Apparatus and method for detecting a reversion of direction...

Details Apparatus and method for detecting a reversion of direction... Apparatus and method for detecting a reversion of direction...

2008-01-18

2010-12-21

Kundu, Sujoy K (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system

Speed

C702S142000, C702S145000, C702S148000, C702S149000

Reexamination Certificate

active

07856338

ABSTRACT:
An apparatus for detecting a reversion of direction of a relative movement between a periodic scale for defining a periodic field and a field sensor. The field sensor outputs first and second sensor signals. The first sensor signal is advanced from the second sensor signal if the periodic field moves in a first direction. The second sensor signal is advanced from the first sensor signal if the periodic field moves in a second direction. A determiner determines the difference between the first sensor signal and a signal corresponding to a temporal change of the second sensor signal or between the second sensor signal and a signal corresponding to a temporal change of the first sensor signal.

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