JPH0348464B2 - - Google Patents
Info
- Publication number
- JPH0348464B2 JPH0348464B2 JP61050494A JP5049486A JPH0348464B2 JP H0348464 B2 JPH0348464 B2 JP H0348464B2 JP 61050494 A JP61050494 A JP 61050494A JP 5049486 A JP5049486 A JP 5049486A JP H0348464 B2 JPH0348464 B2 JP H0348464B2
- Authority
- JP
- Japan
- Prior art keywords
- tire
- ultrasonic
- ultrasonic transducer
- steel plate
- pair
- 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
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
この発明は、タイヤ型超音波接触子に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a tire-type ultrasonic contactor.
従来、連続的に移動する鋼板に存在する疵を検
出するには、例えば、タイヤ型超音波探触子が用
いられる。この探触子は、第３図に示すように、
１対の固定軸１と、１対の固定軸１の間に設けら
れた超音波振動子２と、超音波振動子２を囲むよ
うに１対の固定軸１に軸受３を介して回転自在に
取り付けられたタイヤ４とからなつている。そし
て、タイヤ４と超音波振動子２との間には、水や
油等の接触媒体５が充填されている。
Conventionally, for example, a tire-shaped ultrasonic probe is used to detect flaws present in a continuously moving steel plate. This probe, as shown in Figure 3,
A pair of fixed shafts 1, an ultrasonic transducer 2 provided between the pair of fixed shafts 1, and an ultrasonic transducer 2 that is rotatable via a bearing 3 on the pair of fixed shafts 1 so as to surround the ultrasonic transducer 2. It consists of a tire 4 attached to. A contact medium 5 such as water or oil is filled between the tire 4 and the ultrasonic vibrator 2.
このように構成されている、従来のタイヤ型超
音波探触子においては、連続的に移動する鋼板６
の上面に接触媒体８を介してタイヤ４が接触する
ように探触子を設置する。そして、超音波振動子
２から超音波を鋼板６に向けて発振させると、超
音波は接触媒体５を伝播し、その後鋼板６を板波
および表面波で伝播し、疵が存在すれば、反射エ
コーは往路と同経路で再び超音波振動子２に入射
する。このようにして、鋼板６に存在する疵が連
続的に検出される。しかし、これは、薄板や鋼板
表層部の探傷が主流であり、通常の超音波探傷で
用いられる２〜10MHzの縦波で十分な感度余裕を
もつて、鋼板内部の欠陥検出ができるものがなか
つた。その理由は、接触媒体５をタイヤ４および
鋼板６との間の往復音圧通過率が小さいことにあ
つた。しかも、タイヤ４の肉厚が薄いためにタイ
ヤ４の使用寿命が短かかつた。また、タイヤ４と
鋼板６との間に接触媒体８を介さないドライカツ
プリングの状態で、板厚測定ができるタイヤ型探
触子を存在しなかつた。 In the conventional tire-type ultrasonic probe configured in this way, the steel plate 6 moves continuously.
A probe is installed so that the tire 4 is in contact with the top surface of the tire 4 via the contact medium 8. When ultrasonic waves are emitted from the ultrasonic transducer 2 toward the steel plate 6, the ultrasonic waves propagate through the contact medium 5 and then through the steel plate 6 as plate waves and surface waves. The echo enters the ultrasonic transducer 2 again on the same path as the outward path. In this way, flaws existing on the steel plate 6 are continuously detected. However, this method is mainly used to detect flaws in thin plates and the surface layer of steel plates, and there is no method that can detect defects inside steel plates with sufficient sensitivity margin using longitudinal waves of 2 to 10 MHz, which are used in normal ultrasonic flaw detection. Ta. The reason for this was that the round-trip sound pressure passage rate between the contact medium 5 and the tire 4 and the steel plate 6 was small. Moreover, since the tire 4 had a thin wall thickness, the tire 4 had a short service life. Further, there is no tire-shaped probe that can measure the thickness of the tire 4 and the steel plate 6 in a dry coupling state without the intervening contact medium 8 between the tire 4 and the steel plate 6.
そこで、超音波の減衰が小さく、鋼板との往復
音圧通過率が大きく、しかも、タイヤの使用寿命
が長く、さらに、ドライカツプリングで板厚測定
が行えるタイヤ型超音波探触子の開発が望まれて
いるが、かかる探触子は未だ提案されていない。 Therefore, it was necessary to develop a tire-shaped ultrasonic probe that has low ultrasonic attenuation, high round-trip sound pressure passage rate with the steel plate, long tire service life, and can measure plate thickness by dry coupling. Although desired, such a probe has not yet been proposed.
