WO2017005686A1 - Capteur à ultrasons pour un véhicule automobile, véhicule automobile ainsi que procédé de fabrication d'un capteur à ultrasons - Google Patents

Capteur à ultrasons pour un véhicule automobile, véhicule automobile ainsi que procédé de fabrication d'un capteur à ultrasons Download PDF

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Publication number
WO2017005686A1
WO2017005686A1 PCT/EP2016/065696 EP2016065696W WO2017005686A1 WO 2017005686 A1 WO2017005686 A1 WO 2017005686A1 EP 2016065696 W EP2016065696 W EP 2016065696W WO 2017005686 A1 WO2017005686 A1 WO 2017005686A1
Authority
WO
WIPO (PCT)
Prior art keywords
membrane
ultrasonic sensor
wall segments
diaphragm
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.)
Ceased
Application number
PCT/EP2016/065696
Other languages
German (de)
English (en)
Inventor
Hans-Wilhelm Wehling
Wolfgang Hamm
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
Priority to EP16734398.7A priority Critical patent/EP3320363A1/fr
Publication of WO2017005686A1 publication Critical patent/WO2017005686A1/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
    • 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
    • G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
    • G10K9/22—Mountings; Casings

Definitions

  • Ultrasonic sensor for a motor vehicle, motor vehicle and method for producing an ultrasonic sensor
  • the invention relates to an ultrasonic sensor for a motor vehicle with a cup-shaped membrane comprising a membrane bottom and a membrane wall, wherein the
  • Ultrasonic sensor for emitting and / or receiving ultrasonic signals is formed over the diaphragm bottom.
  • the invention also relates to a motor vehicle having at least one ultrasonic sensor and to a method for producing a motor vehicle
  • Ultrasonic sensors or ultrasonic transducers for motor vehicles are already known from the prior art and can be used, for example, to detect objects in an environmental region of the motor vehicle.
  • an ultrasound signal is emitted by the ultrasound sensors and the ultrasound signal reflected by the object is received again by the ultrasound sensor.
  • Information about a detected object for example, a distance of the object to the motor vehicle, can thereby a driver assistance system of the motor vehicle, for example a
  • an ultrasonic sensor shown which can be operated at different frequencies, so that different ultrasonic sensors can emit signals simultaneously or with very short time intervals, which can be easily separated again.
  • the ultrasound transducers usually have diaphragms which are excited to vibrate.
  • the vibration energy can be provided, for example, by a transducer element, for example a piezoelement.
  • the ultrasonic sensor should be designed so that the vibration energy is emitted to transmit as lossless as possible to the surrounding area. However, the ultrasonic sensor should also be able to quickly reduce the induced vibrations of the membrane for receiving again.
  • EP 1 515 303 B1 discloses a
  • Ultrasonic transducer assembly with a mass ring known.
  • An inventive ultrasonic sensor for a motor vehicle comprises a pot-shaped membrane.
  • the pot-shaped membrane has a membrane bottom and a membrane wall, wherein the ultrasonic sensor for emitting and / or receiving
  • Ultrasonic signals is formed over the diaphragm bottom.
  • the membrane wall is formed separately from the membrane bottom.
  • the pot-shaped membrane of the ultrasonic sensor according to the invention which is designed to emit the ultrasonic signals in a transmission direction and / or for receiving the ultrasonic signals against the transmission direction is thereby constructed from several individual parts, wherein the membrane wall and the diaphragm bottom are formed as separate items.
  • the diaphragm base comprises a front side pointing in the transmission direction and a rear side opposite the front side.
  • Membrane bottom has in particular a circular outer periphery.
  • a transducer element such as a piezoelectric element, arranged, for example, glued, be on the back of the membrane base.
  • the membrane base and the membrane wall can, for example, from
  • the membrane bottom may comprise aluminum and / or a damping plastic and / or a fiber, for example a carbon fiber.
