EP3600698A1 - Transducteur acoustique comprenant un élément transducteur piézocéramique intégré dans une membrane oscillante - Google Patents

Transducteur acoustique comprenant un élément transducteur piézocéramique intégré dans une membrane oscillante

Info

Publication number
EP3600698A1
EP3600698A1 EP18713224.6A EP18713224A EP3600698A1 EP 3600698 A1 EP3600698 A1 EP 3600698A1 EP 18713224 A EP18713224 A EP 18713224A EP 3600698 A1 EP3600698 A1 EP 3600698A1
Authority
EP
European Patent Office
Prior art keywords
transducer
transducer element
membrane
sound
sound transducer
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Withdrawn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
EP18713224.6A
Other languages
German (de)
English (en)
Inventor
Johannes HENNEBERG
Andre Gerlach
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3600698A1 publication Critical patent/EP3600698A1/fr
Withdrawn legal-status Critical Current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
    • B06B1/0644—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
    • B06B1/0666—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 used as a diaphragm
    • 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
    • B06B1/0651—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 of circular shape
    • 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
    • B06B1/0611—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 in a pile
    • 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
    • B06B1/0655—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 of cylindrical shape
    • 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
    • G10K11/004—Mounting transducers, e.g. provided with mechanical moving or orienting device
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/01—Manufacture or treatment
    • H10N30/02—Forming enclosures or casings
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/88—Mounts; Supports; Enclosures; Casings

