3D Map Update Correction for Sensor Variance
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Solution Overview
Problem
Existing information management systems for self-driving vehicles fail to accurately update three-dimensional map information due to differences in sensor mounting positions and performance between surveying vehicles and vehicles using the maps, leading to potential safety issues during self-driving.
Innovation Solution
An information management device with a difference extractor and determination unit that identifies and corrects differences in measurement conditions between surveying vehicles and vehicles using three-dimensional map information, generating correction information to ensure accurate map updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If three-dimensional map information is updated using data from vehicles with different sensor mounting positions and performance, then map update efficiency is improved, but measurement accuracy deteriorates due to differences in measurement conditions between surveying vehicles and regular vehicles
Solution Approach 1:
The patent applies parameter changes by transforming the measurement data from vehicles with different sensor configurations. The correction information generation unit adjusts the three-dimensional information by calculating offset values based on the differences in sensor mounting positions and performance characteristics. This allows data from regular vehicles to be converted into a standardized format that matches the surveying vehicle's measurement parameters, thereby maintaining measurement accuracy while improving map update efficiency.
2Measurement precision
If correction information is generated for every detected difference, then measurement accuracy is improved, but device complexity increases due to additional processing requirements
Solution Approach 1:
The patent introduces an intermediary mechanism - the correction information generation unit - that acts as a mediator between the difference detection process and the map update process. This unit generates correction information that encapsulates the adjustments needed, serving as an intermediate representation that simplifies the overall system architecture. Instead of directly modifying the complex processing logic throughout the system, the correction information serves as a standardized interface that handles the complexity locally.
3Loss of time
If three-dimensional map information is frequently updated with real-time data, then information freshness is improved, but data reliability deteriorates due to accumulation of measurement errors from various vehicle types
Solution Approach 1:
The patent implements a feedback mechanism where the correction information generation unit continuously refines the three-dimensional map information by comparing detected differences with established measurement standards. The system feeds back the correction information to adjust subsequent measurements, progressively reducing accumulated errors. This feedback loop ensures that frequent updates maintain data reliability by systematically correcting deviations caused by different vehicle measurement conditions.
Data Source
AI summary
An information management device includes a difference extractor and a determination unit. The difference extractor extracts, as difference information, vehicle peripheral three-dimensional information detected by a vehicle and three-dimensional map information. The determination unit determines whether the extracted difference information is a difference inherent to the vehicle.