High temperature electromagnetic acoustic transducer

Details High temperature electromagnetic acoustic transducer High temperature electromagnetic acoustic transducer

1997-07-25

2000-10-03

Moller, Richard A.

Measuring and testing

Vibration

By mechanical waves

G01N 2904

Patent

active

061257060

ABSTRACT:
An improved high temperature electromagnetic acoustic transducer (EMAT) for conducting inspections of materials with elevated temperatures, which has cooling means using gas cooling, such as air or nitrogen, for cooling the transducer RF coil, the onboard circuitry and magnets, while also providing for the easy removal of the coil and onboard circuitry. Prior art EMAT's are susceptible to failure since high temperatures reduces the signal quality of the electronics components, degrades the insulation of the RF coils, and permanent magnets can loose field strength.

REFERENCES:
patent: 4100809 (1978-07-01), Bobrov et al.
patent: 4184374 (1980-01-01), Thompson et al.
patent: 4578999 (1986-04-01), Abend et al.
patent: 4777824 (1988-10-01), Alers et al.
patent: 5511424 (1996-04-01), MacLauchlan et al.
patent: 5619423 (1997-04-01), Scrantz
patent: 5689070 (1997-11-01), Clark et al.

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