Lost Device Detection Using Sensor Fusion and Periodic Alerts
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Solution Overview
Problem
Portable electronic devices are prone to loss due to their convenience, leading to potential unauthorized use or irreversible loss, as existing methods lack effective mechanisms for self-determination and alerting of their location.
Innovation Solution
The device employs a combination of GPS, accelerometer, camera, and environmental sensors to determine its location and movement, triggering visible and audible alerts or messages to nearby authorities when lost, and can autonomously notify its owner or send alerts to associated devices in wireless hotspots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device continuously monitors location and sends alerts, then the reliability of lost device recovery is improved, but the energy consumption increases
Solution Approach 1:
The device employs periodic location monitoring and alert transmission instead of continuous operation. The system checks location at intervals and only activates alerts when loss is detected, significantly reducing energy consumption while maintaining recovery reliability.
Solution Approach 2:
The lost device autonomously detects its own loss condition using onboard sensors and automatically initiates alert sequences without requiring continuous external monitoring. This self-determination capability reduces the energy burden of constant external tracking.
2Measurement precision
If the device uses multiple sensors and alert mechanisms, then the effectiveness of location detection and alerting is improved, but the device complexity increases
Solution Approach 1:
The device leverages existing multi-functional components already present in modern smartphones (GPS, accelerometer, camera flash, display screen) to perform multiple functions including location tracking, movement detection, and alert generation, avoiding the need for dedicated specialized components.
Solution Approach 2:
The system uses the device's existing camera flash and display screen as alert mechanisms rather than adding dedicated alert components. These existing components are repurposed to serve dual functions: normal operation and lost device alerting.
3Speed
If the device sends alerts to authorities and associated devices, then the speed of device retrieval is improved, but the loss of time for message transmission and processing increases
Solution Approach 1:
The device pre-configures alert destinations (authorities, associated devices, family members) and prepares alert templates in advance. When loss is detected, pre-formatted alerts are immediately transmitted to multiple recipients simultaneously, reducing overall retrieval time despite the transmission process itself.
Solution Approach 2:
The system uses existing communication networks and intermediary services (messaging platforms, emergency services) to rapidly transmit location and alert information to appropriate parties, leveraging established infrastructure to minimize transmission delays.
Data Source
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AI summary
A method for a device to determine that it has been lost is provided. The method comprises the device determining its current location, the device comparing its current location to a plurality of stored locations, and the device determining that it has been lost when its current location is a stored location that has been designated as a location where the device is unlikely to be located or is not a stored location that has been designated as a location where the device is likely to be located.