EP4505215A1 - Ultraschallsensor für ein kraftfahrzeug - Google Patents
Ultraschallsensor für ein kraftfahrzeugInfo
- Publication number
- EP4505215A1 EP4505215A1 EP23712801.2A EP23712801A EP4505215A1 EP 4505215 A1 EP4505215 A1 EP 4505215A1 EP 23712801 A EP23712801 A EP 23712801A EP 4505215 A1 EP4505215 A1 EP 4505215A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- membrane
- housing
- casting compound
- ultrasonic sensor
- wall
- 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.)
- Pending
Links
Classifications
-
- 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
- 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
- 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
- G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
- G10K9/22—Mountings; Casings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2420/00—Indexing codes relating to the type of sensors based on the principle of their operation
- B60W2420/54—Audio sensitive means, e.g. ultrasound
Definitions
- the invention relates to an ultrasonic sensor for a motor vehicle with a sensor housing and with a cup-shaped membrane connected to the sensor housing, the membrane having a membrane base for emitting and/or receiving ultrasonic signals and a membrane wall adjoining the membrane base, and wherein a section of the membrane wall protrudes into the sensor housing.
- a first potting compound filling this housing interior is arranged in a housing interior of a housing section of the sensor housing facing the membrane base.
- Brake assistance systems are assigned and provide information about the surroundings of the motor vehicle, in particular about obstacles or objects in the surroundings and their distances from the motor vehicle.
- the ultrasonic sensors are distributed throughout the motor vehicle, at least in the front and rear areas of the motor vehicle, and are usually installed on trim parts, in particular on bumpers.
- Such an ultrasonic sensor is regularly arranged in a corresponding opening or recess in the trim part of the motor vehicle in such a way that a front or front membrane base of a cup-shaped membrane of the ultrasonic sensor is essentially flush with the outer surface of the trim part, with ultrasonic waves passing over the membrane base during operation can be sent and received.
- the ultrasonic sensor comprises a substantially cylindrical sensor housing and a cup-shaped membrane mounted on the sensor housing and having a disk-shaped membrane base has, a piezo element being arranged on the inside of the membrane base, which can cause the membrane base to vibrate so that it can generate ultrasonic signals.
- the membrane is surrounded radially on the outside by an annular decoupling element, which decouples the membrane from the sensor housing in terms of vibration, and which is mounted on the housing side on an annular housing section of the sensor housing, which surrounds a part of the decoupling element facing the sensor housing radially on the outside, the decoupling element and the housing section are connected to each other via locking means.
- a potting compound is also arranged in an interior of the sensor housing to protect the ultrasonic sensor and its electrical components from moisture and dirt.
- the present invention is based on the object of specifying an improved design for an ultrasonic sensor whose structure is simplified and which includes the smallest possible number of individual parts and joining steps in the manufacturing process.
- an ultrasonic sensor for a motor vehicle comprises a sensor housing and a cup-shaped membrane connected to the sensor housing, the membrane having a membrane base for emitting and/or receiving ultrasonic signals and a membrane wall adjoining the membrane base, a portion of the membrane wall protruding into the sensor housing , and where in a housing interior one of the A first potting compound filling the housing interior is arranged in the housing section of the sensor housing facing the membrane base.
- the first casting compound extends at least partially into the membrane interior of the membrane surrounded by the membrane wall, the membrane being positively connected to the sensor housing by the first casting compound.
- the membrane is already attached to the sensor housing by means of the first casting compound and fixed relative to the sensor housing.
- the first casting compound also creates a corresponding positive connection.
- the design according to the invention therefore has the overall advantage that an improved design for an ultrasonic sensor is provided, the construction and assembly of which is simplified.
- an outer diameter of the membrane wall is smaller than an inner diameter of the sensor housing.
- the membrane is advantageously formed in one piece with its membrane base and its membrane wall and is preferably made of aluminum.
- a positive connection is effected at least in an axial direction and in a radial direction.
- the positive connection therefore takes place at least in the axial and radial directions.
- a gap is formed in the housing interior between the outside of the membrane wall projecting into the sensor housing and the inside of the housing wall of the housing section, with the first casting compound being at least partially extends into the gap.
- the first casting compound is thus supported on the outside of the membrane wall and the inside of the housing wall.
