CN108475501A - Acoustic transducer assembly - Google Patents
Acoustic transducer assembly Download PDFInfo
- Publication number
- CN108475501A CN108475501A CN201680079565.0A CN201680079565A CN108475501A CN 108475501 A CN108475501 A CN 108475501A CN 201680079565 A CN201680079565 A CN 201680079565A CN 108475501 A CN108475501 A CN 108475501A
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- China
- Prior art keywords
- acoustic transducer
- transducer assembly
- retaining element
- assembly according
- retaining
- 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.)
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Links
- 239000000463 material Substances 0.000 claims abstract description 21
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 230000000694 effects Effects 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims description 31
- 239000002184 metal Substances 0.000 claims description 31
- 239000000126 substance Substances 0.000 claims description 15
- 238000013016 damping Methods 0.000 claims description 14
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- 229920001971 elastomer Polymers 0.000 claims description 9
- 239000000806 elastomer Substances 0.000 claims description 9
- 239000000919 ceramic Substances 0.000 claims description 8
- 239000004411 aluminium Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 238000009832 plasma treatment Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 230000002463 transducing effect Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims 1
- 239000012528 membrane Substances 0.000 description 14
- 238000001465 metallisation Methods 0.000 description 7
- 239000011159 matrix material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000005457 optimization Methods 0.000 description 4
- 239000007767 bonding agent Substances 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 239000012876 carrier material Substances 0.000 description 2
- 230000019771 cognition Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
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
- 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
- G10K9/125—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 with a plurality of active elements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/13—Acoustic transducers and sound field adaptation in vehicles
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Signal Processing (AREA)
Abstract
The present invention relates to a kind of acoustic transducer assembly (100), with the multiple element of transducers (10) being connect with a common retaining element (20), wherein, each element of transducer (10) has at least one piezoelectric element (15) with carrier element (11) effect connection ground arrangement, and wherein, the carrier element (11) connect with the retaining element (20), it is characterized in that, the retaining element (20) is more than 350x 10 by elasticity modulus3N/mm2, be preferably from about 400x 103N/mm2It is more than 2.5g/cm with density3Material composition.
Description
The prior art
The present invention relates to a kind of 1 acoustic transducer assemblies as described in the preamble according to claim, as by applicant
As 10 2,010 062 990 A1 of DE are known.At least one piezoelectricity member is respectively provided in known acoustic transducer assembly
Multiple element of transducers of part are illustratively parallelly arranged with small spacing on stationary plane or retaining element.In each transducing
Connection between device element and stationary plane can be realized by the sealed connection of material or by being mechanically connected.Each especially one
The element of transducer of construction is caused to be respectively provided with the carrier element with such as U-shaped cross-section, wherein two sides of carrier element
It is connect with stationary plane.In addition, element of transducer has sound acting surface (schallwirksame), the sound acting surface with
Be arranged to be used in association with the piezoelectric element of sound acting surface effect connection, allow element of transducer as radiated element or
Receiving element is run.This acoustic transducer assembly is used especially as the component part of the driver assistance system in vehicle, especially
It is used for range measurement of the vehicle relative to the related object of such as in parking process.It is not obtained about solid by above-mentioned document
Determine the details of the electrical contact of face (being disposed with element of transducer on the stationary plane) and element of transducer.
Hitherto known acoustic transducer assembly should be constructed compactly as far as possible when especially using in the car, that is, be had to the greatest extent
May small bottom surface and structure height as small as possible, thus the acoustic transducer assembly especially can with there is no problem be mounted on
In the region of bumper.Thus the expectation using as thin as possible stationary plane or corresponding thin retaining element is generated, to make sound
The structure height of transducer assemblies keeps as small as possible.Similarly, the bottom surface of stationary plane is answered as small as possible, can equally to make
The cross section of acoustic transducer assembly configuration as small as possible.
For element of transducer as the fault-free function of radiated element or receiving element importantly, each energy converter is first
Part is as unaffected as possible relative to each other on acoustics or vibrotechnique.Additionally, it is important that element of transducer in stationary plane or
It is rigidly attached as far as possible with the stationary plane or retaining element in the region of retaining element.Herein, it is important that be not only clamped
Element of transducer and also retaining element all have self-vibration characteristic.Here, there is the natural resonance frequency of retaining element and its again
Frequently.If these natural resonances are with corresponding amplitude height in the running frequency range of element of transducer, for example 48kHz's
Occur in range, then this leads to significant crosstalk or influence between each element of transducer, and thus causes to know in object
Occur so-called undesirable secondary lobe (Nebenkeulen) and ambiguity related to this when other.
