EP1310942B1 - Ultrasonic sensor having a pot-like housing and its method of manufacture - Google Patents
Ultrasonic sensor having a pot-like housing and its method of manufacture Download PDFInfo
- Publication number
- EP1310942B1 EP1310942B1 EP02020785.8A EP02020785A EP1310942B1 EP 1310942 B1 EP1310942 B1 EP 1310942B1 EP 02020785 A EP02020785 A EP 02020785A EP 1310942 B1 EP1310942 B1 EP 1310942B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- membrane
- diaphragm
- ultrasonic sensor
- housing
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 7
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 239000000463 material Substances 0.000 claims description 11
- 238000002604 ultrasonography Methods 0.000 claims description 9
- 238000003754 machining Methods 0.000 claims description 3
- 230000003534 oscillatory effect Effects 0.000 claims 1
- 239000012528 membrane Substances 0.000 description 59
- 238000005187 foaming Methods 0.000 description 6
- 239000000919 ceramic Substances 0.000 description 5
- 238000003801 milling Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- QBWKPGNFQQJGFY-QLFBSQMISA-N 3-[(1r)-1-[(2r,6s)-2,6-dimethylmorpholin-4-yl]ethyl]-n-[6-methyl-3-(1h-pyrazol-4-yl)imidazo[1,2-a]pyrazin-8-yl]-1,2-thiazol-5-amine Chemical compound N1([C@H](C)C2=NSC(NC=3C4=NC=C(N4C=C(C)N=3)C3=CNN=C3)=C2)C[C@H](C)O[C@H](C)C1 QBWKPGNFQQJGFY-QLFBSQMISA-N 0.000 description 1
- 240000001439 Opuntia Species 0.000 description 1
- 235000004727 Opuntia ficus indica Nutrition 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229940125846 compound 25 Drugs 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000013017 mechanical damping Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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
- 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
- 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
Definitions
- the invention relates to an ultrasonic sensor with a pot-shaped membrane, which has a vibratory membrane bottom and a membrane wall surrounding the membrane bottom at least in sections.
- ultrasonic sensors are used, for example, in proximity detection systems of motor vehicles.
- the invention also relates to a method for producing such an ultrasonic sensor.
- Known ultrasonic sensors also have decoupling media between the diaphragm and a housing receiving the diaphragm.
- the individual components of the ultrasonic sensor are manufactured individually and joined together by nesting.
- the positioning of the membrane is subject to undesirable tolerance fluctuations due to the component tolerances.
- decoupling media are required, which decouple the vibration of the diaphragm against the housing.
- an ultrasonic sensor which comprises a housing made of a porous plastic material.
- the present invention has for its object to provide an ultrasonic sensor, in which an exact positioning of the membrane is possible and which has as few components.
- an ultrasonic sensor having the features of claim 1. It is therefore provided in particular that the membrane wall at least in sections has a foam-like structure, and the membrane bottom has a defoamed structure, and the membrane bottom is made of the same material as the membrane wall. Decoupling media between the membrane or the membrane wall and a housing, if such is provided, are not required. Since in the operating state of the ultrasonic sensor for generating ultrasound primarily the diaphragm bottom is used, the diaphragm wall may have a foam-like structure which has a reduced ability to oscillate. Such a membrane wall takes over the function of the known from the prior art decoupling media. Since the decoupling media are not required in the ultrasonic sensor according to the invention, a component reduction is achieved.
- the membrane bottom does not have a foam-like structure. This ensures that the membrane base retains its vibratory properties and can be used to generate ultrasound.
- the membrane bottom has a defoamed structure.
- the membrane bottom is initially formed foam-like and then defoamed, for example by compressing the foam-like portion which is to form the membrane bottom.
- the membrane base has the same material as the membrane wall.
- the membrane bottom may also consist of the same material as the membrane wall, wherein the membrane bottom is then not foamed and then defoamed, but consists of solid material.
- the membrane wall is made, for example, of a foamed material which has a foam-like structure.
- the ultrasonic sensor has no housing.
- the outer side of the membrane wall which preferably has completely a foamed structure, in this case provides for securing means for arrangement on a component.
- a component may in particular be a bumper of a vehicle.
- Such an embodiment of the invention has the advantage that neither a decoupling medium nor an extra housing is required.
