Vehicle Position Calculation Function for GPS Error Correction
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Solution Overview
Problem
Existing methods for processing GPS route data are prone to errors due to erroneous signals from GPS receivers, leading to inaccurate vehicle route guidance.
Innovation Solution
A method that utilizes a vehicle position calculation function to replace erroneous GPS data with pre-calculated positions, using speed signals and deactivating the calculation function when the vehicle returns to a road, allowing for improved route guidance by switching between pre-calculated and actual GPS data based on onroad or offroad positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS route data is used for vehicle route guidance, then real-time positioning information is obtained, but erroneous vehicle positions occur due to erroneous GPS signals
Solution Approach 1:
The patent introduces an intermediary system (vehicle position calculation function) that mediates between the GPS receiver and the route guidance system. When GPS signals are erroneous, this intermediary calculates alternative vehicle positions using speed signals and other vehicle data, thereby maintaining route guidance reliability without completely abandoning GPS data
Solution Approach 2:
The system performs preliminary calculations of vehicle positions using speed signals and travel time before GPS errors occur. By pre-calculating expected positions and comparing them with actual GPS positions, the system can detect errors early and switch to alternative positioning methods, preventing erroneous positions from propagating through the route guidance system
2Measurement precision
If vehicle position calculation function is activated to replace erroneous GPS data, then route guidance accuracy is improved, but system complexity increases
Solution Approach 1:
The system dynamically adjusts its complexity by activating or deactivating the vehicle position calculation function based on GPS signal quality. When GPS data is reliable, the simple GPS-based positioning is used. When errors are detected, the more complex calculation function is activated. This dynamic adaptation allows the system to maintain high accuracy while minimizing unnecessary complexity
Solution Approach 2:
The system changes the operational parameters of the positioning system by switching between different data sources and calculation methods based on detected error conditions. By monitoring GPS position plausibility and activating alternative calculation methods only when needed, the system maintains accuracy improvements while avoiding the continuous overhead of complex calculations
3Reliability
If pre-calculated vehicle positions are used for route guidance, then erroneous GPS signals are corrected, but processing time increases
Solution Approach 1:
The system uses pre-calculated position data and speed signals to rapidly determine alternative vehicle positions when GPS errors occur. By leveraging already-available vehicle data (speed, direction, travel time) and performing simplified calculations based on these pre-existing parameters, the system quickly generates corrected positions without extensive processing, thus minimizing time loss while maintaining reliability
Data Source
AI summary
A method for processing GPS route data of a vehicle is proposed, in which the GPS route data are used for the route guidance of the vehicle along a route (1), wherein vehicle positions and an offroad position information or an onroad position information are generated as route data, wherein a vehicle position calculation function for route guidance of the vehicle is used, if erroneous vehicle positions are generated from the GPS route data. Furthermore, a control device for carrying out a method is proposed.