Vehicle Child Monitoring with Motion Detection and Timed Alerts
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Solution Overview
Problem
Existing child presence detection systems in vehicles do not account for situations where an adult intentionally leaves a sleeping child in the vehicle, potentially leading to health risks due to prolonged exposure, and existing systems trigger alarms even in such scenarios.
Innovation Solution
A method involving an electronic control unit that deactivates the presence detection system and activates a motion detection module with timers, sending warnings only if the child wakes up or remains motionless for too long, allowing the system to be reactivated if the user does not return promptly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the presence detection system continuously monitors the child, then the child's safety is ensured, but false alarms are triggered when the adult intentionally leaves the sleeping child in the vehicle
Solution Approach 1:
The system dynamically switches between presence detection mode and motion detection mode based on user input. When the user indicates intentional leaving of the child, the system transitions from continuous presence monitoring to motion-only monitoring, allowing the child to sleep undisturbed while still providing safety monitoring.
Solution Approach 2:
The user is prompted before leaving the vehicle to indicate whether they are intentionally leaving the child alone. This preliminary action allows the system to adjust its monitoring behavior in advance, preventing false alarms before they occur.
2Object-generated harmful factors
If the presence detection system is deactivated to allow the child to sleep, then unnecessary alarms are prevented, but the child's safety monitoring is compromised
Solution Approach 1:
The system maintains dynamic monitoring capability by switching to motion detection mode rather than fully deactivating monitoring. This allows the system to remain responsive to safety-critical events (child waking up or moving) while ignoring normal sleep movements.
Solution Approach 2:
The system changes the detection parameter from presence detection to motion detection when the user indicates intentional leaving of the child. This parameter change allows the system to distinguish between absence (safety issue) and sleep movements (normal condition).
3Ease of operation
If the system uses motion detection to monitor the sleeping child, then the child can sleep undisturbed, but the system cannot distinguish between sleep movements and wakefulness
Solution Approach 1:
The system uses a combination of motion detection and timer mechanisms rather than attempting to perfectly detect wakefulness. The timer provides a safety margin that compensates for the reduced precision of motion detection, ensuring that even if some sleep movements are misinterpreted, the child's safety is still protected.
Solution Approach 2:
The timer acts as an intermediary between motion detection and alarm triggering. Instead of directly alarming on any motion detected, the system uses the timer to evaluate whether the motion pattern persists long enough to indicate wakefulness, thereby improving measurement precision without disturbing the child's sleep.
4Reliability
If the system sends immediate warnings when motion is detected, then the child's wakefulness is quickly notified, but the child may be disturbed during normal sleep movements
Solution Approach 1:
The system uses periodic motion detection with timer intervals rather than continuous immediate alarming. Motion is detected periodically, and the timer evaluates whether the motion persists across multiple detection cycles before triggering an alarm, thereby distinguishing between transient sleep movements and sustained wakefulness.
Solution Approach 2:
The system incorporates feedback through the timer mechanism that continuously monitors motion patterns. If motion ceases within the timer period, the system feedback indicates the child is likely still sleeping. If motion persists, the feedback triggers a warning, thus balancing notification reliability with sleep continuity.
Data Source
AI summary
The invention relates to a method for monitoring a child (2B) implemented by a child monitoring system (50), comprising an electronic control unit (510) and a motion detection module (520), comprising the following steps of:activating a motion detection module (520) and a first timer expiring at the end of a first predetermined duration;the electronic control unit (510) sending a warning message if the motion detection module (520) detects a movement of the child (2B), with said warning message being sent via the antenna module (10) to the communication device (2A-1) of the user (2A);reactivating the presence detection system (40) when said first timer has expired if no movement of the child (2B) is detected by the motion detection module (50) during the first predetermined duration.