WO2024028086A1 - Logement pour des transducteurs ultrasonores, ledit logement présentant des surfaces inférieures inclinées différemment - Google Patents

Logement pour des transducteurs ultrasonores, ledit logement présentant des surfaces inférieures inclinées différemment Download PDF

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Publication number
WO2024028086A1
WO2024028086A1 PCT/EP2023/069762 EP2023069762W WO2024028086A1 WO 2024028086 A1 WO2024028086 A1 WO 2024028086A1 EP 2023069762 W EP2023069762 W EP 2023069762W WO 2024028086 A1 WO2024028086 A1 WO 2024028086A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
modulator
bottom wall
side wall
receptacle
Prior art date
Application number
PCT/EP2023/069762
Other languages
German (de)
English (en)
Inventor
Fabian Haag
Hans-Wilhelm Wehling
Joerg Weyland
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 WO2024028086A1 publication Critical patent/WO2024028086A1/fr

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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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
    • B06B1/0644—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element
    • 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
    • G10K9/22—Mountings; Casings

Definitions

  • the present invention relates to a housing for an ultrasonic transducer for detecting an object in the surroundings of a vehicle, further to an ultrasonic transducer for detecting an object in the surroundings of a vehicle and a vehicle.
  • Ultrasonic transducers for detecting an object in the vicinity of a vehicle are used, for example, for parking systems or the like. Such ultrasonic transducers often work according to the pulse-echo principle, with the same ultrasonic transducer being used as a transmitter and receiver. It is therefore particularly difficult to design the smallest possible "blind zone" in the close range from which no echo signal can be received or reliably detected. The size of this "blind zone" is characterized and determined by a reverberation time of the transducer after the pulse is transmitted.
  • ultrasonic transducers are generally based on the bending transducer principle.
  • a piezo transducer disk is applied to a membrane and operated in a resonance mode.
  • a pronounced directional characteristic and a narrow opening angle are generally desired. This can be achieved, for example, through a special membrane geometry.
  • JP 2001 326987 A discloses a pot-like housing for an ultrasonic transducer, the bottom of which has a central circular disk-shaped thickening. This design partially exhibits low electro-acoustic efficiency, which shortens a detection range of the resulting ultrasonic transducer. Furthermore, can This design can provide a long reverberation time after an ultrasound pulse is emitted, thereby increasing a blind area in a near field.
  • JP 2006 174 003 discloses a rotationally symmetrical cup-shaped housing for an ultrasonic transducer.
  • a bottom portion of the housing has a truncated cone shape, the thickness of which increases inwardly with a constant slope from a side wall to a central plateau for a transducer element.
  • Sharp edges on JP 2006 174 003 may be difficult to produce.
  • fluctuations in radius can show strong interactions with a resonance frequency.
  • the described ultrasonic transducer includes a bottomed circular cylindrical housing and a piezoelectric element provided substantially at a center of a bottom of the housing.
  • the bottom of the casing has a slope portion that gradually becomes thinner from a position where the piezoelectric element is provided toward an inner wall surface of the casing, and a flat portion that extends from an outer edge of the slope portion to the inner wall surface of the casing, while maintaining a thickness of the outer edge of the slope portion.
  • the reverberation time can be extended.
  • the disclosed housing tends to show visible burrs on a body exterior when installed.
  • a directional characteristic may be worse and the opening angle widened.
  • the electro-acoustic efficiency may be reduced.
  • Other housings for ultrasonic transducers are known in the prior art:
  • JP 2005 039 689 A discloses a pot-like housing for an ultrasonic transducer with a flat bottom. On one side, the flat floor is provided with a flat step or several flat steps towards the outside of the floor, so that another thinner or several further thinner floor sections result.
  • the one-sidedness leads to a tilting of an ultrasonic detection cone relative to a longitudinal axis of the housing. The tilting results in the ultrasonic detection cone not being symmetrical to the longitudinal axis. Therefore, the orientation of the sensor must be taken into account during installation.
  • This concept may be unsuitable for a version in which an asymmetrical cable connection is provided and/or identical parts are required for the right and left in a body.
  • the housing of JP 2005 039 689 A is unsuitable for embodiments that require a symmetrical overall sensor structure.
  • JP 2017 225 013 A discloses a circular disk-shaped housing for an ultrasonic transducer with a central oval recess.
  • This oval recess has a flat bottom, which has kidney-shaped depressions with a thinner, flat bottom on the short sides. In the cross section along a longitudinal axis of the oval recess, this results in a stepped progression of the floor thickness with flat steps.
  • DE 10 2008 040905 A1 discloses a pot-like housing for an ultrasonic sensor with a bottom surface and a side wall.
  • An electromechanical transducer element such as a cylindrical disk-shaped piezo element, is glued to an otherwise flat inside of the floor surface.
  • an object of the present invention is to provide an improved ultrasonic transducer and in particular a housing therefor.
  • the focus is on an advantageous compromise between directivity, electro-acoustic efficiency and/or short reverberation time.
  • a housing for an ultrasonic transducer for detecting an object in the surroundings of a vehicle is proposed.
  • the housing has a circumferential side wall and a bottom wall.
  • the surrounding side wall defines a main axis of the housing.
  • the bottom wall has a central receptacle for carrying a transducer element or ultrasound element and at least one modulator area.
  • the modulator area extends in a longitudinal sectional plane, which contains the main axis, radially from the receptacle to a transition of the bottom wall into the side wall.
  • a thickness of the bottom wall decreases radially outwards over the entire modulator area.
  • An inside of the bottom wall has at least two different angles of inclination in the modulator area.
  • the housing implements a compromise in the bottom wall.
  • the housing is characterized by a directional characteristic, which is achieved by means of a large aperture in the longitudinal section plane.
  • the bottom wall is characterized by a high electro-acoustic efficiency, which is achieved by appropriately shaping the modulator area.
  • the proposed housing is suitable for a desirably short reverberation time and is ultimately also robust against fluctuations in manufacturing tolerances.
  • the proposed housing is easy to manufacture due to the proposed bottom wall.
  • a thickness of the bottom wall decreases radially outwards over the entire modulator area.
  • the inside of the bottom wall has at least two different angles of inclination in the modulator area, particularly in the longitudinal section plane.
  • the side wall is preferably closed in the circumferential direction, but variants with a wall that is not continuous in the circumferential direction and/or a wall that is not partially continuous are also possible.
  • the bottom wall has an outside which is preferably perpendicular to the main axis. Variants are also conceivable in which the outside is concave and/or convexly curved and/or frustoconical and/or pointed.
  • the inside of the modulator area runs in a convex curve in the longitudinal section plane. This reduces the tendency to reverberate, i.e. improves it. It is conceivable that the entire modulator area is designed as a convex curve and that a region of the modulator area is designed as a convex curve.
  • convex and concave refer to a viewer in an interior space of the housing.
  • Convex means looking outwards from the inside of the housing, especially rounded. In colloquial terms, “convex” can be viewed as a bulge “outwards”. Functionally, a “convex” section of an inside of the bottom wall corresponds to more internal volume of the housing. “Concave” means looking inwards from the inside of the housing, especially rounded. In colloquial terms, “concave” can be thought of as a bulge “inwards”. Functionally, a “concave” section of an inside of the bottom wall corresponds to less internal volume of the housing.
  • a continuously differentiable course of the inside in the longitudinal section plane can be provided.
  • Examples include a parabolic and/or exponential shape. This allows frequency behavior to be improved. It is foreseeable that the inside is continuously differentiable over the entire modulator area. Furthermore, it is conceivable that the inside is continuously differentiable only over part of the modulator area.
  • an outer edge of the curve and/or parabola lies tangentially to an imaginary truncated cone angle.
  • the modulator area contains several truncated cone sections that have at least two different angles of inclination, a shape for the housing can be manufactured relatively easily. If two adjacent truncated cone sections, in particular radially adjacent truncated cone sections, merge into one another through a convex curve, damping can be improved and reverberation reduced. However, it is also conceivable that two adjacent truncated cone sections, in particular radially adjacent truncated cone sections, merge into one another through an edge, so that a natural frequency behavior becomes more pronounced. Depending on the interpretation, both are preferable further training courses.
