DE102009040028B4 - Ultrasonic transducer and method for producing an ultrasonic transducer - Google Patents
Ultrasonic transducer and method for producing an ultrasonic transducer Download PDFInfo
- Publication number
- DE102009040028B4 DE102009040028B4 DE102009040028.1A DE102009040028A DE102009040028B4 DE 102009040028 B4 DE102009040028 B4 DE 102009040028B4 DE 102009040028 A DE102009040028 A DE 102009040028A DE 102009040028 B4 DE102009040028 B4 DE 102009040028B4
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- DE
- Germany
- Prior art keywords
- membrane
- ultrasonic transducer
- vibration generator
- pieozokeramik
- piezoceramic
- 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.)
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- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000012528 membrane Substances 0.000 claims abstract description 74
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000000919 ceramic Substances 0.000 claims abstract 2
- 230000005284 excitation Effects 0.000 claims abstract 2
- 238000003856 thermoforming Methods 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000012790 adhesive layer Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000012799 electrically-conductive coating Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- IHQKEDIOMGYHEB-UHFFFAOYSA-M sodium dimethylarsinate Chemical class [Na+].C[As](C)([O-])=O IHQKEDIOMGYHEB-UHFFFAOYSA-M 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/521—Constructional features
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
Ultraschallwandler (1) mit einer Membran (2) und mit einem elektromechanischen Schwingungsgeber (Pieozokeramik 10) zur Schwingungsanregung der Membran (2), der über eine mechanische Verbindung mit der Membran (2) verbunden ist, wobei die mechanische Verbindung elektrisch leitend ausgebildet ist, wobei der Schwingungsgeber (Pieozokeramik 10) formschlüssig mit der Membran (2) verbunden ist und passgenau in eine Vertiefung (6) der Membran (2) eingreift, dadurch gekennzeichnet, dass die Membran (2) als Tiefziehteil ausgebildet ist und die Vertiefung (6) beim Tiefziehvorgang erzeugt worden ist.Ultrasonic transducer (1) with a membrane (2) and with an electromechanical vibration transmitter (piezoelectric ceramic 10) for vibration excitation of the membrane (2), which is connected via a mechanical connection to the membrane (2), wherein the mechanical connection is electrically conductive, wherein the vibration generator (piezoceramic 10) is positively connected to the membrane (2) and precisely fitting in a recess (6) of the membrane (2) engages, characterized in that the membrane (2) is formed as a deep-drawn part and the recess (6) has been produced during the deep-drawing process.
Description
Die Erfindung betrifft einen Ultraschallwandler sowie ein Verfahren zur Herstellung eines Ultraschallwandlers der im Oberbegriff des Anspruchs 1 bzw. 10 genannten Art.The invention relates to an ultrasonic transducer and a method for producing an ultrasonic transducer referred to in the preamble of
Ein derartiger Ultraschallwandler ist bereits aus der
Um dabei eine ausreichende elektrische Leitfähigkeit der Klebeverbindung herzustellen, wird in der gattungsgemäßen Druckschrift ein Verfahren zur Entfernung und Neubildung von Oxidschichten auf der Aluminiumoberfläche der Membran vorgeschlagen. Zur zuverlässigen Kontaktierung muss ferner eine gleichmäßige Dicke der Kleberschicht sichergestellt werden. Somit ist die Herstellung der Klebeverbindung verhältnismäßig aufwändig.In order to produce a sufficient electrical conductivity of the adhesive bond, a method for the removal and formation of oxide layers on the aluminum surface of the membrane is proposed in the generic document. For reliable contacting also a uniform thickness of the adhesive layer must be ensured. Thus, the production of the adhesive connection is relatively expensive.
Des Weiteren ist aus der
Aufgabe der Erfindung ist es, einen Ultraschallwandler der im Oberbegriff des Anspruchs 1 genannten Art dahingehend weiterzuentwickeln, dass bei einer als Tiefziehteil ausgebildeten Membran die elektrische Verbindung zwischen Membran und Schwingungsgeber verbessert ist.The object of the invention is to further develop an ultrasonic transducer referred to in the preamble of claim 1 such that in a trained as a deep-drawn part of the membrane, the electrical connection between the membrane and vibration generator is improved.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1 gelöst. Weitere die Erfindung in vorteilhafter Weise ausgestaltende Merkmale enthalten die Unteransprüche.This object is achieved by the features of claim 1. More embodying the invention in an advantageous manner features include the dependent claims.
