EP0178346A1 - Transducteur à ultrasons - Google Patents

Transducteur à ultrasons Download PDF

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Publication number
EP0178346A1
EP0178346A1 EP84112594A EP84112594A EP0178346A1 EP 0178346 A1 EP0178346 A1 EP 0178346A1 EP 84112594 A EP84112594 A EP 84112594A EP 84112594 A EP84112594 A EP 84112594A EP 0178346 A1 EP0178346 A1 EP 0178346A1
Authority
EP
European Patent Office
Prior art keywords
top plate
side plate
ultrasonic transducer
cylindrical side
plate
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
EP84112594A
Other languages
German (de)
English (en)
Other versions
EP0178346B1 (fr
Inventor
Toshiharu Ito
Eiji Ozeki
Kozo Okada
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.)
Niterra Co Ltd
Original Assignee
NGK Spark Plug Co 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27284612&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0178346(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from JP2434684U external-priority patent/JPS60136599U/ja
Priority claimed from JP2648784U external-priority patent/JPS60139399U/ja
Priority claimed from JP5034784U external-priority patent/JPS60163899U/ja
Application filed by NGK Spark Plug Co Ltd filed Critical NGK Spark Plug Co Ltd
Priority to DE8484112594T priority Critical patent/DE3486035D1/de
Publication of EP0178346A1 publication Critical patent/EP0178346A1/fr
Application granted granted Critical
Publication of EP0178346B1 publication Critical patent/EP0178346B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • G10K11/002—Devices for damping, suppressing, obstructing or conducting sound in acoustic devices
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/32—Special longitudinal shape, e.g. for advertising purposes
    • H01J61/327—"Compact"-lamps, i.e. lamps having a folded discharge path

