EP1260965A2 - Procédé de fabrication d'un capteur à ultrasons ainsi qu'un capteur à ultrasons - Google Patents

Procédé de fabrication d'un capteur à ultrasons ainsi qu'un capteur à ultrasons Download PDF

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Publication number
EP1260965A2
EP1260965A2 EP02003246A EP02003246A EP1260965A2 EP 1260965 A2 EP1260965 A2 EP 1260965A2 EP 02003246 A EP02003246 A EP 02003246A EP 02003246 A EP02003246 A EP 02003246A EP 1260965 A2 EP1260965 A2 EP 1260965A2
Authority
EP
European Patent Office
Prior art keywords
membrane
housing
ultrasonic sensor
decoupling medium
decoupling
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Withdrawn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
EP02003246A
Other languages
German (de)
English (en)
Other versions
EP1260965A3 (fr
Inventor
Heinrich Dr. Gotzig
Thorsten Cywinski
Ingrid Theml
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.)
Valeo Schalter und Sensoren GmbH
Original Assignee
Valeo Schalter und Sensoren 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 Valeo Schalter und Sensoren GmbH filed Critical Valeo Schalter und Sensoren GmbH
Publication of EP1260965A2 publication Critical patent/EP1260965A2/fr
Publication of EP1260965A3 publication Critical patent/EP1260965A3/fr
Withdrawn legal-status Critical Current

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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
    • 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 a method for producing a Ultrasonic sensor, with a housing, a membrane and one arranged between the housing and the membrane Decoupling medium.
  • a method for producing a Ultrasonic sensor with a housing, a membrane and one arranged between the housing and the membrane Decoupling medium.
  • Ultrasonic sensors for example with short-range detection systems from Motor vehicles use.
  • Ultrasonic sensors are the individually manufactured Components joined together by plugging them together. Due to the component tolerances, the Position the membrane against the housing undesirable tolerance fluctuations.
  • the present invention is therefore based on the object based on a method for producing a Provide ultrasonic sensor, in which the undesirable tolerances as small as possible and can optimally be completely excluded.
  • the invention proposes the decoupling medium in a deformable state between the membrane and the housing.
  • This has the advantage that in the manufacture of the Ultrasonic sensor the membrane opposite the housing exactly can be prepositioned and that by filling the Space between the membrane and the housing with the decoupling medium the positioning of the membrane is frozen relative to the housing.
  • the decoupling medium advantageously hardens after between the membrane and the housing and thus permanently positions the membrane in the Casing. Adding tolerances that lead to an inexact Position the membrane within the housing, as they are known from the known prior art, are excluded according to the invention.
  • the decoupling medium between the membrane and the Housing is cast. It has been shown that especially the injection molding of the decoupling medium between the membrane and the housing to a particular good, permanent and positionally accurate arrangement of the Membrane can lead inside the housing.
  • the Decoupling medium which is preferably rubbery Features can be easily injection molded are processed.
  • the invention provides that the membrane in one first step with a housing Plastic and in a second step with the between the housing and the membrane Decoupling medium is encapsulated. advantageously, can do these two steps within one Spraying system can be carried out.
  • the housing is preferably made of a hard or solid plastic, which hardens relatively quickly after the spraying process preferably injection molded the housing first.
  • the Membrane preferably made of a metallic Material, in particular aluminum, and the housing then becomes the preferably rubber-like decoupling medium injected.
  • the extrusion coating is carried out in such a way that it mechanical vibrations of the membrane compared to the Housing or the environment of the housing over a predetermined temperature range defines decouples that it has a sufficiently high mechanical stability and that they are bringing all kinds of media inside prevents the membrane.
  • the ultrasonic sensor 1 comprises a plastic housing 3 and a cup-shaped trained membrane 5 made of aluminum, wherein between the Housing 3 and the membrane 5 a rubber-like Decoupling medium 7 is present.
  • a piezo ceramic disc 9 On the bottom of the cup-shaped membrane 5 is a piezo ceramic disc 9 arranged. Via an electrical line 11, which ends at the piezo-ceramic disk 9 and one further electrical line 13, the side of the Inside the membrane 5 is caulked, the piezo ceramic disc 9 with an electrical voltage be charged.
  • a mechanical Damping material 15 in particular a foam filled up.
  • the damping material 15 in the section shown in the figure a section 17 on.
  • a rubber part 19 is provided to position the damping material 15 is in inner.
  • the membrane 5 has several on its outer circumference Indentations 21 through which the membrane 5 inside of the housing 3 via the decoupling medium 7 permanently is positioned.
  • the open to the top Housing 3 is covered by a housing cover 25 which has detent bulges 27 in its edge region.
  • the ultrasonic sensor 1 can be fastened with detent bulges 27 become.
  • the housing part 3 has on its outer circumference also several openings 29 on the acoustic Decoupling the ultrasonic signals are used.
  • the ultrasonic sensor 1 shown in the figure takes place especially with short-range detection systems from Vehicles use.
  • the membrane is placed in a 2-component spraying system created.
  • the plastic housing 3 is injected around the membrane 5.
  • rubber-like decoupling medium 7 between the membrane 5 and injection molded the plastic housing 3. This will advantageously achieved that an exact and permanent positioning of the membrane 5 relative to the Housing 3 or its outer contours is guaranteed. Unwanted assembly time tolerances, as in the known prior art exist not according to the invention.
  • the piezo ceramic disc 9 inserted into the membrane 5 and the membrane 5 equipped with the damping material 15 and the rubber part 19. it the silicone casting compound 23 is then applied. Finally, the housing cover 25 on top open housing 3 of the ultrasonic sensor 1 placed.
  • the membrane 5 positioned relative to the housing 3 and the Position by injecting or pouring the Decoupling medium 7 frozen.
  • the rubber part 19 and the silicone sealing compound 23 can be provided, only a suitable medium, in particular to provide a foamable medium.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Treatment Of Fiber Materials (AREA)
EP02003246A 2001-05-23 2002-02-21 Procédé de fabrication d'un capteur à ultrasons ainsi qu'un capteur à ultrasons Withdrawn EP1260965A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001125272 DE10125272A1 (de) 2001-05-23 2001-05-23 Verfahren zur Herstellung eines Ultraschallsensors sowie Ultraschallsensor
DE10125272 2001-05-23

