Autonomous Vehicle Positioning via Roadside Correction
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Solution Overview
Problem
Current autonomous vehicle navigation systems face challenges in achieving high precision positioning due to limitations in GPS satellite navigation, particularly on varied road shapes and forms, necessitating enhanced position correction and lane verification.
Innovation Solution
An autonomous vehicle assistance device that receives satellite navigation information and correction data, calculates position error vectors, and uses vision detection to correct vehicle positioning, incorporating a communicator, vehicle position determiner, stop detector, and vision detector to enhance precision and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS satellite navigation is used for vehicle positioning, then the system can provide basic navigation coverage, but the position precision is limited to around 10 meters
Solution Approach 1:
The patent introduces fixed bodies (such as roadside equipment) as intermediaries between satellites and vehicles. These fixed bodies receive satellite signals, process them, and transmit corrected position information to vehicles, thereby improving positioning precision without requiring vehicles to directly process complex satellite data
Solution Approach 2:
The patent replaces pure satellite-based positioning with a hybrid system that incorporates ground-based fixed bodies. This substitution allows the use of pre-calculated position information from fixed bodies to correct satellite positioning errors, achieving centimeter-level precision without the complexity of full carrier-phase differential GPS
2Measurement precision
If satellite navigation carrier is used to achieve enhanced position precision, then position information with tens of centimeter precision can be acquired, but the system complexity increases and requires further verification on varied road shapes
Solution Approach 1:
The patent performs preliminary position correction by fixed bodies before vehicle arrival. Fixed bodies pre-calculate position corrections based on satellite signals and store this information, so when vehicles pass by, they can directly use the pre-prepared correction data without performing complex real-time calculations
Solution Approach 2:
The patent implements feedback mechanisms where fixed bodies continuously monitor satellite signal quality and adjust position corrections accordingly. The system compares expected position with actual vehicle position and refines corrections to maintain precision on varied road geometries
3Measurement precision
If position correction is performed using fixed bodies, then position precision can be enhanced, but the system requires additional infrastructure and communication components
Solution Approach 1:
The patent designs fixed bodies with multiple functions: they serve as satellite signal receivers, position calculation units, communication transmitters, and verification nodes. This multi-functionality reduces the need for separate dedicated equipment for each function, thereby limiting the increase in overall system complexity while achieving precision improvement
Data Source
AI summary
Provided is an autonomous vehicle assistance device and method that may precisely determine a position of a vehicle based on input position error information. The autonomous vehicle assistance device includes a communicator configured to receive satellite navigation information, correction information transmitted from a base station, and position error information transmitted from a fixed body, and a vehicle position determiner configured to calculate first position information corresponding to the received satellite navigation information and correction information and to calculate a current position of a vehicle by correcting the first position information based on the position error information.