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. 24, 2001
Filed:
Aug. 25, 1999
Joseph A. Hogle, Roanoke, VA (US);
General Electric Company, Schenectady, NY (US);
Abstract
A vibration phasor monitoring system for real time determination of a vibration phasor magnitude and angle including a quadrature detector, implemented in software or hardware, whose reference phasors are locked in phase, via hardware, to a physical reference point on a rotating shaft. A vibration transducer and a transducer that senses a complete revolution of the shaft are disposed around the shaft. The transducers may be axially separated along the shaft. A clocking arrangement is implemented to determine the shaft angle at the time an output of the vibration transducer is read. Thereafter, the sine and cosine of the determined shaft angle are obtained and are used to multiply the vibration transducer output reading thereby resulting in respective projections of the vibration phasor on the sine and cosine reference phasors. These projections are then manipulated to obtain the vibration phasor angle and magnitude. Harmonic analysis in easily implemented by multiplying the generated shaft angle.