- the diaphragm wall consisting of the foam-like structure consequently comprises the decoupling medium and the housing. Due to the achieved component reduction, the ultrasonic sensor can be arranged with exact position at the predetermined location. Undesirable tolerance deviations resulting from the individual tolerances of individual components according to the prior art do not occur. For precise positioning of the ultrasonic sensor to the component may be provided a point or line contact.
- the volume piece can be processed before use as a membrane wall and / or membrane bottom. Particularly advantageous has been found to deep draw the volume piece.
- the deep-drawing process can be realized from a foamed, preferably cylindrical volume piece, a cup-shaped membrane.
- the membrane wall is negligibly affected by the deep-drawing process.
- the membrane bottom is advantageously defoamed during the deep-drawing process, so that it can be used to generate ultrasound.
- Processing of the foamed volume piece and / or the deep-drawn volume piece can advantageously also be carried out by machining. Turning and milling of the foamed volume piece has proved to be advantageous.
- the foaming takes place in a foaming mold.
- the foaming of the volume piece can be controlled.
- post-processing is not required.
- the foaming mold advantageously has internal dimensions that correspond to the outer dimensions of the membrane. This has the advantage that highly accurate outer dimensions of the membrane can be realized without the need for reworking the outer surfaces. Tolerances can be maintained very accurately.
- the ultrasonic sensor 1 comprises a plastic housing 3 and a cup-shaped membrane 5 made of aluminum, wherein between the housing 3 and the diaphragm 5, a rubber-like, annular decoupling medium 7, is present.
- the membrane 5 consists of a membrane bottom 9 which is surrounded by a membrane wall 11. On the inside of the membrane bottom 9, a piezo-ceramic disc 13 is arranged. Via an electrical line 15, which ends at the piezo-ceramic disc 13 and a further electrical line 17, which is laterally caulked on the inside of the diaphragm 5, the piezo-ceramic disc 13 are subjected to an electrical voltage.
- the membrane 5 is filled with a mechanical damping substance 19.
- the damping material 19 has a cutout 21.
- a rubber part 23 is provided in the inner, upper region of the diaphragm 5.
- a silicone casting compound 25 is provided for sealing the upwardly open membrane 5. Furthermore, a housing cover 27 covers the upwardly open housing 3.
- the housing 3 can be arranged via fastening means 29 on a component, for example a bumper of a vehicle.
- the ultrasonic sensor according to the invention 41 according to the FIG. 2 a membrane 45 having a membrane wall 51 of a foam-like structure.
- the membrane wall 51 assumes the function of the membrane wall 11, the decoupling medium 7 and the housing 3 of an ultrasonic transducer 1 according to FIG. 1 ,
- FIG. 1 corresponding components are in the FIG. 2 provided with a corresponding reference numeral.
- the membrane bottom 49 of the membrane 45 has no foam-like, but a defoamed structure.
- Such a defoamed structure can according to the FIG. 1 be vibrated with a piezo-ceramic disc 13 in vibration.
- the ultrasonic sensor 41 according to FIG. 2 has compared to the known ultrasonic sensor 1 according to FIG. 1 the decisive advantage of having fewer components.
- the regions of the membrane 45, which are not intended to be used for vibration and thus for the generation of ultrasound, have a foamed structure, and thus a vibration-damped behavior.
- an ultrasonic transducer 41 for producing an ultrasonic transducer 41 according to FIG. 2 is advantageously a volume piece of a base material foamed, the the outer dimensions of the membrane 45 has.
- foaming can advantageously take place in a foaming mold which has internal dimensions which correspond to the outer dimensions of the membrane 45.
- the preferably cylindrical volume piece can be deep-drawn in such a way that the cup-shaped membrane 51 is formed.
- the membrane bottom 49 is thus produced by compressing the part of the volume piece which lies in a vertical projection above the inner surface of the membrane bottom 49.
- the material of the membrane bottom 49 is consequently defoamed by the deep-drawing process.
- the membrane bottom 49 has a sufficient vibration behavior for generating ultrasound.
- a processing of the membrane 45 can also be done by a machining, in particular by turning or milling.
- the Indian FIG. 2 shown ultrasonic sensor 41 can directly, ie without providing an extra housing, to a component, for example, to a bumper of a vehicle, are arranged.
- a membrane wall made of foamed material sufficient decoupling is ensured.
- the contact of the outside of the membrane 45 to, for example, a bumper may advantageously be punctiform or linear.
