Radiant energy – Photocells; circuits and apparatus – Housings
Patent
1981-02-17
1982-05-04
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Housings
250202, H01J 502
Patent
active
043284221
ABSTRACT:
A system for determining the position of vehicles in an automated warehouse of the type utilizing transfer vehicles and robot vehicles is disclosed. The position determining system includes a photo-electric sensor flexibly coupled to a robot vehicle, which sensor is responsive to its alignment with a pallet stored in the warehouse. The system further includes a photo-electric reflector retaining bracket mounted adjacent to an aisle in the warehouse, the bracket supporting a number of reflectors arranged in a pattern containing information identifying the aisle. A photo-electric transceiver supported by a mounting bracket is connected to a transfer vehicle and is arranged to provide an output signal related to the pattern of the reflectors when the transceiver is in alignment with the reflectors whereby the transfer vehicle is apprised of its location in the warehouse. The system also includes an activation reflector having a smaller reflective expanse than the pattern forming reflectors, the activation reflector being used to activate the pattern responsive portion of the transceiver. The system further includes a pair of fine alignment photo-electric transceivers which serve to finely align the transfer vehicle by requiring the vehicle to search for a position in which the two fine alignment transceivers are simultaneously aligned with a reflector supported by the retaining bracket.
This abstract is not to be taken either as a complete exposition or as a limitation of the present invention, however, the full nature and extent of the invention being discernible only by reference to and from the entire disclosure.
REFERENCES:
patent: 3563327 (1971-02-01), Mier
patent: 3935922 (1976-02-01), Cooper et al.
patent: 3973685 (1976-08-01), Loomer
Litton Systems Inc.
Nelms David C.
Stern Herbert A.
Westin Edward P.
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