EP0409007B1 - Transducteur à couche ultrasonore - Google Patents

Transducteur à couche ultrasonore Download PDF

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Publication number
EP0409007B1
EP0409007B1 EP90112871A EP90112871A EP0409007B1 EP 0409007 B1 EP0409007 B1 EP 0409007B1 EP 90112871 A EP90112871 A EP 90112871A EP 90112871 A EP90112871 A EP 90112871A EP 0409007 B1 EP0409007 B1 EP 0409007B1
Authority
EP
European Patent Office
Prior art keywords
current conductor
layered transducer
transducer according
metallized
ultrasonic
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
EP90112871A
Other languages
German (de)
English (en)
Other versions
EP0409007A3 (en
EP0409007A2 (fr
Inventor
Hans-Joachim Burger
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 EP0409007A2 publication Critical patent/EP0409007A2/fr
Publication of EP0409007A3 publication Critical patent/EP0409007A3/de
Application granted granted Critical
Publication of EP0409007B1 publication Critical patent/EP0409007B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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

Definitions

  • the invention relates to ultrasound layer transducers with a piezoceramic, on the two side surfaces of which planking plates are held, at least one of the side surfaces being metallized and between this side surface and the same-sided planking plate being a current conductor which contacts the metallized side surface.
  • Ultrasonic layer transducers of the type mentioned above are known.
  • Strands are usually used here as current conductors, which carry the excitation current when operating as a transmitter and, when used as a receiver, pass on the received signal to a spatially distant supply and processing unit.
  • the manipulation of the ultrasound film converter with strands brings with it manufacturing problems, e.g. lie in the soldering of the strands and the accommodation of the solder joint on the usually thin, breakable piezo foils, and their solution is quite expensive.
  • the piezo foils are clad with matching and / or damping materials so that they fulfill the required acoustic properties.
  • Several such individual systems can be arranged in parallel for some requirements, which further increases the manufacturing problems and the effort.
  • a cost-effective embodiment in which the same type of cladding platelets can be used, is provided if, in addition to the current conductor, a further current conductor is provided and both current conductors are contacted via the side surfaces of the piezoceramic, which are both metallized, with only one current conductor in on each metallized side surface one groove of the side-corresponding cladding plate lies and both grooves are off-center and at the same distance from the closest narrow sides of the cladding plate.
  • the positioning of the current conductor which is retained even when it is pressed by the cladding plate onto the metallized surface of the piezoceramic, can be achieved particularly safely if the groove in the cladding plate has a V-shaped cross section.
  • the V-shaped cross-section By changing the V-shaped cross-section in its angle and depth, it is possible to adapt to the cross-section of the current conductor in a simple manner, so that it protrudes from the groove in the desired manner and necessary for contacting. If the current conductor is designed as a solid conductor, it is easy to use. If the distance between the two current conductors is assigned to a plug system or a hole spacing in printed circuit boards, then the connection to the plug system or to the printed circuit boards can be implemented in a simple manner, for example also by means of an automatic machine. Inexpensive manufacture of the ultrasound film converter, in which the contact pressure on the current conductor described above is also ensured, is provided if its components are at least partially held together by adhesive bonding.
  • the shielding which can be electrical and at the same time can offer mechanical protection, ensures good cohesion of the components of the ultrasound layer transducer, again with the pressure required for contacting on the conductor is guaranteed.
  • FIG. 1 shows an ultrasound layer transducer which has a piezoceramic 2, the two side surfaces of which are metallized. Cladding plates 3 are located on these metallized side surfaces, with which the required acoustic adaptation and damping are brought about. Two solid conductors 1 are partially recessed in grooves 4 (see FIG. 2) of the cladding plate 3 and, on the other hand, touch the metallized surfaces of the piezoceramic material 2.
  • the solid conductors 1 are well positioned by means of the grooves 4 with, for example, a V-shaped cross section, by adjusting the groove shape to the cross-section of the solid conductor 1, the countersinking in the grooves 4 can be changed to such an extent that its protruding part for contacting can be adapted accordingly to the required contact pressure.
  • the two solid conductors 1 arranged in parallel lie at the same distance from the parallel outer sides of the cladding plates 3 and also off-center, so that the ultrasound layer transducer can be produced with cladding plates 3 of the same embodiment.
  • strands or other current conductors can also be used instead of the solid conductors. It is also possible, in deviation from the above embodiment, for the two current conductors to be arranged next to one another and for their contacting on the piezoceramic to take place by means of a cladding plate 3 which has corresponding grooves for positioning both current conductors.
  • the two solid conductors 1 protrude long from the ultrasound layer transducer and are also arranged at a certain distance from one another which corresponds to a desired or required distance.
  • the ultrasound layer transducer with the solid conductors 1 can be manufactured ready for plug-in or the solid conductors 1 as solder wires for soldering, e.g. in a printed circuit board.
  • the cohesion of the components of the ultrasound layer transducer and the contact pressure required to contact the solid wire 1 on the metallized side surface of the piezoceramic 2 can be e.g. by gluing.
  • the ultrasound layer transducer is pushed into a shielding part under pressure.
  • the ultrasound film converter described is characterized by simple, inexpensive manufacture, the use of rigid, e.g. Solid conductors 1 designed as plugs offer a particularly simple and at the same time secure connection.