- the fastening means 29 are provided for placement on a component on the outside of the membrane wall 51.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
Die Erfindung betrifft einen Ultraschallsensor mit einer topfförmigen Membrane, die einen schwingungsfähigen Membranboden und eine den Membranboden wenigstens abschnittsweise umgebende Membranwandung aufweist. Derartige Ultraschallsensoren finden beispielsweise bei Nahbereichserkennungssystemen von Kraftfahrzeugen Verwendung.The invention relates to an ultrasonic sensor with a pot-shaped membrane, which has a vibratory membrane bottom and a membrane wall surrounding the membrane bottom at least in sections. Such ultrasonic sensors are used, for example, in proximity detection systems of motor vehicles.
Die Erfindung betrifft außerdem ein Verfahren zur Herstellung eines derartigen Ultraschallsensors.The invention also relates to a method for producing such an ultrasonic sensor.
Bekannte Ultraschallsensoren weisen ferner Entkopplungsmedien zwischen der Membrane und einem die Membrane aufnehmenden Gehäuse auf. Dabei werden die einzelnen Bauteile des Ultraschallsensors einzeln hergestellt und durch Ineinanderstecken miteinander gefügt. Zum einen unterliegt die Positionierung der Membrane aufgrund der Bauteiltoleranzen unerwünschten Toleranzschwankungen. Zum anderen sind Entkopplungsmedien erforderlich, die die Schwingung der Membrane gegen das Gehäuse entkoppeln.Known ultrasonic sensors also have decoupling media between the diaphragm and a housing receiving the diaphragm. The individual components of the ultrasonic sensor are manufactured individually and joined together by nesting. On the one hand, the positioning of the membrane is subject to undesirable tolerance fluctuations due to the component tolerances. On the other hand decoupling media are required, which decouple the vibration of the diaphragm against the housing.
Insbesondere aus der
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen Ultraschallsensor bereitzustellen, bei dem eine exakte Positionierung der Membrane möglich ist und der möglichst wenig Bauteile aufweist.The present invention has for its object to provide an ultrasonic sensor, in which an exact positioning of the membrane is possible and which has as few components.
Diese Aufgabe wird durch einen Ultraschallsensor mit den Merkmalen des Anspruchs 1 gelöst. Es ist also insbesondere vorgesehen, dass die Membranwandung wenigstens abschnittweise eine schaumartige Struktur aufweist, und der Membranboden eine entschäumte Struktur aufweist, und der Membranboden aus dem gleichen Material wie die Membranwandung ist. Entkopplungsmedien zwischen der Membrane bzw. der Membranwandung und einem Gehäuse, falls ein derartiges vorgesehen ist, sind nicht erforderlich. Da im Betriebszustand des Ultraschallsensors zur Erzeugung von Ultraschall in erster Linie der Membranboden Verwendung findet, kann die Membranwandung eine schaumähnliche Struktur besitzen, die eine reduzierte Fähigkeit zu schwingen aufweist. Eine derartige Membranwandung übernimmt die Funktion der aus dem Stand der Technik bekannten Entkopplungsmedien. Da bei dem erfindungsgemäßen Ultraschallsensor die Entkopplungsmedien nicht erforderlich sind, wird eine Bauteilreduzierung erzielt.This object is achieved by an ultrasonic sensor having the features of claim 1. It is therefore provided in particular that the membrane wall at least in sections has a foam-like structure, and the membrane bottom has a defoamed structure, and the membrane bottom is made of the same material as the membrane wall. Decoupling media between the membrane or the membrane wall and a housing, if such is provided, are not required. Since in the operating state of the ultrasonic sensor for generating ultrasound primarily the diaphragm bottom is used, the diaphragm wall may have a foam-like structure which has a reduced ability to oscillate. Such a membrane wall takes over the function of the known from the prior art decoupling media. Since the decoupling media are not required in the ultrasonic sensor according to the invention, a component reduction is achieved.
Es ist vorgesehen, dass der Membranboden keine schaumartige Struktur aufweist. Dadurch wird gewährleistet, dass der Membranboden seine schwingungsfähigen Eigenschaften behält und zur Erzeugung von Ultraschall Verwendung finden kann.It is envisaged that the membrane bottom does not have a foam-like structure. This ensures that the membrane base retains its vibratory properties and can be used to generate ultrasound.
