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Reading station structures

  • US 9,400,971 B1
  • Filed: 12/02/2014
  • Issued: 07/26/2016
  • Est. Priority Date: 12/02/2014
  • Status: Active Grant
First Claim
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1. A computer-implemented method, comprising:

  • instructing an autonomous mobile drive unit to move an inventory holder to a first position relative a radio frequency reading structure, the inventory holder detachably coupled to the autonomous mobile drive unit and including a plurality of inventory items stowed in the inventory holder;

    initiating two or more antennas attached to the radio frequency reading structure, a first antenna of the two or more antennas aligned in a first direction and a second antenna of the two or more antennas aligned in a second direction, the first direction different from the second direction;

    reading, via the two or more antennas, a first radio-frequency identification (RFID) tag associated with a first inventory item when the autonomous mobile drive unit and the inventory holder are located at the first position, the first inventory item stowed in the inventory holder; and

    responsive to reading the first RFID tag, instructing the autonomous mobile drive unit to rotate the inventory holder to a second position relative to the two or more antennas; and

    reading, via the two or more antennas, a second RFID tag associated with a second inventory item when the autonomous mobile drive unit and the inventory holder are located at the second position, the second inventory item stowed in the inventory holder.

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