Projector Image Module Self-Calibration for Golf Hit Detection

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional indoor golf simulation apparatuses installed on ceilings are prone to installation deviations and require manual adjustment due to incorrect angles, necessitating a solution for automatic calibration of the image detection module to accurately determine golf ball hitting positions.

Innovation Solution

A projector apparatus with a projection lens, image detection module, drive module, and operation processor that automatically calibrates the image detection module using keystone correction technology, ToF sensors, and structured light sensors to adjust the detection angle based on captured feature patterns, eliminating the need for manual reinstallation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If the projector apparatus is installed on the ceiling for indoor golf simulation, then the area requirement is reduced, but installation deviation occurs leading to inaccurate detection

Engineering Contradiction:

Improvearea requirementVSAvoiddetection accuracy

Core Design Contradiction:

Area of stationary objectVSMeasurement precision

Solution Approach 1:

The system performs self-calibration by automatically detecting the projection area boundaries through the calibration pattern and computing correction parameters, eliminating the need for manual adjustment and ensuring accurate detection despite installation deviations

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system performs calibration before actual golf ball detection by projecting a calibration pattern, capturing images of the pattern, and pre-computing keystone correction parameters to ensure the detection module is properly aligned for subsequent use

Inventive Principle:

Principle #10Preliminary action

2Measurement precision

If manual adjustment is used to correct installation deviation, then detection accuracy can be improved, but the operation complexity and time consumption increase

Engineering Contradiction:

Improvedetection accuracyVSAvoidoperation complexity

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The system automatically performs calibration by detecting the calibration pattern, computing keystone correction parameters, and adjusting the detection module without requiring manual intervention, thereby maintaining high detection accuracy while simplifying operation

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system replaces manual mechanical adjustment with automated computational methods, using image processing and keystone correction algorithms to achieve precise alignment without physical repositioning of the detection module

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Measurement precision

If manual reinstallation is performed to correct installation deviation, then detection accuracy can be improved, but the time consumption increases

Engineering Contradiction:

Improvedetection accuracyVSAvoidtime consumption

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The system performs calibration as a preliminary step before actual detection by projecting a calibration pattern and pre-computing correction parameters, ensuring detection accuracy is established in advance without requiring time-consuming reinstallation

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system automatically performs calibration and correction parameter computation without requiring manual reinstallation, thereby achieving accurate detection while minimizing time consumption through automated processes

Inventive Principle:

Principle #25Self-service

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 and automatic alignment of the image detection module, ensuring precise determination of hitting positions without manual intervention, enhancing the accuracy and efficiency of indoor golf simulation systems.

Implementation Method 1

The image calibration module includes a ToF (Time of Flight) sensor, and the operation processor computes the calibration angle in accordance with a distance detection result of the ToF sensor

Methodology Applied

Scientific EffectTime of Flight: Time of Flight

Implementation Method 2

The image calibration module includes a structured light sensor, and the operation processor computes the calibration angle in accordance with a stripe deformation result of the structured light sensor

Methodology Applied

Scientific EffectLight deformation detection: Photography

Data Source

PatentUS20260059080A1Projector apparatus

Publication Date: 2026.02.26 BENQ CORP

AI summary

A projector apparatus of automatically calibrating position of an image detection module includes a projection lens, the image detection module, a drive module and an operation processor. The projection lens is used to project a feature pattern. The image detection module is disposed adjacent to the projection lens and used to acquire a detection image containing the feature pattern. The drive module is electrically connected to the image detection module. The operation processor is electrically connected to the projection lens, the image detection module and the drive module, and used to compare the detection image with a preset condition and then decide whether to adjust a detection angle of the image detection module via the drive module in accordance with a comparison result.