Absolute digital position encoder with multiple sensors per track
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United States of America Patent
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May 21, 1996
Issued Date -
N/A
app pub date -
Feb 25, 1994
filing date -
Jul 22, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus to convert absolute angular or linear position to digital information utilizes a ternary coding scheme. The code is arranged along a single track. Sensors placed at essentially equal intervals distinguish three states per position. The sensor outputs are converted from ternary to binary data by combinatorial logic. The sensors may be mechanical contacts, optical detectors, magnetic detectors, or capacitive detectors. Such an encoder may be used as a potentiometer, multiposition switch replacement, shaft encoder, or length measurement device.
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