EP0914215B1 - Transducteur ultrasonique a element d'adaptation quart d'onde en forme de disque - Google Patents

Transducteur ultrasonique a element d'adaptation quart d'onde en forme de disque Download PDF

Info

Publication number
EP0914215B1
EP0914215B1 EP97935425A EP97935425A EP0914215B1 EP 0914215 B1 EP0914215 B1 EP 0914215B1 EP 97935425 A EP97935425 A EP 97935425A EP 97935425 A EP97935425 A EP 97935425A EP 0914215 B1 EP0914215 B1 EP 0914215B1
Authority
EP
European Patent Office
Prior art keywords
ultrasonic transducer
piezoceramic
base area
disk
accordance
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
EP97935425A
Other languages
German (de)
English (en)
Other versions
EP0914215A1 (fr
Inventor
Rudolf Thurn
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 EP0914215A1 publication Critical patent/EP0914215A1/fr
Application granted granted Critical
Publication of EP0914215B1 publication Critical patent/EP0914215B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B06B1/067—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 which is used as, or combined with, an impedance matching layer

Definitions

  • the invention relates to an ultrasonic transducer a disk-shaped piezoceramic body and with a disc-shaped ⁇ / 4 adaptation body.
  • a generic ultrasound transducer is used in Ultrasonic sensors or proximity switches are already known. It has a relatively narrow sound beam characteristic and has relatively small side lobe amplitudes.
  • the ⁇ / 4 adaptation body is used for transmission and for receiving ultrasonic waves in a gaseous propagation medium, preferably for use in ultrasonic proximity switches.
  • DE 39 11 047 C2 describes an ultrasonic transducer with a Piezoceramic body and an adaptation body known in which the surface of the adapter body facing away from the piezoceramic body one in relation to the base area of the piezoceramic body and the surface of the adaptation body facing this has slightly different area size.
  • the Side line of the adjustment body is divergent or converging with a straight, concave or convex course.
  • the sound beam characteristic that can be achieved with this is considerable Side lobe amplitudes of approx. -19 dB compared to the main lobe amplitude is for the use of the ultrasonic transducer, e.g. in confined spaces and in the presence Lateral interference objects, insufficient.
  • EP 0 655 156 B1 describes an ultrasonic transducer with a Adaptation body with cylindrical outer surface disclosed, that on the lateral surface and / or on the piezoceramic body facing surface has an incision. This execution enables straight-forward sound beams with small ones Sidelobe amplitudes of less than -30 dB.
  • the invention has for its object an ultrasonic transducer of the above kind to improve that he narrow main lobe opening angle at the same time small Sidelobe amplitudes.
  • the object is achieved in that the lateral peripheral surface of the ⁇ / 4 adaptation body is designed as a step profile is.
  • FIG. 1 shows the sectional view of an embodiment according to the invention an ultrasonic transducer 1 with a cylindrical, disk-shaped piezoceramic body 2 and one with this e.g. glued disc-shaped adjustment body 3.
  • the lateral peripheral surface of the adapter body 3 is here designed as a simple, right-angled step profile.
  • the present simplified representation is the top one and lower metallization surfaces of the piezoceramic body 2 as well as the metallization surface facing the adaptation body 3, which, for example, through a in the adhesive layer inserted thin metal contact foil or made of a metal-plastic composite is not shown.
  • the lateral step contour results in favorable Waveforms of the outward-facing, sound-emitting Surface of the adapter body 3, which is to be sharpened Lead sonic lobes with very small side lobe amplitudes.
  • the diameter is the disk-shaped piezoceramic body 2 and the Diameter of the base surface facing the piezoceramic body 2 of the adapter body 3 23 mm.
  • the diameter of the averted, outer surface of the adapter body 3 28 mm, the total height of the adaptation body 3 is 6.5 mm, and the height of the protruding part of the fitting body with the diameter of 28 mm is 2.4 mm.
  • the adaptation body 3 consists of a robust syntactic foam an epoxy-hollow glass mixture.
  • the exemplary ultrasonic transducer 1 has a resonant working frequency of approx. 80 kHz with a -3 dB width of the beam angle of approx. 11 ° and very small side lobe amplitudes of approx. -30 dB.
  • Ultrasonic transducer 1 with a step profile
  • the Surfaces are not at right angles to each other. More possible Embodiments arise when the step profile two or more right-angled and / or non-right-angled ones Stages is composed. The thereby enlarging Diameter of the sound radiating surface of the Adaptation body 3 leads to a narrower sound beam opening angle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Claims (6)

  1. Transducteur (1) à ultrasons ayant un élément (2) piézocéramique en forme de disque et un élément (3) d'adaptation λ/4 en forme de disque, caractérisé en ce que la surface latérale périphérique de l'élément (3) d'adaptation λ/4 est constituée en profil (4) en gradin, la surface de base de l'élément (3) d'adaptation λ/4 qui est éloignée de l'élément (2) piézocéramique et qui émet le son étant plane sur toute sa zone et plus grande que la surface de base de l'élément (2) piézocéramique.
  2. Transducteur à ultrasons suivant la revendication 1, caractérisé en ce que la surface de base de l'élément (3) d'adaptation, qui est tournée vers l'élément (2) piézocéramique, s'écarte au maximum de 20 % de la surface de base de l'élément (2) piézocéramique.
  3. Transducteur à ultrasons suivant la revendication 1 ou 2, caractérisé en ce que la surface de base de l'élément (3) d'adaptation λ/4, qui est éloignée de l'élément (2) piézocéramique et qui émet le son, est plus grande d'au moins 30 % que la surface de base de l'élément (2) piézocéramique.
  4. Transducteur à ultrasons suivant l'une des revendications précédentes, caractérisé en ce que le profil (4) en gradin est constitué sous la forme d'un gradin simple ayant des surfaces dirigées à angle droit l'une par rapport à l'autre.
  5. Transducteur à ultrasons suivant l'une des revendications précédentes, caractérisé en ce que le profil en gradin est constitué sous la forme d'un profil ayant des surfaces en parties également inclinées sans être à angle droit l'une par rapport à l'autre.
  6. Transducteur à ultrasons suivant l'une des revendications précédentes, caractérisé en ce que le profil (4) en gradins est constitué de deux ou de plusieurs gradins à angle droit et/ou qui ne sont pas à angle droit.
EP97935425A 1996-07-26 1997-07-15 Transducteur ultrasonique a element d'adaptation quart d'onde en forme de disque Expired - Lifetime EP0914215B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19630350A DE19630350C2 (de) 1996-07-26 1996-07-26 Ultraschallwandler
DE19630350 1996-07-26
PCT/DE1997/001493 WO1998004361A1 (fr) 1996-07-26 1997-07-15 Transducteur ultrasonique a element d'adaptation quart d'onde en forme de disque

Publications (2)

Publication Number Publication Date
EP0914215A1 EP0914215A1 (fr) 1999-05-12
EP0914215B1 true EP0914215B1 (fr) 2001-10-17

Family

ID=7801027

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97935425A Expired - Lifetime EP0914215B1 (fr) 1996-07-26 1997-07-15 Transducteur ultrasonique a element d'adaptation quart d'onde en forme de disque

Country Status (6)

Country Link
US (1) US6104121A (fr)
EP (1) EP0914215B1 (fr)
JP (1) JP3788520B2 (fr)
CN (1) CN1104968C (fr)
DE (2) DE19630350C2 (fr)
WO (1) WO1998004361A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101909230A (zh) * 2010-07-15 2010-12-08 哈尔滨工程大学 金属与压电陶瓷和聚合物复合材料宽带水声换能器

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19727877A1 (de) * 1997-06-30 1999-01-07 Bosch Gmbh Robert Ultraschallwandler
JP4499902B2 (ja) * 1999-11-01 2010-07-14 セイコーインスツル株式会社 超音波モータおよび超音波モータ付電子機器
DE19957125A1 (de) 1999-11-26 2001-06-21 Siemens Ag Ultraschall-Wandler
US8669282B2 (en) 2000-10-31 2014-03-11 Hill's Pet Nutrition, Inc. Companion animal compositions including lipoic acid and methods of use thereof
US20020076470A1 (en) 2000-10-31 2002-06-20 Colgate-Palmolive Company Composition and method
JP2007512558A (ja) * 2003-11-27 2007-05-17 日立ビアメカニクス株式会社 レーザービームによる材料加工装置
DE202004002107U1 (de) * 2004-02-11 2005-03-31 Siemens Ag Ultraschallwandler
ES2436181T3 (es) 2004-12-29 2013-12-27 Hill's Pet Nutrition Inc. Métodos para inhibir un declive en el aprendizaje y/o la memoria en animales
WO2007009111A1 (fr) 2005-07-14 2007-01-18 Hill's Pet Nutrition, Inc. Procede permettant de prolonger la vie d'animaux
EP1911530B1 (fr) * 2006-10-09 2009-07-22 Baumer Electric AG Transducteur à ultrasons doté d'une adaptation d'impédance acoustique
DE102007047013A1 (de) * 2007-10-01 2009-04-02 Robert Bosch Gmbh Reaktionsharz und Zweikomponentensystem zur Herstellung desselben
CN107754504A (zh) * 2017-11-07 2018-03-06 西安智水环境科技有限公司 一种消霾***次声波水分子共震装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4556814A (en) * 1984-02-21 1985-12-03 Ngk Spark Plug Co., Ltd. Piezoelectric ultrasonic transducer with porous plastic housing
US4641054A (en) * 1984-08-09 1987-02-03 Nippon Ceramic Company, Limited Piezoelectric electro-acoustic transducer
US4823042A (en) * 1986-07-18 1989-04-18 Rich-Mar Corporation Sonic transducer and method for making the same
DE3911047A1 (de) * 1989-04-05 1990-10-11 Pepperl & Fuchs Ultraschallwandler
EP0420758B1 (fr) * 1989-09-29 1995-07-26 Terumo Kabushiki Kaisha Elément de couplage ultrasonore et méthode de fabrication
US5659220A (en) * 1992-08-13 1997-08-19 Siemens Aktiengesellschaft Ultrasonic transducer
DE4423639C2 (de) * 1994-07-06 1997-01-23 Pepperl & Fuchs Ultraschallwandler zum Abstrahlen und/oder Empfangen von Ultraschallwellen in gasförmigen Medien
DE19527018C1 (de) * 1995-07-24 1997-02-20 Siemens Ag Ultraschallwandler

