Detecting objects in the environment surrounding a vehicle by detecting an acoustic signal impinging thereon from a predetermined direction using a sensor 20, analyzing a sensor output signal (e.g. by auto-correlation or cross-correlation) relative to comparable features and, in the event of a potential collision between the vehicle and object, providing a warning to the vehicle driver, actively acting on the vehicle dynamics or activating anti-collision functions. The detected signal comprises either intrinsic noise generated by the own-vehicle or external noise from the environment. The system may use control data from the vehicle such as vehicle speed or engine speed. The sensor may comprise an electro-acoustic transducer 10 wherein a diaphragm 11 is surrounded by a heavier core housing 15 which is in turn embedded in a sound damping medium 15 within housing 16. Its directional characteristic may be adjustable by varying the core housing shape.
PROCEDE ET DISPOSITIF POUR SAISIR DES OBJETS DE L'ENVIRONNEMENT D'UN VEHICULE
2018-03-02
Patent
Electronic Resource
French
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