| 基于FPGA的激光雷达高速数据采集系统设计 |
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| 引用本文： | 辛文辉,李仕春,华灯鑫,宋跃辉,狄慧鸽,周智荣.基于FPGA的激光雷达高速数据采集系统设计[J].光子学报,2014,41(8):967-971. |
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| 作者姓名： | 辛文辉 李仕春 华灯鑫 宋跃辉 狄慧鸽 周智荣 |
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| 作者单位： | 西安理工大学 机械与精密仪器工程学院,西安 710048 |
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| 基金项目： | 国家自然科学基金(No.41027004) 科学仪器基础研究专项、教育部博士学科点专项基金(博导类)(No.20106118110005)资助 |
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| 摘 要： | 为了对激光雷达的回波信号进行采集,设计了一款基于FPGA的高速数据采集、预处理系统.该系统以FPGA内嵌DRAM作为存储器,以同步有限状态机作为控制方式,可在1 kHz的外触发信号激励下,以20 MHz的采集频率采集数据,并可在不丢失脉冲的情况下,对采集到的4 096个数据点进行5 000次以上的对应点累加平均(滤除背景噪音).设计完成的数据采集系统已应用于一台米散射激光雷达系统中,达到了30 km探测距离、7.5 m时空分辨率的设计要求.
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| 关 键 词： | 激光雷达 回波信号 高速数据采集 同步状态机 双端口RAM |
| 收稿时间： | 2012-02-07 |
Design of a High-speed Data Acquisition System Based on FPGA for Laser Radar |
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| XIN Wen-hui,LI Shi-chun,HUA Deng-xin,SONG Yue-hui,DI Hui-ge,ZHOU Zhi-rong.Design of a High-speed Data Acquisition System Based on FPGA for Laser Radar[J].Acta Photonica Sinica,2014,41(8):967-971. |
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| Authors: | XIN Wen-hui LI Shi-chun HUA Deng-xin SONG Yue-hui DI Hui-ge ZHOU Zhi-rong |
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| Institution: | School of Mechanical Instrumental Ingineering, Xi'an University of Technology, Xi'an 710048,China |
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| Abstract: | A high-speed data acquisition and preprocessing system was proposed based on FPGA for echo signal sampling of laser radar. By use of embedded DRAM and synchronous finite state-machine, the designed system, triggered by a 1 kHz excitation signal, can sample the signal at the rate of 20 MHz, and the 4 096 sampled data can be accumulated correspondingly more than 5 000 times for the purpose of filtering background noise. The completed system was applied in a Mie scattering laser radar, which can achieve the spatial and temporal resolution of 7.5 meter and the detection range of 30 km. |
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| Keywords: | Laser rader Echo signal High-speed data acquisition Synchronous finite state-machine Dual-port RAM |
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