EP1654726A2 - Capteur destine a un systeme de detection de proximite ou d'aide au stationnement d'un vehicule et son procede de production - Google Patents

Capteur destine a un systeme de detection de proximite ou d'aide au stationnement d'un vehicule et son procede de production

Info

Publication number
EP1654726A2
EP1654726A2 EP04733252A EP04733252A EP1654726A2 EP 1654726 A2 EP1654726 A2 EP 1654726A2 EP 04733252 A EP04733252 A EP 04733252A EP 04733252 A EP04733252 A EP 04733252A EP 1654726 A2 EP1654726 A2 EP 1654726A2
Authority
EP
European Patent Office
Prior art keywords
sensor
housing
coating
powder coating
powder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04733252A
Other languages
German (de)
English (en)
Other versions
EP1654726B1 (fr
Inventor
Wilhelm Korthals
Jürgen HÖNLE
Dietmar Grüdl
Stefan Triebl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Schalter und Sensoren GmbH
Original Assignee
Valeo Schalter und Sensoren GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=34276509&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1654726(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Valeo Schalter und Sensoren GmbH filed Critical Valeo Schalter und Sensoren GmbH
Publication of EP1654726A2 publication Critical patent/EP1654726A2/fr
Application granted granted Critical
Publication of EP1654726B1 publication Critical patent/EP1654726B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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 a sensor for a short-range detection or parking aid system of a vehicle, in particular an ultrasonic sensor, with a pot-like housing, the bottom of which is designed as an oscillatable membrane, the housing having a coating on at least the outside.
  • sensors are known in a variety of ways.
  • the sensors emit signals that are reflected on objects in the vicinity of the vehicle and are received again by the sensors. Due to the differences in the transmitted and received signals, conclusions can be drawn about objects in the vicinity of the vehicle.
  • Known sensors are either anodized or coated with cathodic dip coating (KTL).
  • KTL cathodic dip coating
  • a black anodized coating has proven to be advantageous if the sensors are to be installed in black on the vehicle. If the sensors are to be painted in the vehicle color, a KTL coating has proven to be advantageous as an adhesion promoter for the respective paint.
  • a KTL coating is not weatherproof and must therefore be painted over. It is therefore not possible to install the sensor with a KT coating in the unpainted state.
  • the coating of the sensors is problematic because they do not affect the mechanical vibration properties of the membrane may negatively influence. Influencing the vibration properties leads to incorrect, and therefore unusable, measured values.
  • the present invention has for its object to provide a sensor of the type described above, which has a suitable coating that does not negatively affect the vibration properties of the membrane.
  • the coating should be such that the sensor can be installed without additional painting.
  • the coating should be weatherproof.
  • Vibration behavior of the membrane is not or only insignificantly negative powder coating. Surprisingly, it has been shown that a powder coating does not have such a negative influence on the vibration behavior of the membrane that a measurement is not possible. There is only an insignificant negative impairment of the powder coating if the coating weakens or impairs the radiation or reception behavior of the sensor, the sensor nevertheless being suitable for a short-range detection or parking aid system. A weakening of the reception and / or transmission behavior of the membrane can be compensated for, for example, by changing the sensitivity of the sensor.
  • a powder coating in particular has the advantage that it is weather-resistant and that it can be painted. Sensors with powder-coated housings can therefore be painted or unpainted on the vehicle.
  • the powder coating is black, since black housings of sensors on the vehicle are not noticeable. If the sensors are to be made available in the vehicle color, the housing can be painted accordingly.
  • An advantageous embodiment of the invention provides that the housing is made of a metallic material and that the powder coating is located directly on the metallic material. There is consequently no further layer between the material and the powder coating, such as an anodized layer or a KTL coating. Precisely because the powder coating is provided directly on the metallic material, the vibration behavior of the membrane is only comparatively slightly impaired, if at all.
