JPH0749916Y2 - Ultrasonic transducer - Google Patents
Ultrasonic transducerInfo
- Publication number
- JPH0749916Y2 JPH0749916Y2 JP1986069127U JP6912786U JPH0749916Y2 JP H0749916 Y2 JPH0749916 Y2 JP H0749916Y2 JP 1986069127 U JP1986069127 U JP 1986069127U JP 6912786 U JP6912786 U JP 6912786U JP H0749916 Y2 JPH0749916 Y2 JP H0749916Y2
- Authority
- JP
- Japan
- Prior art keywords
- funnel
- ultrasonic transducer
- shaped resonator
- suppressing material
- pulse
- 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.)
- Expired - Lifetime
Links
Landscapes
- Transducers For Ultrasonic Waves (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Description
【考案の詳細な説明】 〈産業上の利用分野〉 この考案は、距離や物体の検知に使用する超音波送受波
器に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an ultrasonic wave transmitter / receiver used for detecting a distance or an object.
〈従来の技術と問題点〉 第３図はバイモルフ振動子を用いたパルス方式の超音波
送受波器の基本構造を示しており、圧電磁器振動子１と
金属製の振動板２あるいは二枚の圧電磁器振動子を貼合
わせて形成したバイモルフ振動子３の一面側中央部にア
ルミニウム等の漏斗状共振子４を接着固定して複合振動
体を構成し、上記バイモルフ振動子３のノード径付近を
ベース部５の筒状壁６で弾性接着剤７を介して支持し、
超音波を送受波するための開口部８や網スクリーン、パ
ターン等が設けられたケース９をベース部５に取付け、
複合振動体をケース９内に収納した構造になっている。<Prior Art and Problems> FIG. 3 shows the basic structure of a pulse-type ultrasonic transducer using a bimorph oscillator, which includes a piezoelectric ceramic oscillator 1 and a metal diaphragm 2 or two plates. A funnel-shaped resonator 4 made of aluminum or the like is adhesively fixed to the central portion on one surface side of the bimorph oscillator 3 formed by bonding piezoelectric ceramic oscillators to form a composite oscillator, and the vicinity of the node diameter of the bimorph oscillator 3 is formed. It is supported by the cylindrical wall 6 of the base portion 5 via the elastic adhesive 7,
A case 9 provided with an opening 8 for transmitting and receiving ultrasonic waves, a mesh screen, a pattern, etc. is attached to the base portion 5,
The structure is such that the composite vibrator is housed in the case 9.
このような超音波送受波器は漏斗状共振子４とバイモル
フ振動子３の機械的共振を利用して超音波を送、受信す
るものであり、漏斗状共振子の形状や寸法を所定周波数
に共振するよう設定することにより、高感度、高音圧が
得られる。Such an ultrasonic wave transmitter / receiver transmits and receives ultrasonic waves by utilizing the mechanical resonance of the funnel-shaped resonator 4 and the bimorph oscillator 3, and the shape and dimensions of the funnel-shaped resonator are set to a predetermined frequency. By setting it to resonate, high sensitivity and high sound pressure can be obtained.
ところで、上記のような超音波送受波器は漏斗状共振子
４の振動により、パルスの立ち下がりに残響が生じ、パ
ルスがあるレベル以下になるまでに時間がかかることに
なる。By the way, in the ultrasonic transmitter / receiver as described above, reverberation occurs at the trailing edge of the pulse due to vibration of the funnel-shaped resonator 4, and it takes time for the pulse to fall below a certain level.
このようにパルス立ち下がり特性が悪いと信号の戻って
くる時間が短い場合、残響パルスが反射信号かわからな
くなり、検出の誤動作が生じるという問題がある。In this way, when the pulse falling characteristic is poor, when the signal return time is short, there is a problem that the reverberation pulse cannot be recognized as a reflected signal and a detection malfunction occurs.
この考案は上記のような問題を解決するためになされた
ものであり、パルス立ち下がり特性の時間を短くし、検
出の誤動作を防ぐことができる超音波送受波器を提供す
ることを目的とする。The present invention has been made in order to solve the above problems, and an object thereof is to provide an ultrasonic transmitter / receiver capable of shortening the time of the pulse falling characteristic and preventing malfunction of detection. .
