JPS6284750U - - Google Patents
Info
- Publication number
- JPS6284750U JPS6284750U JP17706885U JP17706885U JPS6284750U JP S6284750 U JPS6284750 U JP S6284750U JP 17706885 U JP17706885 U JP 17706885U JP 17706885 U JP17706885 U JP 17706885U JP S6284750 U JPS6284750 U JP S6284750U
- Authority
- JP
- Japan
- Prior art keywords
- coil
- eddy current
- metal object
- detection coil
- detection 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 13
- 238000004804 winding Methods 0.000 claims description 6
- 230000007547 defect Effects 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 7
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Description
第１図及び第２図は共に本考案による渦電流探
傷装置の一実施例を示す図であつて第１図は探傷
子の検出コイルの構成例を示す図、第２図は探傷
子の機能ブロツク線図の一例を示す図、第３図は
細管等探傷用検出コイルの形状と動作原理を示す
図、第４図は渦電流探傷装置の構成例を示す図、
第５図は従来の渦電流探傷器の機能ブロツク線図
、第６図及び第７図は欠陥以外の要因と信号波形
例とを示す図である。
１０１，１０２……巻き幅の大きい検出コイル
、３０１，３０２……巻き幅の小さい検出コイル
、３１……可変インピーダンス、３２……発振回
路、３３……増幅回路、３４……位相検波回路、
３５……駆動回路、３６……高速スイツチング回
路、１１４′……探傷器、１１５……ペン書きレ
コーダ、１２０，１２１……ケーブル。
1 and 2 are diagrams showing an embodiment of the eddy current flaw detection device according to the present invention, in which FIG. 1 shows an example of the configuration of the detection coil of the flaw detector, and FIG. 2 shows the function of the flaw detector. Figure 3 is a diagram showing an example of a block diagram, Figure 3 is a diagram showing the shape and operating principle of a detection coil for flaw detection of thin tubes, etc., Figure 4 is a diagram showing an example of the configuration of an eddy current flaw detection device,
FIG. 5 is a functional block diagram of a conventional eddy current flaw detector, and FIGS. 6 and 7 are diagrams showing factors other than defects and examples of signal waveforms. 101, 102...Detection coil with a large winding width, 301, 302...Detection coil with a small winding width, 31...Variable impedance, 32...Oscillation circuit, 33...Amplification circuit, 34...Phase detection circuit,
35... Drive circuit, 36... High speed switching circuit, 114'... Flaw detector, 115... Pen writing recorder, 120, 121... Cable.
Claims (1)
電することにより上記金属物体に渦電流を生じせ
しめ、この渦電流により変化する上記検出コイル
のインピーダンスを検知することにより上記金属
物体中の欠陥を探傷する渦電流探傷装置において
、巻き幅、巻き付けピツチの大きい第１のコイル
の中心に巻き幅、巻き付けピツチの小さい第２の
コイルを配置してなる検出コイルを用い、この検
出コイルの駆動される第１、第２のコイルを選択
する切換手段を具備したことを特徴とする渦電流
探傷装置。 An eddy current is generated in the metal object by passing an alternating current through a detection coil close to the metal object, and defects in the metal object are detected by detecting the impedance of the detection coil that changes due to the eddy current. In an eddy current flaw detection device, a detection coil is used in which a second coil with a small winding width and winding pitch is arranged at the center of a first coil with a large winding width and winding pitch, and An eddy current flaw detection device characterized by comprising a switching means for selecting a second coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17706885U JPS6284750U (en) | 1985-11-18 | 1985-11-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17706885U JPS6284750U (en) | 1985-11-18 | 1985-11-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6284750U true JPS6284750U (en) | 1987-05-29 |
Family
ID=31117922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17706885U Pending JPS6284750U (en) | 1985-11-18 | 1985-11-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6284750U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4676080B2 (en) * | 2000-03-24 | 2011-04-27 | インモビリーエンゲゼルシャフト・ヘルムート・フィッシャー・ゲーエムベーハー・ウント・コンパニイ・カーゲー | Method and apparatus for nondestructive measurement of thin layer thickness |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5256989A (en) * | 1975-11-05 | 1977-05-10 | Kobe Steel Ltd | Detector for detecting flaw by eddy current |
-
1985
- 1985-11-18 JP JP17706885U patent/JPS6284750U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5256989A (en) * | 1975-11-05 | 1977-05-10 | Kobe Steel Ltd | Detector for detecting flaw by eddy current |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4676080B2 (en) * | 2000-03-24 | 2011-04-27 | インモビリーエンゲゼルシャフト・ヘルムート・フィッシャー・ゲーエムベーハー・ウント・コンパニイ・カーゲー | Method and apparatus for nondestructive measurement of thin layer thickness |
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