Valeo Schalter Und Sensoren Gmbh

Fabian Haag

Michael Hallek

Oliver Eidel

Hans Wilhelm Wehling

Stefan Triebl

Maximilian Poepperl

Bastian Hafner

Denis Aschkenasi

Raghavendra Gulagundi

Paul Bou-Saleh

Nicolas Bellaize

Paul Bou Saleh

The invention relates to an ultrasonic sensor () having an improved structural dynamic for a motor vehicle (). The ultrasonic sensor () comprises: a plastic housing (), a membrane assembly () arranged in a housing opening () of the plastic housing (), the membrane assembly having an ultrasonic membrane (), and a decoupling element () which is arranged between an inner surface () of the plastic housing () and the membrane assembly (). A plurality of ribs () are formed at the inner surface () of the plastic housing (), on which the decoupling element () rests against, and the ribs () are designed in such a way that the decoupling element () does not rest against the entire inner surface () of the plastic housing ().

Ultrasonic sensor for a motor vehicle, and motor vehicle

Proposed is an ultrasonic sensor system () for a motor vehicle (), comprising an ultrasonic sensor () and a test control device (). The ultrasonic sensor () comprises an electroacoustic converter arrangement () for generating and detecting ultrasonic waves and an electric test device (), which is designed to output an electric test signal to the electroacoustic converter arrangement () and to detect an electric response signal of the electroacoustic converter arrangement () to the electric test signal. The test control device () is designed to detect a characteristic variable of the electric response signal at a plurality of measurement points () by means of the electric test device () by varying a frequency and an amplitude of the electric test signal.

Ultrasonic sensor system for a motor vehicle and method for operating the ultrasonic sensor system

A decoupling element for an ultrasonic sensor is disclosed. The ultrasonic sensor is able to be attached to a flat component for a vehicle. The flat component includes a cutout. The ultrasonic sensor includes a cylindrical ultrasonic transceiver element which is able to be introduced into the cutout. The decoupling element includes a hollow-cylindrical element for enclosing the cylindrical ultrasonic transceiver element of the ultrasonic sensor and a plurality of support ribs which are arranged in the radial direction outside the hollow-cylindrical element and are spaced apart from one another in a circumferential direction of the hollow-cylindrical element for supporting the decoupling element on a region of the flat component outside the cutout when the cylindrical ultrasonic transceiver element with the hollow-cylindrical element enclosing it is introduced by an end portion at an axial end into the cutout.

Decoupling element for an ultrasonic sensor

An ultrasonic transceiver () for a vehicle comprises a plastics housing (), an ultrasonic diaphragm (), a sound transducer element () for stimulating vibrations and detecting vibrations of the ultrasonic diaphragm (), and an electrically conductive contact element (), arranged in the interior () of the plastics housing (), for making electrical contact with the sound transducer element (), wherein the plastics housing () and the contact element () are directly and positively connected to one another by caulking of at least one plastics element () that is formed in one piece with the plastics housing ().

Ultrasonic transceiver and production method for same

The invention relates to a method for determining a functional status of an ultrasonic sensor () of an ultrasonic sensor device () for a motor vehicle (), which is designed to emit an ultrasonic signal () into an environment () of the motor vehicle () and/or to receive an echo signal () of the ultrasonic signal (), wherein an electrical test signal (P) is generated, which is applied to the ultrasonic sensor (), wherein at least one electrical characteristic parameter (K) of the ultrasonic sensor () affected by the electrical test signal (P) is evaluated and as a function thereof a transfer function () of the ultrasonic sensor () is determined, which is compared with a reference transfer function () and the functional state of the ultrasonic sensor () is determined depending on the comparison.

Method for determining a functional status of an ultrasonic sensor by means of a transfer function of the ultrasonic sensor, ultrasonic sensor device and motor vehicle

A method and an analysis system for determining a state of a diaphragm of an ultrasound sensor during operation is disclosed. The diaphragm of the ultrasound sensor is excited with a first excitation signal in a predefined first frequency profile. Based on this, a first voltage profile, which depends on a frequency of the first excitation signal, is measured. Analogously, a second voltage profile is determined by applying a second excitation signal to the diaphragm and then carrying out a measurement. These two voltage profiles are shifted so that respective positions of maxima of the two voltage profiles are matched to each other in a predefined frequency range. A third voltage profile, which runs between the shifted first and second voltage profiles, is determined. Based on the third voltage profile, electrical parameters are determined by a model for continuous excitation of the diaphragm to determine the state of the diaphragm.

Method and analysis system for determining a state of a diaphragm of an ultrasound sensor

The invention relates to a method for operating an ultrasonic sensor () of a vehicle (), in which a sound transducer element () of the ultrasonic sensor () is excited with a predetermined excitation signal, wherein the excitation signal has a predetermined current amplitude, an electrical test voltage (U) at the sound transducer element () resulting from the excitation signal is measured, and a diagnosis of the ultrasonic sensor () is carried out on the basis of the test voltage (U), wherein the ultrasonic sensor () is excited with the excitation signal in a measuring mode for the transmission of an ultrasonic signal, the electrical test voltage (U) is measured during the transmission, on the basis of the electrical test voltage (U) a reduced diagnosis is carried out, wherein the ultrasonic sensor () either continues to be operated in the measuring mode or is operated in a diagnostic mode for a complete diagnosis, depending on a result of the reduced diagnosis.

Method for operating an ultrasonic sensor of a vehicle with reduced diagnostics in a measuring mode of the ultrasonic sensor, and ultrasonic sensor device

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Bietigheim-Bissingen, Germany

Fabian Haag