JPS59222758A - Rotary probe type eddy current flaw detector - Google Patents
Rotary probe type eddy current flaw detectorInfo
- Publication number
- JPS59222758A JPS59222758A JP58097369A JP9736983A JPS59222758A JP S59222758 A JPS59222758 A JP S59222758A JP 58097369 A JP58097369 A JP 58097369A JP 9736983 A JP9736983 A JP 9736983A JP S59222758 A JPS59222758 A JP S59222758A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- signal
- rotor
- substrate
- electronic device
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9013—Arrangements for scanning
Abstract
Description
【発明の詳細な説明】
この発明は棒鋼などの丸棒状の金属材料に存在する傷を
検出するようにしだ探傷機に関するもので、更に詳しく
は、上記金属材料の周囲にプローブを回転させてそのグ
ローブによシ傷を検出するようにしている回転グローブ
式渦流探傷機に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flaw detector for detecting flaws in a round bar-shaped metal material such as a steel bar. This invention relates to a rotating glove type eddy current flaw detector that detects scratches on a glove.
この種の回転プローブ式渦流深傷機にあって、回転して
いるグローブと静止している電子装置との間で信号の伝
送をする為の手段としては、フェライトにコイルを巻い
たもの二つを相互に対向させてそれら相互間での電磁結
合によって信号伝送を行なうようにした手段が知られて
いる。しかしこのようなものは信号伝送時のノイズが多
かったり、或いは伝送できる信号の周波数帯域が狭かっ
たシする欠点がある０
そこで本発明は上述の欠点を除くようにしたもので、ノ
イズ少なく信号を伝送することができ、又伝送できる信
号の帯域も広い信号伝送手段を備えた回転プローブ式渦
流探傷機を提供しようとするものである。In this type of rotating probe type eddy current deep wound machine, there are two methods for transmitting signals between the rotating globe and the stationary electronic device: a coil wound around a ferrite. There is a known method in which signals are transmitted by electromagnetic coupling between the two facing each other. However, such a device has the disadvantage that there is a lot of noise during signal transmission, or the frequency band of the signal that can be transmitted is narrow. Therefore, the present invention is designed to eliminate the above-mentioned disadvantages, and to transmit the signal with less noise. The object of the present invention is to provide a rotating probe type eddy current flaw detector that is equipped with a signal transmission means that can transmit signals over a wide band.
以下本願の実施例を示す図面について説明する。The drawings showing the embodiments of the present application will be described below.
固定的に備えられている機枠１の内側には、機枠１に対
してベアリングを介して取付けられた回動自在のロータ
２が備わっている。又そのロータ２は被検査材の通過予
定軸跡３を中心としてその周囲を回動できるようになっ
ている。ロータ２における環状の支持板４には複数のシ
リンダー５が取付けられており、各シリンダー５の進退
杆５ａの先には夫々渦流探傷用のプローブ６が取付けで
ある。そしてシリンダー５の進退杆５ａを進退させるこ
とによって１０−ブ６と被検査材との間の距離を調節し
得るようになっている。上記ロータ２にはグーリーフが
取付けられ、固定的に設けられた駆動装置８（例えばモ
ーター）からプーリー９、ベルト１０等を介して回動力
を受は得る様になっている。又上記機枠１の近傍には電
子装置■が備わっている。この電子装置１１は周知の探
傷回路を備えている。A rotatable rotor 2 is provided inside the machine frame 1, which is fixedly provided, and is attached to the machine frame 1 via a bearing. Further, the rotor 2 is capable of rotating around an axis 3 through which the inspected material is scheduled to pass. A plurality of cylinders 5 are attached to the annular support plate 4 of the rotor 2, and a probe 6 for eddy current flaw detection is attached to the tip of the advancing/retracting rod 5a of each cylinder 5, respectively. By moving the advancing/retracting rod 5a of the cylinder 5 back and forth, the distance between the 10-bub 6 and the material to be inspected can be adjusted. A goolleaf is attached to the rotor 2, and receives rotational force from a fixedly provided drive device 8 (for example, a motor) via a pulley 9, a belt 10, etc. Further, an electronic device (2) is provided near the machine frame 1. This electronic device 11 is equipped with a well-known flaw detection circuit.