Invention content
By the prior art, the task of the present invention is improve in this way described in preamble according to claim 1
Acoustic transducer assembly so that influence when the acoustic transducer assembly is run between acoustic transducer element relative to each other is most
It may be small.According to the present invention, which is solved by the acoustic transducer assembly with claim 1 feature.
Idea of the invention is that by the geometry of retaining element, that is, passing through its length, width and thickness and going back
The frequency position of the intrinsic frequency of retaining element is mainly determined by the size of the elasticity modulus of the material of retaining element and density
It sets and amplitude.As started to illustrate in " prior art " paragraph, the geometry size of this retaining element is only capable of
It is enough to be realized in very small limit, because acoustic transducer assembly should for example have full-size or structure height.In addition, this hair
It is bright to utilize following cognition：This retaining element has the natural vibration characteristic of optimization, that is, if retaining element is with big springform
Amount and big density construct as far as possible thickly, while being constructed with desired small length and width, then the retaining element is
It is very rigid.These cognitions mentioned lead to acoustic transducer assembly according to claim 1, in the acoustic transducer assembly,
If retaining element is more than 350x 10 by elasticity modulus3N/mm2, be preferably from about 400x 103N/mm3It is more than 2.5g/cm with density3
Material composition, then can realize the natural vibration characteristic of optimization in an advantageous manner.This size this material in other words
The premise used is can to construct following acoustic transducer assembly, in the acoustic transducer assembly, if the thickness of the retaining element
Degree is at least 5mm, then the crosstalk damping needed between each element of transducer can reach the range of 20dB or bigger.
This, the size (thickness) of the retaining element particularly depends on the selection for material used in retaining element.
The advantageous extension scheme of acoustic transducer assembly according to the present invention is proposed in the dependent claims.
In order to which one side can realize the structure height as small as possible of acoustic transducer assembly, and on the other hand can use up
May simply the manufacture of configuration retaining element and the big surface of possibility of most retaining element be capable of providing for arranging transducing
Device element, is set as, depending on the selection according to used material.For retaining element with the shape design of plate, the thickness of the plate is preferred
In 3mm between 6mm.
Consider to use such as technical ceramics, especially aluminium oxide as the material for the retaining element.This technology
Ceramics not only meet the requirement of the relatively high density set by the present invention, also meet the requirement of high elastic modulus.
Particularly with following situations, i.e. retaining element is applied not only to being mechanically fixed or coupling for element of transducer, Er Qieyong
In the electrical contact of element of transducer and/or other electronic components arranged with retaining element effect connection, it is advantageous to described solid
The material for determining element has metal, especially aluminium or steel.
The case where retaining element is made of technical ceramics could be provided as to construct desired electric conductivity, Gu
Determine element and is equipped with preferred entire metal layer at least on the side towards element of transducer.
In the specific preferred configuration of this metal layer, which typically has between 8 μm and 20 μm
The sheet resistance of thickness and about 0.015 Ω.
This will be explicitly pointed out, this retaining element not only can by unique material, for example by technical ceramics or by
A kind of metal composition, and can also in the form of sandwich be stacked arrangement, made of the material being previously mentioned it is each
Layer composition.Therefore for example it is contemplated that the sandwich of setting core made of technical ceramics, the sandwich are covered in both sides
With metal layer or sheet metal.
It can also be arranged, the retaining element is applied not only to arrangement element of transducer, and is also used for arranging electronic simultaneously
Component, so as to voltage that analyzing processing is generated by piezoelectric element or being capable of electricity manipulation piezoelectric element.Here, in fixed member
The particularly compact or advantageous arrangement that this component can be realized on the side of element of transducer of part.
Here, in order to construct electrical contact between the both sides of retaining element or connection advantageously, the retaining element
Metal layer is equipped on the side away from element of transducer, and the both sides of the retaining element are by being arranged in retaining element
Side on another metal layer or by means of especially be in flexible film form connecting element or by means of being arranged in
Plated hole conductive in retaining element it is connected with each other.It is also possible that the retaining element described in metal construction completely.It is flexible
Film is interpreted as carrier material flexible in the sense of the present invention, by it is at least one for example in conductor rails or similar type metal
Change portion is applied on the carrier material.
