EP1997100B1 - Ultraschallsensor - Google Patents

Ultraschallsensor Download PDF

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Publication number
EP1997100B1
EP1997100B1 EP07712104A EP07712104A EP1997100B1 EP 1997100 B1 EP1997100 B1 EP 1997100B1 EP 07712104 A EP07712104 A EP 07712104A EP 07712104 A EP07712104 A EP 07712104A EP 1997100 B1 EP1997100 B1 EP 1997100B1
Authority
EP
European Patent Office
Prior art keywords
housing
cover
ultrasound sensor
damping element
lid
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.)
Not-in-force
Application number
EP07712104A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1997100A1 (de
Inventor
Martin Reiche
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 EP1997100A1 publication Critical patent/EP1997100A1/de
Application granted granted Critical
Publication of EP1997100B1 publication Critical patent/EP1997100B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • G10K11/002—Devices for damping, suppressing, obstructing or conducting sound in acoustic devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49007—Indicating transducer

Definitions

  • the present invention relates to an ultrasonic sensor for a vehicle and a corresponding method for producing the same.
  • Ultrasonic sensors are used in motor vehicles, for example, as a parking aid, for which purpose in particular a so-called Nahmessele in a Entfemungs Society of less than 30 cm is a crucial functional requirement. They consist generally of a housing and a transducer element arranged therein (sieche zb JP 10 206 528 A ).
  • the housing is usually formed or milled from a metallic material, such as aluminum. It is coated for corrosion protection and Lackierfugn with a primer.
  • An electromechanical transducer element eg, a piezoelectric element
  • the housing is filled with a damping material.
  • a damping material is an injected silicone foam.
  • a contacting of the transducer elements consists for example in that a connecting line is attached to the metallized transducer element top of the piezoelectric element, wherein the underside of the transducer element is fixed with an adhesive on the bottom of the housing.
  • the metallic housing or the metallic membrane forms the second terminal or the second electrode (cathode).
  • the second connecting line is then soldered to the conductive housing (made of aluminum, for example), suitably connected by drilling the housing wall thereto or fastened to a housing journal, which is considered to be disadvantageous in terms of the number of components and the production outlay.
  • the contacting of the transducer element underside is carried out by a so-called Umking mich.
  • the piezoceramic disc is completely coated with silver and at the top a D-shaped separating cut (see Fig. 2 ) of the silver coating. This creates on the top two contactable by strand, bonds or other conductors surfaces.
  • the disadvantage here is the non-homogeneous field / force distribution in the piezoceramic, since the upper surface is only partially covered by the D-section through the one (anode) contact (inhomogeneous plate capacitor).
  • a further disadvantage is that, in the case of an incorrect bonding (depending on the thickness of the bonding and roughness of the bottom) of the underside of the transducer element to the bottom of the housing, the housing is not contacted by the Umutton michitzer to ground (GND or ground) and the sensor undesirable to work as a capacitive sensor, where he is sensitive to electrical interference.
  • UTD Umbit or ground
  • thermocompression welding with low mass contribution is functionally advantageous in the series.
  • the JP 2002238095 A describes an ultrasonic sensor with a lid, wherein the housing is formed on the one hand smooth-walled and on the other hand with gradations that require increased manufacturing costs.
  • the cover may be staggered in the housing to dampen certain vibration modes, the adjustment of this position means increased expense.
  • the lid has a smooth surface, whereby it is made thicker than the pot membrane, but otherwise not specified. Has cut-outs or bulges.
  • the concept is to store the unilaterally free oscillator "pot wall" at the top hard and thus produce a bilaterally suspended bending shaft (Drawing 6 and 7).
  • the lid is glued.
  • the terminals are attached to the transducer element and to the housing in unspecified manner.
  • the DE 296 14 691 U 1 describes an ultrasonic sensor in which a felt insert is held by a cover disk above a transducer element. The contacting of the transducer element takes place via a direct connection and via a contact pin inserted in a weighting ring.
  • the structure is complex and includes the construction of a prestressed Teflon film.
  • the DE 101 25 272 A1 describes an ultrasonic sensor and its manufacturing method. Its transducer element is covered by three different layers, wherein a cover covers three housing parts. A conductive housing part, which forms the membrane, is provided with a caulked connection. This writing refers only to the Generation of decoupling ring between oscillating membrane and housing by encapsulation with silicone.
  • An ultrasonic transducer used in the DE 197 44 229 A1 has a housing with a bead and a housing closing decoupling ring on.
  • the decoupling ring forms in one embodiment simultaneously use as a damping material within the housing. In another embodiment, it has a cylindrical passage opening which is filled with a damping material. A closer specification of the passage opening in terms of their geometry and function is not given.
