Abstract
Atmospheric visibility is close to the transportation safety. In order to get accurate atmospheric visibility, according to atmosphere backscattering theory, a novel visibility measurement system is designed. The system adopts many modular devices such as semiconductor laser, silicon avalanche photodiode detector, multi channel photon counting card, embedded computer and so on. Where embedded computer is the core of the system, to realize system timing control, visibility inversion and information display. Finally, the objective and convenient measurement of atmospheric horizontal visibility and slant visibility are achieved. Outfield comparison experiments show that in low visibility weather conditions, the system obtains high measurement accuracy, which has high practical value and wonderful development prospect.
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