Der Membranboden weist eine entschäumte Struktur auf. Hierbei ist denkbar, dass der Membranboden zunächst schaumartig ausgebildet wird und dann, beispielsweise durch Zusammenpressen des schaumartigen Abschnitts, der den Membranboden bilden soll, entschäumt wird.The membrane bottom has a defoamed structure. In this case, it is conceivable that the membrane bottom is initially formed foam-like and then defoamed, for example by compressing the foam-like portion which is to form the membrane bottom.
Der Membranboden weist dabei das gleiche Material wie die Membranwandung auf. Der Membranboden kann aber auch aus dem gleichen Material wie die Membranwandung bestehen, wobei der Membranboden dann nicht aufgeschäumt und anschließend entschäumt ist, sondern aus massivem Material besteht.The membrane base has the same material as the membrane wall. The membrane bottom may also consist of the same material as the membrane wall, wherein the membrane bottom is then not foamed and then defoamed, but consists of solid material.
Die Membranwandung ist beispielsweise aus einem aufgeschäumten Material, das eine schaumartige Struktur besitzt.The membrane wall is made, for example, of a foamed material which has a foam-like structure.
Bei einer besonders bevorzugten Ausführungsform der Erfindung weist der Ultraschallsensor kein Gehäuse auf. Die Außenseite der Membranwandung, die vorzugsweise vollständig eine geschäumte Struktur aufweist, sieht hierbei Besfestigungsmittel zur Anordnung an ein Bauteil vor. Ein derartiges Bauteil kann insbesondere ein Stoßfänger eines Fahrzeuges sein. Eine derartige Ausgestaltung der Erfindung hat den Vorteil, dass weder ein Entkopplungsmedium noch ein extra Gehäuse erforderlich ist. Die aus der schaumartigen Struktur bestehende Membranwandung umfasst folglich das Entkopplungsmedium und das Gehäuse. Aufgrund der erzielten Bauteilreduzierung kann der Ultraschallsensor positionsgenau an der vorgegebenen Stelle angeordnet werden. Unerwünschte Toleranzabweichungen, die aus den Einzeltoleranzen einzelner Bauteile gemäß dem Stand der Technik resultieren, treten nicht auf. Zur positionsgenauen Anordnung des Ultraschallsensors an das Bauteil kann eine punkt- oder linienförmige Berührung vorgesehen sein.In a particularly preferred embodiment of the invention, the ultrasonic sensor has no housing. The outer side of the membrane wall, which preferably has completely a foamed structure, in this case provides for securing means for arrangement on a component. Such a component may in particular be a bumper of a vehicle. Such an embodiment of the invention has the advantage that neither a decoupling medium nor an extra housing is required. The diaphragm wall consisting of the foam-like structure consequently comprises the decoupling medium and the housing. Due to the achieved component reduction, the ultrasonic sensor can be arranged with exact position at the predetermined location. Undesirable tolerance deviations resulting from the individual tolerances of individual components according to the prior art do not occur. For precise positioning of the ultrasonic sensor to the component may be provided a point or line contact.
Die eingangs genannte Aufgabe wird außerdem durch ein Verfahren zur Herstellung eines erfindungsgemäßen Ultraschallsensors mit den Merkmalen des Anspruchs 3 gelöst. Bereiche der Membrane, die nicht zur Erzeugung von Ultraschall Verwendung finden, bestehen folglich nicht aus Vollmaterial, sondern aus einer schaumartigen Struktur, die eine reduzierte Schwingfähigkeit aufweist. Dabei kann das Volumenstück vor der Verwendung als Membranwandung und/oder Membranboden bearbeitet werden. Besonders vorteilhaft hat sich herausgestellt, das Volumenstück tiefzuziehen. Durch den Tiefziehvorgang kann aus einem aufgeschäumten, vorzugsweise zylindrischen Volumenstück, eine topfförmige Membrane realisiert werden. Die Membranwandung wird durch den Tiefziehvorgang unwesentlich beeinträchtigt. Im Gegensatz dazu wird der Membranboden beim Tiefziehvorgang vorteilhafterweise entschäumt, so dass er zur Erzeugung von Ultraschall Verwendung finden kann.The aforementioned object is also achieved by a method for producing an ultrasonic sensor according to the invention with the features of claim 3. Consequently, regions of the membrane which are not used for generating ultrasound do not consist of solid material but of a foam-like structure which has a reduced tendency to oscillate. In this case, the volume piece can be processed before use as a membrane wall and / or membrane bottom. Particularly advantageous has been found to deep draw the volume piece. By the deep-drawing process can be realized from a foamed, preferably cylindrical volume piece, a cup-shaped membrane. The membrane wall is negligibly affected by the deep-drawing process. In contrast, the membrane bottom is advantageously defoamed during the deep-drawing process, so that it can be used to generate ultrasound.
