Vehicle sensor monitoring system

Material or article handling – Plural – static structures for supporting discrete loads and... – Load-underlying members

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340686, 414273, B65G 6502

Patent

active

044115776

ABSTRACT:
In a system for controlling the horizontal and vertical alignment of a materials handling vehicle and for transferring articles to and from storage locations of a warehousing system in which several control sensors are positioned on the materials handling vehicle, a monitoring method and circuit for determing the operational status of the sensors by monitoring their status during a selected portion of a cycle of operation when their output is known. In one embodiment sensor outputs are cross checked against each other during a portion of an operating cycle in which the sensors outputs will be at a predetermined relationship to one another.

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