Device for angle of rotation determination

Details Device for angle of rotation determination Device for angle of rotation determination

1982-12-23

1985-11-19

Corbin, John K.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

340347P, 356395, G01D 534

Patent

active

045544506

ABSTRACT:
In a device for determining the angle of rotation of a rotating member by use of a perforated disk which corotates with the rotating member and intermittently interrupts a continuous beam of light directed at the perforations of the disk, an improvement comprises providing perforations of the disk which define light permeable and light impermeable areas such that a width of the light permeable areas is less than a width of the light impermeable areas, and a width of the light permeable areas is approximately the same as a width of an aperture at a light receiving station. A symmetrical output signal is obtainable so as to increase a resolution of the angle of rotation measurement.

REFERENCES:
patent: 2944157 (1960-07-01), McAuslan et al.
patent: 4247769 (1981-01-01), Warner
patent: 4466189 (1984-08-01), Tobin

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