  • the front side of the membrane base can already before the assembly of the cup-shaped membrane, ie before the joining of the
  • Membrane bottom and the membrane wall to be coated with a coating layer and, for example, in their color to a later installation on the motor vehicle,
  • the ultrasonic sensor according to the invention which is constructed from the separate individual parts, for example, a plurality of membrane bottoms can be punched out of a plate, for example an aluminum sheet, which can be coated on one side with the paint layer. The coated side of the
  • Aluminum sheet panel forms the later front side of the membrane bottom.
  • the membrane wall can also be made, for example, of aluminum or of a ceramic and, for example, by bonding to the membrane bottom, be joined to the cup-shaped membrane in a material-locking manner.
  • Ultrasonic sensor has the advantage that it is particularly easy and fast to manufacture. Due to the separate production of the membrane base and the membrane wall, in particular the elaborate step of painting the membrane base and the membrane wall.
  • the membrane wall is segmented into at least two membrane wall segments, wherein the membrane wall segments spaced from each other on the
  • Membrane bottom are arranged and in particular cohesively with the
  • Membrane bottom are connected.
  • the membrane wall itself is formed of individual parts, namely the membrane wall segments, which are separated
  • the membrane wall segments can be glued to the membrane floor, for example, for bonding material.
  • the membrane wall segments for example, of a ceramic or a metal with particularly dampening
  • the ultrasonic sensor Due to the separated membrane wall segments, a mass inertia and a rigidity of the membrane can be increased, thereby advantageously reducing a vibration energy of the membrane in a short time. On the other hand, due to the separated membrane wall segments, the membrane can oscillate freely very well, and thus the required vibration energy can be provided. By materially joining the membrane wall segments with the membrane bottom, for example by gluing, the ultrasonic sensor can be manufactured in a particularly simple and low-effort.
  • the membrane wall is segmented into four membrane wall segments, wherein the four membrane wall segments are arranged in a circumferential direction, which runs around a longitudinal axis oriented perpendicular to the membrane bottom, uniformly spaced from each other on the membrane bottom.
  • the membrane wall segments are in particular configured identical to each other. This means that the individual
  • Membrane wall segments have the same geometric shape and the same mass.
  • the four membrane wall segments along a, in particular circular, outer periphery of the membrane base are evenly spaced or equidistant from the membrane bottom. This means that the membrane bottom through the four membrane wall segments in four equal
  • Circular segments is divided, wherein in each case a membrane wall segment in a
  • Circular segment is arranged on the diaphragm bottom.
  • the four diaphragm wall segments may be formed, for example, as vibration-damping pins or bolts, wherein the bolts can be easily adapted in their geometry and mass to the required inertia and the required stiffness of the membrane.
  • bottom surfaces of the membrane wall segments are arranged adjacent to a rear side of the membrane bottom on the membrane bottom, and are in particular materially bonded to the rear side of the membrane bottom.
  • the bottom surfaces of the membrane wall segments each have an inner edge and an outer edge, wherein the inner edge of the longitudinal axis of the membrane base in the radial direction has a smaller distance from the longitudinal axis than the outer edge.
  • a distance between the inner edge and the outer edge of a bottom surface of a membrane wall segment is referred to as the radial width of the bottom surface.
  • the outer edges of the bottom surfaces and the outer periphery of the membrane base are parallel to each other. In a along the circumferential direction curved outer circumference, as for example in a
  • the respective outer edges are also curved along the circumferential direction, wherein the outer periphery and the respective outer edges have the same radius of curvature.
  • the bottom surfaces can be glued, for example, to the backs of the membrane base.
  • Membrane wall segment formed wherein a limited by inner edges of the bottom surfaces of the membrane wall segments area is formed circular on the back of the membrane bottom.
  • each of the diaphragm wall segments is formed along the outer periphery of the diaphragm bottom with the same radial width of the bottom surface of the respective diaphragm wall segment. This means, that the distance between the outer edge and the inner edge of a bottom surface in the circumferential direction remains unchanged.
  • a wall thickness of a membrane wall segment that is, a distance between an adjoining the outer edge outer wall and a subsequent to the inner edge
  • Inner wall of the membrane wall segment homogeneous.
  • the form is
  • Ring-shaped strip lying region of the membrane base has the circular shape.
  • the invention is based on the finding that a shape of a sound field of the ultrasonic sensor can be influenced by the geometric configuration or shape of the bottom surfaces of the membrane wall segments. Due to the circular, round membrane floor area, a round sound field of the
  • each of the membrane wall segments along the circumferential axis of the membrane bottom extending circumferential direction, ie along the outer circumference, formed with a decreasing or tapering radial width of the bottom surface, wherein a limited by inner edges of the bottom surfaces of the membrane wall segments area on the back of the membrane bottom is oval-shaped.
  • reduce the radial widths of the bottom surfaces of two diagonally opposite diaphragm wall segments in the circumferential direction while reducing the radial widths of the two other diagonally opposite bottom surfaces against the direction of rotation.
  • each of the bottom surfaces along the circumferential direction has a thickened end and a tapered end.
  • Membrane bottom plane extends, in pairs, the thickened ends of two adjacent bottom surfaces facing each other and along a perpendicular to the longitudinal axis and the vertical axis oriented horizontal axis, which also in the
  • Membrane bottom plane runs in pairs, the two tapered ends of the bottom surfaces facing each other.
  • the region delimited by the inner edges of the bottom surfaces is thus designed in the shape of an oval or ellipse, with the main axis of the ellipse extending along the horizontal axis in this case.
  • the oval-shaped region of the membrane base thus makes it possible to produce a sound field which is horizontally wide and vertically narrow.
  • a region which is particularly wide in the horizontal direction can thus be detected, and a region which is particularly narrow in the vertical direction can be detected.
  • the ultrasonic sensor may be arranged, for example, in a bumper of the motor vehicle and monitor an area behind the motor vehicle.
  • an area can be covered by the horizontally wide sound field, which extends over a width of the motor vehicle. Due to the horizontal narrow sound field of the ultrasonic sensor but can be prevented in an advantageous manner that
  • the ultrasonic sensor is thus designed to be particularly flexible, since a desired sound field can easily be generated via the geometric configuration of the bottom surfaces of the membrane wall segments and the ultrasonic sensor can thus be adapted in an advantageous manner to a later installation location of the ultrasonic sensor.
  • an outer wall of the invention is provided. According to one embodiment of the invention, an outer wall of
  • Membrane wall segments along the perpendicular to the diaphragm bottom oriented longitudinal axis formed with a constant radial distance from the longitudinal axis and formed an inner wall of the diaphragm wall segments along the longitudinal axis with a decreasing towards the longitudinal axis radial distance.
  • a mass of the membrane wall segments can be influenced, wherein the mass can be chosen so that the vibrations of the membrane can be reduced in the shortest possible time.
  • Recess is arranged, wherein the arranged on the back of the membrane bottom transducer element of the ultrasonic sensor partially in the
  • Recesses of the membrane wall segments is arranged.
  • the recess in the membrane wall segments extends in particular from the respective Floor area up to a predetermined height along the longitudinal axis of the
  • the recess is formed by different wall thicknesses of the membrane wall segments along the longitudinal axis.
  • the outer edge and the inner edge perpendicular to the bottom of the membrane, the outer wall and the
  • Inner wall extend to the predetermined height and thus each one
  • Membrane wall segment socket corresponds to the radial width of the respective
  • Membrane wall segments in particular to the longitudinal axis, ie to
  • Membrane bottom center in particular abruptly, so that a limited by the inner edges of the bottom surfaces of the membrane area area is covered from the predetermined height of the membrane wall segments.
  • the transducer element is arranged on the back of the membrane base, so that an outer region of the transducer element is arranged in regions in the recesses or is overlapping with the membrane wall segments and thus is covered by these.
  • the membrane wall segments can be particularly space-saving arranged on the diaphragm bottom, with a particularly large area is provided for arranging the transducer element.
  • an advantageous embodiment of the invention provides that the membrane wall segments are arranged spaced from an outer periphery of the membrane bottom on a rear side of the membrane bottom to form an outer region of the membrane bottom extending between the membrane wall segments and the outer periphery.