  • an intermediate layer between the metallic material and the powder coating.
  • Such an intermediate layer can be applied, for example, during the pretreatment of the metallic material and can be several micrometers thick.
  • Aluminum or one is advantageously provided as the metallic material.
  • Aluminum alloy has a particularly advantageous vibration behavior, particularly in connection with a powder coating.
  • a suitable agent can be used to pretreat the aluminum.
  • Phosphoric acid pickling has initially been found to be suitable, for example with NABADUR (STl / 156) from NABU-Oberpsychtechnik GmbH, in D-92507 Nabburg.
  • the aluminum should also undergo a chrome-free pretreatment, for example with NABUTAN (STl / 310) from NABU-Oberpsychtechnik GmbH, in D-92507 Nabburg.
  • a thin intermediate layer made of NABUTAN is then between the metallic material and the powder coating.
  • a preferred embodiment of the invention provides that the powder coating consists of an acrylic powder, a Polyester powder and / or is made from an epoxy powder.
  • An acrylic powder coating which is sold under the trade name ALESTA (AC3004-4905122 / AC3S20-9051) by DuPont Pulverlack GmbH & Co. KG, D-84051 Essenbach-Altheim, has proven to be particularly advantageous.
  • the powder coating can be overpainted at least in sections in the vehicle color.
  • the painting can be done before mounting the sensors or after mounting, together with the vehicle or the corresponding housing part.
  • the invention also relates to a housing for a sensor according to the invention, which has a powder coating.
  • the above-mentioned object is also achieved by a method for producing a sensor according to the invention or a housing of a sensor according to the invention, which is characterized in that the housing is powder-coated to produce the coating.
  • the material especially aluminum
  • EPS electrostatic charging
  • the powder is then baked in an oven at temperatures of approx. 180 ° to 220 ° object temperature and this process leads to a powder coating. As soon as the parts have cooled, they can either be installed directly or coated with another coating.
  • a powder coating has the advantage that it offers high mechanical resistance and optimal corrosion protection. Nevertheless, the vibration behavior on membranes is not negatively affected.
  • the housing 10 of a sensor 12 is shown in longitudinal section.
  • the housing 10 is pot-shaped and has a bottom 14.
  • the bottom 14 forms an oscillatable membrane, which can be set in motion by a piezo unit 16 arranged on the inside of the bottom 14.
  • the piezo unit 16 is controlled by electronics, which is accommodated in the pot-shaped housing and is not shown in the figure.
  • a powder coating 18 is provided on the outside of the housing 10, which is represented by the dashed line 20.
  • a further layer of lacquer can be located on the powder coating 18.
  • the outside of the housing 10 of the sensor 12 does not have to be completely powder-coated. It is crucial that the areas exposed to the weather, in particular the floor 14, have a powder coating 18.
  • the powder coating 18 is in particular an acrylic powder coating.
  • a coating with the trade name ALESTA from DuPont has proven to be particularly advantageous.
  • an intermediate layer protecting or pretreating the aluminum can be provided between the material of the housing 12, which in particular can be aluminum or an aluminum alloy, and the powder coating 18, an intermediate layer protecting or pretreating the aluminum can be provided.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Paints Or Removers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Devices For Checking Fares Or Tickets At Control Points (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
EP04733252A 2003-08-11 2004-05-15 Capteur destine a un systeme de detection de proximite ou d'aide au stationnement d'un vehicule et son procede de production Expired - Lifetime EP1654726B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10337734 2003-08-11
DE20316835 2003-11-03
PCT/EP2004/005242 WO2005024451A2 (fr) 2003-08-11 2004-05-15 Capteur destine a un systeme de detection de proximite ou d'aide au stationnement d'un vehicule et son procede de production

