Device for detecting a position of an object moving in rotation

Details Device for detecting a position of an object moving in rotation Device for detecting a position of an object moving in rotation

1996-08-23

1998-07-21

Le, Que

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25055932, 341 11, 356375, G01D 534

Patent

active

057838178

ABSTRACT:
In a device for detecting a position of an object (linear or circular strip) moving in rotation or translation relative to a base, an incremental track bearing periodically recurring marks and two index tracks bearing a plurality of index marks are scanned by sensors. These sensors supply analog signals which are complementary to each other. In each case, two complementary signals are combined to form a logical track. By a combining of the logical tracks with each other, a further logical track is formed which contains a serial code which corresponds to the absolute value of the position of the object.

REFERENCES:
patent: 4529964 (1985-07-01), Minami et al.
patent: 5336884 (1994-08-01), Khoshnevisan et al.

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