JPH0441343Y2 - - Google Patents
Info
- Publication number
- JPH0441343Y2 JPH0441343Y2 JP6506987U JP6506987U JPH0441343Y2 JP H0441343 Y2 JPH0441343 Y2 JP H0441343Y2 JP 6506987 U JP6506987 U JP 6506987U JP 6506987 U JP6506987 U JP 6506987U JP H0441343 Y2 JPH0441343 Y2 JP H0441343Y2
- Authority
- JP
- Japan
- Prior art keywords
- speed sensor
- case
- sensor element
- support plates
- hole
- 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
- 239000011347 resin Substances 0.000 claims 1
- 229920005989 resin Polymers 0.000 claims 1
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000000565 sealant Substances 0.000 description 3
- 241000251468 Actinopterygii Species 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 230000005355 Hall effect Effects 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000007799 cork Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 1
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Transducers For Ultrasonic Waves (AREA)
Description
【考案の詳細な説明】
「産業上の利用分野」
本案は水深測定や魚群探知に利用され、特に船
体の速度をも同時に測定できるよう、速度センサ
を具備せしめた水中超音波送受波器に関するもの
である。[Detailed description of the invention] "Industrial application field" This invention relates to an underwater ultrasonic transducer equipped with a speed sensor, which is used for water depth measurement and fish detection, and in particular can simultaneously measure the speed of a ship. It is.
「従来の技術」
速度センサ付き水中超音波送受波器として第４
図に示すものが公知である。即ち、同図において
１は硬質プラスチツク、真ちゅう等よりなる凹状
ケース、２はチタン酸バリウム、チタン酸ジルコ
ン酸鉛等よりなる圧電素子で、内外面に電極２
ａ，２ｂを被着し、外面電極２ｂを音波送受面と
する。３は前記圧電素子の音波送受面２ｂを除く
外面を囲むように配設したスポンジ、コルク等の
音響減衰効果の大きい物質よりなる反射層で、前
記圧電素子２とともにケース１内に収納される。
４は前記ケース１の内面と音響反射層３との間及
びケース開口面と圧電素子の音波送受面２ｂとの
間に充填したプラスチツク等の封止剤で、圧電素
子２、反射層３及び速度センサ素子（後記）を液
密に保持する。５は前記凹状ケース１の内面の一
面側に接着剤６によつて貼着した速度センサ素子
で、磁石よりなる羽根車（後記）の回転により起
電力を生ずるコイル、ホール効果素子、あるいは
電路を開閉するリードスイツチ等が内部に設けら
れている。７ａ，７ｂは前記ケース１の外面の一
側面にて横方向に突設された一対の支持板、８は
Ｎ−Ｓ極に連続的に磁化された複数の歯８ａと回
転軸８ｂを有する羽根車で、前記一対の支持板７
ａ，７ｂ間にて歯８ａの下端部分がケース１の開
口面側（音波送受面２ｂ側）より下方に突出する
よう配するとともに回転軸８ｂの両端を支持板７
ａ，７ｂに軸支される。９は前記ケース１の上端
面より外部の回路装置（図示しない）まで引出さ
れた電線で、圧電素子の電極２ａ，２ｂに接続す
る導線９ａ，９ｂと、速度センサ素子５に接続す
る導線９ｃを内部に具備する。"Conventional technology" 4th underwater ultrasonic transducer with speed sensor
What is shown in the figure is publicly known. That is, in the figure, 1 is a concave case made of hard plastic, brass, etc., and 2 is a piezoelectric element made of barium titanate, lead zirconate titanate, etc., with electrodes 2 on the inner and outer surfaces.
a and 2b, and the outer electrode 2b serves as a sound wave transmitting/receiving surface. Reference numeral 3 denotes a reflective layer made of a material with a large acoustic attenuation effect, such as sponge or cork, disposed so as to surround the outer surface of the piezoelectric element except for the sound wave transmitting/receiving surface 2b, and is housed in the case 1 together with the piezoelectric element 2.
