Method and system for transporting inventory items
First Claim
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1. A system for navigation, comprising:
- a plurality of fiducial marks arranged in a two-dimensional grid on a floor of a workspace;
a plurality of inventory holders positioned in the two-dimensional grid of the plurality of fiducial marks, wherein a first inventory holder of the plurality of inventory holders comprises a plurality of device openings formed by a plurality of vertical support members; and
a mobile drive unit comprising;
a drive module operable to actuate a plurality of wheels;
a position sensor operable to detect first information associated with a first fiducial mark, the first fiducial mark arranged within the two-dimensional grid of the plurality of fiducial marks;
a control module operable to, in response to detecting the first fiducial mark, cause the drive module to actuate the plurality of wheels such that the mobile drive unit moves from the first fiducial mark through the plurality of device openings of the first inventory holder toward a second fiducial mark within the two-dimensional grid of the plurality of fiducial marks.
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Abstract
A method for transporting inventory items includes moving a mobile drive unit to a first point within a workspace. The first point is a location of an inventory holder. The method further includes docking the mobile drive unit with the inventory holder and moving the mobile drive unit and the inventory holder to a second point within the workspace. The second point is associated with conveyance equipment. The method further includes moving the inventory holder to a third point within the workspace using the conveyance equipment.
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Citations
20 Claims
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1. A system for navigation, comprising:
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a plurality of fiducial marks arranged in a two-dimensional grid on a floor of a workspace; a plurality of inventory holders positioned in the two-dimensional grid of the plurality of fiducial marks, wherein a first inventory holder of the plurality of inventory holders comprises a plurality of device openings formed by a plurality of vertical support members; and a mobile drive unit comprising; a drive module operable to actuate a plurality of wheels; a position sensor operable to detect first information associated with a first fiducial mark, the first fiducial mark arranged within the two-dimensional grid of the plurality of fiducial marks; a control module operable to, in response to detecting the first fiducial mark, cause the drive module to actuate the plurality of wheels such that the mobile drive unit moves from the first fiducial mark through the plurality of device openings of the first inventory holder toward a second fiducial mark within the two-dimensional grid of the plurality of fiducial marks. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus comprising:
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a device housing for a drive module, a position sensor, and an obstacle sensor, wherein; the drive module comprises at least two motorized wheels; the position sensor is operable to detect a first fiducial mark disposed on a floor of a workspace within a two-dimensional grid of fiducial marks; and the obstacle sensor is operable to detect one or more objects located laterally to the device housing; a control module operable to; control operation of the drive module in response to wireless commands received from a remote management module; receive information associated with the first fiducial mark from the position sensor; transmit the information associated with the first fiducial mark to the remote management module; receive one or more of the wireless commands from the remote management module, the one or more wireless commands instructing the control module to actuate the drive module to traverse a path from the first fiducial mark to a second fiducial mark in the two-dimensional grid of the fiducial marks; and in response to a detection, by the obstacle sensor, of an object in the path, cause the device housing to slow or stop its movement toward the second fiducial mark. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method for navigation performed by a mobile drive unit, comprising:
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detecting, using a position sensor of a mobile drive unit, a first fiducial mark within a two-dimensional grid of a plurality of fiducial marks; docking with an inventory holder at the first fiducial mark; in response to detecting the first fiducial mark and docking with the inventory holder, determining, using a control module of the mobile drive unit, to traverse a segment of a path, the segment starting at the first fiducial mark and ending at a second fiducial mark; determining, by the mobile drive unit, to perform a rotation maneuver at the second fiducial mark; stopping, by the mobile drive unit, translational movement at the second fiducial mark; and rotating, by the mobile drive unit, the inventory holder at the second fiducial mark. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification