Golf Swing Analysis With Standardized Virtual Arm And Club Lengths
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Solution Overview
Problem
Existing golf swing analysis methods struggle to accurately compare user swings with comparative models due to variations in user body size and club length, leading to inconsistent and inaccurate evaluations.
Innovation Solution
A method using inertial sensors on the arm and club to calculate angles and trajectories, standardizing arm and club lengths for accurate comparison by aligning and overlapping lines representing user and model swings, with adjustments for non-coinciding angles through interpolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional methods use user's actual arm length and club length for analysis, then the analysis reflects individual characteristics, but accurate comparison with standardized models becomes difficult
Solution Approach 1:
The patent transforms the analysis by changing the reference parameter from actual physical dimensions to standardized virtual dimensions. By projecting the user's swing onto a virtual model with fixed arm and club lengths, the system enables standardized comparison while preserving individual swing characteristics through angle measurements. This parameter transformation resolves the contradiction by decoupling individual adaptation from standardized measurement.
2Ease of operation
If inertial sensors are used to calculate positions through double integration of acceleration, then position information can be extracted, but accuracy deteriorates due to varying initial positions and mixing of acceleration components with gravity and centrifugal forces
Solution Approach 1:
The patent extracts only the necessary angular information from inertial sensor data without performing double integration to obtain position. By using angle values directly from the sensors to define virtual arm and club trajectories, the system eliminates the harmful effects of integration drift and the mixing of gravitational and centrifugal acceleration components, while still achieving the goal of swing analysis.
Solution Approach 2:
The patent replaces the mechanical position calculation system (double integration of acceleration) with an angular measurement system. Instead of integrating acceleration to get position, the system directly uses angle measurements from inertial sensors to define virtual trajectories, substituting a more accurate measurement approach for the flawed calculation approach.
3Loss of information
If camera sensors are used to record and replay swings, then club information can be acquired, but the user must manually draw the swing plane and high-speed cameras with markers are required for accurate wrist motion analysis
Solution Approach 1:
The patent introduces an intermediary computational model (virtual arm and club with standardized lengths) that mediates between the raw sensor data and the swing analysis. This virtual model serves as a bridge that translates inertial sensor angle measurements into standardized swing trajectories, eliminating the need for manual swing plane drawing and complex high-speed camera systems with markers.
Data Source
AI summary
The present invention relates to a method for analyzing the golf swing, and more specifically, to a method for analyzing the golf swing, which compares a swing angle of a user with a swing angle of a comparative model, and calculates lengths of the arm and a golf club based on a predefined specific arm length or a predefined specific club length, such that despite variations in the user's body size or club length, comparisons can be made using standardized arm and club lengths, thereby enabling more accurate golf swing analysis.