EP3010654A1 - Dispositif de détection d'environnement comprenant un transducteur ultrasonore et véhicule automobile équipé d'un dispositif de détection d'environnement de ce type - Google Patents

Dispositif de détection d'environnement comprenant un transducteur ultrasonore et véhicule automobile équipé d'un dispositif de détection d'environnement de ce type

Info

Publication number
EP3010654A1
EP3010654A1 EP14727792.5A EP14727792A EP3010654A1 EP 3010654 A1 EP3010654 A1 EP 3010654A1 EP 14727792 A EP14727792 A EP 14727792A EP 3010654 A1 EP3010654 A1 EP 3010654A1
Authority
EP
European Patent Office
Prior art keywords
sensing device
front body
face
membrane
ultrasonic transducer
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Withdrawn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
EP14727792.5A
Other languages
German (de)
English (en)
Inventor
David Bartylla
Andre Gerlach
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3010654A1 publication Critical patent/EP3010654A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • 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
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/004—Mounting transducers, e.g. provided with mechanical moving or orienting device

Definitions

  • the invention also relates to a motor vehicle in which at least one such
  • ultrasound signals are usually transmitted through a medium such as air or water from an emitter to a receiver or transmitted from an emitter into an environment or detected by an object located in the surrounding ultrasonic signals and the runtime and / or
  • these sound transducers are predominantly resonant oscillators, which consist of solids and one or more piezo elements.
  • resonant oscillator are, among others, called piezobased as thickness vibrator
  • Ultrasonic transducer known as prior art.
  • a basic structure of a known environment sensing device is shown in Fig. 7, wherein the thickness of the oscillator 91 of
  • Environment sensing device 9 is disposed on an outer skin 92 of a motor vehicle bumper (not shown) and has a flat piezoelectric element 912 as an ultrasonic transducer element, which is embedded in a resonator, that is between a Front body 91 1 of the resonance body and a rear body 913 of the resonance body is arranged and coupled thereto.
  • a specific example of an ultrasonic sensor for a motor vehicle can be found in DE 10 2007 046 031 A1.
  • the ultrasonic sensor described therein is formed with an acoustic tuning layer which is coupled to a vibration element.
  • the vibrating element generates ultrasonic waves that are emitted into the environment of the motor vehicle, and the acoustic tuning layer is reflected by
  • the ultrasonic sensor is here mounted on a bumper or a bumper of the motor vehicle, for example in a hole in the bumper, wherein a receiving surface of the ultrasonic transducer is exposed to the surroundings of the motor vehicle.
  • a disadvantage of the ultrasound transducers already known from the prior art is, among other things, that they are installed visibly in a bumper of a motor vehicle or are perceptibly integrated in the latter, and therefore on a
  • Ultrasonic transducer usually painted in the car color of the respective motor vehicle. As a result, only a minimal improvement in the optical perceptibility of the ultrasonic transducers can be achieved.
  • Ultrasonic transducer is to be found in that they usually provide no or only a complex external damping of the vibration behavior, which usually leads to increased installation costs and additionally required space. Such damping is extremely advantageous for the vibration behavior of
  • An environment sensing device which provides a solution to the problems discussed above has an ultrasonic transducer comprising at least one transducer element and at least one resonator body and a membrane for sound transmission, wherein the environmental sensing device is configured to transmit and / or to transmit ultrasonic signals receive.
  • the resonator body has a front body and a rear body and is coupled to the diaphragm at an end face of the front body, that is to say at a portion of the front body facing toward the diaphragm, wherein the end face of the front body coupled to the diaphragm is plate-shaped.
  • the plate shape may have a widthwise dimension that is greater than a heightwise direction or the height direction, with a preferred height of the plate-shaped face being between 0.1mm and 30mm, and a preferred width of the plate-shaped face being between 0.5mm and 0.5mm 30mm is.
  • the front body and the rear body of the resonator, also called vibrating body can be made of different materials, such as metal, ceramic or plastic or a combination of these.
  • the acoustic wave emitted by the transducer element for environment sensing leaves the environment sensing arrangement preferably in the direction of the front side of the front body, also referred to as front mass, wherein rearward radiation is completely suppressed in the best case.
  • the back body also referred to as back mass, for damping the vibration relative to the area in which no radiation is desired.
  • transducer element is to be construed broadly and includes, for example, electro-acoustic transducers which operate on electrostatic, magnetostrictive, piezoelectric effects or combinations of these effects.
  • the transducer element may in particular be a piezoelectric element and the
  • Environment sensing device can be understood as a piezoelectric environment sensing device or as a piezoelectric environment sensing device.
  • the so-called membrane of the environmental sensing device is formed for example by an outer skin of a bumper, side mirror or door region of a motor vehicle, wherein the transducer element or the transducer elements and the or
  • the membrane forms a resonance membrane of whysensier observed.
  • the membrane is formed from a thin layer of material, which is made for example from a customary for the outer skin of a motor vehicle polymer material.
  • the membrane preferably has a thickness of between 0.1 mm and 4 mm, particularly preferably less than 1 mm.
  • the coupling of the resonator at the end face with the membrane can be done directly or indirectly, but in any case so that an acoustic coupling is sufficiently possible, so that acoustic radiation patterns can be transmitted.
  • the direct coupling can be accomplished for example by a press fit, press fit, such as by screwing, or by an adhesive.
  • Indirect coupling may mean that another layer of material is provided between the resonator body and the membrane, for example, a liquid such as a gel or an oil. This additional material layer can be provided in particular to the acoustic coupling between the
  • the resonance body has at least partially between its plate-shaped end face and the transducer element a width dimension which is smaller than the width dimension of the end face. Accordingly, a paragraph or a stage between the
  • plate-shaped end face refers to a part or portion of the front body, which is located directly on its side facing the membrane and which is in the form of a plate, that is called its dimension in width, also called width dimension, greater than its dimension in
  • the resonating body preferably has a T-shaped longitudinal section, a double-T-shaped longitudinal section, also called a dumbbell-shaped longitudinal section, or a longitudinal section in the form of a triangle, which merges into the plate form at its front-side tip. This can be achieved that the flexural rigidity of the membrane, such as in the case of the outer skin of a car bumper than
  • Membrane according to the invention not only by the material of the bumper is defined, but also by the ultrasonic transducer or by its structural design, that is, the plate shape of the front side of the front body.
  • the design of the front body as a rod undesirably severely deforms the membrane.
  • this changes the structural characteristics of the bumper this undesirably affects the resonant frequency of the structure. Because of this, it makes sense that
  • Inventive environment sensing device are advantageously influenced by the plate of the resonator.
  • the measure of influence is of the
  • Rigidity ratio of outer skin to front body plate dependent If the ratio is small, the temperature influence by the material of the outer skin is low. If, for example, a metal or a plastic with a fiber content is used as the front body, the stiffness at the same thickness ratios is quite large.
  • the thickness ratio must be chosen so that the influence of the outer skin is sufficiently low. Provided that the thickness of the outer skin does not correspond to the previously described, for the acoustic transmission preferred thicknesses, it can be provided that the bumper of the
  • Dilutions can be incorporated both by subsequent machining, for example by milling, or even in the manufacturing process, for example in injection molding. Furthermore, the directional characteristic of the ultrasonic transducer of the invention
  • the cross section corresponds to the plate-shaped end face of the front body of a corresponding
  • a rectangular shape in particular a square shape or the shape of a rectangle with rounded corners, in particular with different dimensions for different directional characteristics in the horizontal and / or vertical direction; or
  • the transducer element and the resonance body are biased by at least one tensioning element to pressure, preferably in the order rear body, transducer element, front body.
  • a clamping element can be a screw or the like.