Eine Bearbeitung des aufgeschäumten Volumenstücks und/oder des tiefgezogenen Volumenstücks kann vorteilhafterweise auch spanend erfolgen. Als vorteilhaft hat sich Drehen und Fräsen des aufgeschäumten Volumenstücks erwiesen.Processing of the foamed volume piece and / or the deep-drawn volume piece can advantageously also be carried out by machining. Turning and milling of the foamed volume piece has proved to be advantageous.
Bei einem bevorzugten Verfahren erfolgt das Aufschäumen in einer Aufschäumform. Hierdurch kann das Aufschäumen des Volumenstücks kontrolliert erfolgen. Idealerweise ist eine Nachbearbeitung dann nicht erforderlich.In a preferred method, the foaming takes place in a foaming mold. As a result, the foaming of the volume piece can be controlled. Ideally, post-processing is not required.
Die Aufschäumform weist hierbei vorteilhafterweise Innenabmessungen auf, die den Außenabmessungen der Membrane entsprechen. Dies hat den Vorteil, dass hochgenaue Außenabmessungen der Membrane realisiert werden können, ohne dass eine Nachbearbeitung der Außenflächen erforderlich ist. Toleranzen können sehr genau eingehalten werden.The foaming mold advantageously has internal dimensions that correspond to the outer dimensions of the membrane. This has the advantage that highly accurate outer dimensions of the membrane can be realized without the need for reworking the outer surfaces. Tolerances can be maintained very accurately.
Weitere vorteilhafte Ausgestaltungen und Einzelheiten der Erfindung sind der folgenden Beschreibung zu entnehmen, in der die Erfindung anhand des in der Zeichnung dargestellten Ausführungsbeispiels näher beschrieben und erläutert ist.Further advantageous embodiments and details of the invention are apparent from the following description in which the invention with reference to the embodiment shown in the drawing is described and explained in more detail.
Es zeigen:
-
Figur 1 einen Ultraschallsensor im Längsschnitt gemäß dem bekannten Stand der Technik; und -
Figur 2
-
FIG. 1 an ultrasonic sensor in longitudinal section according to the known prior art; and -
FIG. 2 an ultrasonic sensor according to the invention in longitudinal section.
In der
Die Membrane 5 besteht aus einem Membranboden 9, der von einer Membranwandung 11 umfasst wird. Auf der Innenseite des Membranbodens 9 ist eine Piezo-Keramik-Scheibe 13 angeordnet. Über eine elektrische Leitung 15, die an der Piezo-Keramik-Scheibe 13 endet und eine weitere elektrische Leitung 17, die seitlich an der Innenseite der Membrane 5 verstemmt ist, kann die Piezo-Keramik-Scheibe 13 mit einer elektrischen Spannung beaufschlagt werden.The
Des Weiteren ist die Membrane 5 mit einem mechanischen Dämpfstoff 19 aufgefüllt. In dem Bereich, in dem die elektrische Leitung 15 zu der Piezo-Keramik-Scheibe 13 verläuft, weist der Dämpfstoff 19 einen Ausschnitt 21 auf. Zur Positionierung des Dämpfstoffes 19 ist im inneren, oberen Bereich der Membrane 5 ein Gummiteil 23 vorgesehen.Furthermore, the
Zum Abdichten der nach oben offenen Membrane 5 ist eine Silikonvergussmasse 25 vorgesehen. Ferner deckt ein Gehäusedeckel 27 das nach oben offene Gehäuse 3 ab. Das Gehäuse 3 kann über Befestigungsmittel 29 an einem Bauteil, beispielsweise einem Stoßfänger eines Fahrzeugs, angeordnet werden.For sealing the upwardly
Im Gegensatz zu dem bekannten Ultraschallsensor 1 weist der erfindungsgemäße Ultraschallsensor 41 gemäß der
Die der
Der Ultraschallsensor 41 gemäß
Zur Herstellung eines Ultraschallwandlers 41 gemäß
Eine Bearbeitung der Membrane 45 kann ferner durch eine spanende Bearbeitung, insbesondere durch Drehen oder Fräsen, erfolgen.A processing of the
