Other

White's Electronics, Inc.

Phillip R Hays

Jefferson Patrick Ward

Steven T Castle

Eric L Ahlvin

Michael Howard Linse

Thomas V Scrivner

Jimmy Jack Jewell

Gary J Oliver

Metal detectors include a sense coil coupled to an analog to digital converter that produces a numeric representation of an electrical signal associated with a conductive object situated in an active region of a sense coil. The numeric representation is processed to obtain a noise contribution associated with random noise, fixed pattern noise, and/or thermal drift. The noise is subtracted from the numeric representation to produce a numeric difference. The numeric difference includes contributions associated with conductive objects located in a sense volume defined by the sense coil. The numeric difference (or the numeric representation) can be digitally processed with, for example, a matched filter to enhance the conductive object contribution. The matched filter can be based on a measured sense coil speed or can be based on typical sense coil speeds.

Metal detection methods and apparatus wherein a numeric representation of the sense signal and a noise contribution to the sense signal are produced

A pen adapter is configured, in one example, to include a body having an internal surface defining a set of negative datum features configured to interlock with a first set of positive datum features. An external surface of the pen adapter is configured to define a second set of positive datum features.

Inkjet pen adapter

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Corvallis, OR, United States of America

Phillip R Hays