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首页> 外文会议>2015 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments >Research on high precision timing system based on FPGA non scanning imaging laser radar
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Research on high precision timing system based on FPGA non scanning imaging laser radar

机译：基于FPGA非扫描成像激光雷达的高精度计时系统研究

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摘要

The article introduced the system structure and imaging principle of no three-dimensional imaging laser radar. This paper used the XC7K325T XILINX chip of KINTEX 7 series and used temporal interpolation method to measure distance. Rough side used PLL multiplier 400MHZ, which reached 2.5ns time accuracy. This method used a thin chip delay chains carry resources to reach 50ps accuracy and greatly improved the accuracy of the timing of imaging. Application technique used a delay line in APD array imaging system, such that each channel distance accuracy greatly improved. Echo signal by photoelectric conversion is completed by APD array detector, and designed by the impedance amplifier and other analog signal processing circuit. FPGA signal processing circuit is to complete the back-end processing, which is the timing function. FPGA array timer clock is to achieve coarse portion through timing, and delay line technique for measuring the length of time a non-integer multiple of the period of the laser pulse emission and the moment of reception, each stage of the delay units delay accuracy of sub ns magnitude, so as to achieve precision measuring part timers. With the above device was close imaging experiments, obtaining the 5 × 5 pixel imaging test results, presented to further improve system accuracy improved method.
机译：介绍了无三维成像激光雷达的系统结构和成像原理。本文使用KINTEX 7系列的XC7K325T XILINX芯片，并使用时间插值法测量距离。粗糙的一侧使用了PLL乘法器400MHZ，其时间精度达到了2.5ns。这种方法使用了细芯片延迟链承载的资源达到了50ps的精度，并大大提高了成像定时的精度。应用技术在APD阵列成像系统中使用了延迟线，从而大大提高了每个通道的距离精度。光电转换后的回波信号由APD阵列检测器完成，并由阻抗放大器和其他模拟信号处理电路设计。 FPGA信号处理电路是完成后端处理的，这是定时功能。 FPGA阵列定时器时钟是通过定时来实现粗略部分，而延迟线技术用于测量时间长度的非整数倍，该时间段是激光脉冲发射的周期和接收的时刻，每一级的延迟单元的延迟精度为ns ns的量级，从而实现精确测量分时器。用以上设备进行了近距离成像实验，获得了5×5像素成像测试结果，提出了进一步提高系统精度的改进方法。

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  • 来源
  • 会议地点 Beijing(CN)
  • 作者

    Yanbo Fu; Shaokun Han; Liang Wang; Yayun Ma;

  • 作者单位

    Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology, School of Optoelectronics, Beijing Institute of Technology, Beijing, 100081, China;

    Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology, School of Optoelectronics, Beijing Institute of Technology, Beijing, 100081, China;

    Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology, School of Optoelectronics, Beijing Institute of Technology, Beijing, 100081, China;

    Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology, School of Optoelectronics, Beijing Institute of Technology, Beijing, 100081, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    non-scanning; LADAR; delay line; APD array; laser; FPGA; range image;

    机译：非扫描激光;延迟线APD阵列；激光; FPGA;范围图像;

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