Apparatus and methods for monitoring encoder signals

Details Apparatus and methods for monitoring encoder signals Apparatus and methods for monitoring encoder signals

2005-05-24

2005-05-24

Tu, Christine T. (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Data pulse evaluation/bit decision

C714S819000, C369S053350

Reexamination Certificate

active

06898744

ABSTRACT:
Methods for monitoring the accuracy of positional measurements by encoders that translate positional information into signals include determining the difference between two signals generated by the encoder and comparing the difference to a threshold value. Differences greater than the threshold indicate an error in measurement by the encoders. The methods may be practiced using one or more computer programs. The methods may be practiced with any encoder, including absolute and incremental encoders. Encoders include components to implement the methods.

REFERENCES:
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patent: 5136883 (1992-08-01), Jannotta
patent: 5705733 (1998-01-01), Jannotta
patent: 5973629 (1999-10-01), Fujii
patent: 6480550 (2002-11-01), Zimmermann

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