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WO2008125260A1 - Capteur à ultrasons invisible - Google Patents

Capteur à ultrasons invisible Download PDF

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Publication number
WO2008125260A1
WO2008125260A1 PCT/EP2008/002797 EP2008002797W WO2008125260A1 WO 2008125260 A1 WO2008125260 A1 WO 2008125260A1 EP 2008002797 W EP2008002797 W EP 2008002797W WO 2008125260 A1 WO2008125260 A1 WO 2008125260A1
Authority
WO
WIPO (PCT)
Prior art keywords
piezoceramic
component
module
ultrasonic transmitter
sensor
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.)
Ceased
Application number
PCT/EP2008/002797
Other languages
German (de)
English (en)
Inventor
Knut Schmidt
Hans Ferkel
Thomas Daue
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.)
Volkswagen AG
Original Assignee
Volkswagen AG
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
Application filed by Volkswagen AG filed Critical Volkswagen AG
Publication of WO2008125260A1 publication Critical patent/WO2008125260A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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
    • G10K9/20—Sounding members

Definitions

  • the present invention relates to an ultrasonic sensor with the preamble of claim 1 and a component with the preamble of claim 12.
  • ultrasonic sensors are currently used to measure the distance of the motor vehicle from an object.
  • the ultrasonic sensor is used here, for example, in conjunction with a distance display and a parking aid.
  • the ultrasound sensor emits a directed ultrasound signal by means of a vibrating diaphragm or generally an actuator, which is reflected at the object and is subsequently detected by the ultrasound sensor itself or another sensor.
  • the transit time of the ultrasound signal can be used to determine the distance of the object at which the ultrasound signal was reflected.
  • the ultrasonic sensor is usually mounted in a module on or in the motor vehicle.
  • the ultrasonic sensor is received by a holder which allows attachment, for example, inside the bumper. In the bumper an opening is provided, through which the ultrasonic sensor can emit the ultrasonic signals to the outside.
  • the sensors and their holders are pre-painted in a corresponding body color or chrome-plated.
  • the sensors and their holders are pre-painted in a corresponding body color or chrome-plated.
  • mounting holes punched on painted bumpers glued the pre-painted holder and also pre-painted sensors in the holder (along with a plastic ring for acoustic decoupling of the sensor from the bumper) - clipped.
  • the sensors are therefore not covered, but designed in the same color, so that they are barely visible.
  • the publication describes a method for concealed installation of a sensor in a motor vehicle outer part, characterized in that the sensor at a predetermined location of the motor vehicle outer part, preferably arranged flush with the membrane to the outer surface of the motor vehicle outer part and that at least the location , on which the sensor is located, is provided with a cover adapted to the contour of the motor vehicle outer part:
  • the patent application also describes an associated device.
  • Ultrasonic measuring systems are installed, for example, to perform a distance measurement for parking aids.
  • the measuring systems are based on thin, circular piezoceramic disks, which are applied to the bottom of a barrel-shaped metal cap.
  • an electronics for sensor-related analysis of the signals is additionally installed and encapsulated.
  • An air ultrasonic field is emitted via the circular piezoceramic disks, which is reflected upon impact with an obstacle and sensed by the same piezoceramic disk. From the duration of the reflected signal, the distance of an obstacle can be calculated.
  • the sensors are usually mounted today at the position of the bumper with the largest bulge. Hereby they are usually in the painted area of the bumper. In two-part bumpers, a partial positioning is also possible in the lower, non-painted area. But then a directional mode of action parallel to the roadway is possible here usually still appropriate Hutzen must be formed on the lower bumper section, which affect the visual appearance even more.
  • the object of the invention is advantageously achieved by an ultrasonic transmitter and / or receiver (ultrasonic sensor) with an actuator for transmission and a sensor for receiving vibrations and associated electronics for generating and evaluating the vibrations by advantageously provided that the one component for Swinging ing, emitting actuator and / or receiving sensor is a piezoceramic element with a specifiable actuator and / or sensory performance, is within a piezoceramic module, which is not visible from the outside integrated into the component or can be applied to the component.
  • Ultrasound systems mostly work as resonant systems.
  • the electrical impedance becomes a minimum at the resonance frequency, so that a high mechanical oscillation yield of the ultrasonic transducer is achieved even with small electrical excitation powers.
  • the necessary electrical excitation power to ensure the desired functional.
