Automated warehouse vehicle position determining system

• US 4,328,422 A
• Filed: 02/17/1981
• Issued: 05/04/1982
• Est. Priority Date: 03/27/1978
• Status: Expired due to Term

• Current Assignee: HK Systems Incorporated (KION GROUP AG)
• Original Assignee: Litton Systems Incorporated
• Inventors: Loomer, Weston R.
• Primary Examiner(s): Nelms, David C.
• Assistant Examiner(s): Westin, Edward P.
• Application Number:
  US06/235,211
• Time in Patent Office: 441 Days
• Field of Search: 250/202, 250/239, 180/167, 180/168, 180/169, 414/274, 414/279, 414/284
• US Class Current: 250/239
• CPC Class Codes: B65G 1/065 with self propelled cars

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.

Claims

1. A vehicle position determining system comprising:

a vehicle arranged for movement along a path in a warehouse in which articles are stored;

sensor means coupled to said vehicle and arranged to respond to the alignment of said sensor means with a preselected one of said stored articles;

means flexibly coupling said sensor means to said vehicle; and

support means fixedly connected to said vehicle and supporting said flexible coupling means,

wherein said coupling means is movable relative to said support means thereby permitting the distance between said sensor means and said vehicle to be selectively varied.

2. A vehicle position determining system according to claim 1 wherein at least a portion of said flexible coupling means is composed of a plastic.

3. A vehicle position determining system according to claim 2 wherein said portion of said flexible plastic coupling means is composed of urethane.

4. A vehicle position determining system according to claim 1 wherein at least a portion of said flexible coupling means has a tubular cross-section.

5. A vehicle position determining system according to claim 1 wherein a portion of said coupling means is adapted to retain said sensor means.

6. A vehicle position determining system according to claim 5 wherein said portion is composed of a metal.

7. A vehicle position determining system according to claim 5 wherein said portion is composed of a plastic.

8. A vehicle position determining system according to claim 1 wherein said sensor means is coupled to said vehicle so as to be positioned forward of the leading edge thereof.