Distance and angle measurements in a wire guided vehicle

Details Distance and angle measurements in a wire guided vehicle Distance and angle measurements in a wire guided vehicle

1989-12-06

1991-11-26

Black, Thomas G.

Boots, shoes, and leggings

180169, 318587, G05D 103

Patent

active

050687913

ABSTRACT:
A wire guidance system for a materials handling vehicle, such as a turret stockpicker, detects an alternating signal carried by a buried wire. Two sets of four sensors each are carried at either end of the vehicle. These sensors define regions, and a procedure is provided to determine in which region the wire is located. The distance and angle of the vehicle is determined by reference to the distance measurements of each sensor set, as calculated by a microcomputer. A self testing circuit is provided to insure proper operation of the sensors and associated circuitry.

REFERENCES:
patent: 4247896 (1987-01-01), Schnaibel
patent: 4253541 (1981-03-01), Iida et al.
patent: 4258813 (1981-03-01), Rubel
patent: 4716530 (1987-12-01), Ogawa et al.
patent: 4817750 (1989-04-01), Ishida et al.
patent: 4908557 (1990-03-01), Sudare et al.

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