Automated Valet Parking Speed Coordination for Safe Vehicle Spacing
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Solution Overview
Problem
In automated valet parking systems, the inter-vehicle distance between autonomous driving vehicles can become too close due to differences in acceleration performance, deceleration performance, or accuracy of vehicle speed control, leading to potential safety issues and inefficiencies.
Innovation Solution
An automated valet parking system that includes a vehicle information acquisition unit, a condition determination unit, and an inter-vehicle communication traveling instruction unit, which acquires positional information of autonomous driving vehicles, determines if they satisfy preset inter-vehicle communication traveling conditions, and instructs them to perform inter-vehicle communication traveling to adjust vehicle speeds and maintain appropriate distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the same target vehicle speed is instructed to multiple autonomous driving vehicles, then the automated valet parking operation efficiency is improved, but the inter-vehicle distance becomes too close due to differences in acceleration performance, deceleration performance, or accuracy of vehicle speed control
Solution Approach 1:
The system establishes inter-vehicle communication to enable real-time feedback between autonomous driving vehicles. Each vehicle shares its actual speed, position, and performance characteristics with other vehicles in the parking lot. This feedback mechanism allows the control unit to dynamically adjust target speeds for individual vehicles based on their actual performance, preventing too-close proximity while maintaining overall operational efficiency.
Solution Approach 2:
The system changes the vehicle speed parameter dynamically based on individual vehicle performance characteristics. Instead of using a fixed target speed for all vehicles, the control unit adjusts the target vehicle speed parameter for each autonomous driving vehicle according to its acceleration performance, deceleration performance, and speed control accuracy. This parameter adaptation resolves the contradiction by allowing efficient operation while maintaining safe distances.
2Reliability
If inter-vehicle communication traveling is implemented to maintain appropriate distances, then the safety and reliability are improved, but the system complexity and control requirements increase
Solution Approach 1:
The inter-vehicle communication system is designed to serve multiple functions simultaneously: it monitors vehicle positions, exchanges speed information, coordinates target speed adjustments, and maintains safety distances. By making the communication system multi-functional, the patent reduces overall system complexity rather than adding separate systems for each function.
Solution Approach 2:
Each autonomous driving vehicle is equipped with the capability to autonomously adjust its speed based on information received from other vehicles through inter-vehicle communication. The vehicles self-regulate their own motion without requiring constant external control commands, reducing the complexity of centralized control while maintaining reliable distance maintenance.
Data Source
AI summary
The system includes a vehicle information acquisition unit that acquires positional information of target vehicles including the autonomous driving vehicle and a communicative vehicle which is not capable of performing autonomous driving and is capable of performing inter-vehicle communication in the parking place, a condition determination unit that determines whether or not the target vehicles satisfy an inter-vehicle communication traveling condition, and an inter-vehicle communication traveling instruction unit that causes the target vehicles determined to satisfy the inter-vehicle communication traveling condition by the condition determination unit to perform inter-vehicle communication traveling by inter-vehicle communication. In the inter-vehicle communication traveling, the autonomous driving vehicle is caused to preferentially perform vehicle speed adjustment for vehicle approach suppression by the inter-vehicle communication over the target vehicle speed for the automated valet parking.