Der mit der Erfindung erzielte Vorteil besteht darin, dass der Schwingungsgeber formschlüssig mit der Membran verbunden ist, so dass auf eine im Hinblick auf die elektrische Kontaktierung problematische Kleberschicht zwischen Membran und Piezoelement vollständig oder zumindest teilweise verzichtet werden kann.The advantage achieved by the invention is that the vibration generator is positively connected to the membrane, so that can be completely or at least partially dispensed with a problematic in terms of electrical contacting adhesive layer between the membrane and piezoelectric element.
Die formschlüssige Verbindung ermöglicht insbesondere, dass der Schwingungsgeber mit einer Kontaktfläche unmittelbar, d. h. ohne Zwischenschaltung einer Kleberschicht, an einem gegenüberliegenden Flächenbereich der Membran anliegt. Durch diese direkte Anlage der Kontaktfläche an der Membran wird eine zuverlässig elektrische leitende Verbindung zwischen Schwingungsgeber und Membran hergestellt. Die Kontaktfläche bildet dabei vorteilhafterweise einen elektrischen Kontaktbereich des Schwingungsgebers, wobei die Membran zumindest bereichsweise aus elektrisch leitendem Material hergestellt ist und eine elektrische Verbindung zum Anschluss des Schwingungsgebers bildet.The positive connection allows in particular that the vibration generator with a contact surface directly, d. H. without the interposition of an adhesive layer, abuts against an opposite surface region of the membrane. By this direct contact of the contact surface on the membrane, a reliable electrical conductive connection between the vibration generator and the membrane is produced. The contact surface advantageously forms an electrical contact region of the vibration transmitter, wherein the membrane is at least partially made of electrically conductive material and forms an electrical connection to the connection of the vibration generator.
Die formschlüssige Verbindung ist derart ausgebildet, dass der Schwingungsgeber passgenau in eine korrespondierende Vertiefung der Membran eingreift. Der Schwingungsgeber kann besonders einfach und zuverlässig in einen zugehörigen Bereich der Membran eingepresst sein.The positive connection is designed such that the vibration sensor engages accurately in a corresponding recess of the membrane. The vibration generator can be particularly easily and reliably pressed into an associated region of the membrane.
Die Membran kann als topfförmiges Tiefziehteil ausgebildet sein, wobei der Schwingungsgeber am Boden der topfförmigen Membran angeordnet ist. Dabei kann die Membran vorteilhaft bereits beim Tiefziehvorgang in die Membran eingepresst sein.The membrane may be formed as a cup-shaped deep-drawn part, wherein the vibration generator is arranged at the bottom of the cup-shaped membrane. In this case, the membrane may advantageously already be pressed into the membrane during the deep-drawing process.
Alternativ könnte der Schwingungsgeber aber auch in eine bereits vorhandene Vertiefung der Membran eingepresst werden. Des Weiteren wäre es auch denkbar, zumindest einen Abschnitt des Schwingungsgebers in die Membran einzugießen.Alternatively, the vibrator could also be pressed into an existing depression of the membrane. Furthermore, it would also be conceivable to pour at least a portion of the vibration generator into the membrane.
Als Schwingungsgeber kann eine übliche Piezokeramik vorgesehen sein.As a vibration generator, a conventional piezoceramic may be provided.
Die Erfindung betrifft ferner ein Verfahren zur Herstellung eines Ultraschallwandlers, bei welchem ein elektromechanischer Schwingungsgeber mit einer Membran formschlüssig mechanisch verbunden wird. Die formschlüssige Verbindung wird dabei vorteilhaft durch Einpressen des Schwingungsgebers in einen zugehörigen Bereich der Membran hergestellt.The invention further relates to a method for producing an ultrasonic transducer, in which an electromechanical vibration generator with a membrane is positively connected mechanically. The positive connection is advantageously produced by pressing the vibration generator in an associated region of the membrane.
