EP3600698A1 - Sound transducer, comprising a piezoceramic transducer element which is integrated in a diaphragm that can vibrate - Google Patents
Sound transducer, comprising a piezoceramic transducer element which is integrated in a diaphragm that can vibrateInfo
- Publication number
- EP3600698A1 EP3600698A1 EP18713224.6A EP18713224A EP3600698A1 EP 3600698 A1 EP3600698 A1 EP 3600698A1 EP 18713224 A EP18713224 A EP 18713224A EP 3600698 A1 EP3600698 A1 EP 3600698A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- transducer
- transducer element
- membrane
- sound
- sound 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.)
- Withdrawn
Links
- 239000004033 plastic Substances 0.000 claims abstract description 27
- 229920003023 plastic Polymers 0.000 claims abstract description 27
- 125000000524 functional group Chemical group 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000012790 adhesive layer Substances 0.000 claims abstract description 6
- 239000012528 membrane Substances 0.000 claims description 55
- 230000003534 oscillatory effect Effects 0.000 claims description 13
- 239000004020 conductor Substances 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 7
- 230000005855 radiation Effects 0.000 claims description 2
- 238000002604 ultrasonography Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000002033 PVDF binder Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 238000001721 transfer moulding Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
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- 230000005236 sound signal Effects 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000009736 wetting Methods 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
- B06B1/0644—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 a single piezoelectric element
- B06B1/0662—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 a single piezoelectric element with an electrode on the sensitive surface
- B06B1/0666—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 a single piezoelectric element with an electrode on the sensitive surface used as a diaphragm
-
- 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
- B06B1/0644—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 a single piezoelectric element
- B06B1/0651—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 a single piezoelectric element of circular shape
-
- 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
- B06B1/0611—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 in a pile
-
- 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
- B06B1/0644—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 a single piezoelectric element
- B06B1/0655—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 a single piezoelectric element of cylindrical shape
-
- 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
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/01—Manufacture or treatment
- H10N30/02—Forming enclosures or casings
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/88—Mounts; Supports; Enclosures; Casings
Definitions
- the invention relates to a sound transducer comprising a diaphragm pot, a transducer element and a housing, wherein the diaphragm pot has a membrane and a wall.
- Ultrasonic sensors are used inter alia in automotive and
- Objects in the environment can be detected by emitting an ultrasonic signal through the ultrasonic sensor and reflecting it from an object
- Emission of the ultrasonic signal and receiving the ultrasonic echo and the known speed of sound can then be calculated the distance to the object.
- the ultrasonic sensors typically include a sound transducer having a diaphragm, a transducer element, and a housing.
- Transducer element is, for example, a piezoceramic
- Membrane bottom is usually carried out by an adhesive process. This is prone to failure both in the manufacturing process and in operation.
- the functional group of the ultrasonic sensor and the housing are manufactured as separate individual parts and then joined.
- a sound transducer which has a resonator with at least one piezoelectric element.
- the resonator is integrally formed as a diaphragm pot with a membrane and a circumferential surface of the same material.
- the diaphragm pot is for example made of a polymer material such as polyvinylidene fluoride (PVDF) or a
- piezoceramic material produced.
- One or more regions of the membrane are polarized, so that piezoelectrically active regions are formed.
- the invention is based on the object, a
- a surge transducer in particular for
- the sound transducer has a functional group, wherein the functional group has a diaphragm pot and at least one electroacoustic
- Transducer element comprises.
- the sound transducer has a housing (5).
- the diaphragm pot comprises a vibratable membrane and a circumferential wall and at least one electroacoustic transducer element, wherein the transducer element is designed to excite the membrane to oscillate and / or to convert vibrations of the membrane into electrical signals.
- the diaphragm cup is formed of a plastic material, wherein according to the invention the at least one transducer element, in particular without additional adhesive layer, is integrated into the oscillatable diaphragm, wherein the transducer element is designed as a piezoceramic element.
- the transducer element has on one or more surfaces electrodes for contacting and control. These can be considered electrically conductive
- a transducer element integrated into the oscillatable membrane should be understood to mean that the transducer element initially exists as a separate component which is connected to the oscillating diaphragm during formation of the oscillatory diaphragm, for example by an injection molding method or a resin transfer molding method in that the plastic material of the membrane at least partially surrounds the transducer element.
- thermoset a thermoplastic
- thermoplastic a thermoplastic
- Particularly suitable as plastic materials are epoxy resins.
- the thus formed sensor can be both for receiving and for transmitting sound, in particular
- Ultrasound to be used.
- the design of a particular desired waveform and frequency can be achieved by geometric design in the membrane.
- regions of the membrane with different thickness or material thickness can be formed.
- Usual operating frequencies are in the range between 20 and 250 kHz, frequencies in the range of 30 to 80 kHz are particularly well suited.
- the oscillatory membrane may have areas of reduced thickness and / or areas of increased thickness.
- the membrane preferably has a thickness or material thickness in the range from 0.15 mm to 5 mm, particularly preferably from 0.2 to 1 mm.
- Transducers designed according to the invention can thus be used advantageously in sensors for distance determination, e.g. find by means of air ultrasound. A use for distance determination in liquids is also conceivable. Due to the one-piece design and the resulting robustness against environmental influences inventively designed sound transducer are particularly suitable for use in the automobile.
- the housing and the functional group of the sound transducer are integrally formed or as a component.
- An inventively designed transducer can be used for electrical
- the conductors e.g. be electrically connected by means of a plug connection with a trained for generating and / or evaluation of the signals control unit.
- Transducer element is disc-shaped and has a first surface and a first surface opposite the second surface.
- the transducer element is integrated into the membrane in such a way that the second surface is exposed in the direction of the interior of the diaphragm pot.
- This embodiment has the advantage that, as a result of the second surface of the transducer element exposed to the inside, it can be electrically contacted in a simple manner. At least one electrical conductor in this embodiment can be contacted directly on the exposed second surface.
- the piezoceramic element in this embodiment is preferably formed such that both electrodes from the same side, i. the same
- the electrode is carried out over its entire surface on the first surface connected to the membrane and guided over the edge of the piezoceramic element to the second surface, where it forms a contact surface.
- At least one transducer element is disk-shaped and has a first surface and a second surface opposite the first surface.
- the transducer element is preferably integrated into the membrane in such a way that the first surface is exposed in the emission direction of the diaphragm pot.
- Radiating direction is understood to be that direction perpendicular to the extension of the membrane, in which a sound signal is preferably emitted when the membrane is excited to mechanical vibrations.
- This arrangement of the transducer element has the advantage of a direct coupling of the piezoelectric element to the surrounding fluid. This is an advantage especially for fluids with high density.
- the contacting can be done in this embodiment by order contact on an opposite second surface.
- the method comprises, in particular, the following steps: a) at least one element designed as a piezoceramic element
- Transducer element is introduced into a cavity of a plastic processing tool, b) a plastic material is injected into the cavity, wherein the transducer element is at least partially enclosed by the plastic material, whereby a diaphragm pot is formed with a vibratable membrane and a wall, wherein the at least one traveling element in the oscillatory membrane is integrated.
- Plastic processing tool is introduced.
- the piezoceramic element is first introduced into the cavity and then the plastic material is injected.
- the electrical contacting of the piezoceramic element can in particular prior to introduction into the cavity of the
- Plastic processing tool done, for example by means of soldering, bonding or thermo-compression welding of pins, wires or other electrical conductors.
- the electrical contacts are doing by suitable Sealing measures protected from wetting with plastic to allow subsequent electrical connections.
- the manufacturing method according to the invention enables the simple and economical production of a swirl converter, e.g. for one
- piezoceramic elements as transducer elements.
- an error-prone adhesive connection for coupling an electro-acoustic or electro-mechanical transducer element can be dispensed with during manufacture, resulting in a simplified build-up process. Since that
- Plastic material in the liquid state wets the piezoceramic element and then cured, results in a reliable adhesion between the plastic material and the piezoceramic element that the
- Transducer element of the transducer thus produced represents. This reliable adhesion leads to a high reproducibility of the
- vibration mechanical properties of the transducer since no e.g. In their adhesive layer thickness, adhesive properties or the course of the adhesive layer by applying an adhesive partner tolerance-sensitive adhesive layers are necessary, the robustness and reproducibility of the vibration mechanical properties of the transducer is further increased.
- Plastic processing tool designed such that in step b) the functional group is integrally formed with a housing of the sound transducer. Due to the one-piece, in particular, the advantages that the finished component increased resistance to environmental influences such. B. has the ingress of moisture or dirt, and also reduce the number of components of the transducer and the number of required steps for assembling the transducer.
- FIG. 1 a shows schematically a sound transducer according to a first embodiment of the invention.
- FIG. 1 b) shows an enlarged view of the functional group of the sound transducer according to FIG. 1 a).
- Figure 2 shows schematically a functional group of a sound transducer according to a second embodiment of the invention.
- Figure 3 a shows schematically a sound transducer according to a third embodiment of the invention.
- FIG. 3 b shows an enlarged view of the functional group of the sound transducer according to FIG. 3 a).
- Figure 4 shows schematically a sound transducer according to a fourth embodiment of the invention.
- Figures 5 a) -c) show enlarged views of a possible embodiment of a transducer element for a sound transducer according to one of the embodiments of the invention shown in Figures 1-4.
- FIG. 6 shows schematically a flow diagram of a possible embodiment of a method according to the invention
- FIG. 1 a schematically shows a section through a surge transducer 1 according to a first embodiment of the invention.
- the sound transducer has a housing 5 with a connector housing 11.
- the surge transducer comprises a functional group 2, which is integral with the housing.
- the functional group comprises a diaphragm pot 6 with a
- the Membrane 8 may be formed, for example, circular or elliptical.
- the membrane has areas 4 with a reduced wall thickness. Due to the geometric design of these areas, the vibration behavior and the resonant frequency of the transducer are determined.
- the diaphragm pot 6 is made in one piece in this example. Continues the circulating
- the sound transducer 1 furthermore has a transducer element 3, which according to the invention is designed as a piezoceramic element and is integrated into the oscillatory membrane 8.
- the functional group 2 of the transducer 1 according to the first embodiment is shown enlarged.
- the transducer element 3 is formed in this example as a disc having a first surface 15, a first surface opposite the second surface 13 and a circumferential side surface 14.
- the transducer element 3 is integrated into the membrane such that the second surface 13 in the direction of the interior 16 of the diaphragm pot 6 is exposed.
- the transducer element is integrated into the membrane 8 such that both the first surface 15 and the side surface 14 of the
- Transducer element 3 are completely enclosed by the plastic material of the membrane 8, such that the second surface 13 flush with the
- Transducer element 3 is formed in this embodiment such that both electrodes are from the same side, i. the same surface, can be contacted electrically.
- FIG. 5 a) shows the transducer element 3 in plan view of the first surface 15.
- FIG. 5 b) shows a section through the transducer element 3.
- FIG. 5 c) shows the transducer element 3 formed as a piezoceramic element in plan view onto the second surface 13.
- the first surface 15 of the transducer element 3 is covered with an electrode layer 25 which extends over the whole area in this example.
- the transducer element 3 has a UmWallet réelle 25 'on the side surface 14 by means of which the first electrode 25 via the edge of the piezoceramic element on the second surface 13 is guided, where it forms a contact surface 25 ".
- a second electrode 23 is formed on the second surface 13.
- electrical conductors 18 for driving the transducer element 3 for example by soldering or bonding.
- FIG. 2 shows the functional group 2 of a sound transducer 1 according to a second embodiment of the invention is shown enlarged.
- Transducer element 3 is formed in this example as a disc, with a first surface 15 and one of the first surface opposite, second
- the transducer element 3 is integrated into the membrane in such a way that the first surface 15 is exposed in the emission direction 17 of the sound transducer 1.
- the electrodes for contacting the transducer element can in this case be formed in the same or an equivalent manner as illustrated in connection with FIG.
- the electrical conductors, e.g. Wires or pins may for example be passed through the plastic material of the membrane 8.
- FIG. 3 a schematically shows a section through a surge transducer 1 according to a third embodiment of the invention.
- the sound transducer in turn has a housing 5 with a connector housing 11.
- Schwallwandler comprises a functional group 2, which is integral with the
- the functional group comprises a diaphragm pot 6 with a vibratable membrane 8 and a circumferential wall 7.
- the sound transducer 1 further comprises a transducer element 3, the
- According to the invention is designed as a piezoceramic element and is integrated into the oscillatory membrane 8.
- the functional group 2 of the transducer 1 according to the third embodiment is shown enlarged.
- the transducer element 3 is also formed in this example as a disc having a first surface 15, a first surface opposite the second surface 13 and a circumferential side surface 14.
- the transducer element 3 is integrated into the membrane such that the second surface 13 in the direction of the interior 16 of the
- piezoceramic element is easier to place in the cavity and fix. Furthermore, this arrangement results in an increased distance of the transducer element to the neutral fiber (zero line)).
- FIG. 4 schematically shows a section through a surge transducer 1 according to an exemplary fourth embodiment of the invention.
