Boots – shoes – and leggings
Patent
1991-03-26
1992-12-08
Lall, Parshotam S.
Boots, shoes, and leggings
364569, 361236, 416 44, 416 35, 73506, G01P 342, F01D 2100
Patent
active
051703653
ABSTRACT:
A speed and phase sensor counterrotates aircraft propellers. A toothed wheel is attached to each propeller, and the teeth trigger a sensor as they pass, producing a sequence of signals. From the sequence of signals, rotational speed of each propeller is computer based on time intervals between successive signals. The speed can be computed several times during one revolution, thus giving speed information which is highly up-to-date. Given that spacing between teeth may not be uniform, the signals produced may be nonuniform in time. Error coefficients are derived to correct for nonuniformities in the resulting signals, thus allowing accurate speed to be computed despite the spacing nonuniformities. Phase can be viewed as the relative rotational position of one propeller with respect to the other, but measured at a fixed time. Phase is computed from the signals.
REFERENCES:
patent: 4153388 (1979-05-01), Naegeli et al.
patent: 4356447 (1982-10-01), Honig et al.
patent: 4383303 (1983-05-01), Hoffman
patent: 4506339 (1985-03-01), Kuhnlein
patent: 4535288 (1985-08-01), Vitulli, Jr.
patent: 4569027 (1986-02-01), Nakano et al.
patent: 4653981 (1987-03-01), Harner et al.
Bennett George W.
Collopy Paul D.
General Electric Company
Lall Parshotam S.
Shay Bernard E.
Squillaro Jerome C.
Zanelli Michael
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