H - Electricity – 04 – L
Patent
H - Electricity
04
L
340/148, 340/76
H04L 1/00 (2006.01) G01H 1/00 (2006.01)
Patent
CA 1303176
53009 -18- ABSTRACT OF THE DISCLOSURE A method is disclosed for eliminating aberrations in position-time data provided by an apparatus which monitors the position of a rotating blade in a turbo machine as a function periodic rotation, the apparatus including at least one sensor adjacent at least one blade position to provide a time signal corresponding to the actual arrival time required for a blade to move from a predetermined position to the at least one sensor position, the aberrations being caused by misalignment or movement of the at least one sensor with respect to a rotating blade. The method comprises the steps of first calculating an average blade arrival time for blade movement from the predetermined position to the at least one sensor position, and then estimating sensor position relative to the predetermined position based on blade velocity and average arrival time. Alternatively, measured displacements between blade position and sensor position at the average blade arrival time may be used to derive a time signal indicative of blade vibration.
560260
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Westinghouse Electric Corporation
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