Golf Swing Phase Identification Using Threshold Analysis
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Solution Overview
Problem
Existing movement analysis technologies for golf swings rely on impact detection, which may not accurately identify the range of swing movements, especially for variations in player technique.
Innovation Solution
A processor-based system that acquires movement information from sensors attached to a golfer, using threshold values to identify the start and completion of a golf swing without relying on impact detection, by analyzing angular velocities and determining specific phases of the swing through a series of threshold values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If impact detection is used to identify swing range, then the detection method is simple, but the measurement precision of swing range is insufficient
Solution Approach 1:
The swing movement is segmented into multiple phases (address, backswing, downswing, finish) with distinct start and end points. The processor identifies each phase separately by detecting specific movement patterns and threshold crossings, rather than treating the swing as a single impact event. This segmentation enables precise identification of swing range boundaries.
Solution Approach 2:
The system performs preliminary identification of swing start points by detecting when movement parameters first exceed thresholds before the actual impact occurs. By identifying the address phase start and backswing start in advance of impact, the system establishes accurate swing range boundaries without relying on impact detection.
2Adaptability or versatility
If impact time is used as reference, then the analysis method is simple, but the adaptability to different player techniques is poor
Solution Approach 1:
The system uses dynamic threshold values that adapt to different player techniques and swing characteristics. Instead of fixed impact-time references, the processor continuously monitors movement parameters and identifies phase transitions when dynamically determined thresholds are crossed, allowing accommodation of varying swing speeds, amplitudes, and techniques.
Solution Approach 2:
The system changes multiple parameters simultaneously (angular velocity, acceleration, time duration, threshold values) to identify swing phases. By monitoring combinations of parameters rather than relying on a single impact time reference, the system adapts to different player techniques while maintaining analysis efficiency through coordinated parameter evaluation.
Data Source
AI summary
A movement analysis device includes a sensor information acquisition unit and a swing identification processing unit. The sensor information acquisition unit acquires sensor information that is movement information from a sensor unit which is attached to a target person and which senses the movement of the target person. The swing identification processing unit individually identifies the time of the start of the movement and the time of the completion thereof with reference to a predetermined threshold value in a predetermined timing of the sensor information that is the movement information acquired from the sensor information acquisition unit. The swing identification processing unit identifies a movement within the range of the operation based on the time of the start of the movement and the time of the completion that are identified.