Vehicle sensor monitoring system
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United States of America Patent
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-
Oct 25, 1983
Issued Date -
N/A
app pub date -
Mar 3, 1981
filing date -
Mar 7, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
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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