Definitions

  • the invention relates to a sound transducer comprising a diaphragm pot, a transducer element and a housing, wherein the diaphragm pot has a membrane and a wall.
  • Ultrasonic sensors are used inter alia in automotive and
  • Objects in the environment can be detected by emitting an ultrasonic signal through the ultrasonic sensor and reflecting it from an object
  • Emission of the ultrasonic signal and receiving the ultrasonic echo and the known speed of sound can then be calculated the distance to the object.
  • the ultrasonic sensors typically include a sound transducer having a diaphragm, a transducer element, and a housing.
  • Transducer element is, for example, a piezoceramic
  • Membrane bottom is usually carried out by an adhesive process. This is prone to failure both in the manufacturing process and in operation.
  • the functional group of the ultrasonic sensor and the housing are manufactured as separate individual parts and then joined.
  • a sound transducer which has a resonator with at least one piezoelectric element.
  • the resonator is integrally formed as a diaphragm pot with a membrane and a circumferential surface of the same material.
  • the diaphragm pot is for example made of a polymer material such as polyvinylidene fluoride (PVDF) or a
  • piezoceramic material produced.
  • One or more regions of the membrane are polarized, so that piezoelectrically active regions are formed.
  • the invention is based on the object, a
  • a surge transducer in particular for
  • the sound transducer has a functional group, wherein the functional group has a diaphragm pot and at least one electroacoustic
  • Transducer element comprises.
  • the sound transducer has a housing (5).
  • the diaphragm pot comprises a vibratable membrane and a circumferential wall and at least one electroacoustic transducer element, wherein the transducer element is designed to excite the membrane to oscillate and / or to convert vibrations of the membrane into electrical signals.
  • the diaphragm cup is formed of a plastic material, wherein according to the invention the at least one transducer element, in particular without additional adhesive layer, is integrated into the oscillatable diaphragm, wherein the transducer element is designed as a piezoceramic element.
  • the transducer element has on one or more surfaces electrodes for contacting and control. These can be considered electrically conductive
  • a transducer element integrated into the oscillatable membrane should be understood to mean that the transducer element initially exists as a separate component which is connected to the oscillating diaphragm during formation of the oscillatory diaphragm, for example by an injection molding method or a resin transfer molding method in that the plastic material of the membrane at least partially surrounds the transducer element.
  • thermoset a thermoplastic
  • thermoplastic a thermoplastic
  • Particularly suitable as plastic materials are epoxy resins.
  • the thus formed sensor can be both for receiving and for transmitting sound, in particular
  • Ultrasound to be used.
  • the design of a particular desired waveform and frequency can be achieved by geometric design in the membrane.
  • regions of the membrane with different thickness or material thickness can be formed.
  • Usual operating frequencies are in the range between 20 and 250 kHz, frequencies in the range of 30 to 80 kHz are particularly well suited.
  • the oscillatory membrane may have areas of reduced thickness and / or areas of increased thickness.
  • the membrane preferably has a thickness or material thickness in the range from 0.15 mm to 5 mm, particularly preferably from 0.2 to 1 mm.
  • Transducers designed according to the invention can thus be used advantageously in sensors for distance determination, e.g. find by means of air ultrasound. A use for distance determination in liquids is also conceivable. Due to the one-piece design and the resulting robustness against environmental influences inventively designed sound transducer are particularly suitable for use in the automobile.
  • the housing and the functional group of the sound transducer are integrally formed or as a component.
  • An inventively designed transducer can be used for electrical
  • the conductors e.g. be electrically connected by means of a plug connection with a trained for generating and / or evaluation of the signals control unit.
  • Transducer element is disc-shaped and has a first surface and a first surface opposite the second surface.
  • the transducer element is integrated into the membrane in such a way that the second surface is exposed in the direction of the interior of the diaphragm pot.
  • This embodiment has the advantage that, as a result of the second surface of the transducer element exposed to the inside, it can be electrically contacted in a simple manner. At least one electrical conductor in this embodiment can be contacted directly on the exposed second surface.
  • the piezoceramic element in this embodiment is preferably formed such that both electrodes from the same side, i. the same
  • the electrode is carried out over its entire surface on the first surface connected to the membrane and guided over the edge of the piezoceramic element to the second surface, where it forms a contact surface.
  • At least one transducer element is disk-shaped and has a first surface and a second surface opposite the first surface.
  • the transducer element is preferably integrated into the membrane in such a way that the first surface is exposed in the emission direction of the diaphragm pot.
  • Radiating direction is understood to be that direction perpendicular to the extension of the membrane, in which a sound signal is preferably emitted when the membrane is excited to mechanical vibrations.
  • This arrangement of the transducer element has the advantage of a direct coupling of the piezoelectric element to the surrounding fluid. This is an advantage especially for fluids with high density.
  • the contacting can be done in this embodiment by order contact on an opposite second surface.
  • the method comprises, in particular, the following steps: a) at least one element designed as a piezoceramic element
  • Transducer element is introduced into a cavity of a plastic processing tool, b) a plastic material is injected into the cavity, wherein the transducer element is at least partially enclosed by the plastic material, whereby a diaphragm pot is formed with a vibratable membrane and a wall, wherein the at least one traveling element in the oscillatory membrane is integrated.
  • Plastic processing tool is introduced.
  • the piezoceramic element is first introduced into the cavity and then the plastic material is injected.
  • the electrical contacting of the piezoceramic element can in particular prior to introduction into the cavity of the
  • Plastic processing tool done, for example by means of soldering, bonding or thermo-compression welding of pins, wires or other electrical conductors.
  • the electrical contacts are doing by suitable Sealing measures protected from wetting with plastic to allow subsequent electrical connections.
  • the manufacturing method according to the invention enables the simple and economical production of a swirl converter, e.g. for one
  • piezoceramic elements as transducer elements.
  • an error-prone adhesive connection for coupling an electro-acoustic or electro-mechanical transducer element can be dispensed with during manufacture, resulting in a simplified build-up process. Since that
  • Plastic material in the liquid state wets the piezoceramic element and then cured, results in a reliable adhesion between the plastic material and the piezoceramic element that the
  • Transducer element of the transducer thus produced represents. This reliable adhesion leads to a high reproducibility of the
