EP3010649A1 - Ultraschallwandleranordnung und kraftfahrzeug mit einer ultraschallwandleranordnung - Google Patents
Ultraschallwandleranordnung und kraftfahrzeug mit einer ultraschallwandleranordnungInfo
- Publication number
- EP3010649A1 EP3010649A1 EP14714704.5A EP14714704A EP3010649A1 EP 3010649 A1 EP3010649 A1 EP 3010649A1 EP 14714704 A EP14714704 A EP 14714704A EP 3010649 A1 EP3010649 A1 EP 3010649A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- transducer elements
- membrane
- transducer assembly
- ultrasonic 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
Links
- 238000002604 ultrasonography Methods 0.000 title claims abstract description 27
- 239000012528 membrane Substances 0.000 claims abstract description 49
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 239000011888 foil Substances 0.000 claims description 37
- 230000008878 coupling Effects 0.000 description 14
- 238000010168 coupling process Methods 0.000 description 14
- 238000005859 coupling reaction Methods 0.000 description 14
- 239000000853 adhesive Substances 0.000 description 11
- 230000001070 adhesive effect Effects 0.000 description 11
- 239000000463 material Substances 0.000 description 10
- 239000004020 conductor Substances 0.000 description 6
- 239000004033 plastic Substances 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000007819 coupling partner Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
Definitions
- the invention relates to an ultrasonic transducer arrangement which is set up
- Transducer elements which are arranged at a distance from each other and are adapted to transmit and / or to receive ultrasonic signals.
- the invention also relates to a method for producing such
- Ultrasonic transducer assembly and a motor vehicle in which such
- Ultrasonic transducer assembly is provided.
- transducer arrangements are used for ultrasound-based environment sensing.
- an acoustic transducer which has a so-called array of transducer elements, which are arranged according to a 1 -3 technique and whose upper and lower ends are encapsulated in rigid polymer plates.
- the transducer elements are contacted by flexible conductor carriers, which consist of a polyimide material which is coated on both sides with a copper conductor.
- EP 0 697 257 A2 shows transducer elements having a 2-2 or 1 -3 structure, wherein elements on opposite major surfaces of electrodes are contacted. Passive polymer layers are provided between the piezoelectric elements contacted by the electrodes, resulting in an array structure.
- an ultrasonic transducer assembly configured to transmit and / or receive ultrasound signals comprises at least two transducer elements, a diaphragm and at least one back mass.
- the at least two transducer elements are arranged spaced from each other. The least two
- Transducer elements are indirectly or directly coupled to the membrane on one end face and coupled on an opposite side indirectly or directly to the at least one back mass.
- a concealed mounted array sensor of a novel type of contacting is proposed, which is applied to an outer skin.
- the proposed design is very simple, compact and inexpensive implemented.
- the term of the transducer element is to be understood broadly and includes, for example, electrical-acoustic transducers, which work according to electrostatic, magnetostrictive, piezoelectric effects or combinations of these effects.
- the transducer element may in particular be a piezoelectric element and the ultrasound transducer arrangement may be referred to as a piezoelectric ultrasound transducer array.
- the membrane of the ultrasonic transducer assembly is formed for example by an outer skin of a bumper, side mirror or door area of a motor vehicle, wherein the transducer elements are arranged hidden behind the outer skin.
- the membrane is formed from a thin layer of material, which is made for example of a polymer material.
- the membrane has a thickness between 0.1 mm and 5 mm, more preferably less than 2 mm or less than 1 mm.
- the coupling of the transducer elements with the membrane can be indirect or be done directly, but in any case so that an acoustic coupling is sufficiently possible, ie that suitable vibrations can be transmitted.
- the coupling may, for example, by a press fit, press fit, such as through
- the coupling can also be done by molding the resonator body with the material of the outer skin, which can also be referred to as embedding.
- Indirect coupling may mean that another layer of material is provided between the transducer elements and the membrane, for example, a liquid such as a gel or an oil.
- the further material layer can be provided in particular to the acoustic coupling between the
- the ultrasonic transducer assembly comprises 2 to 50 transducer elements.
- Advantageous are thus powerful multi-element sensors, d. H. Arrays with 2 to 50 transducer elements, provided in so-called concealed mounting.
- the transducer elements are through
- the Kunststoffkompositiata are arranged between the transducer elements, so that they are electrically and mechanically sufficiently isolated from each other.
- this type of arrangement of the transducer elements can also be referred to as embedding in a plastic composite material, by which is meant that the transducer elements in
- the transducer arrangement has at least one
- Front mass and at least one back mass which are made of different materials. Particularly preferred are front and / or back masses for each
- Transducer element provided individually.
- the emitted by the transducer elements for environment sensing electro-acoustic radiation then leaves the transducer assembly preferably in the direction of the front side of the transducer elements, rear radiation is suppressed.