  • the operation of the measuring system depends on the one hand on the coupling [application or integration of the piezoceramic module as an ultrasonic transducer on the component] of the piezoceramic module. If the piezoceramic module, as in the prior art, is coupled to air, a piezoceramic ultrasonic transducer which oscillates at a resonant frequency has a lower electrical excitation power than a piezoceramic ultrasonic transducer which oscillates outside the resonant frequency.
  • a piezoceramic ultrasonic transducer which oscillates at a resonant frequency likewise has a lower electrical excitation power than a piezoceramic ultrasonic transducer which oscillates outside the resonant frequency, but rises due to the coupling of the piezoceramic Module to a component, the neces- table electrical excitation power against a coupled to air piezoceramic ultrasonic transducer.
  • the piezoceramic element and thus the piezoceramic module from the outset depending on the structure on a certain power requirements. Due to the structure of the piezoceramic element and thus of the piezoceramic module, the operation outside a self-resonant point is already expected to increase the power requirement due to the design.
  • the air-coupled ultrasonic transducers in use operate at electrical excitation frequencies in a range of 20 kHz to 200 kHz.
  • a piezoceramic element is simultaneously used both as an actuator and as a sensor in a device.
  • the actuator and sensor it is of course also possible to design the actuator and sensor in different devices and to send them via at least one device and to receive them via at least one other device.
  • actuator and sensor When using the actuator and sensor in separate devices, these can each have the same structure or else have different piezoceramic element designs, in order to make optimum use of, for example, the different transmission or reception characteristics.
  • ultrasonic sensor always means an ultrasonic transmitter and / or receiver.
  • the actuator and / or sensor as piezoceramic element is a composite of at least one piezoceramic fiber and / or at least one piezoceramic rod and / or at least one piezoceramic film (plate) with other materials, such as plastics or metals such as aluminum, educated.
  • This piezoceramic element produced as a composite is formed into a surface module in that flat, thin elements are formed which consist of piezoceramic foils or piezoceramic wands or piezoceramic fibers in combination with other materials. are built and by electrodeposition, contacting and isolation yield a usable piezoceramic module.
  • This piezoceramic element produced as a composite can also be formed into a volume module as a volume element, in that piezoceramic films, piezoceramic rods or piezoceramic fibers are more voluminous in combination with other materials - resulting in a not only flat, thin body - are constructed and result in an insertable piezoceramic module by electrodation, contacting and insulation.
  • the modules can be electrically contacted with a planar electrode or an interdigital electrode.
  • the associated electronics are preferably arranged close to the sensor, but can also be arranged remote sensor in a further embodiment.
  • An ultrasonic sensor thus has at least one piezoceramic element as an actuator and / or sensor and can be integrated in a component or on a back side of the component such that the oscillating piezoelectric ceramic module excites the component to vibrate, which in turn vibrates radiates in / to the environment and / or finally transmits the vibrations arriving from the environment via the excited component to the piezoceramic module.
  • connection between the component and piezoceramic module is designed such that only a part of the component [subregion] in which the piezoceramic module is integrated or applied is excitable by the emitted and / or received vibrations.
  • a mechanical impedance difference between the component and the subregion of the component, which is to be excited by the emitted and / or received vibrations can be achieved by decoupling between piezoceramic module and component itself.
  • the mechanical impedance difference by the variation of stiffness and / or mass of the portion of the component relative to the component is adjustable.
  • the mechanical impedance difference is adjustable in a first embodiment, for example, by the variation of stiffness and / or mass by stiffening layers between piezoceramic module and the portion of the component, which is to be excited by the emitted and / or received vibrations, can be arranged.
  • the mechanical impedance difference is adjustable in a second embodiment by the variation of stiffness and / or mass, by at the back in the partial region of the component, which is to be excited by the emitted and / or received vibrations, a ribbed to the component ribbed around the piezoceramic Module is executed around as a mechanical impedance jump.
  • the shape, size and stiffness - e.g. by the variation of area, thickness and curvature - of the piezoceramic module and its shape, size and rigidity of the coupling to the bumper - e.g. by selecting the stiffening position, area, thickness and curvature - be determined.
  • a bumper or the like As a component in or on which an inventive ultrasonic sensor is arranged, for example, a bumper or the like is provided.
