Semiconductor Transport Control for Dynamic OHT-AGV Routing
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Solution Overview
Problem
Conventional control systems for semiconductor manufacturing plants are limited in their ability to integrate and control multiple types of transport means, such as OHT and AGV, leading to inefficiencies in path optimization and task assignment, especially when congestion or failures occur, resulting in increased transport times and reduced productivity.
Innovation Solution
A transport control device that dynamically assigns and integrates the use of different types of transport devices, such as OHT and AGV, to optimize path selection and resource allocation based on moving distance, time, and idleness, allowing for real-time adjustments to minimize transport costs and avoid congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional control system controls only one type of transport means separately, then the control system is simple and easy to operate, but the adaptability to handle multiple transport means and optimize path selection is poor
Solution Approach 1:
The patent implements a unified transport control system that can control multiple types of transport means (OHT and AGV) through a common interface and control logic. The control system is designed to universally manage different transport devices, assigning tasks dynamically based on current conditions rather than requiring separate dedicated control systems for each transport type.
2Productivity
If the control system periodically searches for optimal path for each transport means separately, then the control logic is simple, but the productivity is reduced due to inability to perform real-time dynamic reassignment when congestion occurs
Solution Approach 1:
The patent implements dynamic path search and task reassignment mechanisms that continuously monitor transport conditions and adjust paths in real-time. When congestion is detected on a transport path, the system dynamically recalculates alternative routes and reassigns tasks to different transport means, rather than following fixed periodic search patterns.
Solution Approach 2:
The control system incorporates feedback mechanisms that monitor the actual state of transport paths and vehicles, using this information to dynamically adjust path selection and task assignment. The system receives status information from transport means and uses this feedback to make real-time decisions about optimal routing and resource allocation.
3Loss of time
If a transport means waits on rail when congestion occurs, then the system maintains simplicity by not switching transport means, but the loss of time increases due to waiting
Solution Approach 1:
The control system performs preliminary assessment of alternative paths and available transport means before congestion fully develops. When potential congestion is detected, the system proactively identifies alternative routes and prepares reassignment plans, executing the switch before the transport means encounters significant delays.
Data Source
AI summary
Provided is a transport control device for integrating and controlling different types of transport means and a logistics transport system including the same. The logistics transport system comprises a plurality of first transport devices disposed in a semiconductor manufacturing plant and for transporting a transported object; a plurality of second transport devices different in type from the plurality of first transport devices; and a transport control device for controlling the plurality of first transport devices and the plurality of second transport devices, wherein the transport control device integrates and operates different types of transport devices to transport the transported object.