About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Equipment, Instrumentation and In-Situ Process Monitoring
|
| Presentation Title |
Designing Sensor Systems for Anomaly and Flaw Detection in Laser Powder Bed Fusion Additive Manufacturing |
| Author(s) |
Luke Scime, Trevor McDonald, Frank Brinkley, Zackary Snow, Christopher Ledford, Vincent Paquit |
| On-Site Speaker (Planned) |
Luke Scime |
| Abstract Scope |
In this presentation we discuss the design process for an in-situ sensor system on a laser powder bed fusion printer. This system is capable of observing a wide range of anomalies and supporting the detection of certain types of flaws, such as spatter-induced lack-of-fusion pores. Topics will include camera optics, data acquisition and analysis hardware, network infrastructure, and the data acquisition software pipeline. To achieve high quality imaging, the pipeline begins with a flexible camera driver layer. Next, multiple cameras can be stitched into a single group to improve resolution for long-wave infrared imaging. Individual camera frames are stored in circular buffers to facilitate camera and light triggering and enable advanced pre-processing such as temporal integration of thermal emissions data. Finally, calibration procedures remove perspective distortion, non-linear distortions, and variations in diffuse reflected lighting conditions. This work is part of the Peregrine program. Developed at the Manufacturing Demonstration Facility, Peregrine is deployed at-the-edge for laser, electron beam, and binder jet printers across the DOE and DOD lab complex. |
