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
  • G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
  • G10K9/22—Mountings; Casings
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
  • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
  • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
  • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
  • G01S15/88—Sonar systems specially adapted for specific applications
  • G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
  • G01S15/931—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
  • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
  • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
  • G01S7/521—Constructional features
• • 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
  • G10K11/002—Devices for damping, suppressing, obstructing or conducting sound in acoustic devices
• • 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
  • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
• • 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
  • G01—MEASURING; TESTING
  • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
  • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
  • G01S15/88—Sonar systems specially adapted for specific applications
  • G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
  • G01S15/931—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles
  • G01S2015/937—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles sensor installation details
  • G01S2015/938—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles sensor installation details in the bumper area

Definitions

• the invention relates to a sound transducer, which has a diaphragm pot, a transducer element and a housing.
• the diaphragm pot has a
• the sound transducer has a
• the invention relates to a method for producing the sound transducer.
• 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.
• Decoupling elements mounted between ultrasonic sensor and installation environment are made of flexible materials with high material damping, such as silicone.
• this can be called the document DE 10 2015 115 419 AI, in which a decoupling element is plugged in the form of a rubber ring on the diaphragm pot and thus centered the diaphragm pot on the one hand in the installed position and on the other hand decoupled vibration mechanical of the outer lining part.
• the invention is based on the object, a
• Ultrasonic sensor proposed which housing, at least one
• Group in this case has a diaphragm pot and at least one electro-acoustic transducer element.
• the diaphragm pot comprises a vibratory
• the transducer element is designed to stimulate the membrane to vibrate and / or vibrations of the
• the diaphragm pot and at least a portion of the housing are formed of a plastic material.
• the decoupling element is designed to decouple the diaphragm pot and / or the at least one part of the housing in terms of vibration from an external environment of the sound transducer. A material which is good for this
• Has damping properties for example, is silicone.
• the external environment of the sound transducer is in particular a
• Ultrasonic sensors usually installed in recesses on the bumper.
• the at least one decoupling element is integrated in particular in the wall of the diaphragm pot.
• the at least one decoupling element is integrated in the at least one part of the housing.
• the structure of the transducer is substantially simplified compared to conventionally manufactured sound transducers whose components are mounted individually.
• the sound transducer also gains robustness against environmental influences.
• the at least one part of the housing and the functional group of the sound transducer in one piece or as a component of the
• materials with very good suitability carbon, glass or aramid fiber can be reinforced
• Epoxy resins are used. Due to the integral formation of the at least one part of the housing, the functional group of the
• the at least one decoupling element is arranged between the external environment of the sound transducer and the diaphragm pot and / or the at least one part of the housing.
• the external environment of the sound transducer is in particular the installation environment of the sound transducer.
• the wall of the diaphragm pot is often directly on the
• the at least one part of the housing is in particular the part of the housing which directly adjoins the housing
• the decoupling element disposed in the space can particularly effectively prevent the transfer of vibrations between the at least one part of the housing and the installation environment.
• the decoupling element has at least one recess.
• the recess is a hole recess of the decoupling element.
• the diaphragm pot and / or the at least one part of the housing has in this case a
• Plastic bolt which passes through the hole recess and thus positively protects the decoupling element against radial displacement.
• a cohesive connection so that the decoupling element can not solve axially.
• This provides a simple way to place the decoupling element in the Membrantopf, in particular in the wall of the diaphragm pot and / or the at least part of the housing to integrate.
• this form-fitting and cohesive connection between the at least one decoupling element and the diaphragm pot and / or the at least one part of the housing is designed to be non-detachable. This results in a more robust construction of the sound transducer compared to eg a conventional sound transducer, in which the decoupling element releasably to the corresponding
• the recess of the decoupling element can also be an undercut of the
• the decoupling element is at least partially in the
• the encircling decoupling element has, for example, a partial region which has a greater wall thickness than the remaining region of the decoupling element. The part with the thicker wall thickness is completely enclosed by the plastic material, so that a
• the at least one decoupling element adheres to the
• Plastic material in particular a thermosetting plastic, the functional group of the sound transducer such that the
• Decoupling element with the at least one part of the housing and / or with the wall of the diaphragm pot is materially connected.
• Plastic material can be used here, for example, epoxy resin. This cohesive connection between diaphragm pot and
• Decoupling element and / or the at least part of the housing and the decoupling element can be realized when the Decoupling element is wetted during the manufacturing process by the plastic material.
• a thermoset material is preferably used as the plastic material. Due to the adhesive properties of the material, there is a non-detachable cohesive connection between the diaphragm pot and / or housing with the at least one decoupling element. This cohesive connection is comparable to an adhesive bond, but no adhesive is used, but the adhesive material property of the base material is used for the connection. It should be noted here that the adhesive properties of the material of the housing and / or the wall of the diaphragm pot with the adhesive properties of the material of the decoupling element are coordinated to achieve a durable durable cohesive connection.
• Decoupling element can be combined with the cohesive variants.
• the manufacturing method according to the invention enables the simple and economical production of a swirl converter, e.g. for one
• Ultrasonic sensor based on at least one decoupling element integrated in the diaphragm cup.
• labor-intensive assembly steps for coupling the decoupling element to the diaphragm pot can be dispensed with during manufacture, which results in a simplified process
• the at least one decoupling element is first introduced into a first cavity of a tool of an injection molding machine. Subsequently, the injection of a plastic material into the first cavity, wherein the decoupling element is at least partially applied to the plastic material. Alternatively or additionally, the decoupling element is at least partially filled by the injected plastic material. Further alternatively or additionally, the decoupling element is at least partially enclosed by the plastic material, so that it is at least partially embedded in the plastic material after curing of the plastic material.
• the result is a diaphragm pot according to the main claim with a wall, with a vibrating membrane and with a decoupling element.
• Decoupling element is in the diaphragm pot, in particular in the wall of the Integrated membrane pot.
• the plastic material is not injected, but preferably poured into a mold.
• Housing be manufactured as a one-piece overall component in one step.
• the structure of the transducer is thus further simplified and made more robust.
• at least one electroacoustic transducer element is preferably introduced into a second cavity of the tool of the injection molding machine.
• the plastic material is injected into the second cavity, so that the at least one transducer element is at least partially enclosed by the plastic material and the transducer element in the
• Figure 1 shows schematically a sound transducer after a first
• Embodiment of the invention with a connector housing.
• Figure 2 shows schematically a sound transducer after a second
• Embodiment of the invention with a connector housing.
• FIG. 3 shows schematically a sound transducer after a third one
• FIG. 4 shows schematically a sound transducer according to a fourth embodiment
• FIG. 5 shows schematically a sound transducer according to a fifth embodiment
• FIG. 6 shows schematically a sound transducer after a sixth
• FIG. 7 shows schematically a flow chart of a possible embodiment of a method according to the invention for producing a surge converter.
• FIG. 1 schematically shows a section through a surge transducer 1 according to a first embodiment of the invention.
• the sound transducer has a
