ARHUD Trajectory Overlay for LCV Off-Tracking
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Solution Overview
Problem
Existing Collision Avoidance Systems (CAS) for vehicles do not provide drivers with visual alerts of predicted and recommended trajectories overlaid onto road geometry, making it difficult for Longer Combination Vehicles (LCVs) to navigate tight spaces without off-tracking, which can lead to collisions.
Innovation Solution
A driving guidance system that includes an Augmented Reality Head Up Display (ARHUD) on the windshield, which generates images of predicted and recommended vehicle trajectories based on input signals from various sensors and GPS data, allowing drivers to see these trajectories overlaid onto the road geometry, with color differentiation and dynamic notification symbols to indicate necessary actions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If drivers manually control the vehicle trajectory without visual aids, then the driver maintains full operational control, but the driver cannot accurately perceive the predicted and recommended trajectories, leading to off-tracking and collision risks
Solution Approach 1:
The patent introduces an ARHUD system as an intermediary between the vehicle's trajectory control systems and the driver. The system processes data from multiple sensors (GPS, inertial sensors, vehicle dynamics sensors) and presents the information through augmented reality visuals overlaid on the windshield, allowing the driver to see predicted and recommended trajectories without directly controlling the complex data processing
Solution Approach 2:
The patent replaces traditional mechanical information delivery methods (physical displays, audible warnings) with optical augmented reality projections directly on the windshield. This substitution allows trajectory information to be visually overlaid on the driver's field of view, providing intuitive spatial context that mechanical displays cannot achieve
2Reliability
If existing CAS systems provide collision warnings, then collision prevention is enhanced, but drivers do not receive visual alerts of predicted and recommended trajectories overlaid onto road geometry
Solution Approach 1:
The patent transitions from two-dimensional display surfaces (dashboards, screens) to the three-dimensional space of the windshield, projecting trajectory information directly into the driver's field of view. This dimensional change allows the trajectory data to be spatially aligned with the actual road geometry, providing intuitive depth and position context that flat displays cannot provide
Solution Approach 2:
The patent uses color-coded trajectory indicators to convey different types of information: predicted trajectories may be shown in one color while recommended trajectories appear in another, allowing the driver to quickly distinguish between different trajectory types and make informed decisions without cognitive overload
3Ease of operation
If LCVs navigate tight spaces without trajectory guidance, then the vehicle maintains operational simplicity, but off-tracking occurs when trailers run over curbs or encroach oncoming traffic lanes
Solution Approach 1:
The system calculates and displays predicted and recommended trajectories in advance, allowing the driver to see the expected path before executing the maneuver. This preliminary visualization enables the driver to anticipate the trailer's path through tight spaces and make corrective steering adjustments before off-tracking occurs, rather than reacting after the problem arises
Solution Approach 2:
The system continuously monitors vehicle position, speed, and orientation, then updates the displayed trajectories in real-time based on actual vehicle behavior. This closed-loop feedback allows the trajectory guidance to adapt to actual driving conditions, maintaining accuracy even as the vehicle navigates dynamic environments
Data Source
AI summary
A driving guidance system is provided for a motor vehicle having a windshield. The system includes an input device for generating an input signal associated with the movement of the motor vehicle, a road detection module for generating a road signal associated with a road geometry, and an ARHUD for generating a plurality of images upon the windshield. The system further includes a computer having a processor and a non-transitory computer readable medium storing instructions, such that the processor is programmed to receive the input signal and the road signal. The processor is further programmed to determine a predicted trajectory and a recommended trajectory of the motor vehicle along the road geometry based on the input signal and the road signal. The ARHUD is configured to generate the images upon the windshield and overlaid onto the road geometry to notify the driver of the predicted trajectory and the recommended trajectory.