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:
Mar. 04, 1986
Filed:
Oct. 05, 1982
Wilmer A Mickelson, Cedar Rapids, IA (US);
Rockwell International Corporation, El Segundo, CA (US);
Abstract
An apparatus and technique is disclosed for demodulating an FM signal provided as an output from a sensor assembly. The FM signal may represent acceleration as measured by a sensor included on a rotating wheel in an attitude and heading reference system. The FM signal is demodulated and directly converted to a digital value to provide digital signal processing with improved performance characteristics. The demodulation is accomplished by detecting each FM cycle to provide a signal output at the occurrence of each cycle. A reference mark on the rotating wheel is detected for providing synchronization such that a demodulation angle of the rotating wheel can be determined. The demodulation angle is represented as a sine value which is read for each FM cycle during one sensor revolution and summed with all previous sine values detected during that one revolution. A digital output of that sum is then provided as a measurement of acceleration or other parameter along an axis of the system.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile