EP1654726B1 - 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 Download PDF

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Publication number
EP1654726B1
EP1654726B1 EP04733252A EP04733252A EP1654726B1 EP 1654726 B1 EP1654726 B1 EP 1654726B1 EP 04733252 A EP04733252 A EP 04733252A EP 04733252 A EP04733252 A EP 04733252A EP 1654726 B1 EP1654726 B1 EP 1654726B1
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.)
Expired - Lifetime
Application number
EP04733252A
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German (de)
English (en)
Other versions
EP1654726A2 (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
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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
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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 Nah Schlerkennungs- or Einpark Anlagensystem a vehicle, in particular an ultrasonic sensor, with a pot-like housing whose bottom is designed as a vibrating diaphragm, wherein the housing has a coating on at least the outside.
  • Such sensors are known in many ways.
  • the sensors send out signals that are reflected by objects in the immediate vicinity of the vehicle and are received by the sensors again. Due to the differences between the transmitted and received signals, conclusions can be drawn about objects in the immediate vicinity of the vehicle. DE 100 07 050 discloses such sensors.
  • Known sensors are either coated with anodized or 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 the color black on the vehicle. If the sensors are to be painted in the body color, then a KTL coating has proved to be advantageous as a primer for the respective paint.
  • a KTL coating is not weather-resistant and must therefore be painted over. Installation of the sensor with a KTL coating in the uncoated state is therefore not possible.
  • the coating of the sensors is problematic because it does not affect the mechanical vibration characteristics 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 adversely affect the vibration characteristics of the membrane.
  • the coating should be such that the sensor can be installed without an additional paint job.
  • the coating should be weatherproof.
  • a sensor of the type mentioned above such that the coating is a weather-resistant, overcoatable and the vibration behavior of the membrane is not or only slightly negatively affecting powder coating.
  • a powder coating does not adversely affect the vibration behavior of the membrane in such a way that a measurement is not possible.
  • An only insignificantly negative impairment of the powder coating is present if the coating indeed attenuates or impairs the emission or reception behavior of the sensor, the sensor nevertheless being suitable for a proximity detection or parking aid system.
  • a weakening of the reception and / or transmission behavior of the diaphragm can be compensated, for example, by a change in the sensitivity of the sensor.
  • a powder coating has the advantage that it is weather-resistant and that it is paintable. Sensors with powder-coated housings can consequently be painted or unpainted on the vehicle.
  • the powder coating is black, since black housings of sensors on the vehicle do not attract attention. If the sensors are to be provided in body color, the housings 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. Consequently, no further layer is present between the material and the powder coating, such as, for example, an anodized coating or a cathodic dip coating. Precisely because the powder coating is provided directly on the metallic material, the vibration behavior of the membrane, if at all, is affected only comparatively small.
  • an intermediate layer is located between the metallic material and the powder coating.
  • Such an intermediate layer can be applied for example in the pretreatment of the metallic material and be several micrometers thick.
  • aluminum or one is provided as the metallic material.
  • Aluminum, or an aluminum alloy has, in particular in conjunction with a powder coating, a particularly advantageous vibration behavior.
  • a corresponding agent can be used for the pretreatment of the aluminum.
  • a phosphoric acid pickling solution has proven to be suitable, for example with NABADUR (STI / 156) from NABU overseentechnik GmbH, in D-92507 Nabburg.
  • the aluminum should also undergo a chromium-free pretreatment, for example with NABUTAN (STI / 310) from NABU overseentechnik GmbH, in D-92507 Nabburg.
  • NABUTAN chromium-free pretreatment
  • a preferred embodiment of the invention provides that the powder coating of an acrylic powder, a Polyester powder and / or made of an epoxy powder.
  • An acrylic powder coating has proven to be particularly advantageous which is sold under the trade name ALESTA (AC3004-4905122 / AC3S20-9051) by DuPont Pulverlack GmbH & Co. KG, D-84051 Essenbach-Altheim.
  • the powder coating can be at least partially overpainted in the vehicle color.
  • the painting can be carried out before mounting the sensors or after assembly, 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 object mentioned in the introduction is also achieved by a method for producing a sensor according to the invention as claimed in claim 8.
  • the material in particular aluminum, is coated with the corresponding powder by means of electrostatic charging (EPS).
  • EPS electrostatic charging
  • the powder is then baked in an oven at temperatures of about 180 ° to 220 ° object temperature and runs in this process to a powder coating. Once the parts have cooled down, they can either be installed directly or painted with another coating.
  • Powder coating has the advantage that it offers high mechanical resistance and optimum corrosion protection. Nevertheless, the vibration behavior on membranes is not adversely 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 a vibratable membrane, which can be set by a disposed on the inside of the bottom 14 Piezo unit 16 in vibration.
  • the piezoelectric unit 16 is driven by an electronics, which is housed in the pot-shaped housing and is not shown in the figure.
  • a powder coating 18 is provided, which is represented by the dashed line 20.
  • the outside of the housing 10 of the sensor 12 does not have to be completely powder-coated. It is crucial that the weather-exposed areas, in particular the bottom 14, a powder coating 18 has.
  • the powder coating 18 is in particular an acrylic powder coating. Particularly advantageous is a coating with the trade name ALESTA DuPont has been found. Hiss the material of the housing 12, which may be in particular aluminum or an aluminum alloy, and the powder coating 18 may be provided an aluminum protective or pretreating intermediate layer.

