An
atmospheric visibility measuring
system is characterized in that the
system can realize full-scale precise measurement of
atmospheric visibility. The
system adopts a measurement structure with a single
light source and double baselines; a
light source transmitting terminal and two
signal receiving terminals are integrated into a
whole body, which reduces the complexity of
optical path debugging and measurement electronic system design, reduces requirements for field installation, improves system practicality, and reduces equipment cost. Meanwhile, the
laser light source is subject to
high frequency modulation, and an
optical filter is installed in the front of a
detector, which improve the system capability of resisting
background light and
stray light influence. In the
signal sampling part, synchronous
demodulation weak signal detection technology is adopted, which improves the
measurement precision and measurement range of the system. The
atmospheric visibility measuring system of the invention is applicable to industries of meteorological stations, airports, highway, harbours,
atmosphere environment monitoring, and the like.