Electricity: measuring and testing – Electrical speed measuring – Including speed-related frequency generator
Patent
1981-05-01
1984-04-24
Krawczewicz, Stanley T.
Electricity: measuring and testing
Electrical speed measuring
Including speed-related frequency generator
324176, G01P 336
Patent
active
044450877
ABSTRACT:
The instantaneous angular velocity of a rotating shaft or the like is translated from the relative rotation of a mark carrier, having a scale of marks, and a sensing device. A series of signals are produced and processed in a calibrating run and thereafter in a series of operating runs. In the calibrating run, the time distance of the sensed signals between at least one pair of the marks is measured and from it a calibrating value is calculated corresponding to the absolute angular distance between the marks and thereafter stored. During the operation runs, the instantaneous time distance of the sensed signals between the marks is measured and the instantaneous velocity is obtained by comparing it with the stored calibrating value.
REFERENCES:
patent: 3631443 (1971-12-01), Halfhill et al.
patent: 3691440 (1972-09-01), Haddock
patent: 3735260 (1973-05-01), Hartline et al.
Thomas, Jr., Velocity Measuring Device, IBM Technical Disclosure Bull., Dec. 1971, p. 2116.
Wang, Determining Velocity, Stress, And Strain of Moving Tape, IBM Technical Disclosure Bull., Dec. 1960, pp. 12-14.
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