Vehicle Passenger Reminder Alert Flag Logic
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Solution Overview
Problem
Existing passenger reminder systems in vehicles deactivate during temporary stops, such as refueling, leading to a lack of notification for rear passengers when the driver restarts the vehicle, as the system assumes no passengers are present due to inactivity of rear doors.
Innovation Solution
A system that maintains an alert flag activated during temporary stops, using sensors to detect vehicle ignition and door states, ensuring notifications are generated when the vehicle is parked again, even if the driver exited without opening rear doors, by integrating a processor and sensors to monitor door and ignition states and generate alerts based on predefined thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the passenger reminder system deactivates during temporary stops to avoid false alarms, then the system reduces false notifications, but it fails to notify drivers of actual rear passengers when the vehicle is restarted
Solution Approach 1:
The system applies different alert behaviors to different stop scenarios: it maintains alert flags for temporary stops (refueling, shopping) where passengers may be left behind, but deactivates alerts for prolonged stops where passengers are expected to exit. This localized differentiation resolves the contradiction by preserving notifications when needed while avoiding false alarms when appropriate.
Solution Approach 2:
The system dynamically adjusts the alert state based on stop duration and vehicle restart events. The alert flag transitions from active to inactive or remains active depending on whether the stop exceeds a threshold duration or is identified as temporary. This dynamic behavior allows the system to maintain reliability while preventing information loss about passenger presence.
2Measurement precision
If the system monitors rear door closure to determine passenger presence, then it can detect when passengers are loaded, but it cannot detect passengers left behind during temporary stops
Solution Approach 1:
The system performs preliminary actions by setting the alert flag when rear doors are closed during vehicle operation, preparing for potential passenger presence. This preliminary detection is then refined by evaluating stop duration and restart events, allowing the system to adapt its response based on the specific scenario while maintaining initial detection capability.
Solution Approach 2:
The system uses feedback from vehicle restart events and stop duration measurements to adjust the alert state. When the vehicle is restarted after a temporary stop, the system evaluates whether the alert flag should remain active based on the stop characteristics, creating a feedback loop that improves both detection precision and scenario adaptability.
3Productivity
If the alert flag is deactivated after temporary stops, then the system reduces unnecessary notifications, but it creates safety risks by failing to alert drivers of overlooked passengers
Solution Approach 1:
The system changes the alert flag parameter state based on stop duration and vehicle restart conditions. For temporary stops where passengers may be left behind, the alert flag remains active to prevent safety risks. For prolonged stops where passengers are expected to exit, the alert flag is deactivated to maintain system efficiency. This parameter-based differentiation resolves the contradiction between productivity and safety.
Data Source
AI summary
A vehicle includes a body controller having a plurality of sensors that detect a state of a driver door and a rear passenger door and detect an ignition state of the vehicle. The vehicle includes a processor that activates an alert flag in response to receiving a first signal from the body controller indicating an ignition of the vehicle has been started and receiving a second signal from the body controller indicating the rear passenger door of the vehicle has been closed within an activation threshold time. The processor determines that the vehicle has made a temporary stop and maintains the activated alert flag upon detecting that the vehicle has been started in response to determining that the vehicle has made the temporary stop. The processor generates a notification in response to detecting that the vehicle has been parked a second time. The notification may include a camera feed.