EP0609561B1 - Messwandler - Google Patents

Messwandler Download PDF

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Publication number
EP0609561B1
EP0609561B1 EP19930120935 EP93120935A EP0609561B1 EP 0609561 B1 EP0609561 B1 EP 0609561B1 EP 19930120935 EP19930120935 EP 19930120935 EP 93120935 A EP93120935 A EP 93120935A EP 0609561 B1 EP0609561 B1 EP 0609561B1
Authority
EP
European Patent Office
Prior art keywords
circuit board
printed circuit
recess
piezoelectric disc
ultrasonic transducer
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
EP19930120935
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0609561A1 (de
Inventor
Günther HAUENSTEIN
Volker Hensel
Horst Schupp
Martina Hinkel
Michael Steghaus
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.)
Electrowatt Technology Innovation AG
Original Assignee
Landis and Gyr Technology Innovation 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 Landis and Gyr Technology Innovation AG filed Critical Landis and Gyr Technology Innovation AG
Publication of EP0609561A1 publication Critical patent/EP0609561A1/de
Application granted granted Critical
Publication of EP0609561B1 publication Critical patent/EP0609561B1/de
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
    • 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
    • B06B1/0677—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 and a high impedance backing

Definitions

  • the invention relates to an ultrasonic transducer or measuring transducer according to the preamble of claims 1 and 10, respectively.
  • Such ultrasonic transducers are suitable for measuring the flow velocity of a medium by means of acoustic waves, for example in the case of electronic heat meters or flow volume meters.
  • An ultrasonic transducer of this type is known from DE-PS 29 34 031, which describes the design features of the ultrasonic transducer for use in hot, liquid media.
  • the active part of the ultrasonic transducer is arranged in a transducer housing and consists of a relatively thin disk made of a piezoceramic between flat electrodes which are arranged on the end faces of the disk.
  • the first electrode completely covers the front face and, for better contact, extends over the cylinder jacket to the rear face.
  • the piezoceramic disc is arranged in a pot-shaped recess in the converter housing behind a membrane, so that the disc is separated from the usually aggressive medium.
  • a full-surface adhesive connection between the front face of the disc and the membrane effects a good transmission of the ultrasound into the medium and centers the disc on the axis of the converter housing.
  • the converter housing 2 is shown as an example in section in FIG. 2 and is in the basic form a simple plate made of metal (e.g. brass, steel etc.), the thickness of which is due to the pressure resistance prescribed for the transmitter housing as well as the space required by the Recess 5 is determined.
  • the recess 5 is lowered from the surface of the transducer housing 2 facing the transducer housing and has a completely flat base 12 in the drawing. To avoid the risk of breakage, the floor 12 can also be lowered in hazardous areas.
  • the alignment of the circuit board 3 by means of the eyelets 25, 26 on the Pi ⁇ zo disk 1 in a device has the advantage that the predetermined alignment can be reproduced with great accuracy and that the method is suitable for automating the soldering process.
  • the substrate 17 (FIG. 4) is connected to the membrane 14, for example to the adhesive film 16 (FIG. 6).
  • the end face with the large electrode 20 (FIG. 4) is pressed against the bottom 12 by means of the membrane 14.
  • a cushion 38 made of plastic is arranged between the Pi ⁇ zo disc 1 and the base 12 in order to acoustically decouple the Pi ⁇ zo disc 1 from the base 12 and to electrically isolate the large electrode 20 from the transducer housing 2. Ultrasound is received and emitted on the side of the central electrode 19 (FIG. 4) through the printed circuit board 3 and the membrane 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transducers For Ultrasonic Waves (AREA)
EP19930120935 1993-02-04 1993-12-27 Messwandler Expired - Lifetime EP0609561B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH33593 1993-02-04
CH335/93 1993-02-04

Publications (2)

Publication Number Publication Date
EP0609561A1 EP0609561A1 (de) 1994-08-10
EP0609561B1 true EP0609561B1 (de) 1996-09-04

Family

ID=4184675

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930120935 Expired - Lifetime EP0609561B1 (de) 1993-02-04 1993-12-27 Messwandler

Country Status (3)

Country Link
EP (1) EP0609561B1 (sh)
DE (1) DE59303655D1 (sh)
DK (1) DK0609561T3 (sh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10026568A1 (de) * 2000-05-30 2001-12-13 Siemens Ag Verbindungsstück für ein Ultraschallwandlergehäuse
EP2246401A1 (de) 2009-04-30 2010-11-03 Valeo Schalter und Sensoren GmbH Verfahren zum Ankleben piezokeramischer Bauelemente und Klebemittel zur Durchführung des Verfahrens

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107785479A (zh) * 2016-08-31 2018-03-09 成都汇通西电电子有限公司 压电陶瓷芯片电连接方法及传感器制造方法
TWI680232B (zh) 2018-08-13 2019-12-21 科際精密股份有限公司 流體驅動裝置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2138036A (en) * 1932-12-24 1938-11-29 Submarine Signal Co Compressional wave sender or receiver
CH642503A5 (en) * 1979-08-02 1984-04-13 Landis & Gyr Ag Ultrasound converter
US4417170A (en) * 1981-11-23 1983-11-22 Imperial Clevite Inc. Flexible circuit interconnect for piezoelectric element

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10026568A1 (de) * 2000-05-30 2001-12-13 Siemens Ag Verbindungsstück für ein Ultraschallwandlergehäuse
DE10026568C2 (de) * 2000-05-30 2002-11-21 Siemens Ag Verbindungsstück für ein Ultraschallwandlergehäuse
EP2246401A1 (de) 2009-04-30 2010-11-03 Valeo Schalter und Sensoren GmbH Verfahren zum Ankleben piezokeramischer Bauelemente und Klebemittel zur Durchführung des Verfahrens
DE102009019667A1 (de) 2009-04-30 2010-11-04 Valeo Schalter Und Sensoren Gmbh Verfahren zum Ankleben piezokeramischer Bauelemente und Klebemittel zur Durchführung des Verfahrens

Also Published As

Publication number Publication date
DE59303655D1 (de) 1996-10-10
EP0609561A1 (de) 1994-08-10
DK0609561T3 (sh) 1997-02-24

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