Vehicle Localization Verification Using Transponder and GNSS
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Solution Overview
Problem
Existing vehicle localization systems, particularly for autonomous vehicles, struggle to provide high-integrity position determination due to reliance on independent sensors that can fail simultaneously in adverse weather conditions, lacking redundancy to ensure reliable positioning.
Innovation Solution
A vehicle localization system that combines a transponder-based localization system with an independent localization system, such as GNSS, to verify and compare position data, ensuring high-integrity vehicle pose determination by reporting errors if discrepancies exceed a threshold, thereby enhancing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple independent localization systems (e.g., LIDAR, cameras) are used to determine vehicle position, then positioning coverage is improved, but reliability deteriorates because these systems can fail simultaneously in adverse weather conditions
Solution Approach 1:
The patent divides the localization system into distinct functional segments: a primary localization system (e.g., LIDAR-based SLAM) and a secondary verification system (e.g., transponder-based system). Each segment operates independently with different failure modes, allowing the primary system to provide continuous positioning while the secondary system verifies integrity, thus resolving the contradiction between coverage and reliability.
2Reliability
If redundancy is introduced by using two sensors to achieve higher integrity, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges the primary localization system and secondary verification system into a unified localization apparatus where both systems share common components (processor, memory, communication interfaces). This merging approach achieves reliability through functional redundancy while minimizing device complexity by consolidating hardware resources and using a single integrated control unit.
3Measurement precision
If transponder-based localization is used to verify vehicle position, then positioning accuracy is improved, but loss of time occurs due to regular verification requirements
Solution Approach 1:
The patent implements periodic verification where the secondary transponder-based localization system checks the primary system's position estimates at regular intervals rather than continuously. This periodic action maintains positioning accuracy through verification while minimizing time loss by allowing the primary system to operate autonomously between verification cycles.
Data Source
AI summary
A method of verifying a position of a vehicle using a vehicle-mounted device, the method including generating first position data for the vehicle-mounted device responsive to receiving data from a transponder-based localization system, generating second position data for the vehicle-mounted device responsive to receiving data from another localization system; and reporting verified vehicle position data for the vehicle, based on a comparison of the data from the other localization system with the data from the transponder-based localization system for the vehicle-mounted device.