Wearable Sensor System for Swimming Stroke Balance Analysis
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Solution Overview
Problem
Existing swimming analysis technologies are not suitable for personal use due to high system requirements and do not effectively reflect the quality of a swimmer's form, particularly for beginners, as they either require large-scale systems or do not provide direct feedback on swimming form quality.
Innovation Solution
An electronic apparatus equipped with sensors such as atmospheric pressure, acceleration, and angular velocity sensors that outputs information on left-right balance, stroke time, and driving force differences, allowing users to easily check their swimming form quality through graphical representations and advice for improvement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a large-scaled system with imaging portions and pixel extraction is used to analyze swimming form, then measurement precision is improved, but device complexity increases and ease of operation deteriorates
Solution Approach 1:
The patent extracts only the essential measurement function from the complex imaging system by mounting simple sensors (accelerometer, gyroscope, atmospheric pressure sensor) directly on the swimmer's body. This extraction approach captures the necessary motion data without requiring complex image processing infrastructure, thereby reducing device complexity while maintaining measurement precision for swimming form analysis.
Solution Approach 2:
The patent introduces a personal apparatus (wearable device) as an intermediary between the swimmer and the analysis system. This intermediary collects sensor data directly from the swimmer's body and transmits it for processing, eliminating the need for complex external imaging systems while enabling precise measurement of swimming form through body-mounted sensors.
2Device complexity
If sensors are mounted on the swimmer's body to reduce system complexity, then device complexity is reduced and ease of operation is improved, but measurement precision deteriorates as indexes do not directly reflect swimming form quality
Solution Approach 1:
The patent applies local quality by strategically mounting sensors at specific locations on the swimmer's body (head, torso, limbs) to capture localized motion characteristics. By positioning sensors at key anatomical points, the system extracts motion data that directly reflects swimming form quality, transforming simple sensor readings into meaningful form assessment metrics through location-specific measurement.
Solution Approach 2:
The patent transforms raw sensor parameters (acceleration, angular velocity, pressure) into swimming form quality indicators by analyzing motion patterns, stroke rhythm, and body position dynamics. This parameter transformation converts basic sensor outputs into meaningful metrics that directly reflect swimming technique quality, resolving the issue of sensors failing to capture form nuances.
3Measurement precision
If comprehensive sensor data is collected to improve measurement precision, then measurement precision is improved, but loss of information increases due to considerable calculation load
Solution Approach 1:
The patent segments the swimming stroke analysis into distinct phases (entry, pull, push, recovery) and analyzes motion data specific to each phase. By dividing the continuous sensor data stream into stroke-specific segments, the system processes only relevant information for each stroke phase, reducing overall calculation load while maintaining comprehensive form analysis precision through phase-specific metric extraction.
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 users to effectively assess and improve their swimming form by providing clear, user-friendly feedback on left-right balance and stroke efficiency, enhancing their swimming technique without the need for complex systems.
Implementation Method 1
sensors such as atmospheric pressure
Implementation Method 2
acceleration sensors
Implementation Method 3
angular velocity sensors
Data Source
AI summary
An electronic apparatus includes a processor that outputs information regarding a difference between left and right strokes in swimming on the basis of data which is output from a sensor mounted on the body of a user during swimming.