Definitions

  • This invention relates to an ultrasonic transducer capable of transmitting and / or receiving ultrasonic waves.
  • FIG. 15 Such a transducer is shown in Fig. 15, in which reference numeral 1 designates a swing case which is formed of metal such as stainless steel and is composed of a cylindrical side plate 1b and an upper plate 1a which is so at one end of the side plate 1b it is intended to complete them.
  • 2 designates a piezoelectric ceramic disk which is connected to the inner wall of the top plate 1a for the purpose of a common vibration, thereby producing an integrated connection.
  • the ceramic disc 2 is provided on its opposite sides with a pair of electrodes 2a and 2b.
  • the open end section of the oscillating housing 1 is closed by a cover plate 3.
  • a pair of end terminal pins 4a and 4b are provided, one end of which is lead wire 5a and 5b are connected to the electrodes 2a and 2b.
  • 6 denotes an insulating layer, which is formed, for example, from an epoxy resin in order to seal the oscillating housing 1.
  • the piezoelectric ceramic disk 2 When an electric field is applied to the pins 4a and 4b to apply an AC voltage between the opposing electrodes 2a and 2b, the piezoelectric ceramic disk 2 is excited to longitudinal or bending vibrations so that an ultrasonic wave is generated from the top plate 1a in which the integrated ceramic disc 2 is integrated. On the other hand, when the top plate 1a receives an ultrasonic wave, the piezoelectric ceramic disk 2 deforms such that an output with an intensity corresponding to the incident ultrasonic wave is output from the electrodes 2a and 2b.
  • the ultrasonic transducer of the type mentioned above has proven to be poorly suited for use as a proximity switch or sensor for the removal of a substance. Since the vibrating housing is formed from metal, the wave-transmitting and receiving section, which is formed from the top plate 1a and the piezoelectric ceramic disk 2, has such a high mechanical quality factor Q that, as shown in FIG. 16a, the transducer exhibits pulse characteristics, which have a long pulse decay time. It is therefore possible that when the transducer receives an ultrasound wave that has been reflected from the nearest substance during the transmission of the ultrasound wave, it is unable to function as a sensor or detector.
  • the resulting transducer has superior wave transmission and reception properties, in particular an improved response behavior, compared to that transducer whose oscillating housing is made of a non-porous plastic.
  • an ultrasonic transducer having a vibrating housing member having a cylindrical side plate and a shaft transmitting and receiving top plate provided at one end of the side plate, a piezoelectric element which is integrally formed with the inner wall of the Top plate is connected, and electrodes, which are arranged on the piezoelectric element, so that ultrasonic waves can be generated from the top plate when an electric field is applied to the electrodes, and / or an electrical output from the electrodes is given when the top plate Receives ultrasonic waves, wherein the top plate is made of a porous plastic.
  • FIGS. 1 and 2 form an embodiment of the ultrasonic transducer according to the invention.
  • those components which correspond to those in FIG. 15 are designated with the same reference numerals, to which, however, 10 has been added.
  • the exemplary embodiment shown in FIGS. 1 and 2 differs from the conventional converter shown in FIG. 15 in that the oscillating housing 11 of FIGS. 1 and 2 is formed from a porous plastic.
  • a piezoelectric element 12 with electrodes 12a and 12b is bonded to the inner surface of an upper plate 11a of the housing part 11 to form an integrated component.
  • the housing part 11 has a cylindrical side plate 11b which is integrally connected to the top plate 11a.
  • the open end portion of the housing part 11 is provided with a cover plate 13 to which a pair of terminal pins 14a and 14b are attached.
  • Lead wires 15a and 15b extend between electrode 12a and pin 14a and between electrode 12b and pin 14b, respectively.
  • the cover plate 13 is covered with an insulating layer 16.
  • Denoted at 17 is an insulator which is provided when the cover plate is formed from an electrical conductor in order to provide the insulation between the two connection pins 14a and 14b.
  • both the top plate 11a and the side plate 11b are formed from porous plastic.
  • porous plastic as used herein is intended to include a synthetic polymeric material that has a large number of closed cells distributed within the polymeric material.
  • suitable porous plastics are synthetic polymer materials in which a large number of glass microballoons are distributed, and foamed synthetic polymer materials materials which are produced using foaming agents in a conventional manner.
  • the porous plastic preferably has an average pore diameter which is between 50 and 100 ⁇ .
  • suitable polymer materials are epoxy resins, polyolefin resins, styrene resins, acrylic resins and vinyl chloride resins.
  • the vibrating case 11 of the present invention is molded from porous plastic, so that the Q m of the wave transmitting and receiving portion of the ultrasonic transducer of this invention is low, so that the pulse rise and fall times can be shortened as shown in Fig. 16b is.
  • the reduction in the pulse decay time advantageously leads to a reduction in the reverberation time.
  • the top plate 11a contains a relatively large amount of air, the acoustic impedance of the top plate 11a approaches that of air. Therefore, the fitting conditions between the top plate 11a and the ambient air are improved, which leads to an improvement in response, that is, a more intense output can be obtained after receiving an ultrasonic wave of constant intensity.
