EP0451306A1 - Transducteur strafifié d'ultrason à sélectivité de fréquence - Google Patents

Transducteur strafifié d'ultrason à sélectivité de fréquence Download PDF

Info

Publication number
EP0451306A1
EP0451306A1 EP90106773A EP90106773A EP0451306A1 EP 0451306 A1 EP0451306 A1 EP 0451306A1 EP 90106773 A EP90106773 A EP 90106773A EP 90106773 A EP90106773 A EP 90106773A EP 0451306 A1 EP0451306 A1 EP 0451306A1
Authority
EP
European Patent Office
Prior art keywords
ultrasonic
layer
frequency
ultrasonic layer
glass breakage
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
EP90106773A
Other languages
German (de)
English (en)
Other versions
EP0451306B1 (fr
Inventor
Hans-Joachim Burger
Rudolf Dipl.-Phys. 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
Priority to EP90106773A priority Critical patent/EP0451306B1/fr
Priority to AT90106773T priority patent/ATE155601T1/de
Priority to DE59010738T priority patent/DE59010738D1/de
Priority to JP3100373A priority patent/JPH04227399A/ja
Publication of EP0451306A1 publication Critical patent/EP0451306A1/fr
Priority to US08/301,521 priority patent/US5457353A/en
Application granted granted Critical
Publication of EP0451306B1 publication Critical patent/EP0451306B1/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
    • 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
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
    • G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means

Definitions

  • the invention relates to an ultrasound film converter.
  • Previously known ultrasound layer transducers are designed as broadband near-distance transducers (EP 0 154 706 A2) or as wide-beam proximity sensors. They have high mechanical damping, ie low sensitivity, and are comparatively expensive due to high material and manufacturing costs.
  • Another disadvantage of previously known ultrasonic layer transducers is their narrow directional diagram in certain frequency ranges, which is undesirable, for example, when used for all-round detection of glass breakages, for example in motor vehicles.
  • Conventional converters with a very large bandwidth can be used for this application, which absorb the ultrasonic vibrations emitted when a glass plate is broken and convert them into an electrical signal with corresponding frequencies.
  • the break frequencies that are typical for glass breakage enable a glass pane break to be detected by means of an evaluation circuit connected downstream of the ultrasound transducer.
  • the evaluation device must first separate the break frequencies mentioned, for example by filters, from the entire spectrum in which the ultrasonic transducer is sensitive; because only the signals occurring at the relevant break frequencies are relevant for the detection of a broken glass pane.
  • an ultrasound layer converter that is only sensitive to certain frequencies, such as the breakage frequencies when breaking a glass pane, in order in this way to to be able to do without filters otherwise necessary in the evaluation circuit or at least to be able to keep the effort for the filters low.
  • the objects according to claims 2 and 3 represent advantageous configurations.
  • the objects according to claims 3 to 5 are also advantageously designed, since the mechanical damping of the ultrasound layer converter can be varied within wide limits by adding fillers. The range of converter modes can thus be increased in a targeted and defined manner if an additional evaluation of transient processes is desired. If an evaluation device is connected downstream of the ultrasound layer converter, with which received ultrasound spectra can be compared and evaluated with the ultrasound spectrum typical for glass breakage, this represents a simple embodiment for the detection of a glass pane break. A further simplification is given if the glass breakage detection arrangement contains a microprocessor for storing the contains ultrasound spectra typical for glass breakage.
  • the 1 shows an ultrasound layer transducer with a rectangular piezoceramic plate 1, which is preferably surrounded on both sides by a layer 2 made of plastic material with low acoustic impedance.
  • the two layers 2 consist, for example, of epoxy resin filled with hollow glass spheres.
  • the geometrical external dimensions of the cuboid ultrasonic layer transducer are adjusted so that the effective sound velocities of the plastic-ceramic composite result in narrow-band resonance points of sensitivity at the frequencies at which the characteristic maxima also occur in the glass breakage spectrum to be evaluated.
  • the glass breakage emission can thus advantageously be registered frequency-selectively with high sensitivity.
  • the plastic-ceramic composite mentioned is surrounded by elastic embedding material 3, which contains variable fillers for damping.
  • the narrow long side 5 or broad side 6 of the ultrasonic layer transducer can be used as a sound-receiving surface. It is kept free of the embedding material 3.
  • the dimensions of such an ultrasound layer transducer can be, for example, 20 x 10 x 2 mm, the piezoceramic plate having dimensions of, for example, 20 x 10 x 0.2 mm.
  • Such an ultrasonic layer converter has selective reception sensitivity at 60 and 120 kHz.
  • the narrow long side is used as the sound-receiving surface.
  • the broad part of the astigmatic directional diagram is greater than 120 ° at both frequencies.
  • This ultrasonic layer converter is therefore suitable for use, for example, in a glass breakage detector for motor vehicles; because this ultrasonic film converter is robust and inexpensive and also has a high sensitivity in a wide opening angle range (greater than 120 °). This enables the interior of a motor vehicle to be monitored by a single ultrasound film converter.
  • 1 is instead of a rectangular shape of the piezoceramic plate Shapes, such as round shapes or other polygon shapes can be realized.
  • the resonance frequencies mentioned above are calculated according to the known physical laws, i.e. they depend on the speed of sound in the material as well as on the dimensions. Due to the cuboid structure, there are three basic resonances, namely in addition to the longitudinal resonance also a width and thickness resonance. In circular disc-shaped versions, there are the fundamental vibration modes of the thickness vibration and the radial vibration. If you want to use additional vibration modes and thus frequencies, you can use the harmonics of the respective vibrations, the frequencies of which are multiples of the fundamental vibration.
  • the use of such an ultrasonic transducer is not limited to glass breakage detection.
  • the selective tuning of the transducer resonance frequencies can also be carried out for the spectrum of other ultrasound emissions to be measured. E.g. the characteristic emission spectrum of moving machine parts can be examined in order to test these parts for functionality or wear.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Burglar Alarm Systems (AREA)
  • Transducers For Ultrasonic Waves (AREA)
EP90106773A 1990-04-09 1990-04-09 Transducteur strafifié d'ultrason à sélectivité de fréquence Expired - Lifetime EP0451306B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP90106773A EP0451306B1 (fr) 1990-04-09 1990-04-09 Transducteur strafifié d'ultrason à sélectivité de fréquence
AT90106773T ATE155601T1 (de) 1990-04-09 1990-04-09 Frequenzselektiver ultraschall-schichtwandler
DE59010738T DE59010738D1 (de) 1990-04-09 1990-04-09 Frequenzselektiver Ultraschall-Schichtwandler
JP3100373A JPH04227399A (ja) 1990-04-09 1991-04-05 周波数選択形超音波層状変換器
US08/301,521 US5457353A (en) 1990-04-09 1994-09-07 Frequency-selective ultrasonic sandwich transducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90106773A EP0451306B1 (fr) 1990-04-09 1990-04-09 Transducteur strafifié d'ultrason à sélectivité de fréquence

