WO2016175327A1 - Capteur à ultrasons - Google Patents

Capteur à ultrasons Download PDF

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Publication number
WO2016175327A1
WO2016175327A1 PCT/JP2016/063499 JP2016063499W WO2016175327A1 WO 2016175327 A1 WO2016175327 A1 WO 2016175327A1 JP 2016063499 W JP2016063499 W JP 2016063499W WO 2016175327 A1 WO2016175327 A1 WO 2016175327A1
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WO
WIPO (PCT)
Prior art keywords
ultrasonic sensor
piezoelectric vibrator
ultrasonic
cylindrical
bumper
Prior art date
Application number
PCT/JP2016/063499
Other languages
English (en)
Japanese (ja)
Inventor
陽二 東
尚広 堀田
齊藤　直人
亨 羽田
田中　正吉
大矢　茂正
伊藤　智彦
鈴木　貴博
繁雄 小林
Original Assignee
日清紡ホールディングス株式会社
日本無線株式会社
上田日本無線株式会社
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 日清紡ホールディングス株式会社, 日本無線株式会社, 上田日本無線株式会社 filed Critical 日清紡ホールディングス株式会社
Publication of WO2016175327A1 publication Critical patent/WO2016175327A1/fr

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    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/48—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects combined with, or convertible into, other devices or objects, e.g. bumpers combined with road brushes, bumpers convertible into beds

Definitions

  • the present invention relates to an ultrasonic sensor.
  • the present invention is particularly advantageous for detecting the position of a person or an object that is mounted on the surface of a flat substrate such as a bumper of an automobile and exists in a space opposite to the mounting surface of the ultrasonic sensor.
  • the present invention relates to an ultrasonic sensor that can be used for the above.
  • the present invention also provides a position of a human or an object existing in a space in contact with the surface opposite to the mounting surface of the ultrasonic sensor, including the flat substrate and the ultrasonic sensor mounted on the surface of the flat substrate. It also relates to an ultrasonic detection device that can be advantageously used for detection.
  • an ultrasonic sensor is attached to the bumper of the automobile and the ultrasonic wave is installed.
  • the presence of humans and objects by transmitting ultrasonic waves from the sensor toward the space where humans and objects are expected, and then receiving the ultrasonic waves reflected from the humans and objects by the ultrasonic sensor
  • Various ultrasonic detectors used for detecting the position of the sensor have already been developed and are actually used.
  • an ultrasonic sensor one having a structure in which a piezoelectric vibrator having an ultrasonic transmission / reception function is built in a casing is generally used.
  • a method of attaching the ultrasonic sensor to the bumper of the automobile As a method of attaching the ultrasonic sensor to the bumper of the automobile, a method of joining and fixing the ultrasonic sensor to the front surface of the bumper (the surface opposite to the surface facing the automobile body), forming a hole in the bumper, There are known a method in which an ultrasonic sensor is mounted in the hole, and a method in which the ultrasonic sensor is bonded and fixed to the back side surface of the bumper (the surface facing the automobile body).
  • the ultrasonic detection system configured by bonding and fixing the ultrasonic sensor to the front surface of the bumper, but there is no ultrasonic problem on the front surface of the bumper. Since the sensor protrudes, an aesthetic problem occurs in the appearance of the bumper.
  • the ultrasonic sensor protruding from the bumper surface is easily damaged by contact with an object such as another automobile or a human being.
  • an ultrasonic detection system configured using a method in which a hole is formed in a bumper and an ultrasonic sensor is mounted in the hole, the formation of the hole in the bumper itself has aesthetic resistance. Also, it is not preferred because it leads to a decrease in the mechanical strength of the bumper.
  • an ultrasonic detection system configured by bonding and fixing an ultrasonic sensor to the backside surface of the bumper does not show the presence of the ultrasonic sensor when the automobile is observed from a normal position, and the mechanical strength of the bumper.
  • This is a preferred form because it does not cause the problem of lowering.
  • the ultrasonic wave transmitted from the ultrasonic sensor passes through the bumper and propagates to the front space, it also causes a minute vibration of the bumper, so that the ultrasonic sensor shows a preferable vibration mode and directivity.
  • the signal characteristics of the ultrasonic wave transmitted after adjustment changes due to the passage of the bumper, and the ultrasonic wave transmitted to the space in front of the bumper does not easily exhibit the desired directivity.
  • Patent Document 1 discloses a component having a continuous substantially flat member and a surface forming a hole as an acoustic transmission or reception device particularly suitable for use as an auxiliary means for parking. The surface is attached to the flat member around the entire hole, a component that causes a portion of the member to cover the hole, and movement of the portion of the member is converted into an electrical signal;
  • An acoustic transmission or reception device is disclosed, comprising an acoustic transducer attached to the portion so as to be vice versa.
  • this patent document 1 describes that the acoustic transmission or reception apparatus having the above-described configuration is such that an acoustic signal having a predetermined beam width is transmitted through a member such as a bumper with a relatively low loss. Is seen.
  • the acoustic transmission or reception device described in Patent Document 1 is mainly intended for an ultrasonic detection device configured by mounting an ultrasonic sensor on the back surface of a bumper (bumper bar).
  • the drive bar of the acoustic transducer is bonded to the back surface of the sensor and is attached and fixed by ultrasonic welding around its edge, and the wall thickness of the drive bar is not contacted with the drive bar.
  • a flat member, which is a wall body, is disposed, and is ultrasonically welded to the bumper.
  • Patent Document 1 such a configuration suppresses the vibration of the bumper due to the acoustic energy such as the ultrasonic wave propagated from the drive bar of the acoustic transducer to the bumper, and has a predetermined beam width. It is described that the signal is transmitted through a member such as a bumper with relatively low loss.
  • Patent Document 2 discloses an ultrasonic sensor as an ultrasonic sensor capable of ensuring good directivity even when an ultrasonic sensor is housed in a housing and attached to the back surface of a vehicle bumper or a resin portion.
  • a piezoelectric vibrator (ultrasonic vibrator) for transmitting and receiving and housing the piezoelectric vibrator, the piezoelectric vibrator being in contact with the inner surface of the bottom surface portion and being fixed, and the outer surface of the bottom surface portion being A housing that contacts the inner surface of the vehicle bumper or the resin portion, and the housing is in contact with the vehicle bumper or the resin portion and the piezoelectric vibrator at a part of a bottom surface portion of the housing.
  • an ultrasonic transmission portion made of a material having an acoustic impedance intermediate between the acoustic impedance of the piezoelectric vibrator and the acoustic impedance of the vehicle bumper or resin portion.
  • an ultrasonic sensor which is characterized in that through the ultrasonic transmission unit and said vehicle bumper or the resin portion is described.
  • an ultrasonic sensor mounted on a bumper of an automobile is mounted on the back side (inside) of the bumper.
  • the temperature and humidity are always constant. Performance degradation is likely to occur because it is placed in contact with the changing and severe external environment.
  • the ultrasonic sensor mounted on the bumper vibrates together with the vibration of the bumper during driving of the automobile. For this reason, there is a problem that an ultrasonic sensor, which is a precision instrument, is liable to cause a problem while being mounted on a bumper.
  • an ultrasonic sensor is obtained by combining a unit including a piezoelectric vibrator (piezoelectric vibrator unit) and a unit including a cylindrical wall body made of a rigid material containing the piezoelectric vibrator (cylindrical wall body unit). After the separation, the cylindrical wall unit is bonded and fixed to the surface of a flat substrate such as a bumper.
  • piezoelectric vibrator unit piezoelectric vibrator unit
  • cylindrical wall body unit made of a rigid material containing the piezoelectric vibrator
  • the piezoelectric vibrator unit is fixed to the surface of the flat substrate in a detachable manner.
  • a failure occurred or the occurrence of the failure was feared without removing the cylindrical wall unit bonded and fixed to the surface of the flat substrate.
  • the present invention has been achieved.
  • the present invention is an ultrasonic sensor capable of exchanging piezoelectric vibrators, including the following members.
  • a piezoelectric vibrator that is detachably fixed to the surface of the flat substrate with or without a buffer layer in between, a housing that accommodates the piezoelectric vibrator, and has an opening on the bottom surface.
  • a cylindrical housing having a closed surface, a first elastic body inserted between a top surface of the piezoelectric vibrator and a lower side surface of the top portion of the cylindrical housing, and the cylindrical housing in a non-contact state
  • a rigid material cylindrical wall body that is provided with a detachable lid at the top and has a joint surface to the flat substrate at the bottom, and a lid of the rigid wall made of the rigid material
  • a second elastic body inserted between the lower surface and the top surface of the cylindrical housing.
  • the piezoelectric vibrator is a columnar or disk-shaped piezoelectric ceramic sintered body having an electrode layer on each of a top surface and a bottom surface.
  • the buffer layer is an acoustic matching layer.
  • a cylindrical buffer sheet made of an elastic material is mounted on the side surface of the piezoelectric vibrator.
  • the cylindrical buffer sheet is formed of silicone rubber.
  • the rigid-material cylindrical wall body has a base fixing portion having a relatively large wall thickness extending upward from the joint surface to the flat base and a relatively small wall thickness extending upward from the base fixing portion. It consists of an extension part with.
  • the first elastic body is a spring, a rubber material molded body, or a cork material.
  • the second elastic body is a spring or a rubber material molded body.
  • the present invention also resides in the following ultrasonic detector equipped with the ultrasonic sensor of the present invention described above.
  • An ultrasonic detection device comprising the surface of a flat substrate and the ultrasonic sensor of the present invention joined at the bottom surface of a cylindrical wall made of a rigid material, the piezoelectric vibration housed in the ultrasonic sensor
  • An ultrasonic detector capable of exchanging a piezoelectric vibrator characterized in that the bottom surface of the element is fixed to the surface of the flat substrate in a close contact state with or without a buffer layer therebetween, and detachable apparatus.
  • the ultrasonic sensor of the present invention can be easily mounted on the surface of a bumper or the like of an automobile, in particular, the back side surface. In particular, even when mounted on the back side surface of a bumper of an automobile, the ultrasonic sensor Therefore, the directivity and energy efficiency of the ultrasonic waves transmitted to the front space beyond the bumper are hardly reduced. Furthermore, the ultrasonic sensor of the present invention includes a unit including a piezoelectric vibrator (piezoelectric vibrator unit) and a unit including a cylindrical wall body made of a rigid material that houses the piezoelectric vibrator (cylindrical wall body unit).
  • FIG. 3 is a perspective view showing a state in which the transducer-exchangeable ultrasonic sensor of the present invention is fixed to the surface of a flat substrate (that is, an ultrasonic detection device). It is a schematic diagram which shows another structural example of the vibrator
  • FIG. 1 is a schematic diagram (a diagram shown in the form of a cross-sectional view) showing a typical configuration example of the transducer-exchangeable ultrasonic sensor of the present invention.
  • a vibrator-exchangeable ultrasonic sensor 10 includes a unit (piezoelectric vibrator unit) including a piezoelectric vibrator 11 as a main functional component, and a cylindrical wall made of a rigid material that houses the piezoelectric vibrator.
  • a unit including the body 12 (cylindrical wall unit) is configured as a basic component.
  • the piezoelectric vibrator 11 a columnar or disk-shaped piezoelectric ceramic sintered body having electrode layers on the upper surface (top surface) and the lower surface (bottom surface) is generally used.
  • the “columnar” piezoelectric ceramic sintered body means a piezoelectric ceramic sintered body having a shape such as a cylinder, an elliptical column, or a rectangular column having a height of 1 or more with respect to the diameter of the bottom surface.
  • the diameter when the shape of the bottom surface is not a perfect circle means the diameter obtained by converting the area of the bottom surface as the area of the circle.
