Water surface rainfall intensity measurement method based on rain sound spectrum and device thereof
A technology of rainfall intensity and measuring devices, which is applied in measuring devices, rainfall/precipitation gauges, meteorology, etc., and can solve problems such as being susceptible to noise pollution and multi-value
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[0082] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.
[0083] see figure 1 , in order to invert and calculate the rainfall intensity on the water surface from the rain sound spectrum, it is necessary to match the rainfall rate corresponding to different water sound spectra. The matching analysis process is mainly based on time synchronization matching. Through matching, we can clearly understand the characteristics of the acoustic spectrum produced in the water by the measured surface rainfall process. exist figure 1 In the above, the sound spectrum with a rainfall rate of 0mm / h is measured during non-rainfall periods, and its spectral level values in the entire frequency band (2-30kHz) are lower than those during rainy periods; When the intensity reaches 0.3mm / h (equivalent to the drizzle process), the spectral level of the higher frequency band (>10kHz) in the underwater sound spectrum increases by 3...
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