JP2791960B2 - Ultrasonic transducer - Google Patents
Ultrasonic transducerInfo
- Publication number
- JP2791960B2 JP2791960B2 JP2330466A JP33046690A JP2791960B2 JP 2791960 B2 JP2791960 B2 JP 2791960B2 JP 2330466 A JP2330466 A JP 2330466A JP 33046690 A JP33046690 A JP 33046690A JP 2791960 B2 JP2791960 B2 JP 2791960B2
- Authority
- JP
- Japan
- Prior art keywords
- vibrator
- groove
- ultrasonic transducer
- electrode
- adhesive
- 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 - Fee Related
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、流体の超音波流速、流量計等に使用される
超音波送受波器に関するものである。The present invention relates to an ultrasonic transducer used for an ultrasonic flow velocity of a fluid, a flow meter, and the like.
従来のこの種の超音波送受波器としては、例えば第５
図に示すように、セラミックス系の振動子２の一端面に
は正電極３が形成され、他端面には負電極４が形成さ
れ、該負電極４には例えばテフロン製のフランジ付放射
板６が接着剤５によって接着固定されている。また、金
属製ハウジング１には絶縁部材11が配備され、該絶縁部
材11にはプラグ12が嵌め込み固定されている。そして、
前記振動子２の正電極３を前記プラグ12に金属導電板
９、圧縮コイルバネ10を介して接続し、負電極４を前記
ハウジング１にコイルバネ８を介して接続し、放射板６
を前記ハウジング１にＯリング13を介して押えリング14
で固定し、振動子２を密封状態で前記ハウジング１内に
収納していた。As a conventional ultrasonic transducer of this type, for example,
As shown in the figure, a positive electrode 3 is formed on one end surface of a ceramic vibrator 2, and a negative electrode 4 is formed on the other end surface thereof. Are bonded and fixed by the adhesive 5. An insulating member 11 is provided in the metal housing 1, and a plug 12 is fitted and fixed to the insulating member 11. And
The positive electrode 3 of the vibrator 2 is connected to the plug 12 via a metal conductive plate 9 and a compression coil spring 10, the negative electrode 4 is connected to the housing 1 via a coil spring 8,
To the housing 1 via an O-ring 13
And the vibrator 2 was housed in the housing 1 in a sealed state.
〔発明が解決しようとする課題〕 しかしながら、この従来の超音波送受波器では、放射
板６を接着した接着剤５の負電極４側が、周囲の温度変
化が大きくなった場合、前記放射板６、接着剤５及び電
極４の熱膨張係数の差異による熱ストレスによって剥離
し、超音波の放射効率が低下してしまうことがあった。[Problem to be Solved by the Invention] However, in this conventional ultrasonic transducer, when the temperature of the surroundings of the negative electrode 4 of the adhesive 5 to which the radiation plate 6 is adhered becomes large, the radiation plate 6 In some cases, the adhesive 5 and the electrode 4 are separated due to thermal stress due to a difference in thermal expansion coefficient between the adhesive 5 and the electrode 4, and the radiation efficiency of ultrasonic waves may be reduced.
本発明は、この従来の問題点を解消する超音波送受波
器を提供しようとするものである。An object of the present invention is to provide an ultrasonic transducer that solves this conventional problem.
本発明は、振動子の両端面に電極を形成し、該一端側
電極の外表面に放射板を接着固定した超音波送受波器に
おいて、前記一端側電極の振動子との接着面側に溝部を
形成し、該溝部分を電極との非接着部とするとともに、
該溝部に非接着部材を充填したことを特徴とする超音波
送受波器である。The present invention provides an ultrasonic transducer in which electrodes are formed on both end faces of a transducer, and a radiation plate is adhered and fixed to an outer surface of the one end electrode. And forming the groove portion as a non-adhesion portion with the electrode,
An ultrasonic transducer, wherein the groove is filled with a non-adhesive member.
一端側電極の接着面側に溝部を形成したから、接着部
周囲の温度変化があったときの半径方向の伸びは溝部で
吸収され、その結果、電極との接着面の熱ひずみは減少
し、接着剤の剥離が防止される。Since the groove is formed on the bonding surface side of the one end electrode, the radial expansion when there is a temperature change around the bonding portion is absorbed by the groove, and as a result, the thermal strain of the bonding surface with the electrode decreases, The peeling of the adhesive is prevented.
また、前記溝部に非接着性部材を充填したから、振動
子の振動は前記非接着性部材を介して確実に放射板へ伝
わるものである。Further, since the groove portion is filled with the non-adhesive member, the vibration of the vibrator is transmitted to the radiation plate without fail through the non-adhesive member.
本発明の実施例を第１図及び第２図に基づいて説明す
ると、超音波送受波器の基本構造は、第５図に示す従来
例と同様であるが、振動子２の一端面に複数の溝を格子
状に形成し、該端面及び周側面に負電極４を蒸着して放
射板接着面側に格子状溝部41に形成した負電極４とし、
該溝部41内に非接着性部材７（例えばテフロン）を充填
したものである。An embodiment of the present invention will be described with reference to FIGS. 1 and 2. The basic structure of an ultrasonic transducer is the same as that of the conventional example shown in FIG. the groove is formed in a lattice shape, by depositing a negative electrode 4 to the end face and the circumferential side surface and a negative electrode 4 formed in a lattice grooves 4 1 to the radiation plate bonding surface,
Non-adhesive member 7 in the groove portion 4 in 1 (for example Teflon) is obtained by filling.
また第３図は振動子２の負電極４の溝部変形例を示
し、振動子２の一端面に複数の溝を同心円状に形成し、
該端面及び周側面に負電極４を蒸着して接着面側に同心
円状溝部41を形成したものである。FIG. 3 shows a modified example of the groove portion of the negative electrode 4 of the vibrator 2, in which a plurality of grooves are formed concentrically on one end surface of the vibrator 2,
To the end surface and the peripheral side surface by depositing a negative electrode 4 is obtained by forming a concentric grooves 4 1 to the adhesive surface.
さらに第４図も振動子２の負電極４の溝部変形例を示
し、振動子２の一端面に複数の溝を平行状に形成し、該
端面及び周側面に負電極４を蒸着して接着面側に平行状
溝部41を形成したものである。FIG. 4 also shows a modified example of the groove portion of the negative electrode 4 of the vibrator 2, in which a plurality of grooves are formed in parallel on one end face of the vibrator 2, and the negative electrode 4 is vapor-deposited on the end face and the peripheral side face and adhered. it is obtained by forming a parallel groove portion 4 1 on the side.
このような構成により、接着部周囲の温度変化による
半径方向の伸びは溝部41で吸収され、その結果、放射板
と電極との接着面の熱ひずみ減少することになる。従っ
て、周囲の温度変化が大きくなっても熱ストレスによる
接着剤５の剥離は防止されることになる。With such a configuration, radial stretch due to temperature change in the ambient bonded portion is absorbed by the groove portion 4 1, with the result that the thermal strain reduction of the surface to be adhered to the radiation plate and the electrode. Therefore, even if the ambient temperature change is large, peeling of the adhesive 5 due to thermal stress is prevented.
また、前記溝部41に非接着性部材７を充填したから、
振動子２の振動は、前記非接着性部材７を介して確実に
放射板６に伝わることになる。Further, since filled with non-adhesive member 7 in the groove 4 1,
The vibration of the vibrator 2 is transmitted to the radiation plate 6 via the non-adhesive member 7 without fail.
なお、前記実施例においては振動子の一端側電極に溝
部を形成したものを示したが、該溝部は放射板に設けて
もよい。In the above embodiment, a groove is formed on the one end electrode of the vibrator. However, the groove may be provided on the radiation plate.
本発明は、振動子の一端側電極の振動子との接着面側
に溝部を形成し、該溝部部分を電極との非接着部とした
から、温度変化による半径方向の伸びは該溝部で吸収さ
れ、接着面の熱ひずみが減少するため、熱ストレスによ
る接着剤の剥離が防止される。According to the present invention, since a groove is formed on the one end side electrode of the vibrator on the bonding surface side with the vibrator, and the groove part is a non-adhesive part with the electrode, radial expansion due to temperature change is absorbed by the groove. As a result, the heat distortion of the bonding surface is reduced, so that peeling of the adhesive due to heat stress is prevented.