  • the disk-shaped piezoelectric ceramic sintered body means a piezoelectric ceramic sintered body having a shape such as a disk having a height less than 1 with respect to the diameter of the bottom surface, an elliptical disk-shaped body, or a polygonal disk-shaped body. To do.
  • a columnar or disk-shaped sintered body As the columnar or disk-shaped piezoelectric ceramic sintered body, a columnar or disk-shaped sintered body is usually used, but in order to adjust the directivity of ultrasonic waves generated by the piezoelectric vibrator, it is arranged along the bottom surface.
  • a columnar or disk-shaped sintered body having a square or rectangular cross section may be used.
  • piezoelectric ceramic materials include known piezoelectric ceramic materials such as lead zirconate titanate (PZT), lead titanate, lead zirconate, and barium titanate.
  • the sintered body of the piezoelectric ceramic material may or may not be porous. However, considering the performance as a piezoelectric vibrator, particularly excellent high-frequency characteristics and low acoustic impedance, it is porous.
  • the sintered body is preferably used.
  • a sintered body having pores in an average diameter range of 1 to 100 ⁇ m in a dispersed state and a porosity (porosity) of 5 to 50% by volume is preferably used.
  • a sintered body of a ceramic material is made into a piezoelectric vibrator by attaching electrode layers to the upper and lower surfaces thereof.
  • the electrode layers on the upper and lower surfaces are connected to wiring for applying electrical energy to the ceramic material sintered body to generate ultrasonic waves and for electrically extracting received ultrasonic waves (reflected waves).
  • the entry of those electrode layers and wirings is omitted.
  • a piezoelectric material made of various materials other than the ceramic material can be used as a constituent material of the piezoelectric vibrator if necessary.
  • the lower surface (bottom surface) of the piezoelectric vibrator is a soft resin or rubber material, silicone grease, or oily that is effective for facilitating fixing of the piezoelectric vibrator to the surface of a flat substrate such as a bumper. It is preferable to provide a buffer layer 13 formed of a material that is an oily material such as grease. However, the buffer layer 13 is an auxiliary layer for realizing fixation of the piezoelectric vibrator to the surface of the flat substrate, and is for joining the piezoelectric vibrator to the surface of the flat substrate. Therefore, it should not be a layer made of a material that prevents the piezoelectric vibrator from being detached from the surface of the flat substrate by bonding the piezoelectric vibrator to the surface of the flat substrate. As the buffer layer 13, an acoustic matching layer generally used for acoustic matching between the piezoelectric vibrator and another material can be used.
  • the side surface of the piezoelectric vibrator 11 is preferably covered with a cylindrical buffer sheet 14 made of an elastic material such as silicone rubber (especially an elastic resin or a rubber material).
  • a cylindrical buffer sheet 14 made of an elastic material such as silicone rubber (especially an elastic resin or a rubber material).
  • an elastic sheet (elastic tube) 15 made of an elastic material having characteristics different from those of the elastic material constituting the cylindrical buffer sheet is attached to the side surface of the piezoelectric vibrator 11. Is desirable.
  • This elastic sheet (elastic tube) 15 also contributes to the realization of a stable vibration state of the piezoelectric vibrator 11 and also prevents leakage of ultrasonic energy generated by the piezoelectric vibrator 11 from the side surface of the piezoelectric vibrator. It is valid.
  • the elastic sheet (elastic tube) 15 is desirably a sponge-like material in which a large number of bubbles are arranged in a dispersed state.
  • the composite composed of the piezoelectric vibrator 11, the cylindrical buffer sheet 14, and the elastic sheet (or elastic tube) 15 is disposed inside the cylindrical housing 16 and on the outer surface of the elastic sheet (or elastic tube) 15. Contained in contact.
  • the cylindrical housing 16 has an opening on the bottom surface, and the top surface is closed.
  • the cylindrical housing 16 is usually formed from a metal such as aluminum or a hard resin material such as polypropylene resin or ABS resin.
  • an elastic body made of an elastic material such as a rubber material (referred to herein as “first elastic body”). 17 is inserted.
  • the first elastic body 17 functions in order to effectively realize the tight fixation of the bottom surface of the piezoelectric vibrator 11 to the flat substrate surface.
  • the first elastic body 17 also contributes to the realization of a stable vibration state of the piezoelectric vibrator 11 and also prevents leakage of ultrasonic energy generated by the piezoelectric vibrator 11 from the top surface of the piezoelectric vibrator. It is valid.
  • the first elastic body 17 may be formed of a polymer elastic material such as a rubber material (eg, silicone rubber) or a cork material, or may be formed of a spring material such as a coil spring or a leaf spring.
  • the bottom surface of the cylindrical housing 16 has an opening as shown in FIG.
  • the piezoelectric vibrator 11 is disposed at a position where the bottom surface of the piezoelectric vibrator 11 protrudes substantially on the same plane as the opening surface of the bottom surface of the cylindrical housing 16 or slightly below.
  • a washer 18 is disposed at the bottom of the cylindrical housing 16. This washer 18 functions effectively in order to fix it in a stable state without joining the cylindrical housing 16 on the surface of the flat substrate.
  • the washer 18 also has an effect of improving the directivity of the ultrasonic wave generated from the piezoelectric vibrator 11 by limiting the area in the inner periphery to the area near the bottom surface of the piezoelectric vibrator 11 (that is, the directivity angle is changed). It also gives the effect of preventing narrowing.
  • the cylindrical wall body 12 made of a rigid material is a base fixing portion having a relatively large wall thickness extending upward from a joint surface (bottom surface of the cylindrical wall body) to the flat base body. And an extension portion having a relatively small wall thickness extending upward from the base fixing portion.
