EP0940800B1 - Aufbau und Herstellungsverfahren einer Ultraschallwandlereinrichtung mit einem elastisch eingebetteten Ultraschallwandler - Google Patents
Aufbau und Herstellungsverfahren einer Ultraschallwandlereinrichtung mit einem elastisch eingebetteten Ultraschallwandler Download PDFInfo
- Publication number
- EP0940800B1 EP0940800B1 EP99103332A EP99103332A EP0940800B1 EP 0940800 B1 EP0940800 B1 EP 0940800B1 EP 99103332 A EP99103332 A EP 99103332A EP 99103332 A EP99103332 A EP 99103332A EP 0940800 B1 EP0940800 B1 EP 0940800B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ultrasonic transducer
- melt adhesive
- ultrasound transducer
- hot melt
- ultrasonic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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Classifications
-
- 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
- G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
- G10K9/22—Mountings; Casings
Definitions
- the invention relates to an ultrasonic transducer device with an elastically embedded ultrasonic transducer, which is a plate-shaped piezoceramic transducer with an attached Matching layer includes and with the exception of that side of the matching layer facing the sonicating medium a damping mass is enveloped.
- the invention relates to a method for Manufacture of the above ultrasonic transducer device.
- a generic ultrasonic transducer device is in the EP 0 116 823 B1.
- the entire ultrasonic transducer without the side facing the medium to be sonicated the adaptation layer with a foam covering that There is polyurethane foam.
- the foam wrapper it will Problem solved, the swing-out damping - this is the Damping the mechanical vibrations of the transducer immediately understood after sending - to improve without doing so deteriorate the further transmission behavior significantly.
- an ultrasonic transducer device which consists of a ceramic transducer, one Matching layer, one of a 2-component Silicone elastomer-formed damping layer, and one, the ceramic transducer, the matching layer and housing enclosing the damping layer is formed.
- the invention is therefore based on the object of an ultrasound transducer device state the used Damping compound solidified and without chemical reaction a comparatively short cooling time is achieved. Moreover there is the task of a process for producing a such ultrasonic transducer device with a housing specify.
- the object is achieved in that the damping mass mechanically foamed hot melt adhesive.
- the foam structure of the hot melt adhesive is generated physically or mechanically, without a chemical reaction expires.
- the manufacturing process of the ultrasonic transducer device with the hot melt adhesive is much better controllable than with a polyurethane foam generation.
- the very short cycle time is of economic importance is determined by the cooling time of the hot melt adhesive. This enables demolding times of a few minutes.
- the procedural solution to the above problem is in that to connect the ultrasonic transducer to a rigid Enclose the hot melt adhesive in an ultrasonic transducer containing closed form is injected, which in Parts from the housing itself.
- thermoplastic meltable hot melt adhesive mechanically foaming (The FoamMelt TM process" from the Special print from adhesion 6-7 / 82). That in the mentioned publication described method is based on the melted Hot melt adhesive mass in a processing machine an inert gas, e.g. Nitrogen, homogeneous interfere. After the hot melt adhesive has been discharged expand the glass bubbles under pressure and foam the hot melt adhesive. Come as a starting material all common thermoplastic-based hot melt adhesives in question, but prefers systems with low Shore A hardness.
- the hot melt adhesive advantageously does not adhere to cold ones Surfaces with high heat dissipation. So is in cold Steel molds any shape design without annoying Release agent possible.
- thermal insulation Materials an intimate connection, such as on the matching layer of an ultrasonic transducer, a Plastic housing or a jacketed cable.
- the shape The hot melt adhesive can also be in a form made of antiadhesive Material, such as silicone, are made. at The proposed procedure does not matter how the Fixing the converter during the injection process in the Form is released. The process enables a mechanical good connection of the ultrasonic transducer to a housing an embedding mass, which the required uniform Has foam structure, and is therefore very economical.
- an ultrasonic transducer device with a Ultrasound transducer shown that a plate-shaped Piezoceramic transducer 1 with an adjoining matching layer 2 includes.
- the ultrasonic transducer 1, 2 is, with the exception of that side of the matching layer 2 facing the medium to be sonicated, which faces down here from a mechanically foamed one Hot melt adhesive 3 encased as a damping compound.
- the ultrasonic transducer 1,2 lies with its matching layer 2 with an intermediate layer a film 4 on a metallic base plate 5, only for the manufacture of the ultrasonic transducer device is needed.
- the hot melt adhesive 3 is on the side surrounded by a plastic housing 6 belonging to the mold which also serves as the protective film 4.
- the plastic housing 6 is at the top by a metallic Cover 7 completed with a filling opening 8.
- the base plate 5, the plastic housing 6 and the lid 7 used as molded parts.
- the Hot melt adhesive 3 is melted through in liquid form introduced the filling opening 8. After cooling and solidifying of the hot melt adhesive 3, the moldings mentioned are removed, where necessary, the plastic housing used as a molded part 6 as mechanical protection of the ultrasonic transducer device can remain.
- the film 4 serving as a protective layer can be inserted or in glued to the adaptation layer 2 in an upstream operation become.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Transducers For Ultrasonic Waves (AREA)
Description
Claims (2)
- Ultraschallwandlereinrichtung mit einem Ultraschallwandler, der einen plattenförmigen Piezokeramikschwinger (1) mit anliegender Anpaßschicht (2) umfaßt und der mit Ausnahme der dem zu beschallenden Medium zugewandten Seite der Anpaßschicht (2) von einer Dämpfungsmasse (3) umhüllt ist, dadurch gekennzeichnet, daß die Dämpfungsmasse ein mechanisch geschäumter Schmelzkleber (3) ist.
