Vehicle Positioning Using V2V Signals and Relative Sensing
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Solution Overview
Problem
Existing vehicle positioning systems using GNSS data are prone to inaccuracies due to adverse weather conditions, which can compromise the functionality of vehicle functions.
Innovation Solution
A method and device that utilize vehicle-to-vehicle communication and sensor data, such as ultrasonic and optical signals, to determine a vehicle's absolute position by combining vehicle information and relative positioning with GNSS data, allowing for improved accuracy even in poor weather conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GNSS data is used for vehicle positioning, then vehicle position can be determined, but positioning accuracy deteriorates under adverse weather conditions
Solution Approach 1:
The patent combines multiple positioning methods (GNSS, dead reckoning, and map matching) into a unified positioning system. The system dynamically selects and integrates data from different sources based on their respective advantages, thereby maintaining high positioning accuracy and reliability under various weather conditions.
Solution Approach 2:
The system dynamically adjusts positioning parameters and method selection based on environmental conditions. When GNSS accuracy degrades under adverse weather, the system changes its operational parameters by increasing reliance on dead reckoning and map matching algorithms, thus maintaining positioning reliability.
2Reliability
If multiple signal channels are used for vehicle information transmission, then information reliability improves, but system complexity increases
Solution Approach 1:
The patent employs multiple signal channels (V2V communication and sensor data signals) that can serve multiple functions. These channels not only transmit vehicle information for positioning but also provide data for vehicle identification, relative position determination, and environmental awareness, thereby justifying the increased system complexity through enhanced multi-functionality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances vehicle positioning accuracy by leveraging existing vehicle communication and sensor technologies to correct GNSS inaccuracies, enabling reliable navigation and control functions even in adverse weather.
Implementation Method 1
the data signal may represent a signal provided acoustically by the other vehicle. For example, the data signal may be implemented as an ultrasonic signal
Implementation Method 2
the data signal or a parallel further data signal may represent a signal provided optically by the other vehicle. Advantageously, the data signal may be emitted as a light signal by using a light source already installed in the other vehicle
Data Source
AI summary
A method for determining an absolute position for an ego vehicle. The method includes a step of determining an other vehicle position of another vehicle and a piece of vehicle information of the other vehicle by using a vehicle signal that represents a vehicle-to-vehicle message of the other vehicle. The method furthermore comprises a step of determining a piece of vehicle information of the other vehicle and a relative position between the ego vehicle and the other vehicle by using a data signal provided by the other vehicle and a step of ascertaining the absolute position of the ego vehicle by using the other vehicle position and the relative position.