  • plastic and fiber-reinforced plastic for example, glass or carbon fibers
  • all attachments made of plastic and fiber-reinforced plastic such as bumpers, bumpers, door guards, side guards, spoilers, license plates, door handles or exterior mirror housings are eligible components.
  • the inventive ultrasonic sensors should be applied in the non-visible region or be constructed of a transparent piezoceramic.
  • the inventive ultrasonic sensor can be applied to the back of the mirror.
  • the ultrasonic sensor according to the invention is also applied or integrated on or in cast iron or extruded structures of, for example, aluminum or magnesium in the area of the supporting structure of the body or else in the unit or chassis area.
  • the mechanical impedance matching must take place via the variation of stiffness and / or mass or also a corresponding design of a surrounding ribbing.
  • Piezoceramic elements are therefore used as actuators and / or sensors of an ultrasonic sensor for the new technology.
  • These elements also used in ultrasound technology in the underwater area (sonar) produce a thickness vibration in the molding.
  • the piezo fibers are aligned in parallel. When electrically controlled, the position of the fibers changed simultaneously, so that a thickness vibration takes place on a radiation in the fiber longitudinal direction.
  • the frequency of the oscillator can be adjusted via fiber diameter and fiber volume content.
  • piezoceramic modules are constructed either from piezoceramic foils (plates), rods or fibers. These are electrically contacted via a planar electrode or interdigital electrode. In planar application of the element, a bending deformation and / or a thickness vibration is introduced into the structural component.
  • the frequency of the radiation can be determined by the basic stiffness of the structural component as well as by size and structure of the piezoelectric element set.
  • Bulky piezoceramic modules are also constructed either from piezoceramic foils or from piezoceramic rods or fibers. However, these are also electrically contacted via a planar electrode or interdigital electrode. With voluminous application of the element, a small bending deformation but above all a thickness oscillation is likewise introduced into the structural component. The frequency of the radiation can be adjusted by the basic rigidity of the structure as well as the size and structure of the piezoelectric element.
  • the piezoceramic elements described here or the formed piezoceramic modules can be applied in or behind, for example, a bumper made of a plastic.
  • the piezoceramic elements or piezoceramic modules are not visually visible the assembly (especially in painted bumpers) is significantly simplified there is a higher freedom of design, the elements no longer optical
  • the planar piezoceramic modules for example, integrated in the plastic or applied to the back of the bumper and thus excited the bumper on the piezoceramic modules for emitting the ultrasound.
  • They To decouple the individual modules, they must each be connected in such a way that they excite only a small area of the bumper area to vibrate. This can be set constructively via a mechanical impedance difference (variation of stiffness and / or masses) between the areas where a piezo element is integrated or applied and the remaining area of the bumper.
  • thin stiffening layers for example, thin sheet metal
  • a glued additional ribbing around the element as a mechanical impedance jump is conceivable. Partial weakening in the plastic thickness of the bumper are only possible, as long as they are not visually apparent from the outside.
  • the piezoelectric elements can be electrically driven and operated at the resonance frequency or else outside the resonance frequency.
  • the mechanical structure of the ultrasonic sensor according to the invention and the basic structure is adjusted and adapted in the mechanical impedance so that it resonates at the desired ultrasonic frequency.
  • a high ultrasonic pressure can be generated with low electrical excitation power.
  • the system When designed in non-resonant mode, the system operates at an ultrasonic frequency outside the resonant frequency. Here an adapted higher electrical power is necessary to produce the appropriate range. However, the influence of the above-mentioned disturbances on the quality of the ultrasonic signals is no longer so great.
  • the ultrasonic sensor according to the invention is used for object detection and distance measurement and can be used in all applications, such as the previous known ultrasonic sensors also.
  • piezoceramic modules could be used to generate an audible warning sound prescribed in some countries when reversing.
  • the elements or modules used would work as speakers in an audible frequency band
  • the ultrasonic sensors distributed on a component can serve as contact force sensor (s) in the event of a crash.
  • a component for example the bumper
  • Such an ultrasonic sensor can be used to detect a crash via the object detection and distance measurement as a precrash sensor and at the same time as a contact force sensor as a crash sensor.
