EP3170171A1 - Dispositif de capteur ultrasonique pour un véhicule automobile, système d'assistance à la conduite ainsi que véhicule automobile - Google Patents

Dispositif de capteur ultrasonique pour un véhicule automobile, système d'assistance à la conduite ainsi que véhicule automobile

Info

Publication number
EP3170171A1
EP3170171A1 EP15736451.4A EP15736451A EP3170171A1 EP 3170171 A1 EP3170171 A1 EP 3170171A1 EP 15736451 A EP15736451 A EP 15736451A EP 3170171 A1 EP3170171 A1 EP 3170171A1
Authority
EP
European Patent Office
Prior art keywords
adjusting device
ultrasonic sensor
sensor device
control electronics
ultrasonic
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.)
Withdrawn
Application number
EP15736451.4A
Other languages
German (de)
English (en)
Inventor
Paul-David Rostocki
Heinrich Gotzig
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
Application filed by Valeo Schalter und Sensoren GmbH filed Critical Valeo Schalter und Sensoren GmbH
Publication of EP3170171A1 publication Critical patent/EP3170171A1/fr
Withdrawn legal-status Critical Current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
    • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88—Sonar systems specially adapted for specific applications
    • G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
    • G01S15/931—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
    • G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
    • G10K9/22—Mountings; Casings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88—Sonar systems specially adapted for specific applications
    • G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
    • G01S15/931—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G01S2015/932—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles for parking operations

Definitions

  • Ultrasonic sensor device for a motor vehicle, driver assistance system and
  • the present invention relates to an ultrasonic sensor device for a motor vehicle with an ultrasonic diaphragm, with an adjusting device, by means of which the
  • Ultrasonic diaphragm for emitting an ultrasonic signal is movable and with an electronic control unit for driving the adjusting device.
  • the invention also relates to a driver assistance system having such an ultrasonic sensor device.
  • the present invention relates to a motor vehicle with such a driver assistance system.
  • Ultrasonic signal generated which is reflected by an object. Based on the transit time of the reflected ultrasound signal, the distance to the object can be determined with the ultrasound sensor device.
  • the ultrasonic sensors that are currently installed in motor vehicles include an ultrasonic membrane, which may be part of a cup-shaped structure, for example.
  • This membrane is excited with an adjusting device, which is usually designed as a piezoelectric actuator, to vibrations in the ultrasonic range.
  • a corresponding control electronics is used, which may include an integrated circuit, a transformer and other components.
  • the adjusting device or the actuator and the control electronics are usually arranged in a housing.
  • a shield plate may be provided for electromagnetic shielding.
  • An ultrasonic sensor comprising a diaphragm and a piezoelectric element disposed close to the diaphragm.
  • the piezoelectric element is contacted with electronics that control the piezoelectric element. Between the electronics and the piezoelectric element, a damping layer is provided. It is an object of the present invention to provide a solution, such as a
  • Ultrasonic sensor device for a motor vehicle space saving and reliable can be configured.
  • control electronics is designed as an integrated circuit and is arranged directly on the adjusting device.
  • the present invention is based on the finding that the installation space of an ultrasonic sensor device for a motor vehicle can be reduced by designing the control electronics as an integrated circuit and directly on the
  • the control electronics is not arranged in particular on an additional board.
  • the control electronics can be formed on a substrate, in particular a semiconductor substrate.
  • the control electronics can be designed as a so-called application-specific integrated circuit (ASIC).
  • ASIC application-specific integrated circuit
  • the control electronics can be arranged for example in a separate housing. It can also be provided that the control electronics corresponding electrical contact elements for electrical
  • the adjusting device and the control electronics are connected to each other at least partially cohesively.
  • the control electronics are connected to each other at least partially cohesively.
  • Adjusting device and the control electronics to be interconnected by an adhesive method.
  • a damping layer is arranged between the adjusting device and the control electronics, which serves to transmit mechanical vibrations that occur during operation of the adjusting device to the control electronics.
  • the ultrasound sensor device can be configured in a particularly space-saving and cost-effective manner.
  • the control electronics on electrical contact elements, which are connected by soldering with corresponding connection elements of the adjusting device.
  • the control electronics may, for example, corresponding pins or legs have that can be soldered to corresponding contact pads of the actuator.
  • Ultrasonic sensor device are made more robust, for example, no cable breakage can occur.
  • control electronics electrical
  • connection elements of the actuating device are connected.
  • the adjusting device and the control electronics can be electrically connected to one another, for example, by means of a wire bonding method.
  • the adjusting device and the control electronics can be electrically connected to one another, for example, by means of a wire bonding method.
  • the adjusting device and the control electronics can be electrically connected to one another, for example, by means of a wire bonding method.
  • Control electronics are electrically interconnected by chip bonding or die bonding.
  • the control electronics and the adjusting device are mechanically connected to each other. This can be done for example by a
  • Adhesive connection can be enabled. Thus, a reliable electrical connection
  • Connection between the control electronics and the adjusting device can be provided.
  • the adjusting device comprises a piezoelectric transducer.
  • the piezoelectric transducer can be arranged directly on the ultrasound membrane. On the opposite side of the ultrasonic membrane can then
  • Control electronics are arranged on the piezoelectric transducer.
  • the control electronics can be arranged directly on the piezoelectric transducer or the adjusting device.
  • the piezoelectric transducer can be dispensed with a circuit board.
  • cables that serve the electrical connection between the board and the actuator can be saved.
  • the adjusting device is designed as a micromechanical component.
  • the adjusting device can therefore by a microtechnical
  • the adjusting device may be made of a substrate, in particular a semiconductor material.
  • Adjusting device may in this case have a corresponding movement element which is mechanically coupled to the ultrasound membrane.
  • Movement element can be moved, for example, piezoelectric or electrostatic.
  • the adjusting device may be designed as an electro-thermo-mechanical converter or as an electro-magneto-mechanical converter.
  • Micromechanical components can be manufactured in large quantities and are therefore cost-effective.
  • the adjusting device and the control electronics are formed on a common substrate.
  • the substrate may be, for example, a semiconductor material, in particular silicon.
  • the control electronics and the microelectronic and microtechnical manufacturing process are formed on the substrate.
  • Adjusting device are manufactured. Thus, a particularly space-saving arrangement can be achieved and on the other hand, it requires no additional electrical
  • the setting device is designed to detect a movement of the ultrasound membrane.
  • the ultrasonic membrane is excited to mechanical vibration. This can be detected with the adjusting device.
  • the actuator comprises a piezoelectric element
  • Ultrasonic diaphragm can be directly converted into an electrical signal. Furthermore, it may be provided that the adjusting device additionally comprises a measuring unit for detecting the oscillation of the ultrasonic membrane. In this way, the ultrasonic wave reflected from the object can be reliably detected.
  • the ultrasonic sensor device has a housing in which the adjusting device is arranged, wherein a region of the housing forms the ultrasonic diaphragm. It is also preferably provided that the
  • Control electronics is arranged in the housing.
  • the housing may for example be cup-shaped and made of aluminum.
  • a region of the aluminum pot can form the ultrasound membrane.
  • the ultrasonic sensor device has an electrical connection device, which is electrically connected to the actuating device.
  • This connection device can for example be designed as a socket, which is mechanically connected to the housing of the ultrasonic sensor device.
  • Connection device can also be provided to provide a connection to a data line of the ultrasonic sensor device.
  • the driver assistance system according to the invention comprises an inventive
  • the driver assistance system may be, for example, a distance warning device or support the driver when parking or parking.
  • the motor vehicle according to the invention comprises the inventive
  • the motor vehicle is designed in particular as a passenger car.
  • 1 is a schematic representation of an ultrasonic sensor device according to the prior art; and 2 shows an ultrasonic sensor device according to an embodiment of the present invention in a schematic representation.
  • Fig. 1 shows an ultrasonic device 1 according to the prior art in a sectional side view.
  • the ultrasonic sensor device 1 is for use in a motor vehicle.
