Precipitation measurement method and device based on dual-polarization information

A measurement method and dual-polarization technology, applied in the field of meteorological detection, can solve the problems of large sensor volume, weak precipitation classification ability, limited installation environment, etc., to achieve high sensitivity and time resolution, easy maintenance, and broaden application scenarios. Effect

Active Publication Date: 2020-10-09
PEKING UNIV
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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 exist...

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  • Precipitation measurement method and device based on dual-polarization information

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Embodiment Construction

[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0035] The method for measuring precipitation based on dual polarization information of the present invention includes:

[0036] 1. Emission and reception of electromagnetic waves

[0037] The invention uses a radar sensor to transmit and receive electromagnetic waves, and the radar sensor can point to the sky vertically or to any direction.

[0038] The radar sensor includes a dual-polarization Doppler antenna module, a radio frequency low-noise amplifier and an intermediate frequency preamplifier, which can emit a beam of energy-concentrated orthogonal electromagnetic waves to propagate into spa...

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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...

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Application Information

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IPC IPC(8): G01S13/95G01S7/02
CPCG01S7/02G01S7/024G01S13/95G01S13/956G01S7/027
Inventor 唐继顺刘晓阳
Owner PEKING UNIV
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