Limited Section Controller for Autonomous Vehicle Junction Flow
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Solution Overview
Problem
In autonomous distributed automatic traveling vehicle systems, the limitation on the number of vehicles entering a junction simultaneously reduces the passing flow and traveling efficiency due to collision avoidance measures.
Innovation Solution
An automatic traveling vehicle system with a limited section controller that manages vehicle passage by updating traffic information, determining passage possibilities, setting standby positions, and restarting traveling vehicles in specific directions to maximize the number of vehicles passing through a limited section per unit time, while avoiding collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of vehicles permitted to enter the junction at a time is limited to avoid collision, then safety is improved, but the passing flow and traveling efficiency deteriorate
Solution Approach 1:
The system performs preliminary actions by setting standby positions for vehicles before they reach the limited section. The limited section controller determines appropriate standby positions based on vehicle delay conditions and instructs vehicles to stop at these positions in advance, allowing for coordinated release that maximizes passing flow while maintaining safety
Solution Approach 2:
The system dynamically adjusts the number of vehicles permitted to enter the limited section and their standby positions based on real-time delay conditions. The controller monitors vehicle delays and modifies passage permissions and standby position assignments adaptively, transforming a static limitation into a dynamic control system that optimizes both safety and efficiency
2Reliability
If the number of vehicles permitted to enter the junction at a time is limited to avoid collision, then safety is improved, but the traveling efficiency deteriorates
Solution Approach 1:
The system performs preliminary actions by setting standby positions for vehicles before they reach the limited section. The limited section controller determines appropriate standby positions based on vehicle delay conditions and instructs vehicles to stop at these positions in advance, allowing for coordinated release that maximizes passing flow while maintaining safety
Solution Approach 2:
The system continuously monitors vehicle delay conditions near the junction and uses this feedback to adjust passage permissions and standby position assignments. The limited section controller updates traffic information based on actual vehicle delays and modifies control decisions accordingly, creating a closed-loop system that minimizes time loss while ensuring safety
Data Source
AI summary
According to one embodiment, a limited section controller includes a traffic information update unit, a determination unit, a standby position setting unit, and a traveling restart setting unit. The traffic information update unit updates delay information of the traveling vehicle near the junction. The determination unit determines whether to permit the traveling vehicle to pass based on whether there is the traveling vehicle in the limited section. The standby position setting unit sets a standby position of each of the traveling vehicles of a limited number or less present in a standby section. The traveling restart setting unit determines an approach direction into the limited section.