Hybrid Light Measurement Method for 3D Profiling
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Solution Overview
Problem
Current three-dimensional measurement methods face limitations in measuring highly reflective surfaces and require separate systems for laser stripe and fringe pattern measurements, leading to reduced measurement efficiency and accuracy.
Innovation Solution
A hybrid light measurement method combining laser stripe and fringe pattern measurements using MEMS projection technology, which adapts to surface reflectivity characteristics and performs synchronized scanning and processing to achieve three-dimensional reconstruction without additional hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fringe pattern method is used for three-dimensional measurement, then measurement range and accuracy are improved, but highly reflective surfaces cannot be measured due to non-uniform reflectivity
Solution Approach 1:
The patent dynamically switches between fringe pattern measurement mode and laser stripe measurement mode based on the reflectivity characteristics of the object surface. The system adapts its measurement approach in real-time, selecting the appropriate method for each local region to ensure both accuracy and versatility across different surface types.
Solution Approach 2:
The patent changes the measurement parameters by switching between different measurement modes (fringe pattern vs. laser stripe) depending on the optical properties of the surface. This parameter change allows the system to handle both highly reflective and non-reflective surfaces effectively, resolving the contradiction between measurement accuracy and measurement range.
2Adaptability or versatility
If laser stripe measurement is used, then highly reflective surfaces can be measured, but measurement efficiency is reduced due to motion mechanism requirements
Solution Approach 1:
The patent merges fringe pattern measurement and laser stripe measurement into a single hybrid system. By combining the advantages of both methods and implementing adaptive mode switching, the system achieves both high measurement efficiency (from fringe pattern method) and the ability to measure highly reflective surfaces (from laser stripe method), eliminating the need for separate measurement systems.
Solution Approach 2:
The patent creates a universal measurement system that can handle both highly reflective surfaces and general surfaces through multi-functionality. The system incorporates both fringe pattern projection capability and laser stripe scanning capability, allowing it to adapt to different measurement requirements and achieve both efficiency and versatility.
3Measurement precision
If separate measurement systems are used for fringe pattern and laser stripe measurements, then each method can be optimized, but system complexity and measurement time increase
Solution Approach 1:
The patent merges two separate measurement systems (fringe pattern system and laser stripe system) into a single integrated hybrid measurement system. This merging reduces system complexity by eliminating redundant components while maintaining the measurement capabilities of both methods through adaptive mode switching based on surface reflectivity characteristics.
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 precise and efficient three-dimensional profiling of objects with different surface properties by integrating laser stripe and fringe pattern measurements into a single system, improving measurement speed and accuracy.
Implementation Method 1
emitting, by a projection device, a synchronization signal to trigger the camera to capture a sequence of laser stripe images reflected by the surface of the object
Data Source
AI summary
A hybrid light measurement method for measuring a three-dimensional profile comprises: Step 1 using a MEMS laser projector to realize projection of a laser stripe and a fringe pattern: and Step 2 performing matching to obtain a parallax, and incorporating a binocular stereo vision to perform reconstruction. The present disclosure employs MEMS projection technology to realize a hybrid measurement system capable of performing laser stripe measurement and fringe pattern measurement, thereby realizing quick measurement of three-dimensional profiles of objects having different surface properties. The present disclosure enables laser stripe measurement and fringe pattern measurement to be performed by the same measurement system without needing any additional hardware equipment. The projection device used in the present disclosure enables projection of multiple laser stripes, thereby increasing measurement precision and speed.