Road Surface Localization for Precise ADAS Vehicle Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle localization systems, such as those based on global navigation satellite systems (GNSS), lack the accuracy and resolution required for advanced driver assistance systems (ADAS) and autonomous driving applications, particularly in situations involving road surface features and weather conditions.
Innovation Solution
The implementation of a terrain-based localization system that uses road profile data obtained from sensors to determine a vehicle's precise location on a road segment, allowing for the calculation of recommended driving speeds and operating parameters for various vehicle systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GNSS-based localization is used, then the system is simple and widely available, but the localization accuracy and resolution are insufficient for ADAS applications
Solution Approach 1:
The patent combines multiple localization approaches (GNSS, terrain-based localization using road profile data, and inertial navigation) into a unified system. The terrain-based localization component processes road surface data from sensors to determine precise vehicle position, while GNSS provides coarse positioning. This merged approach achieves high accuracy without requiring a complete replacement of the existing GNSS infrastructure.
Solution Approach 2:
The patent introduces terrain-based localization as an intermediary layer between GNSS and the vehicle control systems. The road profile sensor data serves as an intermediary reference that bridges the gap between satellite positioning and precise vehicle location, enabling accurate localization even when GNSS signals are weak or unavailable.
2Measurement precision
If terrain-based localization with real-time road profile data is implemented, then localization accuracy improves, but data processing requirements and computational load increase
Solution Approach 1:
The system performs preliminary processing of road profile data by comparing sensor measurements against pre-stored reference terrain databases. This allows the vehicle to determine its location by matching current road surface characteristics with known terrain features, reducing the need for complex real-time computations and minimizing energy consumption while maintaining high localization accuracy.
3Measurement precision
If terrain-based localization is used, then precise location determination is achieved, but the system requires additional sensors and infrastructure
Solution Approach 1:
The patent makes the vehicle's existing suspension and wheel assembly components serve dual functions: their primary function for vehicle control and their secondary function as road surface sensors for terrain-based localization. By utilizing the suspension movement and wheel contact data already present in modern vehicles, the system obtains road profile information without adding dedicated sensing hardware, thereby reducing overall system complexity.
Data Source
AI summary
Systems and methods described herein include implementation of road surface-based localization techniques for advanced vehicle features and control methods including advanced driver assistance systems (ADAS), lane drift detection, passing guidance, bandwidth conservation and caching based on road data, vehicle speed correction, suspension and vehicle system performance tracking and control, road estimation calibration, and others.