  • the cylindrical wall body 12 that accommodates the piezoelectric vibrator 11 in a non-contact state is formed of a rigid material and has such a structure, so that the cylindrical wall body can be reliably bonded to the flat substrate surface.
  • the vibration of the flat substrate generated by the vibration of the ultrasonic wave generated by the piezoelectric vibrator 11 and transmitted to the opposite space through the flat substrate (for example, a bumper) is a cylindrical wall body. Therefore, it is possible to effectively confine the ultrasonic directivity.
  • a removable cover 19 is mounted on the top surface of the cylindrical wall 12 made of rigid material.
  • the cylindrical wall body 12 and the lid body 19 are mounted by engaging a thread groove or a concave portion and a convex portion respectively provided on the side surface of the top portion of the cylindrical wall body 12 and the inner surface of the flange portion of the lid body 19. It is done by using.
  • the cylindrical wall body 12 is preferably formed from a rigid material
  • the lid body 19 is also preferably formed from a rigid material.
  • a hard resin material or a metal material such as a polyolefin resin typified by polypropylene resin or polyethylene resin, or ABS resin is used.
  • An elastic body made of an elastic material such as a coil spring (referred to as “in this specification,” between the lower surface of the lid 19 detachably mounted on the top surface of the cylindrical wall body 12 and the cylindrical housing 16. (Referred to as “second elastic body”) 20 is inserted.
  • the second elastic body 20 also functions to realize close contact and fixation of the bottom surface of the piezoelectric vibrator 11 to the flat substrate surface.
  • the second elastic body 20 is usually composed of a combination of a coil spring and a shim ring or a leaf spring, but is made of a rubber material (eg, silicone rubber) or foamed plastic. You may form from a molecular elastic material.
  • the piezoelectric vibrator unit including the piezoelectric vibrator 11 performs a central function (in the ultrasonic sensor shown in FIG. 1, the piezoelectric vibrator 11, the buffer layer 13, the cylindrical buffer sheet 14, the elastic sheet).
  • (Elastic tube) 15 a unit comprising a first elastic body 17 and a cylindrical housing 16), and a cylindrical wall body unit including a cylindrical wall body 12 and a lid body 19 made of a rigid material.
  • the piezoelectric vibrator unit housed inside is taken out, and a new or normal type piezoelectric vibrator unit whose operation has been confirmed is replaced with a cylindrical wall body unit.
  • the piezoelectric vibrator unit can be easily replaced by mounting it inside.
  • FIG. 2 is a perspective view showing an example of a configuration in which the transducer-exchangeable ultrasonic sensor of the present invention is fixed to the surface of a flat substrate (that is, an ultrasonic detection device).
  • a flat substrate that is, an ultrasonic detection device.
  • the ultrasonic sensor of FIG. 2 has substantially the same configuration as the ultrasonic sensor 10 shown in FIG.
  • the ultrasonic sensor 10 is bonded and fixed to a flat substrate (for example, an automobile bumper) 21 at the bottom surface of a cylindrical wall body 12 made of a rigid material.
  • This joining is performed by a method such as adhesion using an adhesive or welding using high-frequency energy.
  • the protrusions 22 formed on the side surface of the cylindrical housing 16 are arranged and fixed inside the cylindrical wall body 12 so that the cylindrical housing 16 is not substantially in contact with the inner side surface of the cylindrical wall body 12. It is the member for separation provided in.
  • a portion for accommodating a control device including the control circuit board 23 is provided on the side of the lid 19.
  • the control device including the control circuit board 23 (including the control circuit chip) is a device that calculates data related to ultrasonic waves transmitted and received by the ultrasonic sensor 10.
  • FIG. 3 is a schematic diagram showing another configuration example of the transducer-exchangeable ultrasonic sensor of the present invention.
  • the ultrasonic sensor shown in FIG. 3 differs from the ultrasonic sensor shown in FIG. 1 in that the shape of the cylindrical wall body 12 is different (that is, the portion where the wall thickness on the bottom side of the cylindrical wall body is large).
  • the wall is extended not to the outer periphery but to the inner periphery), and the vertical dimension of the cylindrical housing 16 is shortened so that the bottom surface of the inner wall of the bottom of the cylindrical wall does not pass through a washer.
  • the ultrasonic sensor having the configuration shown in FIG. 3 has an advantage that the ultrasonic sensor can be miniaturized because the overall width is small, and the use of a washer can be omitted. There are also advantages.
  • a portion having a large wall thickness on the bottom side of the cylindrical wall body extends toward the inner peripheral side, so that the portion is the cylindrical housing of the ultrasonic sensor in FIG.
  • the effect similar to the effect of improving the directivity of the ultrasonic wave shown by the washer 18 arranged in contact with the bottom surface of the 16 is provided.
  • FIG. 4 is also a schematic diagram showing another configuration example of the transducer-exchangeable ultrasonic sensor of the present invention.
  • the ultrasonic sensor having the configuration shown in FIG. 4 has an advantage that since the area of the bottom surface of the cylindrical wall body is large, the cylindrical wall body (and hence the ultrasonic sensor) can be more securely attached to the bumper. There is also an advantage that the use of a washer can be omitted.
  • the ultrasonic sensor having the configuration shown in FIG. 4 has an advantage that since the area of the bottom surface of the cylindrical wall body is large, the cylindrical wall body (and hence the ultrasonic sensor) can be more securely attached to the bumper. There is also an advantage that the use of a washer can be omitted.