  • the outer edges of the bottom surfaces are spaced apart from the outer periphery of the membrane bottom such that the membrane wall segments are offset inwardly toward the longitudinal axis on the diaphragm bottom.
  • the outer region of the membrane base is thus annular in the case of a curved outer circumference and curved outer edges
  • the membrane may for example be arranged in a housing and be connected via this outer region, for example, with the housing.
  • the membrane bottom has a
  • the membrane base thus has different thicknesses or material thicknesses in the radial direction, wherein the Membrane bottom in the forehead area is thicker than in the outer area.
  • Membrane wall segments are on the forehead area on the back of the
  • the forehead area thus forms a pedestal on which the membrane wall segments are arranged elevated in comparison to the outside area.
  • the membrane wall segment base of a respective membrane wall segment protrudes over the region in regions, so that the respective membrane wall segment base partially overlaps with the outside area, but does not touch it.
  • an oscillating mass of the membrane can thus additionally be influenced and adapted to the subsequent application of the ultrasound sensor.
  • Membrane wall segments a membrane bottom collar is bent up forming.
  • the diaphragm bottom itself is cup-shaped, wherein the
  • Membrane bottom collar is formed circumferentially around the membrane wall segments and the membrane bottom collar while the outer wall of the membrane wall segments faces.
  • the outer region of the membrane base is bent up so far that the outer region or the membrane base collar at least partially overlaps with the outer wall of the membrane wall segments.
  • the ultrasonic sensor has a housing for receiving the
  • Membrane wall segments wherein the housing along a front
  • the housing is formed separately from the membrane and receives the membrane at least partially.
  • the fastening element may for example also be formed as a collar which extends along the front housing opening around the front side
  • Housing opening extends around.
  • Membrane housings are the membrane wall segments in an interior of the
  • the housing opening is through the diaphragm bottom
  • the outer region of the membrane bottom in particular the membrane bottom collar, can be applied to the fastening element, so that the membrane bottom collar covers the fastening element towards the outside.
  • the pot-shaped membrane bottom is slipped over the housing opening and over the fastening element arranged on the housing opening.
  • the housing opening is completely covered to the outside.
  • Membrane bottom which is coated in particular with a lacquer layer in the color of the later installation location, in this case faces a surrounding area outside the housing.
  • the ultrasonic sensor can thus, for example, on a
  • Exterior trim part of the motor vehicle are arranged and installed there almost invisible.
  • the vibration-decoupling mass can be, for example, a soft silicone adhesive which decouples the housing from the diaphragm in terms of vibration technology.
  • a silicone ring as previously provided in ultrasonic sensors omitted.
  • bonding compound is arranged, in particular, between the rear side of the membrane base in the region of the membrane base collar and the fastening element and extends in particular in an L-shaped manner over a collar end of the membrane base, which is defined by the outer circumference of the bent-over outer region of the membrane base
  • Membrane bottom is formed.
  • the collar end and the back of the membrane bottom are connected in the region of the membrane base collar via the connecting mass with the fastening element, whereby the housing is particularly well sealed.
  • moisture and dirt penetrates into the interior of the housing.
  • the interior of the housing is filled with a foam for damping.
  • the foam completely covers the back of the membrane and the membrane wall segments.
  • the foam is also arranged between the membrane collar and the outside of the membrane wall segments.
  • a motor vehicle according to the invention comprises at least one ultrasonic sensor according to the invention.
  • the at least one ultrasonic sensor can, for example, for
  • the motor vehicle is designed in particular as a passenger car.
  • the invention also relates to a method for producing an ultrasonic sensor for a motor vehicle with a membrane having a diaphragm bottom and a
  • the ultrasound sensor is designed to emit and / or receive ultrasound signals over the diaphragm bottom.
  • the ultrasound sensor is designed to emit and / or receive ultrasound signals over the diaphragm bottom.