  • vibration mechanical properties of the transducer since no e.g. In their adhesive layer thickness, adhesive properties or the course of the adhesive layer by applying an adhesive partner tolerance-sensitive adhesive layers are necessary, the robustness and reproducibility of the vibration mechanical properties of the transducer is further increased.
  • Plastic processing tool designed such that in step b) the functional group is integrally formed with a housing of the sound transducer. Due to the one-piece, in particular, the advantages that the finished component increased resistance to environmental influences such. B. has the ingress of moisture or dirt, and also reduce the number of components of the transducer and the number of required steps for assembling the transducer.
  • FIG. 1 a shows schematically a sound transducer according to a first embodiment of the invention.
  • FIG. 1 b) shows an enlarged view of the functional group of the sound transducer according to FIG. 1 a).
  • Figure 2 shows schematically a functional group of a sound transducer according to a second embodiment of the invention.
  • Figure 3 a shows schematically a sound transducer according to a third embodiment of the invention.
  • FIG. 3 b shows an enlarged view of the functional group of the sound transducer according to FIG. 3 a).
  • Figure 4 shows schematically a sound transducer according to a fourth embodiment of the invention.
  • Figures 5 a) -c) show enlarged views of a possible embodiment of a transducer element for a sound transducer according to one of the embodiments of the invention shown in Figures 1-4.
  • FIG. 6 shows schematically a flow diagram of a possible embodiment of a method according to the invention
  • FIG. 1 a schematically shows a section through a surge transducer 1 according to a first embodiment of the invention.
  • the sound transducer has a housing 5 with a connector housing 11.
  • the surge transducer comprises a functional group 2, which is integral with the housing.
  • the functional group comprises a diaphragm pot 6 with a
  • the Membrane 8 may be formed, for example, circular or elliptical.
  • the membrane has areas 4 with a reduced wall thickness. Due to the geometric design of these areas, the vibration behavior and the resonant frequency of the transducer are determined.
  • the diaphragm pot 6 is made in one piece in this example. Continues the circulating
  • the sound transducer 1 furthermore has a transducer element 3, which according to the invention is designed as a piezoceramic element and is integrated into the oscillatory membrane 8.
  • the functional group 2 of the transducer 1 according to the first embodiment is shown enlarged.
  • the transducer element 3 is formed in this example as a disc having a first surface 15, a first surface opposite the second surface 13 and a circumferential side surface 14.
  • the transducer element 3 is integrated into the membrane such that the second surface 13 in the direction of the interior 16 of the diaphragm pot 6 is exposed.
  • the transducer element is integrated into the membrane 8 such that both the first surface 15 and the side surface 14 of the
  • Transducer element 3 are completely enclosed by the plastic material of the membrane 8, such that the second surface 13 flush with the
  • Transducer element 3 is formed in this embodiment such that both electrodes are from the same side, i. the same surface, can be contacted electrically.
  • FIG. 5 a) shows the transducer element 3 in plan view of the first surface 15.
  • FIG. 5 b) shows a section through the transducer element 3.
  • FIG. 5 c) shows the transducer element 3 formed as a piezoceramic element in plan view onto the second surface 13.
  • the first surface 15 of the transducer element 3 is covered with an electrode layer 25 which extends over the whole area in this example.
  • the transducer element 3 has a UmWallet réelle 25 'on the side surface 14 by means of which the first electrode 25 via the edge of the piezoceramic element on the second surface 13 is guided, where it forms a contact surface 25 ".
  • a second electrode 23 is formed on the second surface 13.
  • electrical conductors 18 for driving the transducer element 3 for example by soldering or bonding.
  • FIG. 2 shows the functional group 2 of a sound transducer 1 according to a second embodiment of the invention is shown enlarged.
  • Transducer element 3 is formed in this example as a disc, with a first surface 15 and one of the first surface opposite, second
  • the transducer element 3 is integrated into the membrane in such a way that the first surface 15 is exposed in the emission direction 17 of the sound transducer 1.
  • the electrodes for contacting the transducer element can in this case be formed in the same or an equivalent manner as illustrated in connection with FIG.
  • the electrical conductors, e.g. Wires or pins may for example be passed through the plastic material of the membrane 8.
  • FIG. 3 a schematically shows a section through a surge transducer 1 according to a third embodiment of the invention.
  • the sound transducer in turn has a housing 5 with a connector housing 11.
  • Schwallwandler comprises a functional group 2, which is integral with the
  • the functional group comprises a diaphragm pot 6 with a vibratable membrane 8 and a circumferential wall 7.
  • the sound transducer 1 further comprises a transducer element 3, the
  • According to the invention is designed as a piezoceramic element and is integrated into the oscillatory membrane 8.
  • the functional group 2 of the transducer 1 according to the third embodiment is shown enlarged.
  • the transducer element 3 is also formed in this example as a disc having a first surface 15, a first surface opposite the second surface 13 and a circumferential side surface 14.
  • the transducer element 3 is integrated into the membrane such that the second surface 13 in the direction of the interior 16 of the
  • piezoceramic element is easier to place in the cavity and fix. Furthermore, this arrangement results in an increased distance of the transducer element to the neutral fiber (zero line)).
  • FIG. 4 schematically shows a section through a surge transducer 1 according to an exemplary fourth embodiment of the invention.
  • the structure of the sound transducer 1 according to the fourth embodiment of the invention substantially corresponds to the structure of that described in connection with Figure 3
  • regions 4 'of the membrane have an increased thickness (material accumulation). Due to the configuration of the regions 4 ', the resonance frequency of the sound transducer and the directional characteristic of the sound transducer can be adjusted.
  • the regions 4 ' can be arranged uniformly (symmetrically) or unevenly (asymmetrically).
  • FIG. 6 illustrates the sequence of a production method according to the invention for a functional group of a sound transducer according to the invention.
  • a plastic processing tool is provided with a cavity whose shape is adapted to the desired shape of the sound transducer.
  • a piezoceramic element which is provided as a transducer element, is introduced into the cavity.
  • electrical conductors can already be provided which contact the electrodes of the piezoceramic element.
  • step 300 a plastic material, for example an epoxy resin, is injected into the cavity, whereby at least the functional group of the
  • Sound transducer is formed and whereby the piezoceramic element is at least partially enclosed by the plastic material. If the cavity is designed accordingly not only the functional group of the Schallwandlers, but also the housing are formed in a component.
  • step 400 if appropriate after a solidification period, the functional group or the component comprising the functional group and the housing of the sound transducer is removed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Manufacturing & Machinery (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)

Abstract

L'invention concerne un transducteur acoustique, en particulier pour un capteur à ultrasons. Ce transducteur acoustique (1) comporte un groupe fonctionnel (2) comprenant une membrane en forme de godet (6) et au moins un élément transducteur électroacoustique (3). En outre, le transducteur acoustique (1) présente un boîtier (5). La membrane en forme de godet (6) comprend une membrane oscillante (8) et une paroi périphérique (7) ainsi qu'au moins un élément transducteur électroacoustique (3), l'élément transducteur (3) étant conçu pour exciter la membrane (8) de façon à la faire osciller et/ou pour convertir les oscillations de la membrane (8) en signaux électriques. La membrane en forme de godet (6) est réalisée en matière plastique. Selon l'invention, ledit au moins un élément transducteur (3) est intégré dans la membrane oscillante (8), notamment sans couche d'adhésif supplémentaire, et se présente sous la forme d'un élément piézocéramique.
EP18713224.6A 2017-03-30 2018-03-23 Transducteur acoustique comprenant un élément transducteur piézocéramique intégré dans une membrane oscillante Withdrawn EP3600698A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017205375.5A DE102017205375A1 (de) 2017-03-30 2017-03-30 Schallwandler
PCT/EP2018/057486 WO2018177945A1 (fr) 2017-03-30 2018-03-23 Transducteur acoustique comprenant un élément transducteur piézocéramique intégré dans une membrane oscillante

Publications (1)

Publication Number Publication Date
EP3600698A1 true EP3600698A1 (fr) 2020-02-05

Family

ID=61768323

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18713224.6A Withdrawn EP3600698A1 (fr) 2017-03-30 2018-03-23 Transducteur acoustique comprenant un élément transducteur piézocéramique intégré dans une membrane oscillante

Country Status (6)

Country Link
US (1) US11583896B2 (fr)
EP (1) EP3600698A1 (fr)
JP (1) JP6891293B2 (fr)
CN (1) CN110475621B (fr)
DE (1) DE102017205375A1 (fr)
WO (1) WO2018177945A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019116080A1 (de) * 2019-06-13 2020-12-17 USound GmbH MEMS-Schallwandler mit einer aus Polymer ausgebildeten Membran
DE102020204255A1 (de) * 2020-04-01 2021-10-07 Robert Bosch Gesellschaft mit beschränkter Haftung Membrantopf
DE102020206431A1 (de) * 2020-05-25 2021-11-25 Robert Bosch Gesellschaft mit beschränkter Haftung Membrantopf

