EDDY_CURRENT_WIRE_FLAW_DETECTOR

Published:2009/7/22 20:36:00 Author:Jessie | From:SeekIC

High-sensitivity eddy-current instrument gives me tor indication or permanent record of surface or internal tracts and voids smaller than 0.001 inch in 0.055-inch-diameter zirconium wire used for positioning fuel elements of nuclear reactors. Wire is run through probe coil energized at 150 kc by crystal oscillator, and change in impedance of coil due to law is measured with modified Owens bridge. Output of bridge is amplified in five stages, then rectified for measurement by d-c differential Voltmeter. -R. G. Myers and C. J. Renken, Detecting Invisible Flaws in Wire, Electronics, 31:39, p 72-73.



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