Map Update Device Reliability Threshold Control
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Solution Overview
Problem
Existing map update methods may not properly update reference maps when the reliability of the integrated map is not sufficiently high, leading to a potential decrease in the precision of the reference map.
Innovation Solution
A map update device that generates an integrated map from multiple input maps, each with a reliability score, and updates the reference map only when the integrated map's reliability meets a predetermined threshold, while storing less reliable integrated maps for future updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the reference map is updated by reflecting differences from an integrated map with insufficient reliability, then the update process can proceed frequently, but the precision of the reference map decreases
Solution Approach 1:
The patent introduces a reliability parameter for the integrated map and uses it as a conditional threshold to control the update process. When reliability meets or exceeds the threshold, updates proceed; when below, updates are postponed. This parameter-based control resolves the contradiction by dynamically adjusting update behavior based on data quality.
Solution Approach 2:
The system performs preliminary reliability assessment of the integrated map before executing the update operation. This preliminary check ensures that only sufficiently reliable data triggers reference map updates, preventing precision degradation while maintaining update frequency when conditions are favorable.
2Manufacturing precision
If the reliability threshold for updating the reference map is increased, then the precision of the reference map is maintained, but the frequency of updates decreases
Solution Approach 1:
The update system transitions from a static, fixed-threshold approach to a dynamic, condition-based approach. The reliability threshold is not arbitrarily set but dynamically evaluated based on the actual quality metrics of the integrated map data, allowing the system to adapt update frequency to data quality conditions.
Solution Approach 2:
The system incorporates feedback from reliability assessment results to control the update process. The reliability metric serves as feedback that informs whether conditions are favorable for updating, creating a closed-loop control mechanism that balances precision maintenance with update frequency.
3Quantity of substance
If differences are reflected from integrated maps with varying reliability levels, then more data can be utilized for updates, but the quality control of the reference map deteriorates
Solution Approach 1:
The patent applies different quality standards to different data sources based on their reliability characteristics. High-reliability integrated maps undergo full update processing, while lower-reliability maps trigger accumulation and re-evaluation. This local quality differentiation allows maximum data utilization while maintaining rigorous quality control for each data batch.
Solution Approach 2:
The update process is segmented into distinct pathways based on reliability assessment: high-reliability updates proceed immediately, while lower-reliability data enters an accumulation queue for future processing. This segmentation enables the system to handle diverse data quality levels without compromising overall reference map quality.
Data Source
AI summary
A map update device is configured to: generate an integrated map based on a plurality of input maps, each of the plurality of input maps including a probe data element assigned with a reliability; determine a reliability of the generated integrated map; update a reference map by reflecting a difference between the reference map and the integrated map when the determined reliability of the integrated map is equal to or higher than a first predetermined level; store, as one of accumulated data elements, the integrated map when the determined reliability of the integrated map is lower than the first predetermined level and equal to or higher than a second predetermined level, the second predetermined level being set to be lower than the first predetermined level; update the integrated map based on the accumulated data elements; and determine the reliability of the updated integrated map.