Reading station structures

摘要

In some examples, a reader system is provided for managing inventory items in an inventory system. The reader system may be configured to read tags associated with items stowed in an inventory holder. The inventory holder may be detachably coupled to a mobile drive unit. The mobile drive unit may move the inventory holder to a first position near an antenna of the reader system and the tags may begin to be read. While reading or at other times in the reading process, the mobile drive unit may move the inventory holder relative to the antenna. The identified tags may be compared to a manifest list of items expected to be stowed in the inventory holder.

主权项

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.