Die Membran kann besonders kostengünstig durch einen Tiefziehvorgang hergestellt werden, wobei der Schwingungsgeber beim Tiefziehvorgang in den zugehörigen Bereich der Membran eingepresst werden kann. Hierzu kann ein Tiefziehwerkzeug vorgesehen sein, das eine Aufnahme für den Schwingungsgeber aufweist, um diesen beim Tiefziehvorgang in den zugehörigen Bereich der Membran einzupressen.The membrane can be produced in a particularly cost-effective manner by means of a deep-drawing process, it being possible for the vibration transmitter to be pressed into the associated region of the membrane during the deep-drawing process. For this purpose, a thermoforming tool may be provided which has a receptacle for the vibration generator in order to press it into the associated region of the membrane during the deep-drawing process.
Nachfolgend werden Ausführungsbeispiele der Erfindung anhand einer zeichnerischen Darstellung näher erläutert.Embodiments of the invention will be explained in more detail with reference to a drawing.
In der Darstellung zeigen:In the illustration show:
Die
Die Piezokeramik
Zum elektrischen Anschluss der Piezokeramik
Die Piezokeramik
Die beschriebene formschlüssige Verbindung zwischen Pieozokeramik
Alternativ wäre es auch möglich, zunächst die Membran
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009040028.1A DE102009040028B4 (en) | 2009-09-03 | 2009-09-03 | Ultrasonic transducer and method for producing an ultrasonic transducer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009040028.1A DE102009040028B4 (en) | 2009-09-03 | 2009-09-03 | Ultrasonic transducer and method for producing an ultrasonic transducer |
Publications (2)
Publication Number | Publication Date |
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DE102009040028A1 DE102009040028A1 (en) | 2011-04-28 |
DE102009040028B4 true DE102009040028B4 (en) | 2016-06-23 |
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DE102009040028.1A Active DE102009040028B4 (en) | 2009-09-03 | 2009-09-03 | Ultrasonic transducer and method for producing an ultrasonic transducer |
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DE (1) | DE102009040028B4 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102768355B (en) * | 2011-05-05 | 2014-06-25 | 同致电子企业股份有限公司 | Ultrasonic sensor |
DE102015107899A1 (en) | 2015-05-20 | 2016-11-24 | Valeo Schalter Und Sensoren Gmbh | Ultrasonic sensor for a motor vehicle, motor vehicle and method for producing an ultrasonic sensor |
DE102017209823A1 (en) * | 2017-06-09 | 2018-12-13 | Robert Bosch Gmbh | ultrasonic sensor |
DE102017122428B4 (en) | 2017-09-27 | 2019-05-09 | Valeo Schalter Und Sensoren Gmbh | Ultrasonic sensor for a motor vehicle |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69330442T2 (en) * | 1992-03-25 | 2002-05-02 | Molex Inc | Piezoelectric electroacoustic transducer |
DE202007007135U1 (en) * | 2007-05-18 | 2007-08-16 | Seco Sensor Consult Gmbh | Ultrasonic transducer for sending and receiving ultrasonic signal in e.g. air, has piezoelectric transducer unit e.g. piezoceramic, radially coupled to pot base in form-fit and force-fit manner, and housing made of aluminum oxide |
DE102007010500A1 (en) * | 2007-03-05 | 2008-09-11 | Robert Bosch Gmbh | Ultrasonic transducer with directly embedded piezo |
DE102007043479A1 (en) * | 2007-09-12 | 2009-03-19 | Valeo Schalter Und Sensoren Gmbh | Process for the surface treatment of aluminum and a layer structure of a component made of aluminum with an electrical contact |
-
2009
- 2009-09-03 DE DE102009040028.1A patent/DE102009040028B4/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69330442T2 (en) * | 1992-03-25 | 2002-05-02 | Molex Inc | Piezoelectric electroacoustic transducer |
DE102007010500A1 (en) * | 2007-03-05 | 2008-09-11 | Robert Bosch Gmbh | Ultrasonic transducer with directly embedded piezo |
DE202007007135U1 (en) * | 2007-05-18 | 2007-08-16 | Seco Sensor Consult Gmbh | Ultrasonic transducer for sending and receiving ultrasonic signal in e.g. air, has piezoelectric transducer unit e.g. piezoceramic, radially coupled to pot base in form-fit and force-fit manner, and housing made of aluminum oxide |
DE102007043479A1 (en) * | 2007-09-12 | 2009-03-19 | Valeo Schalter Und Sensoren Gmbh | Process for the surface treatment of aluminum and a layer structure of a component made of aluminum with an electrical contact |
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DE102009040028A1 (en) | 2011-04-28 |
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