Mobile Device Acceleration Sensor Abduction Alarm Logic
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Solution Overview
Problem
Current mobile communication devices for protected individuals, such as children, lack effective security features to detect and alert against potential abduction by vehicle, particularly when the user transitions from walking to being in a vehicle without maintaining short-range wireless communication.
Innovation Solution
A mobile communication device equipped with a first communicator for short-range wireless communication, a second communicator for wireless communication via another device, and an acceleration sensor that determines the mode of transportation by analyzing acceleration data, triggering an alarm notification to a connected device only when specific conditions, including disconnection of short-range wireless communication, are met.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device continuously monitors acceleration to detect vehicle transitions, then the ability to detect abduction situations is improved, but the risk of false alarms increases when the user is simply in a vehicle with maintained communication
Solution Approach 1:
The system changes the monitoring parameter from continuous acceleration monitoring to monitoring communication connection status. By detecting whether the short-range wireless communication connection is maintained or disconnected, the system can accurately distinguish between legitimate vehicle presence and potential abduction situations, thereby reducing false alarms while maintaining detection reliability.
2Speed
If the device uses only short-range wireless communication for notifications, then the response speed is improved, but the notification reliability decreases when communication is disconnected
Solution Approach 1:
The system introduces an intermediary mechanism that monitors the communication connection status between the mobile device and the communication device. When the connection is disconnected, the intermediary triggers alternative notification methods through the second communicator, ensuring reliable notification delivery while maintaining fast response capability.
3Reliability
If the device monitors communication connection status continuously, then the ability to detect disconnection is improved, but the device complexity increases
Solution Approach 1:
The system merges the communication connection status monitoring function with the existing controller that manages the first and second communicators. By integrating the disconnection detection logic into the existing control architecture, the system achieves reliable disconnection detection without significantly increasing device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances the security of protected individuals by accurately detecting transitions from walking to being in a vehicle and minimizing false alarms, thereby improving the device's ability to alert guardians of potential abduction situations.
Implementation Method 1
an acceleration sensor configured to detect an acceleration
Data Source
AI summary
A mobile communication device comprises: a first communicator configured to perform short range wireless communication with a first communication device not via another device; a second communicator configured to perform wireless communication with the first communication device via another device; an acceleration sensor configured to detect an acceleration; and at least one controller configured to, when it is determined that a travelling means of a user of the mobile communication device is changed from walking to a vehicle based on the acceleration detected by the acceleration sensor, cause the second communicator to notify the first communication device of an alarm when a notification condition is established, and cause the second communicator not to notify the first communication device of the alarm when the notification condition is not established, wherein the notification condition includes a condition that communication between the first communicator and the first communication device is disconnected.