Golf Putter Inertial Sensor Motion Analysis
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Solution Overview
Problem
Current motion analysis systems for golf putters using inertial sensors fail to effectively reproduce directionality and perception of distance, lacking comprehensive feedback on swing accuracy and consistency.
Innovation Solution
A motion analysis method and apparatus that utilizes inertial sensors to specify the angle and speed of the hitting surface during impact, displaying these parameters in a coordinate system with the hitting target direction, allowing users to visualize and quantify deviations for improved practice and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a camera is not used and only inertial sensors are employed, then convenience is improved, but the ability to accurately reproduce directionality and perception of distance deteriorates
Solution Approach 1:
The patent combines multiple inertial sensors (acceleration sensors and gyro sensors) into an integrated sensor unit attached to the golf club. This merging of sensors allows the system to capture both linear acceleration and angular velocity data, enabling accurate reconstruction of swing trajectory and club head orientation without requiring external cameras or complex equipment setup.
Solution Approach 2:
The system provides real-time feedback by processing sensor data to calculate swing parameters such as club head speed, impact angle, and trajectory. The processed information is displayed to the user, allowing them to immediately adjust their technique. This closed-loop feedback mechanism compensates for the limitations of using only inertial sensors by enabling continuous refinement of measurement accuracy through user adaptation.
2Measurement precision
If hitting direction is specified based on movement trajectory, then accurate hitting direction is obtained, but the complexity of specifying target direction increases
Solution Approach 1:
The system pre-calculates and stores the relationship between sensor orientation and hitting direction before actual use. The sensor unit is calibrated during setup to establish the initial orientation, and this reference information is used to automatically determine target direction during swing analysis. This preliminary calibration eliminates the need for complex real-time calculations of target direction during actual swinging.
Solution Approach 2:
The patent introduces an intermediate coordinate system that bridges the sensor reference frame and the swing analysis frame. The sensor data is first transformed into this intermediate coordinate system, which then serves as a mediator to calculate the final hitting direction relative to the target. This intermediate representation simplifies the mathematical transformations and reduces computational complexity.
Data Source
AI summary
A motion analysis apparatus includes an impact analysis unit that specifies a hitting direction of an exercise appliance during impact and a speed of the exercise appliance during the impact by using an output signal from an inertial sensor, and a display unit that displays the hitting direction and the speed in a coordinate system in which a hitting target direction is set.