Manual sensing of wire guidance signal
First Claim
1. A method of indicating the presence and condition of a wire guidance system on an operator controlled materials handling vehicle comprising the steps ofsensing whether the wire guidance system is installed on the vehicle,sensing whether a manual steering mode of vehicle operation or wire guidance mode of vehicle operation has been selected by the operator,sensing whether the wire guidance system detects an active wire,activating an alarm having a first characteristic if the manual steering mode has been selected but no active wire is detected,activating said alarm having a second characteristic if the manual steering mode has been selected and an active wire has been detected.
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Accused Products
Abstract
A wire guidance system for a materials handling vehicle, such as a turret stockpicker, detects an alternating signal carried by a buried wire by means of two sets of four sensors each carried at either end of the vehicle. An alarm, including both audio and visual means, having a first characteristic is generated if the vehicle is equipped with a functioning wire guidance system; an alarm having a second characteristic is generated when an active wire is detected and wire guidance has not been activated.
34 Citations
5 Claims
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1. A method of indicating the presence and condition of a wire guidance system on an operator controlled materials handling vehicle comprising the steps of
sensing whether the wire guidance system is installed on the vehicle, sensing whether a manual steering mode of vehicle operation or wire guidance mode of vehicle operation has been selected by the operator, sensing whether the wire guidance system detects an active wire, activating an alarm having a first characteristic if the manual steering mode has been selected but no active wire is detected, activating said alarm having a second characteristic if the manual steering mode has been selected and an active wire has been detected.
Specification