EP0678853A2 - Transducteur à ultrason ayant une charactéristique de radiation asymmétrique - Google Patents

Transducteur à ultrason ayant une charactéristique de radiation asymmétrique Download PDF

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Publication number
EP0678853A2
EP0678853A2 EP95105504A EP95105504A EP0678853A2 EP 0678853 A2 EP0678853 A2 EP 0678853A2 EP 95105504 A EP95105504 A EP 95105504A EP 95105504 A EP95105504 A EP 95105504A EP 0678853 A2 EP0678853 A2 EP 0678853A2
Authority
EP
European Patent Office
Prior art keywords
membrane
pot
shaped
bending transducer
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.)
Granted
Application number
EP95105504A
Other languages
German (de)
English (en)
Other versions
EP0678853B1 (fr
EP0678853A3 (fr
Inventor
Reinhard Dr. Stumpe
Joachim Mathes
Helmut Dörr
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
ITT Automotive Europe GmbH
Alfred Teves 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 ITT Automotive Europe GmbH, Alfred Teves GmbH filed Critical ITT Automotive Europe GmbH
Publication of EP0678853A2 publication Critical patent/EP0678853A2/fr
Publication of EP0678853A3 publication Critical patent/EP0678853A3/fr
Application granted granted Critical
Publication of EP0678853B1 publication Critical patent/EP0678853B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G10K9/12—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 radiation or reception characteristic of an ultrasound transducer is not linearly symmetrical, but asymmetrical.
  • the radiated field has a different extent in one long section plane than in the other long section plane perpendicular to it.
  • Such field deformation serves, among other things. to better adapt the field to the room to be irradiated.
  • This can apply to monitoring systems, but also to distance warning devices in motor vehicles.
  • Such an essentially fan-shaped field of a distance warning device reacts less strongly to bumps on the ground that do not obstruct the path of the vehicle, but also perceives obstacles to the side of the plane of symmetry of the vehicle.
  • Another measure is to take advantage of the diffraction phenomena of the waves when the sound transducer is emitted or when it is received.
  • an elliptical membrane is described, which is aligned with its long axis perpendicular to the floor surface. The radiation angle is much larger in the horizontal than in the vertical.
  • a similar effect is obtained according to US Pat. No. 4,437,032 by deliberately inserting damping material into the diaphragm cup of a bending transducer. Also by deforming the radiation surface of the membrane itself (see EP-OS 308 899), a fan-shaped radiation field parallel to the driving plane of the vehicle and a corresponding reception field were achieved.
  • the invention is therefore based on a bending transducer of the type resulting from the preamble of claim 1.
  • the object of the invention is to provide a novel form of such a transducer which can be manufactured relatively easily and which leads to an age-stable, sufficiently precisely producible asymmetrical shape of the radiation or reception field of an ultrasound transducer.
  • the invention therefore consists in taking out a preferably circular segment-shaped recess from the radiation surface of the membrane or in molding this recess into the membrane.
  • the membrane can be coupled to a weighting ring (see DE-OS 33 01 848).
  • the features according to the invention are particularly suitable in a development of the invention, for a bending transducer of the configuration resulting from the features according to claim 2.
  • at least one segment is removed from the bottom of the pot carrying the membrane of the vibrator, or a corresponding recess is formed. It is particularly recommended in accordance with claim 1 if a circumferential groove is formed below the bottom of the transducer cup forming the membrane, which groove can be inserted, for example, to a housing accommodating the sensor.
  • the bending transducer has two circular segment-shaped recesses in symmetrically opposite one another the membrane. These can already be taken into account when casting the pot, for example, or can be molded into it by machining.
  • a particularly simple manufacture of the diaphragm pot results in a further development of the invention from the features of claim 4. Thereafter, in particular with machining shaping, it can be manufactured with relatively wide tolerances, such that only the recess extends up to its depth along the central axis of the pot the groove must be enough.
  • the end face of the converter pot that delimits the recess is partially formed by the inner side wall of the groove.
  • FIG. 3 shows the section through a converter pot 1, which is provided for receiving sealing rings with circumferential grooves 2, 3 and 4.
  • the cylinder 5 of the transducer 1, which acts as an annular weight, is closed at its bottom by a membrane 6.
  • FIG. 1 shows the view of the converter according to FIG. 3 seen from the direction R in FIG. 3.
  • the transducer according to the invention does not differ from the known pot transducers described in the references mentioned above.
  • two recesses 7, 8 are cut out of the side walls of the cylinder 5 in the region of the membrane 6 and have a circular segment-shaped contour.
  • the contour of the cutouts 7 and 8 can be clearly seen in FIG. 2.
  • the circular segment-shaped cutouts 7 and 8 have two boundary surfaces 9 and 10 which run parallel to one another and which, in the installed state of the converter, are aligned as a distance warning device in a vehicle parallel to the road surface.
  • the end faces 11, 12 are in the form of a segment of a circle.
  • FIG. 2 two edges 13, 14 are also shown in broken lines, which represent the bottom 15 (see FIG. 3) of the groove 2, up to which the recesses 7, 8 extend. Furthermore, the viewer looking at the transducer pot according to FIG. 2 can still recognize the groove wall 16, which is visible to the viewer through the shaping of the recesses. The edge is only shown in broken lines in FIG. 2, since it is not imperative that the recesses 7, 8 are inserted so deep into the cylinder 5. It is also noteworthy that only a thin wall 20, 21 remains by inserting the recesses 7, 8 in the sectional plane according to FIG. 4 towards the interior of the converter 1.
  • the resonance oscillation of the transducer should be placed so that a half wave of the oscillation over the membrane stands, since then the desired radiation form described above occurs with certainty.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
EP95105504A 1994-04-21 1995-04-12 Transducteur à ultrasons ayant une caractéristique de radiation asymmétrique Expired - Lifetime EP0678853B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4413894A DE4413894C2 (de) 1994-04-21 1994-04-21 Biegewandler in Topfform
DE4413894 1994-04-21