  • FIG. 1 shows an example in a sectional view of the mechanical structure of a Verrip- pung - second embodiment variant - to adapt the mechanical impedance of the piezoceramic module - against the component;
  • FIG. 1 piezoceramic fiber composite (composite) elements
  • FIG. 4 piezoceramic module in d31 design in a schematic representation.
  • Figure 1 shows a second embodiment in which a piezoceramic module 20 on the back of a component 30, for example, on the back of a bumper was applied.
  • a mechanical impedance difference between the remaining region of the bumper 30 and the portion 100 of the bumper 30 ( Figure 1), which is to be excited by the emitted and / or received vibrations, by a decoupling between the piezoceramic module 20 and the remaining area of the bumper 30 reachable.
  • a size of the mechanical impedance difference is adjustable in the second embodiment by the variation of the rigidity, by at the back in the portion 100 of the bumper 30, which is to be excited by the emitted and / or received vibrations, bonded to the bumper 30 ribbing 50, around the piezoceramic module 20 around, thereby producing a predeterminable mechanical impedance jump in the bumper 30 is executed.
  • an adhesive layer for attaching the ribbing 50, wherein the adhesive layer between the piezoceramic module ⁇ 20 and the ribbing 50 is formed in an adhesive joint 40.
  • the self-shape 60 of the bumper 30 changes in the excitation case of the piezoceramic element 10A, 10B of the piezoceramic module 20 by the glued ribbing 50 only in the partial area 100.
  • the ribbing 50 in this partial area 100 is a mechanical impedance difference or impedance jump around the Piezoceramic module 20 around the remaining area of the bumper is adjustable.
  • the mass of the bumper 30 is changed in this partial region 100, for example by a thicker or thinner design of the material of the bumper 30 (not shown) compared with the material thickness of the bumper 30 in the remaining region This also achieves the desired mechanical impedance difference or impedance jump for adjusting the piezoceramic module 20.
  • the measures stiffness change and mass change of the component 30 can be executed individually or in combination.
  • the ribbing 50 used is, for example, a carbon fiber box which forms a partial ribbing 50 or circumferential ribbing 50 around the piezoceramic module 20, so that the rigidity of the bumper 30 can be changed in this area and thereby the mechanical impedance jump between the bumper 30 in the remaining area and the bumper 30 in the sub-area 100 makes adjustable.
  • the arrangement of stiffening layers (not shown), for changing the rigidity of the component in the partial area 100 relative to the remaining area of the bumper preferred.
  • a thin, planar piezoceramic module 2OA as well as a voluminous piezoceramic module 2OB, can be arranged.
  • the piezoceramic modules 2OA, 2OB differ in terms of the bending deformation and / or thickness vibration (deflection) that can be generated, which is / are introduced into the component 30 predominantly in the partial area 100.
  • FIG. 2 shows such different piezoceramic modules, the piezoceramic modules 2OA shown with the reference numeral 2OA showing thin planar modules and the voluminous piezoceramic modules 2OB representing the reference numeral 2OB.
  • FIG. 2 illustrates, different geometric shapes of the piezoceramic elements 10A, 10B can be produced both for planar and voluminous piezoceramic modules 20A, 20B (not shown in the planar piezoceramic modules 20A).
  • these piezoceramic elements 10A, 10B form the corresponding piezoceramic modules 20A, 20B with the properties desired for piezoceramic modules.
  • FIG. 3 shows that piezoceramic modules 2OA, 2OB are direction-dependent with regard to the piezoelectric effect because of the anisotropic nature of piezoceramic.
  • the axes 1, 2 and 3 are introduced (analogous to the x, y and z axes of the Cartesian coordinate system).
  • the polarization direction (axis 3) is determined during polarization by an electric field (between the polarizing electrodes).
  • the piezo properties in this direction are usually the most important. Here is the biggest deflection.
  • FIG. 3 schematically shows a piezoceramic module 20 made of piezoceramic elements 10 and interposed composite material 70 with the tensor d33.
  • D33 describes the piezoceramic modulus material properties in terms of strain (deflection) parallel to the polarization vector of the ceramic (thickness).
  • an electric field is applied in the direction of polarization (axis 3) and the strain takes place in the same direction (axis 3).
  • FIG. 4 schematically shows a piezoceramic module 20 made of piezoceramic elements 10 and interposed composite material 70 with the tensor d31.
  • D31 describes the piezoceramic modulus material properties in terms of contraction (deflection) as a geometry change orthogonal to the polarization of the ceramic (width).
  • an electric field is applied in the direction (axis 3), but the deflection takes place in the direction of the axis 1 (that is, orthogonal to the polarization axis).
  • the +/- electrodes 80 are in the embodiment of the figure 4 electrically connected via each top and bottom of the piezoceramic module 20 arranged metallic electrode layers 90 together.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