  • the decoupling ring also serves as a holder for the terminals of the transducer element, wherein connection of the housing is present.
  • the DE 44 34 692 A1 is an example illustrating the attachment of a piezoceramic with conductive adhesive on a metal plate of an ultrasonic sensor.
  • the ultrasonic sensor according to the invention has the advantage that it meets the requirements of the decisive Nahmess sparkle with a small number of components. Another advantage is that the components are designed so that a production of the ultrasonic sensor has no difficult-to-control processes and manual production is made possible in a simple manner.
  • the ultrasonic sensor has a housing which is closed by a lid, which at the same time includes a damping element, allows the implementation of the connecting line and the contacting of the housing in a simple manner. During manufacture, another damping element is inserted into the housing.
  • the cover has a geometry shape which is designed in such a way that disturbing wall waves are introduced, if possible, without reflection into the plastic damping element introduced into it.
  • the housing is closed with a lid whose contour is adapted to the course of the housing inner wall in order to achieve a smooth transition of the wall vibration in the lid.
  • the lid is connected to the housing by means of an adhesive.
  • an adhesive for ease of manufacture, it is advantageously provided that the connection of the cover to the housing by means of a protruding from the edge of the mold section connecting element in cooperation with a corresponding receptacle in the housing is formed non-positively. This can be, for example, a so-called clip connection. Between the lid and the pot wall, a circumferential traction is provided.
  • the housing oscillations are not prevented by a hard suspension at the top of the housing wall, but as possible adapted to the mechanical impedance converted into thermal energy in the second damping element.
  • the lid is provided with a through opening in which the damping element is arranged, wherein the opening has a continuous edge profile of its inner wall.
  • the continuous edge course ensures that the wall vibrations transmitted into the cover are adapted to migrate into this damping element where they are converted into thermal energy, whereby they swing out in a damped way.
  • the cover is provided with feedthroughs for connection lines of the transducer element.
  • the lid has at least one contacting device for a electrically conductive connection between a connection element and the housing. This advantageously achieves that on the one hand a transducer element can be used, which is only metallized on one side, wherein the lower electrode is formed by the conductive housing. On the other hand, there is the advantage that when applying the lid to the housing at the same time a contacting of the housing takes place, thereby eliminating additional processing of the housing and the production is simplified.
  • the contacting device is designed as an insulation displacement construction or as a spring contact.
  • the insulation displacement structure is integrated in the lid.
  • the contacting can be a conductive adhesive, with the advantage that the conductive adhesive simultaneously forms the non-positive connection of the lid with the housing.
  • a further embodiment provides that the outer diameter of the cover for holding a decoupling ring is slightly larger than the outer diameter of the housing. This increases the possibility of using the sensor for other applications. The need for a retaining bead or groove on the metallic housing wall is thus eliminated. There is another advantage in that the mechanical impedance of the wall is not changed.
  • the housing advantageously has no bead or groove. As a result, a change in the mechanical impedance of the housing wall and thus a reflection point for vibrations in the housing wall are avoided.
  • the first damping element is designed as an insertable into the housing open-pore foam insert component. This can be done manually in a simple manner before closing the housing.
  • connection cables are soldered to the corresponding connection points and then the first damping element is inserted into the housing.
  • the ultrasonic sensor remains at its operating frequency 48 kHz low impedance and thus efficient. This is done by selective attenuation of the membrane with the insert 1. It can be controlled with smaller transmission voltages and has higher generator voltages in the microphone range.
  • the former is synonymous with a reduced risk of depolarization of the piezoceramic, less overdriving a transformer in the non-linearity or the possibility of a smaller transformer gear ratio and thereby the use of a smaller sized driver stage.
  • the lid itself can be preproduced as a precursor with its introduced damping material regardless of cycle times of the sensor manufacturing, buffering a single-stranded production line can be avoided.
  • This damping material can be designed specifically for the wall vibrations.
  • the waiver of the bead in the case means advantages in the rough production of the housing by extrusion.
  • the senor Due to the high transmission efficiency and improved noise / noise margins when receiving, the sensor is well suited for realizing larger ranges for advanced functions such as parking space measurement, blind spot monitoring, LSF, etc.
  • the Nahmes emphasis the sensor of the invention improves by the lid insert in a non-foamed housing of about 28 ... 30 cm to about 22 ... 23 cm on the plausibilized binary signal.
