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Chinese Journal of Lasers, Volume. 47, Issue 9, 910003(2020)

Distortion Compensation Technology of Coherent Frequency Modulation Continuous Wave Lidar

Cai Xinyu1,2, Sun Jianfeng1、*, Lu Zhiyong1, Li Yuexin1, Cong Haisheng1, and Han Ronglei1
Author Affiliations
  • 1Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • 2Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences,Beijing 100049, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (14)
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    References (16)
    Cited By (3)
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    Figures & Tables(14)
    Working principle of coherent FMCW lidar

    Fig. 1. Working principle of coherent FMCW lidar

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    Relationship of instantaneous frequency of coherent frequency modulation continuous wave lidar emission, local oscillator, and echo signal with time

    Fig. 2. Relationship of instantaneous frequency of coherent frequency modulation continuous wave lidar emission, local oscillator, and echo signal with time

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    Schematic of push-scan working mode

    Fig. 3. Schematic of push-scan working mode

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    Schematic of lidar push-scan imaging coordinate system

    Fig. 4. Schematic of lidar push-scan imaging coordinate system

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    Lidar scanning imaging scene

    Fig. 5. Lidar scanning imaging scene

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    Point cloud image without velocity compensation

    Fig. 6. Point cloud image without velocity compensation

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    Point cloud image of lidar moving and target stationary (accelerometer method)

    Fig. 7. Point cloud image of lidar moving and target stationary (accelerometer method)

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    Point cloud image of lidar moving and target moving (accelerometer method)

    Fig. 8. Point cloud image of lidar moving and target moving (accelerometer method)

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    Point cloud image of lidar moving and target moving (proposed method)

    Fig. 9. Point cloud image of lidar moving and target moving (proposed method)

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    Lidar imaging system

    Fig. 10. Lidar imaging system

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    Experiment flow

    Fig. 11. Experiment flow

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    Lidar real time speed

    Fig. 12. Lidar real time speed

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    3D lidar point cloud with velocity compensation by proposed method

    Fig. 13. 3D lidar point cloud with velocity compensation by proposed method

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    • Table 1. Experimental parameters of 3D coherent FMCW lidar push-scan imaging based on velocity compensation

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      Table 1. Experimental parameters of 3D coherent FMCW lidar push-scan imaging based on velocity compensation

      ParameterValue
      Carrier wavelength λ /nm1550
      Pulse repetition frequency /kHz8
      Scanning pitch angle φ /( °)10
      Azimuth velocity ω /[(°)/s]2880
      Distance range between lidarand target L /m8--25
      Target size /(m×m×m)0.2×0.25×0.35
      Laser emission power /W0.1
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    Cai Xinyu, Sun Jianfeng, Lu Zhiyong, Li Yuexin, Cong Haisheng, Han Ronglei. Distortion Compensation Technology of Coherent Frequency Modulation Continuous Wave Lidar[J]. Chinese Journal of Lasers, 2020, 47(9): 910003

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    Paper Information

    Category: remote sensing and sensor

    Received: Feb. 27, 2020

    Accepted: --

    Published Online: Sep. 16, 2020

    The Author Email: Jianfeng Sun (sunjianfengs@163.com)

    DOI:10.3788/CJL202047.0910003

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology