EP0401027A3 - An acoustic transducer - Google Patents

An acoustic transducer Download PDF

Info

Publication number
EP0401027A3
EP0401027A3 EP19900305961 EP90305961A EP0401027A3 EP 0401027 A3 EP0401027 A3 EP 0401027A3 EP 19900305961 EP19900305961 EP 19900305961 EP 90305961 A EP90305961 A EP 90305961A EP 0401027 A3 EP0401027 A3 EP 0401027A3
Authority
EP
European Patent Office
Prior art keywords
acoustic transducer
transducer
transmission
constructing
amplitude
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.)
Withdrawn
Application number
EP19900305961
Other languages
German (de)
French (fr)
Other versions
EP0401027A2 (en
Inventor
Gordon Hayward
Victor James Murray
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.)
BAE Systems Electronics Ltd
Original Assignee
GEC Marconi Ltd
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 GEC Marconi Ltd filed Critical GEC Marconi Ltd
Publication of EP0401027A2 publication Critical patent/EP0401027A2/en
Publication of EP0401027A3 publication Critical patent/EP0401027A3/en
Withdrawn legal-status Critical Current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
    • B06B1/0607—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 multiple elements
    • B06B1/0622—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 multiple elements on one surface
    • B06B1/0629—Square array

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)

Abstract

In order to reduce side lobes in the transmission characteristics of an acoustic transducer the amplitude of transmission is tapered towards the edges of the aperture. This is done by constructing the transducer from ceramic-epoxy composite elements connected in a one-­ three configuration and distributed with varying volume fraction in the width and length directions.
EP19900305961 1989-06-02 1990-05-31 An acoustic transducer Withdrawn EP0401027A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8912782 1989-06-02
GB898912782A GB8912782D0 (en) 1989-06-02 1989-06-02 An acoustic transducer

Publications (2)

Publication Number Publication Date
EP0401027A2 EP0401027A2 (en) 1990-12-05
EP0401027A3 true EP0401027A3 (en) 1992-01-08

Family

ID=10657817

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900305961 Withdrawn EP0401027A3 (en) 1989-06-02 1990-05-31 An acoustic transducer

Country Status (4)

Country Link
EP (1) EP0401027A3 (en)
JP (1) JPH03113999A (en)
CA (1) CA2017382A1 (en)
GB (2) GB8912782D0 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5371717A (en) * 1993-06-15 1994-12-06 Hewlett-Packard Company Microgrooves for apodization and focussing of wideband clinical ultrasonic transducers
US5460181A (en) * 1994-10-06 1995-10-24 Hewlett Packard Co. Ultrasonic transducer for three dimensional imaging
US5434827A (en) * 1993-06-15 1995-07-18 Hewlett-Packard Company Matching layer for front acoustic impedance matching of clinical ultrasonic tranducers
US5553035A (en) * 1993-06-15 1996-09-03 Hewlett-Packard Company Method of forming integral transducer and impedance matching layers
US5465725A (en) * 1993-06-15 1995-11-14 Hewlett Packard Company Ultrasonic probe
US5423319A (en) * 1994-06-15 1995-06-13 Hewlett-Packard Company Integrated impedance matching layer to acoustic boundary problems for clinical ultrasonic transducers
US5546946A (en) * 1994-06-24 1996-08-20 Advanced Technology Laboratories, Inc. Ultrasonic diagnostic transducer array with elevation focus
JP3618406B2 (en) * 1994-06-24 2005-02-09 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Ultrasonic diagnostic transducer array capable of height focusing.
JP4413568B2 (en) * 2003-09-19 2010-02-10 パナソニック株式会社 Ultrasonic probe
DE102006015493B4 (en) * 2006-04-03 2010-12-23 Atlas Elektronik Gmbh Electroacoustic transducer
IT1398262B1 (en) * 2010-02-23 2013-02-22 Esaote Spa ULTRASOUND PROBE.
FR2973550B1 (en) * 2011-03-30 2015-12-04 Edap Tms France METHOD AND APPARATUS FOR GENERATING FOCUSED ULTRASONIC WAVE WITH SURFACE MODULATION
JP6238556B2 (en) 2013-04-25 2017-11-29 キヤノン株式会社 Subject information acquisition apparatus, control method therefor, and probe
EP2796210B1 (en) 2013-04-25 2016-11-30 Canon Kabushiki Kaisha Capacitive transducer and method of manufacturing the same
EP2796209B1 (en) 2013-04-25 2020-06-17 Canon Kabushiki Kaisha Capacitive transducer and method of manufacturing the same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2114857A (en) * 1982-02-16 1983-08-24 Gen Electric Ultrasonic transducer shading
DE3334090A1 (en) * 1982-09-22 1984-03-22 North American Philips Corp., 10017 New York, N.Y. APODIZED ULTRASONIC transducer
EP0137529A2 (en) * 1983-08-15 1985-04-17 Koninklijke Philips Electronics N.V. Method for fabricating composite electrical transducers
GB2190818A (en) * 1986-05-07 1987-11-25 Brueel & Kjaer As An ultrasonic transducer for providing a desired sound field

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2006434B (en) * 1977-10-20 1982-03-03 Rca Corp Switchable depth of focus pulse-echo ultra-sonic imaging display system
GB2095951A (en) * 1981-02-19 1982-10-06 Nat Res Dev Transducers of improved resolution and systems for the transmission and reception of radiation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2114857A (en) * 1982-02-16 1983-08-24 Gen Electric Ultrasonic transducer shading
DE3334090A1 (en) * 1982-09-22 1984-03-22 North American Philips Corp., 10017 New York, N.Y. APODIZED ULTRASONIC transducer
EP0137529A2 (en) * 1983-08-15 1985-04-17 Koninklijke Philips Electronics N.V. Method for fabricating composite electrical transducers
GB2190818A (en) * 1986-05-07 1987-11-25 Brueel & Kjaer As An ultrasonic transducer for providing a desired sound field

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ultrasonics international 87 conf. proc., london6-9 july 1987, p. 426-431, D. J. Mehrl et al. : "Design and evaluation of apodized piezo__ electric transducers" *

Also Published As

Publication number Publication date
GB9012171D0 (en) 1990-07-18
GB2232323A (en) 1990-12-05
JPH03113999A (en) 1991-05-15
CA2017382A1 (en) 1990-12-02
GB8912782D0 (en) 1989-07-19
EP0401027A2 (en) 1990-12-05

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