数字摄像能见度仪夜间观测技术研究

doi:10.3969/j.issn.0372-2112.2018.06.005

电子学报 ›› 2018, Vol. 46 ›› Issue (6): 1306-1311.DOI: 10.3969/j.issn.0372-2112.2018.06.005

数字摄像能见度仪夜间观测技术研究

王京丽¹, 刘旭林², 刘金城², 阮顺贤¹, 韦涛², 聂凯²

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

收稿日期:2016-03-23 修回日期:2016-11-01 出版日期:2018-06-25
- 通讯作者:
- 刘旭林
- 作者简介:
- 王京丽,女,1960年3月出生于北京,学士,研究员,主要研究方向为大气探及大气环境,近年主要从事数字摄像能见度仪研制工作.E-mail:jlwang@ium.cn
- 基金资助:
- 科技部公益性行业专项 (No.GYHY201106047）; 气象关键技术集成项目 (No.GMAGJ2014M02）; 国家自然基金 (No.41575156）; 中央级公益性科研院所基本科研业务费专项 (No.IUMKY201605，No.IUMKY201713）

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

WANG Jing-li¹, LIU Xu-lin², LIU Jin-cheng², RUAN Shun-xian¹, WEI Tao², NIE Kai²

1. Institute of Urban Meteorology, China Meteorological Administration, Beijing 100089, China;
2. Beijing Meteorological Observation Center, Beijing 100089, China

Received:2016-03-23 Revised:2016-11-01 Online:2018-06-25 Published:2018-06-25

摘要/Abstract

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.

关键词: 能见度, LED, 夜间观测, 均匀性, 稳定性

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.

Key words: visibility, LED, nighttime observation, uniformity, instability

中图分类号:

TX851

王京丽, 刘旭林, 刘金城, 阮顺贤, 韦涛, 聂凯. 数字摄像能见度仪夜间观测技术研究[J]. 电子学报, 2018, 46(6): 1306-1311.

WANG Jing-li, LIU Xu-lin, LIU Jin-cheng, RUAN Shun-xian, WEI Tao, NIE Kai. A Study on Visibility Observation at Nighttime Using Digital Photography Visiometer System[J]. Acta Electronica Sinica, 2018, 46(6): 1306-1311.

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数字摄像能见度仪夜间观测技术研究

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

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