Stereoscopic Golf Swing Sensor Trajectory Analysis
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Solution Overview
Problem
Existing sensing devices for golf swings struggle to accurately determine the impact position of a golf ball on the club head due to the risk of sensor damage and the difficulty in calculating the exact impact position, as the size of the golf ball appears larger than actual on camera images and the club head's orientation differs from the camera's perspective.
Innovation Solution
A sensing device utilizing two cameras operated in a stereoscopic manner to capture images of the golf ball and club from different locations, with a sensing processor analyzing these images to calculate the impact position by determining the first and second positions from the club trajectories and ball positions, and calculating the impact position using vertical distances from the center points to the club trajectories.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a camera sensor is installed in the direction of the golf club head to capture impact images, then the impact position can be monitored, but the risk of sensor damage by the golf club or golf ball is too high
Solution Approach 1:
The patent introduces an intermediary calculation approach where the impact position is not directly captured by a sensor near the club head, but rather calculated by analyzing the trajectories of the club head and ball from remote camera positions. This mediator (trajectory analysis algorithm) allows accurate impact position determination without placing sensors in the dangerous zone near the club head, thus resolving the contradiction between measurement precision and sensor safety.
2Device complexity
If a single camera is used to capture the golf ball and club head, then the setup is simple, but the size of the golf ball appears much larger than actual and the impact position cannot be calculated accurately
Solution Approach 1:
The patent transitions from a single-camera 2D view to a multi-camera 3D stereoscopic system. By adding spatial dimensions through multiple camera positions, the system can calculate accurate impact positions on the club head face. The multiple cameras capture images from different angles, enabling three-dimensional coordinate calculation that corrects the perspective distortion problem inherent in single-camera systems.
3Reliability
If prediction methods using club trajectory and ball flight data are used, then the sensing device can operate safely at a distance, but accurate impact position information cannot be obtained
Solution Approach 1:
The patent replaces the mechanical approach of placing physical sensors near the club head with an optical-field approach using multiple cameras and trajectory analysis. Instead of directly measuring impact position with a mechanical sensor in contact with the club, the system uses optical fields from remote cameras to capture club and ball trajectories, then substitutes mathematical calculation to derive the impact position, achieving both safety and accuracy.
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
Enables accurate calculation of the impact position on the club head, overcoming the limitations of previous devices by using stereoscopic imaging to provide precise data on the golf ball's impact location during a golf swing.
Implementation Method 1
a first and a second cameras each of which acquires at different locations in a field of view including the golf ball and the golf club and operated in a stereoscopic manner
Data Source
AI summary
The present invention is to provide a device for sensing golf swing and a method for sensing an impact position on club head using two cameras operated in a stereoscopic manner with each other in the sensing device to accurately calculate the position where the golf ball is impacted on the head-face of the golf club when hitting the golf ball.