EP0838271A3 - Ultrasound transducer - Google Patents

Ultrasound transducer Download PDF

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Publication number
EP0838271A3
EP0838271A3 EP97117979A EP97117979A EP0838271A3 EP 0838271 A3 EP0838271 A3 EP 0838271A3 EP 97117979 A EP97117979 A EP 97117979A EP 97117979 A EP97117979 A EP 97117979A EP 0838271 A3 EP0838271 A3 EP 0838271A3
Authority
EP
European Patent Office
Prior art keywords
ultrasound transducer
longitudinal direction
piezoelectric body
area
extended
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.)
Granted
Application number
EP97117979A
Other languages
German (de)
French (fr)
Other versions
EP0838271A2 (en
EP0838271B1 (en
Inventor
Joachim Dipl.Ing. Ritter
Bernd Dipl.Ing. Rueckelt
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.)
IntelligeNDT Systems and Services GmbH and Co KG
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 EP0838271A2 publication Critical patent/EP0838271A2/en
Publication of EP0838271A3 publication Critical patent/EP0838271A3/en
Application granted granted Critical
Publication of EP0838271B1 publication Critical patent/EP0838271B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B06B1/0648—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 of rectangular shape
    • 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
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/26—Sound-focusing or directing, e.g. scanning
    • 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
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/26—Sound-focusing or directing, e.g. scanning
    • G10K11/32—Sound-focusing or directing, e.g. scanning characterised by the shape of the source

Abstract

Die Erfindung bezieht sich auf einen Ultraschallwandler mit einem in einer Längsrichtung (1) ausgedehnten piezoelektrischen Körper (2). Gemäß der Erfindung ist die Querschnittsfläche (AR,AM) des piezoelektrischen Körpers (2) senkrecht zu dieser Längsrichtung (1) in einem Randbereich kleiner als in einem Mittelbereich. Durch diese Maßnahme wird die bei einem langen, schmalen Ultraschallwandler auftretende Amplitudenüberhöhung an den Schwingerenden weitgehend unterdrückt.

Figure 00000001
The invention relates to an ultrasonic transducer with a piezoelectric body (2) that is extended in a longitudinal direction (1). According to the invention, the cross-sectional area (A R , A M ) of the piezoelectric body (2) perpendicular to this longitudinal direction (1) is smaller in an edge area than in a central area. This measure largely suppresses the amplitude increase at the oscillator ends that occurs with a long, narrow ultrasound transducer.
Figure 00000001
EP97117979A 1996-10-28 1997-10-16 Ultrasound transducer Expired - Lifetime EP0838271B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19644762 1996-10-28
DE19644762 1996-10-28

Publications (3)

Publication Number Publication Date
EP0838271A2 EP0838271A2 (en) 1998-04-29
EP0838271A3 true EP0838271A3 (en) 2000-07-19
EP0838271B1 EP0838271B1 (en) 2004-01-07

Family

ID=7810215

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97117979A Expired - Lifetime EP0838271B1 (en) 1996-10-28 1997-10-16 Ultrasound transducer

Country Status (2)

Country Link
EP (1) EP0838271B1 (en)
DE (1) DE59711179D1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3485904B2 (en) * 2001-04-24 2004-01-13 松下電器産業株式会社 Sound transducer
CN101279318B (en) * 2007-04-06 2011-01-26 广州市新栋力超声电子设备有限公司 Ultrasonic flexural vibration device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5422532A (en) * 1993-02-09 1995-06-06 Murata Manufacturing Co., Ltd. Piezoelectric resonance component
EP0688610A2 (en) * 1994-06-21 1995-12-27 KRAUTKRÄMER GmbH & Co. Wide clean transducer for ultrasonic testing
US5481154A (en) * 1993-09-28 1996-01-02 Murata Manufacturing Co., Ltd. Piezo-resonator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5422532A (en) * 1993-02-09 1995-06-06 Murata Manufacturing Co., Ltd. Piezoelectric resonance component
US5481154A (en) * 1993-09-28 1996-01-02 Murata Manufacturing Co., Ltd. Piezo-resonator
EP0688610A2 (en) * 1994-06-21 1995-12-27 KRAUTKRÄMER GmbH & Co. Wide clean transducer for ultrasonic testing

Also Published As

Publication number Publication date
EP0838271A2 (en) 1998-04-29
EP0838271B1 (en) 2004-01-07
DE59711179D1 (en) 2004-02-12

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