  • Membrane wall formed separately from the diaphragm bottom. The membrane of the
  • Ultrasonic sensor is therefore not as previously, for example, in one piece
  • the membrane wall and a piezo element can be adhered to a rear side of the membrane base and
  • Silicone adhesive on an outer region or an outer edge of the
  • Membrane bottom can be applied, which decouples vibration in a next assembly step, the diaphragm bottom with a housing of the ultrasonic sensor and glued.
  • Membrane wall which preferably made of vibration damping
  • Diaphragm wall segments or pins pressed to the housing and cured there. Thereafter, a contacting of the piezo to the electronics can be done in a conventional manner and the converter, for example, be sealed tight.
  • Membrane bottom indicated on the membrane wall and at a given before the ultrasonic sensor and looking in the direction of the ultrasonic sensor given positions and orientations.
  • Fig. 1 is a schematic representation of an embodiment of a
  • Motor vehicle which has a driver assistance system with a plurality of ultrasonic sensors;
  • Fig. 2 is a schematic representation of an embodiment of a
  • 3a shows a schematic illustration of an embodiment of bottom surfaces of the membrane wall segments in a plan view
  • 3b is a schematic representation of another embodiment of
  • 4a is a schematic representation of an embodiment of a
  • Fig. 4b is a schematic representation of another embodiment
  • FIG. 1 shows a motor vehicle 1 according to an embodiment of the present invention
  • the motor vehicle 1 is formed in the present case as a passenger car.
  • the motor vehicle 1 has a driver assistance system 2, which in turn is a control device 3, for example, by an electronic
  • Control unit of the motor vehicle 1 may be formed comprises.
  • the driver assistance system 2 comprises at least one ultrasonic sensor 4.
  • driver assistance system 2 includes eight ultrasound sensors 4, of which four ultrasound sensors 4 are arranged in a front region 5 and four further ultrasound sensors 4 in a rear region 6 of motor vehicle 1.
  • the ultrasonic sensors 4 are in particular designed to detect an object in an environmental region 7 of the motor vehicle. Furthermore, the ultrasonic sensors 4 can be designed to be at a distance from the object in the surrounding area 7 of the
  • Fig. 2 shows an embodiment of an ultrasonic sensor 4 in a sectional side view.
  • the ultrasonic sensor 4 is axisymmetric with respect to a
  • the ultrasonic sensor 4 has a cup-shaped membrane 8, which is formed by a membrane bottom 9 and a separately formed diaphragm wall 10, wherein the ultrasonic sensor 4 for emitting ultrasonic signals in a transmission direction R A and for receiving the ultrasonic signals against the transmission direction R A is formed.
  • the membrane base 9 has a circular surface in a plan view, which is bounded by an outer circumference A.
  • Membrane bottom 9 and the membrane wall 10 are separately formed individual parts, which form the pot-shaped membrane 8 in combination.
  • the membrane bottom 9 can be formed, for example, from aluminum, from a plastic or a fiber, for example a carbon fiber.
  • a facing in the transmission direction R A front side 12 of the membrane base 9 can be coated with a coating layer. In an intended installation position of the ultrasonic sensor 4 on the motor vehicle 1, this front side 12 of the diaphragm bottom 9 faces the surrounding area 7 of the motor vehicle 1.
  • the membrane wall 10 has a plurality of separately configured
  • Membrane wall segments 1 1, of which here in the sectional side view two are shown.
  • the ultrasonic sensor 4 preferably has four diaphragm wall segments 1 1, which are in particular of identical construction and which are uniformly spaced or equidistant around the longitudinal axis L oriented perpendicular to the diaphragm bottom 9 in a circumferential direction Ru.
  • the membrane wall segments 1 1 may for example be formed of a ceramic or of a metallic material.
  • Membrane wall segments 1 1 are arranged on a rear side 14 of the membrane base 9, which is opposite to the front side 12 of the membrane base 9, and connected in a materially bonded manner, in particular adhesively bonded.
  • the membrane wall segments 1 1 serve to increase the mass inertia and the rigidity of the membrane base 9 and thus for rapid vibration reduction of the membrane base 9 after the emission of the ultrasonic signal in the transmission direction R A.