Family Cites Families (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5359445U (fr) * 1976-10-21 1978-05-20
JPS5359445A (en) 1976-11-09 1978-05-29 Komatsu Mfg Co Ltd Device for observing surface of gear
JPS5994493A (ja) 1982-11-20 1984-05-31 三菱電機株式会社 電子部品を有する回路基板装置
JPS5994493U (ja) * 1982-12-16 1984-06-27 日本特殊陶業株式会社 超音波送受波器
US4725994A (en) 1984-06-14 1988-02-16 Kabushiki Kaisha Toshiba Ultrasonic transducer with a multiple-folded piezoelectric polymer film
JPS6396460A (ja) 1986-10-14 1988-04-27 株式会社荏原製作所 ヒ−トポンプ用蒸発器
JPS6396460U (fr) * 1986-12-12 1988-06-22
DE3732412A1 (de) 1987-09-25 1989-04-13 Siemens Ag Ultraschallwandler mit astigmatischer sende-/empfangscharakteristik
EP0477575A1 (fr) * 1990-09-25 1992-04-01 Siemens Aktiengesellschaft Convertisseur ultrasonique, en particulier pour la mesure de flux d'air et de gaz, et son procédé de fabrication
EP0498015B1 (fr) * 1991-02-07 1993-10-06 Siemens Aktiengesellschaft Procédé de fabrication de transducteurs ultrasonores
JPH05244692A (ja) * 1992-02-28 1993-09-21 Matsushita Electric Works Ltd 超音波マイクロホン
JP2000121739A (ja) 1998-10-16 2000-04-28 Murata Mfg Co Ltd 超音波センサ、およびその製造方法
JP2003143685A (ja) 2001-11-07 2003-05-16 Murata Mfg Co Ltd 音響整合層の製造方法およびそれを用いて製造された音響整合層
JP4542739B2 (ja) 2002-03-22 2010-09-15 日本特殊陶業株式会社 超音波センサ
JP2006203563A (ja) 2005-01-20 2006-08-03 Nippon Soken Inc 超音波センサ
US7307373B2 (en) * 2005-08-12 2007-12-11 Daniel Measurement And Control, Inc. Transducer assembly for an ultrasonic fluid meter
DE102006028214A1 (de) 2006-06-14 2007-12-20 Valeo Schalter Und Sensoren Gmbh Ultraschallsensor, insbesondere Kraftfahrzeug-Ultraschallsensor
DE102007010500A1 (de) 2007-03-05 2008-09-11 Robert Bosch Gmbh Ultraschallwandler mit direkt eingebettetem Piezo
JP2009194801A (ja) * 2008-02-18 2009-08-27 Seiko Epson Corp 音声出力装置
US7982366B2 (en) 2008-12-16 2011-07-19 Tung Thih Electronic Co., Ltd. Ultrasound transducer with a dumbbell-shaped chamber
KR101545271B1 (ko) 2008-12-19 2015-08-19 삼성전자주식회사 압전형 음향 변환기 및 이의 제조방법
JP5339093B2 (ja) * 2010-09-08 2013-11-13 株式会社村田製作所 超音波トランスジューサ
DE102012201884A1 (de) 2012-02-09 2013-08-14 Robert Bosch Gmbh Schallwandler
TWI454668B (zh) * 2012-02-21 2014-10-01 Tung Thih Electronic Co Ltd Ultrasonic sensor device
DE102012208059B4 (de) * 2012-05-14 2022-05-12 Robert Bosch Gmbh Trägerelement mit integrierter Sensoreinheit
DE102012208292A1 (de) 2012-05-16 2013-11-21 Robert Bosch Gmbh Verfahren zur Herstellung eines Ultraschall-Wandlerkerns mit eingebettetem piezoelektrischem Wandlerelement
DE102012209238A1 (de) 2012-05-31 2013-12-05 Robert Bosch Gmbh Ultraschallsensor sowie Vorrichtung und Verfahren zur Messung eines Abstands zwischen einem Fahrzeug und einem Hindernis
DE102013211533A1 (de) 2013-06-19 2014-12-24 Robert Bosch Gmbh Ultraschallwandler und Verfahren zum Betrieb eines Ultraschallwandlers
DE102013220076A1 (de) 2013-10-02 2015-04-02 Schaeffler Technologies Gmbh & Co. Kg Schaltbares Abstützelement
DE102013222076A1 (de) 2013-10-30 2015-04-30 Robert Bosch Gmbh Schallwandler und Herstellungsverfahren für einen Schallwandler
JP6297204B2 (ja) 2015-03-12 2018-03-20 富士フイルム株式会社 高分子複合圧電体、電気音響変換フィルムおよび電気音響変換器
DE102015106044A1 (de) 2015-04-21 2016-10-27 Valeo Schalter Und Sensoren Gmbh Ultraschallsensor für ein Kraftfahrzeug aus hochgefülltem Kunststoff, Fahrerassistenzsystem, Kraftfahrzeug sowie Verfahren
JP2016214177A (ja) 2015-05-22 2016-12-22 陣内金型工業株式会社 植物栽培用容器
DE102015110939B4 (de) 2015-07-07 2019-02-14 Valeo Schalter Und Sensoren Gmbh Ultraschallsensor für ein Kraftfahrzeug, Kraftfahrzeug sowie Verfahren zum Herstellen eines Ultraschallsensors

Also Published As

Publication number Publication date
US11583896B2 (en) 2023-02-21
DE102017205375A1 (de) 2018-10-04
US20210101179A1 (en) 2021-04-08
WO2018177945A1 (fr) 2018-10-04
JP2020511906A (ja) 2020-04-16
JP6891293B2 (ja) 2021-06-18
CN110475621B (zh) 2022-02-11
CN110475621A (zh) 2019-11-19

Similar Documents

Publication Publication Date Title
EP2559024B1 (fr) Procédé pour commander un capteur ultrasonore et capteur ultrasonore
EP3600698A1 (fr) Transducteur acoustique comprenant un élément transducteur piézocéramique intégré dans une membrane oscillante
EP2660627B1 (fr) Ensemble de détection comprenant un composant de véhicule plat et un capteur à ultrasons
WO2011073414A2 (fr) Ensemble oscillant pour transducteur ultrasonore et procédé de fabrication de cet ensemble oscillant
WO2014202333A1 (fr) Dispositif de détection d'environnement comprenant un transducteur ultrasonore et véhicule automobile équipé d'un dispositif de détection d'environnement de ce type
EP3010651B1 (fr) Dispositif de détection d'environnement comprenant un transducteur ultrasonore modulaire et véhicule automobile équipé d'un dispositif de détection d'environnement de ce type
EP3020038B1 (fr) Ensemble transducteur acoustique
WO2013139550A1 (fr) Capteur d'ultrasons et procédé de mesure de la distance d'un objet
WO2014202335A1 (fr) Convertisseur électroacoustique
EP2850398B1 (fr) Procédé de fabrication d'un transducteur à ultrasons avec élément piézoélectrique noyé dans une résine
WO2016008781A1 (fr) Dispositif de capteur ultrasonique pour un véhicule automobile, système d'assistance à la conduite ainsi que véhicule automobile
DE102009040028B4 (de) Ultraschallwandler und Verfahren zur Herstellung eines Ultraschallwandlers
EP2937857A2 (fr) Membrane pour un transducteur d'ultrasons et transducteur d'ultrasons
DE102017209823A1 (de) Ultraschallsensor
EP3600697B1 (fr) Transducteur acoustique comprenant un élément transducteur intégré dans une membrane oscillante et comportant un polymère électroactif
DE102013222076A1 (de) Schallwandler und Herstellungsverfahren für einen Schallwandler
WO2019057375A1 (fr) Transducteur acoustique
DE102017109159A1 (de) Ultraschallwandlereinrichtung und Kontaktierungsverfahren
DE102018200315A1 (de) Schallwandler
DE102020206431A1 (de) Membrantopf
WO2019197268A1 (fr) Transducteur acoustique
WO2021197848A1 (fr) Corps de diaphragme

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

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

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

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

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

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20191030

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ROBERT BOSCH GMBH

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20210201

TPAC Observations filed by third parties

Free format text: ORIGINAL CODE: EPIDOSNTIPA

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20221001