EP0118837A2 - Transducteur ultrasonore - Google Patents

Transducteur ultrasonore Download PDF

Info

Publication number
EP0118837A2
EP0118837A2 EP84102147A EP84102147A EP0118837A2 EP 0118837 A2 EP0118837 A2 EP 0118837A2 EP 84102147 A EP84102147 A EP 84102147A EP 84102147 A EP84102147 A EP 84102147A EP 0118837 A2 EP0118837 A2 EP 0118837A2
Authority
EP
European Patent Office
Prior art keywords
layer
ultrasonic transducer
receiving layer
piezoelectric plastic
transducer according
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
EP84102147A
Other languages
German (de)
English (en)
Other versions
EP0118837A3 (en
EP0118837B1 (fr
Inventor
Reinhard Dr. Lerch
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
Priority to AT84102147T priority Critical patent/ATE35338T1/de
Publication of EP0118837A2 publication Critical patent/EP0118837A2/fr
Publication of EP0118837A3 publication Critical patent/EP0118837A3/de
Application granted granted Critical
Publication of EP0118837B1 publication Critical patent/EP0118837B1/fr
Expired legal-status Critical Current

Links

Images

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
    • G10K11/02—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators

Definitions

  • the invention relates to an ultrasonic transducer with a support body, a transmission layer made of a material with a relatively high dielectric constant and a first ⁇ / 4 adaptation layer, which faces the transmission layer, and a second ⁇ / 4 adaptation layer, which faces a load.
  • Ultrasonic broadband converters are used in medical ultrasound diagnostics and non-destructive material testing.
  • the medical application where a coupling between tissue and sound transducer must be carried out with the lowest possible losses, requires an improvement in the electromechanical and acoustic properties of these transducer systems.
  • An ultrasonic transducer is known, the ceramic transducer of which is adapted to a load medium, tissue or water, by means of two A / 4 adaptation layers.
  • This transducer system contains an epoxy resin backing with an acoustic impedance of 3x10 6 Pas / m, a ceramic transducer, a first ⁇ / 4 matching layer made of glass with an acoustic impedance of 10x10 6 Pas / m and a second 1/4 matching layer made of polyacrylic or made of epoxy resin with an acoustic impedance of 3x10 6 Pas / m.
  • the ceramic converter is arranged on a backing.
  • the glass plate as the first adjustment layer is very adhesive with an adhesive low viscosity, so that adhesive layers are in the range of about 2 microns.
  • the epoxy resin, as the second adaptation layer is poured directly onto the first adaptation layer (experimental studies on the construction of ultrasound broadband transducers, biomedical engineering, volume 27, issues 7 to 8, 1982, pages 182 to 185). This double ⁇ / 4 adaptation only improves the sensitivity and the bandwidth of the ceramic transmission layer. The bandwidth of this ultrasonic transducer is approximately 60 to 70% of the center frequency.
  • an ultrasonic transducer which has a transmission layer made of a material with a relatively high dielectric constant and high sound impedance and a reception layer made of a material with a relatively low dielectric constant and low sound impedance, which are connected flatly in hybrid technology.
  • the transmission layer consists, for example, of lead zirconate titanate PZT or lead metaniobate Pb (NG 3 ).
  • the receiving layer consists of a piezoelectric plastic film with an acoustic impedance of approximately 3 ⁇ 10 6 Pas / m, for example polyvinylidene fluoride PVDF or polycarbonate or polyvinyl chloride PVC.
  • the receiving layer should also be an adaptation layer for the transmission case (German patent specification 29 14 031).
  • the formation of the receiving layer as an adaptation layer for adaptation to body tissue can, however, only be designed as a simple ⁇ / 4 layer.
  • the adaptation layer for the transmission case is not a simple / 4 adaptation. With a simple 1/4 adjustment, the theory results in an adjustment layer with an acoustic impedance of about 7x10 6 Pas / m.
  • the invention is based on the object of specifying an ultrasonic transducer with an effective broadband transmitter and a sensitive and broadband receiver.
  • the ceramic vibrating material of the transmission layer is to be broadband adapted to tissue or water.
  • the receiving layer consists of a stack of thin piezoelectric plastic films that are electrically connected in series. This design of the receiving layer makes it easier to polarize the individual piezoelectric plastic films due to the small thickness.