  • the embodiment of the membrane base 9 shown in FIG. 2 is again shown separately in FIG. 4a.
  • the diaphragm bottom 9 has according to this embodiment in the radial direction R r different thicknesses di, d 2 .
  • an end region 16 which extends in the radial, outwardly leading direction R r to a Stirn Schl.srand 15, a first thickness di.
  • the outer region 17 adjoining the end region 16 from the end region edge 15 has a second thickness d 2 reduced compared to the first thickness di.
  • the outdoor area 17 is a
  • Membrane bottom collar 18 forming bent, so that the diaphragm bottom 9 itself is cup-shaped.
  • FIG. 4b shows an alternative embodiment of a membrane base 9, in which the membrane base 9 has a uniform thickness d in the radial direction R r .
  • the outer region 17 of the membrane bottom 9 is bent open to form the membrane bottom collar 18, so that the membrane bottom 9 is likewise designed cup-shaped.
  • the diaphragm wall segments 1 1 are on the
  • Front region 16 of the membrane bottom 9 is arranged on the rear side 14 of the membrane bottom 9, wherein the bottom surfaces 13 of the membrane wall segments 1 1 protrude beyond the end surface edge 15 in the radial direction R r .
  • the regions of the membrane wall segments 1 1 which protrude radially beyond the end face edge 15 in each case form a membrane wall segment socket 37.
  • the membrane bottom collar 18 underlaps
  • a radial distance a ⁇ of the outer wall 20 of the membrane wall segments 1 1 to the longitudinal axis L is, except in the region of the membrane wall segment socket 37, formed constant.
  • Membrane wall segments 1 1 a recess 22 is formed.
  • a transducer element 23, for example, a piezoelectric element, is arranged for generating vibration for the membrane 8 on the back 14 of the membrane bottom 9 in regions in the recesses 22 of the diaphragm wall segments 1 1.
  • the membrane wall segments 1 1 roof the transducer element 23 in the region of the recess 22 so partially. Contrary to the transmission direction R A above the recess 22, the inner wall 21 of the changes
  • Membrane wall segments 1 1 their radial distance a 2 , a 3 to the longitudinal axis L.
  • the inner walls 21 of the membrane wall segments 1 1 thus form an hourglass shape here.
  • a sound field of the ultrasonic sensor 4 can be determined or influenced.
  • Possible geometric shapes of the bottom surfaces 13 are shown by way of example in FIGS. 3a and 3b.
  • Fig. 3a is a plan view of an embodiment of the bottom surfaces 13 of the four diaphragm wall segments 1 1 is shown.
  • the diaphragm bottom 9 is of a horizontal axis H and of a perpendicular vertical axis V - the axes H and V are perpendicular to the axis L - divided into four equal circular segments, each with a membrane wall segment 1 1 in each one of
  • Circle segments lies.
  • Membrane wall segments 1 1 shown.
  • the bottom surfaces 13 are the surfaces over which the membrane wall segments 1 1 are connected to the back 14 of the membrane bottom 9.
  • the inner walls 21 and the outer walls 20 of the diaphragm wall segments 1 1 extend here into the plane of the drawing.
  • the bottom surfaces 13 have an inner edge 24 and an outer edge 25 located further outward in the radial direction R r .
  • a distance between the inner edge 24 and the outer edge 25 of a bottom surface 13 forms a radial width b of the bottom surfaces 13.
  • this radial width b changes in the circumferential direction Ru around the Longitudinal axis L not. This means that a radial distance from the longitudinal axis L to the inner edge 24 of the bottom surfaces 13 does not change and a radial distance from the longitudinal axis L to the outer edge 25 of the bottom surfaces 13 in the direction of rotation Ru does not change.
  • the bottom surfaces 13 of the diaphragm wall segments 1 1 are here formed annular segment-shaped, so that a region 26, which is bounded by the inner edges 24 of the bottom surfaces 13, has a circular shape. By means of this circular region 26, a round sound field for the ultrasonic sensor 4 can be generated by means of the membrane 8.