〈問題点を解決するための手段〉 上記のような問題点を解決するため、この考案は、漏斗
状共振子の内側底部に共振抑制材を取付けた構造とした
ものである。<Means for Solving Problems> In order to solve the above problems, the present invention has a structure in which a resonance suppressing material is attached to the inner bottom of the funnel-shaped resonator.
〈作用〉 バイモルフ振動子に取付けた漏斗状共振子は内側底部に
共振抑制材が取付けられているので、パルス立ち下がり
時における漏斗状共振子の共振を抑制し、パルス立ち下
がり時間を短くすることにより、検出の誤動作を防止す
る。<Function> Since the funnel-shaped resonator attached to the bimorph oscillator has a resonance suppressing material attached to the inner bottom, it is necessary to suppress the resonance of the funnel-shaped resonator at the time of pulse fall and shorten the pulse fall time. This prevents malfunction of detection.
〈実施例〉 以下、この考案の実施例を添付図面の第１図と第２図に
もとづいて説明する。<Embodiment> An embodiment of the present invention will be described below with reference to FIGS. 1 and 2 of the accompanying drawings.
なお第１図において第３図の基本構造と同一部分は同一
符合を付すことによって説明に代える。In FIG. 1, the same parts as those in the basic structure shown in FIG. 3 are designated by the same reference numerals and will not be described.
この考案の超音波送受波器は、バイモルフ振動子３に取
付けた漏斗状共振子４の内側底部に共振抑制材11を取付
けた点を要旨とし、漏斗状共振子４の共振を押えること
によりパルスの立ち下がり時間を短くしている。The ultrasonic transducer of the present invention is characterized in that a resonance suppressing material 11 is attached to the inner bottom portion of the funnel-shaped resonator 4 attached to the bimorph oscillator 3, and a pulse is generated by suppressing the resonance of the funnel-shaped resonator 4. The fall time of is shortened.
上記漏斗状共振子４の内側底部に取付ける共振抑制材11
としては、シリコン等のゴム系の樹脂や弾性接着剤を例
示することができ、これらの材料を溶融状態で滴下させ
る等の手段によって塗布する。Resonance suppressing material 11 attached to the inner bottom of the funnel-shaped resonator 4
Examples of the material include rubber-based resins such as silicon and elastic adhesives, and these materials are applied by means such as dropping in a molten state.
また、共振抑制材11の共振子４に対する塗布量は共振子
４の高さの1/5〜1/3程度の範囲が好ましい。Further, the amount of the resonance suppressing material 11 applied to the resonator 4 is preferably in the range of about 1/5 to 1/3 of the height of the resonator 4.
この考案の超音波送受波器は上記のような構成であり、
例えば第２図の如く、ｆ＝40KHz、20Vpp パルス幅0.5m
msec 周期 10mmsecの矩形波パルスをバイモルフ振動
子３に印加すると、従来の送受波器では同図に破線で示
す如く、パルスが1/10になるには、1.5mmsecを要した。The ultrasonic transmitter / receiver of the present invention is configured as described above,
For example, as shown in Fig. 2, f = 40KHz, 20Vpp pulse width 0.5m
When a rectangular wave pulse with a msec period of 10 mmsec is applied to the bimorph oscillator 3, it takes 1.5 mmsec for the conventional transducer to reach 1/10 of the pulse as shown by the broken line in the figure.
これに対して、この考案の送受波器は第２図実線のよう
にパルスが1/10になるまでの時間は約0.5msecとなり、
従来の1/3に時間を短縮できる。On the other hand, in the transmitter / receiver of this invention, the time until the pulse becomes 1/10 is about 0.5 msec as shown by the solid line in FIG.
The time can be shortened to 1/3 of the conventional time.
〈考案の効果〉 以上のように、この考案によると、バイモルフ振動子に
固定した漏斗状共振子の内側底部に共振抑制財を取付け
たので、漏斗状共振子の実質的な共振を抑制材によって
抑え、パルス立ち下がり時間の短縮により、パルス方式
の距離検知や物体検知の精度を向上させることができ、
特に一素子で送受信を兼用する場合に有利である。<Effect of device> As described above, according to this device, since the resonance suppressing material is attached to the inner bottom of the funnel-shaped resonator fixed to the bimorph oscillator, the substantial resonance of the funnel-shaped resonator is suppressed by the material. By suppressing and shortening the pulse fall time, it is possible to improve the accuracy of pulse type distance detection and object detection,
This is particularly advantageous when one element is used for both transmission and reception.
第１図はこの考案に係る送受波器の縦断面図、第２図は
出力レベルと時間の関係を示すグラフ、第３図は従来の
送受波器を示す縦断面図である。 ３…バイモルフ振動子、４…漏斗状共振子 ６…筒状壁、８…開口部 ９…ケース、11…共振抑制材FIG. 1 is a vertical sectional view of a transducer according to the present invention, FIG. 2 is a graph showing a relationship between output level and time, and FIG. 3 is a longitudinal sectional view showing a conventional transducer. 3 ... Bimorph oscillator, 4 ... Funnel-shaped resonator 6 ... Cylindrical wall, 8 ... Opening part 9 ... Case, 11 ... Resonance suppressing material
Claims (3)
状共振子を結合して複合振動体を形成し、この複合振動
体のノード径付近をベース部で弾力的に支持した状態
で、超音波の送受波用開口部を備えたケース内に複合振
動体を収納した超音波送受波器において、漏斗状共振子
の内側底部に共振抑制材を取付けたことを特徴とする超
音波送受波器。1. A composite vibration body is formed by coupling a funnel-shaped resonator made of metal to the central portion of a bimorph vibrator, and the base portion elastically supports the vicinity of the node diameter of the composite vibration body. An ultrasonic transducer in which a composite vibrator is housed in a case having an opening for transmitting and receiving ultrasonic waves, characterized in that a resonance suppressing material is attached to the inner bottom of a funnel-shaped resonator. vessel.
案登録請求の範囲第１項に記載の超音波送受波器。2. The ultrasonic transducer according to claim 1, wherein a rubber-based resin is used as the resonance suppressing material.
案登録請求の範囲第１項に記載の超音波送受波器。3. The ultrasonic transducer according to claim 1, wherein an elastic adhesive is used as a resonance suppressing material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986069127U JPH0749916Y2 (en) | 1986-05-08 | 1986-05-08 | Ultrasonic transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986069127U JPH0749916Y2 (en) | 1986-05-08 | 1986-05-08 | Ultrasonic transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62181097U JPS62181097U (en) | 1987-11-17 |
| JPH0749916Y2 true JPH0749916Y2 (en) | 1995-11-13 |
Family
ID=30909565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986069127U Expired - Lifetime JPH0749916Y2 (en) | 1986-05-08 | 1986-05-08 | Ultrasonic transducer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0749916Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4598747B2 (en) * | 2006-12-18 | 2010-12-15 | 三菱電機株式会社 | Ranging sensor and equipment equipped with the same |
| JP2013077992A (en) * | 2011-09-30 | 2013-04-25 | Taiheiyo Cement Corp | Ultrasonic sounding body and parametric speaker |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5463815A (en) * | 1977-10-31 | 1979-05-23 | Matsushita Electric Works Ltd | Ultrasonic wave generator |
| JPS55127796A (en) * | 1979-03-26 | 1980-10-02 | Nippon Ceramic Kk | Production of ultrasonic band transducer |
| JPS5764998U (en) * | 1980-10-06 | 1982-04-17 | ||
| JPS5851697A (en) * | 1981-09-22 | 1983-03-26 | Matsushita Electric Ind Co Ltd | Ultrasonic wave transceiver |
| JPS5866788U (en) * | 1981-10-28 | 1983-05-06 | シャープ株式会社 | Ultrasonic transducer |
-
1986
- 1986-05-08 JP JP1986069127U patent/JPH0749916Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62181097U (en) | 1987-11-17 |
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