Pre-Active Vehicle Seat Control for Faster Safe Posture Change
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Solution Overview
Problem
The existing pre-active safety seat systems face challenges in rapidly changing the seat posture to a safe position during vehicle collisions, particularly when collision risk detection is delayed, as the required time for posture change is often longer than the available time, leading to potential safety issues.
Innovation Solution
A multi-seat motor system comprising recline, slide, and tilt motors, controlled by a controller that uses sensors to detect the current seat posture and adjust the recline angle, sliding position, and cushion tilt angle to quickly change the seat posture to a safe configuration before a collision, utilizing a seat safety map to determine the necessary motor outputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If only a single recline motor is used to control the seat backrest, then the device complexity is reduced, but the pre-active safety seat speed is insufficient to achieve safe posture change within the required time during collision situations
Solution Approach 1:
The patent divides the seat control system into multiple independent motors, each responsible for a specific degree of freedom: a recline motor for backrest angle control, a slide motor for cushion position control, and a tilt motor for cushion tilt control. This segmentation allows each motor to operate independently and simultaneously, thereby increasing the overall speed of posture adjustment without creating a single point of failure.
Solution Approach 2:
The patent combines multiple motor systems (recline motor, slide motor, tilt motor) into an integrated multi-motor control architecture. These motors work in parallel and are coordinated by a central controller to achieve comprehensive seat posture adjustment. The merging of multiple motor functions enables the system to achieve safe postures faster than a single motor system could accomplish.
2Reliability
If the seat posture change time is extended to ensure safety, then passenger safety is improved, but the available time window for pre-active safety operation is reduced when collision risk detection is delayed
Solution Approach 1:
The system continuously monitors collision risk through ADAS sensors and prepares the seat for pre-active safety adjustment before a collision occurs. When a collision risk is detected, the multi-motor system immediately begins adjusting the seat posture to a safe configuration, utilizing the available time window effectively. The preliminary monitoring and ready-state multi-motor system enable faster response compared to single-motor systems.
Solution Approach 2:
The patent implements dynamic control of multiple motors based on real-time collision risk assessment. The controller adjusts the operation of the recline motor, slide motor, and tilt motor dynamically according to the detected collision scenario and current seat posture. This dynamic multi-motor coordination optimizes the use of available time while ensuring the seat reaches a safe posture, thereby improving reliability without unnecessarily extending the adjustment time.
3Productivity
If multiple motors are used to control different seat parameters simultaneously, then the pre-active safety seat speed is improved, but the device complexity increases
Solution Approach 1:
The patent segments the seat control functions into three independent motor systems, each handling a specific parameter: recline angle, slide position, and tilt angle. This segmentation allows each motor to be optimized for its specific function and to operate independently, increasing the overall productivity of the system. The modular architecture also makes the complexity manageable through clear functional separation.
Solution Approach 2:
The patent creates a universal control architecture that manages multiple motors through a single integrated controller. This controller coordinates the recline motor, slide motor, and tilt motor to work together toward achieving safe seat postures. The universal control system handles various collision scenarios and adjusts multiple parameters simultaneously, achieving high productivity while managing device complexity through unified control logic.
Data Source
AI summary
A pre-active safety seat system applied to the vehicle implements a method for improving a pre-active safety seat speed, which confirms a risk region by matching a recline angle, a slide movement position, and a cushion tilt angle, which are detected from each of a plurality of sensors of a multi-seat sensor in a risk collision situation detected by a vehicle environment sensor of an ADAS, with a seat safety map, and combines and simultaneously controls a plurality of motors of a multi-seat motor configured for a seat target posture of a seat for converting the risk region into a safety region, by a controller, shortening a pre-active safety seat (PSS) required time of a seat target posture in the pre-active safety seat (PSS) operable section before collision of the vehicle from a risk detection.