Mobile Device Walking Safety Control via Sensor Fusion
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Solution Overview
Problem
Conventional mobile electronic devices lack effective methods to determine whether a user is walking while using the device in a specific area, such as an intersection, which can lead to increased power consumption and safety risks due to unnecessary data transmission and potential distractions.
Innovation Solution
A mobile electronic apparatus and control method that utilize a combination of sensors like accelerometers, gyroscopes, and communication units to determine the user's movement state and location, adjusting display and alert settings to prevent smartphone use while walking in critical areas by integrating with roadside units to provide situational awareness through visual, tactile, and auditory cues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous data transmission is performed to maintain communication functionality, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic transmission of data packets instead of continuous transmission. The transmission control unit determines whether to transmit data based on periodic evaluation of transmission necessity, creating intervals of active transmission and idle states. This periodic action reduces overall power consumption while maintaining communication reliability through scheduled updates.
Solution Approach 2:
The patent dynamically adjusts transmission behavior based on real-time conditions. The transmission control unit evaluates current context (user state, location, communication necessity) and adapts transmission frequency accordingly. This dynamic control allows the system to maintain reliability when needed while reducing power consumption during periods when transmission is unnecessary.
2Reliability
If comprehensive sensor monitoring is performed to determine user state and location, then user safety is improved, but device complexity increases
Solution Approach 1:
The patent segments the safety monitoring function into distinct modular components: detection units for different sensor types (accelerometer, gyroscope, camera), a separate user state determination unit, and a transmission control unit. This segmentation allows each component to perform its specific function independently, improving safety through comprehensive monitoring while managing complexity through modular architecture.
Solution Approach 2:
The patent employs multi-functional sensors and processing units that serve multiple purposes. For example, the accelerometer and gyroscope data are used both for determining user walking state and for assessing location-based safety conditions. This multi-functionality reduces the need for dedicated components for each function, thereby improving safety coverage without proportionally increasing device complexity.
3Use of energy by moving object
If data transmission is limited to reduce power consumption, then power efficiency is improved, but communication reliability may deteriorate
Solution Approach 1:
The patent implements a feedback mechanism where the transmission control unit continuously evaluates transmission necessity based on detected user state and location information. This feedback loop ensures that data transmission is maintained when communication reliability is needed (e.g., when user is stationary or in safe locations) while reducing transmission when power efficiency is prioritized (e.g., when user is walking in safe areas), thus balancing both objectives dynamically.
Solution Approach 2:
The patent changes transmission parameters (frequency, data volume, transmission timing) based on evaluated conditions. Instead of binary on/off transmission, the system adjusts transmission intensity and frequency according to user state and context. This parameter adjustment allows the system to maintain adequate communication reliability while optimizing power efficiency through reduced but strategically timed transmissions.
Data Source
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AI summary
A mobile electronic apparatus comprises: a display; a first detector configured to obtain first information; a second detector configured to obtain second information; a broadcast unit; and a controller, wherein the controller causes the display to display a first image if detecting, based on the first information, that a user is walking and determining, based on the second information, that the user is in an area other than a predetermined area, and the controller causes the display to produce a screen display and causes the broadcast unit to perform a first broadcast when detecting, based on the first information, that the user is walking and determining, based on the second information, that the user is in the predetermined area.