Electromagnetic acoustic transducer (EMAT) inspection of tubes for surface defects
US6164137A · kind A · utility
67Cited by
8References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1999 |
| Grant date | Dec 26, 2000 |
| Priority date | — |
| Expiry date | Feb 3, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/2634
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An EMAT testing device for nondestructively testing tubes for surface defects and displaying the results has a EMAT transmitter arranged collinear with a pair of EMAT receivers. The EMAT receivers each receive a pair of oppositely propagating circumferential acoustic surface waves from the transmitter at different times and the relative amplitudes of the received waves are compared to located defects adjacent the receivers in the tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.