Vehicle Safety System Pole Side Impact Discrimination
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Solution Overview
Problem
Current vehicle safety systems face challenges in accurately discriminating between different types of crash events, particularly in distinguishing side pole impacts from side barrier impacts, which can lead to delayed activation of safety devices due to the distinct dynamics of these events, potentially compromising occupant protection.
Innovation Solution
The method involves sensing vehicle acceleration parameters, evaluating these parameters to determine crash thresholds, and using satellite safety sensors, airbag control units, and side impact sensors to classify crash events as either pole side impacts or barrier side impacts by comparing relative velocities and displacements, allowing for tailored deployment of safety devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional crash discrimination methods are used, then the system can identify basic crash types, but the system fails to accurately distinguish between pole side impacts and barrier side impacts, leading to delayed activation of safety devices
Solution Approach 1:
The patent segments the crash discrimination process into distinct evaluation stages: initial crash detection, crash type classification (pole vs. barrier), severity assessment, and safety device activation control. By dividing the continuous crash event into discrete evaluation phases with specific thresholds, the system achieves both accurate discrimination and timely response without requiring complex real-time analysis of all parameters simultaneously.
2Measurement precision
If the system uses multiple sensor types and complex evaluation metrics, then crash discrimination accuracy improves, but the device complexity increases
Solution Approach 1:
The patent implements a universal crash evaluation framework that uses a standardized set of sensors (accelerometers, pressure sensors, position sensors) and a common evaluation architecture applicable to multiple crash types (frontal, side, pole, barrier). The same sensor suite and control unit handle all crash scenarios by evaluating different parameter combinations and thresholds, eliminating the need for separate specialized systems for each crash type while maintaining high discrimination accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables timely and appropriate activation of safety devices, enhancing occupant protection by accurately discriminating between pole side impacts and barrier side impacts, thereby improving response times and protection in crash scenarios.
Implementation Method 1
sensing a plurality of vehicle acceleration parameters
Data Source
AI summary
A method for controlling an actuatable safety device for helping to protect a vehicle occupant includes sensing a plurality of vehicle acceleration parameters. The method also includes executing one or more metrics that evaluate the acceleration parameters to determine whether vehicle crash thresholds are exceeded and producing crash event indications in response thereto. The method also includes evaluating the crash event indications to identify a pole side impact, and controlling deployment of the actuatable safety device in response to identifying the pole side impact crash event. In one particular configuration, identifying the pole side impact crash event includes discriminating the pole side impact crash event from a barrier side impact crash event.