- the first casting compound extends completely into the gap, so that the first casting compound completely fills the gap. This results in a reliable positive connection in this area, at least in the radial direction.
- an extension is provided which extends radially outwards and runs like a ring collar around the axial end of the membrane wall, in particular completely. This enables a particularly suitable positive connection.
- the approach preferably extends radially outwards perpendicular to the membrane wall.
- a groove corresponding to the extension of the membrane wall is provided in the first casting compound, the extension being arranged in the groove, whereby a positive connection is achieved at least in the axial and radial directions.
- the first casting compound here has a groove corresponding to the circumferential extension and for receiving the extension, with the first casting compound completely surrounding the extension in the assembled state.
- annular, elastic molded part is arranged in an axial section of the intermediate space facing the membrane base, the extension resting on the molded part and causing a positive connection in the axial direction.
- the positive connection is brought about by the first casting compound together with the elastic molded part.
- the first casting compound in the housing interior extends in the radial direction to the inside of the housing wall of the housing section, wherein the first casting compound in the membrane interior extends in the radial direction to the inside of the membrane wall.
- the first casting compound in the membrane interior extends in the axial direction to the inside of the membrane base.
- the first casting compound completely fills the interior of the membrane.
- the first casting compound serves in particular to dampen vibrations on the membrane base and/or on the membrane wall.
- the first casting compound is formed in one piece from a first material.
- the first material is formed from an elastomer, thermoplastic, thermoset or silicone material.
- the first casting compound in the membrane interior extends in the axial direction only along a section of the membrane wall facing away from the membrane base, with a second casting compound being arranged immediately adjacent to the first casting compound, which is located in the membrane interior in the axial direction from the first Casting compound extends to the inside of the membrane base and in the radial direction to the inside of the membrane wall.
- the first casting compound is formed from a first material and the second casting compound is formed from a second material that is different from the first material.
- the second casting compound serves in particular to dampen vibrations on the membrane base and/or a section of the membrane wall facing the membrane base.
- 1 a shows an exploded view of an ultrasonic sensor
- FIG. 1 b shows a cross section of the ultrasonic sensor according to FIG. 1 a
- 2a shows an exploded view of an ultrasonic sensor in an alternative embodiment
- FIG. 2b shows a cross section of the ultrasonic sensor according to FIG. 2a
- FIG. 3a shows an exploded view of an ultrasonic sensor in a further alternative embodiment
- FIG. 3b shows a cross section of the ultrasonic sensor according to FIG. 3a
- FIG. 4b shows a cross section of the ultrasonic sensor according to FIG. 4a
- FIG. 5a shows an exploded view of an ultrasonic sensor in a further alternative embodiment
- Fig. 5b shows a cross section of the ultrasonic sensor according to Fig. 5a.
- FIGS. 1a and 1b An exemplary embodiment of an ultrasonic sensor 1 is shown in different views in FIGS. 1a and 1b.
- Fig. 1a the ultrasonic sensor 1 is shown in an exploded view, in Fig. 1b in a cross section.
- the ultrasonic sensor 1 comprises a one-piece sensor housing 2 with a plurality of electrical contact pins 3 and a printed circuit board 4 arranged within the sensor housing 2 and connected to the contact pins 3.
- the ultrasonic sensor 1 further comprises a cup-shaped membrane 5 connected to the sensor housing 2, the membrane 5 having a membrane base 6 for sending and/or receiving ultrasonic signals and one to the Membrane base 6 has subsequent membrane wall 7, and a section of the membrane wall 7 protrudes into the sensor housing 2.
- a disk-shaped piezoceramic is arranged, which is electrically connected to the circuit board 4.
- the sensor housing 2 is closed by a cover 8.
- a first casting compound 10 which completely fills this housing interior is arranged, the first casting compound 10 being made in one piece from a first material, in particular from an elastomer, thermoplastic, thermoset or silicone material , is trained.
- the first potting compound 10 extends in the housing interior of the sensor housing 2 in the radial direction R up to the inside of the housing wall of the housing section 9 of the sensor housing 2.
- the first potting compound 10 also extends completely into a membrane wall projecting between the outside of the sensor housing 2 7 and the inside of the housing wall of the housing section 9 formed gap.
