Apparatus and method for measuring atmospheric transmission and determining meteorological visual range

摘要

#$%^&*AU2011218728B220120419.pdf#####ABSTRACT The invention relates to an apparatus and a method for measuring the atmospheric transmission and determining meteorological visual range, these being used in particular on runways. 5 It is the object of the invention to provide an apparatus and a method with the aid of which the disadvantages of the prior art can be eliminated. According to the invention, in the case of an apparatus for measuring atmospheric transmission and determining meteorological visual range which has a transmitting unit and receiving unit which are fastened on a vertical tubular 10 structure in each case, the object is achieved by virtue of the fact that the vertical tube structure consists of a bearing inner tube and an outer tube which is completely decoupled mechanically and protects the inner tube, all the units necessary for measurement, which are responsible, in particular, for the optical alignment of transmitting and receiving units, being fitted on the inner tube, and 15 there being fitted on the outer tube all the structural elements which can vary their position owing to dead weight, wind load stressing or one-sided insolation such that the optical alignment remains uninfluenced by these effects, that a scattered light measuring arrangement is an integral constituent of the transmission measuring arrangement and is directly connected to the outer tube, that 20 equipment plates positioned at 90* to one another in V-shaped fashion are arranged in each case in front of the transmitting unit and receiving unit to protect the optical and electronic components against fouling, that each V-shaped equipment plate arrangement is assigned a dedicated transmission measuring device for measuring transparency, which determines the degree of fouling of the 25 equipment plates, and that both the optical system of the transmitter and that of the receiver are arranged cardanically mounted in an adjustable fashion.