  • the conventional ultrasonic transducer whose housing is made of stainless steel, a pulse rise time of 0.5 ms, a pulse fall time of 2.0 ms and an output voltage of 0.4 V.
  • An ultrasonic transducer, the oscillating housing of which is made of non-porous epoxy resin provides a pulse rise time of 0.2 mA, a pulse fall time of 1.2 ms and an output voltage of 2.6 V.
  • the oscillating body is formed of an epoxy resin, in which a large Distributed number of glass microballoons that have a diameter of 50 to 100 microns, there is a pulse rise and fall time of 0.2 or 1.2 ms, and the output voltage is 6.4 V.
  • the thickness of the top plate 11 a of the vibrating housing 11 is about 1/4 of the wavelength of the speed of sound of the top plate 11 a, for the reason of achieving the best response.
  • both the top plate 11a and the cylindrical side plate 11b are molded from solid plastic. A similar improvement can be obtained even if the top plate is molded from a porous plastic alone.
  • a cylindrical side plate 11b is integrally provided at one end with a top plate 11a molded from porous plastic of the type just mentioned.
  • the other designs of the transducer are substantially the same as in the embodiment of Figs. 1 and 2, and their detailed explanation is omitted here.
  • 4 and 5 depict exemplary embodiments similar to that of FIG. 3.
  • the outer periphery of the top plate 11a is in contact with the inner surface of the cylindrical side plate 11b.
  • the end portion of the top plate 11a and the side plate 11b are cut together diagonally for abutment engagement.
  • the top plate 11a can be attached to the side plate 11b by any known means, such as glue.
  • the cylindrical side plate 11b is preferably molded from a material whose acoustic impedance is greater than that of the top plate 11a, for the purpose of achieving a reduction in reverberation time.
  • a suitable material for the side plate 11b are plastics, metals and ceramic materials. If both the top plate and the side plate of the vibrating housing are molded from a porous plastic, then the vibration on the side of the vibrating housing 11 is not completely damped, and the reverberation time cannot be reduced below a certain limit.
  • the vibration of the top plate 11a at the interface between the top plate 11a and the side plate 11b reflects and distributes and is prevented from proceeding to the side plate 11b.
  • the reverberation time becomes shorter compared to the transducer in which the vibrating housing is completely molded from porous plastic.
  • the ultrasonic transducer whose oscillating housing is formed from porous plastic with an acoustic impedance of 1 x 3000 g / cm z s, shows a wave-transmitting pulse characteristic as shown by line 20 in FIG. 6.
  • the vibrating housing is formed from a cylindrical side plate, which is formed from stainless steel with an acoustic impedance of 7.8 x 5000 g / cm 2 s, and an upper plate, which is made of a porous plastic with 1 x 3000 g / cm z s is shaped on acoustic impedance, then the transducer provides the pulse characteristic as shown by the broken line 21 in FIG. 6. This means that the reverberation time can be reduced to less than 1.0 ms.
  • Such a reduction in reverberation time can also be accomplished by providing an integrated tubular part or parts on the outer and / or inner circumference of the cylindrical side plate of the transducer shown in Figs. 1 and 2, wherein the tubular part has a higher acoustic impedance than the cylindrical side plate.
  • a tubular member 18 is provided within a swing housing and bonded to the inner periphery of its cylindrical side plate 11b.
  • the tubular member 18 is adhered to the outer periphery of the side plate 11b.
  • tubular member 18 improves wire eieschwingungsdämpfende effect on the side of the oscillating body, in order to reduce the reverberation time.
  • Attachment of tubular member 18 to side plate 11b can be accomplished by any known means, such as glue.
  • the tubular part 1 is provided within the housing 11, then it is expedient to design the tubular part as an elastic tube, generally a metal tube which has a slot 18a which extends parallel to the axis of the tube.
  • the tube 18 has a larger outer diameter than the inner diameter of the side plate 11b in the free state.
  • the tubular member 18 is provided outside the housing 11, it is possible to use an elastic tube, such as a rubber tube, which has a smaller inner diameter than the outer diameter of the cylindrical side plate 11b. By fitting the rubber tube 18 around the circumference of the side plate 11b, the tube is held in pressure contact with the side plate 11b.
  • the elastic tubular member it is not necessary for the tubular member to be made of a material having a greater acoustic impedance than the side plate 11b because of the fact that the side plate 11b is always the same. Forces in the direction perpendicular to the axis of the cylindrical. The side plate 11b is exposed and is prevented from vibrating.
  • the thickness of the top plate 11a is suddenly changed at a ring portion near the outer periphery of the piezoelectric disk 12 by the transverse vibration that is circumferential be wedge-shaped).
  • the height of the raised portion 11c and the depth of the annular groove 11d are not larger than 1/3 of the thickness D of the top plate 11a to prevent a decrease in responsiveness.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Mechanical Engineering (AREA)
  • Transducers For Ultrasonic Waves (AREA)
EP84112594A 1984-02-21 1984-10-18 Transducteur à ultrasons Expired - Lifetime EP0178346B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8484112594T DE3486035D1 (de) 1984-10-18 1984-10-18 Ultraschallwandler.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2434684U JPS60136599U (ja) 1984-02-21 1984-02-21 超音波セラミツクセンサ
JP2648784U JPS60139399U (ja) 1984-02-24 1984-02-24 超音波セラミツクセンサ
JP5034784U JPS60163899U (ja) 1984-04-06 1984-04-06 超音波セラミツクセンサ

