The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 17, 2012
Filed:
May. 01, 2009
Kurt Steinke, Vancouver, WA (US);
Michael F. Klopfenstein, Portland, OR (US);
Bradley B. Branham, Vancouver, WA (US);
Kurt Steinke, Vancouver, WA (US);
Michael F. Klopfenstein, Portland, OR (US);
Bradley B. Branham, Vancouver, WA (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
Methods of compensating for position errors due to signal scaling, linearity, and offset between first and second members in a displacement transducer are provided, including: producing a first signal at the first member; producing a second signal at the first member; modulating the first signal at the second member to include at least one region with an invariant amplitude as the first and second members are displaced relative to one another along a measurement axis; determining a relation between a sample of the second signal and the invariant amplitude of the first signal as an indication of an error parameter; and generating a compensated sample based upon the determined relation.