Precipitation measurement method and device based on dual-polarization information

Abstract

The invention provides a precipitation measurement method and device based on dual-polarization information, and the method comprises the steps: transmitting orthogonal electromagnetic waves to a precipitation region through a dual-polarization radar sensor, and receiving an echo signal containing dual-polarization information; calculating echo signal power and power spectrum distribution of precipitation particles, and classifying precipitation through the acquired dual-polarization information; when the dual-polarized radar sensor points to the sky in a vertical or non-vertical range, calculating the rainfall intensity; and carrying out time integration on the precipitation intensity to obtain precipitation. The volume of the sensor is reduced, precipitation is classified by using dual-polarization information while precipitation measurement is performed, the sensitivity and the time resolution are high, the sensor does not need to keep vertically pointing to the sky, and the wind resistance is high.

Description

technical field [0001] The invention belongs to the field of meteorological detection, in particular to a method and device for measuring precipitation based on dual polarization information. Background technique [0002] Precipitation observation is an important part of hydrological and meteorological monitoring. It plays an important role in atmospheric water cycle monitoring, disaster prevention and mitigation, and people's production and life. With the expansion of automation technology application fields, the demand for precipitation measurement has expanded from traditional meteorological and hydrological observations to agriculture. , autonomous driving, engineering construction and other fields. Precipitation includes rain, snow, hail, etc. Due to the complexity of the weather, it is very important to accurately observe the precipitation of a single type of precipitation and mixed types of precipitation. Commonly used precipitation measurement devices are rain gauges...

AI Technical Summary

Problems solved by technology

However, in the existing technology, the traditional precipitation measurement device needs to point vertically to the sky, which can only be applied to fixed places, and the application scenarios are greatly limited.

And in the field of precipitation measurement, the existing radar antennas are mostly designed to be conical due to the existence of parabolic reflectors, which greatly increases the volume of the antenna and limits the installation environment

[0004] To sum up, the common problems of current precipitation measurement devices are large sensor volume, easy pollution, long response time, weak precipitation classification ability, and must point vertically to the sky, etc.

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