It for the electrical contact of element of transducer and retaining element, is preferably arranged to, is fixed with the load of piezoelectric element on it
Volume elements part is connect by means of conducting resinl with retaining element.Consider isotropic and anisotropic conducting resinl as conducting resinl.
It is noted that the high adhesion strength of bonding connection.By be bonded counterpart (element of transducer and retaining element) plasma treatment or
Etch significantly improves the adhesion strength of bonding connection, and thus the clamping of element of transducer correspondingly becomes fixed.Due to conduction
The corresponding loading of the small layer thickness and conductive particle of glue can ignore introduced elasticity.
As described above, this element of transducer, which acts not only as radiated element, can also be used as receiving element operation or behaviour
Control.In addition it is also known that, this acoustic transducer assembly is constructed in this way so that be not only provided with radiated element and be equipped with receiving element.
Particularly with acoustic transducer assembly not only with radiated element but also with receiving element the case where, acted as radiated element
Optimization acoustics uncoupling between the element of transducer used and the element of transducer to work as receiving element can by with
Under type constructs：The retaining element has at least two subelements, that is, has the of the groove particular with closed outline
A part of element and the second part element that inside grooves are arranged in the case where constituting gap, wherein the gap is at least
It is partially filled with elastomer, and wherein, being disposed at least two in each subelement in the subelement changes
It can device element.Here, the element of transducer to work as radiated element is for example disposed in a subelement, and
The element of transducer to work as radiated element is arranged on another part element.Pass through the elasticity preferably with small elastic modulus
Body realizes the machinery between two subelements of retaining element or acoustics uncoupling.Here, the gap can want
Or only dotted being filled by elastomer-filled completely.It may be set to be, it is real with injection molding method or pouring procedure
Existing gap filling.
If the element of transducer has the U-shaped cross-section of the sound acting surface with rectangle, wherein as radiated element
The longitudinal axis of the sound acting surface of the element of transducer to work is relative in the element of transducer to work as receiving element
The longitudinal axis of the sound acting surface of at least several element of transducers rotates preferably 90 ° ground arrangements, then can realize as transmitting member
The optimization or improvement of the direction feature of the transmitted wave for the element of transducer that part works.
Measure as other damping measures or for acoustics uncoupling could be provided as, in element of transducer region
And/or existing intermediate space is filled with damping substance between element of transducer.This damping substance is for example by Fermasil
Or the damping material composition of other preferred elasticity.
This damping substance is supplied or is metered into the region of element of transducer, this may be assembled in acoustic transducer assembly
Relative difficulty ground configuration in the case of in the housing.Therefore, the relatively simple of substance is damped in order to be realized in processing technology
Single supply, is set as in preferred configuration, retaining element with the fixed fixed area of carrier element outside have at least one
A pass through openings are supplied to that will damp substance in the intermediate space of element of transducer.It is possible thereby to be changed from deviating from for retaining element
The side of energy device element realizes that the supply of damping substance, mode are, such as is opened by perforation by matching metering pin by substance is damped
Mouth is introduced into the intermediate space of element of transducer.Ensure to import by the pass through openings in retaining element in other words to simplify
With metering pin, pass through openings can have on the side away from element of transducer for example imports bevel edge.
As described above, being not only due to mechanical reason and also due to the reason of electric conductivity, it is desirable to retaining element with
Reliable and fixed connection is constructed between element of transducer.The adhesion strength of the connection is considered as the mark important to this
It is accurate.In order to improve or ensure adhesion strength, it is advantageous to the retaining element and/or element of transducer be it is surface treated,
Particularly by plasma treatment or pass through etch.
So far the preferred application range of the acoustic transducer assembly is the driver assistance system field in vehicle, especially
Range measurement for object.But the present invention should not be limited to this kind of application.Especially it is also contemplated that in 3D environmental sensors
In application, such as the acoustic transducer assembly in robot field, in the security system as space monitor or ground transport
It is required in defeated vehicle.Here, distance of the object/person relative to acoustic transducer assembly is not only obtained based on ultrasound, but also
Angle or position of the object/person relative to sonic transducer can be obtained.
Description of the drawings
Other advantages, features, and details of the present invention are obtained by following description of preferred embodiments and with reference to attached drawing.
Attached drawing is shown：
Fig. 1 shows to be arranged in multiple element of transducers on retaining element using perspective representation and is changed as sound according to the present invention
The component part of energy device assembly；
Fig. 2 tools are there are three the sectional view of the acoustic transducer assembly of element of transducer, the energy converter in the acoustic transducer assembly
Element conductive contact using flexible membrane with retaining element；
The vertical view of Fig. 3 retaining elements, the front and back of the retaining element by means of plated through-hole it is electrically conductive connect；
The cross section of Fig. 4 retaining elements, the front and back of retaining element is by being arranged on side in the cross section
Metallization be conductively connected；
The vertical view of the retaining element for the various configuration that Fig. 5 and Fig. 6 is made of two subelements respectively；
Vertical view that Fig. 7 is such as constructed according to Fig. 5 or 6 and the retaining element equipped with multiple element of transducers on upside
Figure.
The element of identical element or identical function is furnished with identical reference numeral in the accompanying drawings.
Specific implementation mode
Acoustic transducer assembly 100 as shown in figs. 1 and 2, the acoustic transducer assembly is especially as the driver in vehicle
The component part of auxiliary system is used to measure the distance relative to object.Here, acoustic transducer assembly 100 is preferably placed in vehicle
Before or after bumper region in.
In embodiment shown in fig 1 and 2, the acoustic transducer assembly 100 in unshowned shell in the accompanying drawings is arranged
Including three element of transducers unanimously constructed 10.But the present invention is not limited to the arrangement of three element of transducers 10.Each
Element of transducer 10 has carrier element 11 taking the shape of the letter U in cross-section, being preferably made of metal such as aluminium.Carrier element 11 has
There is the sound acting surface 12 of rectangle, which forms vibratile diaphragm.Face 12 in other words diaphragm by carrier element 11 base
The formation of body 16 stretches out two fixed sides 17,18 from the matrix.Sound acting surface 12 and the effect connection of piezoelectric element 15 ground arrangement.
Between piezoelectric element 15 is arranged in fixed side 17,18 on side of the matrix 16 towards fixed side 17,18 and by
It is connect with matrix 16 in conducting resinl 44.But 10 2,010 062 990 A1 of DE for being corresponding to applicant are also at the present invention's
In range, the piezoelectric element 15 or multiple piezoelectric elements 15 are arranged on the another location of carrier element 11.
Three element of transducers 10 being arranged in the embodiment according to Fig. 1 and 2 relative to each other with small spacing parallelly
It is arranged on retaining element 20.Also other arrangements of element of transducer 10 can be realized.Retaining element 20 is with rectangular cross-sectional
The form of the plate 21 in face constructs.Depending on used material, the thickness D of plate 21 is for example in 3mm between 12mm.Plate 21
Length for example in 40mm between 50mm, and width B in 25mm between 35mm.Or the material of plate 21 is made of metal,
It is preferred that aluminium or steel, such as V4A or being made of technical ceramics, especially aluminium oxide.It is more than in addition, the material of plate 21 has
350x 103N/mm2, preferably from about 400x 103N/mm2Elasticity modulus and be more than 2.5g/cm3Density.
The case where being made of technical ceramics for the material of plate 21 is set as, the upside towards element of transducer 10 of plate 21
It is preferred that being equipped with metal layer 22 by entire surface.Adhesion strength of the metal layer 22 on plate 21 is located at about 200N/mm2Range in.
In order to realize that desired adhesion strength can make the upside of plate 21 bear surface treatment, especially plasma treatment or etch.
The thickness of metal layer 22 is generally about between 8 μm to 20 μm, and with the surface electricity within the scope of about 0.015 Ω
Resistance.It is preferably set to, the material of metal layer 22 contains tungsten.
The fixed side of two of carrier element 11 17,18 is by means of conductive bonding agent 23 and plate 21 retaining element in other words
20 upside connection.Depending on desired characteristic or contact technique, isotropic and anisotropic bonding agent is used
23 are used as bonding agent 23.
For retaining element 20 by metal, for example by aluminium or the case where be made of steel, in order to realize that conductive surface does not need
Equipped with metal layer 22.Even so, which can be for example arranged for realizing special conductive characteristic or determination
Surface characteristic.
In addition, within the scope of the invention, retaining element 20 or plate 21 are not only constructed by unique element, but also by multiple
Element constructs, and the element is mutually both mechanically connected in the form of sandwich and preferred connects electricly.
Such as can be seen that specifically referring to Fig. 2, plate 21 the circuit carrier 28 on the back side of element of transducer 10 with conductor
Plate 21 is connect the form of plate in other words with retaining element 20.Circuit carrier 28 has the electronic circuit not being shown specifically, the electronics
The electronic component 30 in ASIC forms that circuit has circuit member and/or can be seen that in fig. 2.Circuit carrier 28 and plate 21
Downside is conductively connected in the case where centre is equipped with flexible membrane 35.In addition, the downside of plate 21 by partially metallised portion 36,37 with
Flexible membrane 35 is conductively connected.It is equipped with Electric plug with shutter 38 on the side of plate 21 in circuit carrier 28 and is used for element of transducer
10 or acoustic transducer assembly 10 electrical contact.
Flexible membrane 35 make plate 21 in other words retaining element 20 two opposite sides be connected with each other.Flexible membrane 35 is with ring thus
39 or the shape of arc be directed on the upside of plate 21, and beside in the element of transducer 10 a element of transducer
It is conductively connected by conducting resinl interconnecting piece 41 and metal layer 22 in region.It is set on the side opposite with ring 39 of plate 21
Another ring 42 of flexible film 35, the ring are used for the electrical contact of piezoelectric element 15, such as can be seen that specifically referring to Fig. 2 that
Sample.Flexible membrane 35 is particularly by another ring 42 by means of conducting resinl 43 and piezoelectric element 15 opposite with corresponding matrix 16
It is connected on the side set.In the shown embodiment, the ring 39 of flexible membrane 35 or metal layer 22 form electrical ground.Pass through ring
39 make the metal layer 22 being located in ground potential be connect with the electrical ground of circuit carrier 28.In addition, working as three energy converter members
These three element of transducers are electrically in parallel when part 10 is run as radiated element.Element of transducer 10 is acted as receiving element
With the case where, piezoelectric element 15 is individually transferred to circuit carrier 28 by the ring 42 of flexible membrane 35.
It addedly mentions, being electrically connected between flexible membrane 35 and plate 21 or circuit carrier 28 is realized in which can also be different.
For instance it can be possible that flexible membrane 35 is coupled with plug-in connector, the plug-in connector be located at circuit carrier 28 away from plate 21
On side.Also, it is contemplated that circuit carrier 28 is configured to so-called rigid flex-circuits plate together with flexible membrane 35.Flexible membrane 35 is for example
It can also terminate at partially metallised portion 36,37, and not construct middle layer.In addition it is contemplated that flexible membrane 35 is in side
On circuit carrier 28 or on (downside) side away from plate 21 of circuit carrier 28 for example by conducting resinl interconnecting piece or
Person's brazed joints contact.
With reference to Fig. 2 be also seen that element of transducer 10 sound acting surface 12 or matrix 16 and bumper (not shown) it is outer
It closes with flushing side.The acoustic vibration generated by piezoelectric element 15 is transmitted by sound acting surface 12, or will be by element of transducer 10
The acoustic vibration received by environment is transmitted on piezoelectric element 15.It can also be in plate 21 away from soft between each piezoelectric element 15
It is respectively equipped with elastomer 46 on the side of property film 35.Elastomer 46 is used for acoustic damping, uncoupling and the sealing of element of transducer 10.
In addition can be arranged, the intermediate space constructed between element of transducer 10 structure such as between fixed side 17,18
The intermediate space made is filled by damping substance 47 like that.Damp substance 47 especially elastomer, such as Fermasil or other
With and without the damping material of gas inclusions.It can also be the damping mat being lining into damp substance 47.In order to which substance 47 will be damped
Being introduced into intermediate space can be arranged, and such as can be seen that with reference to Fig. 2 and 3, and plate 21 has at least one outside fixed area 24,25
A pass through openings 48, the pass through openings have bevel edge 49 in plate 21 on the side of element of transducer 10.In order to which dosage hinders
Buddhist nun's substance 47 for example can will be inserted through pass through openings 48 with metering pin.
