基于FPGA的激光雷达回波信号数据采集卡设计

回波信号数据采集设备是激光雷达系统的关键部分。为了提高信噪比,回波信号数据采集设备应当具有滤波和高速数据累加功能,为了满足不同重复频率激光雷达的探测需求,累加过程的采集深度和累加次数等参数应当是可配置的。使用FPGA作为主控设备,实现了一个采样率为20 MHz, 具有滤波和硬件累加功能,且参数可配置的通用回波信号数据采集卡(DAQ card)。测试结果表明,在不同重复频率的触发信号下,采集卡实现了基本的参数配置功能和累加功能,信噪比为71.9 dB。与国外某回波信号数据采集设备相比,采集卡在高重复频率激光雷达中具有更远的探测距离和更高的信噪比。

Abstract

Data acquisition equipment of lidar echo signal is the critical part of lidar system. In order to improve signal-to-noise ratio(SNR), data acquisition equipment should have the function of filtering and high-speed data accumulation. In order to meet the requirement of lidars with different repetition frequency, the parameters such as sampling depth and accumulating time should be reconfigurable. A universal data acquisition card of lidar echo signal (DAQ card) with a sampling rate of 20 MHz and reconfigurable parameters, which has the function of filtering and hardware accumulation, is realized by using FPGA as main control element. The test results show that the DAQ card achieves the basic parameter configuration function and accumulation function under the different repetition rate of the trigger signal, and the SNR is 71.9 dB. Compared with a foreign echo signal acquisition equipment, the DAQ card has longer detection range and higher SNR in high repetition frequency lidar.

参考文献

[1] 辛文辉, 华灯鑫, 李仕春,等. 激光雷达多通道高速数据采集系统设计[J]. 量子电子学报, 2014, 31(3): 355-360.

Xin Wenhui, Hua Dengxin, Li Shichun,et al. System design of a multi-channel data acquisition for laser lidar[J]. Chinese Journal of Quantum Electronics, 2014, 31(3): 355-360(in Chinese).

[2] 王康, 张玉钧, 李胜,等. 基于FPGA的半导体激光云高仪数据采集处理方法[J]. 大气与环境光学学报, 2015, 10(1): 39-45.

Wang Kang, Zhang Yujun, Li Sheng,et al. Data collection and processing method of the semiconductor laser ceilometer based on FPGA[J]. Journal of Atmospheric and Environmental Optics, 2015, 10(1): 39-45(in Chinese).

[3] Licel GmbH. TR20-160 Lidar transient recorder manual[EB/OL]. http://licel.com/manu- als/TRInstallation.pdf. 2012.

[4] 付毅宾. 激光雷达信号获取关键技术研究[D]. 北京: 中国科学院大学博士论文, 2015.

Fu Yibin.Study on Key Technology of Lidar Signal Acquization[D]. Beijing: Doctorial Dissertation of University of Chinese Academy of Sciences, 2015.

[5] 胡炜.激光雷达回波信号处理与检测方法研究[D]. 成都: 电子科技大学硕士论文, 2003.

Hu Wei.Study on Ladar Echo Signal Processing and Detection Method[D]. Chengdu: Master’s Thesis of University of Electronic Science and Technology of China, 2003.

[6] Analog DevicesInc. AD9266 Data Sheet[EB/OL]. http://www.analog.com/media/en/technical- documentation/ data- sheets/AD9266. pdf. 2016.

[7] 骆丽娜, 杨万全. 高速ADC的性能参数与测试方法[J]. 实验科学与技术, 2007, 5(1): 145-147.

Luo Lina, Yang Wanquan. ADC parameters and the test method[J].Experiment Science and Technology, 2007, 5(1):145-147(in Chinese).

[8] 文斐,梁福田,夏龙生, 等.大气环境监测激光雷达数据采集系统[J]. 核电子学与探测技术, 2011, 31(3): 277-281.

Wen Fei, Liang Futian, Xia Longsheng,et al. Data acquisition system for atmospheric lidar[J]. Nuclear Electronics & Detection Technology, 2011, 31(3): 277-281(in Chinese).

李新强, 张天舒, 付毅宾, 项衍, 刘洋. 基于FPGA的激光雷达回波信号数据采集卡设计[J]. 大气与环境光学学报, 2018, 13(2): 150. LI Xinqiang, ZHANG Tianshu, FU Yibin, XIANG Yan, LIU Yang. Design of Data Acquisition Card for Lidar Echo Signal Based on FPGA[J]. Journal of Atmospheric and Environmental Optics, 2018, 13(2): 150.

基于FPGA的激光雷达回波信号数据采集卡设计

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