  • the receiving layer consists of an active and a passive piezoelectric plastic film, the active piezoelectric plastic film being arranged on the first adaptation layer and the passive piezoelectric plastic film facing the load.
  • the thickness of the passive piezoelectric plastic film is a multiple of the thickness of the active piezoelectric plastic film.
  • an ultrasound transducer contains a support body 2, a transmission layer 4 and two ⁇ / 4 adaptation layers, the second A / 4 adaptation layer also being provided as a reception layer 6.
  • the first ⁇ / 4 adaptation layer 8 faces the transmission layer 4 and is also provided as backing for the reception layer 6. All layers can preferably be connected to one another over a large area in hybrid technology.
  • the thicknesses of the matching layers are each a quarter wavelength at a predetermined resonance frequency. With a resonance frequency of approximately 10 MHz, the thickness of the matching layers is, for example, 55 ⁇ m and, for a resonance frequency of approximately 2 MHz, for example, 275 ⁇ m.
  • a material with a relatively high dielectric constant and high sound impedance serves as the transmission layer 4.
  • a transmission layer 4 made of lead zirconate titanate PZT or lead metanobate Pb (N0 3 ) is preferred.
  • the two matching layers have the task of matching different acoustic impedances to each other with little reflection.
  • the material for the first adaptation layer 8 can be, for example, porcelain, preferably quartz glass, in particular a glass-like material (Macor), and for the second adaptation layer one can use, for example, polyvinyl chloride PVC, in particular polyvinylidene fluoride PVDF.
  • the polyvinylidene fluoride PVDF layer must be polarized and provided with electrical connections which, like the electrical connections of the transmission layer, are not shown in FIG. 1.
  • This design provides a broadband and sensitive ultrasound transducer, which is used in medicine in particular because of its almost low-reflection coupling between tissue and ultrasound transducer.
  • the receiving layer 6 consists of a stack of thin piezoelectric plastic films 10 electrically connected in series. These piezoelectric plastic films 10 are each polarized in the same direction and the thickness of the stack is a quarter wavelength at a predetermined resonance frequency. Up to a frequency of, for example, 4 MHz, the stack can expediently consist of, for example, 25 ⁇ m thick plastic films 10, while for higher frequencies the stack can be constructed of, for example, 9 ⁇ m thick plastic films 10.
  • polyvinyl chloride PVC in particular polyvinylidene fluoride PVDF, can be used as the material for the piezoelectric plastic films of the receiving layer 6.
  • This configuration of the receiving layer 6 enables the thin, for example 9 ⁇ m to 25 ⁇ m thick, piezoelectric plastic films to be polarized very well.
  • the receiving layer 6 consists of an active piezoelectric plastic film 12 and a thicker passive piezoelectric plastic film 14.
  • the thickness of the passive piezoelectric plastic film 14 of the receiving layer 6 is a multiple, for example 2 to 15 times, of the thickness of the active piezoelectric plastic film 12 of the receiving layer 6.
  • the active piezoelectric plastic film 12, which is for example 25 ⁇ m thick, is arranged on the first ⁇ / 4 matching layer 8 and the passive piezoelectric plastic film 14 faces the load.
  • This configuration of the receiving layer 6 results in a broadband and sensitive ultrasound transducer with a comparatively large capacity and a correspondingly low internal impedance with comparatively small spatial dimensions.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Surgical Instruments (AREA)
EP84102147A 1983-03-15 1984-02-29 Transducteur ultrasonore Expired EP0118837B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84102147T ATE35338T1 (de) 1983-03-15 1984-02-29 Ultraschallwandler.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3309236 1983-03-15
DE19833309236 DE3309236A1 (de) 1983-03-15 1983-03-15 Ultraschallwandler

Publications (3)

Publication Number Publication Date
EP0118837A2 true EP0118837A2 (fr) 1984-09-19
EP0118837A3 EP0118837A3 (en) 1985-05-15
EP0118837B1 EP0118837B1 (fr) 1988-06-22

Family

ID=6193523

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84102147A Expired EP0118837B1 (fr) 1983-03-15 1984-02-29 Transducteur ultrasonore

Country Status (5)