Publications (2)

Publication Number Publication Date
EP1260965A2 true EP1260965A2 (fr) 2002-11-27
EP1260965A3 EP1260965A3 (fr) 2008-07-30

Family

ID=7685954

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02003246A Withdrawn EP1260965A3 (fr) 2001-05-23 2002-02-21 Procédé de fabrication d'un capteur à ultrasons ainsi qu'un capteur à ultrasons

Country Status (2)

Country Link
EP (1) EP1260965A3 (fr)
DE (1) DE10125272A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007144063A2 (fr) * 2006-06-14 2007-12-21 Valeo Schalter Und Sensoren Gmbh Capteur à ultrasons avec membrane
WO2007144047A1 (fr) * 2006-06-14 2007-12-21 Valeo Schalter Und Sensoren Gmbh Capteur par ultrasons
WO2007144065A2 (fr) * 2006-06-14 2007-12-21 Valeo Schalter Und Sensoren Gmbh Capteur à ultrasons, notamment capteur à ultrasons de véhicule automobile
EP1902789A1 (fr) * 2006-09-22 2008-03-26 Baumer Electric AG Transducteur à ultrasons et capteur à ultrasons
DE102014115333A1 (de) 2014-10-21 2016-04-21 Valeo Schalter Und Sensoren Gmbh Ultraschallsensor für ein Kraftfahrzeug, Anordnung, Kraftfahrzeug sowie Herstellungsverfahren
WO2022084091A1 (fr) * 2020-10-21 2022-04-28 Valeo Schalter Und Sensoren Gmbh Émetteur-récepteur ultrasonique et procédé de fabrication correspondant

