Coded data generation or conversion – Digital pattern reading type converter – Having combined coding pattern
Patent
1997-01-29
1998-05-12
Hoff, Marc S.
Coded data generation or conversion
Digital pattern reading type converter
Having combined coding pattern
341 16, H03M 122
Patent
active
057512302
ABSTRACT:
An absolute position encoder converts absolute mechanical position to a digital output value. A single-track, rotary embodiment of the encoder includes several conductive pick-up segments that are symmetrically arranged along a circular pick-up track, with each pick-up segment connected to a respective output terminal. A metallic rotor of the encoder comprises a plurality of contacts that are positioned in alignment with the pick-up track such that the contacts slidably contact different pick-up segments as the rotor is rotated. The contacts on the rotor are conductively interconnected, and are maintained at a common voltage via a sliding connection between the rotor and a collector ring. The output of the encoder is a cyclical Gray code sequence, which may be used in combination with a ROM look-up table to accurately track position. Linear and multi-track embodiments are also disclosed.
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Bourns Inc.
Hoff Marc S.
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