JPH0557997U - Ultrasonic transceiver for vehicle - Google Patents
Ultrasonic transceiver for vehicleInfo
- Publication number
- JPH0557997U JPH0557997U JP11262191U JP11262191U JPH0557997U JP H0557997 U JPH0557997 U JP H0557997U JP 11262191 U JP11262191 U JP 11262191U JP 11262191 U JP11262191 U JP 11262191U JP H0557997 U JPH0557997 U JP H0557997U
- Authority
- JP
- Japan
- Prior art keywords
- opening
- vehicle
- ultrasonic transducer
- ultrasonic
- inclination angle
- 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.)
- Granted
Links
Landscapes
- Transducers For Ultrasonic Waves (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Abstract
(57)【要約】
【目的】 大地からの反射波による誤検知を防止し、し
かもその改良によって開口部に雪や泥等が付着し易く成
るといった新たな問題を発生させない。
【構成】 支持体３は超音波振動子４を収納する収納部
３１と、超音波振動子４の振動面４１を露呈した開口部
３２を有する。開口部３２の上縁側の壁面３２ａの傾斜
角度θ２は水平に対して６０〔度〕以上に設定する。
(57) [Abstract] [Purpose] Prevents erroneous detection due to reflected waves from the ground, and does not cause new problems such as snow or mud becoming easily attached to the openings due to its improvement. [Structure] The support 3 has a housing 31 for housing the ultrasonic transducer 4, and an opening 32 exposing the vibrating surface 41 of the ultrasonic transducer 4. The inclination angle θ2 of the wall surface 32a on the upper edge side of the opening 32 is set to 60 degrees or more with respect to the horizontal.
Description
【０００１】[0001]
この考案は、車両の周囲の物体を超音波によって検知するための車両用超音波 送受信装置の改良に関する。 The present invention relates to an improvement of a vehicle ultrasonic transmitting / receiving device for detecting an object around a vehicle by ultrasonic waves.
【０００２】[0002]
図５は従来の車両用超音波送受信装置を示した縦断面図である。 この装置に於ける支持体１は、超音波振動子２を収納する収納部１１と、該収 納部１１の一端を開口して前記超音波振動子２の振動面２１を露呈した開口部１ ２とを備えている。上記開口部１２はホーン状に開口しており、その傾斜角度θ １を水平に対して例えば約４０〔度〕に設定していた。 同図中の破線Ａは図６に示す大地Ｂからの反射波の進路を示し、破線Ｃは前記 破線Ａで示した反射波が開口部１２の上縁側の壁面１２ａに反射した反射波の進 路を示す。また記号Ｄで示す領域は破線Ｃで示した反射波の拡散領域を示し、実 線Ｅは上記壁面１２ａからの法線を示す。また図６のＦは車両である。 FIG. 5 is a vertical cross-sectional view showing a conventional vehicle ultrasonic transmitting / receiving apparatus. The support 1 in this device has a housing portion 11 for housing the ultrasonic transducer 2 and an opening portion 1 in which one end of the housing portion 11 is opened to expose a vibrating surface 21 of the ultrasonic transducer 2. 2 and. The opening 12 is formed in a horn shape, and its inclination angle θ 1 is set to about 40 degrees with respect to the horizontal. A broken line A in the figure shows the path of the reflected wave from the ground B shown in FIG. 6, and a broken line C shows the direction of the reflected wave shown by the broken line A reflected on the wall surface 12a on the upper edge side of the opening 12. Show the road. The area indicated by the symbol D indicates the diffused area of the reflected wave indicated by the broken line C, and the solid line E indicates the normal line from the wall surface 12a. Further, F in FIG. 6 is a vehicle.