  • a surface section of the modulator region is arranged further radially outwards, the flatter the respective surface section is.
  • the flatter truncated cone section radially outside of the steeper truncated cone section.
  • Statements such as “flat” and “steep” preferably refer to an imaginary perpendicular to the imaginary main axis.
  • the modulator area or a modulator area in each case extends symmetrically to the main axis in the longitudinal section plane, a directional characteristic of the ultrasonic transducer that is symmetrical to the main axis can be achieved.
  • a horizontally wide and vertically narrow ultrasound cone can be provided.
  • an advantageous directional characteristic can be achieved.
  • an effective aperture can be narrower in the direction of the second longitudinal section plane than in the direction of the first longitudinal section plane, so that a directional characteristic is wider in this direction of the second longitudinal section plane.
  • the side wall has a section that is parallel and/or at least approximately parallel and/or in sections to the longitudinal section plane parallel thickening.
  • an inner wall of the thickening can run concentrically to the receptacle.
  • an angle of inclination inside the modulator area is at least 2°, preferably at least 2.5° and more preferably at least 3°.
  • “Inside” in the modulator area means that a curve that merges into the preferably flat receptacle and/or a curve that merges into the preferably steep side wall can have a lower angle of inclination.
  • An angle of inclination of 0° means a perpendicular to the main axis, and an angle of inclination of 90° means a parallel to the main axis.
  • the housing can contain an anti-twist device. In this way, a desired orientation of a directional characteristic to a vehicle can be set safely.
  • an inside of the bottom wall merges from the modulator area into the receptacle by means of a concave curve. This makes the housing more tolerant of manufacturing fluctuations.
  • an inside of the bottom wall merges from the modulator area into an inside of the side wall by means of a convex curve.
  • an ultrasonic transducer is proposed. This has a housing according to one of the above options and a converter element.
  • the transducer element is carried in and/or on the receptacle, for example by means of gluing, welding and/or a chemical and/or mechanical fastening process.
  • a vehicle which contains at least one such ultrasonic transducer.
  • the vehicle is, for example, a passenger car or a truck.
  • FIG. 1 shows a schematic top view of a vehicle that contains several ultrasonic transducers
  • FIG. 2 shows a schematic perspective sectional view of a housing for an ultrasonic transducer according to a first embodiment of the invention
  • 3 shows a schematic longitudinal sectional representation of part of a bottom wall and part of a side wall of the housing for an ultrasonic transducer according to the first embodiment of the invention
  • FIG. 4 shows a schematic longitudinal sectional representation of part of a bottom wall and part of a side wall of a housing for an ultrasonic transducer according to a second embodiment of the invention
  • FIG. 5 shows a schematic longitudinal sectional representation of part of a bottom wall and part of a side wall of a housing for an ultrasonic transducer according to a third embodiment of the invention
  • FIG. 6 shows a schematic longitudinal sectional representation of part of a bottom wall and part of a side wall of a housing for an ultrasonic transducer according to a fourth embodiment of the invention.
  • FIG. 7 shows a schematic longitudinal sectional representation of part of a bottom wall and part of a side wall of a housing for an ultrasonic transducer according to a fifth embodiment of the invention.
  • the vehicle 100 is, for example, a car that is arranged in an environment 102.
  • the car 100 has a control unit 104.
  • several ultrasonic transducers 106 are provided on the car 100.
  • the ultrasonic transducers 106 are set up to detect a distance to objects arranged in the environment 102 and to output a corresponding sensor signal.
  • the ultrasonic transducers 106 are with the control unit
  • the figures 2 and 3 show a housing 110 for an ultrasonic transducer 106 according to a first embodiment of the housing 110.
  • the housing 110 has a bottom wall 1 12 and a side wall 1 14.
  • the side wall 114 is closed all around and thus forms an irregularly shaped tube on the inside.
  • the side wall 114 defines a main axis 1 18 at its center.
  • the housing is closed like a pot by the approximately disk-shaped bottom wall 112.
  • An inside 120 of the bottom wall 112 and an inside 122 of the side wall 114 delimit an interior 124 of the housing 110.
  • the housing 110 is cut in a longitudinal sectional plane 126, which contains the main axis 118.