  • Transducer element can act. However, since especially tensile stresses can lead to damage to the piezoceramic, the arrangement is biased by, for example, a screw on pressure, so that the ultrasonic transducer can be subjected to more stress.
  • a covert assembly such as behind a plastic paneling of a bumper
  • a covert assembly such as behind a plastic paneling of a bumper
  • These thickness vibrators usually consist of several elements, which are often made of metal, ceramic, piezoceramic or plastic.
  • the materials mentioned have in common that they do not have sufficient for the application material damping. Accordingly, it is further preferred in the environmental sensing device according to the invention that it further comprises a damping mechanism for damping the vibration of the resonance body in the otherwise weakly damped system.
  • the damping mechanism may be formed by protrusions on the front body and / or the rear body which are supported in a vibration damping material, preferably a silicone based material such as, for example
  • Silicone foam or the like can be used, such as the commercially available silicone foam Fermasil.
  • the front body with ribs or other protruding geometries, such as knobs or wings or the like, provided it is in a Vibration of the ultrasonic transducer and thus a vibration of the resonator body, the damping material compressed and attenuated the vibration of the front body by the vibration damping material.
  • Such ribs or alternative protruding geometries may also be attached to the rear body.
  • a plastic or rubber material can be selected for the front body, wherein the rear body can be made of, inter alia, a metal, for example aluminum, sheet metal, steel or brass.
  • a metal for example aluminum, sheet metal, steel or brass.
  • the selection of suitable materials may be limited by restrictions or requirements regarding the
  • Receive sensitivities or transmission signal strengths of the environment sensing device be set.
  • other environmental influences such as, for example, the ambient temperature or, for example, the mechanical stress due to shaking, can also be taken into account in order to determine suitable materials.
  • the damping mechanism in the environmental sensing device, can also be implemented by virtue of the fact that the front body and / or the rear body of the resonance body consist of at least one composite material, also called a composite material.
  • the resonator body can be made by means of various production methods to such a composite body or a composite of such composite body, including by the following methods:
  • both the front body and the back body can be made by one of the above manufacturing methods.
  • both the front body and the back body may be manufactured by one of the above manufacturing methods.
  • different methods of preparation of the front body and the rear body can be used.
  • various methods of fabrication may be used in one of the front body and the rear body or in both the front body and the rear body.
  • the transducer element and the resonance body are coupled together by a press fit or by gluing.
  • Coupling can be determined by the expected field of application, for example by specifying the shake resistance of the arrangement.
  • damping mechanisms may be provided in addition to the connection points between the diaphragm and the front body, the front body and the piezoelectric element, and / or the piezoelectric element and the rear body in, for example, the gluing or the clamping contact.
  • a resonator manufactured in this way is particularly suitable for all vehicles or moving machines which generally use environmental sensing.
  • the invention can be used in particular in those environmental sensors which are provided, for example, in the front and / or rear bumper of a vehicle for the purpose of parking assistance and / or collision avoidance. Typically, this will be
  • Ultrasonic transducers are used, which can both emit ultrasonic waves and receive ultrasonic waves. But it can also be provided, the
  • a motor vehicle having a bumper, side mirror or door section and a surrounding sensing device as described above, wherein the membrane of the surrounding sensing device is formed by an outer skin of the bumper, the side mirror or the door section, and wherein the ultrasonic transducer, that is, the transducer element and the resonance body , hidden behind the outer skin are arranged.
  • the environment-sensing device can in one
  • Ultrasonic system to be installed which comprises a group of Ultraschallensiinditch, wherein at least one, preferably all Ultraschallensiinditch the previously described features of the environment sensing device comprise.
  • the ultrasound system may, for example, be adapted to a sub-environment of the
  • the front-side ultrasonic sensors may detect a vehicle front-end environment and / or the vehicle
  • Ultrasonic sensors in the side area for detecting a side area of the vehicle and / or the ultrasonic sensor devices in the rear area for detecting a rear environment of the vehicle are each assigned to such an ultrasound system. Typically, this will be four to six
  • Ultraschallensiichtonne mounted in a bumper with only a maximum of four Ultraschallensiindonne are mounted with approximately the same direction of view.
  • ultrasonic sensors are also positioned in the front bumper so that they have their detection area to the left and to the right.
  • ultrasonic sensors may also be positioned in the rear bumper so that they detect an area to the left and right of the motor vehicle.
  • the ultrasound system furthermore has a control device assigned to the respective group and a signal processing device. To capture the side area of the vehicle, both side mounted in the front and rear bumper
  • Ultrasonic sensing devices are used as well.
  • Ultraschallensiindungen which are installed in a side mirror or in a door section.
  • Automotive bumpers today consist mainly of plastics which have a comparatively high stiffness change over the temperature. As a result, the resonant frequency of the environmental sensing system may undesirably move. On the other hand, if the transmission frequency is constant, this leads to losses in the transmission and reception mode, since resonance is no longer transmitted.
  • Conversion device can now converter concepts are implemented, which can be mounted behind the bumper of a motor vehicle invisible and stimulate a part of the bumper to vibrate, which in turn emits corresponding sound waves.
  • a better design of the ultrasonic transducer is achieved, so that the property change of the bumper material has the least possible influence on the resonance frequency.
  • the constructive design of the front body according to the invention makes it possible to influence the directional characteristic of the ultrasound transducer and thus the environment sensing device according to the invention, wherein the desired directional characteristic and resonant frequency can be adjusted by different geometry parameters of the proposed design.
  • the present invention at least in the course of a preferred embodiment of the environmental sensing device according to the invention, further allows a
  • vibration-damping components can be achieved, space for the environment sensing device according to the invention can be reduced, and an undesirable
  • Vibration initiation in adjacent structures can be prevented, since due to the avoidance of additional damping materials, which are umgössen around the resonator, no connection is made to the housing.
  • FIG. 1 shows a longitudinal section of a basic structure of a first preferred
  • Embodiment of the environment sensing device according to the invention in undeflected state shows a longitudinal section of a basic structure of the first preferred embodiment of the environmental sensing device according to the invention shown in FIG. 1 in the deflected state;
  • Fig. 3 is a longitudinal section of a basic structure of a second preferred
  • Embodiment of the environment sensing device according to the invention in undeflected state Embodiment of the environment sensing device according to the invention in undeflected state
  • Fig. 4 is a longitudinal section of a basic structure of a third preferred
  • Embodiment of the environment sensing device according to the invention in undeflected state Embodiment of the environment sensing device according to the invention in undeflected state
  • Fig. 5 is a longitudinal section of a basic structure of a fourth preferred
  • Embodiment of the environment sensing device according to the invention in undeflected state Embodiment of the environment sensing device according to the invention in undeflected state
  • Fig. 6 is a longitudinal section of a basic structure of a fifth preferred
  • Embodiment of the environment sensing device according to the invention in undeflected state Embodiment of the environment sensing device according to the invention in undeflected state
  • Fig. 7 is a longitudinal section of a basic structure of an ultrasonic transducer according to the prior art.
  • Fig. 1 shows an environment sensing device 1 according to a first preferred
  • Embodiment of the invention in lateral cross-sectional view in a non-activated state.
  • the environmental sensing device 1 comprises an ultrasonic transducer 1 1 and a diaphragm 12, wherein the ultrasonic transducer 1 1 consists of a compound of a front body 1 1 1, a transducer element 1 12 and a rear body 1 13, in this order.
  • the front body 1 1 1 is with one of the membrane 12 facing end face 1 1 1 1, also called end portion 1 1 1 1 or end portion 1 1 1 1, coupled to the membrane 12. This means that in the illustrated embodiment, the end face 1 1 1 1 forms a contact surface to the membrane 12.
  • the coupling between the front body 1 1 1 and the membrane 12th can be done directly and indirectly, which is referred to with an indirect contact, that between the end face 1 1 1 1 and the membrane 12 at least one layer of another material is arranged, for example, a liquid layer such as oil or gel to improve the acoustic coupling ,
  • a liquid layer such as oil or gel to improve the acoustic coupling
  • Between the end face 1 1 1 1 and the membrane 12 may alternatively be a mechanical coupling, for example, by a screw or a jamming of the front body 1 1 1 in the membrane 12, or the front body 1 1 1 may also be glued to the membrane 12
  • the membrane 12 is formed thinner in this embodiment in a contact area between the end face 1 1 1 1 and membrane 12 as outside the contact area, so that the
  • Front body 1 1 1 in the contact area in a recess 121 in the membrane 12 is at least partially sunk.
  • the front body 1 1 1 is in the first preferred embodiment, as seen in Figures 1 and 2, formed in section in a double-T-shape, wherein the end face 1 1 1 1 of the front body 1 1 1 is plate-shaped, the is called a plate or plate-like. Further, the entire ultrasonic transducer 1 1 in this
  • Design rotationally symmetrical which means that both the cross section of the front body 1 1 1, the cross section of the transducer element 1 12 and the cross section of the rear body 1 13 form a circular shape.
  • the cross section of one of these components or all of these components may also have an ellipse shape, a rectangular shape, in particular a square shape or the shape of a rectangle with rounded corners, or a combination of the aforementioned geometric shapes.
  • the end face 1 1 1 1 1 or end portion 1 1 1 1 1 of the front body 1 1 1 also has a circular shape, whereby the end face 1 1 1 1 1 of the front body 1 1 1 1 takes the form of a disc in this embodiment.
  • the recess 121 of the membrane 12 corresponds to the cross-sectional shape of the end face 1 1 1 1 of the front body 1 1 1.
  • the resonator 1 1 1, 1 13 in this embodiment of a front body 1 1 1 1 of a metal and / or polymer and from a Rear body 1 13 constructed of metal and / or polymer.
  • FIG. 2 shows the environmental sensing device 1 according to the first preferred embodiment of the invention in a lateral sectional view in an activated state.
  • Environment sensing device 1 is of the stiffness ratio of membrane too
  • FIG. 3 is an environment sensing device 2 according to a second preferred
  • Embodiment of the invention shown in side sectional view in a non-activated state.
  • the environment sensing device 2 comprises an ultrasonic transducer 21 and a diaphragm 22, the ultrasonic transducer 21 consisting of a combination of a front body 21 1, a transducer element 212 and a rear body 213, in this order.
  • the front body 21 1 is connected to one of the membrane 22 facing end face 21 1 1 with the
  • the membrane 22 is made thinner in a contact area between the end face 21 1 1 and the membrane 22 than outside the contact area, so that the front body 21 1 is at least partially sunk in the contact area in a recess 221 in the membrane 22.
  • the front body 21 1 is formed in the second preferred embodiment in section in a T-shape, wherein the end face 21 1 1 of the front body 21 1 is plate-shaped.
  • Ultrasonic transducer 21 has the same structure as the ultrasonic transducer 1 1 of the first preferred embodiment, the rear side is missing the back or the
  • the End face 21 1 1 or end portion 21 1 1 of the front body 21 1 a circular shape, whereby the end face 21 1 1 of the front body 21 1 also takes the form of a disc in this embodiment.
  • the recess 221 of the membrane 22 corresponds to the cross-sectional shape of the end face 21 1 1 of the front body 21 1.
  • the resonating body 21 1, 213 is in this case
  • a front body 21 1 made of a metal and / or a polymer and a back body 212, also constructed of metal and / or polymer.
  • Fig. 4 shows an environment sensing device 3 according to a third preferred
  • Embodiment of the invention in side sectional view in a non-activated state.