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

Abstract

L'invention concerne un capteur à ultrasons qui est installé sur la surface arrière d'un pare-chocs d'une automobile (une surface faisant face à la surface avant de la carrosserie de l'automobile) et est ainsi particulièrement utile pour la détection de la position d'une personne ou d'un objet à proximité de l'automobile. Le capteur à ultrasons comporte les éléments suivants : un vibrateur piézoélectrique remplaçable et étroitement fixé amovible à une surface d'une base en forme de plaque avec ou sans couche d'absorption des chocs entre eux ; un boîtier tubulaire qui abrite le vibrateur piézoélectrique en son sein, a une ouverture dans une surface inférieure de celui-ci, et présente une surface supérieure fermée ; un premier corps élastique inséré entre la surface supérieure du vibrateur piézoélectrique et la surface inférieure de la partie supérieure du boîtier tubulaire ; une paroi tubulaire constituée d'un matériau rigide, ayant une surface jointe à la base en forme de plaque, dans une partie inférieure de celui-ci, ayant un couvercle détachable au niveau d'une partie supérieure de celui-ci, et accueillant le boîtier tubulaire sans contact ; et un second corps élastique inséré entre la surface inférieure du couvercle de la paroi tubulaire constituée du matériau rigide et la surface supérieure du boîtier tubulaire.
PCT/JP2016/063499 2015-04-30 2016-04-28 Capteur à ultrasons WO2016175327A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015092923A JP2018105619A (ja) 2015-04-30 2015-04-30 超音波センサ
JP2015-092923 2015-04-30

