Landmark Position Accuracy Evaluation for Vehicle Self-Localization
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Solution Overview
Problem
Existing methods for updating digital maps used in vehicle self-localization do not adequately assess the accuracy of landmark positions, leading to potential inaccuracies that can affect long-term operation and automatic driving functions.
Innovation Solution
A method and electronic evaluation system that assess the accuracy of landmark positions by calculating the global position of selected landmarks without considering their existing global position, using relative and global positions of other landmarks, and determining position deviations to evaluate the accuracy of the position determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If digital maps are updated based on landmark hypotheses from vehicle measurements, then the digital maps can be kept up to date, but measurement errors and other sources of error can lead to inaccurate updates that are detrimental to long-term operation
Solution Approach 1:
The patent applies preliminary action by performing an evaluation of landmark position accuracy before actually updating the digital map. The system calculates expected landmark positions based on the current digital map and vehicle position, compares these with measured positions, and only updates the map if the deviation is within acceptable tolerances. This preliminary verification step prevents erroneous updates from propagating into the long-term digital map data.
Solution Approach 2:
The patent implements feedback by creating a closed-loop verification process where the system continuously monitors landmark position accuracy by comparing measured positions with expected positions derived from the digital map and vehicle localization. This feedback mechanism allows the system to detect and correct measurement errors before they compromise the integrity of the digital map for long-term operation.
2Reliability
If landmark positions are updated without verification, then the digital map can be maintained with current data, but inaccurate positions can compromise vehicle self-localization
Solution Approach 1:
The patent applies self-service by enabling the evaluation system to perform self-verification of landmark positions using data already available from vehicle sensors and the existing digital map. The system uses its own localization capabilities and sensor measurements to validate landmark positions without requiring external verification systems, thereby maintaining reliability while limiting the increase in complexity to essential verification functions only.
3Measurement precision
If the global position of a landmark is calculated without considering its existing global position on the map, then the accuracy of position determination can be assessed, but additional computational steps are required
Solution Approach 1:
The patent applies partial action by performing the complete global position calculation only for selected landmarks that require verification, rather than recalculating positions for all landmarks in the digital map. The system selectively evaluates landmarks based on measurement deviations, thereby achieving accurate position assessment while minimizing the additional computational complexity to only what is necessary for verification purposes.
Data Source
Figure 1~2
AI summary
One aspect of the invention relates to a method for assessing the accuracy of a position determination of a landmark (A, B, G, S, V) in the environment (3) of a vehicle (1), in which a landmark (A, B, G, S, V) selected from a global map (7) is removed, the global position of this selected landmark (A, B, G, S, V) is compared with the calculated global position of this landmark (A, B, G, S, V) depending on the positions of other landmarks that were acquired during the acquisition process and/or acquired during an acquisition process, and a position deviation between the global position and the calculated position is determined, wherein the position deviation is taken into account for assessing the accuracy of the position determination of the landmark (A, B, G, S, V). One aspect relates to an electronic evaluation system (6).