  • the ultrasound sensor device 1 can be part of a driver assistance system that assists the driver when parking.
  • the ultrasonic sensor device 1 comprises an ultrasonic membrane 13.
  • the ultrasonic membrane 13 is part of an aluminum pot 2.
  • the ultrasonic membrane 13 is thus disk-shaped and held by the side walls of the aluminum pot 2.
  • the ultrasonic diaphragm 13 may be formed to have a resonance frequency between 40 kHz and 60 kHz.
  • the ultrasonic sensor device 1 comprises a control device 3.
  • the control device 3 serves to control the ultrasound membrane 13.
  • the ultrasonic sensor device 1 comprises an adjusting device 4.
  • the adjusting device 4 is formed as a piezoelectric element, the a rear side 14 of the ultrasonic membrane 13 is arranged.
  • the piezoelectric element or the adjusting device 4 deforms. This has the consequence that the ultrasonic diaphragm 13 is set into mechanical oscillations. Thus, an ultrasonic signal can be sent out.
  • the ultrasonic sensor device 1 also comprises an electronic control unit 5, which is arranged on a circuit board 6 or a printed circuit board.
  • the circuit board 6 is connected to an electrical connection device 7, which in the present
  • Embodiment is designed as a socket.
  • Connection device 7 can be an electrical connection between the
  • a capacitor 10 which is designed in particular as an electrolytic capacitor, is arranged on the circuit board 6.
  • electrical energy can be stored.
  • a transformer 9 is arranged on the circuit board 6, by means of which the electrical voltage, which is obtained from the motor vehicle electrical system, can be converted to drive the adjusting device 4.
  • the ultrasonic sensor device additionally comprises a housing 8, which may be made of plastic, for example.
  • the electrical connection device 7 is held on the housing 8.
  • a shield plate 1 1 is provided, which serves to prevent the penetration of electromagnetic interference in the housing 8.
  • Fig. 2 shows an ultrasonic sensor device 1 according to an embodiment of the invention.
  • the control device 3 comprises the adjusting device 4 and an electronic control unit 12 which is designed as a chip or integrated circuit.
  • the complete circuit for controlling the adjusting device 4 is designed as an integrated circuit or application-specific integrated circuit.
  • the integrated circuit or the control electronics 12 may be formed on a single substrate, for example a semiconductor substrate.
  • the adjusting device 4 may comprise, for example, a piezoelectric transducer. This piezoelectric transducer is directly on the back 14 of
  • Ultrasonic diaphragm 13 is arranged. On the ultrasound membrane 13
  • control electronics 12 is arranged opposite side of the adjusting device 4, the control electronics 12 is arranged.
  • the control electronics is formed as an integrated circuit, wherein the circuit comprises a plurality of electronic components, which by a microelectronic
  • Manufacturing process are made on a substrate.
  • a substrate material for example, a semiconductor material can be used.
  • the control electronics may have a corresponding housing or a potting compound, in which the chip or integrated circuit is arranged.
  • the control electronics 12 can therefore be used without additional board 6.
  • the control electronics 12 is a separate component.
  • connection elements may be provided, which are for electrical connection to the electrical
  • connection element 7 may be electrically connected to the control electronics by means of appropriate cables or bonding wires.
  • control electronics 12 may have corresponding contact elements which can be soldered directly to corresponding contact elements of the adjusting device 4.
  • connection between the actuator 4 and the control electronics 12 are provided. Instead of a solder joint, a corresponding bond connection can also be provided.
  • the adjusting device 4 and the control electronics 12 may additionally or alternatively be materially interconnected. When the adjusting device 4 is moved during the transmission operation of the ultrasonic sensor device 1, usually amplitudes of a few micrometers, for example 5 micrometers occur.
  • Control electronics 12 are not affected in their operation.
  • the adjusting device 4 can also be designed as a micromechanical component or as a MEMS component.
  • the adjusting device 4 may comprise, for example, a moving element which is designed as a membrane or as a bending beam. This
  • Movement element may be formed, for example, of a semiconductor element.
  • the moving element may be formed of a ceramic, a plastic or other materials.
  • a piezoelectric element may be arranged on this movement element.
  • the piezoelectric element may for example be applied as a layer on the moving element.
  • An electrical voltage can be applied to the piezoelectric element.
  • the piezoelectric element may deform.
  • the piezoelectric element may be formed such that the longitudinal effect or the transverse effect is used.
  • Movement element has a direct mechanical connection with the
  • Ultrasonic diaphragm 13 whereby it can be moved.
  • the adjusting device 4 is designed as an electrostatic transducer. In this case, for example, two plates or
  • Be provided electrodes of which at least one is designed to be movable and to which an electrical voltage can be applied.
  • an electric field for example, one of the plate can be moved, which is mechanically coupled to the ultrasound membrane.
  • a plate arrangement for example, a corresponding comb structure or the like can be used.
  • the adjusting device 4 is designed as an electro-thermo-mechanical converter.
  • the adjusting device 4 is designed in this case to convert electrical energy, which is applied for example in the form of an electrical voltage to the adjusting device, into thermal energy or heat.
  • the adjusting device can be designed such that, as a result of the heating, a mechanical deformation of a moving element results, which depends on the ultrasonic membrane 13 acts.
  • the adjusting device 4 may in this case, for example, have a bimetal arrangement comprising two different materials having different thermal expansion coefficients.
  • Shape memory alloy includes. such
  • shape memory alloys can assume a predetermined shape upon heating.
  • the adjusting device 4 may be formed as an electro-magnetic-mechanical converter.
  • the force which serves to move the ultrasound membrane 13 can be provided as a result of the Lorenz force.
  • a current through which a current flows can provide a magnetic field in which a
  • Movement element is located, which is moved accordingly.
  • the reluctance principle is used.
  • the adjusting device 4 may also have a corresponding micromechanically manufactured coil which provides a magnetic field through which a moving element can be moved.
  • the adjusting device is designed as a micromechanical motor or drive.
  • the control electronics 12 is in the present embodiment on the
  • Ultrasonic diaphragm 13 opposite side of the adjusting device 4 is arranged. It can also be provided that the adjusting device 4 together with the
  • the adjusting device 4 can in particular also be designed to detect a mechanical movement or oscillation of the ultrasonic diaphragm 13. Thus, the ultrasonic wave reflected from an object can be detected again. It can also be provided that the control electronics 12 to detect or process an electrical signal which is provided by the adjusting device 4 as a result of the movement of the ultrasonic diaphragm 13.
  • control electronics 12 is disposed within the aluminum pot 2, which serves the electromagnetic shielding of the control electronics 12. It is also conceivable that he aluminum pot 2 at least partially as a housing for the
  • Ultrasonic sensor device 1 is used. Thus, for example, can be dispensed with the shielding plate 1 1.
  • Adjustment device 4 are required.
  • the transformer 9 and / or the capacitor 10 can be dispensed with.
  • an adjusting device 4 which is designed as a micromechanical component, are manufactured in large numbers and thus cost.
  • a shorter settling time of the adjusting device 4 or of the composite of adjusting device 4 and ultrasonic diaphragm 13 may result, since the adjusting device 4 is actively activated.

