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Acta Optica Sinica, Volume. 41, Issue 17, 1701001(2021)

Design and Implementation of Digital Camera Visibility Instrument

Ming Lei1、*, Kai Nie2, Hansheng Jiang1, Pangda Dai3, and Jingli Wang4
Author Affiliations
  • 1Tianjin Meteorological Information Center, Tianjin 300074, China
  • 2Beijing Meteorological Observation Center, Beijing 100089, China
  • 3Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
  • 4Institute of Urban Meteorology, CMA, Beijing 100089, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (9)
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    References (29)
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    Figures & Tables(9)
    DPVS system observation diagram

    Fig. 1. DPVS system observation diagram

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    Schematic diagram of DPVS target light source system

    Fig. 2. Schematic diagram of DPVS target light source system

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    Block diagram of signal detection and processing circuit based on FPGA

    Fig. 3. Block diagram of signal detection and processing circuit based on FPGA

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    Volt ampere characteristic curve of LED

    Fig. 4. Volt ampere characteristic curve of LED

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    Constant voltage and constant current driving circuit for LED

    Fig. 5. Constant voltage and constant current driving circuit for LED

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    Physical diagram of LED control circuit

    Fig. 6. Physical diagram of LED control circuit

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    Actual observation results of system. (a) 2021-01-07; (b) 2021-01-08; (c) 2021-01-09; (d) 2021-01-10

    Fig. 7. Actual observation results of system. (a) 2021-01-07; (b) 2021-01-08; (c) 2021-01-09; (d) 2021-01-10

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    Comparison results of DPVS, LT31, PWD22, and manual observation. (a) Fine weather; (b) light haze; (c) moderate haze; (d) severe haze

    Fig. 8. Comparison results of DPVS, LT31, PWD22, and manual observation. (a) Fine weather; (b) light haze; (c) moderate haze; (d) severe haze

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    • Table 1. Comparison of observation results of DPVS, LT31 and average visibility

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      Table 1. Comparison of observation results of DPVS, LT31 and average visibility

      LT31 visibilityNumber ofsamplesRelative errorof DPVS /%Relative standarddeviation of DPVS /%Relative errorof LT31 /%Relative standarddeviation of LT31 /%
      V<2 km8010.119.09-1.267.13
      2 km≤V≤5 km40180.6811.672.018.08
      5 km <V≤10 km2326-1.1710.780.9811.95
      10 km <V<15 km18981.359.15-1.1115.22
      Average~0.24~10.17~0.16~10.60
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    Ming Lei, Kai Nie, Hansheng Jiang, Pangda Dai, Jingli Wang. Design and Implementation of Digital Camera Visibility Instrument[J]. Acta Optica Sinica, 2021, 41(17): 1701001

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    Paper Information

    Category: Atmospheric Optics and Oceanic Optics

    Received: Dec. 30, 2020

    Accepted: Mar. 19, 2021

    Published Online: Sep. 3, 2021

    The Author Email: Lei Ming (lmeagle01@163.com)

    DOI:10.3788/AOS202141.1701001

    Topics

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