Publications (2)

Publication Number Publication Date
EP0178346A1 true EP0178346A1 (fr) 1986-04-23
EP0178346B1 EP0178346B1 (fr) 1993-01-13

Family

ID=27284612

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84112594A Expired - Lifetime EP0178346B1 (fr) 1984-02-21 1984-10-18 Transducteur à ultrasons

Country Status (5)

Country Link
US (1) US4556814A (fr)
EP (1) EP0178346B1 (fr)
DE (1) DE3505872C2 (fr)
DK (1) DK168317B1 (fr)
FR (1) FR2559985B1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4914959A (en) * 1987-04-24 1990-04-10 Den Norske Stats Oljeselskap A.S. Ultrasonic flow meter using obliquely directed transducers
US4945276A (en) * 1987-04-24 1990-07-31 Den Norske Stats Oljeselskap A.S. Transducer for arranging in a fluid, particularly for the measurement of the flow-velocity of a fluid in a pipe, by transmitting/receiving sonic pulses
EP0361757A3 (fr) * 1988-09-29 1991-09-25 British Gas plc Dispositif d'adaptation
WO1995007529A1 (fr) * 1993-09-10 1995-03-16 Siemens Aktiengesellschaft Transducteur ultrasonore a adaptateur
DE19512417A1 (de) * 1995-04-03 1996-10-10 Marco Systemanalyse Entw Piezoelektrischer Ultraschallwandler
WO1997026646A1 (fr) * 1996-01-18 1997-07-24 Itt Automotive Europe Gmbh Transducteur ultrasonique pourvu d'un corps d'amortissement
WO1998004361A1 (fr) * 1996-07-26 1998-02-05 Siemens Aktiengesellschaft Transducteur ultrasonique a element d'adaptation quart d'onde en forme de disque
RU2285355C2 (ru) * 2004-03-05 2006-10-10 Санкт-Петербургский государственный университет Ультразвуковой пьезопреобразователь с сухим акустическим контактом
WO2017005686A1 (fr) * 2015-07-07 2017-01-12 Valeo Schalter Und Sensoren Gmbh Capteur à ultrasons pour un véhicule automobile, véhicule automobile ainsi que procédé de fabrication d'un capteur à ultrasons

