Onboard Warning System Using Absolute Acceleration Detection
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Solution Overview
Problem
Existing active safety systems in vehicles often intervene too late in critical situations, leading to a trade-off between effectiveness and false alarms, as they primarily assess threat levels based on relative movements rather than early signs of unusual maneuvers that may precede accidents.
Innovation Solution
An onboard warning system that detects absolute acceleration of external objects relative to a ground-fixed coordinate system, generating a warning signal when this acceleration exceeds a threshold value, allowing for earlier intervention in potentially hazardous situations without increasing false alarms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing active safety systems assess threat levels based on relative movements between host vehicle and external objects, then the system can identify potential collision risks, but the intervention timing is delayed and false alarms increase due to inability to detect unusual maneuvers at early stages
Solution Approach 1:
The system performs preliminary detection of unusual maneuvers by monitoring absolute acceleration of external objects before a collision threat fully develops. By detecting abnormal acceleration patterns early, the system triggers warnings in advance of actual collision risk, enabling earlier driver response and intervention while maintaining reliability through sophisticated threshold-based filtering of false alarms
2Loss of time
If existing active safety systems intervene based on late-stage threat assessment, then false alarms are reduced, but the effectiveness of accident prevention is compromised due to delayed intervention
Solution Approach 1:
The system performs preliminary detection of unusual maneuvers by monitoring absolute acceleration of external objects before a collision threat fully develops. By detecting abnormal acceleration patterns early, the system triggers warnings in advance of actual collision risk, enabling earlier driver response and intervention while maintaining reliability through sophisticated threshold-based filtering of false alarms
3Reliability
If the system monitors absolute acceleration of external objects to detect unusual maneuvers, then early assessment capability is improved, but the system complexity increases due to additional sensor processing and coordinate transformation requirements
Solution Approach 1:
The system introduces an intermediary processing layer that transforms sensor data from the host vehicle's reference frame to the ground-fixed coordinate system. This intermediary coordinate transformation enables accurate measurement of absolute acceleration of external objects, allowing early detection of unusual maneuvers while managing complexity through modular data processing architecture
Solution Approach 2:
The warning system integrates multiple functions including absolute acceleration measurement, coordinate system transformation, threshold comparison, and warning generation into a unified processing unit. This multi-functional approach enables early assessment of unusual maneuvers while reducing overall system complexity by consolidating processing tasks rather than requiring separate dedicated systems
Data Source
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AI summary
The invention relates to an onboard warning system for a host vehicle (1), a system comprising a sensor system detecting a presence of external objects (2) within a sensor detection area (3) and an external object movement determination unit (5) arranged to determine a measure of a relative movement of said external objects to said host vehicle. The invention is characterized in that the warning system further includes: a host vehicle movement determination unit (4) arranged to determine a relative movement of said host vehicle to a ground-fixed coordinate system; a unit (6) for determination of a measure of a absolute acceleration of said external objects to said ground-fixed coordinate system by transformation of the measure of the relative movement of said external objects to said host vehicle into said ground-fixed coordinate system using the relative movement of said host vehicle determined by said host vehicle movement determination unit; and a warning signal generator (7) arranged to generate a warning signal when said measure of absolute acceleration of said external objects relative to said fixed ground acceleration system in the sensor detection area exceeds a threshold value.