Portable Electronic Apparatus Automatic Rest Detection
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Solution Overview
Problem
Existing portable electronic devices for monitoring swimming performance struggle to accurately detect the transition between swimming and rest states, leading to difficulties in initiating rest time measurement without user intervention, especially when the user forgets to operate the device.
Innovation Solution
A portable electronic apparatus equipped with an operation section, body motion sensor, timing section, and processor that automatically starts rest time measurement when it fails to detect a rest start signal or periodic motion, ensuring continuous and accurate tracking of exercise and rest times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If automatic rest detection is implemented using acceleration sensor waveform analysis, then the device can operate without user intervention, but the response time to detect rest state is delayed due to predetermined period analysis requirement
Solution Approach 1:
The system performs preliminary analysis of acceleration sensor waveforms continuously during exercise, preparing detection data in advance. When rest is detected, the system can quickly confirm the state change without starting analysis from scratch, reducing the effective detection delay while maintaining automated operation
Solution Approach 2:
The system uses periodic waveform analysis at predetermined intervals to detect rest states. By analyzing acceleration patterns at regular intervals and comparing them against rest criteria, the system achieves automated detection with manageable time delays suitable for workout management
2Measurement precision
If user operation is required to detect rest start and termination, then the detection accuracy is high, but the user may forget to operate the device due to fatigue accumulation
Solution Approach 1:
The system performs self-monitoring by automatically analyzing acceleration sensor data to detect rest states without requiring user input. The device serves itself by using its own sensor data to determine workout state changes, eliminating the need for user operations while maintaining detection functionality
Solution Approach 2:
The system continuously monitors acceleration patterns and provides feedback about detected rest states. By analyzing the waveform data and comparing it against predefined criteria, the system creates a closed-loop feedback mechanism that automatically adjusts workout management based on detected motion patterns
3Reliability
If waveform analysis is performed for predetermined period to determine swimming termination, then false detection is reduced, but the response time to detect rest state is further delayed
Solution Approach 1:
The system performs partial waveform analysis by examining only the necessary portions of the acceleration waveform to detect rest states. Instead of analyzing the entire predetermined period, the system identifies key characteristics that indicate rest, achieving sufficient detection accuracy with reduced analysis time
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
Enables automatic initiation and termination of rest time measurement, even if the user forgets to operate the device, providing accurate and continuous tracking of exercise and rest times, enhancing user experience and data reliability.
Implementation Method 1
a body motion sensor adapted to output a body motion signal based on a motion of the user
Data Source
AI summary
A portable electronic apparatus includes an operation section adapted to receive an operation of a user and output a rest start signal representing start of a rest, a body motion sensor adapted to output a body motion signal based on a motion of the user, a timing section adapted to measure rest time of the user, and a processor electrically connected to the operation section, the body motion sensor, and the timing section, and the processor starts the measurement of the rest time by the timing section in the case in which the processor fails to detect the rest start signal, and fails to detect the periodic component based on the motion of the user in the body motion signal for a predetermined period.