Vehicle Positioning Using Historical Trajectory and Candidate Area Selection
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Solution Overview
Problem
Current vehicle positioning methods, such as GPS and BDS, face challenges in accurately determining a vehicle's location in areas with complex road conditions, often resulting in low positioning accuracy and difficulty in distinguishing between adjacent areas.
Innovation Solution
A vehicle positioning method that utilizes historical driving trajectory information and current coordinate data to select candidate areas and calculate the included angle between vectors, determining the vehicle's location by comparing the direction of entry and driving trajectory, thereby enhancing positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional GPS or BDS positioning methods are used to obtain current position coordinates, then the positioning process is simple, but the positioning accuracy is low in areas with complicated road conditions
Solution Approach 1:
The positioning process is segmented into multiple steps: first obtaining current position coordinates, then selecting candidate areas based on those coordinates, and finally determining the specific area by comparing historical trajectory data. This segmentation allows the system to achieve high accuracy by systematically processing positioning information in distinct stages rather than relying on a single GPS reading.
Solution Approach 2:
The system performs preliminary actions by pre-obtaining historical location coordinates and pre-selecting candidate areas before final position determination. By preparing candidate areas in advance based on current coordinates, the system reduces the complexity of real-time decision-making while improving positioning accuracy through comparative analysis.
2Measurement precision
If only current position coordinate information is used for vehicle location, then the positioning method is simple, but it is impossible to confirm the vehicle's specific area when located on the adjacent boundary of two areas
Solution Approach 1:
The system performs preliminary action by obtaining historical location coordinates before final position determination. This preliminary data collection enables the system to compare past positions with current candidate areas, providing additional context for resolving boundary cases where the vehicle may be located on the adjacent boundary of two areas.
Solution Approach 2:
The system uses historical trajectory information as feedback to validate and refine position determination. By comparing current candidate areas with previously recorded locations and movement patterns, the system can confirm the vehicle's specific area with higher accuracy, especially in boundary situations where current coordinates alone are insufficient.
Data Source
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AI summary
The present invention relates to a vehicle positioning method and device. The method includes the following steps: obtaining current location coordinates of a vehicle, and selecting candidate areas within a preset distance according to the current location coordinates of the vehicle; obtaining historical location coordinates of the vehicle within a preset time, and selecting a first candidate area from the candidate areas according to the historical location coordinates of the vehicle; and judging whether the vehicle enters the first candidate area to determine the current location of the vehicle. The present invention obtains accurate vehicle location information through the historical traveling trajectory information and the current coordinate information of the vehicle, the present invention is simple and feasible, and the positioning accuracy is high.