  • Fig. 3b shows another embodiment for bottom surfaces 13 of the four
  • Membrane wall segments 1 1.
  • a radial width changes bi, b 2 of
  • Diaphragm wall segments 1 1 each have a thickened end 27 with a first width bi and a tapered end 28 with a second width b 2 reduced in comparison to the first width bi.
  • the taper arises here by an increasing radial distance from the longitudinal axis L to the inner edge 24 of a respective bottom surface 13 along the direction of rotation Ru. The radial distance from the longitudinal axis L to the outer edge 25 of the respective bottom surface 13 along the
  • the direction of rotation Ru does not change here.
  • the tapered ends 28 of two adjacent bottom surfaces 13 of the horizontal axis H facing and the thickened ends 27 of two adjacent bottom surfaces 13 of the vertical axis V faces.
  • the limited by the inner edges 24 of the bottom surfaces 13 region 26 has an oval or elliptical shape.
  • the ultrasonic sensor 4 additionally has a housing 29, which is formed separately from the membrane 8 and receives the membrane 8 at least in regions.
  • a housing 29 In an interior 30 of the housing 29 are the
  • Diaphragm wall segments 1 1 arranged.
  • a circuit board 31 is arranged, on which a plug 32 is mounted.
  • the plug 32 is electrically connected via a strand 33 to the transducer element 23 for contacting the transducer element 23.
  • a front housing opening of the diaphragm bottom 9 is arranged, so that the diaphragm bottom 9 completely covers the housing opening and the housing 29 thus closes the front side.
  • the rear side 14 of the membrane bottom 9 faces the interior 30 of the housing 29.
  • the interior 30 of the housing 29 is here also filled with a damping foam 36, which is the back 14 of the membrane bottom 9, the Membrane wall segments 1 1 and the transducer element 23 completely covered and the cavity 19 between the diaphragm bottom collar 18 and the outer wall 20 of the diaphragm wall segments 1 1 fills.
  • a damping foam 36 which is the back 14 of the membrane bottom 9, the Membrane wall segments 1 1 and the transducer element 23 completely covered and the cavity 19 between the diaphragm bottom collar 18 and the outer wall 20 of the diaphragm wall segments 1 1 fills.
  • the housing 29 has a direction of rotation Ru
  • circumferential fastener 34 which is also formed collar-shaped here.
  • Diaphragm wall segments 1 1 placed in the interior 30 of the housing 29 and the membrane bottom collar 18 adjacent to the fastener 34 arranged.
  • Housing opening and for vibration isolation of the housing 29 of the membrane 8 is provided between the fastener 34 and the membrane bottom collar 18, a connecting compound 35 which is L-shaped or angled over the back 14 of the membrane bottom 9 in the region of the Membranssenkragens 18 and over an edge of the Membranssenkragens 18 extends.
  • the fastening element 34 of the housing 29 and the membrane bottom collar 18 is arranged overlapping, wherein the membrane bottom collar 18 in the radial direction R r further out.
  • Fastener 34 is integrated into the outer wall 38 or integrally formed therewith and in the radial direction R r lying further inward than the outer wall 38 located further out.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

L'invention concerne un capteur à ultrasons (4) pour un véhicule à moteur (1), comportant une membrane (8) en forme de pot, présentant une base de membrane (9) et une paroi de membrane (10), le capteur à ultrasons (4) étant conçu pour émettre et/ou recevoir des signaux ultrasonores par la base de membrane (9), la paroi de membrane (10) étant conçue de façon séparée par rapport à la base de membrane (9). L'invention concerne en outre un véhicule automobile (1) et un procédé pour la fabrication d'un capteur à ultrasons (4).
