Eddy current probe having one yoke within another yoke for increased inspection depth, sensitivity and discrimination
US5446382A · kind A · utility
30Cited by
22References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 23, 1993 |
| Grant date | Aug 29, 1995 |
| Priority date | — |
| Expiry date | Jun 23, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/902
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Defects such as corrosion located on either the inner diameter or outer diameter of a covered metal component are detected through eddy current inspection. At least two concentric magnetizing yokes are held fixed with respect to each other and are scanned over the cover of the component. A magnetic flux sensor on the leg of each yoke detects changes in the magnetic flux that penetrates at different depth regions in the covered metal component, depending on the relative postion of each magnetizing yoke.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.