EP3386650A1 - Schallwandleranordnung mit zwei parallel angeordneten stegen und verfahren zur herstellung einer schallwandleranordnung mit zwei parallel angeordneten stegen - Google Patents
Schallwandleranordnung mit zwei parallel angeordneten stegen und verfahren zur herstellung einer schallwandleranordnung mit zwei parallel angeordneten stegenInfo
- Publication number
- EP3386650A1 EP3386650A1 EP16788685.2A EP16788685A EP3386650A1 EP 3386650 A1 EP3386650 A1 EP 3386650A1 EP 16788685 A EP16788685 A EP 16788685A EP 3386650 A1 EP3386650 A1 EP 3386650A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- sound transducer
- transducer assembly
- electrode
- perforated plate
- 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
- 238000004519 manufacturing process Methods 0.000 title description 5
- 239000010410 layer Substances 0.000 claims description 41
- 238000000034 method Methods 0.000 claims description 8
- 239000012790 adhesive layer Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000013016 damping Methods 0.000 claims description 4
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- 238000005452 bending Methods 0.000 description 10
- 239000012528 membrane Substances 0.000 description 5
- 238000002604 ultrasonography Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000523 sample 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
-
- 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
- G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
- G10K9/22—Mountings; Casings
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 arrangement comprises a perforated plate carrier with a plurality of through openings, a plurality of piezo elements and a terminating layer.
- Each piezoelectric element 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 perforated plate carrier has at least two webs arranged laterally spaced apart between two through-openings.
- the terminating layer has first connecting regions with the webs which adjoin the through-opening directly.
- the end layer in each case has a second connection region with the web which follows the web directly adjacent to the through-opening.
- the first connection region comprises a weld seam or an adhesive layer.
- the second connection layer comprises a weld seam or adhesive layer.
- finishing layer is integrally formed.
- the cover layer has two slots each, which are arranged symmetrically to a piezoelectric element spaced, wherein the slot ends are connected to the first connection areas.
- the slots are rectangular.
- the advantage here is that square piezo elements can be used.
- the slots are designed arcuate.
- the method according to the invention for producing a sound transducer arrangement having a plurality of through openings and at least two parallel webs, a plurality of piezoelements and a terminating layer which has a plurality of slots comprises connecting second electrodes of the piezoelements to the terminal layer. Furthermore, the method comprises contacting first electrodes of the piezoelements by wire bonding, the first electrodes being arranged opposite the second electrodes. Furthermore, the method comprises connecting the slot ends of the terminating layer with the webs of the perforated plate carrier, which adjoin directly to the through openings, in particular by means of welds and the partial filling of the through openings with a damping material.
- the advantage here is that the sound transducer assembly is sealed.
- FIG. 1 shows a sound transducer arrangement according to the invention
- Figure 2 is a plan view of a first embodiment of
- Figure 3 is a plan view of a second embodiment of
- Figure 4 shows a process for the preparation of the inventive
- FIG. 1 shows a sectional view in the xz-plane of FIG
- the sound transducer arrangement 100 shows by way of example three sound transducer elements or bending transducer elements 115, which are arranged parallel to each other at a distance from each other.
- 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 has an upper side and a lower side, which are arranged opposite one another. On the top are
- Webs 102 arranged, which are arranged parallel to each other. These webs 102 have a minimum distance from each other, wherein the minimum distance corresponds to the size of the passage opening 111. This means that the webs 102 directly adjoin the passage openings 111.
- the piezo elements 104 are disposed within the through holes 111, each of them
- Through hole 111 each receives a piezoelectric element 104, which is introduced from the top into the through hole 111 and flush with the top.
- the piezo elements 104 have smaller dimensions than the through openings 111.
- the cap layer 103 has slots spaced parallel to each other and connected by the first connection regions 108. This means that in rectangular slots, the membrane is rectangular. In arcuate slots, the membrane is designed wave-shaped.
- Each piezo element 104 has a first electrode 105 and a second one
- Electrode 106 The first electrode 105 is connected by means of a wire connection 112, for example, to an amplifier circuit and functions as
- the second electrode 106 is electrically conductively connected by means of an adhesive layer 107 to the terminating layer 103.
- the termination layer 103 is connected to an electrical ground, for example the amplifier circuit ground. That is, the second electrode 105 is grounded, thereby performing EMC shielding.
- 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 webs 102 of the perforated plate carrier 101, which adjoins the through-opening 111 directly.
- the first connection portions 103 are spaced parallel to the
- further webs 117 are arranged laterally spaced apart, ie at least one further web 117. This means that further webs 117 extend parallel to the webs 102.
- the webs 102 and the other webs 117 are formed by recesses 116 in the top of
- the recesses 116 have a distance of 0.1 mm - 1 mm to the welds of the first connecting portions 108.
- the lateral distance between the webs 102 and the other webs is 0.1 mm - 2 mm.
- the depth of the recesses 116 comprises at least 0.1 mm.
- second connection regions 109 are arranged laterally spaced apart. The distance is formed by the recess 116 between the webs 102 and 117.
- Connection regions 109 are arranged on the further webs 117 and also comprise weld seams.
- connection regions 109 are arranged on the further webs 117 and also comprise weld seams.
- Connection regions 109 other connection areas may be present, which also have welds.