- the first casting compound 10 extends into the membrane interior of the membrane 5 surrounded by the membrane wall 7, the first casting compound 10 extending in the radial direction R to the inside of the membrane wall 7 and in the axial direction Z to the inside of the membrane base 6.
- the first casting compound 10 thus completely fills the interior of the membrane and causes vibration damping on the membrane base 6 and the membrane wall 7.
- an extension 11 which extends perpendicularly to the membrane wall 7 and radially outwards and runs completely around this axial end of the membrane wall 7 in a ring collar-like manner, which is in one in the first Potting compound 10 arranged, to the approach 11 corresponding groove engages, so that the first potting compound 10 completely surrounds the approach 11.
- Such a design and arrangement of the first casting compound 10 as a whole in the sensor housing 2 and the membrane interior of the membrane 5 and the membrane 5, in particular with its extension 11, results in a reliable positive connection in the axial direction Z and radial direction R, the first casting compound 10 thus, in addition to a sealing function, vibration damping on the membrane base 6 and the membrane wall 7 and a mechanical decoupling between the membrane 5 and the sensor housing 2, it also produces a corresponding positive connection and thus a reliable attachment of the membrane 5 to the sensor housing 2.
- FIGS. 2a and 2b An ultrasonic sensor 1 in an alternative embodiment is shown in different views in FIGS. 2a and 2b.
- Fig. 2a the ultrasonic sensor 1 is shown in an exploded view, in Fig. 2b in a cross section.
- the ultrasonic sensor 1 essentially corresponds to the ultrasonic sensor 1 shown in FIGS. 1 a to 1 b, with the ultrasonic sensor 1 here having a second casting compound 12 in addition to the first casting compound 10.
- the first casting compound 10 extends in the membrane interior in the axial direction Z only along a section of the membrane wall 7 facing away from the membrane base 6, the second casting compound 12 being arranged directly adjacent to the first casting compound 10.
- the second casting compound 12 extends in the membrane interior in the axial direction Z from the first casting compound 10 to the inside of the membrane base 6 and in the radial direction R to the inside of the membrane wall 7.
- the second casting compound 12 is made from one of the first Material of the first potting compound 10 different second material is formed.
- the second casting compound 12 serves in particular to dampen vibrations on the Membrane base 6 and on the section of the membrane wall 7 facing the membrane base 6.
- the second material that can be used here is a material that is particularly suitable for corresponding vibration damping.
- FIG. 3a and 3b show an ultrasonic sensor 1 in a further alternative embodiment in different views.
- the ultrasonic sensor 1 is shown in an exploded view, in Fig. 3b in a cross section.
- the ultrasonic sensor 1 essentially corresponds to the ultrasonic sensor 1 shown in FIGS. 1 a to 1 b, the ultrasonic sensor 1 here having an annular, elastic molded part 13 in addition to the first casting compound 10.
- the elastic molded part 13 is arranged in an axial section of the gap facing the membrane base 6 between the outside of the membrane wall 7 projecting into the sensor housing 2 and the inside of the housing wall of the housing section 9 of the sensor housing 2.
- the extension 11 formed on the membrane wall 7 rests on the molded part 13 and causes a positive connection in the axial direction Z. The positive connection is thus effected here by the first casting compound 10 together with the elastic molded part 13.
- FIG. 4a and 4b show an ultrasonic sensor 1 in a further alternative embodiment in different views.
- the ultrasonic sensor 1 is shown in an exploded view, in Fig. 4b in a cross section.
- the ultrasonic sensor 1 essentially corresponds to the ultrasonic sensor 1 shown in FIGS. 2a to 2b, with the ultrasonic sensor 1 here having an annular, elastic molded part 13 in addition to the first casting compound 10.
- the elastic molded part 13 is in turn in an axial section of the gap facing the membrane base 6 between the outside of the membrane wall 7 projecting into the sensor housing 2 and the inside the housing wall of the housing section 9 of the sensor housing 2 is arranged, the extension 11 formed on the membrane wall 7 resting on the molded part 13, whereby a positive connection is brought about in the axial direction Z.
- a positive connection is effected by the first casting compound 10 together with the elastic molded part 13.
- FIG. 5a and 5b show an ultrasonic sensor 1 in a further alternative embodiment in different views.
- the ultrasonic sensor 1 is shown in an exploded view, in Fig. 5b in a cross section.