Country Link
EP (1) EP0118837B1 (fr)
JP (1) JPS59161800U (fr)
AT (1) ATE35338T1 (fr)
CA (1) CA1252558A (fr)
DE (2) DE3309236A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0166976A1 (fr) * 1984-06-14 1986-01-08 Siemens Aktiengesellschaft Ensemble de transducteurs à ultrasons
DE3501808A1 (de) * 1985-01-21 1986-07-24 Siemens AG, 1000 Berlin und 8000 München Ultraschallwandler
EP0212352A1 (fr) * 1985-08-09 1987-03-04 Siemens Aktiengesellschaft Générateur d'ultrasons
EP0421286A2 (fr) * 1989-10-03 1991-04-10 Richard Wolf GmbH Transducteur piézoélectrique
EP0451517A1 (fr) * 1990-04-11 1991-10-16 Hewlett-Packard Company Acquisition d'image acoustique
US5263004A (en) * 1990-04-11 1993-11-16 Hewlett-Packard Company Acoustic image acquisition using an acoustic receiving array with variable time delay
DE19714606A1 (de) * 1997-04-09 1998-10-15 Itt Mfg Enterprises Inc Ultraschallsensormodul mit Folienwandler
WO1999032858A1 (fr) * 1997-12-23 1999-07-01 Simmonds Precision Products, Inc. Dispositif a ultrasons pour la mesure de niveau de liquide
EP2295154A1 (fr) * 2009-09-15 2011-03-16 Fujifilm Corporation Transducteur ultrasonique, sonde ultrasonique et procédé de production
US20230134074A1 (en) * 2021-10-28 2023-05-04 Baker Hughes, A Ge Company, Llc Ultrasonic transducer for flow measurement

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3430186A1 (de) * 1984-08-16 1986-02-27 Siemens AG, 1000 Berlin und 8000 München Verfahren zur herstellung eines poroesen piezoelektrischen materials und nach diesem verfahren hergestelltes material
DE3839057A1 (de) * 1988-11-18 1990-05-23 Fraunhofer Ges Forschung Gruppenstrahler
DE102007027277A1 (de) * 2007-06-11 2008-12-18 Endress + Hauser Flowtec Ag Ultraschallsensor
JP5392090B2 (ja) * 2007-11-21 2014-01-22 コニカミノルタ株式会社 超音波受信用振動子、その製造方法、超音波探触子及び超音波医用画像診断装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4016530A (en) * 1975-06-02 1977-04-05 Goll Jeffrey H Broadband electroacoustic converter
EP0021534A1 (fr) * 1979-06-25 1981-01-07 Koninklijke Philips Electronics N.V. Transducteur acoustique
US4427912A (en) * 1982-05-13 1984-01-24 Ausonics Pty. Ltd. Ultrasound transducer for enhancing signal reception in ultrasound equipment

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57141199A (en) * 1981-02-25 1982-09-01 Aloka Co Ltd Ultrasonic wave probe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4016530A (en) * 1975-06-02 1977-04-05 Goll Jeffrey H Broadband electroacoustic converter
EP0021534A1 (fr) * 1979-06-25 1981-01-07 Koninklijke Philips Electronics N.V. Transducteur acoustique
US4427912A (en) * 1982-05-13 1984-01-24 Ausonics Pty. Ltd. Ultrasound transducer for enhancing signal reception in ultrasound equipment

