Golf Swing Analysis Using Double Pendulum Model
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Solution Overview
Problem
Existing golf swing analysis methods require large-scale measurement devices that impede natural movement and provide less accurate analysis, and traditional golf club fitting methods rely on practice hits and measurement of swing action, which can be inefficient in determining optimal swingability.
Innovation Solution
A golf swing analysis apparatus and method that models the swing action using a double pendulum model without a large-scale measurement device, deriving grip and shoulder behavior using acceleration and angular velocity sensors attached to the golf club, and calculates swing indices like head speed and torque exertion to evaluate the swing and specify optimal swingability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If large-scale measurement devices are used to measure swing action at multiple sites, then measurement accuracy is improved, but the measurement device becomes large scale and impedes natural movement
Solution Approach 1:
The invention extracts the measurement function from large-scale multi-site measurement devices and concentrates it into a single small sensor attached to the golf club. By measuring only the grip behavior and deriving shoulder behavior through the double pendulum model, the system eliminates the need for multiple sensors on the golfer's body, thus reducing device scale while maintaining measurement accuracy.
Solution Approach 2:
The double pendulum model serves as an intermediary that connects the measurable grip behavior with the unmeasured shoulder behavior. Instead of directly measuring shoulder movement with sensors, the system uses the mathematical model to derive shoulder behavior from grip sensor data, eliminating the need for additional measurement devices.
2Measurement precision
If multiple measurement devices are attached to the golfer's body to measure swing action, then swing analysis accuracy is improved, but natural movement is impeded
Solution Approach 1:
The invention removes measurement devices from the golfer's body and places only a single sensor on the golf club grip. This extraction eliminates the physical burden and restriction on the golfer's natural movement while maintaining analysis accuracy through mathematical modeling of the double pendulum system.
Solution Approach 2:
The system allows the golfer to perform natural swing movements without external interference from body-mounted sensors. The measurement system serves itself by using the golf club as the measurement platform, eliminating the need for the golfer to wear or carry additional equipment that would restrict movement.
3Reliability
If traditional fitting methods use practice hits with measurement, then golf club selection is improved, but time consumption increases
Solution Approach 1:
The system performs preliminary analysis by calculating swingability index from a single swing measurement using the double pendulum model. This preliminary result provides immediate guidance for golf club selection, reducing the need for multiple practice hits and extending the fitting process over a shorter time period while maintaining selection reliability.
Data Source
AI summary
A golf swing analysis apparatus for analyzing a swing action of a golf club is provided. The golf swing analysis apparatus comprises an acquisition unit configured to acquire a measurement value obtained by measuring the swing action using a measurement device; a grip behavior derivation unit configured to derive a behavior of a grip of the golf club that occurs during the swing action, based on the measurement value; and a shoulder behavior derivation unit configured to derive a behavior of a pseudo shoulder of a golfer that occurs during the swing action, based on the behavior of the grip.