Publications

주행 차량의 엔진음을 이용한 속력 분석
Year 2022
Month
Journal 2022 / 한국자동차공학회논문집 vol. 30, no. 2, pp. 91-98
Author 최영수, 공승현
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Vehicle speed at the time of an accident has a significant impact on the reliability of the reconstruction of the
traffic accident. Recently, vehicle speed analysis methods, based on acoustic data from cameras, have been studied to
overcome the limitation of image data due to blind spots and environmental conditions. In this paper, we proposed a speed
analysis technique based on external noise and the Doppler effect generated by a moving vehicle. In particular, the frequency
of vehicle engine sound was analyzed by using STFT, and the speed of the vehicle with respect to time was estimated by
correcting the two-dimensional Doppler effect. Finally, the reliability of the proposed method was verified through acoustic
simulation by using Matlab and actual vehicle evaluation by using acoustic data from dashboard cameras. Therefore, the
proposed technique that utilizes acoustic data from cameras under limited conditions could estimate the speed of the vehicle
in an accident.