Golf Swing Practice Machine With Optical Impact Sensing

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Solution Overview

Problem

Existing golf swing practice machines struggle to accurately recognize the moment of impact and provide comprehensive swing element information without the golfer striking a golf ball, and they have limitations in adjusting golf ball and feet positions based on club types.

Innovation Solution

A golf swing practice machine that combines light sensors and an IMU sensor to measure club speed, face angle, and other swing elements, using a virtual golf ball setup with slit beams to detect backswing and impact, and an application to analyze and display swing data.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If a moving body is mounted on a practice club to generate a strike sound, then the golfer can practice swing speed, but the moment of impact cannot be accurately recognized

Engineering Contradiction:
Improveimpact moment recognitionVSAvoidimpact detection accuracy
Core Design Contradiction:
Loss of informationVSMeasurement precision

Solution Approach 1:

The patent replaces the mechanical strike sound generation system with an optical sensing system using light transmitters and receivers. The light-based system detects the moment of impact by measuring changes in light transmission when the club head passes through the light beam, providing precise impact moment recognition without relying on acoustic signals.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces light beams as an intermediary medium between the club head and the detection system. The light beams serve as a mediator that interacts with the moving club head during the swing, allowing indirect but accurate measurement of swing elements including impact moment, club speed, and trajectory without direct mechanical contact.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Loss of information

If acceleration sensors are attached to the club shaft to analyze swing trajectory, then swing path can be measured, but comprehensive impact information is still missing

Engineering Contradiction:
Improvecomprehensive swing element informationVSAvoidsensor system complexity
Core Design Contradiction:
Loss of informationVSDevice complexity

Solution Approach 1:

The patent merges multiple sensing functions into a unified optical sensing system. By combining light transmitters, light receivers, and IMU sensors into an integrated system, the invention simultaneously measures multiple swing elements (impact moment, club speed, face angle, trajectory) without requiring separate complex sensor assemblies for each measurement.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The optical sensing system serves multiple functions: detecting impact moment, measuring club speed, determining trajectory, and analyzing face angle. This multi-functional approach eliminates the need for separate specialized sensors for each measurement, reducing overall system complexity while providing comprehensive swing analysis.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Object-affected harmful factors

If a golfer directly strikes a golf ball to practice, then accurate impact information is obtained, but safety devices are required in small indoor spaces

Engineering Contradiction:
Improvesafety risk in indoor practiceVSAvoidimpact moment recognition
Core Design Contradiction:
Object-affected harmful factorsVSMeasurement precision

Solution Approach 1:

The patent creates a virtual practice environment using optical sensors and light beams that replicates the impact detection function of actual golf ball striking. The system measures club head velocity and trajectory through light beam interruption, providing accurate impact information without requiring physical golf balls, thereby eliminating safety hazards in indoor spaces.

Inventive Principle:
Principle #26Copying

Solution Approach 2:

The light beams serve as an intermediary that replaces the golf ball in the impact detection process. Instead of the club head directly contacting a physical ball, the system uses light transmission changes as a mediator to detect and measure the impact moment and club characteristics, eliminating the need for physical balls and associated safety concerns.

Inventive Principle:
Principle #24Intermediary (Mediator)

4Ease of operation

If conventional practice machines use a net type bag for ball striking, then swing practice is enabled, but the machines cannot be used in small indoor spaces and require travel to practice facilities

Engineering Contradiction:
Improveconvenience of practice locationVSAvoidspace requirement for practice machine
Core Design Contradiction:
Ease of operationVSArea of stationary object

Solution Approach 1:

The patent extracts the essential measurement function from the physical golf ball and net system, isolating the core capability of impact detection and swing analysis. By removing the requirement for physical balls, nets, and large practice areas, the system can be implemented in compact indoor spaces while maintaining accurate swing measurement capabilities.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent transitions from a physical, space-consuming practice system to an optical, space-efficient system. By moving from three-dimensional physical objects (balls, nets, large machines) to optical fields and electronic sensing, the system achieves the same measurement function in a dramatically reduced physical footprint, enabling indoor practice in small spaces.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

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 recognition of the impact moment and provides detailed swing information, allowing adjustments for different club types, improving swing practice without the need for direct ball striking, and simulating real club conditions.

Implementation Method 1

a light transmitter and a light receiver to sense a moment of impact

Methodology Applied
Scientific EffectLight detection: Photoelectric Effect

Implementation Method 2

an acceleration sensor and a gyroscope sensor disposed at given positions of the club part to determine position information of the club part

Methodology Applied
Scientific EffectAcceleration sensing: Accelerometer

Implementation Method 3

an acceleration sensor and a gyroscope sensor disposed at given positions of the club part to determine position information of the club part

Methodology Applied
Scientific EffectGyroscope effect: Gyroscope

Data Source

PatentUS12605594B2Golf swing practice machine
Publication Date: 2026.04.21 DMBH CO LTD
  • US12605594B2 patent drawing
  • US12605594B2 patent drawing
  • US12605594B2 patent drawing

AI summary

According to the present invention, a golf swing practice machine is provided, the golf swing practice machine including: a club part (100) which enables a golfer to take a swing; a bottom part (200) on which a golf ball to be struck by a swing of the club part is placed; and an application (300) which may evaluate the state of the club part or select the type of a practice club when the golf ball placed on the bottom part (200) is struck, and thus, a swing state of the club part (100) may be analyzed.