数字摄像能见度仪的设计与实现

Design and Implementation of Digital Camera Visibility Instrument

目前,国内外尚没有完全按照能见度定义研制的大气能见度自动观测仪出现。针对这一问题,基于人工观测能见度原理,有效利用CCD数字摄像技术构建了数字摄像能见度自动观测系统(DPVS),研制出一款完全按照能见度定义的新型大气能见度自动观测仪,这为国内外大气能见度的观测提供了一个有效的解决方案。实验结果表明,该系统能够有效观测大气能见度,能见度较低时,该系统对比透射仪器的观测误差在10%左右,而能见度较高时,该系统对比透射仪器的观测误差则在20%左右,且新型自动观测仪的各项指标均符合世界气象组织对能见度仪研制标准的要求。

At present,no automatic observation instrument for atmospheric visibility is available according to visibility definition.To solve this problem,on the basis of the principle of artificial observation visibility and the effective use of CCD digital photography,this paper builds a digital photographic automatic observation system for visibility(DPVS)and develops a new type of automatic observation instrument for atmospheric visibility completely in accordance with visibility definition,which provides an effective solution for the observation of atmospheric visibility.The experimental results show that the system can precisely observe the atmospheric visibility,and the observation error of the proposed system compared to the transmission instrument is about 10%when the visibility is low and about 20%and the visibility is high.All the indices of the new automatic observation instrument meet the requirements of the World Meteorological Organization for the development standard of visibility meters.