【０００３】[0003]
しかしながら、上記した従来技術の場合、図５に記号Ｄで示すごとく壁面１２ ａによって拡散した反射波が超音波振動子２の振動面２１に入射しており、車両 への搭乗人員が増加するとか荷物の積載重量が増加することによって車高が低く 成った際に、前記振動面２１に対して入射する壁面１２ａの反射波の量が増大し 、誤検知を招来することが有った。すなわち、大地Ｂからの反射波Ａを車両Ｆの 周囲の物体からの反射波と誤認することが有った。 このような問題点を解決するために、例えば、開口部に指向性調整部を設ける ことによって所定方向の指向性を狭くする技術が特開平２―２０２７９８号公報 に開示されている。しかしながら、上記公報に開示した技術では、指向性調整部 に雪や泥等が付着し易く、そのため超音波の送受信が困難に成るとか、音圧レベ ルが著しく減衰するといった欠点が有った。 However, in the case of the above-mentioned conventional technique, the reflected wave diffused by the wall surface 12 a is incident on the vibrating surface 21 of the ultrasonic transducer 2 as indicated by the symbol D in FIG. 5, which may increase the number of passengers in the vehicle. When the vehicle height is lowered due to an increase in the load weight of the luggage, the amount of reflected waves of the wall surface 12a incident on the vibrating surface 21 increases, which may cause erroneous detection. That is, the reflected wave A from the ground B was sometimes mistaken as the reflected wave from an object around the vehicle F. In order to solve such a problem, for example, a technique of narrowing the directivity in a predetermined direction by providing a directivity adjusting portion in the opening is disclosed in Japanese Patent Application Laid-Open No. 2-202798. However, in the technique disclosed in the above publication, there are drawbacks that snow, mud, etc. are likely to adhere to the directivity adjusting section, which makes it difficult to transmit and receive ultrasonic waves and significantly attenuates the sound pressure level.
【０００４】[0004]
この考案は、大地Ｂからの反射波Ａによる誤検知を防止し、しかもその改良に よって開口部に雪や泥等が付着し易く成るといった新たな問題を発生しない車両 用超音波送受信装置を提供することを目的とする。 This invention provides an ultrasonic transmitting / receiving device for a vehicle that prevents erroneous detection due to a reflected wave A from the ground B and does not cause a new problem that snow or mud easily adheres to the opening due to its improvement. The purpose is to do.
【０００５】 そして、上記目的を達成するために、車両の周囲に超音波を発射してその反射 波を検知するための超音波振動子を収納する収納部と、該収納部の一端を開口し て超音波振動子の振動面を露呈した開口部とを備えた支持体を有し、前記支持体 の開口部上縁側の傾斜角度を水平に対して６０〔度〕以上に設定したことを特徴 とする車両用超音波送受信装置を提供する。In order to achieve the above object, an accommodating portion for accommodating an ultrasonic transducer for emitting an ultrasonic wave around the vehicle and detecting a reflected wave thereof, and an opening at one end of the accommodating portion. And a supporting body having an opening exposing the vibrating surface of the ultrasonic transducer, and the inclination angle of the upper edge side of the opening of the supporting body is set to 60 degrees or more with respect to the horizontal. An ultrasonic transmitting / receiving device for a vehicle is provided.
【０００６】[0006]
図１及び図２は、この考案の好適な実施例を示す縦断面図及び正面図である。 同図に於いて、３はプラスチックで成型した支持体である。該支持体３は、超 音波振動子４を収納する収納部３１と、該収納部３１の一端を開口して前記超音 波振動子４の振動面４１を露呈した開口部３２とを備えている。 1 and 2 are a longitudinal sectional view and a front view showing a preferred embodiment of the present invention. In the figure, 3 is a support body made of plastic. The support 3 includes a housing 31 for housing the ultrasonic transducer 4, and an opening 32 having an opening at one end of the housing 31 and exposing a vibrating surface 41 of the ultrasonic transducer 4. There is.
【０００７】 上記開口部３２は、ホーン状に開口しており、上縁側の壁面３２ａの傾斜角度 θ２を水平方向から計測して６０〔度〕以上の角度に設定している。当該実施例 の場合、傾斜角度θ２を６６〔度〕に設定している。 同図に於いて、４２は超音波振動子４の信号線、３３はカバー、３４はグロメ ットである。The opening 32 has a horn-like opening, and the inclination angle θ2 of the wall surface 32a on the upper edge side is set to an angle of 60 degrees or more when measured from the horizontal direction. In the case of this embodiment, the inclination angle θ2 is set to 66 [degrees]. In the figure, 42 is a signal line of the ultrasonic transducer 4, 33 is a cover, and 34 is a grommet.
