Passenger-Aware FCA Braking for Standing and Unbuckled Occupants
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Solution Overview
Problem
Existing forward collision avoidance assist systems in vehicles, particularly in multi-use vehicles like buses, often lead to safety accidents for passengers due to sudden stops during operations, especially when passengers are standing or unbuckled.
Innovation Solution
A vehicle passenger accident prevention system that includes a controller to detect the seated state of passengers and the wearing state of seat belts, and adjusts the operation of the forward collision avoidance assist system by applying a preemptive operation mode with increased collision duration and reduced deceleration rate when a standing passenger or unbuckled seat belt is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the forward collision avoidance assist system operates with standard braking, then collision avoidance is achieved, but passenger safety is compromised due to sudden stops
Solution Approach 1:
The system performs preliminary detection of standing passengers using sensors before the FCA system activates braking. When a standing passenger is detected, the system pre-adjusts braking parameters to reduced deceleration rates, ensuring that the harmful effect of sudden stops is prevented before it occurs while maintaining collision avoidance capability
Solution Approach 2:
The system changes the braking parameters (deceleration rate, braking force) based on the detected passenger state. For standing passengers, it applies reduced deceleration rates compared to normal braking, thereby modifying the braking characteristics to prevent passenger injury while still achieving collision avoidance
2Speed
If the FCA system applies strong braking to ensure collision avoidance, then stopping distance is reduced, but passenger comfort and safety deteriorate
Solution Approach 1:
The system dynamically adjusts the braking deceleration rate based on real-time detection of passenger states. The braking force is not fixed but varies according to whether standing passengers are present, allowing the system to optimize between collision avoidance performance and passenger safety by making the braking characteristic adaptable to current vehicle conditions
3Object-affected harmful factors
If the system detects standing passengers and adjusts FCA operation, then passenger safety is improved, but system complexity increases
Solution Approach 1:
The system introduces sensor detection as an intermediary mechanism between the driver and the FCA braking system. The sensors detect standing passengers and provide this information to the controller, which then adjusts braking parameters accordingly. This intermediary detection layer enables passenger safety improvement without requiring fundamental redesign of the core FCA braking mechanism
Data Source
AI summary
A vehicle passenger accident prevention system includes a vehicle operation status measurement unit that measures operation states of a vehicle and outputs corresponding signals, a driving unit to drive the vehicle, a braking unit to brake the vehicle, a FCA system that controls the operation of the driving unit and the braking unit, and a controller that detects the seated state of a passenger in the vehicle or a wearing state of a seat belt according to the output signal of the vehicle operation status measurement unit. In particular, the controller controls the operation of the FCA system according to a predetermined control mode in advance when a standing passenger in the vehicle is detected or an unbuckled seat belt is detected.