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DE3545381C2 (de) * 1985-12-20 1994-02-24 Siemens Ag Ultraschallwandler zur Messung der Schalleistung eines fokussierten Ultraschallfeldes
JPH0749914Y2 (ja) * 1986-01-29 1995-11-13 株式会社村田製作所 超音波トランスデユ−サ
US4770038A (en) * 1986-02-13 1988-09-13 The United States Of America As Represented By The Administrator Of National Aeronautics And Space Administration Ultrasonic depth gauge for liquids under high pressure
JPH057835Y2 (fr) * 1986-06-10 1993-02-26
US4783997A (en) * 1987-02-26 1988-11-15 Panametrics, Inc. Ultrasonic transducers for high temperature applications
DE8805953U1 (de) * 1988-05-05 1988-07-07 Höntzsch GmbH, 71334 Waiblingen Elektroakustischer Wandler
DE4120681A1 (de) * 1990-08-04 1992-02-06 Bosch Gmbh Robert Ultraschallwandler
DE4028315A1 (de) * 1990-09-06 1992-03-12 Siemens Ag Ultraschallwandler fuer die laufzeitmessung von ultraschall-impulsen in einem gas
US5121628A (en) * 1990-10-09 1992-06-16 Merkl Arthur W Ultrasonic detection system
US5285789A (en) * 1992-04-21 1994-02-15 Hewlett-Packard Company Ultrasonic transducer apodization using acoustic blocking layer
DE29611678U1 (de) * 1996-07-04 1997-08-07 Siemens AG, 80333 München Schallwandler, insbesondere Ultraschallwandler
JPH10294995A (ja) * 1997-04-21 1998-11-04 Matsushita Electric Ind Co Ltd 防滴型超音波送信器
JP3596364B2 (ja) * 1999-08-05 2004-12-02 松下電器産業株式会社 超音波送受波器および超音波流れ計測装置
JP3501100B2 (ja) * 2000-05-15 2004-02-23 株式会社村田製作所 超音波送受波器
JP3768789B2 (ja) * 2000-09-07 2006-04-19 アルプス電気株式会社 超音波振動子及びウエット処理用ノズル並びにウエット処理装置
DE10156259A1 (de) 2001-11-09 2003-05-22 Valeo Schalter & Sensoren Gmbh Ultraschallsensor und Verfahren zur Herstellung eines Ultraschallsensors
JP3944052B2 (ja) * 2001-12-27 2007-07-11 株式会社デンソー 超音波送受波器及びこれを用いた超音波クリアランスソナー
JP3633926B2 (ja) * 2002-01-28 2005-03-30 松下電器産業株式会社 超音波送受信器および超音波流量計
JP4007128B2 (ja) * 2002-03-22 2007-11-14 株式会社豊田中央研究所 圧力センサ及びセンサユニット
US6788620B2 (en) * 2002-05-15 2004-09-07 Matsushita Electric Industrial Co Ltd Acoustic matching member, ultrasound transducer, ultrasonic flowmeter and method for manufacturing the same
JP4048886B2 (ja) * 2002-09-10 2008-02-20 株式会社村田製作所 超音波センサ
WO2004025832A1 (fr) * 2002-09-12 2004-03-25 Philips Intellectual Property & Standards Gmbh Resonateur a ondes acoustiques de masse equipe de moyens de suppression des ondulations passe-bande dans des filtres a ondes acoustiques de masse
US7075215B2 (en) * 2003-07-03 2006-07-11 Pathfinder Energy Services, Inc. Matching layer assembly for a downhole acoustic sensor
US7513147B2 (en) 2003-07-03 2009-04-07 Pathfinder Energy Services, Inc. Piezocomposite transducer for a downhole measurement tool
JP4503347B2 (ja) * 2004-04-28 2010-07-14 日本電波工業株式会社 超音波探触子の製造方法
DE102005001899B4 (de) * 2005-01-14 2007-03-08 Landis+Gyr Gmbh Ultraschallkopf
JP2006203563A (ja) * 2005-01-20 2006-08-03 Nippon Soken Inc 超音波センサ
US20060291677A1 (en) * 2005-06-09 2006-12-28 Airdigit Incorporation High-fidelity piezoelectric contact-type microphone structure
CN101243558B (zh) * 2005-08-12 2010-12-08 丹尼尔度量和控制公司 用于超声流量计的换能器壳体
US7307373B2 (en) * 2005-08-12 2007-12-11 Daniel Measurement And Control, Inc. Transducer assembly for an ultrasonic fluid meter
RU2450247C2 (ru) * 2005-08-12 2012-05-10 Дэниел Мэжэмэнт энд Кэнтроул, Инк. Ультразвуковой расходомер, блок преобразователя для него и способ замены блока преобразователя
JP4407767B2 (ja) * 2006-02-14 2010-02-03 株式会社村田製作所 超音波センサおよびその製造方法
DE102006028211A1 (de) * 2006-06-14 2007-12-20 Valeo Schalter Und Sensoren Gmbh Ultraschallsensor mit Membran
CN101529927B (zh) * 2006-10-20 2012-09-26 株式会社村田制作所 超声波传感器
DE102008003283A1 (de) * 2008-01-05 2009-07-09 Marquardt Gmbh Füllstandssensor
ES2458629T3 (es) * 2009-06-19 2014-05-06 Sonovia Holdings Llc Transductor de ultrasonidos de frecuencia dual
CN102726064B (zh) 2010-01-25 2015-07-15 株式会社村田制作所 超声波振动装置
US20130099791A1 (en) * 2011-10-24 2013-04-25 Baker Hughes Incorporated Methodologies to Improve Reliability of Transducer Electrical Interconnections
DE102012104109A1 (de) 2012-05-10 2013-11-14 Manroland Web Systems Gmbh Druckmaschinenzylinder, Druckmaschinenwalze und Herstellungsverfahren
DE102012211011A1 (de) * 2012-06-27 2014-01-02 Robert Bosch Gmbh Akustischer Sensor mit einer Membran aus einem Faserverbundwerkstoff
DE102012222239A1 (de) * 2012-12-04 2014-06-05 iNDTact GmbH Messeinrichtung und Bauteil mit darin integrierter Messeinrichtung
US20150090030A1 (en) * 2013-09-27 2015-04-02 Infineon Technologies Ag Transducer arrangement comprising a transducer die and method of covering a transducer die
US10935646B2 (en) 2014-02-27 2021-03-02 Simtrans Tech Inc Ultrasonic transducer with composite case
EP3172582B1 (fr) * 2014-07-22 2025-05-21 Brewer Science Inc. Capteur résistif à couche mince
DE102016107471B3 (de) * 2016-04-22 2017-09-14 Krohne Ag Ultraschallwandler mit Abstrahlelement
US11590535B2 (en) 2017-10-25 2023-02-28 Honeywell International Inc. Ultrasonic transducer
DE102017221618A1 (de) * 2017-10-27 2019-05-02 Continental Automotive Gmbh Ultraschallwandler mit zumindest einem piezo-elektrischen Oszillator
DE102018106333B4 (de) * 2018-03-19 2025-03-13 HELLA GmbH & Co. KGaA Sensorvorrichtung zur Erfassung von Schall, insbesondere zur Erfassung von Körperschall an einem Fahrzeug
GB2573305A (en) * 2018-05-01 2019-11-06 Tribosonics Ltd An ultrasonic transducer
CN110882882A (zh) * 2018-09-07 2020-03-17 新传思科技股份有限公司 具有复材壳体的超音波换能器
DE102020114777A1 (de) * 2020-06-03 2021-12-09 Tdk Electronics Ag Ultraschallwandler und Verfahren zum Betrieb eines Ultraschallwandlers
DE102024208914A1 (de) 2024-09-18 2026-03-19 Robert Bosch Gesellschaft mit beschränkter Haftung Ultraschallsensorvorrichtung, Park Assistenz-System und Fahrzeug