【０００８】 次に図４に示す特性図をもとに作用を説明する。 図４の横軸は、開口部３２の上縁側の壁面３２ａの傾斜角度θ〔度〕を示し、 縦軸は超音波振動子２が大地Ｂからの反射波Ａを受信したときの超音波送受信装 置に接続した増幅回路（図示せず）が出力する出力信号のピーク電圧Ｖｐ―ｐ〔 Ｖ〕を示している。 該ピーク電圧Ｖｐ―ｐ〔Ｖ〕は、図３に示すごとき出力信号波形の正極側最大 値ないし負極側最大値間の電圧差である。Next, the operation will be described based on the characteristic diagram shown in FIG. The horizontal axis of FIG. 4 indicates the inclination angle θ [degrees] of the wall surface 32a on the upper edge side of the opening 32, and the vertical axis indicates ultrasonic transmission / reception when the ultrasonic transducer 2 receives the reflected wave A from the ground B. The peak voltage Vp-p [V] of the output signal output from the amplifier circuit (not shown) connected to the device is shown. The peak voltage Vp-p [V] is a voltage difference between the positive side maximum value and the negative side maximum value of the output signal waveform as shown in FIG.
【０００９】 上記した図４の特性図から明らかなように、壁面３２ａの傾斜角度θを６０〜 ８０〔度〕程度に設定した場合のピーク電圧Ｖｐ―ｐ〔Ｖ〕は約０．２〔Ｖ〕で あり、傾斜角度θを４０〔度〕に設定した従来技術の場合のピーク電圧Ｖｐ―ｐ 〔Ｖ〕が約０．６〔Ｖ〕で有ったのに比べて約１／３に低減することができる。 ただし傾斜角度θを８０〔度〕以上に設定しても同等の効果が有るが、指向性が 鈍く成って感度が悪く成るので好ましくは無い。As is clear from the characteristic diagram of FIG. 4, the peak voltage Vp-p [V] is about 0.2 [V] when the inclination angle θ of the wall surface 32a is set to about 60 to 80 [degrees]. ] And the peak voltage Vp-p [V] in the case of the prior art in which the inclination angle θ is set to 40 [degrees] is about 0.6 [V], it is reduced to about 1/3. can do. However, even if the inclination angle θ is set to 80 degrees or more, the same effect can be obtained, but it is not preferable because the directivity becomes dull and the sensitivity deteriorates.
【００１０】 上記のごとく、壁面３２ａの傾斜角度θ２を６０〔度〕以上に設定することに より、大地Ｂからの反射波Ａの壁面１２による反射波Ｃの拡散領域Ｄを超音波振 動子４の振動面４１から遠ざけることができ、そのため上記振動面４１に対する 大地Ｂからの反射波Ａの入射量を著しく軽減することができる。As described above, by setting the inclination angle θ2 of the wall surface 32a to 60 [degrees] or more, the diffusion area D of the reflected wave C from the wall surface 12 of the reflected wave A from the ground B is set to the ultrasonic oscillator. 4 from the vibrating surface 41, so that the incident amount of the reflected wave A from the ground B on the vibrating surface 41 can be significantly reduced.
【００１１】 尚、支持体は車両の外装部品、例えばバンパーと一体的に構成してもよい。ま た支持体は、車両の四隅、前方、後方及び側方等のいずれの箇所に設けてもよい 。The support may be integrated with a vehicle exterior component, such as a bumper. Further, the support may be provided at any of four corners of the vehicle, such as the front, the rear, and the side.
【００１２】[0012]
この考案は、叙上の構成・作用を有するので、超音波振動子の振動面に対する 大地からの反射波の入射量が著しく軽減し、大地からの反射波による誤検知を防 止することができる。しかも、その改良によって開口部に雪や泥等が付着し易く 成るといった新たな問題を惹起することがないといった効果を奏する。 Since the present invention has the above-described configuration and operation, the incident amount of reflected waves from the ground on the vibrating surface of the ultrasonic transducer is significantly reduced, and erroneous detection due to the reflected waves from the ground can be prevented. .. Moreover, the effect is that the improvement does not cause a new problem that snow, mud, and the like tend to adhere to the opening.
