JPS6031431B2 - Unidirectional directional transducer - Google Patents
Unidirectional directional transducerInfo
- Publication number
- JPS6031431B2 JPS6031431B2 JP4789181A JP4789181A JPS6031431B2 JP S6031431 B2 JPS6031431 B2 JP S6031431B2 JP 4789181 A JP4789181 A JP 4789181A JP 4789181 A JP4789181 A JP 4789181A JP S6031431 B2 JPS6031431 B2 JP S6031431B2
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric vibrator
- transducer
- rubber
- unidirectional
- metal housing
- 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
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
- 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
- B06B1/0662—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 with an electrode on the sensitive surface
- B06B1/0674—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 with an electrode on the sensitive surface and a low impedance backing, e.g. air
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Transducers For Ultrasonic Waves (AREA)
Description
【発明の詳細な説明】
本発明は、高水圧下でも使用可能でかつ広い周波数帯城
にわたって良好な感度特性を有する単一方向指向性送受
波器に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a unidirectional directional transducer that can be used even under high water pressure and has good sensitivity characteristics over a wide frequency band.
従来の単一方向指向性送受波器の１例を第１図に従って
説明する。An example of a conventional unidirectional directional transducer will be explained with reference to FIG.
１は圧電振動子、２はこの圧電振動子１の前面をあげて
囲ったキルクゴム等の軟反射板、３はこの軟反射板２を
囲った金属ハウジング、４は入出力ケーブルであり、こ
れらをウレタン系ゴムのモールド材５でモールドした構
造となっていて、キルクゴムを欧反射板として圧電振動
子１の背面を遮音して単一方向指向性をもたせている。1 is a piezoelectric vibrator, 2 is a soft reflective plate such as Kirk rubber that surrounds the front side of the piezoelectric vibrator 1, 3 is a metal housing that surrounds this soft reflective plate 2, and 4 is an input/output cable. It has a structure in which it is molded with a molding material 5 of urethane rubber, and uses Kirk rubber as a reflective plate to insulate the back surface of the piezoelectric vibrator 1 and provide unidirectional directivity.
以上のような構造の送受波器によると、軟反射板２を直
接圧電振動子１の背面に使用しているため高水圧下で鰍
反射板２が圧縮されると圧電振動子１が破壊されてしま
うことになり高水圧下では使用が不可能となる欠点を有
している。そこで、高水圧下で使用可能な単一方向指向
性送受波器の従来例として第２図に示すものがある。According to the transducer having the above structure, the soft reflector 2 is used directly on the back surface of the piezoelectric vibrator 1, so if the gill reflector 2 is compressed under high water pressure, the piezoelectric vibrator 1 will be destroyed. This has the disadvantage that it cannot be used under high water pressure. Therefore, there is a conventional example of a unidirectional directional transducer that can be used under high water pressure, as shown in FIG.
，は圧電振動子、６はこの圧電振動子１の前面をあげて
囲ったゴム等の弾性材、７はこの弾性材６を囲った金属
板、４は入出力ケーブルであり、これらをウレタン系ゴ
ムのモールド材８によってモールドして構成し、＾／４
の弾性材６と入／４の金属板７によって音響不整合をと
って背面の感度をなくすようにしてある。このような構
造の送受波器によると、鰍反射板を使用しないために耐
水圧構造としては大変にすぐれているが、その構造上単
一方向指向性といえるのはｆ／ら＝４／９〜１４／９
ｆ：周波数、ち：中心周波数
の帯域であり、ほぼ１オクターブの範囲でしかない欠点
を有している。, is a piezoelectric vibrator, 6 is an elastic material such as rubber surrounding the front surface of the piezoelectric vibrator 1, 7 is a metal plate surrounding this elastic material 6, and 4 is an input/output cable, which is made of urethane-based Constructed by molding with rubber molding material 8, ^/4
The acoustic mismatch is achieved by the elastic material 6 and the metal plate 7, which eliminates the sensitivity of the back surface. According to the transducer with this structure, it has a very good water pressure resistant structure because it does not use a gill reflector, but due to its structure, it can be said that it has unidirectional directivity only when f/ra = 4/9. ~14/9 f: frequency, h: center frequency band, which has the disadvantage of being only within a range of approximately one octave.
本発明は上記の欠点を解決することを目的とし、圧電振
動子を前面を残して金属ハウジングで囲み、その金属ハ
ウジングを鰍反射板で囲むことにより広い周波数帯城に
わたって遮音し、しかも高水圧下でも圧電振動子に大き
なストレスが加わらないようにしたことを特徴とする。The present invention aims to solve the above-mentioned drawbacks, and by surrounding the piezoelectric vibrator with a metal housing leaving the front side, and surrounding the metal housing with a rib reflector, it is possible to insulate sound over a wide frequency band, and also under high water pressure. However, the feature is that large stress is not applied to the piezoelectric vibrator.
以下本発明の一実施例を図面に従って説明する。９は薄
切りされた圧電振動子、１川まこの圧電振動子９の前面
を残して他を囲んだゴムスベーサ、１１はこのゴムスベ
ーサ１０を囲んだ金属ハウジング、１２はこの金属ハウ
ジング１１を囲んだキルクゴム等の敏反射板、１３は入
出力ケーブルであり、これらをウレタン系ゴム等のモー
ルド材１４によってモールドして構成する。An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 9 denotes a thinly sliced piezoelectric vibrator, Mako Ichikawa's rubber base which surrounds the piezoelectric vibrator 9 except for the front side, 11 a metal housing which surrounds this rubber base 10, and 12 a kirk rubber etc. which surrounds this metal housing 11. 13 is an input/output cable, which is molded with a molding material 14 such as urethane rubber.
