Area Controller Dispatch for Cross-Zone Conveyance Bottlenecks
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Solution Overview
Problem
In conventional transport vehicle systems, conveyance instructions for special sections require inefficient handling due to area boundaries, leading to increased handling time and reduced efficiency as empty vehicles pass by special placement units without being controlled for loading.
Innovation Solution
The system optimizes conveyance by having area controllers detect and utilize empty transport vehicles within their jurisdiction to execute conveyance instructions directly, rather than relying on vehicles from adjacent areas, thereby reducing unnecessary movement and enhancing handling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conveyance instructions for special sections are handled by area controllers of adjacent jurisdictions, then conveyance can be executed, but handling time increases and efficiency decreases
Solution Approach 1:
The area controller proactively transmits movement instructions to adjacent area controllers to send empty transport vehicles toward the first jurisdiction area before conveyance instructions are needed. This preliminary positioning of vehicles eliminates waiting time when conveyance requests arise, allowing immediate execution by the first area controller rather than relying on vehicles from other jurisdictions.
Solution Approach 2:
The system divides jurisdiction areas and assigns specific placement units (including special sections) to particular area controllers. The first area controller maintains authority over special sections within its jurisdiction even when vehicles must traverse from other areas. This segmentation allows the first area controller to directly manage conveyance operations for its special sections, reducing coordination overhead and improving response time.
2Device complexity
If area controllers only control vehicles within their own jurisdiction, then control is simplified, but vehicles cannot execute conveyance for special sections in other jurisdictions
Solution Approach 1:
Area controllers are designed with multi-functional capabilities: they control vehicles within their own jurisdiction and also transmit movement instructions to adjacent area controllers for vehicles needed in their jurisdiction. The first area controller can both receive conveyance instructions for its special sections and manage the arrival and execution by vehicles from other jurisdictions, making it a universal control node that handles both local and external conveyance needs.
Solution Approach 2:
The first area controller acts as an intermediary between the host controller and vehicles from other jurisdictions. It receives conveyance instructions from the host controller for special sections, then coordinates with adjacent area controllers to bring appropriate vehicles to the jurisdiction boundary. This intermediary role simplifies the overall control architecture by localizing the coordination function rather than requiring direct host controller management of all cross-jurisdictional operations.
Data Source
AI summary
A transport vehicle system includes a track, transport vehicles, placement units to deliver or receive articles, and area controllers that each receive a conveyance instruction from a host controller and control a transport vehicle in a jurisdiction area to execute various instructions. The area controller, in response to receiving from the host controller a conveyance instruction destined for one special placement unit belonging to a jurisdiction area, transmits to another area controller a movement instruction to control an empty transport vehicle to move toward the jurisdiction area, and also controls an empty transport vehicle that has become available in the jurisdiction area after transmission of the movement instruction to execute the conveyance instruction.