Water surface rainfall intensity measurement method based on rain sound spectrum and device thereof

Abstract

The invention provides a water surface rainfall intensity measurement method based on rain sound spectrum and a device thereof, relates to water surface rainfall intensity measurement, and specifically provides a water surface rainfall intensity measurement device which is based on a DSP digital acquisition system and has the advantages of high anti-interference, low self noise, high reliability,high bandwidth and data mass memory as well as a method. The device is provided with a gas-tight silo, a gas-tight silo float, a hydrophone, a hydrophone float and a circuit. In the measurement method, frequency range division and shape of underwater rain sound spectrum are adopted in combination with the least square method and the non-linear method to invert water surface rainfall intensity; according to log-linear change principle of the sound spectrum at the frequency range ranging from 15kHz to 30kHz, rainfall is divided into 3 types: no rain, light rain and heavy rain; an S-type growth model is adopted to study the sound spectrum principle in the process of the light rain and quantize rainfall intensity in the process of light rainfall; a log-linear model is adopted to study the sound spectrum principle in the process of heavy rainfall and the low frequency range of 2-10KHz of the rain sound spectrum and parameter value of the log-log model are adopted to quantize the rainfall intensity in the process of the heavy rainfall.

Description

technical field [0001] The invention relates to a measurement of the intensity of rainfall on the water surface, in particular to a method and a device for measuring the intensity of the rainfall on the water surface based on the rain sound spectrum. Background technique [0002] Rainfall is an important climate factor, and rainfall over the sea plays a major role in regional and global heat and water budgets. Climatologists want to capture the intensity of rainfall over the sea to understand the latent heat released by each rainfall. In marine scientific research surveys, corresponding meteorological auxiliary information is generally required. However, because there is no suitable rainfall intensity measuring instrument at sea, the important meteorological element of rainfall intensity is often missing in previous marine surveys. In addition, rain falling on the sea will generate sound in the water and become an important source of noise interference that affects the back...

AI Technical Summary

Problems solved by technology

[0027] Another object of the present invention is to provide a kind of adopting above-mentioned water surface rainfall intensity measurement device, the rainfall intensity of inversion in order to overcome the disadvantages such as having multiple values ​​and being susceptible to noise pollution by using isolated frequency (segment) inversion of rainfall rate in the prior art. It is a water surface rainfall intensity measurement method based on the rain sound spectrum, which has a high accuracy of coincidence with the measured rainfall intensity and can fully reflect the intensity change of the actual rainfall process

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