System for sensing arrival of an automatic guided vehicle at a w

Details System for sensing arrival of an automatic guided vehicle at a w System for sensing arrival of an automatic guided vehicle at a w

1990-11-23

1992-07-07

Kashnikow, Andres

Motor vehicles

With means for controlling operation responsive to...

Having controlling means adapted to interact with stationary...

318587, 340941, 340988, 36442402, 364449, B62D 124

Patent

active

051274868

ABSTRACT:
Apparatus for detecting an automatic guided vehicle's longitudinal position and to enable positioning of the vehicle at a load pickup/delivery terminal or other place. In one arrangement a mat having a passive short-circuited loop of wire embedded in it is positioned on the floor. On the vehicle an oscillator and a transmitting antenna provide a primary magnetic field that excites the loop in the mat, inducing current in the loop. The loop current produces a secondary magnetic field. Magnetic receiving antennas on the vehicle detect the secondary magnetic field that is caused by portions of the loop that cross the longitudinal axis of the vehicle. Onboard electronic apparatus ascertains and can control the longitudinal position of the vehicle relative to the mat. The same on-board apparatus enables the vehicle to detect a directly energized (connected to a power source) guidewire in the floor that lies across the vehicle's path between terminals and at terminals. The vehicle can also navigate between terminals by dead reckoning.

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