以上の構成による本発明によると、送受波器後方からの
音波は広い周波数帯城にわたって軟反射板１２によって
遮音され、送受波器は開放されている前方にのみ感度を
もち単一方向指向性となる。According to the present invention having the above configuration, the sound waves from the rear of the transducer are blocked by the soft reflection plate 12 over a wide frequency band, and the transducer is sensitive only to the open front and has unidirectional directivity. Become.
一方、高水圧に対しては欧反射板１２は圧縮されるが軟
反射板１２は金属ハウジング１１の外側にあるために圧
電振動子９に直接触れていないことになり圧電振動子９
には大きなストレスは加わらない。On the other hand, the soft reflector 12 is compressed by high water pressure, but since the soft reflector 12 is located outside the metal housing 11, it does not directly touch the piezoelectric vibrator 9.
does not add much stress.
つまり金属ハウジング１１が圧電振動子９を保護する役
目をする。音響的には、この金属ハウジング１１は低周
波数帯域すなわち音波波長が長い場合では、金属の厚み
は波長より十分４・さく金属ハウジングがない場合と同
等とみなすことができ、高周波数帯域すなわち音波波長
が短い場合では、金属の厚みは波長より十分大きく岡山
の反射板とみなすことができ、さらにその中間の周波数
帯城では中間的な性質を示して送受波器の特性に悪影響
をおよぼすことはない。In other words, the metal housing 11 serves to protect the piezoelectric vibrator 9. Acoustically, this metal housing 11 has a metal thickness that is 4 mm thicker than the wavelength in the case of a low frequency band, that is, a long sound wave wavelength, and can be considered to be equivalent to a case where there is no metal housing. When is short, the thickness of the metal is sufficiently larger than the wavelength and can be regarded as an Okayama reflector, and furthermore, in the frequency band in between, it exhibits intermediate properties and does not adversely affect the characteristics of the transducer. .
なお、鰍反射板としてはキルクゴムばかりでなく、独立
気泡入スポンジゴム等の軟らかい材料であれば同機の効
果を示し、どのような材料でもよい。The gill reflector may be made of not only Kirk rubber but also any soft material such as closed-cell sponge rubber, which exhibits the same effect.
また、上記実施例では圧電振動子に溝切りをしたものを
用いて機械的なストレスに対して弱い構造の場合で示し
たが、溝切りを施していない通常の板状圧露振動子でも
無論有効である。In addition, in the above example, a piezoelectric vibrator with grooves is used to create a structure that is weak against mechanical stress, but of course a normal plate-shaped pressure-depression vibrator without grooves may also be used. It is valid.
以上説明した本発明の送受波器によると、欧反射板は金
属ハウジングを介して圧電振動子を囲んだことにより広
い帯域にわたって単一方向指向特性を示し、また水圧に
対しても１３０ｋ９／塊の水圧を繰返し行なった後に行
なった性能試験の結果送受波感度、指向性ともに劣化は
起きないものであり、深海における送受波器として各種
海洋開発機器に利用することができる。According to the transducer of the present invention as described above, the European reflector plate exhibits unidirectional directivity over a wide band by surrounding the piezoelectric vibrator through a metal housing, and also has a unidirectional directivity characteristic of 130k9/mass against water pressure. Performance tests conducted after repeated water pressure tests showed that there was no deterioration in either the transmitting/receiving sensitivity or directivity, and it can be used as a transducer in the deep sea for various ocean development equipment.
第１図は従来の単一方向指向性送受波器の断面図、第２
図は従来の耐水圧型単一方向指向性送受波器の断面図、
第３図は本発明の一実施例を示す断面図である。
９・・・…圧電振動子、１０・・・・・・ゴムスベーサ
、１１・・・・・・金属ハウジング、１２・・・・・・
欧反射板。
薫１回菱２回
第３図Figure 1 is a cross-sectional view of a conventional unidirectional directional transducer;
The figure is a cross-sectional view of a conventional water pressure resistant unidirectional directional transducer.
FIG. 3 is a sectional view showing one embodiment of the present invention. 9...Piezoelectric vibrator, 10...Rubber baser, 11...Metal housing, 12...
European reflector. Kaoru 1st Hishi 2nd Figure 3
Claims (1)
属ハウジングを介して軟反射板を配したことを特徴とす
る単一方向指向性送受波器。1. A unidirectional directional transducer characterized in that a soft reflective plate is arranged on at least the back surface of a piezoelectric vibrator via a rubber spacer and a metal housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4789181A JPS6031431B2 (en) | 1981-03-31 | 1981-03-31 | Unidirectional directional transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4789181A JPS6031431B2 (en) | 1981-03-31 | 1981-03-31 | Unidirectional directional transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57162900A JPS57162900A (en) | 1982-10-06 |
| JPS6031431B2 true JPS6031431B2 (en) | 1985-07-22 |
Family
ID=12788023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4789181A Expired JPS6031431B2 (en) | 1981-03-31 | 1981-03-31 | Unidirectional directional transducer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6031431B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61251399A (en) * | 1985-04-30 | 1986-11-08 | Oki Electric Ind Co Ltd | Manufacture of ultrasonic wave transmitter-receiver |
-
1981
- 1981-03-31 JP JP4789181A patent/JPS6031431B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57162900A (en) | 1982-10-06 |
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