Publications (2)

Publication Number Publication Date
EP1654726A2 true EP1654726A2 (fr) 2006-05-10
EP1654726B1 EP1654726B1 (fr) 2010-04-28

Family

ID=34276509

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04733252A Expired - Lifetime EP1654726B1 (fr) 2003-08-11 2004-05-15 Capteur destine a un systeme de detection de proximite ou d'aide au stationnement d'un vehicule et son procede de production

Country Status (7)

Country Link
US (1) US7551520B2 (fr)
EP (1) EP1654726B1 (fr)
CN (1) CN1836270B (fr)
AT (1) ATE466360T1 (fr)
DE (1) DE502004011108D1 (fr)
ES (1) ES2344897T3 (fr)
WO (1) WO2005024451A2 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1836270B (zh) * 2003-08-11 2010-05-12 瓦莱奥开关传感器有限公司 用于车辆的传感器及其制造方法和传感器壳体
DE102005045306A1 (de) * 2005-09-16 2007-03-29 Valeo Schalter Und Sensoren Gmbh Verfahren zur Herstellung eines Ultraschallsensors sowie Ultraschallsensor
DE102006041975A1 (de) * 2006-09-07 2008-03-27 Hella Kgaa Hueck & Co. Ultraschallsensor und Verfahren zur Herstellung eines Ultraschallsensors
DE102009002983A1 (de) * 2009-05-11 2010-11-18 Robert Bosch Gmbh Membrantopf für einen Ultraschallwandler und Sensor damit
DE102009034418A1 (de) 2009-07-23 2011-01-27 Valeo Schalter Und Sensoren Gmbh Membran und Verfahren zur Herstellung einer Membran für einen Ultraschallwandler
WO2012001433A1 (fr) 2010-07-02 2012-01-05 Marko Borosak Dispositif d'évitement d'obstacle à laser incorporant un dispositif d'éclairage à diodes électroluminescentes
DE102010044994A1 (de) * 2010-09-10 2012-03-15 Valeo Schalter Und Sensoren Gmbh Ultraschallwandler für eine Fahrerassistenzeinrichtung
DE102010063442A1 (de) * 2010-12-17 2012-06-21 Robert Bosch Gmbh Schallwellenbasierter Sensor mit einer Schutzschicht zur Umfelddetektion und Verwendung desselben
US9007196B2 (en) 2011-12-14 2015-04-14 Ford Global Technologies, Llc Cost effective auto-actuation door check
CN104567962A (zh) * 2014-12-26 2015-04-29 常州波速传感器有限公司 一种改进涂装的超声波传感器
DE102015106044A1 (de) * 2015-04-21 2016-10-27 Valeo Schalter Und Sensoren Gmbh Ultraschallsensor für ein Kraftfahrzeug aus hochgefülltem Kunststoff, Fahrerassistenzsystem, Kraftfahrzeug sowie Verfahren
DE102019115032A1 (de) * 2019-06-04 2020-12-10 Tdk Electronics Ag Ultraschall-Wandler
US20220260712A1 (en) * 2019-06-04 2022-08-18 Tdk Electronics Ag Ultrasonic Transducer and Method for Producing an Ultrasonic Transducer
DE102019210315A1 (de) 2019-07-12 2021-01-14 Audi Ag Sichtbauteil mit funktionaler Beschichtung
DE102020202544A1 (de) 2020-02-27 2021-09-02 Brose Fahrzeugteile Se & Co. Kommanditgesellschaft, Bamberg Ultraschallsensor eines Kraftfahrzeugs

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Publication number Priority date Publication date Assignee Title
JPS63189100A (ja) 1987-02-02 1988-08-04 Toray Ind Inc 超音波トランスデユ−サ構造体
JP3311519B2 (ja) * 1994-10-25 2002-08-05 ティーディーケイ株式会社 圧電サウンダ
DE19744229A1 (de) 1997-10-07 1999-04-29 Bosch Gmbh Robert Ultraschallwandler
DE10023065B4 (de) 2000-02-12 2006-03-02 Volkswagen Ag Ultraschallsensor für ein Kraftfahrzeug
DE10007050A1 (de) 2000-02-17 2001-08-23 Volkswagen Ag Ultraschallsensor
EP1202249A1 (fr) 2000-10-26 2002-05-02 Imra Europe S.A. Transducteur étanche pour une array à demi-longeur d'onde
WO2002071002A1 (fr) 2001-03-02 2002-09-12 Spanner-Pollux Gmbh Transducteur destine a un debitmetre ultrasonique
DE10159679A1 (de) 2001-11-30 2003-06-12 Valeo Schalter & Sensoren Gmbh Ultraschallsensoreinheit und Verfahren zur Herstellung
EP1308084A1 (fr) * 2002-10-02 2003-05-07 Ciba SC Holding AG Combinaison UV-absorbante avec un effet synergistique
CN1836270B (zh) * 2003-08-11 2010-05-12 瓦莱奥开关传感器有限公司 用于车辆的传感器及其制造方法和传感器壳体

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005024451A2 *

Also Published As

Publication number Publication date
CN1836270B (zh) 2010-05-12
US7551520B2 (en) 2009-06-23
ATE466360T1 (de) 2010-05-15
DE502004011108D1 (de) 2010-06-10
ES2344897T3 (es) 2010-09-09
EP1654726B1 (fr) 2010-04-28
US20070017807A1 (en) 2007-01-25
CN1836270A (zh) 2006-09-20
WO2005024451A3 (fr) 2006-03-02
WO2005024451A2 (fr) 2005-03-17

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