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:
Aug. 27, 2019
Filed:
Jun. 12, 2017
Rolls-royce Plc, London, GB;
Arthur L Rowe, Derby, GB;
Mark N Binnington, Bristol, GB;
Colin J Woodward, Derby, GB;
Paul R Thornton, Derby, GB;
ROLLS-ROYCE plc, London, GB;
Abstract
A rotor assembly () comprising a rotor () having an annular array of rotor blades (), the rotor mounted to a shaft (). A phonic wheel () coupled to the shaft. A speed sensor () axially aligned with the phonic wheel and configured to measure voltage (V), amplitude of the voltage being proportional to clearance () between the sensor and phonic wheel. A processor () configured to: receive the voltage measurement; derive shaft speed (ω) from the voltage measurement; identify modulation of the voltage amplitude at a frequency which is an integer multiple of the shaft speed; compare voltage amplitude to a threshold; and output a rotor damage signal based on the comparison.