Traveling Vehicle Block Section Control With Batch Permission Requests
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Solution Overview
Problem
Existing traveling vehicle systems in semiconductor manufacturing factories face hindrances due to unnecessary occupation of blocking sections by vehicles not in immediate use, leading to interference and increased communication loads between vehicles and controllers.
Innovation Solution
A traveling vehicle system where vehicles request occupation permissions collectively for multiple blocking sections through a single communication session, with the controller granting permissions based on predetermined criteria such as traveling direction, speed, and priority, to minimize interference and communication load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traveling vehicle requests occupation permissions for multiple blocking sections individually, then the controller can grant permissions accurately, but the number of communication sessions increases, imposing a load on the controller
Solution Approach 1:
The patent combines multiple occupation permission requests into a single communication session. The traveling vehicle transmits request information including identification information of multiple blocking sections simultaneously, and the controller processes all requests in one interaction, reducing communication overhead while maintaining accurate permission control
Solution Approach 2:
The traveling vehicle proactively requests occupation permissions for multiple blocking sections in advance before actually needing to pass through them. This preliminary action allows the controller to grant permissions ahead of time, reducing the need for repeated communication sessions during the vehicle's journey
2Productivity
If a traveling vehicle is permitted to occupy blocking sections ahead of time, then the vehicle can pass through efficiently, but another traveling vehicle is hindered from passing through the same blocking sections
Solution Approach 1:
The patent implements dynamic permission management where the controller determines which blocking sections to permit based on real-time conditions. The system uses predetermined criteria such as the traveling direction of vehicles and their current positions to dynamically decide permission grants, allowing optimal utilization of blocking sections while preventing conflicts
Solution Approach 2:
The patent applies different permission strategies to different blocking sections based on local conditions. Each blocking section's permission status is determined independently according to the specific traveling directions and positions of vehicles, allowing fine-grained control that optimizes overall system throughput while preventing deadlocks
Data Source
AI summary
A traveling vehicle system includes a plurality of traveling vehicles, a controller that controls the plurality of transport vehicles, a traveling region of the traveling vehicles having a plurality of blocking sections each of which undergoes exclusive control to prohibit another traveling vehicle from moving thereinto. The traveling vehicle makes a request to the controller for occupation permissions regarding a plurality of blocking sections to be occupied by the traveling vehicle and are designated by instructions. The controller then determines, among the plurality of blocking sections for which the traveling vehicle makes a request for occupation permissions, one or more of the blocking sections that are able to allow permissions consecutively from an end thereof to be primarily occupied, based on the traveling direction of the traveling vehicle, and the controller grants the traveling vehicle the permissions for one or more blocking sections determined to allow the permissions.