Vehicle Intersection Estimation via Stopping Distance
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Solution Overview
Problem
Current vehicle safety systems rely on navigation information to determine intersection locations, which is inadequate for accurately assessing potential collision threats, particularly when a driver intends to turn or brake.
Innovation Solution
A method that involves receiving vehicle speed, location, and braking information to calculate stopping distances and estimate intersection locations, using this data to control vehicle safety systems and assess potential threats from nearby vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If navigation information is used to determine intersection locations, then the system structure is simple, but the measurement precision of intersection location is insufficient for accurate threat assessment
Solution Approach 1:
The patent introduces an intermediary estimation mechanism that uses vehicle operating parameters (speed, braking information, turning intent) as mediators to calculate stopping distances, which then serve as the basis for determining intersection locations. This intermediary calculation layer bridges the gap between simple navigation data and precise threat assessment requirements.
Solution Approach 2:
The patent replaces reliance on external navigation systems with an internal vehicle-based estimation system that uses the vehicle's own operational data (speed sensors, brake sensors, steering angle sensors) to calculate intersection locations, substituting a mechanical/sensor-based approach for a navigation-information-based approach.
2Reliability
If only navigation information is used, then the information processing is simple, but the reliability of collision threat assessment is insufficient
Solution Approach 1:
The patent merges multiple data sources including vehicle speed, braking information, turning intent, and navigation information into a unified intersection location estimation system. This combination of diverse data streams enhances the reliability of collision threat assessment by cross-validating information from different sensors and systems.
Solution Approach 2:
The system incorporates feedback loops where the estimated intersection location and calculated stopping distances are continuously compared with actual vehicle behavior and navigation data, allowing the system to refine its estimates and improve assessment reliability through iterative validation.
Data Source
AI summary
A method of estimating an intersection location for a vehicle safety system is disclosed. The method includes steps of calculating a stopping distance according to operating parameters of the motor vehicle. The method also includes a step of determining a location for an intersection using the stopping distance and the location of the vehicle. The method further includes steps of determining a distance between a remote vehicle and the intersection. A vehicle safety system is controlled according to the distance between the motor vehicle and the intersection and the distance between the remote vehicle and the intersection.