EP0940801B1 - Transducteur ultrasonore muni d'une pièce moulée de centrage - Google Patents

Transducteur ultrasonore muni d'une pièce moulée de centrage Download PDF

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Publication number
EP0940801B1
EP0940801B1 EP99103792A EP99103792A EP0940801B1 EP 0940801 B1 EP0940801 B1 EP 0940801B1 EP 99103792 A EP99103792 A EP 99103792A EP 99103792 A EP99103792 A EP 99103792A EP 0940801 B1 EP0940801 B1 EP 0940801B1
Authority
EP
European Patent Office
Prior art keywords
ultrasonic transducer
foam
foam molding
ultrasound transducer
transducer device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99103792A
Other languages
German (de)
English (en)
Other versions
EP0940801A3 (fr
EP0940801A2 (fr
Inventor
Rudolf Dipl.-Phys. Thurn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0940801A2 publication Critical patent/EP0940801A2/fr
Publication of EP0940801A3 publication Critical patent/EP0940801A3/fr
Application granted granted Critical
Publication of EP0940801B1 publication Critical patent/EP0940801B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/004—Mounting transducers, e.g. provided with mechanical moving or orienting device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
    • B06B1/0644—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element
    • B06B1/0662—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element with an electrode on the sensitive surface
    • B06B1/067—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element with an electrode on the sensitive surface which is used as, or combined with, an impedance matching layer

Definitions

  • the invention relates to an ultrasonic transducer device with a piezoceramic disc and a matching layer disc having ultrasonic transducer, the partial embedded in a housing using a polymer foam is.
  • a generic ultrasonic transducer device is from the DE 33 01 848 C2 and DE 37 34 070 C2 are already known. Here are driven or to embed the ultrasonic transducer syntactic foams used. Embedding the ultrasonic transducers has three main functions. It should have a precise and reliable mechanical Bracket of the ultrasonic transducer, a mechanical one Damping effect as well as a visually appealing and opposite Insensitive converter visible surface reached become. The mechanical damping effect takes place in the way that the transducer vibration to achieve high acoustic Sensitivity moderately dampened and reproducible becomes.
  • the invention has for its object the above Improve ultrasonic transducer device in such a way that the ultrasonic transducer is centered in a simple manner and at the same time a visually appealing, void-free viewing area is guaranteed.
  • the object is achieved in that the adapter layer disc centered on its peripheral surface by a foam molding is.
  • Foam molded parts are dimensionally accurate and inexpensive, for example by punching out of foam sheets to let.
  • the use of such prefabricated and thus pre-testable centering moldings on the converter face enables series production with very simple and inexpensive devices while minimizing of the committee due to optical defects on the visible surface.
  • Modern foams e.g. various cellular rubber materials, Are polyethylene or polyurethane foams mechanically robust and resistant to climatic and chemical influences.
  • An advantageous development of the invention consists in that the foam molding is designed as a ring on which the circumferential surface of the adapter layer disc rests. This is a very simple and stable in terms of shape Execution of the foam molding.
  • the foam molding is made of a closed cell foam Structure is made. Otherwise it is not to be excluded that when potting the ultrasonic transducer small amounts of pourable foam mass in the cell structure penetrate and thereby harden what vibration damping very adversely affected.
  • the ultrasonic transducer 1 shows an ultrasonic transducer device with a Ultrasonic transducer, which is essentially a matching layer disc 1 and a piezoceramic disk 2.
  • the ultrasonic transducer 1, 2 here is formed by a centering ring 4 Centered foam molding that is flush with the Transducer visible surface and a cylindrical housing 3 completes.
  • the ultrasound transducer is in the interior of the housing 3 1,2 embedded in a foam 5, so that a positive and non-positive mechanical mounting of the ultrasonic transducer 1.2 in the housing 3 results.
  • the foam molding 4 guarantees a flawless, void-free Visible surface. Because of the sealing effect of the foam molding 4 can be potted with the foam 5 practically without any device effort can be carried out.
  • the further exemplary embodiment according to FIG. 2 shows a minor one Modification of the exemplary embodiment according to FIG. 1.
  • This consists in the fact that a further foam molded part 6 as an elastic spacer and sealing ring between the Front surface of the ultrasonic transducer 1,2 and here on the Front 3 inwardly projecting housing 3 is used.
  • the foam molding 6 is largely covered by the protrusion of the housing 3, whereby a protective function against mechanical influences is.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Measuring Volume Flow (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Claims (4)