Reference numeral 4 denotes a sealant such as plastic filled between the inner surface of the case 1 and the acoustic reflection layer 3 and between the opening surface of the case and the sound wave transmitting/receiving surface 2b of the piezoelectric element. Hold the sensor element (described later) liquid-tight. Reference numeral 5 denotes a speed sensor element that is attached to one side of the inner surface of the concave case 1 with an adhesive 6, and includes a coil, a Hall effect element, or an electric circuit that generates an electromotive force by the rotation of an impeller (described later) made of a magnet. A reed switch etc. to open and close is provided inside. Reference numerals 7a and 7b denote a pair of support plates that protrude laterally from one side of the outer surface of the case 1, and 8 denotes a blade having a plurality of teeth 8a continuously magnetized to N-S poles and a rotating shaft 8b. In the car, the pair of support plates 7
The lower end portion of the tooth 8a is arranged between a and 7b so as to protrude downward from the opening side of the case 1 (the sound wave transmitting/receiving surface 2b side), and both ends of the rotating shaft 8b are connected to the support plate 7.
It is pivotally supported by a and 7b. Reference numeral 9 denotes electric wires drawn out from the upper end surface of the case 1 to an external circuit device (not shown), including conductive wires 9a and 9b connected to the electrodes 2a and 2b of the piezoelectric element, and conductive wire 9c connected to the speed sensor element 5. Equipped inside.
かかる構成の超音波送受波器は、船体に取付け
られて使用され、圧電素子の音波送受面２ｂより
海中に向けて超音波を放射し、対象物（海底、魚
群等）に当たつて戻つてくる反射波を前記音波送
受面２ｂより受信し圧電素子２が歪みを受けて受
波信号を生じ、また船体の移動に伴ない羽根車８
の下端部分が水流を受けて歯８ａが回転して磁界
変化を生じ、この歯８ａと一定の間隔で対向する
ようにケース内面に貼着された速度センサ素子５
に前記船体の移動速度に応じた検出信号を生じ
る。これら受波信号及び速度検出信号は導線９
ａ，９ｂ，９ｃを有する電線９を通して外部回路
装置に供給される。 The ultrasonic transducer with such a configuration is used by being attached to the hull of a ship, and emits ultrasonic waves into the sea from the sound wave transmitting/receiving surface 2b of the piezoelectric element, and when they hit an object (the seabed, a school of fish, etc.) and return. The piezoelectric element 2 receives the reflected wave from the sound wave transmitting/receiving surface 2b, and the piezoelectric element 2 is distorted to generate a received signal.
A speed sensor element 5 is attached to the inner surface of the case so as to face the tooth 8a at a constant interval when the lower end part of the tooth 8a rotates and changes the magnetic field.
A detection signal corresponding to the moving speed of the ship is generated. These reception signals and speed detection signals are transmitted through the conductor 9
It is supplied to an external circuit device through an electric wire 9 having a, 9b and 9c.
「考案が解決しようとする問題点」
従来の超音波送受波器は上述した構成、機能よ
りなるが、次の問題点を含んでいた。``Problems to be Solved by the Invention'' Conventional ultrasonic transducers have the above-mentioned configuration and functions, but include the following problems.
即ち、従来は凹状ケース１の内面に速度センサ
素子５が接着剤６によつて単に貼着されているだ
けのため、ケース内に圧電素子２や音響反射層８
を封止するために充填したプラスチツク封止剤４
の硬化の際に働く熱収縮応力を受けてケース内面
より剥離して羽根車の歯８ａとの対向拒離が大き
くなり充分な磁力が作用せず速度センサとしての
機能を低下することである。 That is, conventionally, the speed sensor element 5 was simply attached to the inner surface of the concave case 1 with an adhesive 6, so the piezoelectric element 2 and the acoustic reflection layer 8 were not placed inside the case.
Plastic sealant 4 filled to seal the
Under the heat shrinkage stress exerted during hardening, the impeller peels off from the inner surface of the case, and the opposing resistance to the impeller teeth 8a becomes large, preventing sufficient magnetic force from acting on it and deteriorating its function as a speed sensor.