Publications (3)

Publication Number Publication Date
EP0678853A2 true EP0678853A2 (fr) 1995-10-25
EP0678853A3 EP0678853A3 (fr) 1997-05-21
EP0678853B1 EP0678853B1 (fr) 2001-07-18

Family

ID=6516054

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95105504A Expired - Lifetime EP0678853B1 (fr) 1994-04-21 1995-04-12 Transducteur à ultrasons ayant une caractéristique de radiation asymmétrique

Country Status (3)

Country Link
EP (1) EP0678853B1 (fr)
DE (2) DE4413894C2 (fr)
ES (1) ES2158008T3 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997026646A1 (fr) * 1996-01-18 1997-07-24 Itt Automotive Europe Gmbh Transducteur ultrasonique pourvu d'un corps d'amortissement
WO1999001234A2 (fr) * 1997-06-30 1999-01-14 Robert Bosch Gmbh Transducteur ultrasonore
EP1096469A2 (fr) * 1999-10-28 2001-05-02 Murata Manufacturing Co., Ltd. Dispositif à vibration ultrasonore
US6322532B1 (en) * 1998-06-24 2001-11-27 3M Innovative Properties Company Sonophoresis method and apparatus
EP1443342A1 (fr) * 2003-02-01 2004-08-04 Valeo Schalter und Sensoren GmbH Boitier de transducteur en forme de pot supportant une membrane pour un capteur ultrasonique
EP1906383A1 (fr) * 2006-09-29 2008-04-02 Tung Thih Electronic Co., Ltd. Appareil de transducteur à ultrasons
WO2010012533A1 (fr) * 2008-07-31 2010-02-04 Robert Bosch Gmbh Capteur à ultrasons
WO2016046412A1 (fr) * 2014-09-26 2016-03-31 Sennheiser Electronic Gmbh & Co. Kg Transducteur acoustique électrodynamique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19614885C1 (de) * 1996-04-16 1997-09-04 Bosch Gmbh Robert Sensor zum Senden und/oder Empfangen akustischer Signale
DE102015106240A1 (de) 2015-04-23 2016-10-27 Valeo Schalter Und Sensoren Gmbh Ultraschallsensor für ein Kraftfahrzeug mit einer Durchgangsöffnungen aufweisenden Membran, Verkleidungsanordnung sowie Kraftfahrzeug

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0048958A1 (fr) 1980-09-25 1982-04-07 Egon Gelhard Circuit pour déterminer et afficher le dépassement d'écarts prédéterminés minimaux entre un véhicule et un obstacle
DE3221935A1 (de) 1982-06-11 1984-02-16 M W Stoelzel Kg Industrievertr Elektronisches kfz-abstandmessgeraet
US4437032A (en) 1981-09-23 1984-03-13 Egon Gelhard Sensor for distance measurement by ultrasound
DE3301848A1 (de) 1983-01-20 1984-07-26 Siemens AG, 1000 Berlin und 8000 München Ultraschallwandler
DE3441684A1 (de) 1984-11-15 1986-05-15 SWF Auto-Electric GmbH, 7120 Bietigheim-Bissingen Elektroakustischer wandler
EP0308899A2 (fr) 1987-09-25 1989-03-29 Siemens Aktiengesellschaft Transducteur à ultrasons avec une caractéristique d'émission et réception astigmatique
DE3812182A1 (de) 1988-04-13 1989-10-26 Swf Auto Electric Gmbh Wandler, insbesondere ultraschallwandler fuer ein in ein kraftfahrzeug eingebautes entfernungsmessgeraet
DE3826799A1 (de) 1988-08-06 1990-02-08 Swf Auto Electric Gmbh Ultraschallwandler
DE3939387A1 (de) 1989-11-29 1991-06-06 Swf Auto Electric Gmbh Abstandswarnanlage, insbesondere fuer kraftfahrzeuge

