Ultrasonic inspection of a cylindrical object
US4184374A · kind A · utility
23Cited by
5References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1978 |
| Grant date | Jan 22, 1980 |
| Priority date | — |
| Expiry date | Jun 22, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/0426
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and an apparatus are provided for ultrasonically inspecting a cylindrical object. The object is placed between the poles of a magnet to create a circumferential magnetic field in the object. A group of electromagnetic transducers (EMAT's) are placed adjacent the material so that the transducers scan the entire object when it is rotated. When an RF signal is applied to the transducers, elastic waves are generated in the material. These elastic waves reflect from defects in the material and these reflections are received by the transducers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.