Electromagnetic acoustic transducer for tube inspection
US4320661A · kind A · utility
12Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1979 |
| Grant date | Mar 23, 1982 |
| Priority date | — |
| Expiry date | Oct 19, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/044
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electromagnetic transducer for exciting selected modes of ultrasonic vibration in a tubular body. The transducer includes a plurality of rows of permanent magnets of alternating polarity with a coil provided about the magnets whereby a current is conducted through the magnetic fields. The rows of magnets are provided in carriers which are yieldably biased towards the inner surface of a tubular body during inspection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.