Driver Assistance Trajectory Display Using Road Elevation Data
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Solution Overview
Problem
Existing driver assistance systems struggle to accurately display the driving path during a return journey along a recorded trajectory, often resulting in the path being misplaced on the roadway in camera images.
Innovation Solution
The driver assistance system incorporates elevational change information, such as gradient data, into the display trajectory during a second journey, ensuring that the displayed path aligns with the actual road conditions by accounting for the recorded trajectory's elevational changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the driving path is displayed on an electronic visual display during a return journey using recorded trajectory data, then the driver receives guidance for the return journey, but the displayed driving path may be misplaced and not located on the actual roadway in camera images
Solution Approach 1:
The system performs preliminary action by recording not only the two-dimensional trajectory coordinates but also the elevational change information (such as gradient data) during the outward journey. This preliminary capture of vertical profile data enables accurate reconstruction of the driving path in three-dimensional space during the return journey, preventing the path from being misplaced on the roadway display.
Solution Approach 2:
The invention transitions from two-dimensional trajectory representation to three-dimensional spatial representation by incorporating elevational change information. This dimensional enhancement allows the system to account for gradients and vertical profile variations, ensuring that the displayed driving path accurately aligns with the actual roadway geometry in camera images.
2Measurement precision
If elevational change information is incorporated into the display trajectory, then the accuracy of the displayed driving path improves, but the complexity of the driver assistance system increases
Solution Approach 1:
The system achieves multi-functionality by using the existing recorded trajectory data to serve dual purposes: basic path guidance and accurate three-dimensional path reconstruction. By leveraging the same recorded data for both two-dimensional display and three-dimensional alignment with camera images, the system avoids additional dedicated sensors while improving accuracy.
Solution Approach 2:
The invention improves accuracy by changing the parameters used in trajectory representation from simple two-dimensional coordinates to include elevational change information such as gradient data. This parameter enhancement allows the system to compute three-dimensional path positions without requiring fundamentally new system architecture, thereby improving accuracy with moderate complexity increase.
Data Source
AI summary
A driver assistance system is designed to assist a driver of a motor vehicle during a second trip along a trajectory that was recorded during a first trip. The driver assistance system is designed to determine altitude change information regarding an altitude change of the trajectory recorded during the first trip. The driver assistance system is also designed to determine a display trajectory for the second trip using the altitude change information and to cause the display trajectory to be displayed on a display unit.