Der in der
In
Claims (4)
- Ultrasound sensor (41) having a pot-shaped diaphragm (45) which has an oscillatory diaphragm base (49) and which has a diaphragm wall (51) which surrounds the diaphragm base (49) at least sectionally, wherein the diaphragm wall (51) has a foam-like structure at least sectionally, and the diaphragm base (49) is composed of the same material as the diaphragm wall (51),
characterized in that
the diaphragm base (49) has a defoamed structure. - Ultrasound sensor (41) according to Claim 1,
characterized in that the outside of the diaphragm wall (51) has fastening means (29) for arrangement at a component, for example at a bumper of a vehicle. - Method for producing an ultrasound sensor (41) according to either of the preceding claims, wherein a base material is foamed to form a volume piece, and the volume piece has, at least sectionally, a foam-like structure forming the diaphragm wall (51) and forms the diaphragm base (49), characterized in that
the foamed volume piece forming the diaphragm base (49) is defoamed during the machining for realizing the diaphragm base (49). - Method according to Claim 3, characterized in that the defoaming is realized by deep drawing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10156259A DE10156259A1 (en) | 2001-11-09 | 2001-11-09 | Ultrasonic sensor and method for manufacturing an ultrasonic sensor |
| DE10156259 | 2001-11-09 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1310942A2 EP1310942A2 (en) | 2003-05-14 |
| EP1310942A3 EP1310942A3 (en) | 2008-07-30 |
| EP1310942B1 true EP1310942B1 (en) | 2018-07-25 |
Family
ID=7705945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02020785.8A Expired - Lifetime EP1310942B1 (en) | 2001-11-09 | 2002-09-17 | Ultrasonic sensor having a pot-like housing and its method of manufacture |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6792810B2 (en) |
| EP (1) | EP1310942B1 (en) |
| DE (1) | DE10156259A1 (en) |
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| JP2005308639A (en) * | 2004-04-23 | 2005-11-04 | Denso Corp | Ultrasonic sensor |
| KR100776518B1 (en) * | 2004-04-26 | 2007-11-16 | 가부시키가이샤 무라타 세이사쿠쇼 | Ultrasonic sensor |
| DE102004036215B4 (en) * | 2004-06-11 | 2010-07-08 | Continental Automotive Gmbh | sensor arrangement |
| JP4306561B2 (en) | 2004-08-11 | 2009-08-05 | 株式会社デンソー | Ultrasonic sensor |
| DE102005002626A1 (en) * | 2005-01-12 | 2006-07-20 | Valeo Schalter Und Sensoren Gmbh | Sensor for a proximity detection or parking assistance system of a vehicle and contact wire therefor |
| JP2006203563A (en) * | 2005-01-20 | 2006-08-03 | Nippon Soken Inc | Ultrasonic sensor |
| JP2007183185A (en) * | 2006-01-06 | 2007-07-19 | Denso Corp | Ultrasonic sensor |
| DE102006028211A1 (en) * | 2006-06-14 | 2007-12-20 | Valeo Schalter Und Sensoren Gmbh | Ultrasonic sensor with membrane |
| DE102006040344B4 (en) * | 2006-08-29 | 2022-09-29 | Robert Bosch Gmbh | Holding device for an ultrasonic transducer |
| DE102006050037A1 (en) * | 2006-10-24 | 2008-04-30 | Robert Bosch Gmbh | Ultrasonic transducer for motor vehicle, has damping unit for damping vibrations of wall, arranged in diaphragm pot in edge section of diaphragm and connected with edge section and inner side of wall in force-fitting manner |
| ITMO20110053A1 (en) | 2011-03-07 | 2012-09-08 | Meta System Spa | PROCEDURE FOR THE CONSTRUCTION OF A SENSOR DEVICE, IN PARTICULAR OF A SENSOR DEVICE THAT CAN BE USED IN CAR PARKING SYSTEMS FOR VEHICLES |
| US8256076B1 (en) | 2011-11-19 | 2012-09-04 | Murray F Feller | Method of making an ultrasonic transducer |
