Vehicle System Detecting Left-Behind Phone via Motion Data
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Solution Overview
Problem
People often forget their mobile devices in vehicles, leading to frustration and increased risk of theft, as existing technologies do not effectively detect if a phone is left behind with the driver or not.
Innovation Solution
A vehicle computing system that uses wireless communication to request and receive motion sensor data from a phone, determining if it is moving with the driver and alerting the driver if it is not, thereby detecting if a phone has been left behind.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If motion sensor data is requested and received wirelessly from the phone to determine if it is moving with the driver, then the detection accuracy of left-behind phone is improved, but the use of energy by the vehicle computing system increases
Solution Approach 1:
The system requests motion sensor data from the phone in advance, before the driver actually leaves the vehicle. By proactively obtaining the phone's motion trajectory data while the driver is still present, the system can determine whether the phone was with the driver without requiring continuous real-time monitoring after departure, thus improving detection accuracy while minimizing additional energy consumption.
2Reliability
If the system continuously monitors motion sensor data to detect left-behind phones, then the reliability of detection is improved, but the loss of time for processing and analyzing data increases
Solution Approach 1:
The system performs the motion data collection and initial analysis before the driver exits the vehicle. By having the motion sensor data ready in advance and comparing it with the driver's exit action, the system achieves reliable detection without requiring time-consuming continuous monitoring and analysis after the driver has already left, thus reducing processing time while maintaining high reliability.
3Device complexity
If the system uses existing proximity warning systems to detect left-behind phones, then the device complexity is reduced, but the measurement precision for detecting phone location is insufficient
Solution Approach 1:
The system leverages the phone's existing motion sensor capabilities (accelerometer, gyroscope) that are already present in modern smartphones for other functions like step counting and fitness tracking. By repurposing these existing sensors for left-behind phone detection, the system avoids adding dedicated detection hardware, thus maintaining low device complexity while achieving high measurement precision through the phone's built-in motion tracking abilities.
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
Effectively alerts the driver if their phone is left in the vehicle, reducing the risk of theft and minimizing frustration by ensuring the device is not forgotten.
Implementation Method 1
through wireless communication with a phone, and after determining that a vehicle engine is not running, request and receive motion sensor data from the phone
Implementation Method 2
determine if a phone is moving with a driver based on the motion sensor data
Data Source
AI summary
A system includes a vehicle computing processor. The processor is configured to, through wireless communication with a phone, and after determining that a vehicle engine is not running, request and receive motion sensor data from the phone. The processor is further configured to determine if a phone is moving with a driver based on the motion sensor data. Also, the processor is configured to alert the driver if the phone is not moving with the driver.