Émetteur et/ou récepteur d'ultrasons (capteur à ultrasons) comprenant un actionneur pour l'émission et/ou un capteur pour la réception d'oscillations, et une électronique associée pour la production et/ou l'évaluation desdites oscillations. L'invention est caractérisée en ce que l'actionneur pour l'émission, qui excite un composant (30) pour l'oscillation et/ou le capteur pour la réception, est un élément piézocéramique (10) ayant une capacité d'actionnement et/ou de détection prédéterminée, logé dans un module piézocéramique (20) lequel peut être intégré audit composant (30) de manière invisible de l'extérieur, ou peut être appliqué sur ce composant (30).
PCT/EP2008/002797 2007-04-12 2008-04-09 Capteur à ultrasons invisible Ceased WO2008125260A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007017570 2007-04-12
DE102007017570.3 2007-04-12

Publications (1)

Publication Number Publication Date
WO2008125260A1 true WO2008125260A1 (fr) 2008-10-23

Family

ID=39672155

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/002797 Ceased WO2008125260A1 (fr) 2007-04-12 2008-04-09 Capteur à ultrasons invisible

Country Status (2)

Country Link
DE (1) DE102008018110B4 (fr)
WO (1) WO2008125260A1 (fr)

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DE102011102202A1 (de) 2011-05-21 2012-11-22 Volkswagen Aktiengesellschaft Umfelderfassungsvorrichtung in einem Kraftfahrzeug und Verfahren zur Umfelderfassung unter Ausnutzung einer Korrelation
DE102011108444A1 (de) 2011-07-23 2013-01-24 Volkswagen Aktiengesellschaft Ultraschallsensoranordnung für einen verdeckt an einem Straßenfahrzeug eingebauten Ultraschallwandler sowie Verfahren zu dessen Anbringung
DE102015122417A1 (de) 2015-12-21 2017-06-22 Valeo Schalter Und Sensoren Gmbh Ultraschallsensorvorrichtung mit einer zumindest bereichsweise flexiblen Leiterplatte, Ultraschallsensoranordnung und Kraftfahrzeug

