DISPLACEMENT MEASUREMENT SYSTEM AND METHOD USING MAGNETIC ENCODINGS

Title:

DISPLACEMENT MEASUREMENT SYSTEM AND METHOD USING MAGNETIC ENCODINGS

Document Type and Number:

WIPO Patent Application WO/2011/100412

Kind Code:

A3

Abstract:

A measurement system includes a rotating member configured to transfer mechanical energy to a point of use. The member has at a surface thereof one or more circumferentially oriented bands of magnetizable material. Each band has a magnetic pattern comprised of a plurality of transitions magnetically recorded in the magnetizable material of that band. A magnetic-field sensor is disposed sufficiently near each band of magnetizable material to sense a magnetic pattern recorded in that band as the member rotates. Each magnetic-field sensor generates signals in response to the magnetic pattern sensed by that magnetic-field sensor. Processing electronics is in communication with each magnetic-field sensor to receive the signals generated by that magnetic-field sensor while the member rotates and to dynamically compute from the signals a measurement associated with a performance of the rotating member.

Inventors:

FULKERSON KURT D (US)
ARNS DONALD C JR (US)
SECHI PAOLO G (US)

Application Number:

PCT/US2011/024323

Publication Date:

November 17, 2011

Filing Date:

February 10, 2011

Export Citation:

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Assignee:

FULKERSON KURT D (US)
STANFORD RES INST INT (US)
ARNS DONALD C JR (US)
SECHI PAOLO G (US)

International Classes:

G01D5/12; G01B7/30; G01R33/02

Foreign References:

JP2008267868A	2008-11-06
US20070000336A1	2007-01-04
US20020030482A1	2002-03-14

Other References: