analyzing the demand of data acquisition and processing for spot position detection of four-quadrant detector, the full-differential conditioning circuit of front end is designed firstly, which effectively improves the anti-interference ability of the system. Then the 24-bit four-channel synchronous 螖 危 digital-analog conversion chip is selected to complete the four-channel synchronous data acquisition function through FPGA control, and the performance of the acquisition system is improved by error calibration and reasonable wiring. Finally, using the powerful digital signal processing ability of DSP, the hardware design of real-time processing module is completed, and the algorithm of spot solving is realized on the basis of it. It can provide 10kHz miss distance information for ATP in real time. On the basis of deeply studying USB 3.0, the core board of USB 3.0 has been redeveloped. The original data storage function of the high speed four-quadrant detector is completed. Firstly, the hardware design is completed by combining the USB 3.0 core board with the real-time processing module. Secondly, according to the requirement of data volume and flexibility, DDR 鈪，

本文編號：1416410