Publications (2)

Publication Number Publication Date
EP0451306A1 true EP0451306A1 (fr) 1991-10-16
EP0451306B1 EP0451306B1 (fr) 1997-07-16

Family

ID=8203872

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90106773A Expired - Lifetime EP0451306B1 (fr) 1990-04-09 1990-04-09 Transducteur strafifié d'ultrason à sélectivité de fréquence

Country Status (5)

Country Link
US (1) US5457353A (fr)
EP (1) EP0451306B1 (fr)
JP (1) JPH04227399A (fr)
AT (1) ATE155601T1 (fr)
DE (1) DE59010738D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999010874A1 (fr) * 1997-08-23 1999-03-04 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Transducteur
DE4431511B4 (de) * 1993-09-23 2006-02-09 Holroyd Instruments Ltd., Bonsall, Matlock Schallschwingungswandler
CN113504307A (zh) * 2021-09-10 2021-10-15 西南石油大学 一种多频率岩心声速测量装置

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1396172A2 (fr) * 2001-01-05 2004-03-10 ANGELSEN, Bjorn A. J. Transducteur a large bande
JP2003036483A (ja) * 2001-07-25 2003-02-07 Iwata Electric:Kk 警報信号出力装置
US6540683B1 (en) 2001-09-14 2003-04-01 Gregory Sharat Lin Dual-frequency ultrasonic array transducer and method of harmonic imaging
US7259499B2 (en) 2004-12-23 2007-08-21 Askew Andy R Piezoelectric bimorph actuator and method of manufacturing thereof
TWI268179B (en) * 2005-04-12 2006-12-11 Ind Tech Res Inst Improved structure of atomizing nozzle the plate can be vibrated by the vibrator element to compress the fluid, so that the fluid is jet from the perforations in form of tiny particle
CN101111098B (zh) * 2007-08-31 2011-09-21 陕西师范大学 夹心式径向振动压电陶瓷超声换能器
DE102010029283A1 (de) * 2010-05-25 2011-12-01 Robert Bosch Gmbh Ultraschallwandler zum Einsatz in einem fluiden Medium
CN102179361B (zh) * 2011-01-04 2013-02-27 瑞声声学科技(深圳)有限公司 超声换能器的制作方法
KR102668557B1 (ko) * 2019-03-29 2024-05-22 엘지디스플레이 주식회사 표시 패널 및 이를 포함하는 표시 장치

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2842086A1 (de) * 1978-09-27 1980-04-03 Siemens Ag Elektroakustischer wandler mit hohem wirkungsgrad
EP0104457A2 (fr) * 1982-08-30 1984-04-04 Siemens Aktiengesellschaft Transducteur piézoélectrique
EP0128049A2 (fr) * 1983-06-07 1984-12-12 Matsushita Electric Industrial Co., Ltd. Sonde ultrasonore muni d'un support absorbant
EP0154706A2 (fr) * 1984-03-16 1985-09-18 Siemens Aktiengesellschaft Transducteur air-ultrason piézoélectrique à caractéristique à large bande
DE3446183A1 (de) * 1984-12-18 1986-06-26 Siemens AG, 1000 Berlin und 8000 München Piezoelektrischer wandler

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3191913A (en) * 1961-05-22 1965-06-29 Hal C Mettler Ultrasonic unit
US3457463A (en) * 1965-07-07 1969-07-22 Lewis Balamuth Method and apparatus for generating electric currents of small magnitude
US3484741A (en) * 1968-03-27 1969-12-16 Us Navy Shock wave sensor
US3846779A (en) * 1972-08-28 1974-11-05 Galloway C Ultrasonic transducer
US3863250A (en) * 1973-01-30 1975-01-28 Jr Arthur Mccluskey Glass breakage detector
US3861773A (en) * 1973-06-29 1975-01-21 Gen Electric Wire terminal for aluminum wire
US3939467A (en) * 1974-04-08 1976-02-17 The United States Of America As Represented By The Secretary Of The Navy Transducer
US4048454A (en) * 1974-12-02 1977-09-13 Barcus Lester M Sonic transducer employing rigid radiating member
US4413331A (en) * 1976-04-26 1983-11-01 Westinghouse Electric Corp. Broad beam transducer
CH594943A5 (fr) * 1976-09-09 1978-01-31 Spirig Ernst
AT353506B (de) * 1976-10-19 1979-11-26 List Hans Piezoelektrischer resonator
GB1580253A (en) * 1977-02-21 1980-11-26 Australasian Training Aids Pty Firing range
US4114063A (en) * 1977-04-27 1978-09-12 Westinghouse Electric Corp. Piezoelectric sediment particle transport detector
JPS5832559B2 (ja) * 1979-07-04 1983-07-13 株式会社 モリタ製作所 空中超音波パルスの伝送方式並びにこれに用いる超音波送受波具
FR2551611B1 (fr) * 1983-08-31 1986-10-24 Labo Electronique Physique Nouvelle structure de transducteur ultrasonore et appareil d'examen de milieux par echographie ultrasonore comprenant une telle structure
US4536673A (en) * 1984-01-09 1985-08-20 Siemens Aktiengesellschaft Piezoelectric ultrasonic converter with polyurethane foam damper
US4656384A (en) * 1984-10-25 1987-04-07 Siemens Aktiengesellschaft Ultrasonic detection sensor in hybrid structure with appertaining electronic circuit
US4837558A (en) * 1987-10-13 1989-06-06 Sentrol, Inc. Glass break detector
US4963782A (en) * 1988-10-03 1990-10-16 Ausonics Pty. Ltd. Multifrequency composite ultrasonic transducer system
US5196755A (en) * 1992-04-27 1993-03-23 Shields F Douglas Piezoelectric panel speaker

