Management Control Device for Autonomous Dump Truck Overtaking
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Solution Overview
Problem
The existing autonomous travel system using block control methods for unmanned dump trucks in mines faces increased wireless communication load and prolonged traveling time intervals, especially during overtaking, which affects mine production efficiency.
Innovation Solution
A management control device that minimizes wireless communication load by optimizing the overtaking path and travel permission sections, allowing dump trucks to change lanes efficiently and reduce the travel permission section length for the overtaking vehicle, thereby reducing the impact on the opposite lane's traveling time interval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the overtaking technology from Patent Document 1 is applied to determine the shortest overtaking path, then the overtaking distance is minimized, but the wireless communication load increases due to the need for frequent position grasping
Solution Approach 1:
The patent divides the travel permission section into multiple sections (first travel permission section and second travel permission section) with different communication frequency requirements. The first section uses low communication frequency while the second section uses high communication frequency, allowing the system to balance communication load with position monitoring needs during overtaking.
Solution Approach 2:
The patent dynamically adjusts the communication frequency based on the vehicle's position and overtaking state. The control device switches between different communication frequencies (low and high) depending on whether the vehicle is in the first or second travel permission section, optimizing the balance between position monitoring accuracy and communication load.
2Loss of time
If the travel permission section length is not reduced for overtaking vehicles, then the opposite lane vehicle must wait longer, but reducing the section length may compromise safety
Solution Approach 1:
The patent dynamically adjusts the travel permission section length based on the overtaking vehicle's speed and position. The control device shortens the second travel permission section when the overtaking vehicle travels at a speed higher than a predetermined value, thereby reducing the waiting time for opposite lane vehicles while maintaining safety through speed-based control.
Solution Approach 2:
The control device continuously monitors the overtaking vehicle's speed and position, and adjusts the travel permission section length in real-time based on this feedback. When the vehicle exceeds the predetermined speed threshold, the system automatically reduces the section length, creating a feedback loop that balances safety and efficiency.
3Quantity of substance
If block control method is used to reduce wireless communication frequency, then communication load is reduced, but the ability to perform flexible control between vehicles is limited
Solution Approach 1:
The patent segments the travel permission section into multiple sections with different control strategies. The first section uses block control with low communication frequency, while the second section allows for more flexible control with higher communication frequency, enabling the system to maintain both communication efficiency and control adaptability.
Solution Approach 2:
The patent implements dynamic control by adjusting communication frequency and control flexibility based on the vehicle's position and state. The system transitions from rigid block control to more flexible control as needed, maintaining adaptability while minimizing overall communication load through position-based dynamic adjustment.
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
In performing overtaking of a vehicle using an opposite lane presupposing block control, to cut down a load on wireless communication and to further reduce an influence affecting a traveling time interval of the vehicle in the opposite lane. A first travel permission section 108 in which only an own vehicle 20-1 is permitted to travel and a second travel permission section 81-2 in which only another vehicle 20-2 in a stop state located ahead of the own vehicle 20-1 on a traveling lane thereof is permitted to travel are set. An overtaking path by which the own vehicle 20-1 overtakes the other vehicle 20-2 is generated to include a first transition section 105 for the own vehicle to change lanes from a traveling lane of the own vehicle to an opposite lane, an overtaking section 100 that connects to a node of a front end of the first transition path 105 and is comprised of a link provided on the opposite lane, and a second transition section 106 that connects to a node of a front end of the overtaking section 100 and is for the own vehicle to return to the traveling lane from the overtaking section 100. At that time, a section length of the second travel permission section 81-2 being set in advance is shortened.