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)
  • Transducers For Ultrasonic Waves (AREA)
  • Devices For Checking Fares Or Tickets At Control Points (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Claims (10)

  1. Capteur (12) pour un système de détection de zone de proximité ou d'aide au stationnement d'un véhicule, notamment capteur à ultrasons, comprenant un boîtier (10) en forme de pot dont le fond (14) est réalisé sous la forme d'une membrane pouvant osciller, le boîtier présentant un revêtement au moins sur le côté extérieur, caractérisé en ce que le revêtement est un revêtement par poudre (18) résistant aux intempéries, vernissable et n'affectant pas ou seulement de manière négligeable la caractéristique oscillante de la membrane.
  2. Capteur (12) selon la revendication 1, caractérisé en ce que le boîtier (10) est composé d'un matériau métallique et que le revêtement par poudre (18) se trouve directement sur le matériau métallique.
  3. Capteur (12) selon la revendication 1 ou 2,
    caractérisé en ce que le boîtier (10) est composé d'un matériau métallique et qu'une couche intermédiaire se trouve entre le matériau métallique et le revêtement par poudre (18).
  4. Capteur (12) selon la revendication 2 ou 3,
    caractérisé en ce que le matériau métallique est de l'aluminium ou un alliage d'aluminium.
  5. Capteur (12) selon la revendication 1, 2 ou 3, caractérisé en ce que le revêtement par poudre (18) est fabriqué à partir d'une poudre d'acrylique, d'une poudre de polyester et/ou d'une poudre d'époxy.
  6. Capteur (12) selon l'une des revendications précédentes, caractérisé en ce que le revêtement par poudre (18) présente une couleur sombre et notamment une couleur noire.
  7. Capteur (12) selon l'une des revendications précédentes, caractérisé en ce que le revêtement par poudre (18) est vernis au moins sur certaines portions.
  8. Procédé de fabrication d'un capteur selon l'une des revendications 1 à 6, un boîtier (10) en forme de pot dont le fond (14) est réalisé sous la forme d'une membrane pouvant osciller étant fourni, le boîtier présentant un revêtement au moins sur le côté extérieur, caractérisé en ce que le boîtier (10) est revêtu de poudre pour réaliser le revêtement par poudre (18) résistant aux intempéries, vernissable et n'affectant pas ou seulement de manière négligeable la caractéristique oscillante de la membrane.
  9. Procédé de fabrication d'un capteur selon la revendication 8, caractérisé en ce qu'après le revêtement par poudre, le boîtier (10) est vernis ou assemblé sans autre traitement.
  10. Procédé de fabrication d'un capteur selon la revendication 8 ou 9, caractérisé en ce que le boîtier (10) est soumis à un traitement préalable avant le revêtement par poudre, notamment en appliquant une couche intermédiaire.
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 EP1654726A2 (fr) 2006-05-10
EP1654726B1 true 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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010063442A1 (de) * 2010-12-17 2012-06-21 Robert Bosch Gmbh Schallwellenbasierter Sensor mit einer Schutzschicht zur Umfelddetektion und Verwendung desselben
WO2021008849A1 (fr) 2019-07-12 2021-01-21 Audi Ag Composant visible à revêtement fonctionnel

Families Citing this family (13)

* 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
US20130105670A1 (en) 2010-07-02 2013-05-02 Marko Borosak Pulsed laser signal disrupting device incorporating led illuminator
DE102010044994A1 (de) * 2010-09-10 2012-03-15 Valeo Schalter Und Sensoren Gmbh Ultraschallwandler für eine Fahrerassistenzeinrichtung
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
DE112020002662A5 (de) * 2019-06-04 2022-03-10 Tdk Electronics Ag Ultraschall-wandler und verfahren zur herstellung eines ultraschall-wandlers
DE102019115032A1 (de) * 2019-06-04 2020-12-10 Tdk Electronics Ag Ultraschall-Wandler
DE102020202544A1 (de) 2020-02-27 2021-09-02 Brose Fahrzeugteile Se & Co. Kommanditgesellschaft, Bamberg Ultraschallsensor eines Kraftfahrzeugs

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010063442A1 (de) * 2010-12-17 2012-06-21 Robert Bosch Gmbh Schallwellenbasierter Sensor mit einer Schutzschicht zur Umfelddetektion und Verwendung desselben
WO2021008849A1 (fr) 2019-07-12 2021-01-21 Audi Ag Composant visible à revêtement fonctionnel
US12027038B2 (en) 2019-07-12 2024-07-02 Audi Ag Visible components with functional coating

Also Published As

Publication number Publication date
WO2005024451A2 (fr) 2005-03-17
CN1836270A (zh) 2006-09-20
WO2005024451A3 (fr) 2006-03-02
CN1836270B (zh) 2010-05-12
US20070017807A1 (en) 2007-01-25
US7551520B2 (en) 2009-06-23
ES2344897T3 (es) 2010-09-09
DE502004011108D1 (de) 2010-06-10
EP1654726A2 (fr) 2006-05-10
ATE466360T1 (de) 2010-05-15

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