  • the environmental sensing device 3 comprises an ultrasonic transducer 31 and a diaphragm 32, wherein the ultrasonic transducer 31 is made of a compound of a front body 31 1, a transducer element 312 and a rear body 313.
  • the front body 31 1 is coupled to the diaphragm 32 facing end face 31 1 1 with the membrane 32.
  • the membrane 32 is made thinner in a contact region between the end face 31 1 1 and the membrane 32 than outside the contact region, so that the front body 31 1 is at least partially recessed in the contact area in a recess 321 in the membrane 32.
  • the front body 31 1 is in the third preferred
  • the ultrasonic transducer 31 has the same structure as the ultrasonic transducer 31 of the second preferred
  • the end face 31 1 1 or end portion 31 1 1 of the front body 31 1 has a circular shape, whereby the end face 31 1 1 of the front body 31 1 takes the form of a disc in this embodiment.
  • the central part 31 12 also has a circular shape in cross-section, resulting in a conical shape or conical shape of the central part 31 12 results.
  • the recess 321 of the membrane 32 again corresponds to the cross-sectional shape of the end face 31 1 1 of the front body 31 1.
  • the resonance body 31 1, 313 is in this embodiment a front body 31 1 made of a metal and / or polymer and a back body 312 made of metal and / or polymer.
  • an environment sensing device 4 according to a fourth preferred
  • Embodiment of the invention shown in side sectional view in a non-activated state.
  • the environment sensing device 4 comprises an ultrasonic transducer 41 and a diaphragm 42, the ultrasonic transducer 41 being composed of a connection of a front body 41 1, a transducer element 412 and a rear body 413.
  • the front body 41 1 is coupled to the diaphragm 42 facing end face 41 1 1 with the membrane 42.
  • the membrane 42 is made thinner than in a contact area between the end face 41 1 1 and the membrane 42
  • the front body 41 1 is formed in the fourth preferred embodiment in section in a double T-shape, similar to the preferred first embodiment shown in Figures 1 and 2, wherein the end face 41 1 1 of the front body 41 1 is also plate-shaped.
  • the ultrasonic transducer 41 has generally the same structure as the ultrasonic transducer 1 1 of the first preferred
  • the diameter of the cross section of the end face 41 1 1 is greater than the cross section of a central portion 41 12 of the front body 41 1 and approximately the same size as the cross section of a back 41 13 of the front body 41, and wherein in each case between the end face 41 1 1 and Middle part 41 12 and between the middle part 41 12 and rear side 41 13 of the front body 41 1 a paragraph is provided, so that the double-T shape of the front body 41 1 comes about.
  • the end face 41 1 1 or end portion 41 1 1 of the front body 41 1 has a circular shape, whereby the
  • End face 41 1 1 of the front body 41 1 assumes the form of a disc in this embodiment.
  • the recess 421 of the membrane 42 corresponds to the cross-sectional shape of the end face 41 1 1 of the front body 41 1.
  • the resonance body 41 1, 413 is in this embodiment
  • the screw 414 passes through in the rear body 413 and the Transducer element 412 provided holes and is bolted to a introduced in the front body 41 1 internal thread.
  • an environment sensing device 5 according to a fifth preferred embodiment of the invention is shown in side sectional view in a non-activated state.
  • the environment sensing device 5 includes an ultrasonic transducer 51 and a diaphragm 52, wherein the ultrasonic transducer 51 is made of a compound of a front body 51 1, a transducer element 512 and a rear body 513.
  • the front body 51 1 is coupled to the membrane 52 facing the end face 51 1 1 with the membrane 52.
  • the membrane 52 is made thinner in a contact region between the end face 51 1 1 and the membrane 52 than outside
  • the front body 51 1 is formed in the fifth preferred embodiment in section in a basic double T-shape, wherein the end face 51 1 1 of the front body 51 1 is plate-shaped.
