JP2008145391A - Ultrasonic sensor - Google Patents
Ultrasonic sensor Download PDFInfo
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- JP2008145391A JP2008145391A JP2006335965A JP2006335965A JP2008145391A JP 2008145391 A JP2008145391 A JP 2008145391A JP 2006335965 A JP2006335965 A JP 2006335965A JP 2006335965 A JP2006335965 A JP 2006335965A JP 2008145391 A JP2008145391 A JP 2008145391A
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- bumper
- piezoelectric element
- cylindrical case
- ultrasonic
- ultrasonic waves
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本発明は、超音波周波数帯の送信、受信を行う超音波送受波器に関するものである。 The present invention relates to an ultrasonic transducer that transmits and receives an ultrasonic frequency band.
従来の実施の形態に関わる超音波送受波器において、これを車のバンパー等に設置する場合、バンパー等に取り付け用の貫通穴を空けた後、超音波送受波器本体を樹脂製のケースおよびベゼルなどを用いてバンパーの表側と裏側から固定する。超音波送受波器の超音波放射面はバンパー外側から見えるように設置されている。超音波送受信特性の高出力化や指向性の尖鋭化を実施する場合、超音波送受波器の振動面を大きくすることで可能となる。しかしながら従来の実施の形態に関わる超音波送受波器においてはバンパ外側から見えるように設置されるため、外観を損なわずに超音波送受信特性の高出力化や指向性の尖鋭化を行うのが難しいという問題がある。
従来の技術では外観を損なわずに超音波送受信特性の高出力化、指向性の尖鋭化を行うことが困難である。 With the conventional technology, it is difficult to increase the output of ultrasonic transmission / reception characteristics and sharpen directivity without impairing the appearance.
バンパーの裏側に圧電素子と有底筒状ケースから成る振動子を接合する。さらにバンパー部に凹部を設け、そこに圧電素子と有底筒状ケースから成る振動子を接合し、バンパーを振動させて超音波を送受信させる。またはバンパーの裏側に圧電素子を直接接合させ、バンパーを振動させて超音波を送受信させる。 A piezoelectric element and a vibrator comprising a bottomed cylindrical case are joined to the back side of the bumper. Further, a concave portion is provided in the bumper portion, and a vibrator comprising a piezoelectric element and a bottomed cylindrical case is joined thereto, and the bumper is vibrated to transmit / receive ultrasonic waves. Alternatively, a piezoelectric element is directly bonded to the back side of the bumper, and the bumper is vibrated to transmit / receive ultrasonic waves.
本発明により、外観を損なわずに振動子の大きさを大きくすることが出来るため高出力化や指向性の尖鋭化を容易に実現出来る。 According to the present invention, the size of the vibrator can be increased without impairing the appearance, so that high output and sharpening of directivity can be easily realized.
車載用コーナーセンサ等に用いる際、バンパーの裏側に圧電素子と有底筒状ケースから成るユニモルフ振動子または圧電素子を直接接合し、バンパーを振動させて超音波を送受信する。 When used in an in-vehicle corner sensor or the like, a unimorph vibrator or piezoelectric element comprising a piezoelectric element and a bottomed cylindrical case is directly joined to the back side of the bumper, and the bumper is vibrated to transmit and receive ultrasonic waves.
図1は本発明の請求項1の実施の形態に関わる超音波送受波器の概略縦断面図を表す。図1において、アルミニウム材等から成る有底筒状ケース2の底面内部に圧電素子1を貼り合わせ、ユニモルフ振動子を構成する。これをバンパー3に裏側からエポキシ接着剤などを用いて接合、固定する。圧電素子1の有底筒状ケース2との接着面側の反対面から入出力リード5a、又、有底筒状ケース2から入出力リード5bを半田付け等によって取り出す。圧電素子1の有底筒状ケース2との接着面側と有底筒状ケース2とは電気的に接続されており、更に、圧電素子1と入出力リード5a及び、有底筒状ケース2と入出力リード5bとは電気的に接続されている。圧電素子1の上面に発泡シリコーン等から成る吸音材4を載置し、入出力リード5aおよび5bは外部リード6aおよび6bにそれぞれ半田付けする。有底筒状ケースの背面開口部から自己接着性を有するシリコーンまたはウレタンなどから成る封止剤8を有底筒状ケース2内部に充填する。
図2は本発明の請求項2の実施の形態に関わる超音波送受波器の概略縦断面図である。
図2においてはバンパー3の厚みを部分的に薄くして凹部を設け図1に示すものと同様のユニモルフ振動子を有底筒状ケース2とバンパー3をエポキシ接着剤などを用いて接合、固定する。バンパー凹部の厚みtは0.1mm以上あればよく、望ましくは0.2mmから0.5mmの範囲とするのがよい。
図3は本発明の請求項3の実施の形態に関わる超音波送受波器の概略縦断面図である。
図3において、バンパ3に折り返し電極を有する圧電素子1を直接貼り合わせ、ユニモルフ振動子を構成する。圧電素子の外周部を覆うように筒状ケース7をバンパー3にエポキシ接着剤などを用いて接合、固定する。圧電素子の電極9aおよび9bから入出力リード5aおよび5bをそれぞれ半田付け等によって取り出す。圧電素子1の上面に発泡シリコーン等から成る吸音材4を載置し、筒状ケース2の背面開口部から自己接着性を有するシリコーンまたはウレタンなどから成る封止剤7を筒状ケース2内部に充填する。
FIG. 1 is a schematic longitudinal sectional view of an ultrasonic transducer according to an embodiment of claim 1 of the present invention. In FIG. 1, a piezoelectric element 1 is bonded to the inside of the bottom surface of a bottomed cylindrical case 2 made of an aluminum material or the like to constitute a unimorph vibrator. This is joined and fixed to the bumper 3 from the back side using an epoxy adhesive or the like. The input / output lead 5a is taken out from the opposite surface of the piezoelectric element 1 to the bottomed cylindrical case 2 and the input / output lead 5b is taken out from the bottomed cylindrical case 2 by soldering or the like. The adhesive surface side of the piezoelectric element 1 with the bottomed cylindrical case 2 and the bottomed cylindrical case 2 are electrically connected. Further, the piezoelectric element 1, the input / output lead 5a, and the bottomed cylindrical case 2 are electrically connected. And the input / output lead 5b are electrically connected. A
FIG. 2 is a schematic longitudinal sectional view of an ultrasonic transducer according to an embodiment of claim 2 of the present invention.