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4306561B2 (ja) 2004-08-11 2009-08-05 株式会社デンソー 超音波センサ
DE102005045306A1 (de) * 2005-09-16 2007-03-29 Valeo Schalter Und Sensoren Gmbh Verfahren zur Herstellung eines Ultraschallsensors sowie Ultraschallsensor
DE102006011155A1 (de) 2006-03-10 2007-09-13 Robert Bosch Gmbh Ultraschallsensor
ITMO20110053A1 (it) 2011-03-07 2012-09-08 Meta System Spa Procedimento per la realizzazione di un dispositivo sensore, in particolare di un dispositivo sensore impiegabile in sistemi di assistenza al parcheggio per veicoli
DE102012014932A1 (de) * 2012-07-27 2014-05-15 Valeo Schalter Und Sensoren Gmbh Verfahren zum Herstellen eines Ultraschallsensors für ein Kraftfahrzeug, Ultraschallsensor und Kraftfahrzeug
DE102013213493A1 (de) 2013-07-10 2015-01-15 Robert Bosch Gmbh Schallwandleranordnung
DE102013022061A1 (de) 2013-12-23 2015-06-25 Valeo Schalter Und Sensoren Gmbh Verfahren zum Herstellen eines Ultraschallsensors für ein Kraftfahrzeug
DE102013022063A1 (de) 2013-12-23 2015-06-25 Valeo Schalter Und Sensoren Gmbh Verfahren zum Herstellen eines Ultraschallsensors für ein Kraftfahrzeug
DE102015107123A1 (de) 2015-05-07 2016-11-10 Valeo Schalter Und Sensoren Gmbh Verfahren zum Herstellen eines Ultraschallsensors für ein Kraftfahrzeug, Ultraschallsensor, Fahrerassistenzsystem sowie Kraftfahrzeug
DE102017107331A1 (de) 2017-04-05 2018-10-11 Turck Holding Gmbh Ultraschallsensor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19809207C1 (de) * 1998-03-04 1999-08-26 Siemens Ag Aufbau und Herstellungsverfahren einer Ultraschallwandlereinrichtung mit einem elastisch eingebetteten Ultraschallwandler
DE19927797C1 (de) * 1999-06-18 2000-12-07 Fraunhofer Ges Forschung Ultraschallwandler und Verfahren zu seiner Herstellung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19601656B4 (de) * 1996-01-18 2009-07-16 Valeo Schalter Und Sensoren Gmbh Bedämpfter Ultraschallwandler
FR2748183B1 (fr) * 1996-04-29 1998-05-22 Inst Francais Du Petrole Hydrophone et procede pour sa fabrication

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19809207C1 (de) * 1998-03-04 1999-08-26 Siemens Ag Aufbau und Herstellungsverfahren einer Ultraschallwandlereinrichtung mit einem elastisch eingebetteten Ultraschallwandler
DE19927797C1 (de) * 1999-06-18 2000-12-07 Fraunhofer Ges Forschung Ultraschallwandler und Verfahren zu seiner Herstellung

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007144063A2 (fr) * 2006-06-14 2007-12-21 Valeo Schalter Und Sensoren Gmbh Capteur à ultrasons avec membrane
WO2007144047A1 (fr) * 2006-06-14 2007-12-21 Valeo Schalter Und Sensoren Gmbh Capteur par ultrasons
WO2007144065A2 (fr) * 2006-06-14 2007-12-21 Valeo Schalter Und Sensoren Gmbh Capteur à ultrasons, notamment capteur à ultrasons de véhicule automobile
WO2007144065A3 (fr) * 2006-06-14 2008-02-07 Valeo Schalter & Sensoren Gmbh Capteur à ultrasons, notamment capteur à ultrasons de véhicule automobile
WO2007144063A3 (fr) * 2006-06-14 2008-04-03 Valeo Schalter & Sensoren Gmbh Capteur à ultrasons avec membrane
US7929377B2 (en) 2006-06-14 2011-04-19 Valeo Schalter Und Sensoren Gmbh Ultrasound sensor, in particular, a motor vehicle ultrasound sensor
US8104351B2 (en) 2006-06-14 2012-01-31 Valeo Schalter Und Sensoren Gmbh Ultrasound sensor with membrane
CN101473369B (zh) * 2006-06-14 2012-06-27 法雷奥开关和传感器有限责任公司 汽车超声波传感器
EP1902789A1 (fr) * 2006-09-22 2008-03-26 Baumer Electric AG Transducteur à ultrasons et capteur à ultrasons
DE102014115333A1 (de) 2014-10-21 2016-04-21 Valeo Schalter Und Sensoren Gmbh Ultraschallsensor für ein Kraftfahrzeug, Anordnung, Kraftfahrzeug sowie Herstellungsverfahren
EP3012654A1 (fr) 2014-10-21 2016-04-27 Valeo Schalter und Sensoren GmbH Capteur a ultrasons pour un vehicule automobile, systeme, vehicule automobile et procede de fabrication
WO2022084091A1 (fr) * 2020-10-21 2022-04-28 Valeo Schalter Und Sensoren Gmbh Émetteur-récepteur ultrasonique et procédé de fabrication correspondant

Also Published As

Publication number Publication date
EP1260965A3 (fr) 2008-07-30
DE10125272A1 (de) 2002-11-28

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