Vehicle Coordinate Transformation via Trajectory Geometry
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Solution Overview
Problem
Existing systems face challenges in seamlessly transitioning vehicle position data between different coordinate systems, such as from a transponder system to a satellite navigation system, leading to potential navigation disruptions and inaccuracies, especially when switching between indoor and outdoor systems or when satellite signals are blocked.
Innovation Solution
A method and system that derive transformation parameters by combining position data from various systems with geometric parameters of the vehicle's trajectory, allowing for smooth transitions between coordinate systems by calculating and correcting for distortions, scales, and orientations using geometric information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If vehicle position data is obtained from multiple different coordinate systems (transponder system, satellite navigation system), then position detection coverage is improved, but navigation discontinuities and inaccuracies occur during system transitions
Solution Approach 1:
The patent introduces a coordinate transformation module that acts as an intermediary between different coordinate systems (transponder system and satellite navigation system). This module calculates transformation parameters to convert position data from one coordinate system to another, enabling seamless transitions without navigation discontinuities. The intermediary transformation process ensures continuous and accurate navigation by bridging the gap between different positioning systems.
2Device complexity
If transformation parameters are derived without geometric trajectory information, then system complexity is reduced, but transformation accuracy deteriorates due to distortions and scale errors
Solution Approach 1:
The patent employs feedback by utilizing geometric trajectory information (predefined path geometry) to validate and refine the derived transformation parameters. The system compares the vehicle's actual trajectory with the predefined geometric path and uses this feedback to adjust and optimize transformation parameters, thereby improving transformation accuracy while maintaining reasonable system complexity.
Solution Approach 2:
The patent changes the parameters used for transformation derivation by incorporating geometric trajectory characteristics (such as path curvature, length, and orientation) into the transformation parameter calculation. This parameter enrichment allows for more accurate transformations that account for distortions and scale errors, improving measurement precision without excessive complexity increase.
3Measurement precision
If geometric trajectory information is incorporated into transformation parameter derivation, then transformation accuracy is improved, but data processing requirements increase
Solution Approach 1:
The patent applies preliminary action by pre-defining the geometric trajectory information (reference path geometry) before the vehicle begins its journey. This preprocessing of trajectory data allows the system to efficiently compute transformation parameters during operation without requiring complex real-time calculations, thereby improving transformation accuracy while managing data processing requirements.
Data Source
AI summary
A method may determine transformation parameters for a transformation of a position of a vehicle between a first coordinate system and a second coordinate system. In the method, a trajectory may be traveled with the vehicle in a step. In another step, the positions of the vehicle while traveling the trajectory may be acquired in the first coordinate system with a first position detection system, and in the second coordinate system with a second position detection system. In a further step, transformation parameters between the coordinate systems may be derived based on the positions of the vehicle acquired in the coordinate systems, and based on at least one geometric parameter of the trajectory.