なお、上記欠点を解消するため速度センサ素子
５をケースの外面に貼着することも考えられる
が、導線８ｃを他の導線８ａ，８ｂと一緒に取出
すことができず、電線数が増え構成の簡略化の点
から有効な手段とは云い難い。 Although it is conceivable to attach the speed sensor element 5 to the outer surface of the case in order to eliminate the above-mentioned drawbacks, the conductor 8c cannot be taken out together with the other conductors 8a and 8b, which increases the number of electric wires and makes the configuration difficult. It is difficult to say that this is an effective means from the point of view of simplification.
「問題点を解決するための手段」
本案はケース内面の一側部にセンサ取付孔を設
け、これに速度センサ素子を機械的保持手段を介
して固定することによつて上記問題点を解決し
た。"Means for solving the problem" This proposal solves the above problem by providing a sensor mounting hole on one side of the inner surface of the case and fixing the speed sensor element to this hole through a mechanical holding means. .
「作用」
速度センサ素子を接着剤でなく機械的保持手段
によつて保持固定してから、封止剤の熱収縮応力
を受けてもケース内面から剥離するようなことは
なく、外部の羽根車の歯と常に所定の間隔を維持
することになる。"Operation" After the speed sensor element is held and fixed by mechanical holding means instead of adhesive, it will not peel off from the inner surface of the case even if it is subjected to heat shrinkage stress of the sealant, and the external impeller A predetermined distance will always be maintained between the teeth.
「実施例」
本案の一例を示す第１図において、ケース１の
内面の一側部に、凹み１ａとその開口面側に互い
に内側に伸びる一対の係止片１ｂ，１ｂよりなる
センサ取付孔１c1を形成するとともに取付部の深
さａを速度センサ素子５の厚みとほぼ同寸として
なる。従つて取付孔１ｃに速度センサ素子５を挿
入すると、該素子は係止片１ｂ，１ｂにより拘束
され、かつ緊密に固定されることになる。"Example" In FIG. 1 showing an example of the present proposal, a sensor mounting hole 1c is formed on one side of the inner surface of a case 1, and includes a recess 1a and a pair of locking pieces 1b, 1b extending inwardly from each other on the opening side of the recess 1a. 1 , and the depth a of the mounting portion is approximately the same as the thickness of the speed sensor element 5. Therefore, when the speed sensor element 5 is inserted into the mounting hole 1c, the element is restrained and tightly fixed by the locking pieces 1b, 1b.
本案の他例を示す第２図において、取付部の深
さa′をセンサ素子５の厚みより大きくした取付孔
１c2を設け、この取付孔１ｃに弾性板１０ととも
に速度センサ素子５を挿設した以外は、上記第１
図実施例と同一とした。この場合、弾性板１０の
圧着力によりセンサ素子５はより緊密に固定され
ることになる。 In FIG. 2 showing another example of the present invention, a mounting hole 1c2 is provided in which the depth a' of the mounting part is larger than the thickness of the sensor element 5, and the speed sensor element 5 is inserted together with the elastic plate 10 into this mounting hole 1c. Except for the above
It is the same as the example shown in the figure. In this case, the sensor element 5 is fixed more tightly due to the pressure force of the elastic plate 10.
更に本案の他例を示す第３図においては、ケー
ス１の内面にセンサ素子の厚みより大きい深さを
有する凹み１ａよりなる取付孔１c3を設け、これ
に速度センサ素子５と挿入し、凹み１ａの開口部
に該素子を凹みの内底面に押圧するビス１１を螺
設したものである。 Furthermore, in FIG. 3 showing another example of the present invention, a mounting hole 1c3 consisting of a recess 1a having a depth greater than the thickness of the sensor element is provided on the inner surface of the case 1, and the speed sensor element 5 is inserted into the mounting hole 1c3. A screw 11 is screwed into the opening of 1a to press the element against the inner bottom surface of the recess.
