JPS567054A - Magnetic flaw detector for rope - Google Patents
Magnetic flaw detector for ropeInfo
- Publication number
- JPS567054A JPS567054A JP8133779A JP8133779A JPS567054A JP S567054 A JPS567054 A JP S567054A JP 8133779 A JP8133779 A JP 8133779A JP 8133779 A JP8133779 A JP 8133779A JP S567054 A JPS567054 A JP S567054A
- Authority
- JP
- Japan
- Prior art keywords
- rope
- coil
- detection coil
- exciter
- mold
- 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
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
PURPOSE: To eliminate the need for a magnetic shielding plate for the coil mold of the detection coil in a magnetic flaw detector by forming the coil mold of conductive nonmagnetic material, which is grounded.
CONSTITUTION: A traveling rope 1 under test is passed through holes of a pair of pole pieces 4a and 4b of an exciter 2, and a given section of the rope is magnetized by the electromagnetic force of an exciter body 3 comprising an electromagnetic coil. The power for the exciter body 3 is supplied from a power source 5 comprising a transformer 5a, rectifier 5b, smoothing circuit 5c, or the like. Thus, if the rope 1 has such damage as broken wires, the magnetic flux in the rope 1 is disordered, so that a leakage flux is produced on the surface. Consequently, a minute voltage is induced in a detection coil 6, and recorded as a damage signal on a recorder 8. Since a coil mold 9 wound around the detection coil 6 is formed of a conductive nonmagnetic material and grounded, external noises, which are allowed to escape, substantially have no effect on the detection coil 6.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8133779A JPS5842425B2 (en) | 1979-06-29 | 1979-06-29 | Rope magnetic flaw detection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8133779A JPS5842425B2 (en) | 1979-06-29 | 1979-06-29 | Rope magnetic flaw detection equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS567054A true JPS567054A (en) | 1981-01-24 |
| JPS5842425B2 JPS5842425B2 (en) | 1983-09-20 |
Family
ID=13743550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8133779A Expired JPS5842425B2 (en) | 1979-06-29 | 1979-06-29 | Rope magnetic flaw detection equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5842425B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11230945A (en) * | 1998-02-09 | 1999-08-27 | Hitachi Building Systems Co Ltd | Magnetic flaw-detecting device of wire rope |
| JP2009265008A (en) * | 2008-04-28 | 2009-11-12 | Hitachi Building Systems Co Ltd | Flow detector for wire rope |
| JP2011516894A (en) * | 2008-04-16 | 2011-05-26 | インスティトゥート ドクター フェルスター ゲーエムベーハー ウント コー カーゲー | Method and apparatus for detecting defects near a surface by measuring leakage flux |
-
1979
- 1979-06-29 JP JP8133779A patent/JPS5842425B2/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11230945A (en) * | 1998-02-09 | 1999-08-27 | Hitachi Building Systems Co Ltd | Magnetic flaw-detecting device of wire rope |
| JP2011516894A (en) * | 2008-04-16 | 2011-05-26 | インスティトゥート ドクター フェルスター ゲーエムベーハー ウント コー カーゲー | Method and apparatus for detecting defects near a surface by measuring leakage flux |
| US8816681B2 (en) | 2008-04-16 | 2014-08-26 | Institut Dr. Foerster Gmbh & Co. Kg | Method and device for detecting near-surface defects by means of magnetic leakage flux measurement |
| JP2009265008A (en) * | 2008-04-28 | 2009-11-12 | Hitachi Building Systems Co Ltd | Flow detector for wire rope |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5842425B2 (en) | 1983-09-20 |
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