- Verfahren zum Herstellen einer Ultraschallwandlereinrichtung mit einem Ultraschallwandler, der einen plattenförmigen Piezokeramikschwinger (1) mit anliegender Anpaßschicht (2) umfaßt und der mit Ausnahme der dem zu beschallenden Medium zugewandten Seite der Anpaßschicht (2) von einer Dämpfungsmasse (3) umhüllt ist, dadurch gekennzeichnet, daß die Dämpfungsmasse ein mechanisch geschäumter Schmelzkleber (3) ist und daß der Schmelzkleber (3) zur Anbindung des Ultraschallwandlers (1,2) an ein starres Gehäuse (6) in eine den Ultraschallwandler (1,2) enthaltende, geschlossene Form (5,6,7) eingespritzt wird, die teilweise aus dem Gehäuse (6) besteht.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19809207 | 1998-03-04 | ||
DE19809207A DE19809207C1 (de) | 1998-03-04 | 1998-03-04 | Aufbau und Herstellungsverfahren einer Ultraschallwandlereinrichtung mit einem elastisch eingebetteten Ultraschallwandler |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0940800A2 EP0940800A2 (de) | 1999-09-08 |
EP0940800A3 EP0940800A3 (de) | 2001-11-07 |
EP0940800B1 true EP0940800B1 (de) | 2004-04-14 |
Family
ID=7859665
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99103332A Expired - Lifetime EP0940800B1 (de) | 1998-03-04 | 1999-02-19 | Aufbau und Herstellungsverfahren einer Ultraschallwandlereinrichtung mit einem elastisch eingebetteten Ultraschallwandler |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0940800B1 (de) |
DE (2) | DE19809207C1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1986465A1 (de) * | 2006-02-14 | 2008-10-29 | Murata Manufacturing Co. Ltd. | Ultraschallsensor |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19927796C1 (de) * | 1999-06-18 | 2001-04-19 | Fraunhofer Ges Forschung | Dämpfungsmaterial für Ultraschallwellen |
JP3538708B2 (ja) * | 2000-06-12 | 2004-06-14 | 株式会社村田製作所 | 圧電共振子及び圧電部品 |
DE10125272A1 (de) * | 2001-05-23 | 2002-11-28 | Valeo Schalter & Sensoren Gmbh | Verfahren zur Herstellung eines Ultraschallsensors sowie Ultraschallsensor |
DE10133395A1 (de) * | 2001-07-13 | 2003-01-23 | Flowtec Ag | Messkopf für ein Ultraschall-Durchflussmessgerät |
DE102008055126A1 (de) * | 2008-12-23 | 2010-07-01 | Robert Bosch Gmbh | Ultraschallwandler zum Einsatz in einem fluiden Medium |
DE102014210910A1 (de) * | 2014-06-06 | 2015-12-17 | Faist Chemtec Gmbh | Vorrichtung und Verfahren zur Entdröhnung eines Bauteils |
DE102017107331A1 (de) | 2017-04-05 | 2018-10-11 | Turck Holding Gmbh | Ultraschallsensor |
DE102019124595A1 (de) * | 2019-09-12 | 2021-03-18 | USound GmbH | Verfahren zum Herstellen einer Wandlereinheit |
CN113042349B (zh) * | 2021-03-29 | 2021-11-12 | 深圳市宏电技术股份有限公司 | 一种超声波换能器的制造方法 |
DE102021123352B4 (de) | 2021-09-09 | 2023-08-10 | HASYTEC D&P GmbH | Verfahren zur Befestigung eines Ultraschallwandlers an einer Oberfläche mittels eines Klebstoffs und Klebehilfe zur Durchführung des Verfahrens |
DE102022200918B3 (de) | 2022-01-27 | 2023-04-27 | Vitesco Technologies Germany Gmbh | Verfahren zum Herstellen eines Ultraschallsensors und Ultraschallsensor |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3427481A (en) * | 1965-06-14 | 1969-02-11 | Magnaflux Corp | Ultrasonic transducer with a fluorocarbon damper |
DE3301848C2 (de) * | 1983-01-20 | 1984-11-08 | Siemens AG, 1000 Berlin und 8000 München | Ultraschallwandler |
DE3824140A1 (de) * | 1988-07-15 | 1990-01-25 | Siemens Ag | Befestigen und elektrisches kontaktieren von piezokeramiken |
DE4230773C2 (de) * | 1992-09-15 | 2000-05-04 | Endress Hauser Gmbh Co | Ultraschallwandler |
-
1998
- 1998-03-04 DE DE19809207A patent/DE19809207C1/de not_active Expired - Fee Related
-
1999
- 1999-02-19 EP EP99103332A patent/EP0940800B1/de not_active Expired - Lifetime
- 1999-02-19 DE DE59909143T patent/DE59909143D1/de not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1986465A1 (de) * | 2006-02-14 | 2008-10-29 | Murata Manufacturing Co. Ltd. | Ultraschallsensor |
EP1986465A4 (de) * | 2006-02-14 | 2010-07-21 | Murata Manufacturing Co | Ultraschallsensor |
US7795785B2 (en) | 2006-02-14 | 2010-09-14 | Murata Manufacturing Co., Ltd. | Ultrasonic sensor |
Also Published As
Publication number | Publication date |
---|---|
EP0940800A3 (de) | 2001-11-07 |
DE19809207C1 (de) | 1999-08-26 |
EP0940800A2 (de) | 1999-09-08 |
DE59909143D1 (de) | 2004-05-19 |
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