Automatic continuous detection device of micro-pulse differential absorption lidar water vapor spatial and temporal distribution

Abstract

The invention discloses an automatic continuous detection device of micro-pulse differential absorption lidar water vapor spatial and temporal distribution. The device comprises dual wavelength detection light sources, a lidar receiving optical system, a signal detection system, a three dimensional rotating platform, a transient recorder, an automatic temperature and humidity recorder and the like. The wavelengths of the two detection light sources are respectively positioned on a water vapor absorption peak and a water vapor non-absorption peak, the detection light can be transmitted into atmosphere at any angle, water vapor absorption characteristic backward scattering signals in specific spectral lines are obtained, water vapor distance-distinguished relative humidity profiles in transmission paths of light are obtained by inversion, and after profiles being calibrated, high-resolution and high-precision water vapor relative humidity spatial and temporal distribution data in light paths is finally obtained. The automatic continuous detection device can carry out day and night all-weather observation for water vapor relative humidity stereo distribution, and has advantages of high time resolution, high spatial resolution and high detection precision.

Description

technical field [0001] The present invention relates to an optical telemetry receiving device and method, in particular to a combination of differential absorption laser radar technology and micro-pulse laser radar technology to establish a dual-wavelength differential absorption micro-pulse laser radar device to realize automatic monitoring of the temporal and spatial distribution of water vapor in the atmosphere. Continuous monitoring techniques and methods. Background technique [0002] There is not much water vapor in the atmosphere, and it only accounts for 4% of the atmosphere at most. Water vapor only accounts for 0.001% of the total global water volume. Water vapor is a gas with the largest concentration change in the atmosphere. Water vapor plays a very important role in the environment, meteorology, climate and military fields. Most of the water vapor is concentrated in the lower layer, half of the water vapor is concentrated below 2 kilometers, and three-quarters...

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a micro-pulse differential absorption laser radar water vapor time-space distribution automatic continuous detection device, which realizes automatic continuous detection of water vapor time-space distribution with high time resolution, high spatial resolution and high precision; innovatively uses The wide-bandwidth laser light source detects the water vapor absorption peak spectral line, and combines the micro-pulse lidar technology and the differential absorption lidar technology to realize the day and night detection of the temporal and spatial distribution of water vapor, which solves the problem of detection caused by too narrow water vapor absorption spectral line. The accuracy is poor, the laser center wavelength drift is not conducive to water vapor detection, the lidar water vapor detection calibration is difficult, and the lidar is difficult to detect water vapor during the day

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