Method, apparatus, and computer program for estimating speed of vehicle passing over horizontally grooved road by using acoustic analysis
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United States of America Patent
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Oct 27, 2020
Grant Date -
May 9, 2019
app pub date -
Aug 23, 2018
filing date -
Nov 6, 2017
priority date (Note) -
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Abstract
Provided is a method of estimating a speed of a vehicle includes obtaining time domain acoustic data from an acoustic storage apparatus when the vehicle passes over a horizontally grooved road; calculating frequency domain acoustic data from the time domain acoustic data by using Fourier transformation; calculating, from the frequency domain acoustic data, a resonance frequency of sound generated between tires of the vehicle and horizontal groovings in the road; and estimating the speed when the vehicle passes over the horizontally grooved road by multiplying the resonance frequency by an interval of the horizontal groovings.
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