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DE102009040264A1 (de) 2009-09-04 2011-03-10 Volkswagen Ag Verfahren und Vorrichtung zur Erzeugung oder zum Empfang von Ultraschallwellen sowie Ultraschallmessvorrichtung und Fahrzeug
DE102010027780A1 (de) * 2010-04-15 2011-10-20 Robert Bosch Gmbh Verfahren zum Ansteuern eines Ultraschallsensors und Ultraschallsensor
DE102010025194B4 (de) * 2010-06-26 2021-03-25 Volkswagen Ag Ultraschallwandler, Anordnung eines Ultraschallsensors in einem Kunststoffbauteil eines Kraftfahrzeugs und Herstellung der Anordnung
DE102010047707A1 (de) 2010-10-06 2012-04-12 Volkswagen Ag Verfahren zur Verbindung eines elektroakustischen Wandlers mit einer Haltevorrichtung für diesen und Haltevorrichtung zur Durchführung des Verfahrens
DE102010064036A1 (de) * 2010-12-23 2012-06-28 Robert Bosch Gmbh Vorrichtung zur Erfassung des Abstandes eines Kraftfahrzeugs zu einem Objekt
DE102011077352A1 (de) * 2011-06-10 2012-12-13 Robert Bosch Gmbh Sensoranordnung eines Sensorsystems einer fahrbaren Plattform sowie Sensorsystem
DE102012208059B4 (de) * 2012-05-14 2022-05-12 Robert Bosch Gmbh Trägerelement mit integrierter Sensoreinheit
DE102012106695A1 (de) 2012-07-24 2014-01-30 Volkswagen Ag Ultraschallsensoranordnung mit einer zerstörungsfreien Reparaturlösung, Kraftfahrzeug und entsprechendes Verfahren
DE102012106700A1 (de) 2012-07-24 2014-01-30 Valeo Schalter Und Sensoren Gmbh Ultraschallsensoranordnung mit einem Zwischenelement, Vorrichtung und Verfahren zum Herstellen einer Ultraschallsensoranordnung für ein Kraftfahrzeug
DE102012106697A1 (de) 2012-07-24 2014-01-30 Volkswagen Ag Ultraschallsensoranordnung mit einem Versteifungshalter, Anordnung, Kraftfahrzeug und entsprechendes Verfahren
DE102012109838A1 (de) 2012-10-16 2014-04-17 Volkswagen Ag Ultraschallsensorvorrichtung mit einer Versteifungseinheit, Anordnung, Kraftfahrzeug und Verfahren zum Herstellen einer Anordnung
DE102012020411A1 (de) * 2012-10-18 2014-04-24 Volkswagen Aktiengesellschaft Schließsystem für ein Kraftfahrzeug
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DE102013225872A1 (de) 2013-12-13 2015-07-02 Robert Bosch Gmbh Karosserieteil für ein Kraftfahrzeug

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011102202A1 (de) 2011-05-21 2012-11-22 Volkswagen Aktiengesellschaft Umfelderfassungsvorrichtung in einem Kraftfahrzeug und Verfahren zur Umfelderfassung unter Ausnutzung einer Korrelation
WO2012159703A1 (fr) 2011-05-21 2012-11-29 Volkswagen Aktiengesellschaft Dispositif de détection de l'environnement placé dans un véhicule automobile et procédé de détection de l'environnement utilisant une corrélation
CN103703388A (zh) * 2011-05-21 2014-04-02 大众汽车有限公司 利用相关检测机动车的周围环境的装置和方法
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DE102011108444A1 (de) 2011-07-23 2013-01-24 Volkswagen Aktiengesellschaft Ultraschallsensoranordnung für einen verdeckt an einem Straßenfahrzeug eingebauten Ultraschallwandler sowie Verfahren zu dessen Anbringung
DE102015122417A1 (de) 2015-12-21 2017-06-22 Valeo Schalter Und Sensoren Gmbh Ultraschallsensorvorrichtung mit einer zumindest bereichsweise flexiblen Leiterplatte, Ultraschallsensoranordnung und Kraftfahrzeug
WO2017108494A1 (fr) 2015-12-21 2017-06-29 Valeo Schalter Und Sensoren Gmbh Dispositif de détection par ultrasons muni d'une carte de circuit imprimé flexible au moins par endroits, système de détection par ultrasons et véhicule automobile

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DE102008018110B4 (de) 2022-10-06
DE102008018110A1 (de) 2008-10-16

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