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. 02, 2002
Filed:
Oct. 06, 2000
Frank J. Moizio, Dallas, TX (US);
James C. Shouse, Dallas, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A method of correcting the output of a rotary displacement transducer so as to remove spin frequency noise error. For each revolution of the transducer, a series of transducer output values is accumulated. Each output value represents a time interval between transducer pulses. These output values are used to calculate sin and cosine values of a sin wave and cosine wave having a period determined by the transducer resolution. From the sin and cosine waves, a quadrature and an inphase value are obtained, and the latter values are used to calculate magnitude and phase values of a correction sin wave having the same transducer periodicity. The magnitude and phase values are used to calculate a correction value for each transducer output value.