The Design Of The Transmit And Incept Devices Of The Foreword Scattering Visibility Meter

The visibility is an important factor for meteorological observation . The visibility measurement value and its report is not only used to weather analysis for weather field and also used to aviation , navigation , high way , military , and environmental monitor wildly. As the science and technical development the visibility auto-measuring instrument already wildly used to aviation , navigation, high-way , weather station and environment inspecting and measuring by development country with renewal. Our country requires the visibility auto-measuring instrument be more and more. The foreword scattering visibility meter's price is low, the performance and the stability is good ,so the users favor it, it is the important point of the development of the instrument company in domestic and overseas. The article research the relative project about visibility, it discussed the principle, it introduced the new measuring method opposite the foreword scattering visibility meter and design the transmit and incept devices of foreword scattering visibility for keystone, it is advanced the characteristics of the light source which is should be possess , it show the advantage of the LED used to the light source and selected PIN LED which matching with it, the article is discussed the optics system and design the reasonable object lens structure, measuring and controlling system and the relative design idea ,design method and the accuracy analyzing etc. The article is five chapters The first chapter is show the meaning of subject which is selected and summarized the visibility measurement instrument developing survey in domestic and overseas and confirmed the main research content. The second chapter is discussed the basic principle of visibility measuring instrument, it give the definition of target visibility and the transfer formula of light visibility atmosphere brightness and the light visibility concept, the concept of weather visibility and RVR and its relatives, on it the article introduced the measuring principle of visibility meter and the RVR measuring system. The third chapter we start with the key technology of foreword scattering visibility meter and provide the total design plan of...