従つて、この発明の目的は、超音波の減衰が小
さく、かつ、鋼板との往復音圧通過率が大きく、
しかも、タイヤの使用寿命が長く、さらに、ドラ
イカツプリングで板厚測定が行なえるタイヤ型超
音波探触子を提供することにある。
Therefore, an object of the present invention is to reduce the attenuation of ultrasonic waves, and to increase the reciprocating sound pressure passage rate with the steel plate.
Moreover, it is an object of the present invention to provide a tire-shaped ultrasonic probe that has a long tire service life and can also measure plate thickness by dry coupling.
この発明は、１対の固定軸と、前記１対の固定
軸の間に取り付けられた超音波振動子と、前記超
音波振動子を囲むように前記１対の固定軸に回転
自在に取り付けられたタイヤと、前記タイヤと前
記超音波振動子との間に充填された接触媒体とか
らなるタイヤ型超音波探触子において、前記タイ
ヤが厚肉のブタジエン系またはシリコン系のゴム
によつて作られ、そして、前記超音波振動子の前
面にブタジエン系またはシリコン系のゴムによつ
て作られた伝播部材が、前記タイヤと若干の間隙
をあけて取り付けられていることに特徴を有する
ものである。
The present invention includes a pair of fixed shafts, an ultrasonic transducer mounted between the pair of fixed shafts, and an ultrasonic transducer mounted rotatably on the pair of fixed shafts so as to surround the ultrasonic transducer. A tire-type ultrasonic probe comprising a tire and a contact medium filled between the tire and the ultrasonic transducer, wherein the tire is made of thick-walled butadiene-based or silicone-based rubber. and is characterized in that a propagation member made of butadiene-based or silicone-based rubber is attached to the front surface of the ultrasonic vibrator with a slight gap from the tire. .
次に、この発明のタイヤ型超音波探触子の一実
施態様を図面を参照しながら説明する。
Next, one embodiment of the tire-shaped ultrasonic probe of the present invention will be described with reference to the drawings.
第１図は、この発明のタイヤ型超音波探触子の
一実施態様の断面図、第２図は、第１図のＡ−Ａ
線断面図である。 FIG. 1 is a sectional view of an embodiment of the tire-type ultrasonic probe of the present invention, and FIG. 2 is a cross-sectional view taken along the line A-A in FIG.
FIG.
第１図および第２図において、超音波振動子２
は、１対の固定軸１間に取り付けられている。タ
イヤ４は、水や油と同等の減衰定数をもち、鋼板
との往復音圧通過率が大きいブタジエン系ゴムま
たはシリコン系ゴムによつて作られている。この
うち特に好ましいのは、ブタジエン系ゴムであ
る。タイヤ４は、超音波振動子２を囲むように軸
受３を介して１対の固定軸１に回転自在に取り付
けられている。 In FIGS. 1 and 2, the ultrasonic transducer 2
is attached between a pair of fixed shafts 1. The tire 4 is made of butadiene-based rubber or silicone-based rubber, which has a damping constant equivalent to that of water or oil and has a high reciprocating sound pressure passage rate with a steel plate. Among these, butadiene rubber is particularly preferred. The tires 4 are rotatably attached to a pair of fixed shafts 1 via bearings 3 so as to surround the ultrasonic transducer 2 .
超音波振動子２の前面には、タイヤ４と同様に
ブタジエン系ゴムまたはシリコン系ゴムによつて
作られた伝播部材７が取り付けられている。伝播
部材７とタイヤ４との間には、これらが接触しな
い程度の若干の隙間が形成されている。 A propagation member 7 made of butadiene-based rubber or silicone-based rubber, like the tire 4, is attached to the front surface of the ultrasonic transducer 2. A slight gap is formed between the propagation member 7 and the tire 4 so that they do not come into contact with each other.
タイヤ４と伝播部材７との間には、水や油等の
通常の接触媒体５が充填されている。 A common contact medium 5 such as water or oil is filled between the tire 4 and the propagation member 7.
