关键词: 能见度, 透射式, 多次反射, 差分测量

Abstract:

    This paper presents a multi reflection transmission method based atmospheric visibility measurement system in view of such disadvantages as big area occupation and no obstruction on a long-distance lightpath for a traditional  transmission  visibility meter. The system employs an array of reflectors to construct an open air chamber and to achieve the needed optical distance, which can reserve high-precision visibility detection of transmission method and dramatically decrease area occupation. The system also employs a displacement regulator to achieve differential measurement of  atmospheric  extinction coefficient. The system has such unique advantages as strong contamination resistance capability and adjustable measurement sensitivity. Its accuracy estimation proves that its design method is feasible and a new  method  is provided for visibility measurement.