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Eddy-Current Inspection Of Tab Seals On Beverage CansEddy-current inspection system monitors tab seals on beverage cans. Device inspects all cans at usual production rate of 1,500 to 2,000 cans per minute. Automated inspection of all units replaces visual inspection by microscope aided by mass spectrometry. System detects defects in real time. Sealed cans on conveyor pass near one of two coils in differential eddy-current probe. Other coil in differential eddy-current probe positioned near stationary reference can on which tab seal is known to be of acceptable quality. Signal of certain magnitude at output of probe indicates defective can, automatically ejected from conveyor.
Document ID
19940000548
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Bar-Cohen, Yoseph
(Caltech)
Date Acquired
August 16, 2013
Publication Date
October 1, 1994
Publication Information
Publication: NASA Tech Briefs
Volume: 18
Issue: 10
ISSN: 0145-319X
Subject Category
Electronic Systems
Report/Patent Number
NPO-18758
Accession Number
94B10548
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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