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:
May. 17, 2022
Filed:
Jun. 27, 2017
University of Pretoria, Pretoria, ZA;
David Hercules Diamond, Pretoria, ZA;
Philippus Stephanus Heyns, Pretoria, ZA;
Abraham Johannes Oberholster, Pretoria, ZA;
University of Pretoria, Pretoria, ZA;
Abstract
A method () of measuring rotor blade tip deflections of turbomachine rotor blades (R, R) during operation using Blade Tip Timing (BTT) includes measuring (), by a proximity sensor (), a proximity signal caused by a moving rotor blade (R, R) and determining (), by a control module (), a Time-of-Arrival (ToA). The method () includes measuring a time that the shaft starts to rotate a measurable angular distance and a time the shaft has completed its rotation of the measurable distance and storing () timing data indicative of a plurality of ToA measurements of the rotor blade (R, R) and the zero crossing times. The method () includes determining the shaft Instantaneous Angular Position (IAP) between at least two zero crossing times, which determination comprises expressing the shaft IAP between at least two zero crossing times as a continuous, non-constant IAP mathematical function of time, with unknown function coefficients and calculating the unknown function coefficients of the IAP mathematical function.