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MARINE ENGINE SPEED ESTIMATING DEVICE, MARINE ENGINE SPEED ESTIMATION METHOD, AND MARINE ENGINE SPEED ESTIMATING PROGRAM
MARINE ENGINE SPEED ESTIMATING DEVICE, MARINE ENGINE SPEED ESTIMATION METHOD, AND MARINE ENGINE SPEED ESTIMATING PROGRAM
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机译：海洋发动机速度估计装置，海洋发动机速度估计方法和海洋发动机速度估计程序
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摘要
PROBLEM TO BE SOLVED: To estimate the revolution speed of a propulsion engine with high accuracy from inboard noise.;SOLUTION: A marine engine speed estimating device 1 of an embodiment comprises: a Fourier transform unit 54 for Fourier transforming sound frame data acquired from recorded data in which inboard noise is recorded and thereby generating a sound frame spectrum; an averaging processing unit 56 for generating an average sound frame spectrum from a prescribed number of consecutive sound frame spectrum; a sound volume filter processing unit 57 for estimating the operating frequency band of a propulsion engine 110 on the basis of a sound volume filter and the sound volume of the average sound frame spectrum, and acquiring a transmission spectrum, out of the average sound frame spectrum, that passes through the operating frequency band; a peak extraction unit 58 for extracting one or a plurality of peaks included in the transmission spectrum; and a revolution speed calculation unit 59 for calculating, when the number of extracted peaks is one, the revolution speed of the propulsion engine 110 on the basis of the frequency of the peak.;SELECTED DRAWING: Figure 3;COPYRIGHT: (C)2019,JPO&INPIT
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