Inertial Sensor Golf Club Motion Analysis Device
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Solution Overview
Problem
Existing golf swing analysis methods, such as those described in JP-A-2011-110164, face challenges in accurately predicting the type of projectile line due to reliance on video predictions and lack of detailed calculation of incident and face angles, leading to potential inaccuracies in analyzing the projectile line of a golf ball.
Innovation Solution
A motion analysis device and system that utilizes inertial sensors to calculate the relation between the movement direction and posture of the ball hitting surface at impact, including the use of vectors to determine angles, allowing for precise analysis and visualization of the projectile line type through graphical output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If video prediction is used to determine target line, then analysis can be performed, but measurement precision deteriorates due to prediction errors
Solution Approach 1:
The patent replaces the optical/mechanical video-based measurement system with an inertial sensor-based measurement system. The inertial sensor directly measures acceleration and angular velocity of the club head, enabling calculation of incident angle and face angle without relying on video prediction of target line, thus eliminating prediction errors while maintaining ease of operation
Solution Approach 2:
The patent introduces inertial sensors as an intermediary device between the club head and the analysis system. These sensors serve as a mediator that directly captures motion data, replacing the indirect video-based prediction method and providing more accurate measurement data for projectile line analysis
2Measurement precision
If detailed calculation of incident angle and face angle is performed, then measurement precision improves, but device complexity increases
Solution Approach 1:
The inertial sensor unit performs self-service by autonomously measuring acceleration and angular velocity, and the processing unit automatically calculates incident angle and face angle from these measurements. This self-contained system eliminates the need for complex external measurement equipment while achieving high measurement precision through straightforward mathematical calculations based on sensor data
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
The system provides effective data for analyzing the type of projectile line, enabling users to accurately recognize and improve their golf swing by objectively displaying the incident angle, face angle, and projectile line type, facilitating intuitive understanding and improvement.
Implementation Method 1
obtains a relation between a movement direction of a ball hitting surface of an exercise tool at a time of entering an impact and a posture of the ball hitting surface at the time of the impact by using an output of an inertial sensor
Data Source
AI summary
A motion analysis device includes a first calculation unit that obtains a relation between a movement direction of a ball hitting surface of an exercise tool at a time of entering an impact and a posture of the ball hitting surface at the impact by using an output of an inertial sensor.