また、前記溝部に非接着性部材を充填したから、振動
子の振動は前記非接着性部材を介して放射板に確実に伝
わるので、前記溝部によって形成される空隙で超音波が
減衰するようなこともなくなり、溝部を設けたことによ
る超音波の放射効率の低下を防止することができる。Further, since the groove is filled with the non-adhesive member, the vibration of the vibrator is transmitted to the radiation plate via the non-adhesive member without fail, so that the ultrasonic wave is attenuated in the gap formed by the groove. This also prevents a decrease in the radiation efficiency of the ultrasonic wave due to the provision of the groove.
第１図は本発明の実施例を示す断面図、第２図（ａ）は
振動子及び電極の断面図、第２図（ｂ）は同左側面図、
第３図、第４は振動子の負電極の溝部変形例図、第５図
は従来例を示す断面図である。 １……ハウジング、２……振動子、３……正電極、４…
…負電極、５……接着剤、６……放射板、７……非接着
性部材、８……コイルバネ、９……金属導電板、10……
圧縮コイルバネ、11……絶縁部材、12……プラグ、13…
…Ｏリング、14……押えリング。1 is a sectional view showing an embodiment of the present invention, FIG. 2 (a) is a sectional view of a vibrator and electrodes, FIG. 2 (b) is a left side view of the same,
FIGS. 3 and 4 are modified examples of the groove portion of the negative electrode of the vibrator, and FIG. 5 is a sectional view showing a conventional example. 1 ... housing, 2 ... vibrator, 3 ... positive electrode, 4 ...
... negative electrode, 5 ... adhesive, 6 ... radiation plate, 7 ... non-adhesive member, 8 ... coil spring, 9 ... metal conductive plate, 10 ...
Compression coil spring, 11 ... insulating member, 12 ... plug, 13 ...
... O-ring, 14 ... Presser ring.
Claims (2)
電極の外表面に放射板を接着固定した超音波送受波器に
おいて、 前記一端側電極の振動子との接着面側に溝部を形成し、
該溝部分を電極との非接着部とするとともに、該溝部に
非接着部材を充填したことを特徴とする超音波送受波
器。1. An ultrasonic transducer in which electrodes are formed on both end faces of a vibrator and a radiation plate is adhered and fixed to an outer surface of said one end electrode, wherein said one end electrode has an adhering surface with the vibrator. Forming a groove,
An ultrasonic transducer, wherein the groove portion is a non-adhesive portion to an electrode, and the groove portion is filled with a non-adhesive member.
構成されたことを特徴とする請求項１記載の超音波送受
波器。2. The ultrasonic transducer according to claim 1, wherein said grooves are formed in a lattice, concentric, or parallel shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2330466A JP2791960B2 (en) | 1990-11-30 | 1990-11-30 | Ultrasonic transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2330466A JP2791960B2 (en) | 1990-11-30 | 1990-11-30 | Ultrasonic transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04204017A JPH04204017A (en) | 1992-07-24 |
| JP2791960B2 true JP2791960B2 (en) | 1998-08-27 |
Family
ID=18232943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2330466A Expired - Fee Related JP2791960B2 (en) | 1990-11-30 | 1990-11-30 | Ultrasonic transducer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2791960B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4870289B2 (en) * | 2001-09-19 | 2012-02-08 | トキコテクノ株式会社 | Ultrasonic vortex flowmeter |
| KR100774516B1 (en) * | 2006-10-31 | 2007-11-08 | 학교법인 포항공과대학교 | Ultrasonic waves speaker system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59190622A (en) * | 1983-04-13 | 1984-10-29 | Oval Eng Co Ltd | Ultrasonic wave transmitter in ultrasonic wave flowmeter |
| JPS63128602A (en) * | 1986-11-18 | 1988-06-01 | ティーディーケイ株式会社 | Plastic positive characteristic thermistor |
-
1990
- 1990-11-30 JP JP2330466A patent/JP2791960B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59190622A (en) * | 1983-04-13 | 1984-10-29 | Oval Eng Co Ltd | Ultrasonic wave transmitter in ultrasonic wave flowmeter |
| JPS63128602A (en) * | 1986-11-18 | 1988-06-01 | ティーディーケイ株式会社 | Plastic positive characteristic thermistor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04204017A (en) | 1992-07-24 |
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Legal Events
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| R360 | Written notification for declining of transfer of rights |
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| R371 | Transfer withdrawn |
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| LAPS | Cancellation because of no payment of annual fees |