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101909230A (zh) * 2010-07-15 2010-12-08 哈尔滨工程大学 金属与压电陶瓷和聚合物复合材料宽带水声换能器

Also Published As

Publication number Publication date
DE59704990D1 (de) 2001-11-22
WO1998004361A1 (fr) 1998-02-05
CN1104968C (zh) 2003-04-09
JP2000515804A (ja) 2000-11-28
JP3788520B2 (ja) 2006-06-21
CN1225041A (zh) 1999-08-04
US6104121A (en) 2000-08-15
DE19630350C2 (de) 1998-08-20
DE19630350A1 (de) 1998-01-29
EP0914215A1 (fr) 1999-05-12

Similar Documents

Publication Publication Date Title
EP0914215B1 (fr) Transducteur ultrasonique a element d'adaptation quart d'onde en forme de disque
DE69721728T2 (de) Ultraschallsende-/empfangsgerät
EP0178346B1 (fr) Transducteur à ultrasons
EP0840655B1 (fr) Transducteur ultrasonore
EP0300319B1 (fr) Dispositif résonant à commande piézoélectrique pour atomiser un fluide par ultrasons
CA2119954A1 (fr) Transducteurs a ultrasons a lobes lateraux reduits et methode de fabrication de ces transducteurs
EP0807924B1 (fr) Transducteur à son ou ultrason
DE102011090079A1 (de) Ultraschallwandler für ein Ultraschall-Durchflussmessgerät
DE3732410A1 (de) Ultraschallwandler mit astigmatischer sende-/empfangscharakteristik
DE4231253A1 (de) Membran fuer elektrodynamische wandler
EP0615471B1 (fr) Transducteur sonore ou ultrasonore
AT398355B (de) Elektroakustischer wandler mit einem abschlussteil
EP0655156B1 (fr) Transducteur ultrasonore
DE4323134C1 (de) Ultraschallschwinger
DE2109013C3 (de) Elektroakustischer Wandler
EP0678853A2 (fr) Transducteur à ultrason ayant une charactéristique de radiation asymmétrique
DE19623071C2 (de) Ultraschallwandler
DE3401979C2 (fr)
DE3933519C2 (de) Vorrichtung zur Reinigung von Gegenständen mit Ultraschall
DE4423639C2 (de) Ultraschallwandler zum Abstrahlen und/oder Empfangen von Ultraschallwellen in gasförmigen Medien
EP0307799A2 (fr) Dispositif d'atténuation pour transducteurs d'impulsions ultrasonores
DE2712595C3 (de) Radar-Antwortbake mit elektroakustischer Verzögerungsleitung mit Mehrfachreflexion zur Impulscodierung
EP1287923B1 (fr) Logement d' interrupteur dans un panneau frontal d' un appareil et sa méthode de production
DE4235089C1 (de) Ultraschallwandler mit einem piezoelektrischen Wandlerelement
EP0688610B1 (fr) Transducteur à faisceau large pour examen par ultrasons

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

17P Request for examination filed

Effective date: 19990120

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE FR GB LI

17Q First examination report despatched

Effective date: 19990722

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB LI

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: SIEMENS SCHWEIZ AG

REF Corresponds to:

Ref document number: 59704990

Country of ref document: DE

Date of ref document: 20011122

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20020227

ET Fr: translation filed
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

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

Ref country code: CH

Payment date: 20051013

Year of fee payment: 9

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

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060731

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060731

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

Free format text: REGISTERED BETWEEN 20110217 AND 20110223

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 19

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

Ref country code: GB

Payment date: 20150611

Year of fee payment: 19

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

Ref country code: FR

Payment date: 20150610

Year of fee payment: 19

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

Ref country code: DE

Payment date: 20150729

Year of fee payment: 19

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59704990

Country of ref document: DE

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20160715

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

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170201

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160801

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20170331

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

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160715