Novel parabolic antenna, acoustic radar system for detecting water vapor transfer channel and rainfall predicting method

Abstract

The invention provides a novel parabolic antenna, an acoustic radar system for detecting a water vapor transfer channel and a rainfall predicting method. The parabolic antenna comprises a parabolic reflector, a support, a receiving transducer, an acoustic loudspeaker and an acoustic tube, the receiving transducer, the acoustic loudspeaker and the acoustic tube are sequentially installed in the axis direction of the front face of the parabolic reflector, the end of the support is connected to the parabolic reflector, the receiving transducer is arranged facing the parabolic reflector, and the acoustic loudspeaker is arranged back on to the parabolic reflector. Acoustic waves are directly emitted after being amplified and guided through the acoustic tube instead of using an antenna for emitting the acoustic waves, the use efficiency of the acoustic waves and the detectivity of an acoustic radar can be effectively promoted, weak echo signals of the water vapor transfer channel can be detected, and accurate sampling data can be provided for predicting 24-h rainfall. The accuracy of predicting 24-h rainfall can be substantially improved by detecting the state of the water vapor transfer channel.

Description

technical field [0001] The invention relates to a novel parabolic antenna, a sodar system for detecting water vapor conveying channels and a method for predicting rainfall. Background technique [0002] Sodar is a device that uses the principle of radar to emit sound waves and receive the backscattered echoes of the sound waves to measure the echo intensity and the distance to the target. The frequency range of sodar sending and receiving sound waves can cover infrasonic waves, sound waves, and ultrasonic waves. Sodar used in the meteorological field is mainly used for atmospheric wind field monitoring and wind power resource assessment. [0003] As an important part of sodar, the antenna directly affects the detection accuracy and distance of sodar. The traditional sodar uses a shared antenna for sending and receiving, and the acoustic horn is set in the same direction as the receiving transducer. The advantage is that it can reduce costs and is mostly used to detect atmo...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a new type of parabolic antenna, a sodar system for detecting water vapor transmission channels and a method for predicting rainfall to solve the problem of relatively insufficient detection ability in the prior art, and it is impossible to detect the weak water vapor transmission channels in the atmosphere. echo signal problem

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