  • Ultrasonic transducer 51 has the same structure as the ultrasonic transducer 1 1 of the first preferred embodiment, wherein the diameter of the cross section of the end face 51 1 1 greater than the cross section of a central portion 51 12 of the front body 51 1 and approximately the same size as the cross section of a back 51 of the front body 51, and wherein in each case between the end face 51 1 1 and the middle part 51 12 and between the middle part 51 12 and back 51 13 of the front body 51 1 a paragraph is provided, so that a double-T shape of the front body 51 1 is formed.
  • the rib structure 51 14 is characterized by a
  • the damping material container 61 is attached to the membrane 52, for example by gluing, so that the recess 521 of the membrane 52 together with the
  • Ultrasonic transducer 51 is completely enclosed.
  • the end face 51 1 1 or end portion 51 1 1 of the front body 51 1 has a circular shape, whereby the end face 51 1 1 of the front body 51 1 takes the form of a disc in this preferred embodiment.
  • the recess 521 of the membrane 52 corresponds to the cross-sectional shape of the end face 51 1 1 of the front body 51 1.
  • the resonator 51 1, 513 is constructed in this embodiment of a front body 51 1 made of a sintered metal with admixed steam-enhancing materials and a back body 512 made of a polymer material to one through the
  • Damping mechanism 6 provided damping property of

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

La présente invention concerne un dispositif de détection d'environnement comprenant un transducteur ultrasonore pourvu d'au moins un élément transducteur et d'au moins un corps de résonance, ainsi qu'une membrane pour la transmission de sons, le dispositif de détection d'environnement selon l'invention étant conçu pour envoyer et/ou recevoir des signaux ultrasonores. Le corps de résonance comporte une partie avant et une partie arrière et est relié à la membrane par une face de la partie avant, la face de la partie avant reliée à la membrane se présentant en forme de plaque. La présente invention concerne en outre un véhicule automobile équipé d'un pare-chocs, d'un rétroviseur latéral ou d'une partie de porte et d'au moins un dispositif de détection d'environnement de ce type, la membrane du dispositif de détection d'environnement étant formée par une peau extérieure du pare-chocs, du rétroviseur latéral ou de la partie de porte et le transducteur ultrasonore étant dissimulé derrière cette peau extérieure.
EP14727792.5A 2013-06-20 2014-05-26 Dispositif de détection d'environnement comprenant un transducteur ultrasonore et véhicule automobile équipé d'un dispositif de détection d'environnement de ce type Withdrawn EP3010654A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013211606.3A DE102013211606A1 (de) 2013-06-20 2013-06-20 Umfeldsensiereinrichtung mit Ultraschallwandler, und Kraftfahrzeug mit einer derartigen Umfeldsensiereinrichtung
PCT/EP2014/060759 WO2014202333A1 (fr) 2013-06-20 2014-05-26 Dispositif de détection d'environnement comprenant un transducteur ultrasonore et véhicule automobile équipé d'un dispositif de détection d'environnement de ce type

Publications (1)

Publication Number Publication Date
EP3010654A1 true EP3010654A1 (fr) 2016-04-27

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DE102016101007B4 (de) * 2016-01-21 2022-12-01 Valeo Schalter Und Sensoren Gmbh Ultraschallsensor für ein Kraftfahrzeug mit wasserundurchlässiger Abdeckeinrichtung, Fahrerassistenzsystem sowie Kraftfahrzeug
DE102016107471B3 (de) * 2016-04-22 2017-09-14 Krohne Ag Ultraschallwandler mit Abstrahlelement
CN106766700A (zh) * 2016-12-04 2017-05-31 吴申龙 一种利用光热和超声干燥木材用的温室
DE102018201832A1 (de) * 2018-02-06 2019-08-08 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Bamberg Tür eines Kraftfahrzeugs
CN111551944A (zh) * 2020-06-01 2020-08-18 中国第一汽车股份有限公司 一种隐藏式雷达总成及车辆
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DE102013211606A1 (de) 2014-12-24
WO2014202333A1 (fr) 2014-12-24

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