Electromagnetic flux leakage inspection system for ferromagnetic tubes
US4649343A · kind A · utility
9Cited by
8References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1983 |
| Grant date | Mar 10, 1987 |
| Priority date | — |
| Expiry date | Dec 27, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/9046
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electromagnetic inspection system for detecting, in-situ, the location and character of flaws in a relatively long, thick-walled small bore tube of a heat exchanger wherein a resultant magnetic field is induced in the wall of the tube of selected direction and magnitude by the vector addition of the magnetic fields produced by two magnetic field generators, at least one of which is carried by a scanner for traversing the tube and having an array of sensors mounted in close proximity to the wall of the tube generating a unique signal as the scanner passes a flaw in the tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.