Electrodynamic ultrasonic transducer

Details Electrodynamic ultrasonic transducer Electrodynamic ultrasonic transducer

1991-11-01

1992-09-15

Eldred, J. W.

Communications, electrical: acoustic wave systems and devices

Signal transducers

73643, H04R 2300

Patent

active

051484145

ABSTRACT:
An electrodynamic ultrasonic transducer, for testing a workpiece, has a pair of spaced permanent magnets, a transducer coil, a concentrator, and a non-ferromagnetic member which partially surrounds the concentrator. In order to concentrate the magnetic lines of flux, the concentrator has a cross-sectional area which is smaller than the cross-sectional area of the adjacent permanent magnets. A transducer coil is acted on by a high frequency transmission pulse, whereby ultrasonics is produced in the workpiece to be tested.

REFERENCES:
patent: 3963980 (1976-06-01), Shkarlet
patent: 4058002 (1977-11-01), Moran

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