Electromagnetic acoustic transducer for tube inspection

Details Electromagnetic acoustic transducer for tube inspection Electromagnetic acoustic transducer for tube inspection

1979-10-19

1982-03-23

Kreitman, Stephen A.

Measuring and testing

Vibration

By mechanical waves

G01N 2904

Patent

active

043206611

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.

REFERENCES:
patent: 3600613 (1971-08-01), Clarke
patent: 3850028 (1974-11-01), Thompson et al.
patent: 4092868 (1978-06-01), Thompson et al.
patent: 4127035 (1978-11-01), Vasile

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