- the back mass is effective as a so-called inertial mass, ie it allows by their Mass inertia, the introduction of force in the front body and thus also serves to damp the vibration relative to the area in which no radiation is desired.
- the front mass is made of a thermosetting or thermoplastic polymer or an elastomer and the back mass of a metal, for example, aluminum, steel or brass.
- a thermosetting or thermoplastic polymer or an elastomer for example, aluminum, steel or brass.
- the ultrasonic transducer assembly has electrodes for contacting the transducer elements.
- the transducer elements are contacted individually electrically.
- a so-called flex foil is used, which is suitable for contacting the transducer elements.
- the flex foil can be glued to the transducer elements, for example, by means of conductive adhesive.
- the transducer elements are coupled at the end face to a first electrode.
- the first electrode is a first flex foil.
- the first electrode or flex foil is also attached to the membrane.
- the first electrode or flex foil is glued to the membrane, for example by means of a conductive adhesive.
- at least one front mass is glued to the first electrode or flex foil and the front mass is arranged between the transducer elements and the first electrode or flex foil.
- the front mass is preferably designed to be conductive, for example, made of a conductive plastic or of a metal, such as aluminum.
- a flex foil which contacts the transducer elements on their side surfaces, which is referred to as the so-called 3-1 effect.
- the transducer elements have electrodes on their side surfaces, which are contacted by the flex foil. Such electrodes can be sputtered onto the transducer elements, for example.
- the flex foil can at the front of the Transducer elements may be arranged and on the one hand glued to this and on the other hand glued to the membrane, or it may be provided, the flex foil on the
- the transducer elements on the opposite side are coupled to a second electrode.
- the second electrode is a second flex foil.
- the invention can be used in particular in those environmental sensors, which are provided for example in the front and / or rear bumper of the vehicle for the purpose of parking assistance and / or collision avoidance.
- ultrasound signals are usually transmitted through a medium such as air or water from an emitter to a receiver or transmitted from an emitter into an environment or detected by an object located in the surrounding ultrasonic signals and the transit time and / or differences in runtime and / or other variables such For example, measured amplitudes and phases of the ultrasonic signals.
- ultrasonic transducers are used which can both emit ultrasonic waves and receive ultrasonic waves. But it can also be provided to use the ultrasonic transducer only as a receiver or only as a transmitter.
- the ultrasound transducer arrangement can be installed in an ultrasound system which comprises a group of ultrasound sensors, wherein at least one, preferably all ultrasound sensors comprise the features of the ultrasound transducer arrangement.
- the ultrasound system can be set up, for example, to a
- Partial environment of the motor vehicle to capture For example, the
- Ultrasonic sensors in the front region for detecting a front-side vehicle environment and / or the ultrasonic sensors in the side region for detecting a side region of the vehicle and / or the ultrasonic sensors in the rear region for detecting a rear environment of the vehicle are each assigned to such an ultrasound system. Typically, this will be four to six sensors in one
- sensors are also positioned in the front bumper so that they have their detection range to the left and to the right. Additionally or alternatively, also in Rear bumper sensors are positioned so that they capture an area to the left and right of the motor vehicle.
- the ultrasound system furthermore has a control device assigned to the respective group and a
- both ultrasonic sensors installed laterally in the front and rear bumpers can be used, as well as those sensors which are installed in a side mirror or in a door section.
- the present invention provides an ultrasonic transducer, which is also suitable for use for flow measurement of fluid media, in particular in the intake and / or exhaust and / or in the exhaust gas recirculation and / or turbocharger of internal combustion engines in the automotive field.
- a method of manufacturing such an ultrasonic transducer assembly configured to transmit and / or receive ultrasound signals.
- the method of manufacture comprises the following steps: a) Producing an array with at least two transducer elements, which are arranged at a distance from one another and which at one end face
- the membrane of the ultrasonic transducer assembly is formed by an outer skin of a component, such as a bumper, side mirror or door area of a motor vehicle.
- the transducer elements are hidden behind the outer skin.
- a motor vehicle has a bumper, a side mirror or a door section and a previously described
- Ultrasonic transducer assembly wherein the membrane of the ultrasonic transducer assembly is formed by an outer skin of the bumper, side mirror or door section, and wherein the transducer elements are arranged hidden behind the outer skin. If the thickness of the outer skin of the bumper or side mirror or of the door section in which the ultrasonic transducer assembly is installed does not correspond to the above-mentioned thicknesses preferred for the acoustic transmission, it may be provided that the bumper, the side mirror or the door section of the motor vehicle in the Area in which the ultrasonic transducer assembly is to be installed,
- FIG. 1 shows an ultrasound transducer arrangement according to a first embodiment
- Figure 2 shows an ultrasonic transducer assembly according to a second embodiment
- Figure 3 shows an ultrasonic transducer assembly according to a third embodiment.