| DE102012200639A1 (en) * | 2012-01-17 | 2013-07-18 | Robert Bosch Gmbh | ultrasonic sensor |
| US8676438B2 (en) | 2012-07-31 | 2014-03-18 | Ford Global Technologies | Method and system for implementing ultrasonic sensor signal strength calibrations |
| US8682523B2 (en) | 2012-07-31 | 2014-03-25 | Ford Global Technologies | Method and system for implementing ultrasonic sensor signal strength calibrations |
| CN103713290A (en) | 2012-10-05 | 2014-04-09 | 福特全球技术公司 | Method, system, and device used for reducing object report errors of driving assistant characteristics |
| DE102013022063A1 (en) * | 2013-12-23 | 2015-06-25 | Valeo Schalter Und Sensoren Gmbh | Method for producing an ultrasonic sensor for a motor vehicle |
| 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 |
| DE102017221618A1 (en) * | 2017-10-27 | 2019-05-02 | Continental Automotive Gmbh | Ultrasonic transducer with at least one piezoelectric oscillator |
| CN112948943B (en) * | 2021-03-22 | 2022-11-18 | 西南交通大学 | Front and rear processing method of OpenSees software of grid type underground continuous wall foundation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5457352A (en) * | 1992-09-15 | 1995-10-10 | Endress + Hauser Gmbh + Co. | Ultrasonic converter |
| US6587564B1 (en) * | 1999-05-25 | 2003-07-01 | Ronald Y. Cusson | Resonant chamber sound pick-up |
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| GB2059717B (en) * | 1979-09-25 | 1984-04-04 | Victor Company Of Japan | Speaker diaphragm assembly and a method of manufacturing the same |
| US4536673A (en) * | 1984-01-09 | 1985-08-20 | Siemens Aktiengesellschaft | Piezoelectric ultrasonic converter with polyurethane foam damper |
| US4556814A (en) | 1984-02-21 | 1985-12-03 | Ngk Spark Plug Co., Ltd. | Piezoelectric ultrasonic transducer with porous plastic housing |
| JPS62254600A (en) * | 1986-04-28 | 1987-11-06 | Fuji Electric Co Ltd | Ultrasonic sensor |
| JPH057835Y2 (en) * | 1986-06-10 | 1993-02-26 | ||
| DE3832947C2 (en) * | 1988-09-28 | 1996-04-11 | Siemens Ag | Ultrasound transducer |
| DE4114180C2 (en) * | 1991-05-01 | 2003-04-03 | Microsonic Ges Fuer Mikroelekt | ultrasound transducer |
| DE19507650A1 (en) * | 1995-03-06 | 1996-09-12 | Gregor Verpoorten | Ultrasonic sensor for determining distance of objects with pan shaped housing |
| DE19538678C2 (en) * | 1995-10-17 | 1998-12-10 | Endress Hauser Gmbh Co | Arrangement for monitoring a predetermined fill level of a liquid in a container |
| DE19538696C2 (en) * | 1995-10-17 | 1997-09-25 | Endress Hauser Gmbh Co | Arrangement for monitoring a predetermined fill level of a liquid in a container |
| DE19620133C2 (en) * | 1996-05-18 | 2001-09-13 | Endress Hauser Gmbh Co | Sound or ultrasonic sensor |
| DE19754891C1 (en) * | 1997-12-10 | 1999-07-15 | Fraunhofer Ges Forschung | Ultrasonic transducer |
-
2001
- 2001-11-09 DE DE10156259A patent/DE10156259A1/en not_active Withdrawn
-
2002
- 2002-09-17 EP EP02020785.8A patent/EP1310942B1/en not_active Expired - Lifetime
- 2002-11-04 US US10/286,782 patent/US6792810B2/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5457352A (en) * | 1992-09-15 | 1995-10-10 | Endress + Hauser Gmbh + Co. | Ultrasonic converter |
| US6587564B1 (en) * | 1999-05-25 | 2003-07-01 | Ronald Y. Cusson | Resonant chamber sound pick-up |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10156259A1 (en) | 2003-05-22 |
| US6792810B2 (en) | 2004-09-21 |
| EP1310942A3 (en) | 2008-07-30 |
| US20030089172A1 (en) | 2003-05-15 |
| EP1310942A2 (en) | 2003-05-14 |
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