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2842086A1 (de) * 1978-09-27 1980-04-03 Siemens Ag Elektroakustischer wandler mit hohem wirkungsgrad
EP0104457A2 (fr) * 1982-08-30 1984-04-04 Siemens Aktiengesellschaft Transducteur piézoélectrique
EP0128049A2 (fr) * 1983-06-07 1984-12-12 Matsushita Electric Industrial Co., Ltd. Sonde ultrasonore muni d'un support absorbant
EP0154706A2 (fr) * 1984-03-16 1985-09-18 Siemens Aktiengesellschaft Transducteur air-ultrason piézoélectrique à caractéristique à large bande
DE3446183A1 (de) * 1984-12-18 1986-06-26 Siemens AG, 1000 Berlin und 8000 München Piezoelektrischer wandler

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4431511B4 (de) * 1993-09-23 2006-02-09 Holroyd Instruments Ltd., Bonsall, Matlock Schallschwingungswandler
WO1999010874A1 (fr) * 1997-08-23 1999-03-04 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Transducteur
CN113504307A (zh) * 2021-09-10 2021-10-15 西南石油大学 一种多频率岩心声速测量装置
CN113504307B (zh) * 2021-09-10 2021-12-21 西南石油大学 一种多频率岩心声速测量装置

Also Published As

Publication number Publication date
JPH04227399A (ja) 1992-08-17
EP0451306B1 (fr) 1997-07-16
DE59010738D1 (de) 1997-08-21
US5457353A (en) 1995-10-10
ATE155601T1 (de) 1997-08-15

Similar Documents

Publication Publication Date Title
EP0451306B1 (fr) Transducteur strafifié d'ultrason à sélectivité de fréquence
DE60032535T2 (de) Resonator mit akustischen Volumenwellen mit verbesserter lateralen Modeunterdrückung
DE3214789C2 (fr)
DE102007044490B4 (de) Ultraschallsensor zur Verwendung in einem Kraftfahrzeug
DE102006055168A1 (de) Hinderniserfassungsvorrichtung
EP1931539A1 (fr) Système de détection pour un volant d'un véhicule automobile
EP0308931B1 (fr) Transducteurs à ultrasons avec une caractéristique d'émission et de réception astigmatique
DE3111020C2 (de) Akustische Oberflächenwellenvorrichtung
EP2031580B1 (fr) Capteur à ultrasons doté d'un élément de support et d'une membrane, la membrane étant installée dans l'élément de support
EP0035220B1 (fr) Transducteur électroacoustique
DE2738773C2 (de) Elektroakustischer Wandler, insbesondere für eine Armbanduhr oder eine Taschenuhr
DE3015903A1 (de) Wandler o.dgl. element fuer akustische oberflaechenwellen
EP0678853A2 (fr) Transducteur à ultrason ayant une charactéristique de radiation asymmétrique
DE102017209823A1 (de) Ultraschallsensor
DE2536750C3 (de) Schwingungsdetektor für Musikinstrumente, insbesondere Gitarren
EP0035222A1 (fr) Transducteur électroacoustique
EP0116901A2 (fr) Appareil de contrôle ultrasonore
DE102018005540A1 (de) 1D-Ultraschallwandler-Einheit
DE3023162C2 (de) Elektroakustischer Wandler für den Tonfrequenzbereich
DE112018001850T5 (de) Piezoelektrisches akustisches Bauteil
EP0038043B1 (fr) Générateur de signaux pour l'obtention d'un signal acoustique
DE1909813C3 (de) Ultraschallverzögerungsleitung
DE2703335C2 (fr)
DE2608040C3 (fr)
DE3142069C2 (fr)

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: 19901205

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

RBV Designated contracting states (corrected)

Designated state(s): AT CH DE FR GB IT LI

17Q First examination report despatched

Effective date: 19931217

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): AT CH DE FR GB IT LI

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19970716

REF Corresponds to:

Ref document number: 155601

Country of ref document: AT

Date of ref document: 19970815

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 59010738

Country of ref document: DE

Date of ref document: 19970821

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

Effective date: 19970826

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

Ref country code: AT

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

Effective date: 19980409

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

Ref country code: CH

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

Effective date: 19980430

Ref country code: LI

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

Effective date: 19980430

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
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: GB

Payment date: 19990413

Year of fee payment: 10

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

Ref country code: FR

Payment date: 19990422

Year of fee payment: 10

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

Ref country code: DE

Payment date: 19990618

Year of fee payment: 10

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: 20000409

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

Effective date: 20000409

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

Ref country code: FR

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

Effective date: 20001229

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: 20010201

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST