A Study on Visibility Observation at Nighttime Using Digital Photography Visiometer System

doi:10.3969/j.issn.0372-2112.2018.06.005

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A Study on Visibility Observation at Nighttime Using Digital Photography Visiometer System

更新时间：2025-07-08

- A Study on Visibility Observation at Nighttime Using Digital Photography Visiometer System
- Acta Electronica Sinica Vol. 46, Issue 6, Pages: 1306-1311(2018)
- 作者机构：
  
  1. 中国气象局北京城市气象研究所,北京,100089
  2. 北京市气象探测中心,北京,100089
  3. 中国气象局北京城市气象研究所,北京,100089
  4. 北京市气象探测中心,北京,100089
- 作者简介：
- 基金信息：
  
  Special Research Fund for Non-profit Sector of Ministry of Science and Technology (No.GYHY201106047);Key Technology Integration Project of China Meteorological Administration (No.GMAGJ2014M02);National Natural Science Foundation of China (No.41575156);The Special Fund of Chinese Central Government for Basic Scientific Research Operations in Commonweal Research Institutes (No.IUMKY201605, No.IUMKY201713)
- DOI：10.3969/j.issn.0372-2112.2018.06.005
  CLC： TX851
- Published Online：25 June 2018，
  
  Published：2018
- 稿件说明：
移动端阅览
A Study on Visibility Observation at Nighttime Using Digital Photography Visiometer System[J]. Acta Electronica Sinica, 2018, 46(6): 1306-1311.
DOI：

A Study on Visibility Observation at Nighttime Using Digital Photography Visiometer System[J]. Acta Electronica Sinica, 2018, 46(6): 1306-1311. DOI： 10.3969/j.issn.0372-2112.2018.06.005.

摘要

在数字摄像能见度仪夜间观测系统中，光源亮度均匀性难以达标、稳定性受电源系统波动和环境温度变化的影响，给夜间观测结果带来的误差和波动不可忽略.本文提出选择抗震性强、稳定性高、响应时间短的LED（Light-Emitting-Diode）作为夜间观测光源.采用高密度LED阵列组成面光源，在LED发光板四周增加光源反射镜，在其前方增加柔光板，大大提高了光源亮度的均匀性.采用高稳定度恒压驱动模式，同时增加恒流自反馈驱动电路为LED发光板供电，基本消除了电源系统的波动，大大提高了光源亮度的稳定性.采用对目标算法，有效降低了光源亮度随温度变化引起的观测误差.

Abstract

Digital photography visiometer systems have been well developed and widely used in visibility observation at daytime.However

the observation at nighttime is often limited due to errors and fluctuations associated with the poor uniformity of illumination and instability of lighting-sources at nighttime which might be affected by power-supply sources and environmental temperature changes.In this study

we proposed a specific light-emitting-diode (LED) system as nighttime lighting-source which is anti-shaking

stable

and has a short response time.The uniformity of illumination has been significantly improved by using these high-density arrays of LED lighting sources with four illumination reflectors installed around the LED lighting-source box and one diffuser in the front.To reduce the fluctuations and improve the stability of the power-supply system

we designed a high-stable power supply system with constant-voltage-drive mode and constant self-feedback current drive circuit.Target-oriented algorithms have been developed to minimize the errors due to changes in illumination of lighting sources caused by temperature changes.

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State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences

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Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun Jilin China

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