Multi-view-field laser radar detection system and method for liquid water cloud measurement

Abstract

The invention discloses a multi-view-field radar detection system and method for liquid water cloud measurement. The multi-view-field radar detection system comprises a laser radar transmitting module, a laser radar receiving module and a main control module, wherein the laser radar transmitting module comprises a laser, a beam expander, a polarizer and a half wavelength plate; the laser radar receiving module comprises a telescope, a convex lens, an electric aperture, a polarization beam splitter, a first photoelectric detector, a second photoelectric detector and a signal acquisition module; and the laser, the electric aperture and the signal acquisition module are connected with the main control module, and the first photoelectric detector, and the second photoelectric detector are connected with the signal acquisition module. The multi-view-field laser radar detection method comprises the steps of generating laser radiation with the wavelength of 532nm by using a laser, detecting parallel polarized light and vertical polarized light respectively through two optical receiving channels such as a parallel detection channel and a vertical detection channel, calculating a depolarization ratio through the two detection channels, and calculating the liquid water content and the effective particle radius by using the slope of the depolarization ratio and the polarization saturation.

Description

technical field [0001] The invention relates to a multi-field laser radar detection system and method for liquid water cloud measurement, in particular to a multi-field laser radar detection system and method for measuring the microphysical characteristics of cloud particles in clouds, which belongs to cloud particle detection technology field. Background technique [0002] When analyzing weather factors, the composition and characteristics of cloud particles are important indicators for predicting future weather development trends. Real-time monitoring of cloud particles is more helpful for analyzing atmospheric movement. The observation results are useful for short-term weather forecasts. profound meaning. For the study of long-term climate, clouds have a radiation effect and affect the climate change of the entire earth. The influence of clouds on temperature even exceeds the influence of carbon dioxide on temperature by three times. To study the model, the physical pro...

AI Technical Summary

Problems solved by technology

However, the traditional laser radar can only measure the laser radar echo under a single field of view. According to the Mie scattering theory, the laser radar echo with a single field of view cannot reflect the scale spectrum information of cloud particles. Therefore, the multi-field laser radar It is of great significance to study the microphysical parameters of clouds

Images