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Sensor assembly and method for detecting the surroundings of a vehicle

A technology for sensor devices and surrounding environments, applied in the direction of measurement devices, fluids using vibrations, piezoelectric/electrostrictive devices, etc.

Active Publication Date: 2015-11-18
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This means that additional assembly space is required and additional visible elements must be installed on the vehicle

Method used

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  • Sensor assembly and method for detecting the surroundings of a vehicle
  • Sensor assembly and method for detecting the surroundings of a vehicle
  • Sensor assembly and method for detecting the surroundings of a vehicle

Examples

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Embodiment Construction

[0033] figure 1 An exemplary embodiment for the first sound transducer arrangement 10 is shown schematically in a perspective view. The first sound transducer device 10 comprises a pot-shaped element 11 which can be made of plastic or aluminium, for example. The element 11 comprises a bottom surface 12 designed as a diaphragm 12 and a surrounding edge surface 14 . The bottom surface 12 is substantially circular. Membrane 12 can, for example, be formed in one piece with element 11 or be fastened as a separate part to surrounding edge surface 14 . The edge surface 14 has a circumferential bead 16 in the direction of its edge facing away from the bottom surface 12 . This projection 16 is used to fasten the element 11 in a receptacle of a sensor housing (not shown), for example on a motor vehicle. A piezoelectric element (not shown) is arranged in a known manner on the diaphragm 12 in such a way that it excites the diaphragm 12 to vibrate, thereby enabling the emission of soun...

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PUM

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Abstract

The invention relates to a sensor assembly (1) which comprises a first acoustic transducer assembly (10) having at least one surface formed as a diaphragm (12), the diaphragm (12) being suitable to emit sound waves. An acoustic converter assembly (10) of this type is also designated a flexible resonator and can generate sound waves having a comparatively high acoustic pressure. The sensor assembly (1) according to the invention has a second acoustic transducer assembly (20), comprising a plurality of sensor elements (22a - 22i) which are arranged in an array. Provision is made for the second acoustic transducer assembly (20) to be arranged on a surface of the first acoustic transducer assembly (10) that is formed as a diaphragm (12). According to the invention, the second acoustic transducer assembly (20) comprises sensor elements (22a - 22i) which are formed as electret converter elements. A sensor assembly (1) of this type can be formed in particular as an ultrasound sensor assembly for detecting the surroundings of a vehicle.

Description

Background technique [0001] Ultrasonic sensors (USS) are used today, for example, to support the driver of the vehicle during parking. Here, the USS acts as a transmitter and receiver at the same time. The transmitted ultrasound signal is reflected by the object. The distance to the object is then determined by a travel time calculation. The lateral position of the object is determined by means of triangulation. [0002] Known ultrasonic sensors generally have piezoelectric elements which are connected to the diaphragm of the ultrasonic sensor. By correspondingly actuating the piezoelectric element, the diaphragm of the ultrasonic sensor can be vibrated in order to emit an acoustic signal. In order to receive the reflected signal, the vibration of the diaphragm is converted into a corresponding voltage signal by the piezoelectric element. [0003] In the context of object distance calculations by means of triangulation, inaccuracies in determining the angle of incidence o...

Claims

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Application Information

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IPC IPC(8): B06B1/02G01S15/93G01S15/04H01L41/31H04R19/01
CPCB06B1/0292G01S7/521G01S2015/932H04R19/01H04R2499/13
Inventor D·巴尔特伊拉T·特肋普托D·施密德M·舒曼
Owner ROBERT BOSCH GMBH
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