- the ultrasonic transducer assembly 1 illustrated in FIG. 1 in a lateral sectional view according to a first embodiment of the invention comprises, by way of example, eight transducer elements 2 arranged at a distance from one another, which are each coupled at one end face 3 to a membrane 4 and at an opposite side 5 to a back mass 6. Between the eight transducer elements 2 Kunststoffkompositiata 8 are arranged for their mutual spacing.
- the illustrated embodiment comprises two flex films 10, 12, wherein a first flex foil 10 is disposed between the transducer elements 2 and the membrane 4 and the transducer elements 2 each contacted individually at their end faces 3.
- the first flex foil 10 is attached to the membrane 4 by means of a conductive adhesive 14.
- the coupling between the first flex foil 10 and the membrane 4 can be present directly and indirectly, wherein is referred to with an indirect contact, that between the first flex foil 10 and the membrane 4 at least one layer of another material is arranged.
- the conductive adhesive 14 may be such a layer.
- liquid layers such as oil or gel may be provided to enhance the acoustic coupling.
- the second flex foil 12 is arranged between the transducer elements 2 and the back mass 6 and contacts the transducer elements 2 individually on sides 5 which are arranged opposite the end faces 3 with respect to the membrane 4.
- the second flex foil 12 is fastened to the back mass 6 by means of a further adhesive 20.
- the transducer elements 2 form a so-called array 15.
- an array 15 is at least two transducer elements 2, which are arranged at a distance from each other and which are indirectly or directly coupled to at least one back mass 6 on the side 5 opposite the end face 3 ,
- the array 15 here also includes the plastic composite elements 8, the flex films 10, 12 and the
- Coupling be present, for example, by a screw or jamming of the array 15 in the membrane 4, wherein suitable means for this purpose are not shown in Fig. 1. It can be provided that the membrane 4 is made thinner in a contact region 32 than outside the contact region 32, so that the array 15 is at least partially sunk in the contact region 32 in the membrane 4. This has the advantage that the ultrasound transducer arrangement 1 on the one hand can be designed to be sufficiently sensitive for receiving ultrasonic waves or to emit sufficiently strong ultrasound waves on the other hand, the membrane 4 outside the contact region 32 can be made sufficiently thick.
- the ultrasound transducer arrangement 1 shown in FIG. 2 in a lateral sectional view according to a second embodiment of the invention again comprises, by way of example, eight transducer elements 2 arranged at a distance from one another, which are each coupled at their front side 3 to the membrane 4 and at their opposite side 5 to the back mass 6. Between the eight transducer elements 2 Kunststoffkompositiata 8 are arranged for their mutual spacing.
- the exemplary embodiment illustrated comprises only one flex foil 12, which in the context of the invention is referred to as a second flex foil 12.
- the second flex foil 12 is arranged between the transducer elements 2 and the back mass 6 and contacts the transducer elements 2 individually on side surfaces 7, 9 which are neither the front sides 3 nor the opposite sides 5, and form the major surfaces of the transducer elements 2.
- the flex foil 12 contacting surfaces 22, 24, which are guided on the side surfaces 7, 9.
- the contacting surfaces 22, 24 are coated surfaces of the transducer elements 2, which are contacted by the flex foil 12.
- the illustrated electrical contact transverse to the main vibration direction of the transducer element 2 is also referred to as so-called 3-1
- the transducer elements 2 are attached directly to the membrane 4 by means of an adhesive 17.
- the coupling between the transducer elements 2 and the membrane 4 can be present directly and indirectly, wherein an indirect contact means that at least one layer of another material is arranged between the transducer elements 2 and the membrane 4.
- the adhesive 17 may be such a layer.
- liquid layers such as oil or gel may be provided to enhance the acoustic coupling.
- the second flex foil 12 is fastened to the back mass 6 by means of a further adhesive 20.
- the array 15 comprises in the embodiment shown in Figure 2 the
- Transducer elements 2 the Kunststoffkompositiata 8, the second flex foil 12 and the back mass 6.
- a mechanical coupling for example by a
- the membrane 4 is made thinner in the contact region 32 than outside the contact region 32, so that the array 15 is at least partially sunk in the contact region 32 in the membrane 4.
- the ultrasonic transducer assembly 1 illustrated in FIG. 3 in a lateral sectional view according to a third embodiment of the invention again comprises, by way of example, eight transducer elements 2 spaced apart from one another, each with its end face 3 with the membrane 4 and on its opposite side 5 with individual back masses 6 are coupled. Between the eight transducer elements 2 are to their mutual
- the ultrasonic transducer assembly comprises 1 per
- Transducer element 2 each have a back mass 6 and a front mass 26, between which the respective transducer element 2 is arranged.