In so far the embodiment described, the front of plate 21 is conductively connected with its back side by flexible membrane 35.Referring now to
Fig. 3 and 4 is illustrated in the bodyfixed frame that is electrically connected of the plate 21 in other words between the front with the back side of retaining element 20.In figure 3 may be used
To find out, plate 21 on 48 side of pass through openings there are multiple pass through openings 51, these pass through openings to make the front and the back side of plate 21
Connection.It can be constructed in metal layer 22 and in plate 21 by means of (unanimously being constructed with pass through openings 48) pass through openings 51
Plated through-hole between the metallization constructed on the other side, mode are to construct with making the metallization of pass through openings 51.In addition,
Pass through openings 51 can be used for dosage damping substance 47.
Following situations is shown in FIG. 4, the side 52 of plate 21 is equipped with metallization 53 in this case, which will
The metallization 54 (element of transducer 10 is arranged on the metallization) constructed on front is constructed on the back side of plate 21
Metallization 55 be electrically connected to each other.
So far described plate, the retaining element 20 with rectangular base outline be configured to integral member.Corresponding to Fig. 5
It can also be arranged with 6, retaining element 20 is made of two subelements 61,62.Here, first part's element 61 is for example in centre
There is the groove 63 in nicked form in region, the illustratively part with approximating square basal plane is disposed in the groove
Element 62.The gap 65 of side trend is formed between two subelements 61,62.In embodiment shown in fig. 5,
Gap 65 is filled by elastomer 66 completely.Elastomer 66 especially have relatively small elasticity modulus, so as to make both parts about element 61,
62 acoustically uncouplings relative to each other.In embodiment shown in figure 6, two subelements 61,62 are only by recessed
The elastomer 66 arranged in the corner region of slot is connected with each other.
Or element of transducer 10 can be used as radiated element operation or receiving element can be used as to run.Especially exist
Corresponding in the embodiment for being made of retaining element 20 two subelements 61,62 of Figure 4 and 5, it is advantageous to for example in portion
It is only disposed with receiving element on subelement 61, and radiated element is only disposed on another part element 62.Corresponding to Fig. 7's
Diagram illustratively arranges that three parallel arranged element of transducers 10 are used as radiated element on second part element 62
It works.The longitudinal axis 67 of the element of transducer 10 or sound acting surface 12 moves towards with being parallel to the long side of rectangular slab 21.With this
Relatively, multiple element of transducers 10 for being configured to receiving element are disposed on first part's element 61.Especially find out, in cloth
Set 10 narrow side of element of transducer on second part element 62 both sides arrangement there are two or an element of transducer 10, it is described
The longitudinal axis 67 of the longitudinal axis 68 of element of transducer and the element of transducer 10 being arranged on second part element 62 is at a right angle
Arrangement.
So far the acoustic transducer assembly 100 can be changed or retrofited by various forms and mode, without departing from hair
Bright thought.The electrical contact of each element of transducer 10 can be especially realized with method by other means.Such as work as carrier element
10 not by metal but when being for example made of plastics be such case.Need not also be constructed on the both sides of retaining element 20 or
It is disposed with metal layer 22.Electronic unit or circuit carrier 28 equally can dividually be arranged with retaining element 20.
Claims (15)
1. acoustic transducer assembly (100) has the multiple element of transducers (10) being connect with a common retaining element (20),
Wherein, each element of transducer (10) has at least one piezoelectric element with carrier element (11) effect connection ground arrangement
(15), and wherein, the carrier element (11) connect with the retaining element (20), which is characterized in that the retaining element
(20) 350x10 is more than by elasticity modulus3N/mm2, be preferably from about 400x103N/mm2It is more than 2.5g/cm with density3Material group
At.
2. acoustic transducer assembly according to claim 1, which is characterized in that the retaining element (20) is with the shape of plate (21)
Columnar structure, the thickness (D) of the plate 3mm between 20mm, preferably in 3mm between 6mm.
3. acoustic transducer assembly according to claim 1 or 2, which is characterized in that the material of the retaining element (20) has
There are technical ceramics, especially aluminium oxide.
4. acoustic transducer assembly according to any one of claim 1 to 3, which is characterized in that the retaining element (20)
Material have metal, especially aluminium or steel.
5. acoustic transducer assembly according to claim 3 or 4, which is characterized in that the retaining element (20) is at least in face
It is equipped with preferred entire metal layer (22) to the side of the element of transducer (10).