- the ultrasonic sensor 1 essentially corresponds to the ultrasonic sensor 1 shown in FIGS. 1 a to 1 b, in which case the sensor housing 2 is designed to be hollow cylindrical in the axial end section facing the membrane base 6, and a front cap 14 is connected to this axial end section via a snap connection the sensor housing 2 is connected.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022203361.2A DE102022203361A1 (de) | 2022-04-05 | 2022-04-05 | Ultraschallsensor für ein Kraftfahrzeug |
| PCT/DE2023/200059 WO2023193851A1 (de) | 2022-04-05 | 2023-03-15 | Ultraschallsensor für ein kraftfahrzeug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4505215A1 true EP4505215A1 (de) | 2025-02-12 |
Family
ID=85726970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23712801.2A Pending EP4505215A1 (de) | 2022-04-05 | 2023-03-15 | Ultraschallsensor für ein kraftfahrzeug |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20250244457A1 (de) |
| EP (1) | EP4505215A1 (de) |
| JP (1) | JP2025507139A (de) |
| KR (1) | KR20240152383A (de) |
| CN (1) | CN119096164A (de) |
| DE (1) | DE102022203361A1 (de) |
| WO (1) | WO2023193851A1 (de) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0749915Y2 (ja) * | 1986-01-31 | 1995-11-13 | 株式会社村田製作所 | 超音波トランスデユ−サ |
| JPS63255681A (ja) * | 1987-04-13 | 1988-10-21 | Matsushita Electric Works Ltd | 超音波振動子 |
| JPH08237796A (ja) * | 1995-02-27 | 1996-09-13 | Murata Mfg Co Ltd | 超音波送受波器 |
| DE10156259A1 (de) * | 2001-11-09 | 2003-05-22 | Valeo Schalter & Sensoren Gmbh | Ultraschallsensor und Verfahren zur Herstellung eines Ultraschallsensors |
| DE102006028214A1 (de) | 2006-06-14 | 2007-12-20 | Valeo Schalter Und Sensoren Gmbh | Ultraschallsensor, insbesondere Kraftfahrzeug-Ultraschallsensor |
| DE102006050037A1 (de) * | 2006-10-24 | 2008-04-30 | Robert Bosch Gmbh | Ultraschallwandler |
| ITMO20110053A1 (it) * | 2011-03-07 | 2012-09-08 | Meta System Spa | Procedimento per la realizzazione di un dispositivo sensore, in particolare di un dispositivo sensore impiegabile in sistemi di assistenza al parcheggio per veicoli |
| DE102013211409A1 (de) * | 2013-06-18 | 2014-12-18 | Robert Bosch Gmbh | Abstandssensor für ein Kraftfahrzeug und Anordnung mehrerer Abstandssensoren |
| CN104678377A (zh) * | 2013-11-27 | 2015-06-03 | 法雷奥汽车内部控制(深圳)有限公司 | 超声波传感器及其制造方法 |
| DE102013022063A1 (de) * | 2013-12-23 | 2015-06-25 | Valeo Schalter Und Sensoren Gmbh | Verfahren zum Herstellen eines Ultraschallsensors für ein Kraftfahrzeug |
-
2022
- 2022-04-05 DE DE102022203361.2A patent/DE102022203361A1/de active Pending
-
2023
- 2023-03-15 US US18/854,811 patent/US20250244457A1/en active Pending
- 2023-03-15 JP JP2024553699A patent/JP2025507139A/ja active Pending
- 2023-03-15 EP EP23712801.2A patent/EP4505215A1/de active Pending
- 2023-03-15 KR KR1020247031707A patent/KR20240152383A/ko active Pending
- 2023-03-15 CN CN202380031908.6A patent/CN119096164A/zh active Pending
- 2023-03-15 WO PCT/DE2023/200059 patent/WO2023193851A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| US20250244457A1 (en) | 2025-07-31 |
| WO2023193851A1 (de) | 2023-10-12 |
| KR20240152383A (ko) | 2024-10-21 |
| JP2025507139A (ja) | 2025-03-13 |
| DE102022203361A1 (de) | 2023-10-05 |
| CN119096164A (zh) | 2024-12-06 |
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Legal Events
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| 17P | Request for examination filed |
Effective date: 20241105 |
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Owner name: AUMOVIO AUTONOMOUS MOBILITY GERMANY GMBH |