Road Zone Assessment Device for Navigation Route Branching
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Solution Overview
Problem
Existing navigation systems often incorrectly associate road zones with navigation routes at branching locations, leading to potential self-driving errors by including routes that are not part of the intended navigation route.
Innovation Solution
A road zone assessment device that selects a first road zone associated with a vehicle navigation route, determines if the navigation route extends to a connected second road zone, and releases association with other road zones when the selected zone is connected and the route extends to the second zone, preventing incorrect route associations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If road zones are associated with navigation route by counting road zone branches equal to road link branches, then association completeness is improved, but incorrect associations occur at branching locations
Solution Approach 1:
The system performs feedback verification by checking whether the navigation route actually extends from the selected first road zone to the connected second road zone. This feedback mechanism identifies and releases incorrectly associated road zones, resolving the contradiction between comprehensive association and association accuracy.
Solution Approach 2:
The system performs preliminary association of road zones with navigation routes based on branching structure matching, then subsequently verifies and releases incorrect associations. This preliminary action followed by verification approach improves efficiency while maintaining accuracy.
2Area of stationary object
If all road zones connected to navigation route nodes are associated, then route coverage is improved, but self-driving errors increase due to incorrect route associations
Solution Approach 1:
The system uses feedback verification to determine whether the navigation route actually extends from the selected first road zone to the connected second road zone. Incorrectly associated road zones are identified and released, ensuring that only valid route segments remain associated, thus maintaining route coverage while preventing self-driving errors.
Solution Approach 2:
The system extracts and removes incorrectly associated road zones from the navigation route association. By taking out the harmful element (incorrect associations) while preserving correct ones, the system maintains comprehensive route coverage without compromising self-driving reliability.
3Measurement precision
If node locations on navigation map match road zone connection locations, then association precision is improved, but location estimation flexibility is reduced
Solution Approach 1:
The system performs preliminary association based on topological structure (branching relationships) rather than requiring precise location matching. This preliminary approach allows flexible location estimation while maintaining association accuracy through subsequent verification steps.
Solution Approach 2:
The system changes the association criterion from strict location matching to topological structure matching (counting road zone branches equal to road link branches). This parameter change improves adaptability for location estimation while maintaining association precision through feedback verification.
Data Source
AI summary
A road zone assessment device has a processor configured to select a first road zone from among multiple first road zones representing a first road associated with a vehicle navigation route, and connected with a second road zone representing a second road different from the first road, on a location-estimating map used for a vehicle, to determine whether or not the navigation route extends from the selected first road zone to the second road zone, to identify other first road zone associated with the navigation route from the selected first road zone forward on the destination location side of the navigation route, and to release association between the other first road zone and the navigation route when the selected first road zone is connected with the second road zone and the navigation route extends from the selected first road zone to the second road zone.