EP3386647A1 - Acoustic transducer arrangement having concentric connecting elements and method for producing an acoustic transducer arrangement having concentric connecting elements - Google Patents
Acoustic transducer arrangement having concentric connecting elements and method for producing an acoustic transducer arrangement having concentric connecting elementsInfo
- Publication number
- EP3386647A1 EP3386647A1 EP16781791.5A EP16781791A EP3386647A1 EP 3386647 A1 EP3386647 A1 EP 3386647A1 EP 16781791 A EP16781791 A EP 16781791A EP 3386647 A1 EP3386647 A1 EP 3386647A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- plate carrier
- sound transducer
- perforated plate
- electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000004519 manufacturing process Methods 0.000 title description 6
- 239000010410 layer Substances 0.000 claims description 47
- 239000000463 material Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000012790 adhesive layer Substances 0.000 claims description 6
- 238000013016 damping Methods 0.000 claims description 5
- 238000005452 bending Methods 0.000 description 9
- 239000002131 composite material Substances 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002985 plastic film Substances 0.000 description 3
- 229920006255 plastic film Polymers 0.000 description 3
- 238000002604 ultrasonography Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 229920006332 epoxy adhesive Polymers 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004695 Polyether sulfone Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 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
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
- B06B1/0607—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements
- B06B1/0622—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements on one surface
-
- 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
- G10K11/004—Mounting transducers, e.g. provided with mechanical moving or orienting device
Definitions
- the invention relates to a sound transducer assembly according to the preamble of claim 1 and a method for producing such
- Document DE 39 20 872 A1 discloses a method for the production of ultrasound layer transducers in which the piezoceramic and thermoplastic plastic material of the layer converter are connected to one another by heat bonding. To generate the heat necessary for bonding, heat loss is produced in the piezoceramic by applying electrical signals.
- Document DE 10 2004 047 814 A1 describes a focusing micromachined ultrasound transducer array which can be used as a focusing clinically usable ultrasound probe. Lateral side by side trained transducer cells are partially wired together electrically to achieve the desired focus of the ultrasonic conversion.
- the sound transducer assembly comprises a hole plate carrier with a plurality of through holes, a plurality of piezoelectric elements and a terminating layer
- Each piezoelectric element in this case has a first electrode and a second electrode. The first electrode faces the second electrode. Within a passage opening, a piezoelectric element is arranged in each case.
- Finishing layer is disposed above the perforated plate carrier and the piezoelectric elements, wherein the second electrodes of the piezoelectric elements with the
- the hole plate carrier laterally between two passage openings at least two concentric webs, which have a common center with one of the two passage openings.
- the terminating layer has a first connection region with the web, which directly adjoins the respective through-opening.
- Biewandlerium is provided in a simple manner.
- the finishing layer has a second connection region, in each case with the web, which follows the web directly adjoining the through-opening.
- the first connection region comprises a weld seam or an adhesive layer
- the second connection region comprises a weld seam or adhesive layer
- finishing layer is designed in one piece.
- the outer layer and the perforated plate carrier have a third connection region.
- the third connection region connects an edge region of the terminating layer to an edge region of the
- connection region as a seal of the entire sound transducer arrangement with respect to z. As moisture and liquids acts.
- the third connection layer comprises a weld seam.
- Sound transducer assembly comprising a perforated plate carrier with several
- the method further comprises contacting first electrodes of the
- Piezo elements by wire bonding wherein the first electrodes are arranged opposite to the second electrodes and connecting the
- the method includes partially filling the through openings with a damping material
- the advantage here is that the transducer assembly can be cost-optimized and easily manufactured.
- Figure 2 shows a second embodiment of the invention
- Figure 3 shows a process for the preparation of the inventive
- FIG. 1 shows a sectional illustration in the xz plane of a first embodiment of the sound transducer arrangement 100.
- the sound transducer arrangement 100 shows, by way of example, three sound transducer elements or bending transducer elements 115 which are arranged parallel to one another and spaced apart from one another.
- a bending transducer element 115 in this case comprises a piezoelement 104, a membrane 114 which uses a
- Finishing layer 103 is formed, a perforated plate support 101 and
- the perforated plate carrier 101 comprises several
- Duchgangsö réelleen 111 and holes and has an upper side and a lower side, which are arranged opposite one another.
- On the top webs 102 are arranged, which are arranged concentrically around the through holes 111.
- the webs 102 in this case directly adjoin the passage openings 111.
