Multi-Modal Inspection System for Additive Manufacturing Defect Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Additive manufacturing (AM) lacks real-time non-destructive evaluation (NDE) techniques to detect defects during the manufacturing process, leading to potential production of low-quality parts and material waste.
Innovation Solution
A real-time non-destructive inspection (NDI) system using multiple sensing modalities such as multi-angle imaging, scanning radial illumination, polarization imaging, speckle illumination, and spectral and temporal imaging is integrated into AM tools to detect defects in situ, providing immediate feedback for corrective action.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If real-time multi-modal inspection is implemented, then defect detection capability and part quality are improved, but device complexity increases
Solution Approach 1:
The patent combines multiple sensing modalities (multi-angle imaging, scanning radial illumination, polarization imaging, speckle illumination, and spectral/temporal imaging) into a single integrated inspection system. This merging approach enables comprehensive defect detection while managing system complexity through unified architecture.
Solution Approach 2:
The inspection system is designed to perform multiple functions simultaneously - detecting various defect types (voids, delaminations, inclusions) using different sensing modalities. This multi-functionality allows a single system to address diverse quality inspection needs without requiring separate dedicated systems for each defect type.
2Loss of substance
If real-time inspection is implemented, then material waste is reduced, but loss of time during inspection occurs
Solution Approach 1:
The inspection system performs real-time monitoring during the additive manufacturing process itself, detecting defects as they form. This preliminary detection allows for immediate corrective action before the entire part is completed, preventing waste of remaining material while minimizing interruption to the manufacturing process.
Solution Approach 2:
The system provides real-time feedback about defect detection during manufacturing, enabling dynamic adjustment of process parameters or immediate termination of defective builds. This feedback loop optimizes the balance between inspection time and material savings by allowing continued manufacturing when quality is acceptable.
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
This multi-modal approach ensures high-quality part production by detecting defects in real-time, reducing material waste and enabling real-time corrections, thereby enhancing the reliability and efficiency of the additive manufacturing process.
Implementation Method 1
multi-angle imaging
Implementation Method 2
scanning radial illumination imaging
Implementation Method 3
polarization imaging
Implementation Method 4
speckle illumination imaging
Implementation Method 5
spectral and temporal imaging
Data Source
AI summary
Additive manufacturing, such as laser sintering or melting of additive layers, can produce parts rapidly at small volume and in a factory setting. To ensure the additive manufactured parts are of high quality, a real-time non-destructive evaluation (NDE) technique is required to detect defects while they are being manufactured. The present invention describes an in-situ (real-time) inspection unit that can be added to an existing additive manufacturing (AM) tool, such as an FDM (fused deposition modeling) machine, or a direct metal laser sintering (DMLS) machine, providing real-time information about the part quality, and detecting flaws as they occur. The information provided by this unit is used to a) qualify the part as it is being made, and b) to provide feedback to the AM tool for correction, or to stop the process if the part will not meet the quality, thus saving time, energy and reduce material loss.