このように構成されている、この発明のタイヤ
型超音波探触子においては、連続的に移動する鋼
板６の上面に接触媒体８を介してタイヤ４が接触
するように接触子を設置する。そして、超音波振
動子２から超音波を鋼板６に向けて発振させる
と、超音波は伝播部材７およびタイヤ４を伝播
し、その後、２〜10MHzの縦波が鋼板内部に伝播
し、反射源が存在すれば、反射エコーは、往路と
同経路で再び超音波振動子２に入射する。このよ
うに、超音波は、伝播過程で減衰しにくく、鋼板
との往復音圧通過率も大きいので、鋼板６の探傷
は勿論、ドライカツプリングで板厚の測定も行な
える。しかも、タイヤ４の肉厚が厚いので、使用
寿命が長い。 In the tire-shaped ultrasonic probe of the present invention configured as described above, a contactor is installed so that the tire 4 comes into contact with the upper surface of the continuously moving steel plate 6 via the contact medium 8. When an ultrasonic wave is emitted from the ultrasonic transducer 2 toward the steel plate 6, the ultrasonic wave propagates through the propagation member 7 and the tire 4, and then a longitudinal wave of 2 to 10 MHz propagates inside the steel plate, causing a reflection source. If there is, the reflected echo enters the ultrasonic transducer 2 again on the same path as the outgoing path. In this way, since ultrasonic waves are difficult to attenuate during the propagation process and have a high rate of sound pressure passing back and forth to the steel plate, it is possible not only to detect flaws in the steel plate 6 but also to measure the thickness of the plate by dry coupling. Moreover, since the tire 4 has a thick wall, it has a long service life.
以上説明したように、この発明によれば、超音
波の減衰が小さく、鋼板との往復音圧通過率が大
きいので、探傷は勿論、ドライカツプリングで板
厚の測定も行なえ、しかも、タイヤの使用寿命が
大幅に延びるといつたきわめて有用な効果がもた
らされる。
As explained above, according to the present invention, the attenuation of ultrasonic waves is small and the round-trip sound pressure passage rate with respect to the steel plate is large, so it is possible to perform not only flaw detection but also plate thickness measurement by dry coupling. Significantly extended service life has very beneficial effects.
第１図は、この発明のタイヤ型超音波探触子の
一実施態様を示す断面図、第２図は、第１図のＡ
−Ａ線断面図、第３図は、従来のタイヤ型超音波
探触子を示す断面図である。図面において、
１…固定軸、２…超音波振動子、３…軸受、４
…タイヤ、５…接触媒体、６…鋼板、７…伝播部
材、８…接触媒体。
FIG. 1 is a sectional view showing an embodiment of the tire-type ultrasonic probe of the present invention, and FIG.
- A sectional view, FIG. 3 is a sectional view showing a conventional tire-type ultrasonic probe. In the drawings, 1... fixed shaft, 2... ultrasonic vibrator, 3... bearing, 4
... Tire, 5... Contact medium, 6... Steel plate, 7... Propagation member, 8... Contact medium.
Claims (1)
り付けられた超音波振動子と、前記超音波振動子
を囲むように前記１対の固定軸に回転自在に取り
付けられたタイヤと、前記タイヤと前記超音波振
動子との間に充填された接触媒体とからなるタイ
ヤ型超音波探触子において、前記タイヤが厚肉の
ブタジエン系またはシリコン系ゴムによつて作ら
れ、そして、前記超音波振動子の前面にブタジエ
ン系またはシリコン系のゴムによつて作られた伝
播部材が、前記タイヤと若干の間隙をあけて取り
付けられていることを特徴とするタイヤ型超音波
探触子。1 a pair of fixed shafts, an ultrasonic transducer mounted between the pair of fixed shafts, and a tire rotatably mounted on the pair of fixed shafts so as to surround the ultrasonic transducer; , a tire-shaped ultrasonic probe comprising a contact medium filled between the tire and the ultrasonic transducer, wherein the tire is made of thick-walled butadiene-based or silicone-based rubber; A tire-type ultrasonic probe characterized in that a propagation member made of butadiene-based or silicon-based rubber is attached to the front of the ultrasonic transducer with a slight gap from the tire. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61050494A JPS62207954A (en) | 1986-03-10 | 1986-03-10 | Tire-shaped ultrasonic probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61050494A JPS62207954A (en) | 1986-03-10 | 1986-03-10 | Tire-shaped ultrasonic probe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62207954A JPS62207954A (en) | 1987-09-12 |
| JPH0348464B2 true JPH0348464B2 (en) | 1991-07-24 |
Family
ID=12860483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61050494A Granted JPS62207954A (en) | 1986-03-10 | 1986-03-10 | Tire-shaped ultrasonic probe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62207954A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02131660U (en) * | 1989-04-07 | 1990-11-01 | ||
| JP5895667B2 (en) * | 2012-03-30 | 2016-03-30 | Ｊｆｅスチール株式会社 | Self-propelled flaw detector |
-
1986
- 1986-03-10 JP JP61050494A patent/JPS62207954A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62207954A (en) | 1987-09-12 |
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