  • FIG. 1 an inventive sensor 1 is shown in a sectional view as an embodiment.
  • a housing 2 has a bottom 5 as a membrane. Furthermore, the housing 2 has on its upper side an edge 4 with an opening with a contour 6 (see Fig. 2 ), in which a lid 17 is inserted.
  • the housing 2 is preferably a die-pressed aluminum part.
  • transducer element 8 is fastened by means of a connecting element 7, here an adhesive, on the bottom of the housing 2.
  • the transducer element 8 has only a one-sided first coating 9 made of a suitable metal, for example silver.
  • the coating 9 is connected via a soldering in a first connection point 12 to a first supply line 14.
  • transducer elements 8, in which a second coating 10 is present on its underside, can be used, wherein the connecting element 7 is then formed as a conductive adhesive.
  • a first damping element 16 is inserted for damping the vibration of the membrane.
  • the first lead 14 is laid either around the first damping element 16 around or in a bulge or an incision of the damping element 16.
  • the contacting of the housing 2 for connection of the underside of the transducer element 8 is formed by a contacting device 30, which is located on the underside of the lid 17 on a mold section 23.
  • This contacting device 30 can be embodied, for example, as an insulation displacement construction, spring construction, or simply a conductive adhesive.
  • the conductive adhesive can also form a frictional connection of the lid 17 with the housing 2 at the same time.
  • the contacting device 30 is connected within the lid 17 with a connection element 29, which in this example protrudes beyond the lid 17, to which a second supply line can be connected, for example by soldering.
  • the cover 17 closes the housing 2 by its form portion 23 is positively inserted into the contour 6 of the housing opening.
  • a frictional connection can be made by means of an adhesive and / or a connecting device.
  • a connection device may be, for example, a protruding from the edge of the mold portion 23 element which is locked with the housing 2 suitable, for example a clip connection.
  • the housing 2 may have suitable grooves (not shown).
  • an opening 20 is introduced, which is filled with a second damping element 28, for example a plasto-elastic material. This opening 20 will be described in more detail below.
  • the sensor 1 cover 17 and housing 2 are prefabricated, either together on a line or separately.
  • the prefabrication can be done independently.
  • the sensor 1 is manufactured, the first lead is soldered to the glued into the housing 2 transducer element 8. Then the first damping element 16 is inserted.
  • the first supply line 14 may already be carried out in the lid 17 or glued. Then, the housing is closed with the lid 17, the above-mentioned connection possibilities are used.
  • the connection of the connecting element 29 may have been made before or is now made.
  • the sensor 1 may also be equipped with a re-contacted transducer element 8, which in Fig. 2 in a plan view of an open housing 2 is shown only schematically.
  • the transducer element 8 is of a metallic coating 8, which is provided on the top with a parting line 11 in D-shape. As a result, two connection regions are formed, which are each contacted with a supply line 14, 15 in connection points 12, 13.
  • Fig. 3 shows the view of its bottom 19 with the mold portion 23 which extends in a direction on both sides from the center of the lid 17 as a rectangle with rounded corners. Its shape is the contour 6 of the housing 2 (see Fig. 2 ) and may also have other configurations.
  • the passages 25, 26 for the leads 14, 15 of the transducer element 8 are provided in the region of the mold section 23, since this ensures a wider guide.
  • the supply lines can also be injected into the lid 17, which consists for example of a suitable plastic.
  • the opening 20 penetrates the lid as Fig. 4 in a sectional view along the line BB and Fig. 5 along the line AA Fig. 3 shows.
  • the opening 20 has first and second opening portions 21 and 22, wherein the first opening portion is tapered.
  • the inner walls 27 of the opening portions 21, 22 have a continuous edge profile and thus a continuous taper of the lid thickness for the advantageous introduction of vibration in the second damping element 28, which is introduced into the opening 20.
  • the contacting device 30 is arranged on the outside of the mold section 23, the contacting device 30 is arranged. It may also be attached to the underside 19 of the lid 17.
  • the top 18 of the lid 17 is configured just in this embodiment. But it can also have other suitable forms.
  • the invention is not limited to the embodiments described above, but modifiable in a variety of ways.
  • the contacting device 30 may be a combination of insulation displacement connection, spring contact and conductive adhesive.
  • the second damping element 28 can also be created together with the cover 20 in a two-component injection molding process.
  • lid 17 and the housing 2 are connected by a screwing operation with, for example, a quarter turn, wherein the mold portion 23 may have a suitable shape with a cutting lug.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
EP07712104A 2006-03-10 2007-01-25 Ultraschallsensor Not-in-force EP1997100B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006011155A DE102006011155A1 (de) 2006-03-10 2006-03-10 Ultraschallsensor
PCT/EP2007/050719 WO2007104594A1 (de) 2006-03-10 2007-01-25 Ultraschallsensor