6. acoustic transducer assembly according to claim 5, which is characterized in that the metal layer (22) has at 8 μm extremely
The sheet resistance of thickness and about 0.015 Ω between 20 μm, and in the retaining element (20) and the metal layer (22)
Between be formed in 170N/mm2To 230N/mm2Between, be preferably from about 200N/mm2Adhesion strength.
7. acoustic transducer assembly according to claim 5 or 6, which is characterized in that the retaining element (20) is away from institute
The side for stating element of transducer (10) is equipped with metal layer (36,37；55) it or by metal forms, and the retaining element
(20) both sides by means of another metal layer (53) for being arranged on the side (52) of the retaining element (20) or by
It is used to constitute in the connecting element (35) for being especially in flexible film form or by means of being arranged in the retaining element (20)
The pass through openings (51) of plated through-hole are conductively interconnected.
8. acoustic transducer assembly according to any one of claim 1 to 7, which is characterized in that the carrier element (11)
It is connect with the retaining element (20) by means of conducting resinl (23).
9. acoustic transducer assembly according to any one of claim 1 to 8, which is characterized in that the retaining element (20)
With at least two subelements (61,62), that is, there is first part's element of the groove (63) particular with closed outline
(61) and in the case where constituting gap (65) the second part element (62) being arranged in the groove (63), wherein described
Gap (65) is at least partially filled with elastomer (66), and each subelement in the subelement (61,62)
On be disposed at least two element of transducers (10).
10. acoustic transducer assembly according to claim 9, which is characterized in that in first or second subelement (61,62)
On be disposed with multiple element of transducers (10) in parallel to work as radiated element, and second or first part's element
The element of transducer (10) to work as receiving element is disposed on (62,61).
11. acoustic transducer assembly according to claim 10, which is characterized in that the load of the element of transducer (10)
Volume elements part (11) has the U-shaped cross-section with rectangle sound acting surface (12), also, the energy converter to work as radiated element
The longitudinal axis (67) of element (10) is relative at least several transducings in the element of transducer (10) to work as receiving element
The longitudinal axis (68) of device element rotates preferably 90 degree ground arrangements.
12. acoustic transducer assembly according to any one of claim 1 to 11, which is characterized in that in the carrier element
(11) existing intermediate space is filled with damping substance (47) in region and/or between carrier element (11).
13. acoustic transducer assembly according to claim 12, which is characterized in that the retaining element (20) with the load
Outside volume elements part (11) fixed fixed area (24,25) there are at least one pass through openings (48) to be used for the damping substance
(47) it is supplied in intermediate space.
14. acoustic transducer assembly according to any one of claim 1 to 13, which is characterized in that the retaining element
(20) and/or the carrier element (11) is surface treated, particularly by plasma treatment or passes through etch.
15. the acoustic transducer assembly according to any one of claim 1 to 14, which is characterized in that the sonic transducer group
Part is configured to auxiliary system, driver assistance system in preferred vehicle or control system or regulating system composition portion
Point.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016200657.6 | 2016-01-20 | ||
| DE102016200657.6A DE102016200657A1 (en) | 2016-01-20 | 2016-01-20 | Transducer array |
| PCT/EP2016/080448 WO2017125202A1 (en) | 2016-01-20 | 2016-12-09 | Acoustic transducer arrangement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108475501A true CN108475501A (en) | 2018-08-31 |
| CN108475501B CN108475501B (en) | 2023-06-02 |
Family
ID=57544424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680079565.0A Active CN108475501B (en) | 2016-01-20 | 2016-12-09 | Acoustic transducer assembly |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3405945A1 (en) |
| KR (1) | KR20180104000A (en) |
| CN (1) | CN108475501B (en) |
| DE (1) | DE102016200657A1 (en) |
| WO (1) | WO2017125202A1 (en) |
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- 2016-12-09 EP EP16810328.1A patent/EP3405945A1/en not_active Withdrawn
- 2016-12-09 WO PCT/EP2016/080448 patent/WO2017125202A1/en active Application Filing
- 2016-12-09 CN CN201680079565.0A patent/CN108475501B/en active Active
- 2016-12-09 KR KR1020187023482A patent/KR20180104000A/en not_active Application Discontinuation
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20180104000A (en) | 2018-09-19 |
| CN108475501B (en) | 2023-06-02 |
| DE102016200657A1 (en) | 2017-07-20 |
| WO2017125202A1 (en) | 2017-07-27 |
| EP3405945A1 (en) | 2018-11-28 |
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