Method and device for recognizing supercooled water

Abstract

The invention relates to a method and a device for recognizing supercooled water. The method comprises steps: a membership function is built, and multiple measurement parameters in need of measurement are determined; the multiple measurement parameters are measured respectively through a millimeter-wave cloud radar, and multiple measurement values are obtained; the multiple measurement values serve as input parameters for the membership function respectively, multiple memberships are calculated and obtained, the phase state of a cloud particle is determined according to the multiple memberships, and the phase state membership in each phase state is calculated and obtained; the sizes of obtained phase state memberships in all phase states are compared, and a judgment result is obtained; and the judgment result is processed according to the supercooled water definition, and a supercooled water recognition result is obtained. According to the method and the device for recognizing the supercooled water, the recognition process is simple, convenient and easy to realize and is not limited by an observation condition, the recognition speed is quick, and the practicability is strong.

Description

technical field [0001] The invention relates to the field of radar technology, in particular to a method and device for identifying supercooled water based on millimeter-wave cloud radar. Background technique [0002] Water that remains liquid below 0°C is called supercooled water. Supercooled water is a special phase state of liquid droplets in clouds. Therefore, identifying supercooled water in clouds requires the use of cloud phase recognition technology. Supercooled water is closely related to aviation, meteorology, electric power and other industries. For example, if there are supercooled water droplets in the high-altitude atmosphere, it is a huge safety hazard for aircraft flight; Operational efficiency; the power sector also needs to understand the distribution of supercooled water in the cloud to prevent freezing rain disasters from threatening power transmission facilities. Therefore, it is necessary to use the cloud phase identification technology to judge the di...

AI Technical Summary

Problems solved by technology

Nanjing University of Information Science and Technology used the observation data of the airborne cloud particle measurement system in the Sanjiangyuan area to analyze the vertical and horizontal microphysical structure characteristics of the multi-layered stratiform cloud system in autumn, researched new methods and distinguished the phase state of stratus cloud particles at each height, which can effectively distinguish cloud in supercooled water, but the detection method is limited by the observation conditions

PLA University of Science and Technology based on the principle of space-borne polarized lidar cloud phase identification, using support vector machine to build a cloud phase (including supercooled water) identification model combined with CloudSat and CALIPSO satellite data and carried out an example inversion verification, but the attenuation of lidar Observational applications are affected by weather and attenuation, so this method has certain limitations

The above analysis shows that although relevant research institutions at home and abroad have proposed many supercooled water identification methods, they still only stay in superficial academic research, cannot be widely applied, and have poor practicability

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