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU886325A1 (ru) * 1980-01-04 1981-11-30 Научно-Исследовательский Институт Интроскопии Пьезопреобразователь
DE8712391U1 (de) * 1987-09-12 1987-12-10 Nauroth, Heinz, Dipl.-Finanzwirt, 5300 Bonn Ultraschallsende- und Empfangselement einer nach dem Echoprinzip arbeitenden Entfernungsmeßeinrichtung, insbesondere für die Rückfahrüberwachung bei Kraftfahrzeugen
DE3941634A1 (de) * 1989-12-15 1991-06-20 Siemens Ag Schallisolierte halterung eines ultraschallwandlers
DE3941933C2 (de) * 1989-12-19 1997-01-30 Siemens Ag Ultraschallwandler für Luftströmungsmessung, insbesondere zur Luftmengenmessung bei Verbrennungsmotoren

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0048958A1 (fr) 1980-09-25 1982-04-07 Egon Gelhard Circuit pour déterminer et afficher le dépassement d'écarts prédéterminés minimaux entre un véhicule et un obstacle
US4437032A (en) 1981-09-23 1984-03-13 Egon Gelhard Sensor for distance measurement by ultrasound
DE3221935A1 (de) 1982-06-11 1984-02-16 M W Stoelzel Kg Industrievertr Elektronisches kfz-abstandmessgeraet
DE3301848A1 (de) 1983-01-20 1984-07-26 Siemens AG, 1000 Berlin und 8000 München Ultraschallwandler
DE3441684A1 (de) 1984-11-15 1986-05-15 SWF Auto-Electric GmbH, 7120 Bietigheim-Bissingen Elektroakustischer wandler
EP0308899A2 (fr) 1987-09-25 1989-03-29 Siemens Aktiengesellschaft Transducteur à ultrasons avec une caractéristique d'émission et réception astigmatique
DE3812182A1 (de) 1988-04-13 1989-10-26 Swf Auto Electric Gmbh Wandler, insbesondere ultraschallwandler fuer ein in ein kraftfahrzeug eingebautes entfernungsmessgeraet
DE3826799A1 (de) 1988-08-06 1990-02-08 Swf Auto Electric Gmbh Ultraschallwandler
DE3939387A1 (de) 1989-11-29 1991-06-06 Swf Auto Electric Gmbh Abstandswarnanlage, insbesondere fuer kraftfahrzeuge

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997026646A1 (fr) * 1996-01-18 1997-07-24 Itt Automotive Europe Gmbh Transducteur ultrasonique pourvu d'un corps d'amortissement
US6465935B1 (en) 1997-06-30 2002-10-15 Robert Bosch Gmbh Ultrasonic transducer
WO1999001234A2 (fr) * 1997-06-30 1999-01-14 Robert Bosch Gmbh Transducteur ultrasonore
WO1999001234A3 (fr) * 1997-06-30 1999-04-22 Bosch Gmbh Robert Transducteur ultrasonore
US6322532B1 (en) * 1998-06-24 2001-11-27 3M Innovative Properties Company Sonophoresis method and apparatus
US7009326B1 (en) 1999-10-28 2006-03-07 Murata Manufacturing Co., Ltd. Ultrasonic vibration apparatus use as a sensor having a piezoelectric element mounted in a cylindrical casing and grooves filled with flexible filler
EP1096469A3 (fr) * 1999-10-28 2004-09-29 Murata Manufacturing Co., Ltd. Dispositif à vibration ultrasonore
EP1096469A2 (fr) * 1999-10-28 2001-05-02 Murata Manufacturing Co., Ltd. Dispositif à vibration ultrasonore
EP1443342A1 (fr) * 2003-02-01 2004-08-04 Valeo Schalter und Sensoren GmbH Boitier de transducteur en forme de pot supportant une membrane pour un capteur ultrasonique
EP1906383A1 (fr) * 2006-09-29 2008-04-02 Tung Thih Electronic Co., Ltd. Appareil de transducteur à ultrasons
WO2010012533A1 (fr) * 2008-07-31 2010-02-04 Robert Bosch Gmbh Capteur à ultrasons
CN102113047A (zh) * 2008-07-31 2011-06-29 罗伯特·博世有限公司 超声波传感器
JP2011529652A (ja) * 2008-07-31 2011-12-08 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 超音波センサ
CN102113047B (zh) * 2008-07-31 2013-06-19 罗伯特·博世有限公司 超声波传感器
US8671762B2 (en) 2008-07-31 2014-03-18 Robert Bosch Gmbh Ultrasonic sensor
WO2016046412A1 (fr) * 2014-09-26 2016-03-31 Sennheiser Electronic Gmbh & Co. Kg Transducteur acoustique électrodynamique
US10136224B2 (en) 2014-09-26 2018-11-20 Sennheiser Electronic Gmbh & Co. Kg Electrodynamic sound transducer

Also Published As

Publication number Publication date
DE4413894A1 (de) 1995-10-26
DE4413894C2 (de) 2002-12-12
ES2158008T3 (es) 2001-09-01
EP0678853B1 (fr) 2001-07-18
DE59509415D1 (de) 2001-08-23
EP0678853A3 (fr) 1997-05-21

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