發(fā)布時(shí)間：2018-08-02 17:22

【摘要】：近年來(lái),機(jī)載激光雷達(dá)在軍事應(yīng)用中發(fā)揮著越來(lái)越重要的作用。激光雷達(dá)測(cè)距機(jī)的測(cè)程要求也逐漸向中遠(yuǎn)程發(fā)展,如何有效評(píng)估機(jī)載激光雷達(dá)的測(cè)距能力對(duì)激光雷達(dá)產(chǎn)品研發(fā)有著重要的意義。以往的評(píng)估方法主要針對(duì)激光雷達(dá)整體而言,測(cè)試設(shè)備成本高,靈活性差。隨著激光雷達(dá)向數(shù)字化測(cè)距方向的發(fā)展,激光雷達(dá)信息處理能力也直接影響到測(cè)距能力,因此也成為性能評(píng)估的重要一環(huán)。目前還沒有有效的手段在研發(fā)階段就能對(duì)激光雷達(dá)的信息處理能力進(jìn)行全面的測(cè)試,本文設(shè)計(jì)了一種機(jī)載激光雷達(dá)回波模擬設(shè)備,模擬真實(shí)測(cè)距過(guò)程中回波信號(hào),用于對(duì)激光雷達(dá)的信號(hào)處理電路的測(cè)試。激光回波模擬設(shè)備采用上位機(jī)+采集轉(zhuǎn)換電路的架構(gòu),上位機(jī)與采集轉(zhuǎn)換電路之間通過(guò)USB接口傳輸數(shù)據(jù)。采集轉(zhuǎn)換電路內(nèi)包含了回波模擬設(shè)備的所有硬件電路,包括主控芯片F(xiàn)PGA、回波采集模塊、回波模擬輸出模塊及USB數(shù)據(jù)傳輸模塊的設(shè)計(jì)。其中,主控芯片F(xiàn)PGA實(shí)現(xiàn)整個(gè)系統(tǒng)工作流程的控制,回波采集模塊通過(guò)AD轉(zhuǎn)換采集真實(shí)的回波數(shù)據(jù)并通過(guò)USB接口傳輸給上位機(jī)保存,回波模擬輸出模塊將上位機(jī)通過(guò)USB接口傳輸?shù)哪M回波數(shù)據(jù)通過(guò)DA轉(zhuǎn)換輸出,上位機(jī)采用VC++6.0實(shí)現(xiàn)了良好的人機(jī)交互界面,用于設(shè)置各項(xiàng)回波數(shù)據(jù)的參數(shù),存儲(chǔ)相關(guān)數(shù)據(jù),配合采集轉(zhuǎn)換電路實(shí)現(xiàn)各項(xiàng)功能。本文研究的激光雷達(dá)回波模擬設(shè)備能夠采集并存儲(chǔ)真實(shí)測(cè)距過(guò)程的回波數(shù)據(jù),也能模擬靜態(tài)目標(biāo)測(cè)距過(guò)程中或動(dòng)態(tài)目標(biāo)測(cè)距過(guò)程的回波數(shù)據(jù),并通過(guò)回放生成的模擬數(shù)據(jù)對(duì)激光雷達(dá)的信號(hào)處理電路進(jìn)行測(cè)試。經(jīng)過(guò)測(cè)試,該設(shè)備工作良好,易于操作,為激光雷達(dá)的信號(hào)處理能力的評(píng)估提供了一種有效的解決方案。
[Abstract]:In recent years, airborne lidar plays a more and more important role in military applications. The range requirement of laser radar rangefinder is also developing to the middle and long range. How to effectively evaluate the ranging capability of airborne lidar is of great significance to the research and development of lidar products. The previous evaluation methods are mainly aimed at lidar as a whole, the cost of testing equipment is high, and the flexibility is poor. With the development of lidar to digital ranging, the information processing ability of lidar has a direct impact on ranging capability, so it has become an important part of performance evaluation. At present, there is no effective means to test the information processing ability of lidar. In this paper, an airborne laser radar echo simulation equipment is designed to simulate the echo signal in the real ranging process. It is used to test the signal processing circuit of lidar. The laser echo analog device adopts the architecture of the acquisition and conversion circuit of the host computer. The data is transmitted between the upper computer and the acquisition and conversion circuit through the USB interface. The acquisition and conversion circuit includes all the hardware circuits of the echo analog device, including the design of the main control chip FPGA, the echo acquisition module, the echo analog output module and the USB data transmission module. Among them, the main control chip FPGA realizes the control of the whole system work flow. The echo acquisition module collects the real echo data through AD conversion and transmits it to the upper computer through the USB interface. The echo simulation output module outputs the analog echo data transmitted by the host computer through USB interface through DA conversion. The host computer realizes a good man-machine interface with VC 6.0, which is used to set the parameters of the echo data and store the relevant data. With the acquisition conversion circuit to achieve the various functions. The laser radar echo simulation equipment studied in this paper can collect and store the echo data of the real ranging process, and can also simulate the echo data of the static target ranging process or the dynamic target ranging process. The signal processing circuit of lidar is tested by the simulated data generated by playback. The test results show that the equipment works well and is easy to operate, which provides an effective solution for the evaluation of the signal processing ability of lidar.
【學(xué)位授予單位】：河南科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TN958.98

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 曾嫦娥;王茜劏;常崗;單長(zhǎng)勝;王強(qiáng);;脈沖激光測(cè)距機(jī)最大測(cè)程測(cè)試方法研究[J];紅外與激光工程;2005年06期

2 孫斌,王小兵,林軼,萬(wàn)強(qiáng),盧常勇,郭延龍;無(wú)靶板消光比法檢測(cè)激光測(cè)距能力的研究[J];激光技術(shù);2004年01期

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本文編號(hào)：2160141