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Ultrasonic transducer used in fluid medium

A fluid medium and transducer technology, applied in piezoelectric/electrostrictive transducers, sound-generating devices, fluid velocity measurement, etc., can solve problems such as signal errors

Inactive Publication Date: 2011-05-18
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in sensor devices with several ultrasonic transducers, the ultrasonic path can have side effects on the individual ultrasonic transducers, which can lead to signal errors

Method used

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  • Ultrasonic transducer used in fluid medium
  • Ultrasonic transducer used in fluid medium
  • Ultrasonic transducer used in fluid medium

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Embodiment Construction

[0041] As mentioned above, reference is largely made to the prior art with regard to possible ultrasonic transducers, wherein the ultrasonic transducers described there can be modified by adding a damping element according to the invention. figure 1 A side view of an exemplary embodiment of an ultrasonic transducer 110 is shown in section. Ultrasonic transducer 110 has no external damping elements and thus represents only a preliminary stage for the production of ultrasonic transducer 110 according to the invention. In principle, however, other ultrasonic transducers 110 can also be retrofitted according to the invention.

[0042] Ultrasonic transducer 110 includes a housing sleeve 112 with a housing interior 114 . The housing sleeve 112 can be produced, for example, from a plastic material, in particular a hard plastic material or a metallic material. In the example shown, the housing sleeve 112 has the shape of a pot, which is provided with a housing opening 116 which, whe...

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Abstract

The invention presents an ultrasonic transducer (110) used in fluid medium (118). The ultrasonic transducer (110) comprises at least one casing cover (112) with at least one casing cavity (114), in which at least one transducer core (124) is installed. The transducer core (124) comprises at least one acoustic-electro transducer element (126). At least one damping element (156) is in contact with the casing cover (112), and is equipped at an outer side of the casing cavity (114) for damping solid state sound.

Description

Background technique [0001] Ultrasonic transducers for various fields of application are known from the prior art. Ultrasonic transducers are used in fluid media, for example, to measure liquid levels and / or fluid properties, such as mass flow or volume flow or velocity of the fluid medium. Such ultrasonic transducers are used in particular in intake and / or exhaust tracts of internal combustion engines. Examples of such ultrasonic transducers are described in DE 203 02 582 U1, EP 0766 071 A1 or DE 10 2007 010 500 A1, which can also be modified according to the invention within the scope of the invention. [0002] An ultrasonic transducer usually has at least one electro-acoustic transducer element, for example a piezoelectric transducer element, which is provided to convert an electrical signal into an ultrasonic signal or vice versa. Ultrasonic transducers based on piezoceramics are known from the prior art, as described, which can additionally comprise at least one impedan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R17/00G01F23/296G01F1/66G01P5/24
CPCG01F1/662G01F1/667G01F23/2968G10K9/22G10K9/122
Inventor R·米勒G·许弗特勒M·霍斯特布林克T·朗S·拉德万B·金茨尔R·万贾
Owner ROBERT BOSCH GMBH
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