Conveyance Device Controller for Mobile Drive Unit Navigation Decoupling
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Solution Overview
Problem
Conventional inventory systems face inefficiencies due to the combined processing of navigational and conveyance instructions for mobile drive units (MDUs), leading to delays and reduced performance in storage and sortation facilities.
Innovation Solution
A conveyance device controller is introduced to independently manage conveyance operations on MDUs, using fiducial markers for navigation and conveyance information, allowing for decoupled control of navigation and conveyance, enabling efficient item handling without impacting the MDU's motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single management system controls both navigation and conveyance operations, then system integration is simplified, but processing delays occur and overall productivity decreases
Solution Approach 1:
The patent divides the previously unified management system into two separate controllers: a navigation controller that handles MDU movement and a conveyance device controller that handles item transfer operations. This segmentation allows each controller to process its specific tasks independently without creating bottlenecks, thereby improving processing speed while maintaining functional separation.
Solution Approach 2:
The conveyance control functionality is extracted from the navigation management system and implemented as a dedicated conveyance device controller. This extraction removes the processing burden from the navigation system, allowing simultaneous independent processing of navigation and conveyance instructions, thus eliminating delays caused by sequential processing.
2Reliability
If conveyance operations are processed through the navigation management system, then centralized control is maintained, but wait times increase due to combined processing requirements
Solution Approach 1:
The conveyance device controller is pre-configured with the authority to process conveyance instructions independently. When an MDU arrives at a transfer location, the conveyance controller can immediately process item transfer commands without waiting for navigation system approval, as the coordination protocols are established in advance through fiducial marker recognition and pre-programmed control logic.
3Ease of operation
If conveyance instructions are handled by the navigation management system, then unified command structure is preserved, but task completion delays occur
Solution Approach 1:
The patent introduces fiducial markers as intermediaries that facilitate communication between the navigation and conveyance systems. These markers encode transfer location information that the conveyance device controller can read and process independently, serving as a mediator that enables coordinated operation without requiring constant navigation system intervention, thus reducing task completion time while maintaining operational unity.
Data Source
AI summary
Systems and methods are provided herein for operating a conveyance system (e.g., a conveyor belt, tilt plane, robotic arm) of a mobile drive unit (MDU) independent of the MDU's navigation system. The MDU may be configured to obtain, convey, and deliver items within the workspace. Navigation information related to navigating the MDU within a workspace may be obtained. Operations of a navigational system of the MDU may be performed to move the MDU to various locations within the workspace in accordance with the navigation information. Conveyance information related to physically obtaining and/or delivering an item within the workspace may be obtained by the MDU (e.g., via conveyance-related fiducial markers and/or sensors of the MDU). At least one operation of a conveyance system of the MDU may be executed which may cause the item to be physically relocated based at least in part on the conveyance information.