次に、上記機枠工とロータ２との間には複数の信号伝送
手段ν、１２・・・が備えられている。これらの信号伝
送手段校は、一つのグローブ６に関しては電子装置１１
からグローブ６に励磁用の信号を送る為のものとグロー
ブ６から電子装置Ｈに向けて探傷信号を送る為のものと
があシ、更に又複数のプローブ６の各々に対してそれら
励磁用信号及び探傷信号伝送用のものがある。上記各信
号伝送手段１２は第１基板１３と第２基板１４とを有し
ており、それらの基板の元部１３ａ、１４ａけ夫々機枠
１、ロータ２に固定しである。これらの基板ｕ、１４と
しては例えばガラスエポキシ、ベークライト等の強度の
高い絶縁材が用いられ、（テフロン等のように強度の低
いものの場合にはアルミ板その他本基板の全体に亘って
むらの無いものが用いられる。又上記各基板１３ 、１
４の対向面Ｌ３ｂ 、 １４ ｂはいずれも千邸面に形
成されておシ、はぼ平行する状態に対向させである。上
記の対向面１３ ｂ 、 １４ ｂには夫々うす巻状の
コイル１５ 、１６が備わっている。Next, a plurality of signal transmission means ν, 12, . . . are provided between the machine frame work and the rotor 2. These signal transmission means are connected to the electronic device 11 for one glove 6.
There is one for sending an excitation signal from the probe 6 to the globe 6, and another for sending a flaw detection signal from the globe 6 to the electronic device H. Furthermore, the excitation signal is sent to each of the plurality of probes 6. and for flaw detection signal transmission. Each of the signal transmission means 12 has a first substrate 13 and a second substrate 14, and base portions 13a and 14a of these substrates are fixed to the machine frame 1 and the rotor 2, respectively. For these substrates u, 14, a high-strength insulating material such as glass epoxy or Bakelite is used (in the case of a low-strength material such as Teflon, an aluminum plate or other insulating material is used evenly over the entire board). Also, each of the above-mentioned substrates 13, 1
The opposing surfaces L3b and 14b of No. 4 are both formed in the Sentei plane, and are opposed to each other in a substantially parallel state. The opposing surfaces 13b and 14b are provided with thinly wound coils 15 and 16, respectively.
これらのコイル市、１６は線径が均一な電線を複数回（
例えば数回乃至数７０回、−例としてはコ乙回）巻いて
構成してあシ、又各コイルは対向面１３ｂ。These coils, 16, are wires with uniform diameter multiple times (
For example, the coils are wound several times to several 70 times, for example, several times, and each coil has a facing surface 13b.
１４ ｂに例えば接着剤を用いて固定しである。更に又
これらのコイルは単層の構成となっているが、これは複
数層の構成にしても↓い。又上記コイル拓の一端のリー
ド線１５ａは第３図に示す如くそのまま外周方向に向け
て引き出されており、他端のり−ドｌｌ１１５ｂは基板
邦に形成された引出用の溝１７を介して外周方向に引き
出されて、コイル１５に凹凸が生じないようにしである
。尚この様な構成は他方のコイル１６に関しても同様と
なっている。上記コイルＬ５のリード線１５ａ、迅すは
前記電子装置Ｈに接続されており、他方のコイル１６の
リード線はプローブ６に接続されている。尚上記基板Ｕ
とコイル市（基板１４とコイル１６も同じ）の関連構成
は、絶縁板（基板邦となるべきもの）の−面に貼付けら
れた導体箔にエツチング手段を施してコイルを形成（プ
リントコイルと称されるもの）してもよい。14b using, for example, an adhesive. Furthermore, although these coils have a single-layer structure, they can also be made into a multi-layer structure. Further, the lead wire 15a at one end of the coil tube is pulled out as it is toward the outer circumference as shown in FIG. This is to prevent the coil 15 from being drawn out in the same direction and causing unevenness on the coil 15. Incidentally, this configuration is the same for the other coil 16 as well. The lead wire 15a of the coil L5 is connected to the electronic device H, and the lead wire of the other coil 16 is connected to the probe 6. In addition, the above board U
The related structure of the coil (board 14 and coil 16 are the same) is to form a coil by etching the conductive foil attached to the - side of the insulating board (which should be the board) (referred to as a printed coil). may be done).
次に、各信号伝送手段シ、１２相互間に配設された遮蔽
板Ｍｌ 、 １９は、隣シ合う信号伝送手段に相互間で
信号が混シ合わないように設けられたものであり、例え
ばアルミニウム板を用いて構成される０この様な遮蔽板
１８ 、１９を用いることによって、各信号伝送手段ν
、１２を相互に近接させて配置することができる。その
結果、多数の伝送手段νが備えられていてもそれらの寸
法（被検査材の移動方向の寸法）を小さくする事ができ
る。Next, the shielding plate Ml, 19 disposed between each signal transmission means 12 is provided to prevent signals from being mixed between adjacent signal transmission means, for example. By using such shielding plates 18 and 19 constructed using aluminum plates, each signal transmission means ν
, 12 can be arranged close to each other. As a result, even if a large number of transmission means ν are provided, their dimensions (dimensions in the moving direction of the inspected material) can be reduced.
上記構成のものにあｔては、駆動装置８によってグロー
ブ６が軌跡３の周囲に回動させられると共に、上記軌跡
３に沿って被検査材（熱間あるいは冷間の棒ｔｉｉ＞が
矢印方向に挿通される。この様な状態において電子装置
Ｕから送り出された励磁用の信号は一つの信号伝送手段
νにおけるコイルＬ５に与えられ、そのコイル正から電
磁結合によってコイル市に与えられる。コイル１６に与
えられた上記励磁用の信号はグローブ６に送られ、グロ
ーブ６からは被検査材に磁束が及はされる。この状態に
おいてグローブ６が被検査材の渦電流の変化を検出する
とその信号が探傷信号として上記とは異なる信号伝送手
段νのコイル１６に与えられる。In the case of the above configuration, the glove 6 is rotated around the trajectory 3 by the drive device 8, and the inspected material (hot or cold rod tii) is moved along the trajectory 3 in the direction of the arrow. In this state, the excitation signal sent from the electronic device U is applied to the coil L5 in one signal transmission means ν, and is applied from the positive side of the coil to the coil 16 by electromagnetic coupling. The excitation signal given to the above is sent to the globe 6, and the magnetic flux is applied to the material to be inspected from the globe 6. In this state, when the globe 6 detects a change in the eddy current of the material to be inspected, the signal is is applied as a flaw detection signal to the coil 16 of a signal transmission means ν different from the above.
この信号はコイル１６から電磁結合によってコイル１５
に与えられ、更にその信号はコイルＬ５から電子装置Ｈ
に向けて送られる。この様な信号伝送の結果、電子装置
１】において上記被検査材に存在する傷を検出すること
ができる。尚上記信号としては例えばざ〜２Ｓ乙蓮の信
号が用いられる。This signal is transmitted from the coil 16 to the coil 15 by electromagnetic coupling.
Further, the signal is sent from the coil L5 to the electronic device H.
sent towards. As a result of such signal transmission, it is possible for the electronic device 1 to detect flaws present in the inspected material. Incidentally, as the above-mentioned signal, for example, a signal of Za~2S Otoren is used.
尚上記のような構成の信号伝送手段の伝送効率は、その
測定結果の一例を示せば、励磁信号の側では約６θ％、
探傷信号の側では約ざ０％であ一つだ。The transmission efficiency of the signal transmission means configured as described above is approximately 6θ% on the excitation signal side, as an example of the measurement results.
On the flaw detection signal side, it is one with about 0%.
次に第ｊＰＸＪは本願の異なる実施例を示すものである
。この図は前記第１あるいは第２の基板を金属板２０（
アルミニウムあるいはオーステナイトステンレス）で構
成した場合の構造を示すもので、基板加には複数のスリ
ット２１が放射方向に向けて形成されている。この様な
スリット４を形成することによって、前記コイルによシ
この基板加に電流が誘起されることを防止することがで
き、その結果前記と同様の信号の伝送を安定に行なうこ
とができる。尚スリブ）２１の数は信号の周波数あるい
は基板加の板厚によって決められるべきものであり、上
記周波数あるいは板厚が大きくなるほど数を多くすると
良い。Next, the j-th PXJ shows a different embodiment of the present application. In this figure, the first or second substrate is connected to a metal plate 20 (
This figure shows a structure made of aluminum (aluminum or austenitic stainless steel), and a plurality of slits 21 are formed in the substrate in a radial direction. By forming such a slit 4, it is possible to prevent a current from being induced in the coil in addition to the substrate, and as a result, the same signal transmission as described above can be carried out stably. The number of the sleeves 21 should be determined by the frequency of the signal or the thickness of the substrate, and it is better to increase the number as the frequency or thickness increases.
