US 12,345,602 B2
Abnormal noise analysis device and method
Shingo Miyai, Okazaki (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Sep. 22, 2022, as Appl. No. 17/950,588.
Claims priority of application No. 2021-200765 (JP), filed on Dec. 10, 2021.
Prior Publication US 2023/0184626 A1, Jun. 15, 2023
Int. Cl. G01M 17/007 (2006.01); G01M 13/028 (2019.01); G06F 3/147 (2006.01); G06T 11/20 (2006.01)
CPC G01M 17/007 (2013.01) [G01M 13/028 (2013.01); G06F 3/147 (2013.01); G06T 11/206 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An abnormal noise analysis mobile terminal that analyzes a cause of an abnormal noise generated in a vehicle based on data on noise emitted from the vehicle and a predetermined rotation speed of the vehicle, the abnormal noise analysis mobile terminal comprising:
a central processing unit configured to:
activate an abnormal noise analysis application including instructions for execution on the abnormal noise analysis mobile terminal;
connect the abnormal noise analysis mobile terminal to an electronic control unit of the vehicle in response to activating the abnormal noise analysis application;
receive a selection of a button on a display panel that causes operation of the vehicle;
operate, in response to the selection, the vehicle to reproduce a driving state in which the abnormal noise is generated;
in response to operating the vehicle to reproduce the driving state in which the abnormal noise is generated, acquire a relationship among time, frequency, and acoustic pressure from the data on noise and to extract a distinctive frequency from the acquired relationship among time, frequency, and acoustic pressure at predetermined time intervals;
based on specifications of the vehicle and the rotation speed and for each of a plurality of phenomena each of which generates an abnormal noise, to acquire a relationship between time and frequency of a related rotating element and to set a frequency range that is based on the acquired relationship between time and frequency and configured to extract, from the phenomena, the phenomenon having the corresponding frequency range that includes a relatively long period of time during which the distinctive frequency occurred; and
the display panel configured to display the phenomenon extracted by the central processing unit and to superimpose the frequency range corresponding to the phenomenon extracted by the central processing unit on the relationship among time, frequency, and acoustic pressure acquired by the central processing unit.