Adaptive Airbag Deployment for Variable Seat Postures
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Solution Overview
Problem
Conventional airbag systems are ineffective in protecting occupants when the seat back is excessively tilted rearward or the seat is moved forward or rearward, as they are designed for a fixed driving posture, and this poses a safety risk in collisions, especially in autonomous vehicles where occupant postures can vary.
Innovation Solution
A system comprising a seat posture sensor, collision detector, and controller that determines the collision direction and selectively deploys airbags based on seat posture data, optimizing airbag deployment to ensure occupant safety by adjusting the deployment of side, curtain, and knee airbags, as well as operating seat belts, according to the detected seat angles and occupancy configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional airbag systems are designed for a fixed driving posture with a seat back at a suitable angle, then the airbag deployment is optimized for standard driving conditions, but the system becomes ineffective when the seat back is excessively tilted rearward or the seat is moved forward or rearward
Solution Approach 1:
The airbag control system transitions from a static design based on fixed driving posture to a dynamic system that detects real-time seat position and occupant posture through sensors, and adjusts airbag deployment parameters accordingly. The controller modifies deployment timing, force, and sequence based on detected seat back angle and seat position, enabling the system to adapt to varying postures including reclined positions in autonomous vehicles.
Solution Approach 2:
The system changes deployment parameters such as deployment timing, expansion force, and airbag selection based on detected seat posture parameters. When the seat back angle exceeds a reference angle or seat position deviates from standard ranges, the controller adjusts these parameters to optimize protection effectiveness for the detected posture condition.
2Ease of operation
If the seat back is tilted rearward to create a relaxation space in autonomous vehicles, then occupant comfort is improved, but the conventional airbag deployment manner becomes ineffective for protecting occupants during collisions
Solution Approach 1:
The system performs preliminary detection of seat back angle and occupant posture before a collision occurs. When a collision is detected, the controller has already determined the appropriate deployment strategy based on the pre-detected relaxed posture, enabling timely and effective airbag deployment tailored to the occupant's actual position rather than assuming a standard driving posture.
Solution Approach 2:
The system continuously monitors seat position and occupant posture through sensors and provides feedback to the airbag controller. This feedback loop enables the controller to adjust airbag deployment parameters in real-time based on the actual occupant configuration, ensuring effective protection even when occupants are in relaxed postures with rearward-tilted seat backs.
3Reliability
If multiple airbags are deployed to protect occupants in various collision scenarios, then occupant protection coverage is improved, but the system complexity increases
Solution Approach 1:
The airbag system is segmented into multiple independent airbags (front airbags, side airbags, curtain airbags, knee airbags) that can be selectively deployed based on collision type and seat posture. The controller divides the protection task among different airbags, deploying only the necessary ones for each specific scenario rather than deploying all airbags simultaneously, thus maintaining comprehensive coverage while managing system complexity through selective activation.
Data Source
AI summary
A system for protecting one or more occupants in a vehicle includes a seat posture sensor configured to detect seat posture data, a collision detector configured to detect collision data of the vehicle, and a controller. The controller is configured to receive the collision data from the collision detector, determine a collision generation direction, and selectively deploy one or more airbags provided around the one or more occupants according to the collision generation direction and the seat posture data detected by the seat posture sensor.