【図１】この考案の好適な実施例の縦断面図である。FIG. 1 is a vertical sectional view of a preferred embodiment of the present invention.
【図２】図１に示すものの正面図である。FIG. 2 is a front view of what is shown in FIG.
【図３】図１に示す超音波送受信装置に接続した増幅回
路の時間ｔ〔ｓｅｃ〕に対するピーク電圧Ｖｐ―ｐ
〔Ｖ〕の特性図である。FIG. 3 is a peak voltage Vp-p with respect to time t [sec] of an amplifier circuit connected to the ultrasonic transmission / reception device shown in FIG.
It is a characteristic view of [V].
【図４】図１に示す壁面の傾斜角度θ〔度〕と超音波振
動子の出力信号のピーク電圧Ｖｐ―ｐ〔Ｖ〕との関係を
示す特性図である。FIG. 4 is a characteristic diagram showing the relationship between the inclination angle θ of the wall surface shown in FIG. 1 and the peak voltage Vp-p [V] of the output signal of the ultrasonic transducer.
【図５】従来技術を示す縦断面図である。FIG. 5 is a vertical sectional view showing a conventional technique.
【図６】超音波送受信装置を装着した車両の側面図で
る。FIG. 6 is a side view of a vehicle equipped with an ultrasonic transmitting / receiving device.
３ 支持体 ３１ 収納部 ３２ 開口部 ３２ａ 上縁側の壁面 ４ 超音波振動子 ４１ 振動面 θ，θ１，θ２ 傾斜角度 3 Support 31 Storage Part 32 Opening 32a Upper Edge Wall 4 Ultrasonic Transducer 41 Vibration Surface θ, θ1, θ2 Inclination Angle
Claims (1)
波を検知するための超音波振動子を収納する収納部と、 該収納部の一端を開口して超音波振動子の振動面を露呈
した開口部とを備えた支持体を有し、 前記支持体の開口部上縁側の傾斜角度を水平に対して６
０〔度〕以上に設定したことを特徴とする車両用超音波
送受信装置。1. An accommodating portion for accommodating an ultrasonic transducer for emitting an ultrasonic wave around a vehicle and detecting a reflected wave thereof, and a vibrating surface of the ultrasonic transducer having an opening at one end of the accommodating portion. And a supporting body having an opening exposing the opening, and the inclination angle of the supporting body on the upper edge side of the opening is 6 with respect to the horizontal.
An ultrasonic transmitting / receiving apparatus for a vehicle, which is set to 0 [degrees] or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991112621U JP2572947Y2 (en) | 1991-12-26 | 1991-12-26 | Ultrasonic transceiver for vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991112621U JP2572947Y2 (en) | 1991-12-26 | 1991-12-26 | Ultrasonic transceiver for vehicles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0557997U true JPH0557997U (en) | 1993-07-30 |
| JP2572947Y2 JP2572947Y2 (en) | 1998-05-25 |
Family
ID=14591319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1991112621U Expired - Fee Related JP2572947Y2 (en) | 1991-12-26 | 1991-12-26 | Ultrasonic transceiver for vehicles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2572947Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011010494A1 (en) * | 2009-07-21 | 2011-01-27 | パナソニック電工株式会社 | Object detection device and baffle |
| JP2019026077A (en) * | 2017-07-31 | 2019-02-21 | ダイハツ工業株式会社 | Vehicle structure |
-
1991
- 1991-12-26 JP JP1991112621U patent/JP2572947Y2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011010494A1 (en) * | 2009-07-21 | 2011-01-27 | パナソニック電工株式会社 | Object detection device and baffle |
| JP5732616B2 (en) * | 2009-07-21 | 2015-06-10 | パナソニックＩｐマネジメント株式会社 | Intrusion sensor |
| JP2019026077A (en) * | 2017-07-31 | 2019-02-21 | ダイハツ工業株式会社 | Vehicle structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2572947Y2 (en) | 1998-05-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19980120 |
|
| LAPS | Cancellation because of no payment of annual fees |