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Converter arrangement for capturing sound waves and/or pressure waves by means of fiber-optic sensor

An optical fiber sensor and transducer technology, which is applied in the field of transducer devices for detecting acoustic waves and/or pressure waves, can solve the problems of impact of acoustic transducer impact performance, impact on acoustic transducer, low mechanical robustness, etc.

Active Publication Date: 2014-08-13
ROBERT BOSCH GMBH
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  • Abstract
  • Description
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Problems solved by technology

However, acoustic transducers are often installed visibly in bumpers, in particular of motor vehicles, wherein these acoustic transducers are affected in terms of their crash behavior
Furthermore, an acoustic transducer arranged in this way is only protected against environmental influences, such as moisture, by a thin membrane, which has a low mechanical robustness
Cracks can develop in the diaphragm due to mechanical action or vibration, so that moisture can penetrate and negatively affect the acoustic transducer

Method used

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  • Converter arrangement for capturing sound waves and/or pressure waves by means of fiber-optic sensor
  • Converter arrangement for capturing sound waves and/or pressure waves by means of fiber-optic sensor
  • Converter arrangement for capturing sound waves and/or pressure waves by means of fiber-optic sensor

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Embodiment Construction

[0037] figure 1 The structure of a fiber optic sensor 10 with a light source 12 and a light detection unit 14 is schematically shown. Fiber optic sensor 10 is arranged or embedded or placed and fixed in carrier material 16 . The carrier material 16 is provided by a plate of a suitable material or by a suitable section of an additional profiled part. At the incoupling 18, light is guided from the light source 12 into one end of the optical fiber 20 of the fiber optic sensor 10, wherein the light is guided through the optical fiber 20 of the optical fiber sensor 10 and finally reaches the other end of the optical fiber 20 with residual intensity The part reaches the outcoupling part 22. There, for example, the light intensity can be measured by the light detection unit 14 . A first linear polarization filter and a second linear polarization filter 24 , 26 can each be provided on the coupling-in 18 and on the coupling-out 22 , which are aligned identically. If the optical fib...

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Abstract

The invention relates to a converter arrangement for capturing sound waves and / or pressure waves by means of a fiber-optic sensor, a light source and a light detection unit, wherein the light source is coupled on one end at least to an optical fiber and the light detection unit on another end of the at least one optical fiber, and the at least one optical fiber can be integrated into a section of a motor vehicle component that can be activated by sound and / or pressure waves.

Description

technical field [0001] The invention relates to a transducer device for detecting sound waves and / or pressure waves, said transducer device comprising a fiber optic sensor integrated in a motor vehicle accessory, said fiber optic sensor integrated in a in the section. Background technique [0002] Sensors operating according to different measuring principles are known in vehicle technology and are used not only as components in safety devices but also as components in environment recognition systems. A distinction is made between sensors for detecting collisions or the associated deformations of motor vehicle accessories and sensors that operate without contact and without wear. [0003] For detecting frontal, side and / or rear collisions, fiber optic sensors are used, for example. The function of such an optical fiber sensor arranged in the sensitive region is based on the incoupling of light into one end of the optical fiber and outcoupling at a second end, wherein the de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H9/00B60R19/48B60R21/0134G01D5/353G01S15/93G01S7/521
CPCG01D5/35341G01S7/521G01D5/35374G01H9/004
Inventor D·巴尔特伊拉T·朔伊尔勒
Owner ROBERT BOSCH GMBH
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