- Piezo elements 104 are likewise arranged concentrically with respect to through openings 111, wherein each through opening 111 in each case accommodates a piezoelement 104, which is introduced from the upper side into through opening 111 or terminates flush with the upper side.
- the piezoelectric elements 104 have a smaller diameter than the passage openings 111. In other words, the piezoelement 104 is located within the passage opening 111 or the Hole.
- Each piezo element 104 has a first electrode 105 and a second electrode 106.
- the first electrode 105 is connected to a booster circuit by means of a wire connection, for example, and functions as
- the second electrode 106 is by means of a
- Finishing layer 103 is provided with an electrical ground, for example the
- the piezo elements 104 can be electrically conductively connected via two wire connections to the electrical ground and the amplifier circuit.
- the second electrode 106 is contacted over the edge of the piezoelectric element 104, so that on the side of the first electrode 105 there are two separate electrode regions, which can be contacted separately from one another.
- the piezoelements 104 can be connected to the terminating layer 103 with an electrically nonconductive adhesive layer.
- Each bending transducer element 115 has a first connection region 108, which adjusts or ensures the edge clamping of the bending transducer element 115 or the membrane 114.
- the term "first connection region 108" is understood to mean the regions in which a mechanical connection takes place between the end layer 103 and the web 102 of the perforated plate carrier 101, which adjoins the through-opening 111 directly.
- the first connection portions 108 are concentrically arranged around the through holes 111 and have a larger diameter than the
- Recesses 116 have a distance of 0.1 mm -1 mm to the welds of the first connection regions 108.
- the lateral distance between the bars 102 and the other webs 117 is 0.1 - 2 mm.
- the depth of the recesses 116 comprises at least 0.1 mm.
- Membranes 114 absorb vibration energy and can dissipate.
- second connection regions 109 are arranged concentrically.
- the second connection regions 109 have a lateral distance from the first connection regions 108.
- These second connection regions 109 are arranged on the further webs 117 and also comprise weld seams.
- the second connection regions 109 are arranged on the further webs 117 and also comprise weld seams.
- Connecting areas 109 further concentrically arranged
- the number of concentric connection regions corresponds to the concentric webs 102 and 117 around a through-opening 111.
- a plurality of webs 117 and a plurality of recesses 116 are arranged laterally next to one another around the through-openings 111, a circular web 102 being directly adjacent to the through-openings 111 is arranged. This serves for improved decoupling between two sound transducer elements.
- the recesses 116 may be filled, for example, with a silicone-containing damping material.
- Punch plate carrier 101 a third connection portion 110 is provided.
- the term edge region is understood here to mean an area with a lateral distance to the outer edge of the outer layer of 0.1 mm-1 mm.
- the piezoelectric elements 104 have a thickness of 100 ⁇ - 750 ⁇ , of 150 ⁇ - 500 ⁇ .
- the hole plate carrier 101 has a thickness of 0.5 mm - 15 mm, preferably from 1 mm - 10 mm.
- the final layer 103 has a thickness of 50 ⁇ - 750 ⁇ on.
- Finishing layer 103 is overpaintable and protects the sound transducer assembly 100 against moisture, liquids and mechanical effects.
- a plastic film may be arranged on the finishing layer 103.
- Plastic film is preferably with an epoxy resin adhesive on the
- the epoxy adhesive also acts as a tolerance compensation for the realization of particularly flat surfaces.
- the epoxy adhesive can be scrape.
- the plastic film comprises, for example, polyimide or a composite material of metal and plastic or carbon fiber fabric and resin.
- the end layer 103 comprises metal, e.g. B.
- Finishing layer 103 is completely electrically conductive.
- end layer 103 plastic z. B. PES, PVDF, glass fiber composites or
- Carbon fiber composites wherein the side of the end layer 103, which is connected to the perforated plate support 101, a metal layer.
- the damping material is preferably silicone-containing.
- the basic shape of the piezo elements 104, the bending transducer elements 115 and the passage openings 111 are arbitrary. Preferably, they have regular shapes, z. Square, rectangular, polygonal, circular or elliptical. In a sound transducer assembly 100, the basic shapes of the piezo elements 104, flexural transducer elements 115, and through holes 111 may be the same or different.
- the acoustic transducer assemblies 100 may have a number of 2 - 250
- FIG. 1b shows a plan view of the first embodiment of the sound transducer arrangement 100 according to the invention.
- three bending transducer elements 115 are shown, which are arranged parallel to one another or in a line to one another.
- the rectangular end layer 103 is shown, which are the three Piezo elements 104 covered.
- the first connection region 108 which adjusts the edge stress of the respective bending transducer
- the second connection region 109 which acts as a decoupling between the bending transducers and the third connection region 110, for example
- FIG. 2 shows a sectional illustration in the xz plane of a second embodiment of the sound transducer arrangement 200.
- FIG. 2 which represent the same features as in FIG. 1 have identical rear locations of the reference symbols as in FIG. In FIG. 2, the first connection regions 208, which
- FIG. 3 shows the method for producing a sound transducer arrangement which has a perforated plate carrier with a plurality of through openings and a plurality of concentric bars, a plurality of piezoelements and a terminating layer.
- the method 300 starts with a step 310, in the second
- Electrodes of the piezo elements are connected to the terminating layer.
- first electrodes of the piezoelectric elements are electrically connected or contacted by wire bonding. This is the first
- the passage openings are at least partially with a
- Filling material is filled, especially from the side, by the
- the acoustic transducer assemblies 100 and 200 find in motor vehicles, moving or stationary machines, such as robots, driverless transport systems,
- the sound transducer assembly 100 and 200 in e-bikes, electric Wheelchairs and aids are used to assist physically disabled people.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015224772.4A DE102015224772A1 (en) | 2015-12-10 | 2015-12-10 | Sound transducer arrangement with concentric webs and method for producing a sound transducer arrangement with concentric webs |
PCT/EP2016/074679 WO2017097473A1 (en) | 2015-12-10 | 2016-10-14 | Acoustic transducer arrangement having concentric connecting elements and method for producing an acoustic transducer arrangement having concentric connecting elements |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3386647A1 true EP3386647A1 (en) | 2018-10-17 |
Family
ID=57136889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16781791.5A Withdrawn EP3386647A1 (en) | 2015-12-10 | 2016-10-14 | Acoustic transducer arrangement having concentric connecting elements and method for producing an acoustic transducer arrangement having concentric connecting elements |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3386647A1 (en) |
CN (1) | CN108367314A (en) |
DE (1) | DE102015224772A1 (en) |
WO (1) | WO2017097473A1 (en) |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4754440A (en) * | 1985-12-27 | 1988-06-28 | Aisin Seiki Kabushikikaisha | Ultrasonic transducer |
DE3920872A1 (en) | 1989-06-26 | 1991-01-03 | Siemens Ag | Hot bonding thermoplastic material to piezoelectric material - in transducer mfr., by surface fusing thermoplastic material |
US5220538A (en) * | 1991-08-08 | 1993-06-15 | Raytheon Company | Electro-acoustic transducer insulation structure |
JPH1152958A (en) * | 1997-08-05 | 1999-02-26 | Murata Mfg Co Ltd | Piezoelectrric type electro-acoustic transducer |
CN1234470C (en) * | 2002-07-17 | 2006-01-04 | 陕西师范大学 | High-stability supersonic transducer and its making process |
US20050075572A1 (en) | 2003-10-01 | 2005-04-07 | Mills David M. | Focusing micromachined ultrasonic transducer arrays and related methods of manufacture |
JP2008191007A (en) * | 2007-02-05 | 2008-08-21 | Denso Corp | Structure for mounting sensor device |
DE102011079646A1 (en) * | 2011-07-22 | 2013-02-07 | Robert Bosch Gmbh | Ultrasonic sensor device for detecting and / or transmitting ultrasound |
DE102014207681A1 (en) * | 2014-04-24 | 2015-10-29 | Robert Bosch Gmbh | Membrane for an ultrasonic transducer and ultrasonic transducer |
-
2015
- 2015-12-10 DE DE102015224772.4A patent/DE102015224772A1/en not_active Withdrawn
-
2016
- 2016-10-14 WO PCT/EP2016/074679 patent/WO2017097473A1/en unknown
- 2016-10-14 EP EP16781791.5A patent/EP3386647A1/en not_active Withdrawn
- 2016-10-14 CN CN201680072499.4A patent/CN108367314A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2017097473A1 (en) | 2017-06-15 |
DE102015224772A1 (en) | 2017-06-14 |
CN108367314A (en) | 2018-08-03 |
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Legal Events
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DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: ROBERT BOSCH GMBH |
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Effective date: 20201218 |
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18D | Application deemed to be withdrawn |
Effective date: 20210501 |