- the structure of the sound transducer 1 according to the fourth embodiment of the invention substantially corresponds to the structure of that described in connection with Figure 3
- regions 4 'of the membrane have an increased thickness (material accumulation). Due to the configuration of the regions 4 ', the resonance frequency of the sound transducer and the directional characteristic of the sound transducer can be adjusted.
- the regions 4 ' can be arranged uniformly (symmetrically) or unevenly (asymmetrically).
- FIG. 6 illustrates the sequence of a production method according to the invention for a functional group of a sound transducer according to the invention.
- a plastic processing tool is provided with a cavity whose shape is adapted to the desired shape of the sound transducer.
- a piezoceramic element which is provided as a transducer element, is introduced into the cavity.
- electrical conductors can already be provided which contact the electrodes of the piezoceramic element.
- step 300 a plastic material, for example an epoxy resin, is injected into the cavity, whereby at least the functional group of the
- Sound transducer is formed and whereby the piezoceramic element is at least partially enclosed by the plastic material. If the cavity is designed accordingly not only the functional group of the Schallwandlers, but also the housing are formed in a component.
- step 400 if appropriate after a solidification period, the functional group or the component comprising the functional group and the housing of the sound transducer is removed.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017205375.5A DE102017205375A1 (en) | 2017-03-30 | 2017-03-30 | transducer |
PCT/EP2018/057486 WO2018177945A1 (en) | 2017-03-30 | 2018-03-23 | Sound transducer, comprising a piezoceramic transducer element which is integrated in a diaphragm that can vibrate |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3600698A1 true EP3600698A1 (en) | 2020-02-05 |
Family
ID=61768323
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18713224.6A Withdrawn EP3600698A1 (en) | 2017-03-30 | 2018-03-23 | Sound transducer, comprising a piezoceramic transducer element which is integrated in a diaphragm that can vibrate |
Country Status (6)
Country | Link |
---|---|
US (1) | US11583896B2 (en) |
EP (1) | EP3600698A1 (en) |
JP (1) | JP6891293B2 (en) |
CN (1) | CN110475621B (en) |
DE (1) | DE102017205375A1 (en) |
WO (1) | WO2018177945A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019116080A1 (en) * | 2019-06-13 | 2020-12-17 | USound GmbH | MEMS sound transducer with a membrane made of polymer |
DE102020204255A1 (en) * | 2020-04-01 | 2021-10-07 | Robert Bosch Gesellschaft mit beschränkter Haftung | Membrane pot |
DE102020206431A1 (en) * | 2020-05-25 | 2021-11-25 | Robert Bosch Gesellschaft mit beschränkter Haftung | Membrane pot |
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JP6297204B2 (en) * | 2015-03-12 | 2018-03-20 | 富士フイルム株式会社 | Polymer composite piezoelectric material, electroacoustic conversion film, and electroacoustic transducer |
DE102015106044A1 (en) | 2015-04-21 | 2016-10-27 | Valeo Schalter Und Sensoren Gmbh | Ultrasonic sensor for a motor vehicle made of highly filled plastic, driver assistance system, motor vehicle and method |
JP2016214177A (en) | 2015-05-22 | 2016-12-22 | 陣内金型工業株式会社 | Container for plant cultivation |
DE102015110939B4 (en) * | 2015-07-07 | 2019-02-14 | Valeo Schalter Und Sensoren Gmbh | Ultrasonic sensor for a motor vehicle, motor vehicle and method for producing an ultrasonic sensor |
-
2017
- 2017-03-30 DE DE102017205375.5A patent/DE102017205375A1/en active Pending
-
2018
- 2018-03-23 US US16/497,933 patent/US11583896B2/en active Active
- 2018-03-23 CN CN201880023317.3A patent/CN110475621B/en active Active
- 2018-03-23 JP JP2019552621A patent/JP6891293B2/en active Active
- 2018-03-23 WO PCT/EP2018/057486 patent/WO2018177945A1/en unknown
- 2018-03-23 EP EP18713224.6A patent/EP3600698A1/en not_active Withdrawn
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WO2018177945A1 (en) | 2018-10-04 |
JP2020511906A (en) | 2020-04-16 |
JP6891293B2 (en) | 2021-06-18 |
DE102017205375A1 (en) | 2018-10-04 |
US11583896B2 (en) | 2023-02-21 |
CN110475621B (en) | 2022-02-11 |
US20210101179A1 (en) | 2021-04-08 |
CN110475621A (en) | 2019-11-19 |
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