従つて上記第１図の係止片１ｂ，１ｂ、第２図
の弾性板１０、第３図のビス１１は、本案で云う
機械的保持手段として機能することになる。 Therefore, the locking pieces 1b, 1b shown in FIG. 1, the elastic plate 10 shown in FIG. 2, and the screw 11 shown in FIG. 3 function as the mechanical holding means referred to in the present invention.
「考案の効果」
本案によれば、速度センサ素子がケース内面の
一側部に確実に固定されることになるので、外部
の羽根車との対向拒離を常に一定とするため速度
センサの機能を全く逸失せず、信頼性の高いこの
種速度センサ付き超音波送受波器を市場に供し得
る。``Effect of the invention'' According to the present invention, the speed sensor element is securely fixed to one side of the inner surface of the case, so the speed sensor functions to maintain constant opposition to and from the external impeller. This type of highly reliable ultrasonic transducer with a speed sensor that does not lose any speed can be offered on the market.
第１図は本案の一例に係る要部の断面図、第２
図、第３図はそれぞれ本案の他例に係る要部の断
面図、第４図は従来の速度センサ付き水中超音波
送受波器を示し、Ａは縦断正面図、Ｂは要部断面
平面図である。
１……凹状ケース、２……圧電素子、３……音
響反射層、５……速度センサ素子、７ａ，７ｂ…
…一対の支持板、８……羽根車、１c1，１c2，１
c3……センサ取付孔、１ｂ，１ｂ，１０，１１…
…機械的保持手段。
Figure 1 is a sectional view of the main parts of an example of the present proposal, Figure 2
3 and 3 are sectional views of the main parts according to other examples of the present invention, respectively, and FIG. 4 shows a conventional underwater ultrasonic transducer with a speed sensor, where A is a longitudinal sectional front view and B is a sectional plan view of the main parts. It is. DESCRIPTION OF SYMBOLS 1... Concave case, 2... Piezoelectric element, 3... Acoustic reflection layer, 5... Speed sensor element, 7a, 7b...
...Pair of support plates, 8...Impeller, 1c 1 , 1c 2 , 1
c 3 ...Sensor mounting hole, 1b, 1b, 10, 11...
...mechanical retention means.
Claims (1)
を除く外面に配した音響反射層とを樹脂モールド
を介して封入するとともに前記ケース内面の一側
部に速度センサ素子を設け、かつ前記ケース外面
の一側部には一対の支持板を突設し、該支持板に
前記速度センサ素子を作動させる磁石よりなる羽
根車を回転自在に軸支してなるものにおいて、上
記ケース内面の一側部にセンサ取付孔を設け、こ
れに速度センサ素子を機械的保持手段を介して固
定したことを特徴とする速度センサ付き水中超音
波送受波器。 A piezoelectric element and an acoustic reflection layer disposed on the outer surface of the element excluding the sound wave transmitting/receiving surface are sealed in a concave case via a resin mold, and a speed sensor element is provided on one side of the inner surface of the case, and a speed sensor element is provided on one side of the inner surface of the case. A pair of support plates protrudes from one side, and an impeller made of a magnet for actuating the speed sensor element is rotatably supported on the support plates, wherein one side of the inner surface of the case. 1. An underwater ultrasonic transducer with a speed sensor, characterized in that a sensor mounting hole is provided in the hole, and a speed sensor element is fixed to the hole through a mechanical holding means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6506987U JPH0441343Y2 (en) | 1987-04-28 | 1987-04-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6506987U JPH0441343Y2 (en) | 1987-04-28 | 1987-04-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63172975U JPS63172975U (en) | 1988-11-10 |
| JPH0441343Y2 true JPH0441343Y2 (en) | 1992-09-29 |
Family
ID=30901803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6506987U Expired JPH0441343Y2 (en) | 1987-04-28 | 1987-04-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0441343Y2 (en) |
-
1987
- 1987-04-28 JP JP6506987U patent/JPH0441343Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63172975U (en) | 1988-11-10 |
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