Mobile Terminal Driver-Seat Detection for In-Vehicle App Limitation
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Solution Overview
Problem
Existing mobile terminal device technologies either require external devices for driver state detection, leading to complex configurations, or rely on inaccurate speed estimation using vibration sensors, resulting in incorrect determination of vehicle travel.
Innovation Solution
A mobile terminal device method that determines if the user is on the driver seat and if the vehicle is traveling using internal components like a camera and GPS receiver, limiting application use when both conditions are met.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If external devices (driver monitoring camera, sound collection microphone, heart rate monitor, handle pressure sensor) are used for driver state detection, then the accuracy of driver state detection is improved, but the device complexity increases
Solution Approach 1:
The mobile terminal device performs driver state detection using its own built-in camera and sensor components without requiring external monitoring devices. The device serves itself by utilizing its existing hardware resources (camera, acceleration sensor, GPS receiver) to detect whether the user is in a driver state, thereby eliminating the need for additional external monitoring equipment while maintaining detection functionality
Solution Approach 2:
The mobile terminal device's camera and sensors are used for multiple purposes: both for the device's normal communication functions and for driver state detection. The same camera that captures images for messaging or photography is also used to monitor the driver's facial expressions and eye state, while the acceleration sensor serves both motion detection for calls and vehicle motion detection for driving state identification
2Device complexity
If vibration sensor is used for speed estimation, then the device complexity is reduced, but the measurement precision deteriorates
Solution Approach 1:
The patent replaces the mechanical vibration-based speed estimation method with a GPS receiver-based positioning method. Instead of using the acceleration sensor to estimate speed through vibration analysis (which yields inaccurate results), the system uses the GPS receiver to obtain precise position information and calculate speed from position changes over time, significantly improving measurement accuracy
Solution Approach 2:
The system changes the measurement parameter from vibration frequency (inaccurate for speed) to position coordinates (accurate for speed calculation). By using GPS position data and calculating the rate of position change, the system achieves accurate speed measurement without relying on imprecise vibration-based estimation
3Reliability
If the mobile terminal device limits application use during driving, then the safety is improved, but the ease of operation deteriorates
Solution Approach 1:
The system dynamically adjusts application availability based on the detected driving state. When the user is identified as being in a driver state (through camera analysis of facial expressions and eye state, combined with GPS speed detection), the system automatically limits or prohibits application use. When the driving state is not detected, normal application operation is permitted, thus adaptively balancing safety requirements with user convenience
Data Source
AI summary
The purpose is to provide a mobile terminal device that can limit the use of the application by detecting the user position of the mobile terminal device and the speed of the vehicle by itself. To this end, provided is a function limitation method of a mobile terminal device with function limitation capable of limiting a use of an application, including, a step of determining whether or not a limitation target application of the mobile terminal device is in activation, a usage position check step of determining, by the mobile terminal device, a user of the mobile terminal device is on a driver seat, and a speed check step of calculating, by the mobile terminal device, a vehicle in which the user of the mobile terminal device is riding is traveling, in which the use of the application is limited or terminated when the user of the mobile terminal device is on the driver seat, and the vehicle is traveling.