- the exemplary embodiment illustrated again comprises two flex films 10, 12, wherein the first flex foil 10 is arranged between the transducer elements 2 and the membrane 4 and contacts the transducer elements 2 individually at the front masses 26, which for this purpose have conductor tracks or are made of a conductive material.
- the first flex foil 10 is in turn secured to the membrane 4 by means of the conductive adhesive 14.
- the coupling between the first flex foil 10 and the membrane 4 may be present directly and indirectly as described with reference to FIG.
- the first flex foil 10 is also attached by means of a conductive adhesive to the front masses 26, which is not shown.
- the second flex foil 12 is arranged between the transducer elements 2 and the back masses 6 and contacts the transducer elements 2 individually over the sides 5 opposite the end faces 3.
- the second flex foil 12 is fastened to the back masses 6 again by means of a second conductive adhesive 28.
- the transducer elements 2 are each individually electrically contacted to the back masses 26, which for this purpose
- the array 15 comprises in the embodiment shown in Figure 3 the
- the membrane 4 is made thinner in the contact region 32 than outside the contact region 32, so that the array 15 is at least partially sunk in the contact region 32 in the membrane 4.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013211612.8A DE102013211612A1 (de) | 2013-06-20 | 2013-06-20 | Ultraschallwandleranordnung und Kraftfahrzeug mit einer Ultraschallwandleranordnung |
PCT/EP2014/056577 WO2014202248A1 (de) | 2013-06-20 | 2014-04-02 | Ultraschallwandleranordnung und kraftfahrzeug mit einer ultraschallwandleranordnung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3010649A1 true EP3010649A1 (de) | 2016-04-27 |
EP3010649B1 EP3010649B1 (de) | 2022-03-02 |
Family
ID=50424254
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14714704.5A Active EP3010649B1 (de) | 2013-06-20 | 2014-04-02 | Ultraschallwandleranordnung und kraftfahrzeug mit einer ultraschallwandleranordnung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3010649B1 (de) |
CN (1) | CN105636711A (de) |
DE (1) | DE102013211612A1 (de) |
WO (1) | WO2014202248A1 (de) |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6477299A (en) * | 1987-09-18 | 1989-03-23 | Toshiba Corp | Ultrasonic probe |
DE69111151T2 (de) * | 1990-08-10 | 1996-02-15 | Sekisui Plastics | Schallemissionsfühler. |
US6225728B1 (en) | 1994-08-18 | 2001-05-01 | Agilent Technologies, Inc. | Composite piezoelectric transducer arrays with improved acoustical and electrical impedance |
US5691960A (en) | 1995-08-02 | 1997-11-25 | Materials Systems, Inc. | Conformal composite acoustic transducer panel and method of fabrication thereof |
JP4294798B2 (ja) * | 1998-07-16 | 2009-07-15 | マサチューセッツ・インスティテュート・オブ・テクノロジー | 超音波トランスデューサ |
DE10361316B4 (de) * | 2003-12-19 | 2015-08-27 | Valeo Schalter Und Sensoren Gmbh | Ultraschallwandlervorrichtung |
JP4347885B2 (ja) * | 2004-06-03 | 2009-10-21 | オリンパス株式会社 | 静電容量型超音波振動子の製造方法、当該製造方法によって製造された静電容量型超音波振動子を備えた超音波内視鏡装置、静電容量型超音波プローブおよび静電容量型超音波振動子 |
US7545075B2 (en) * | 2004-06-04 | 2009-06-09 | The Board Of Trustees Of The Leland Stanford Junior University | Capacitive micromachined ultrasonic transducer array with through-substrate electrical connection and method of fabricating same |
US20090082673A1 (en) * | 2007-09-26 | 2009-03-26 | Xuanming Lu | Semiconductor matching layer in a layered ultrasound transducer array |
DE102010018993B4 (de) * | 2010-05-03 | 2021-04-01 | Valeo Schalter Und Sensoren Gmbh | Ultraschallsensor, zugehöriges Herstellungsverfahren und Umfelderkennungssystem |
CN202686117U (zh) * | 2012-06-13 | 2013-01-23 | 浙江吉利汽车研究院有限公司杭州分公司 | 一种汽车防碰撞预警装置 |
-
2013
- 2013-06-20 DE DE102013211612.8A patent/DE102013211612A1/de not_active Withdrawn
-
2014
- 2014-04-02 WO PCT/EP2014/056577 patent/WO2014202248A1/de active Application Filing
- 2014-04-02 EP EP14714704.5A patent/EP3010649B1/de active Active
- 2014-04-02 CN CN201480035224.4A patent/CN105636711A/zh active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO2014202248A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN105636711A (zh) | 2016-06-01 |
WO2014202248A1 (de) | 2014-12-24 |
DE102013211612A1 (de) | 2014-12-24 |
EP3010649B1 (de) | 2022-03-02 |
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