System and method for inventory management using mobile drive units
First Claim
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1. A method for coordinating mobile drive units, comprising:
- storing, by a memory unit of a management module, information indicative of a first three-dimensional volume reserved by a first mobile drive unit;
receiving, by a wireless interface of the management module, a request from a second mobile drive unit to reserve a second three-dimensional volume corresponding to at least a specified height dimension of the second mobile drive unit;
determining, by a central processing unit of the management module, whether the second three-dimensional volume requested by the second mobile drive unit intersects with the first three-dimensional volume reserved by the first mobile drive unit;
based at least in part on a determination that the requested second three-dimensional volume does not intersect with the first three-dimensional volume reserved by the first mobile drive unit, granting the request from the second mobile drive unit to reserve the second three-dimensional volume, wherein the second mobile drive unit responds to receiving information indicative of the granted request by proceeding into at least a portion of a path represented by the second three-dimensional volume; and
calculating, by the central processing unit of the management module, a path for the second mobile drive unit based on a particular destination, wherein calculating the path includes adjusting a number of three-dimensional volumes based on particular dimensions of the second mobile drive unit, including at least the specified height dimension.
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Abstract
A method for inventory management includes deploying a first mobile drive unit having first dimensions and deploying a second mobile drive unit having second dimensions, the first and second dimensions being different. The first and second mobile drive units are operable to transport inventory items to a plurality of inventory stations in the same workspace.
102 Citations
20 Claims
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1. A method for coordinating mobile drive units, comprising:
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storing, by a memory unit of a management module, information indicative of a first three-dimensional volume reserved by a first mobile drive unit; receiving, by a wireless interface of the management module, a request from a second mobile drive unit to reserve a second three-dimensional volume corresponding to at least a specified height dimension of the second mobile drive unit; determining, by a central processing unit of the management module, whether the second three-dimensional volume requested by the second mobile drive unit intersects with the first three-dimensional volume reserved by the first mobile drive unit; based at least in part on a determination that the requested second three-dimensional volume does not intersect with the first three-dimensional volume reserved by the first mobile drive unit, granting the request from the second mobile drive unit to reserve the second three-dimensional volume, wherein the second mobile drive unit responds to receiving information indicative of the granted request by proceeding into at least a portion of a path represented by the second three-dimensional volume; and calculating, by the central processing unit of the management module, a path for the second mobile drive unit based on a particular destination, wherein calculating the path includes adjusting a number of three-dimensional volumes based on particular dimensions of the second mobile drive unit, including at least the specified height dimension. - View Dependent Claims (2, 3, 4, 5)
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6. An inventory management system, comprising:
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a remote management module operable to communicate with a plurality of mobile drive units; and a mobile drive unit comprising one of the plurality of mobile drive units, the mobile drive unit operable to; receive at least a portion of a path between a first location and a second location within a workspace; access information indicating a three-dimensional volume of space associated with the mobile drive unit; request, via a first wireless message to the remote management module, reservation of at least the portion of the path, the request comprising the information indicating the three-dimensional volume of space associated with the mobile drive unit and including at least a specified height dimension; based at least in part upon receiving a second wireless message from the remote management module indicating a grant of the reservation requested by the first message, proceeding along at least the portion of the path towards the second location; and wherein the remote management module is further operable to calculate the path for the mobile drive unit based on the second location, wherein the path calculation includes adjusting a number of three-dimensional volumes based on particular dimensions of the mobile drive unit, including at least the specified height dimension. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A system comprising:
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a management module; a mobile drive unit operable to request to reserve a volume of space including at least a specified height dimension by transmitting a wireless message to the management module; and wherein the management module is operable to; grant the reservation request from the mobile drive unit by determining whether the volume intersects with any reserved volume segments, wherein the mobile drive unit is further operable to respond to information indicative of the granted reservation request by proceeding into at least a portion of a path corresponding to the volume of space; and calculate a path for the mobile drive unit based on a particular destination, wherein the path calculation includes adjusting a number of three-dimensional volumes based on particular dimensions of the mobile drive unit, including at least the specified height dimension. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification