Control system and method for providing position measurement with redundancy for safety checking
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United States of America Patent
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Sep 10, 2013
Grant Date -
Dec 25, 2008
app pub date -
Jun 19, 2008
filing date -
Jun 20, 2007
priority date (Note) -
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Abstract
A control system for use in safety critical human/machine control interfaces is described, more particularly a joystick type control system and particularly a joystick type control system utilizing magnetic positional sensing. The control system provides a control input device having a movable magnet, a pole-piece frame arrangement positioned about the magnet, at least three magnetic flux sensors being positioned in said pole-piece frame arrangement and a monitoring arrangement for monitoring the output signal of each of said at least three sensors.
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