- the number of connecting regions corresponds to the number of webs that run parallel to the through holes 111.
- a plurality of webs 117 and a plurality of recesses 116 are arranged laterally next to each other around the through-openings 111 alternately. This serves for improved decoupling between two sound transducer elements.
- the recesses 102 may be filled, for example, with a silicone-containing damping material.
- the piezoelectric elements 104 have a thickness of 100 ⁇ - 750 ⁇ , of 150 ⁇ - 500 ⁇ .
- the perforated plate carrier 101 has a thickness of 0.5 mm - 15 mm, preferably 1 mm - 10 mm.
- FIG. 2 shows a plan view of the first embodiment of the terminating layer 203.
- three bending transducer elements are shown, which are arranged parallel or in a line to each other.
- the plan view is the rectangular
- Finishing layer 203 which covers the three piezoelectric elements 204. Furthermore, the first connection region 208, which is the edge stress of the respective bending transducer sets and the second connection region 209, which serves as a decoupling between the bending transducers represented. Slots 213 are arranged at right angles to the first connection regions 208. The slots 213 are mechanically connected to the first connection areas. That is, the slots 213 and the first connection portions 208 form the diaphragm of the respective flexural transducer element.
- the piezoelectric elements are designed rectangular or square.
- FIG. 3 shows a plan view of the second embodiment of the terminating layer 303.
- FIG. 3 shows a plan view of the second embodiment of the terminating layer 303.
- the slots are arcuate designed and the piezo elements 304 are round
- FIG. 4 shows the method for producing a sound transducer arrangement, which has a perforated plate carrier with a plurality of through openings, at least two parallel webs, a plurality of piezo elements and a terminating layer.
- the method 400 starts with a step 410, in which 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. In this case, the first electrode is opposite to the second electrode.
- the slot ends of the end layer and the webs immediately adjacent to the through openings are connected by means of first connection regions, for example with welds.
- the passage openings are at least partially with a
- Filling material is filled, especially from the side, by the
- a plastic film is adhered to the topcoat.
- the sound transducer assembly 100 is used in motor vehicles, moving or stationary machines, such as robots, driverless transport systems,
- the acoustic transducer assembly 100 can be used in e-bikes, electric wheelchairs, and assistive devices to assist physically disabled persons.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015224773.2A DE102015224773A1 (de) | 2015-12-10 | 2015-12-10 | Schallwandleranordnung mit zwei parallel angeordneten Stegen und Verfahren zur Herstellung einer Schallwandleranordnung mit zwei parallel angeordneten Stegen |
PCT/EP2016/076078 WO2017097496A1 (de) | 2015-12-10 | 2016-10-28 | Schallwandleranordnung mit zwei parallel angeordneten stegen und verfahren zur herstellung einer schallwandleranordnung mit zwei parallel angeordneten stegen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3386650A1 true EP3386650A1 (de) | 2018-10-17 |
EP3386650B1 EP3386650B1 (de) | 2021-04-14 |
Family
ID=57218891
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16788685.2A Active EP3386650B1 (de) | 2015-12-10 | 2016-10-28 | Schallwandleranordnung mit zwei parallel angeordneten stegen und verfahren zur herstellung einer schallwandleranordnung mit zwei parallel angeordneten stegen |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3386650B1 (de) |
CN (1) | CN108367315B (de) |
DE (1) | DE102015224773A1 (de) |
WO (1) | WO2017097496A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102022124937A1 (de) | 2022-09-28 | 2024-03-28 | Valeo Schalter Und Sensoren Gmbh | Ultraschallsensor für ein kraftfahrzeug, kraftfahrzeug und herstellungsverfahren für einen ultraschallsensor |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4754440A (en) * | 1985-12-27 | 1988-06-28 | Aisin Seiki Kabushikikaisha | Ultrasonic transducer |
DE3920872A1 (de) | 1989-06-26 | 1991-01-03 | Siemens Ag | Verfahren zur herstellung von ultraschall-wandlern, insbesondere von schichtwandlern, die ausser piezoelektrischem material auch kunststoffmaterial umfassen |
US20050075572A1 (en) | 2003-10-01 | 2005-04-07 | Mills David M. | Focusing micromachined ultrasonic transducer arrays and related methods of manufacture |
JP2008191007A (ja) * | 2007-02-05 | 2008-08-21 | Denso Corp | センサ装置の取り付け構造 |
DE102014207681A1 (de) * | 2014-04-24 | 2015-10-29 | Robert Bosch Gmbh | Membran für einen Ultraschallwandler und Ultraschallwandler |
-
2015
- 2015-12-10 DE DE102015224773.2A patent/DE102015224773A1/de not_active Withdrawn
-
2016
- 2016-10-28 EP EP16788685.2A patent/EP3386650B1/de active Active
- 2016-10-28 CN CN201680072526.8A patent/CN108367315B/zh active Active
- 2016-10-28 WO PCT/EP2016/076078 patent/WO2017097496A1/de unknown
Also Published As
Publication number | Publication date |
---|---|
CN108367315B (zh) | 2020-09-25 |
DE102015224773A1 (de) | 2017-06-14 |
CN108367315A (zh) | 2018-08-03 |
EP3386650B1 (de) | 2021-04-14 |
WO2017097496A1 (de) | 2017-06-15 |
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