Publications (2)

Publication Number Publication Date
EP1997100A1 EP1997100A1 (de) 2008-12-03
EP1997100B1 true EP1997100B1 (de) 2013-01-09

Family

ID=37982449

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07712104A Not-in-force EP1997100B1 (de) 2006-03-10 2007-01-25 Ultraschallsensor

Country Status (7)

Country Link
US (1) US8080922B2 (zh)
EP (1) EP1997100B1 (zh)
CN (1) CN101401150B (zh)
BR (1) BRPI0708581A2 (zh)
DE (1) DE102006011155A1 (zh)
ES (1) ES2399994T3 (zh)
WO (1) WO2007104594A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017115493A1 (de) 2017-07-11 2019-01-17 Valeo Schalter Und Sensoren Gmbh Elektrische Verbindungseinrichtung für einen Ultraschallsensor eines Kraftfahrzeugs, Verfahren zum Herstellen eines Ultraschallsensors, Ultraschallsensor sowie Kraftfahrzeug

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DE102006040344B4 (de) * 2006-08-29 2022-09-29 Robert Bosch Gmbh Haltevorrichtung für einen Ultraschallwandler
DE102006050037A1 (de) * 2006-10-24 2008-04-30 Robert Bosch Gmbh Ultraschallwandler
DE102008027970B4 (de) 2008-06-12 2013-04-04 Hella Kgaa Hueck & Co. Ultraschallsensor
DE102008040905A1 (de) 2008-07-31 2010-02-04 Robert Bosch Gmbh Ultraschallsensor
JP5386910B2 (ja) * 2008-09-26 2014-01-15 株式会社デンソー 電子回路装置
DE102008044351A1 (de) 2008-12-04 2010-06-10 Robert Bosch Gmbh Ultraschallsensor und Ultraschallsensorsystem
DE102009046972A1 (de) * 2009-11-23 2011-05-26 Robert Bosch Gmbh Ultraschallsensor
DE102010024205A1 (de) 2010-06-17 2011-12-22 Valeo Schalter Und Sensoren Gmbh Ultraschallsensor und Fahrzeug mit einem derartigen Ultraschallsensor
KR20120136653A (ko) * 2011-06-09 2012-12-20 삼성전기주식회사 초음파 센서
JP5371066B2 (ja) * 2011-11-04 2013-12-18 正道 岩佐 超音波センサ及びこれを用いた超音波流量計
JP5708629B2 (ja) * 2012-02-21 2015-04-30 ヤマハ株式会社 マイクロホン装置
US9170140B2 (en) * 2012-05-04 2015-10-27 Cameron International Corporation Ultrasonic flowmeter with internal surface coating and method
DE102012210513A1 (de) 2012-06-21 2013-12-24 Robert Bosch Gmbh Dämpfungselement zur Dämpfung von Schwingungen, Schallwandleranordnung mit einem Dämpfungselement sowie Verfahren zur Herstellung eines Dämpfungselements
DE102012210522A1 (de) * 2012-06-21 2013-12-24 Robert Bosch Gmbh Dämpfungselement zur Dämpfung von Schwingungen, Schallwandleranordnung mit einem Dämpfungselement sowie Verfahren zur Herstellung eines Dämpfungselements
DE102012106691A1 (de) * 2012-07-24 2014-01-30 Valeo Schalter Und Sensoren Gmbh Alternativer Einbau eines verdeckten Ultraschallsensors im Kraftfahrzeug
DE102012014810A1 (de) * 2012-07-26 2014-01-30 Volkswagen Aktiengesellschaft Ultraschallsensorvorrichtung
DE102012107315B4 (de) * 2012-08-09 2022-02-10 Vega Grieshaber Kg Schwingvorrichtung für eine Füllstandsmesseinheit