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Publication number Priority date Publication date Assignee Title
FR896806A (fr) * 1940-02-22 1945-03-05 Atlas Werke Ag Appareil oscillateur piézo-électrique
US3433461A (en) * 1967-05-22 1969-03-18 Edison Instr Inc High-frequency ultrasonic generators
US3555311A (en) * 1969-01-23 1971-01-12 Marquardt Corp High pressure piezoelectric transducer
FR2325266A1 (fr) * 1975-09-17 1977-04-15 Siemens Ag Transducteur a ultrason
EP0116823A1 (fr) * 1983-01-20 1984-08-29 Siemens Aktiengesellschaft Transducteur ultrasonique

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4914959A (en) * 1987-04-24 1990-04-10 Den Norske Stats Oljeselskap A.S. Ultrasonic flow meter using obliquely directed transducers
US4945276A (en) * 1987-04-24 1990-07-31 Den Norske Stats Oljeselskap A.S. Transducer for arranging in a fluid, particularly for the measurement of the flow-velocity of a fluid in a pipe, by transmitting/receiving sonic pulses
EP0361757A3 (fr) * 1988-09-29 1991-09-25 British Gas plc Dispositif d'adaptation
GB2225426B (en) * 1988-09-29 1993-05-26 Michael John Gill A transducer
WO1995007529A1 (fr) * 1993-09-10 1995-03-16 Siemens Aktiengesellschaft Transducteur ultrasonore a adaptateur
DE19512417A1 (de) * 1995-04-03 1996-10-10 Marco Systemanalyse Entw Piezoelektrischer Ultraschallwandler
WO1997026646A1 (fr) * 1996-01-18 1997-07-24 Itt Automotive Europe Gmbh Transducteur ultrasonique pourvu d'un corps d'amortissement
WO1998004361A1 (fr) * 1996-07-26 1998-02-05 Siemens Aktiengesellschaft Transducteur ultrasonique a element d'adaptation quart d'onde en forme de disque
US6104121A (en) * 1996-07-26 2000-08-15 Siemens Ag Ultrasonic transducer with a disk-shaped quarter wave length transformer
RU2285355C2 (ru) * 2004-03-05 2006-10-10 Санкт-Петербургский государственный университет Ультразвуковой пьезопреобразователь с сухим акустическим контактом
WO2017005686A1 (fr) * 2015-07-07 2017-01-12 Valeo Schalter Und Sensoren Gmbh Capteur à ultrasons pour un véhicule automobile, véhicule automobile ainsi que procédé de fabrication d'un capteur à ultrasons

Also Published As

Publication number Publication date
DE3505872A1 (de) 1985-11-21
DK76485A (da) 1985-08-22
DK168317B1 (da) 1994-03-07
FR2559985B1 (fr) 1989-06-30
DE3505872C2 (de) 1994-07-07
US4556814A (en) 1985-12-03
DK76485D0 (da) 1985-02-19
FR2559985A1 (fr) 1985-08-23
EP0178346B1 (fr) 1993-01-13

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