INVENTORY SYSTEM WITH MOBILE DRIVE UNIT AND INVENTORY HOLDER

The disclosure relates in general to an inventory system, and more particularly, to an inventory system that includes a mobile drive unit and an inventory holder. Example embodiments include a mobile drive unit (20) for transporting inventory, comprising: a drive module (120), the drive module (120) operable to position the mobile drive unit (20) underneath an inventory holder (30); and a docking head (110) operable to couple to the inventory holder (30) when the mobile drive unit (20) is positioned beneath the inventory holder (30); wherein the drive module (120) is operable to move the mobile drive unit (20) and, when the inventory holder (30) is coupled to the mobile drive unit (20), move the inventory holder (30); and wherein the mobile drive unit (20) includes a sensor (460) operable to detect completion of at least a portion of docking of the docking head (110) to the inventory holder (30)