Vehicle Lane Centering Route Cost Gradient
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Solution Overview
Problem
Existing vehicle driving assistance systems fail to appropriately set and maintain a travel route that keeps a vehicle centered on its lane due to inadequate consideration of route costs related to lane centering.
Innovation Solution
A vehicle driving assistance system that acquires travel road information, sets multiple travel route candidates, calculates route costs at sampling points, and selects the route with the lowest cost, increasing the cost at sampling points further from the lane center and reducing the cost change rate as proximity to the vehicle increases, prioritizing lane centering in short-distance areas and reducing its influence in long-distance areas where estimation accuracy is degraded.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If route cost is increased at sampling points further from lane center to prioritize lane centering, then lane centering accuracy is improved, but calculation load and system complexity increase
Solution Approach 1:
The patent applies local quality by differentiating route cost calculation based on spatial location. Sampling points closer to the vehicle (short-distance area) receive higher weight for lane centering cost, while sampling points farther away (long-distance area) receive lower weight. This localized differentiation improves lane centering accuracy where it matters most without uniformly increasing complexity across all calculations.
Solution Approach 2:
The patent segments the road ahead into short-distance and long-distance areas relative to the vehicle position. This segmentation allows the system to apply different route cost calculation strategies to different segments, reducing overall computational complexity while maintaining lane centering accuracy in the critical short-distance region.
2Reliability
If route cost calculation considers all sampling points equally, then comprehensive route evaluation is achieved, but lane centering control effectiveness is reduced
Solution Approach 1:
The patent changes the parameter of route cost weight based on the sampling point's distance from the vehicle. By dynamically adjusting the weight parameter according to position, the system achieves both comprehensive evaluation (all points are considered) and precise lane centering control (higher weight given to critical near-field points).
3Ease of operation
If route cost gradient is uniformly applied across all distances, then calculation simplicity is maintained, but lane centering accuracy in short-distance area is compromised
Solution Approach 1:
The patent introduces dynamics by making the route cost gradient variable rather than fixed. The gradient changes based on the sampling point's distance from the vehicle, allowing the system to optimize lane centering accuracy in the short-distance area while maintaining reasonable calculation complexity through the structured variable approach.
Data Source
AI summary
A system, method and computer program product provide vehicle driving assistance, wherein candidate travel routes for the vehicle are analyzed to identify one of the travel routes as a selected travel route. The selection includes calculating a route cost associated with directing the vehicle to ride over a center of a travel lane, for each of the candidate routes and selecting the one with the lowest cost.