Claims (8)

  1. Transducteur à couche ultra-sonore comportant une céramique piézoélectrique (2) sur les deux faces de laquelle sont maintenues des plaquettes de couverture (3), au moins une des faces latérales étant métallisée et au moins un conducteur électrique (1) étant situé entre cette face et la plaquette de couverture (3), située du même côté, qui est en contact avec la face métallisée, caractérisé en ce que le conducteur électrique (1) est encastré partiellement dans une rainure (4) de la même plaquette (3) de couverture et est pressé contre la face métallisée.
  2. Transducteur à couche ultra-sonore selon la revendication 1, caractérisé en ce qu'en plus du conducteur électrique (1), un autre conducteur électrique (1) est prévu avec un décalage latéral, le contact de chacun des deux conducteurs électriques (1) avec la céramique piézoélectrique s'effectuant dans des rainures (4) prévues à cet effet, au moyen d'une plaquette (3) de couverture.
  3. Transducteur à couche ultra-sonore selon la revendication 1, caractérisé en ce qu'en plus du conducteur électrique (1) un autre conducteur électrique (1) est prévu, et en ce que les deux conducteurs électriques (1) sont mis en contact par l'intermédiaire des faces de la plaquette piézoélectrique (2) qui sont métallisées toutes deux, un seul conducteur électrique (1) étant situé sur chaque face métallisée, dans une rainure (4) de la plaquette de couverture (3) correspondant au même côté et en ce que les deux rainures (4) sont placées en dehors du milieu et à une distance égale par rapport aux côtés étroits proches des deux plaquettes de couverture (3).
  4. Transducteur à couche ultra-sonore selon l'une des revendications précédentes, caractérisé en ce que la rainure (4) de la plaquette de couverture (3) présente une section transversale en forme de V.
  5. Transducteur à couche ultra-sonore selon l'une des revendications précédentes, caractérisé en ce que le conducteur électrique est réalisé sous la forme d'un conducteur massif.
  6. Transducteur à couche ultra-sonore selon la revendication 2 ou 3, caractérisé en ce que la dimension de l'écart entre les deux conducteurs massifs (1) correspond à celle d'un système d'enfichage ou à la distance entre des trous d'une plaquette à circuit imprimé.
  7. Transducteur à couche ultra-sonore selon l'une des revendications précédentes, caractérisé en ce que ses pièces constitutives sont assemblées au moins partiellement par collage.
  8. Transducteur à couche ultra-sonore selon l'une des revendications précédentes, caractérisé en ce que celui-ci est enfoncé sous pression dans une pièce de blindage.
EP90112871A 1989-07-17 1990-07-05 Transducteur à couche ultrasonore Expired - Lifetime EP0409007B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3923591 1989-07-17
DE3923591 1989-07-17

Publications (3)

Publication Number Publication Date
EP0409007A2 EP0409007A2 (fr) 1991-01-23
EP0409007A3 EP0409007A3 (en) 1991-11-13
EP0409007B1 true EP0409007B1 (fr) 1994-10-19

Family

ID=6385207

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90112871A Expired - Lifetime EP0409007B1 (fr) 1989-07-17 1990-07-05 Transducteur à couche ultrasonore

Country Status (3)

Country Link
EP (1) EP0409007B1 (fr)
JP (1) JPH0353700A (fr)
DE (1) DE59007485D1 (fr)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2151196A5 (fr) * 1971-08-25 1973-04-13 Siderurgie Fse Inst Rech
FR2307436A1 (fr) * 1975-04-11 1976-11-05 Bonhomme F R Perfectionnements aux cartes a circuits imprimes

Also Published As

Publication number Publication date
EP0409007A3 (en) 1991-11-13
DE59007485D1 (de) 1994-11-24
JPH0353700A (ja) 1991-03-07
EP0409007A2 (fr) 1991-01-23

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