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Biomedizinische Technik, Bd. 27 Heft 7 Seiten 183-184 *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0166976A1 (fr) * 1984-06-14 1986-01-08 Siemens Aktiengesellschaft Ensemble de transducteurs à ultrasons
DE3501808A1 (de) * 1985-01-21 1986-07-24 Siemens AG, 1000 Berlin und 8000 München Ultraschallwandler
US4672591A (en) * 1985-01-21 1987-06-09 Siemens Aktiengesellschaft Ultrasonic transducer
EP0212352A1 (fr) * 1985-08-09 1987-03-04 Siemens Aktiengesellschaft Générateur d'ultrasons
US4718421A (en) * 1985-08-09 1988-01-12 Siemens Aktiengesellschaft Ultrasound generator
EP0421286A3 (en) * 1989-10-03 1992-06-03 Richard Wolf Gmbh Piezoelectric transducer
EP0421286A2 (fr) * 1989-10-03 1991-04-10 Richard Wolf GmbH Transducteur piézoélectrique
EP0451517A1 (fr) * 1990-04-11 1991-10-16 Hewlett-Packard Company Acquisition d'image acoustique
US5263004A (en) * 1990-04-11 1993-11-16 Hewlett-Packard Company Acoustic image acquisition using an acoustic receiving array with variable time delay
DE19714606A1 (de) * 1997-04-09 1998-10-15 Itt Mfg Enterprises Inc Ultraschallsensormodul mit Folienwandler
WO1999032858A1 (fr) * 1997-12-23 1999-07-01 Simmonds Precision Products, Inc. Dispositif a ultrasons pour la mesure de niveau de liquide
EP2295154A1 (fr) * 2009-09-15 2011-03-16 Fujifilm Corporation Transducteur ultrasonique, sonde ultrasonique et procédé de production
US20230134074A1 (en) * 2021-10-28 2023-05-04 Baker Hughes, A Ge Company, Llc Ultrasonic transducer for flow measurement
US11806749B2 (en) * 2021-10-28 2023-11-07 Baker Hughes, A Ge Company, Llc Ultrasonic transducer for flow measurement

Also Published As

Publication number Publication date
EP0118837A3 (en) 1985-05-15
ATE35338T1 (de) 1988-07-15
EP0118837B1 (fr) 1988-06-22
JPS59161800U (ja) 1984-10-30
DE3309236A1 (de) 1984-09-20
CA1252558A (fr) 1989-04-11
DE3472318D1 (en) 1988-07-28
JPH0453117Y2 (fr) 1992-12-14

Similar Documents

Publication Publication Date Title
DE3501808C2 (fr)
DE69109923T2 (de) Ultraschallwandleranordnung.
EP0166976B1 (fr) Ensemble de transducteurs à ultrasons
EP0118837B1 (fr) Transducteur ultrasonore
DE3611669C2 (fr)
DE9401033U1 (de) Ultraschallwandlersystem mit zwei oder mehr Resonanzfrequenzen
DE19635593C1 (de) Ultraschallwandler für den diagnostischen und therapeutischen Einsatz
DE69430490T3 (de) Verfahren zur Herstellung einer Wandleranordnung zur Bilderzeugung
DE602004004488T2 (de) Ultraschallsonde mit leitfähiger akustischer Anpassungsschicht
DE69114357T2 (de) Ultraschallwandler mit verringerter gegenseitiger Beeinflussung.
DE4010294C2 (fr)
DE3210925A1 (de) Ultraschallwandler
EP0173864B1 (fr) Transducteur à ultrasons muni d'une couche d'adaptation poreuse
DE3587146T2 (de) Piezoelektrische polymerultraschallsonde.
DE69936507T2 (de) Katheter mit ringförmig angeordneten ultraschallwandlern
DE3124919C2 (de) Wandleranordnung für Ultraschall-Abtastgeräte
DE3331955C2 (de) Ultraschallwandler
DE10230129A1 (de) Ultraschall-Messwertwandlervorrichtung zur Verbesserung der Auflösung in einem Abbildungssystem
DE112007002645T5 (de) Ultraschallsonde
DE3526488A1 (de) Ultraschall-wandler mit piezoelektrischem verbundmaterial
DE112007001957T5 (de) Schallwandleranordnung mit geringem Profil
DE3237358A1 (de) Element fuer elastische oberflaechenwellen
DE3733776A1 (de) Ultraschallsonde
DE60315286T2 (de) Gruppe von membran-ultraschallwandlern
EP0045989A2 (fr) Dispositif d'adaptation de l'impédance acoustique

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT DE FR GB

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT DE FR GB

17P Request for examination filed

Effective date: 19850827

17Q First examination report despatched

Effective date: 19870422

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE FR GB

REF Corresponds to:

Ref document number: 35338

Country of ref document: AT

Date of ref document: 19880715

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3472318

Country of ref document: DE

Date of ref document: 19880728

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19890425

Year of fee payment: 6

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19900131

Year of fee payment: 7

Ref country code: AT

Payment date: 19900131

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19900226

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19901101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19910228

Ref country code: AT

Effective date: 19910228

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19911031

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST