Ultrasonic sensor assembly for a motor vehicle, and motor vehicle
AssigneeValeo Schalter und Sensoren GmbH
InventorSylvio Salomon
Life of this patent
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Abstract
An ultrasonic sensor assembly (1) for a motor vehicle (16) comprises: an ultrasonic sensor (2) having a housing (4), an ultrasonic membrane (5) mechanically decoupled from the housing (5) and a sound transducer element (7) for exciting vibrations and detecting vibrations of the ultrasonic membrane (5); and a screen section (3) arranged in front of the ultrasonic membrane (5) and made of an acoustic metamaterial. The metamaterial is preferably a broadband metamaterial, which can be tunneled in a non-resonant manner in an angular range. The screen section (3) may preferably be formed in a shaped part (13), such as a bodywork metal sheet of the exterior skin or an interior paneling, of the motor vehicle (16).
Claims16
An ultrasonic sensor assembly for a motor vehicle, comprising:
- an ultrasonic sensor having a housing;
- an ultrasonic membrane mechanically decoupled from the housing;
- a sound transducer element for exciting first ultrasonic waves vibrations and detecting second ultrasonic waves through vibrations of the ultrasonic membrane, wherein the first ultrasonic waves and the second ultrasonic waves have a frequency at or above 40 kilohertz;
- and a screen section arranged in front of the ultrasonic membrane and made of an acoustic metamaterial;
- wherein the acoustic metamaterial is formed from an acoustic base material in which a lattice of a plurality of through-openings is formed.
Dependencies are inferred from the claim text.