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:
Dec. 22, 2015
Filed:
Aug. 31, 2011
James Saloio, Jr., Ludlow, MA (US);
Robert E. Cox, Somers, CT (US);
James Saloio, Jr., Ludlow, MA (US);
Robert E. Cox, Somers, CT (US);
Hamilton Sundstrand Corporation, Windsor Locks, CT (US);
Abstract
A system comprises a vibration sensor for generating a vibration signal on a turbomachine, a signal conditioner for conditioning the vibration signal, and a test signal generator for calibrating the signal conditioner. The test signal generator calibrates the signal conditioner with a test signal having a base frequency and a modulation frequency. The signal conditioner introduces a phase error into the vibration signal, and the signal conditioner introduces a phase shift into the test signal. A processor compensates for the phase error in the vibration signal by correcting the vibration signal based on the phase shift in the test signal, where the processor determines the phase shift in the test signal based on harmonic analysis of the modulation frequency.