Vehicle Protection Controller Pre-Crash Signal Classification
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Solution Overview
Problem
Existing methods for activating passenger protection systems in vehicles do not effectively utilize pre-crash signals and acceleration sensor data to improve the precision of personal protection device activation, leading to potential activation by irrelevant signals and reduced effectiveness.
Innovation Solution
A control unit evaluates pre-crash signals based on a classification function influenced by pre-crash signals, allowing for the filtering out of irrelevant signals and adjusting the activation of personal protection devices such as airbags and seat elements using a counter initialized by pre-crash signals, ensuring precise activation based on impact time and sensor data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If pre-crash signals are used to activate personal protection devices, then the activation timing can be improved, but irrelevant signals may cause false activation
Solution Approach 1:
The system performs preliminary classification of pre-crash signals using a classification function before activation decision. This preliminary evaluation distinguishes relevant pre-crash signals from irrelevant ones, enabling early activation only when appropriate while avoiding false activation from spurious signals.
Solution Approach 2:
The classification function serves as an intermediary between the raw pre-crash signal and the activation decision. It processes and evaluates the pre-crash signal to determine whether it warrants activation, thereby mediating between early detection and reliable activation.
2Measurement precision
If multiple sensor signals are combined for activation decision, then the precision of activation can be improved, but the system complexity increases
Solution Approach 1:
The signal processing is segmented into distinct functional stages: pre-crash signal generation, classification function evaluation, impact signal processing, and activation decision. This segmentation allows complex multi-sensor integration to be managed through modular, sequential processing steps, reducing overall system complexity while maintaining high activation precision.
Data Source
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AI summary
The invention relates to a controller and a method for actuating personal protection means for a vehicle, wherein the personal protection means are actuated as a function of at least one signal of an impact sensor system and at least one pre-crash signal. The at least one pre-crash signal is analyzed as a function of a classification of at least one function, wherein the function is influenced as a function of the at least one pre-crash signal.