Transducer guided wave electromagnetic acoustic
US6920792B2 · kind B2 · utility
59Cited by
14References
36Claims
0Family size
Inventors
Key dates
| Filing date | May 5, 2003 |
| Grant date | Jul 26, 2005 |
| Priority date | — |
| Expiry date | May 27, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/2634
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A guided wave electromagnetic acoustic transducer for detecting defects in moving metallic products such as rods, tubes and the like and which has coils energized by pulse of a few cycles of a high frequency alternating voltage which produces an alternating field in the product, the coils being alternately wound and connected in series and measuring dynamic acoustic stress that is a function of the radial distance from the center of the product being tested and produces a reading that is different than that showing a surface defect in the product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.