US 12,240,433 B2
Method for estimating the water level on a roadway when a tire is running
Remi Cote, Clermont-Ferrand (FR); and Florian Bremond, Clermont-Ferrand (FR)
Assigned to COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
Appl. No. 17/631,665
Filed by COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
PCT Filed Jul. 20, 2020, PCT No. PCT/FR2020/051306
§ 371(c)(1), (2) Date Jan. 31, 2022,
PCT Pub. No. WO2021/019148, PCT Pub. Date Feb. 4, 2021.
Claims priority of application No. 1908820 (FR), filed on Aug. 1, 2019.
Prior Publication US 2022/0274568 A1, Sep. 1, 2022
Int. Cl. B60W 40/06 (2012.01); B60T 8/172 (2006.01); G01B 17/02 (2006.01)
CPC B60T 8/1725 (2013.01) [B60W 40/06 (2013.01); G01B 17/02 (2013.01); B60T 2210/13 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for estimating a water height on a roadway where a tire is running, wherein a mounted set is assembled onto a vehicle and placed in a wheel arch of the vehicle, the method comprising the following steps:
fixing a sensor onto the vehicle;
obtaining a frequency signal, which is a signal corresponding to measurements of sound in terms of frequencies thereof, from the sensor corresponding to the running of the vehicle at running speed V on the roadway covered with water;
isolating a part of the frequency signal, bounded by two frequencies F1 and F2, F1 being lower than F2, which is sensitive to the water height;
determining an energy vector linked to the part of the frequency signal, such that the energy vector comprises an integral function of a power spectral density over either the part of the frequency signal or a rectified frequency signal, wherein the integral function is an indicator of acoustic energy associated with a frequency band of a sound response; and
obtaining the water height on the roadway using a function taking account of the energy vector and the running speed V of the vehicle, wherein the water height is determined as a bilinear function of parameters for the running speed V and the energy vector associated with the sound response of the vehicle,
wherein the sensor is a microphone, and
wherein the frequency signal extends in total beyond 4 kHz.