• the surge transducer comprises a functional group 2, which is integral with the housing.
• the functional group comprises a diaphragm pot 6 with a vibratory membrane 8 and a peripheral wall 7.
• the membrane 8 can be
• the membrane has portions with a reduced thickness or a reduced wall thickness.
• the geometric design of these areas will be the
• the diaphragm pot 6 is made in one piece in this example.
• the sound transducer 1 further comprises a transducer element 3, which is integrated in the membrane 8 in this example.
• the decoupling element 9a is materially connected to the wall 7 of the diaphragm pot 6 and thus integrated into the wall of the diaphragm pot 7. The decoupling element 9a adheres to the outside of the wall 7 in this example.
• the surge transducer 1 is installed in a component 12a in this first embodiment.
• the component 12a may represent, for example, a bumper of a vehicle.
• the decoupling element 9a can be prevented that vibrations from the diaphragm pot 6 can be transmitted to the component and vice versa.
• FIG. 2 shows a decoupling element 9b, which is materially integrated both in the wall 7 of the diaphragm pot 6 and in a part of the housing 5.
• the decoupling element 9b can be prevented that vibrations from the diaphragm pot 6 or the part of the Housing 5 can be transferred to the external environment of the transducer and vice versa.
• FIG. 3 shows an embodiment in which the
• Decoupling element 9c is embedded on one side in the diaphragm pot 7.
• the decoupling element bears against the peripheral edge 13 and is better protected against slipping by introduced shear forces.
• FIG. 4 shows a fourth embodiment of the invention
• the decoupling element 9d is at least partially embedded in the diaphragm pot 6 such that the at least one
• Decoupling element 9d is positively connected to the diaphragm pot 6.
• the circulating decoupling element 9d in this case has a partial region 14 which has a thicker wall thickness than the remaining region of the
• FIG. 5 shows a fifth embodiment of the invention
• the circumferential decoupling element 9e has a recess 15 in the form of an undercut.
• the plastic material of the diaphragm pot 7 fills this undercut such that the
• Decoupling element 9e is positively connected to the diaphragm pot 7.
• FIG. 6 shows a sixth embodiment of the invention
• the decoupling element 9f has a recess 16 in the form of a hole recess.
• This recess 16 is of the
• Decoupling element 9f is positively connected to the diaphragm pot 7.
• the decoupling element in the fourth, fifth and sixth embodiments, it would also be conceivable for the decoupling element to be additionally connected in a materially bonded manner to the diaphragm pot, in particular to the wall of the diaphragm pot. Also a combination of different positive locking
• FIG. 5 illustrates the sequence of a production method according to the invention for a sound transducer according to the invention.
• step 100 a plastic processing tool having a first cavity is provided, the shape of which is adapted to the desired shape of the sound transducer.
• step 110 at least one decoupling element is introduced into the first cavity.
• a plastic material such as an epoxy resin
• a plastic material is injected into the first cavity, thereby forming a diaphragm cup having a wall, a vibratable diaphragm and a decoupling element.
• the at least one decoupling element is in this case integrated in the diaphragm pot, in particular in the wall of the diaphragm pot.
• the decoupling element lies at least partially on the
• the housing can also be formed in one component.
• step 140 optionally after a solidification time, the component is removed.
• At least one electroacoustic transducer element is introduced into a second cavity of the tool of the injection molding machine.
• the at least one transducer element is at least partially enclosed by the plastic material and integrated into the oscillatory membrane.

Landscapes

• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Acoustics & Sound (AREA)
• Multimedia (AREA)
• Radar, Positioning & Navigation (AREA)
• Remote Sensing (AREA)
• Computer Networks & Wireless Communication (AREA)
• General Physics & Mathematics (AREA)
• Mechanical Engineering (AREA)
• Injection Moulding Of Plastics Or The Like (AREA)
• Transducers For Ultrasonic Waves (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=63079909

Family Applications (1)

Country Status (6)

Families Citing this family (1)

Family Cites Families (13)

• 2017
  • 2017-09-25 DE DE102017216868.4A patent/DE102017216868A1/de active Pending
• 2018
  • 2018-07-30 JP JP2020517155A patent/JP6984009B2/ja active Active
  • 2018-07-30 US US16/645,245 patent/US20200294481A1/en not_active Abandoned
  • 2018-07-30 WO PCT/EP2018/070547 patent/WO2019057375A1/de unknown
  • 2018-07-30 CN CN201880062203.XA patent/CN111133502A/zh active Pending
  • 2018-07-30 EP EP18749336.6A patent/EP3688748A1/de not_active Withdrawn

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