PCT/EP2016/065696 2015-07-07 2016-07-04 Capteur à ultrasons pour un véhicule automobile, véhicule automobile ainsi que procédé de fabrication d'un capteur à ultrasons Ceased WO2017005686A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16734398.7A EP3320363A1 (fr) 2015-07-07 2016-07-04 Capteur à ultrasons pour un véhicule automobile, véhicule automobile ainsi que procédé de fabrication d'un capteur à ultrasons

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015110939.5A DE102015110939B4 (de) 2015-07-07 2015-07-07 Ultraschallsensor für ein Kraftfahrzeug, Kraftfahrzeug sowie Verfahren zum Herstellen eines Ultraschallsensors
DE102015110939.5 2015-07-07

Publications (1)

Publication Number Publication Date
WO2017005686A1 true WO2017005686A1 (fr) 2017-01-12

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Application Number Title Priority Date Filing Date
PCT/EP2016/065696 Ceased WO2017005686A1 (fr) 2015-07-07 2016-07-04 Capteur à ultrasons pour un véhicule automobile, véhicule automobile ainsi que procédé de fabrication d'un capteur à ultrasons

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DE102017205376A1 (de) * 2017-03-30 2018-10-04 Robert Bosch Gmbh Schallwandler
DE102017205375A1 (de) * 2017-03-30 2018-10-04 Robert Bosch Gmbh Schallwandler
DE102017113486B4 (de) 2017-06-20 2025-09-11 Valeo Schalter Und Sensoren Gmbh Ultraschallsensor für ein Kraftfahrzeug mit einem Sensorgehäuse mit einer Membran und mit einem Positionshalter zum Halten der Membran im Sensorgehäuse sowie Kraftfahrzeug
DE102018100121B4 (de) 2018-01-04 2022-09-01 Valeo Schalter Und Sensoren Gmbh Ultraschallsensor für ein Kraftfahrzeug mit einer aus zwei Materialien gefertigten Membran, Ultraschallsensorvorrichtung, Fahrerassistenzsystem sowie Herstellungsverfahren

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EP0178346A1 (fr) * 1984-02-21 1986-04-23 NGK Spark Plug Co. Ltd. Transducteur à ultrasons
DE69915902T2 (de) * 1998-01-13 2005-01-05 Murata Manufacturing Co., Ltd., Nagaokakyo Ultraschallfühler, der ein zylindrisches Gehäuse enthält
DE102010044995A1 (de) * 2010-09-10 2012-03-15 Valeo Schalter Und Sensoren Gmbh Ultraschallwandler für eine Fahrerassistenzeinrichtung
WO2013178390A1 (fr) * 2012-05-31 2013-12-05 Robert Bosch Gmbh Capteur à ultrasons ainsi que dispositif et procédé pour mesurer une distance entre un véhicule et un obstacle
DE102012211011A1 (de) * 2012-06-27 2014-01-02 Robert Bosch Gmbh Akustischer Sensor mit einer Membran aus einem Faserverbundwerkstoff

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DE10201990A1 (de) * 2002-01-21 2003-07-31 Valeo Schalter & Sensoren Gmbh Sensoreinheit
DE10341422A1 (de) 2003-09-09 2005-03-31 Sick Engineering Gmbh Ultraschallwandleranordnung

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Publication number Priority date Publication date Assignee Title
EP0178346A1 (fr) * 1984-02-21 1986-04-23 NGK Spark Plug Co. Ltd. Transducteur à ultrasons
DE69915902T2 (de) * 1998-01-13 2005-01-05 Murata Manufacturing Co., Ltd., Nagaokakyo Ultraschallfühler, der ein zylindrisches Gehäuse enthält
DE102010044995A1 (de) * 2010-09-10 2012-03-15 Valeo Schalter Und Sensoren Gmbh Ultraschallwandler für eine Fahrerassistenzeinrichtung
WO2013178390A1 (fr) * 2012-05-31 2013-12-05 Robert Bosch Gmbh Capteur à ultrasons ainsi que dispositif et procédé pour mesurer une distance entre un véhicule et un obstacle
DE102012211011A1 (de) * 2012-06-27 2014-01-02 Robert Bosch Gmbh Akustischer Sensor mit einer Membran aus einem Faserverbundwerkstoff

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