  1. Dispositif à transducteur ultrasonore comportant un transducteur ultrasonore qui comporte une galette piézocéramique (2) et une galette de couche d'adaptation (1) et qui est partiellement encastré dans un boítier (3) au moyen d'un polymère alvéolaire (5), caractérisé par le fait que la galette de couche d'adaptation (1) est centrée au niveau de sa surface circonférentielle par une partie moulée en mousse (4).
  2. Dispositif à transducteur ultrasonore selon la revendication 1, caractérisé par le fait que la partie moulée en mousse est conçue comme un anneau (4) sur lequel s'appuie la surface circonférentielle de la galette de couche d'adaptation (1).
  3. Dispositif à transducteur ultrasonore selon la revendication 1, caractérisé par le fait que la partie moulée en mousse (4) se termine à fleur de la surface de rayonnement d'ondes ultrasonores de la galette de couche d'adaptation (1).
  4. Dispositif à transducteur ultrasonore selon l'une des revendications précédentes, caractérisé par le fait que la partie moulée en mousse (4) est fabriquée à partir d'une mousse ayant une structure à alvéoles fermés.
EP99103792A 1998-03-04 1999-02-26 Transducteur ultrasonore muni d'une pièce moulée de centrage Expired - Lifetime EP0940801B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19809206A DE19809206C2 (de) 1998-03-04 1998-03-04 Ultraschallwandlereinrichtung mit Zentrier-Formteil
DE19809206 1998-03-04

Publications (3)

Publication Number Publication Date
EP0940801A2 EP0940801A2 (fr) 1999-09-08
EP0940801A3 EP0940801A3 (fr) 2001-06-20
EP0940801B1 true EP0940801B1 (fr) 2004-01-21

Family

ID=7859664

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99103792A Expired - Lifetime EP0940801B1 (fr) 1998-03-04 1999-02-26 Transducteur ultrasonore muni d'une pièce moulée de centrage

Country Status (2)

Country Link
EP (1) EP0940801B1 (fr)
DE (2) DE19809206C2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19957125A1 (de) * 1999-11-26 2001-06-21 Siemens Ag Ultraschall-Wandler
DE102018005540B4 (de) 2018-07-13 2022-06-09 Pepperl+Fuchs Ag 1D-Ultraschallwandler-Einheit
DE102018006139B3 (de) * 2018-08-03 2019-06-19 Pepperl+Fuchs Gmbh 1D-Ultraschallwandler-Einheit für die Bereichsüberwachung
DE102018006127B4 (de) * 2018-08-03 2021-07-08 Pepperl+Fuchs Ag 1D-Ultraschallwandler-Einheit für die Materialerfassung
DE102018006130B3 (de) 2018-08-03 2019-08-08 Pepperl + Fuchs Gmbh 1D-Ultraschallwandler-Einheit zur Gefahrenerkennung für ein Fahrzeug
DE102022200918B3 (de) 2022-01-27 2023-04-27 Vitesco Technologies Germany Gmbh Verfahren zum Herstellen eines Ultraschallsensors und Ultraschallsensor

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3234896A1 (de) * 1982-09-21 1984-03-22 Siemens AG, 1000 Berlin und 8000 München Ultraschallwandler
DE3301848C2 (de) * 1983-01-20 1984-11-08 Siemens AG, 1000 Berlin und 8000 München Ultraschallwandler
DE3734070A1 (de) * 1987-10-08 1989-04-20 Siemens Ag Syntaktischer daempfungsschaum
DE3823477A1 (de) * 1988-07-11 1990-01-18 Siemens Ag Verfahren zur fertigung von ultraschall-wandlern
EP0498015B1 (fr) * 1991-02-07 1993-10-06 Siemens Aktiengesellschaft Procédé de fabrication de transducteurs ultrasonores
DE4323134C1 (de) * 1993-07-10 1994-06-16 Pil Sensoren Gmbh Ultraschallschwinger

Also Published As

Publication number Publication date
DE19809206C2 (de) 2001-02-15
EP0940801A3 (fr) 2001-06-20
DE19809206A1 (de) 1999-09-23
EP0940801A2 (fr) 1999-09-08
DE59908332D1 (de) 2004-02-26

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