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WO2016175327A1 true WO2016175327A1 (fr) 2016-11-03

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Cited By (5)

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CN108551694A (zh) * 2018-03-30 2018-09-18 安徽尼古拉电子科技有限公司 一种汽车雷达的除冰雪装置
WO2019131375A1 (fr) * 2017-12-25 2019-07-04 株式会社ニフコ Ensemble capteur et son procédé de fixation
CN110596684A (zh) * 2019-10-17 2019-12-20 苏州优达斯汽车科技有限公司 一种新型超声波传感器
WO2021031177A1 (fr) * 2019-08-22 2021-02-25 江苏金丰机电有限公司 Automobile à énergie nouvelle basée sur l'internet des véhicules et avec fonction de télémétrie ultrasonore
US20220260712A1 (en) * 2019-06-04 2022-08-18 Tdk Electronics Ag Ultrasonic Transducer and Method for Producing an Ultrasonic Transducer

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JP7455691B2 (ja) 2020-07-21 2024-03-26 株式会社フェローテックマテリアルテクノロジーズ 音響整合部材および超音波探触子

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WO2011090484A1 (fr) * 2010-01-22 2011-07-28 Massa Products Corporation Transducteur ultrasonique camouflé
JP2012033989A (ja) * 2010-07-28 2012-02-16 Murata Mfg Co Ltd 超音波センサ
JP2014227090A (ja) * 2013-05-23 2014-12-08 パナソニック株式会社 超音波装置

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Publication number Priority date Publication date Assignee Title
JP2007114182A (ja) * 2005-09-22 2007-05-10 Denso Corp 超音波センサの取付け構造
JP2009058298A (ja) * 2007-08-30 2009-03-19 Denso Corp 超音波センサ
WO2011090484A1 (fr) * 2010-01-22 2011-07-28 Massa Products Corporation Transducteur ultrasonique camouflé
JP2012033989A (ja) * 2010-07-28 2012-02-16 Murata Mfg Co Ltd 超音波センサ
JP2014227090A (ja) * 2013-05-23 2014-12-08 パナソニック株式会社 超音波装置

Cited By (9)

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WO2019131375A1 (fr) * 2017-12-25 2019-07-04 株式会社ニフコ Ensemble capteur et son procédé de fixation
JPWO2019131375A1 (ja) * 2017-12-25 2020-01-16 株式会社ニフコ センサー部品及びその取付方法
US10983202B2 (en) 2017-12-25 2021-04-20 Nifco Inc. Sensor assembly and mounting method therefor
CN111527416B (zh) * 2017-12-25 2021-11-09 株式会社利富高 传感器组件及其安装方法
CN108551694A (zh) * 2018-03-30 2018-09-18 安徽尼古拉电子科技有限公司 一种汽车雷达的除冰雪装置
CN108551694B (zh) * 2018-03-30 2020-11-24 安徽匠桥科技服务有限公司 一种汽车雷达的除冰雪装置
US20220260712A1 (en) * 2019-06-04 2022-08-18 Tdk Electronics Ag Ultrasonic Transducer and Method for Producing an Ultrasonic Transducer
WO2021031177A1 (fr) * 2019-08-22 2021-02-25 江苏金丰机电有限公司 Automobile à énergie nouvelle basée sur l'internet des véhicules et avec fonction de télémétrie ultrasonore
CN110596684A (zh) * 2019-10-17 2019-12-20 苏州优达斯汽车科技有限公司 一种新型超声波传感器

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