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Chinese Journal of Lasers, Volume. 48, Issue 20, 2010001(2021)

Aerosol Horizontal Distribution Detected by Lidar in Excavation Stage of Construction Site Foundation Pit

Qiang Zhao1,2、*, Hongchao Su1、**, Mingjian Yi1, Dongsheng Yu3, and Chidong Xu3
Author Affiliations
  • 1School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei, Anhui 230601, China
  • 2Anhui Institute of Strategic Study on Carbon Dioxide Emissions Peak and Carbon Neutrality in Urban-Rural Development, Hefei, Anhui 230601, China
  • 3Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (12)
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    References (17)
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    Figures & Tables(12)
    LVIS-T100 portable lidar. (a) Overall appearance; (b) radar system structure

    Fig. 1. LVIS-T100 portable lidar. (a) Overall appearance; (b) radar system structure

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    Lidar observation of construction site. (a) Location map; (b) site map of foundation pit excavation

    Fig. 2. Lidar observation of construction site. (a) Location map; (b) site map of foundation pit excavation

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    Geometric factor correction of lidar. (a) Geometric factor; (b) change number of echo photons before and after geometric factor correction

    Fig. 3. Geometric factor correction of lidar. (a) Geometric factor; (b) change number of echo photons before and after geometric factor correction

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    Horizontal extinction coefficient profiles at four moments on August 24, 2019

    Fig. 4. Horizontal extinction coefficient profiles at four moments on August 24, 2019

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    Correlation between extinction coefficient and PM10 mass concentration

    Fig. 5. Correlation between extinction coefficient and PM10 mass concentration

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    Histogram of the hourly mean value of PM10 mass concentration

    Fig. 6. Histogram of the hourly mean value of PM10 mass concentration

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    Horizontal distribution profiles of PM10 mass concentration at 9 o'clock every day from October 19 to 22

    Fig. 7. Horizontal distribution profiles of PM10 mass concentration at 9 o'clock every day from October 19 to 22

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    Change of PM10 mass concentration at different distances on October 22, 2019

    Fig. 8. Change of PM10 mass concentration at different distances on October 22, 2019

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    Contour map of PM10 mass concentration change

    Fig. 9. Contour map of PM10 mass concentration change

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    Profile of the contour line of PM10 mass concentration change

    Fig. 10. Profile of the contour line of PM10 mass concentration change

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    • Table 1. Lidar parameters

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      Table 1. Lidar parameters

      ParameterContent
      Laser wavelength/nm532 (LD pumped Nd∶YAG)
      Energy/μJ~20@2500 Hz
      Laser pulse width/ns≤15
      Receiving telescopeCaliber Φ100 mm
      Filter bandwidth/nm0.5
      Number of acquisitionchannels1 piece
      Data collectorMulti-channel photoncounter

    • Table 2. Comparison of the relative error between the inversion hourly mean value and the measured value of PM10 mass concentration at 0.21 km

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      Table 2. Comparison of the relative error between the inversion hourly mean value and the measured value of PM10 mass concentration at 0.21 km

      DateInversion mean valueMeasured valueRelative error
      October 19117.2658132.4139-11.44%
      October 20115.674499.146716.67%
      October 21135.1572122.780910.08%
      October 22128.6338147.6513-12.88%
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    Qiang Zhao, Hongchao Su, Mingjian Yi, Dongsheng Yu, Chidong Xu. Aerosol Horizontal Distribution Detected by Lidar in Excavation Stage of Construction Site Foundation Pit[J]. Chinese Journal of Lasers, 2021, 48(20): 2010001

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    Paper Information

    Received: Jan. 29, 2021

    Accepted: Mar. 18, 2021

    Published Online: Sep. 16, 2021

    The Author Email: Zhao Qiang (rommel99@163.com), Su Hongchao (SuhongchaoD@163.com)

    DOI:10.3788/CJL202148.2010001

    Topics

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