Boots – shoes – and leggings
Patent
1990-02-21
1992-02-18
Lall, Parshotam S.
Boots, shoes, and leggings
73460, 73462, 364508, G06F 1520, G01M 116, G01M 100, G01M 700
Patent
active
050899694
ABSTRACT:
A shaft synchronous balancing apparatus wherein a rotor to be balanced is rotated in conjunction with appropriate balance plane located transducers and a non-contacting shaft monitoring pick-up, for example of an optical variety. The latter pick-up derives a one times per revolution reference signal which is treated by a software driven process control system including dual timer-counters to evaluate the period of revolution, T, and to develop N incremental sampling pulses having a duration or time constant of T/N. Preferably, N is an even integer power of 2. Periodic updating of the duration of a time constant is developed utilizing only one software interrupt in conjunction with the two counter timers. A nulling technique for canceling offset at the signal treatment stages is provided which accommodates for the high amplification levels necessary at the front end of the system. Additionally, a gain adjust feature achieves optimum precision and reliability for the system by performing within three discrete ranges.
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Bradshaw Charles
Hansford Mike
Tack Bill
Winterbottom John
IRD Mechanalysis, Inc.
Lall Parshotam S.
Pipala Edward J.
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