In FIG. 2, the bumper 3 is partially thinned to provide a recess, and a unimorph vibrator similar to that shown in FIG. 1 is joined and fixed to the bottomed cylindrical case 2 and the bumper 3 using an epoxy adhesive or the like. To do. The thickness t of the bumper recess may be 0.1 mm or more, and preferably in the range of 0.2 mm to 0.5 mm.
FIG. 3 is a schematic longitudinal sectional view of an ultrasonic transducer according to an embodiment of claim 3 of the present invention.
In FIG. 3, a piezoelectric element 1 having a folded electrode is directly bonded to a bumper 3 to constitute a unimorph vibrator. The cylindrical case 7 is joined and fixed to the bumper 3 using an epoxy adhesive or the like so as to cover the outer peripheral portion of the piezoelectric element. The input / output leads 5a and 5b are respectively taken out from the electrodes 9a and 9b of the piezoelectric element by soldering or the like. A
1 圧電素子
2 有底筒状ケース
3 バンパー
4 吸音材
5a 入出力リード
5b 入出力リード
6a 入出力端子
6b 入出力端子
7 筒状ケース
8 封止剤
DESCRIPTION OF SYMBOLS 1 Piezoelectric element 2 Bottomed cylindrical case 3
6a Input /
Claims (3)
Priority Applications (1)
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JP2006335965A JP2008145391A (en) | 2006-12-13 | 2006-12-13 | Ultrasonic sensor |
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JP2006335965A JP2008145391A (en) | 2006-12-13 | 2006-12-13 | Ultrasonic sensor |
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JP2006335965A Pending JP2008145391A (en) | 2006-12-13 | 2006-12-13 | Ultrasonic sensor |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010286296A (en) * | 2009-06-10 | 2010-12-24 | Nissan Motor Co Ltd | Mounting structure for ultrasonic transducer |
JP2013141175A (en) * | 2012-01-06 | 2013-07-18 | Nippon Ceramic Co Ltd | Ultrasonic transceiver |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62240890A (en) * | 1986-04-14 | 1987-10-21 | Matsushita Electric Works Ltd | Obstruction detector for vehicle |
JPH05248935A (en) * | 1991-09-26 | 1993-09-28 | Matsushita Electric Works Ltd | Ultrasonic sensor |
JPH10123236A (en) * | 1996-10-22 | 1998-05-15 | Matsushita Electric Works Ltd | Obstacle detector for vehicle |
JP2006013871A (en) * | 2004-06-25 | 2006-01-12 | Nippon Ceramic Co Ltd | Ultrasonic wave transducer |
JP2007038757A (en) * | 2005-08-01 | 2007-02-15 | Nippon Soken Inc | Obstacle detector |
JP2007147319A (en) * | 2005-11-24 | 2007-06-14 | Nippon Soken Inc | Obstacle detection device |
-
2006
- 2006-12-13 JP JP2006335965A patent/JP2008145391A/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62240890A (en) * | 1986-04-14 | 1987-10-21 | Matsushita Electric Works Ltd | Obstruction detector for vehicle |
JPH05248935A (en) * | 1991-09-26 | 1993-09-28 | Matsushita Electric Works Ltd | Ultrasonic sensor |
JPH10123236A (en) * | 1996-10-22 | 1998-05-15 | Matsushita Electric Works Ltd | Obstacle detector for vehicle |
JP2006013871A (en) * | 2004-06-25 | 2006-01-12 | Nippon Ceramic Co Ltd | Ultrasonic wave transducer |
JP2007038757A (en) * | 2005-08-01 | 2007-02-15 | Nippon Soken Inc | Obstacle detector |
JP2007147319A (en) * | 2005-11-24 | 2007-06-14 | Nippon Soken Inc | Obstacle detection device |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010286296A (en) * | 2009-06-10 | 2010-12-24 | Nissan Motor Co Ltd | Mounting structure for ultrasonic transducer |
JP2013141175A (en) * | 2012-01-06 | 2013-07-18 | Nippon Ceramic Co Ltd | Ultrasonic transceiver |
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