なお、機能上前図のものと同−又は均等構成と考えられ
る部分には、前図と同一の符号にアルファベントのｅを
付して重複する説明を省略した。（また次図のものにお
いても同様の考えでアルファベットのｆを付して重複す
る説明を省略する。）次に第６図は更に異なる実施例を
示すもので、一つの基板］、ｌｆに二つのコイル幻、２
４を備えさせた例を示すものである。基板１３ ｆにこ
のように二つのコイル羽、２４を備えさせた場合、その
基板１３ｆと対向させるもう一方の基板においても同様
に、」・記者コイル幻、２４と対向する位置に夫々コイ
ルが備えられる。上記のような二つのコイルによっては
次のような信号が伝達される。It should be noted that parts that are functionally the same or equivalent to those in the previous figure are given the same reference numerals as in the previous figure with an alpha bent e, and redundant explanations are omitted. (Also, in the following figure, the same idea is given by adding the alphabet f and redundant explanation will be omitted.) Next, Fig. 6 shows a still different embodiment, in which one board], two parts for lf. Two coil illusions, 2
4 is shown. When the substrate 13f is provided with two coil wings 24 in this way, the other substrate facing the substrate 13f also has a coil provided at a position opposite to the reporter coil phantom 24. It will be done. The following signals are transmitted by the two coils as described above.
（１）電子装置から一つのチャンネルのプローブへの励
磁信号の伝達と、その反対方向への探傷信号の伝達
（２）電子装置から二つのチャンネルのグローブの各々
への励磁信号の伝達
（８）二つのチャンネルのグローブの各々から電子装置
への探傷信号の伝達
尚」二記基板上のコイルの数はよ）多数にしてもよい。(1) Transmission of the excitation signal from the electronic device to the probe of one channel and transmission of the detection signal in the opposite direction (2) Transmission of the excitation signal from the electronic device to each of the globes of the two channels (8) The number of coils on the substrate may be large.
以上のようにこの発明にあっては、ロータ２を回転させ
ることにより、グローブ６をして被検査材の周囲を回し
、探傷信号を回転基板１４のコイル１６に送ることがで
き、さらに上記の信号を静止している第１基板塾に備え
させたコイル１５に電磁結合によって伝え、このコイル
ｂを介して上記のグローブ６からの信号を目的とする電
子装置１１に送ることのできる効果がおる。As described above, in this invention, by rotating the rotor 2, the glove 6 can be rotated around the material to be inspected, and the flaw detection signal can be sent to the coil 16 of the rotating board 14. The effect is that the signal is transmitted by electromagnetic coupling to the coil 15 provided on the stationary first board, and the signal from the glove 6 can be sent to the target electronic device 11 via this coil b. .
さらに本発明にあっては、二つのコイル巧、１６の電磁
結合を利用するものであっても、相互に対向する第１１
第２基板１３ 、１４に対してその面に沿って複数回う
す巻状に巻かれたコイル１，５ 、１６によって信号伝
送するものであるから、信号の伝送過程にノイズの混入
が少なく、グローブからの良質の信号をそのまま電子装
置に送シ込むことのできる利点もある。またこの場合の
信号伝送効率もすこぶる良好となる効果がある。Furthermore, in the present invention, even if two coils are used and 16 electromagnetic couplings are used, the 11th
Since the signal is transmitted by the coils 1, 5, 16 which are spirally wound multiple times along the surfaces of the second substrates 13, 14, there is less noise in the signal transmission process, and the glove Another advantage is that high-quality signals can be directly transmitted to electronic devices. Moreover, the signal transmission efficiency in this case also has the effect of being extremely good.
さらに上記の効果は信号の周波数が高い場合は勿論、信
号の周波数が低い場合についても全く同様に期待できる
効果がある。Furthermore, the above effects can be expected not only when the signal frequency is high, but also when the signal frequency is low.
図面は本願の実施例を示すもので、第７図は探傷機の平
面図、第２図は信号伝送手段の縦断面部分図、第３図は
第１基板及びそれに備えられたコイルの正面図、第を図
は■矢視図、第５図は基板の異なる例を示す正面図、第
６図は更に異なる実施例を示す第３図と同様の図。
１・・・機枠、２・・・ロータ、６・・・グローブ、ν
・・・信号伝送手段、１３ 、１４・・・基板、郷、１
６・・・コイル。The drawings show an embodiment of the present application, and FIG. 7 is a plan view of the flaw detector, FIG. 2 is a vertical cross-sectional partial view of the signal transmission means, and FIG. 3 is a front view of the first board and the coil provided thereon. , Fig. 5 is a front view showing a different example of the substrate, and Fig. 6 is a view similar to Fig. 3 showing a further different embodiment. 1... Machine frame, 2... Rotor, 6... Globe, ν
...Signal transmission means, 13, 14...Substrate, town, 1
6...Coil.
Claims (1)
１及び第２基板を並設状具備させると共に第７基板は機
枠に固着し、他方の第２基板は被検査材の通過予定軌跡
の周囲にあってその軌跡の周囲を回転するように備えさ
せであるロータに連結して上記の軌跡の周囲を回動させ
得るように構成し、さらに上記第１と第２基板における
相対向面にはその面に沿って夫々複数回うず巻状に巻か
れたコイルを配設し、一方、上記ロータには上記被検査
材の通過予定軌跡の周囲を回動させるようにしたグロー
ブを具備させると共にこのグローブと上記第２基板のコ
イルとを接続し、第１基板のコイルは電子装置に接続し
たことを特徴とする回転グローブ式渦流探傷機。Two hollow annular first and second substrates are provided in parallel around the expected passing trajectory of the inspected material, and the seventh substrate is fixed to the machine frame, while the other second substrate is used to prevent the inspected material from passing. The rotor is arranged around a planned trajectory and is configured to rotate around the trajectory by being connected to a rotor so as to rotate around the trajectory; Coils each wound in a spiral shape a plurality of times along the opposite surface are disposed, and the rotor is equipped with a glove that rotates around the expected passage trajectory of the material to be inspected. A rotating globe type eddy current flaw detector characterized in that the globe is connected to the coil of the second substrate, and the coil of the first substrate is connected to an electronic device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58097369A JPH0643987B2 (en) | 1983-06-01 | 1983-06-01 | Rotating probe eddy current flaw detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58097369A JPH0643987B2 (en) | 1983-06-01 | 1983-06-01 | Rotating probe eddy current flaw detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59222758A true JPS59222758A (en) | 1984-12-14 |
| JPH0643987B2 JPH0643987B2 (en) | 1994-06-08 |
Family
ID=14190588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58097369A Expired - Lifetime JPH0643987B2 (en) | 1983-06-01 | 1983-06-01 | Rotating probe eddy current flaw detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0643987B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007298514A (en) * | 2006-04-28 | 2007-11-15 | Biosense Webster Inc | Reduced magnetic field distortion in medical tool |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS547392A (en) * | 1977-06-20 | 1979-01-20 | Hitachi Cable Ltd | Eddy current flaw detecting apparatus of rotary probe type |
| JPS5762714A (en) * | 1980-10-03 | 1982-04-15 | Tokyo Shibaura Electric Co | Cable drum slip ring |
-
1983
- 1983-06-01 JP JP58097369A patent/JPH0643987B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS547392A (en) * | 1977-06-20 | 1979-01-20 | Hitachi Cable Ltd | Eddy current flaw detecting apparatus of rotary probe type |
| JPS5762714A (en) * | 1980-10-03 | 1982-04-15 | Tokyo Shibaura Electric Co | Cable drum slip ring |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007298514A (en) * | 2006-04-28 | 2007-11-15 | Biosense Webster Inc | Reduced magnetic field distortion in medical tool |
| US9364293B2 (en) | 2006-04-28 | 2016-06-14 | Biosense Webster, Inc. | Reduced field distortion in medical tools |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0643987B2 (en) | 1994-06-08 |
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