Vehicle Track Planning Using Risk Maps for Road Surface Obstacles
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle control systems fail to generate a natural target track based on the degree of traveling risk due to road surface obstacles, leading to potential deterioration in ride comfort and safety.
Innovation Solution
An electronic control device that acquires environmental information, generates risk maps representing the degree of traveling risk, and determines a traveling track based on these risk maps, distinguishing between obstacles and road surface obstacles to prioritize risk avoidance accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle uniformly avoids all obstacles around the vehicle as a vehicle body, then the obstacle avoidance capability is improved, but the ride comfort and naturalness of traveling are deteriorated
Solution Approach 1:
The patent segments obstacles into two categories: obstacles that the vehicle body should avoid and road surface obstacles that the wheels should avoid. This segmentation allows different avoidance strategies to be applied to each category, improving both safety and ride comfort by preventing the vehicle from meandering unnecessarily while still avoiding actual hazards.
Solution Approach 2:
The patent applies different quality standards to different types of obstacles. For road surface obstacles, the evaluation focuses on wheel track intersection rather than vehicle body clearance, allowing the vehicle to travel more naturally over minor road imperfections while maintaining safety by avoiding significant hazards.
2Reliability
If the vehicle meanders to avoid obstacles as a vehicle body, then the safety is improved, but the naturalness of traveling and ride comfort are deteriorated
Solution Approach 1:
The patent divides the avoidance evaluation into two distinct assessments: one for vehicle body clearance from obstacles and another for wheel track intersection with road surface obstacles. This allows the vehicle to maintain safety by avoiding true hazards while traveling naturally over minor road surface irregularities.
Solution Approach 2:
Instead of evaluating all obstacles uniformly from the perspective of vehicle body clearance, the patent inverts the evaluation approach for road surface obstacles by assessing wheel track intersection. This inversion allows the vehicle to prioritize natural traveling paths while maintaining safety through targeted avoidance of actual hazards.
3Device complexity
If the vehicle handles all obstacles uniformly without distinguishing road surface obstacles, then the control simplicity is maintained, but the ability to generate natural target tracks is deteriorated
Solution Approach 1:
The patent segments obstacle information processing into two streams: one for general obstacles affecting vehicle body clearance and another for road surface obstacles affecting wheel track. This segmentation enables the generation of natural target tracks by applying appropriate evaluation criteria to each obstacle type while maintaining manageable system complexity.
Solution Approach 2:
The patent applies different quality evaluation criteria to different obstacle types: vehicle body clearance for general obstacles and wheel track intersection for road surface obstacles. This local differentiation enables the system to generate natural, context-appropriate target tracks without requiring overly complex control mechanisms.
Data Source
AI summary
An electronic control device mounted on a vehicle includes: an information acquisition unit that acquires information regarding an environmental element around the vehicle, the environmental element including at least a road surface obstacle that is passable by the vehicle on a road surface; a risk map generation unit that generates a risk map representing a degree of traveling risk of the vehicle at each position around the vehicle based on the information; and a traveling control planning unit that determines a traveling track for traveling control for the vehicle based on the risk map, in which the traveling control planning unit determines the traveling track based on the degree of traveling risk due to the road surface obstacle on the risk map through which a wheel track of the vehicle in the traveling track passes.