  • Fig. 3 shows a part of the longitudinal section of Fig. 2 in a top view of the cut surface. 3 shows the section of the housing 110 with the longitudinal section plane 126. On the left in the picture is a part of the side wall 114 and on the right in the picture the main axis 118 is shown.
  • the bottom wall 112 has a receptacle 130 and a modulator region 132 radially outwards from the main axis 118.
  • the side wall 1 14 adjoins the modulator area 132 radially on the outside.
  • the receptacle 130 is an area of the bottom wall 112, which is prepared to carry a transducer element (not shown).
  • the converter element here is preferred a piezo element is used to convert between mechanical vibrations and electrical vibrations in the ultrasonic range.
  • An outside 136 of the bottom wall 112 preferably runs perpendicular to the main axis 118.
  • the transducer element is connected to the receptacle 130, such as glued.
  • the inside 120 in the area of the receptacle 130 preferably runs perpendicular to the main axis 118.
  • the receptacle 130 therefore has a thickness A.
  • the modulator region 132 is located in the longitudinal section plane 126 between the receptacle 130 and the side wall 114. In the first embodiment, the modulator region 132 adjoins the receptacle 130 by means of an internal transition 138. In addition, in the first embodiment, the modulator region 132 adjoins the side wall 114 by means of an external transition 140.
  • the bottom wall 112 has a smallest thickness B. This radially outer smallest thickness B is smaller than the radially inner thickness A of the receptacle 130.
  • a thickness C at any point of the modulator region 132 gradually decreases from the receptacle 130 to the transition 140. More specifically, in the first embodiment, the thickness C of the bottom wall 112 gradually decreases from the inner transition 138 to the outer transition 140. In other words: every thickness C of a point inside the modulator region 132 is smaller than the thickness A and larger than the thickness B.
  • the thickness C of the modulator region 132 is equal to the thickness A at the inner edge of the modulator region 132 and equal to the thickness B at the outer edge.
  • the modulator region 132 has two truncated cone sections 150 and 152.
  • a truncated cone section 150 arranged radially on the inside in the modulator region 132 has a relatively large inclination angle D.
  • a truncated cone section 152 arranged radially on the outside in the modulator region 132 has a relatively small inclination angle E.
  • the inclination angle D, E of a truncated cone 150, 152 or cone is the cone angle between a base and a flank of the cone or truncated cone.
  • the inside 120 has a surface section 134 in the area of the truncated cone sections 150, 152.
  • the truncated cone sections 150 and 152 merge into one another by means of a radially central transition 154.
  • the inner transition 138 from the receptacle 130 into the inner truncated cone section 150 is a concave transition 156, i.e. an inwardly curved transition as seen from the interior 124.
  • the middle transition 154 from the inner truncated cone section 150 into the outer truncated cone section 152 and the outer transition 140 from the outer truncated cone section 152 into the side wall 114 are each a convex transition 158, i.e. a transition that is curved outwards as seen from the interior 124.
  • FIG. 2 illustrates that there are two in the longitudinal section plane 126
  • modulator regions 132 which are arranged symmetrically with respect to the main axis 118.
  • the side wall 114 has a section designed as a collar 160, which is arranged, for example, at an end of the side wall 1 14 that is remote from the bottom wall 112.
  • the collar 160 protrudes radially outwards, but to different extents when viewed in the circumferential direction. 2 shows a narrow collar section 162 and a wide collar section 164.
  • a distance from the main axis 118 to the transition 138 is referred to as a radius F in FIG.
  • a distance from the main axis 118 to the inside 122 of the side wall 114 is referred to as a radius G or a distance G.
  • a difference between thicknesses A and B is referred to as a depth H.
  • the depth H is a depth of a recess formed by the modulator region 132 opposite the receptacle 130, see FIG. 2.
  • an outer radius of the side wall 114 is designated J.
  • the thinnest possible side wall 1 14 is therefore sought in the longitudinal section plane 126.
  • Advantageous G/J ratios are in the range above 0.9, preferably above 0.92.
  • the radius F of the receptacle can be 4.1 mm
  • the distance G can be 7.1 mm
  • the side wall 1 14 can be 0.6 mm thick in the longitudinal section plane 126.
  • the directional characteristic is also largely influenced by the outer radius F of the receptacle 130.
  • 2 shows by way of example that the side wall 114 has a thickening 170 in an area adjoining the bottom wall.
  • the thickening 170 is designed such that it is spaced from the longitudinal section plane 126 by approximately the radius F of the receptacle 130 and runs essentially parallel. “Approximately” in this specific context means in particular a range from +30% to -30% and preferably a range from +5% to -15%.
  • the outer radius F of the receptacle 130 is mainly influenced by the transducer element to be installed. For example, a transducer element with a radius of 4 mm and a matching outer radius F of 4.1 mm are proposed.
  • the directional characteristic is also significantly influenced by a ratio of the depth H to the outer thickness B.
  • the depth H is preferably greater in magnitude than the outer thickness B. According to experiments, a range of the ratio H/B from 1 to 2 and in particular from 1.2 to 1.5 is preferred.
  • the smallest inclination angle E should be at least 2° in order to exhibit behavior that is robust to manufacturing variations.
  • the smallest angle of inclination E is at least 2.5° and particularly preferably at least 3°.
  • the angle of inclination is preferably measured or compared against a perpendicular to the main axis 118.
  • the steepest inclination angle D should be at least 25° and preferably at least 30°. In preferred variants with two truncated cone sections, the steeper angle of inclination D is once 40° and another time 30°.
  • a radial extent of the modulator area 132 is the difference GF.
  • a preferred ratio of the depth H to a radial extent of the modulator region 132, i.e. a ratio H/(GF) is in the range of 0.1 to 0.4 and preferably in the range of 0.15 to 0.25. In other words, the radially wider the modulator region 132 is, the more advantageous is the transmission behavior of the housing 110.
  • the H/B ratio already described must be taken into account.
  • the transition from the thickness A of the receptacle 130 to the thickness B of the bottom wall 112 in the area of the transition 140 into the side wall should be as smooth as possible.
  • the ratio of the inclination angles D, E and the largest possible radius of the convex middle transition 154, 158 are advantageous for this.
  • the middle transition 154 has an exemplary radius of 0.75 mm with a thickness B of 0.4 mm or . a thickness A of 0.94 mm.
  • a radial mode or radial vibration form of the preferred piezo-based transducer element can advantageously be efficiently converted into a bending mode or bending vibration form of the ultrasonic transducer 106.
  • the supple shape of the modulator section 132 ensures that it matches the impedance of the converter element.
  • the interior 124 can be cast or filled with a damping material after the transducer element has been installed. Silicone is preferred for this.
  • modulator area 132 makes the modulator area 132 as smooth as possible prevents burrs, marks and/or markings from appearing during production. ments on the outside 136 of the bottom wall 112 arise, so that customer acceptance is improved.
  • a housing 200 according to a second embodiment of the invention is proposed below. Mainly differences from the first embodiment are discussed.
  • the second embodiment shows, so to speak, an ideal form of the invention.
  • the housing 200 of the second embodiment has a modulator region 132, which has a continuous curvature 202 on the inside 120 between the receptacle 130 and the side wall 114.
  • a side wall-side inclination angle or outer inclination angle E is at least 2°, preferably at least 2.5° and in particular at least 3°.
  • a recording-side or internal inclination angle D is, for example, 60°.
  • the transition 138 is designed as a sharp edge 204.
  • the transition 140 is designed as a sharp edge 206.
  • the continuous curvature 202 follows, for example, a parabola that is open towards the side wall 114, so that the thickness C of the modulator region decreases more strongly near the receptacle 130 than near the side wall 114.
  • the design of the continuous curvature 202 which is based on a horizontal parabola, corresponds to the proposal, that of two truncated cone sections, the flatter one should preferably be arranged radially on the outside.
  • a course based on an exponential function is also preferred.
  • a continuously differentiable course of the inside 120 of the bottom wall 1 14 has the smoothest course and therefore the highest electro-acoustic efficiency.
  • the continuously differentiable course can also be seen as the extreme form of “at least two different angles of inclination”.
  • a housing 210 according to a third embodiment shown in FIG. 5 differs from the housing 200 according to the second embodiment in the transition 138. Instead of the sharp edge 204, the concave rounding 156 is provided. Furthermore, reference is made to the above description, in particular of the second embodiment.
  • a housing 220 according to a fourth embodiment shown in FIG. 6 differs from the housing 210 according to the third embodiment in the transition 140. Instead of the sharp edge 206, the convex rounding 158 is provided. Furthermore, reference is made to the above description, in particular the second and third embodiments.
  • FIG. 7 shows a housing 230 according to a fifth embodiment. This differs from the first embodiment mainly in that instead of the middle transition 154 between the truncated cone sections 150 and 152, a sharp edge 232 is provided.
  • the flattest angle of inclination in each of the figures is at least 2°, even if this fineness is difficult to represent figuratively.

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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)
  • Mechanical Engineering (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

L'invention concerne un logement (110, 200, 210, 220, 230) pour un transducteur ultrasonore (106) destiné à détecter un objet dans l'environnement (102) d'un véhicule (100), ledit logement comprenant : une paroi latérale périphérique (114) qui définit un axe principal (118) du logement (110); et une paroi inférieure (112) qui comporte une partie de réception centrale (130) destinée à supporter un élément transducteur et au moins une région de modulateur (132); la région de modulateur (132) s'étendant dans un plan de section longitudinale (126), qui comprend l'axe principal (118), radialement de la partie de réception (130) à une transition (140) de la paroi inférieure (112) dans la paroi latérale (114); une épaisseur (C) de la paroi inférieure (112) diminuant radialement vers l'extérieur sur toute la région de modulateur (132); et un côté interne (120) de la paroi inférieure (112) dans la région de modulateur (132) comprenant au moins deux angles d'inclinaison différents (E, D).
PCT/EP2023/069762 2022-08-03 2023-07-17 Logement pour des transducteurs ultrasonores, ledit logement présentant des surfaces inférieures inclinées différemment WO2024028086A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022119465.5A DE102022119465A1 (de) 2022-08-03 2022-08-03 Gehäuse für ultraschallwandler mit unterschiedlich geneigten bodenflächen
DE102022119465.5 2022-08-03

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001326987A (ja) 2000-05-15 2001-11-22 Murata Mfg Co Ltd 超音波送受波器
JP2005039689A (ja) 2003-07-18 2005-02-10 Nippon Ceramic Co Ltd 超音波センサ
JP2006174003A (ja) 2004-12-15 2006-06-29 Murata Mfg Co Ltd 超音波送受波器
DE102008040905A1 (de) 2008-07-31 2010-02-04 Robert Bosch Gmbh Ultraschallsensor
US20110221304A1 (en) * 2008-12-04 2011-09-15 Murata Manufacturing Co., Ltd. Ultrasonic Transducer
JP2017225013A (ja) 2016-06-16 2017-12-21 日本セラミック株式会社 超音波送受波器
DE102016221542A1 (de) * 2016-11-03 2018-05-03 Robert Bosch Gmbh Membrantopf für einen Ultraschallwandler und Ultraschallwandler

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001326987A (ja) 2000-05-15 2001-11-22 Murata Mfg Co Ltd 超音波送受波器
JP2005039689A (ja) 2003-07-18 2005-02-10 Nippon Ceramic Co Ltd 超音波センサ
JP2006174003A (ja) 2004-12-15 2006-06-29 Murata Mfg Co Ltd 超音波送受波器
DE102008040905A1 (de) 2008-07-31 2010-02-04 Robert Bosch Gmbh Ultraschallsensor
US20110221304A1 (en) * 2008-12-04 2011-09-15 Murata Manufacturing Co., Ltd. Ultrasonic Transducer
DE112009003590T5 (de) 2008-12-04 2012-10-18 Murata Manufacturing Co., Ltd. Ultraschallwandler
JP2017225013A (ja) 2016-06-16 2017-12-21 日本セラミック株式会社 超音波送受波器
DE102016221542A1 (de) * 2016-11-03 2018-05-03 Robert Bosch Gmbh Membrantopf für einen Ultraschallwandler und Ultraschallwandler

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