Circular Vehicle Routes With Direction-Aware Road Grouping
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Solution Overview
Problem
Existing methods struggle to efficiently generate optimal circular traveling routes for vehicles that need to traverse a list of predetermined roads, considering travel cost criteria and preferred directions, especially for repeated travel and data collection tasks, due to the computational complexity of NP-Problem and limitations in existing heuristic methods.
Innovation Solution
A method involving a route generation device that groups roads based on branch points and preferred directions, calculates intergroup travel costs, and determines a vehicle sequence to generate efficient circular routes that meet travel objectives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If all roads are input as waypoint information to search for optimal routes, then complete route coverage is achieved, but calculation time increases significantly
Solution Approach 1:
The patent divides the complete list of roads into multiple groups based on branch points and preferred traveling directions. Each group represents a segment of the overall route network, allowing the system to process and optimize routes in smaller, manageable units rather than treating all roads as a single large set of waypoints.
2Loss of time
If heuristic methods are used to optimize waypoint sequence, then calculation time is reduced, but optimization quality deteriorates
Solution Approach 1:
The patent applies segmentation by dividing roads into groups based on branch points and preferred directions, then optimizes the sequence of these groups rather than individual waypoints. This reduces the combinatorial complexity while maintaining route quality by preserving the structural relationships within each group.
Solution Approach 2:
The patent changes the optimization parameter from individual waypoint sequences to group sequences. By optimizing at the group level rather than the individual road level, the system reduces computational complexity while maintaining adequate route optimization quality for practical purposes.
3Ease of operation
If conventional waypoint methods are used, then route generation is simple, but preferred traveling directions cannot be considered
Solution Approach 1:
The patent applies local quality by considering preferred traveling directions within each road group based on local road characteristics and branch point configurations. This allows the system to adapt to local directional preferences while maintaining the overall simplicity of the route generation process through group-based processing.
Solution Approach 2:
The patent performs preliminary action by pre-grouping roads based on branch points and preferred traveling directions before route optimization. This preliminary organization enables the system to automatically incorporate directional preferences without adding complexity to the actual route generation step.
4Manufacturing precision
If repeated travel is required for data collection, then data quality improves, but route complexity increases
Solution Approach 1:
The patent uses segmentation to divide the route into groups that can be repeatedly traversed. By organizing roads into logical groups based on branch points and directions, the system can efficiently generate routes that require repeated traversal of specific groups for data collection without manually constructing complex repeated sequences.
Data Source
AI summary
The method of generating a circular traveling route of a vehicle is performed by a route generation device, and the method comprises an operation of receiving a request for generating a circular traveling route including information about the list of roads to be circulated or information about an origin and a destination of the vehicle, an operation of grouping a list of roads to be circulated into a plurality of groups, and an operation of determining a vehicle traveling sequence in the plurality of groups.