SINGLE-PASS FLAW DETECTOR FOR MAGNETIC MEDIA

Authors
HUBER WD
Citation
Wd. Huber, SINGLE-PASS FLAW DETECTOR FOR MAGNETIC MEDIA, IEEE transactions on magnetics, 30(6), 1994, pp. 4149-4151
Citations number
13
Categorie Soggetti
Engineering, Eletrical & Electronic","Physics, Applied
Journal title
IEEE transactions on magnetics → ACNP
ISSN journal
00189464
Volume
30
Issue
6
Year of publication
1994
Part
1
Pages
4149 - 4151
Database
ISI
SICI code
0018-9464(1994)30:6<4149:SFDFMM>2.0.ZU;2-T
Abstract
A simple flaw detector that enables reliable single-pass defect locati on in magnetic media is described and analyzed. The envelope of the pl ayback signal is detected in a phase-independent manner, small variati ons in envelope indicate the presence of a defect. The detector may be configured as a biased or unbiased estimator of the envelope of the i nput signal. Synchronous, asynchronous, analog, digital, biased, and u nbiased forms are discussed.