Swing Analysis Device Using Angular Velocity Threshold Detection
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Solution Overview
Problem
Existing swing analyzing devices require users to manually indicate the start and end of swing motion measurements, limiting natural movement and imposing a high calculation load due to waveform pattern matching processes.
Innovation Solution
A swing analyzing device that uses a motion sensor to detect physical quantities, extracts swing candidate data, and determines true swing data based on predefined conditions, such as impact timing and phase duration ratios, without requiring user input for timing, and employs an angular velocity sensor for precise motion detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If waveform pattern matching is performed to extract swing data from sensing data, then swing data can be extracted with high precision, but the calculation load becomes large
Solution Approach 1:
The patent segments the swing detection process into two stages: first extracting swing candidate data using simple threshold-based detection of angular velocity changes, then validating candidates using determination conditions. This segmentation avoids the need for computationally intensive waveform pattern matching while maintaining acceptable precision for swing detection.
Solution Approach 2:
The patent changes the detection parameter from complex waveform pattern matching to simpler angular velocity threshold detection. By monitoring whether angular velocity exceeds a predetermined threshold, the system achieves swing detection with significantly reduced calculation load while still capturing the essential swing motion characteristics.
2Measurement precision
If a user manually indicates the timings of the start and end of measurement, then measurement timing can be precisely controlled, but the swing motion is limited and cannot be measured in natural movement
Solution Approach 1:
The system performs self-service by automatically detecting swing motions through continuous monitoring of angular velocity data from the motion sensor. The determination unit autonomously identifies swing candidates and validates them against predetermined conditions, eliminating the need for user input while capturing natural swing movements as they occur.
Solution Approach 2:
The patent implements continuous detection of swing motions by constantly monitoring angular velocity data without interruption. This continuous action allows the system to capture natural swing movements in real-time, whether the user is practicing or competing, without requiring manual start/stop commands that would interrupt the flow.
3Measurement precision
If the determination conditions are made more stringent to ensure accurate swing data selection, then measurement precision improves, but the complexity of the determination process increases
Solution Approach 1:
The patent uses predetermined determination conditions based on simple parameter comparisons: checking if the number of impact timings equals one, if down swing time is shorter than back swing time, and if the top time ratio falls within a predetermined range. These parameter-based conditions provide accurate swing validation without requiring complex algorithms or multiple sensors.
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 natural swing motion analysis without user-timed measurements and reduces calculation load, providing precise detection of swing phases with detailed analysis of rhythm and motion timing.
Implementation Method 1
a motion sensor which detects a physical quantity generated by a swing
Data Source
AI summary
A swing analyzing device includes at least a motion sensor, a data acquiring unit, a motion detecting unit, and a swing data determining unit. The data acquiring unit acquires detection data of the motion sensor. The motion detecting unit uses the acquired detection data to detect a motion of a swing and extracts, as swing candidate data, data from which the motion of the swing is detected. The swing data determining unit selects true swing data from the swing candidate data based on determination conditions associated with the swing.