DE102013211533A1 (de) 2013-06-19 2014-12-24 Robert Bosch Gmbh Ultraschallwandler und Verfahren zum Betrieb eines Ultraschallwandlers
DE102015212599B3 (de) * 2015-07-06 2016-06-23 Robert Bosch Gmbh Ultraschallsensorvorrichtung zur Anordnung an einem Verkleidungsbauteil eines Fahrzeugs
DE102015216200A1 (de) * 2015-08-25 2017-03-02 Robert Bosch Gmbh Akustischer Sensor mit einem Gehäuse und einem an diesem Gehäuse angeordneten Membranelement
CN105181819B (zh) * 2015-10-21 2018-04-24 江苏融庆科技有限公司 一种超声换能器
DE102017123401B4 (de) * 2017-10-09 2019-05-09 Valeo Schalter Und Sensoren Gmbh Ultraschallsensor für ein Fahrzeug
DE102017127587A1 (de) * 2017-11-22 2019-05-23 Valeo Schalter Und Sensoren Gmbh Anordnung für ein Kraftfahrzeug mit einem Ultraschallsensor und mit einem Dämpfungselement, welches Armierungselemente aufweist sowie Vorrichtung
DE102018105502B4 (de) * 2018-03-09 2019-09-26 Valeo Schalter Und Sensoren Gmbh Ultraschallsensor-Baugruppe, Verfahren zum Zusammenbau einer Ultraschallsensor-Baugruppe und Ultraschallsensorvorrichtung mit einer Ultraschallsensor-Baugruppe
CN108808205B (zh) * 2018-07-25 2024-02-23 苏州国华特种线材有限公司 一种高强度高频合金振子
US11866042B2 (en) 2018-08-20 2024-01-09 Indian Motorcycle International, LLC Wheeled vehicle adaptive speed control method and system
DE102018128513B4 (de) 2018-11-14 2022-09-22 Valeo Schalter Und Sensoren Gmbh Ultraschallsensor mit lasergeschweißtem Deckel und Beschriftung
DE102019102243A1 (de) 2019-01-30 2020-07-30 Valeo Schalter Und Sensoren Gmbh Wandlerelement, Ultraschallsensor-Baugruppe und Ultraschallsensor
DE102019115032A1 (de) * 2019-06-04 2020-12-10 Tdk Electronics Ag Ultraschall-Wandler

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JP2002238095A (ja) 2001-02-09 2002-08-23 Nippon Soken Inc 超音波マイクロホン
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017115493A1 (de) 2017-07-11 2019-01-17 Valeo Schalter Und Sensoren Gmbh Elektrische Verbindungseinrichtung für einen Ultraschallsensor eines Kraftfahrzeugs, Verfahren zum Herstellen eines Ultraschallsensors, Ultraschallsensor sowie Kraftfahrzeug
DE102017115493B4 (de) 2017-07-11 2019-02-14 Valeo Schalter Und Sensoren Gmbh Elektrische Verbindungseinrichtung für einen Ultraschallsensor eines Kraftfahrzeugs, Verfahren zum Herstellen eines Ultraschallsensors, Ultraschallsensor sowie Kraftfahrzeug

Also Published As

Publication number Publication date
DE102006011155A1 (de) 2007-09-13
WO2007104594A1 (de) 2007-09-20
CN101401150A (zh) 2009-04-01
CN101401150B (zh) 2011-10-05
EP1997100A1 (de) 2008-12-03
BRPI0708581A2 (pt) 2011-05-31
US20090301205A1 (en) 2009-12-10
ES2399994T3 (es) 2013-04-04
US8080922B2 (en) 2011-12-20

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