Landscapes

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

Abstract

L'invention concerne un dispositif de capteur ultrasonique (1) destiné à un véhicule automobile et comprenant : une membrane ultrasonique (13) ; un organe de réglage (4) au moyen duquel la membrane ultrasonique (13) peut être déplacée afin d'émettre un signal ultrasonique ; et un moyen électronique de commande (12) pour la commande de l'organe de réglage (4). Le moyen électronique de commande (12) est réalisé sous la forme d'un circuit intégré et est disposé directement sur l'organe de réglage (4).
EP15736451.4A 2014-07-18 2015-07-08 Dispositif de capteur ultrasonique pour un véhicule automobile, système d'assistance à la conduite ainsi que véhicule automobile Withdrawn EP3170171A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014110179.0A DE102014110179B4 (de) 2014-07-18 2014-07-18 Ultraschallsensorvorrichtung für ein Kraftfahrzeug, Fahrerassistenzsystem sowie Kraftfahrzeug
PCT/EP2015/065584 WO2016008781A1 (fr) 2014-07-18 2015-07-08 Dispositif de capteur ultrasonique pour un véhicule automobile, système d'assistance à la conduite ainsi que véhicule automobile

Publications (1)

Publication Number Publication Date
EP3170171A1 true EP3170171A1 (fr) 2017-05-24

Family

ID=53541659

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15736451.4A Withdrawn EP3170171A1 (fr) 2014-07-18 2015-07-08 Dispositif de capteur ultrasonique pour un véhicule automobile, système d'assistance à la conduite ainsi que véhicule automobile

Country Status (4)

Country Link
US (1) US20170160386A1 (fr)
EP (1) EP3170171A1 (fr)
DE (1) DE102014110179B4 (fr)
WO (1) WO2016008781A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016122742A1 (de) 2016-11-25 2018-05-30 Valeo Schalter Und Sensoren Gmbh Ultraschallsensorvorrichtung für ein Kraftfahrzeug mit zwei verschiedenen Wandlereinrichtungen, Sensoranordnung, Fahrerassistenzsystem, Kraftfahrzeug sowie Verfahren
DE102017115493B4 (de) 2017-07-11 2019-02-14 Valeo Schalter Und Sensoren Gmbh Elektrische Verbindungseinrichtung für einen Ultraschallsensor eines Kraftfahrzeugs, Verfahren zum Herstellen eines Ultraschallsensors, Ultraschallsensor sowie Kraftfahrzeug
KR20240023885A (ko) * 2022-08-16 2024-02-23 현대모비스 주식회사 초음파 센서 및 그 제조방법
DE102022211671A1 (de) 2022-11-04 2024-05-08 Robert Bosch Gesellschaft mit beschränkter Haftung Signalübertragende Struktur, die insbesondere selektiv elastomechanisch ausgeführt ist, für ein Fahrzeugmodul, Fahrzeugmodul und Verfahren zur Herstellung des Fahrzeugmoduls

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6589180B2 (en) * 2001-06-20 2003-07-08 Bae Systems Information And Electronic Systems Integration, Inc Acoustical array with multilayer substrate integrated circuits
JP4715236B2 (ja) * 2005-03-01 2011-07-06 株式会社デンソー 超音波センサ装置
JP4645436B2 (ja) * 2005-12-22 2011-03-09 株式会社デンソー 超音波センサ
JP4412367B2 (ja) * 2007-08-21 2010-02-10 株式会社デンソー 超音波センサ
DE102008027970B4 (de) 2008-06-12 2013-04-04 Hella Kgaa Hueck & Co. Ultraschallsensor
US8207652B2 (en) * 2009-06-16 2012-06-26 General Electric Company Ultrasound transducer with improved acoustic performance

Also Published As

Publication number Publication date
DE102014110179B4 (de) 2021-06-17
US20170160386A1 (en) 2017-06-08
WO2016008781A1 (fr) 2016-01-21
DE102014110179A1 (de) 2016-01-21

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