[PDF][PDF] A pragmatic introduction to signal processing

T O'Haver - University of Maryland at College Park, 1997 - researchgate.net
The interfacing of measurement instrumentation to small computers for the purpose of online
data acquisition has now become standard practice in the modern laboratory. Computerized …

Thermoelastic wave generation and its longitudinal wave propagation measurement by a microscopic optical interferometer

K Tamura, K Hashimoto, S Okawa - Ultrasonics, 2024 - Elsevier
Laser ultrasonics is a noncontact measurement method that uses a laser-induced elastic
wave source in combination with an optical surface displacement-tracking system. This …

Experimental Aerothermodynamics: Recent NASA Langley Capabilities and Contributions

ML Mason, SJ Rufer, BR Hollis, S Berry… - … FORUM AND ASCEND …, 2024 - arc.aiaa.org
A review is presented of recent research efforts that were conducted at the NASA Langley
Research Center in the Langley Aerothermodynamics Laboratory. An overview of the test …

Laser Speckle Pattern Stability in Hypersonic Regimes for Experimental Mechanics and Metrological Studies

LT Keene, JS Lum, E Busby, AC Rousso… - Experimental …, 2024 - Springer
An empirical study assessing the suitability of laser speckle patterns for use in experimental
mechanics research conducted at hypersonic conditions is presented. Speckle patterns …

A PGC demodulation scheme based on the Lissajous ellipse fitting for homodyne interferometer without using second harmonic carrier signal

L Zhang, W Xiao, W Fang - Applied Acoustics, 2024 - Elsevier
This paper proposes a phase generated carrier (PGC) demodulation scheme for sinusoidal
phase modulation interferometer (SPMI) that does not require a second harmonic carrier …

NASA LaRC Hypersonic Experimental Aerothermodynamic Capabilities and Recent Contributions

ML Mason, SJ Rufer, BR Hollis, SA Berry… - AIAA Aviation …, 2024 - ntrs.nasa.gov
A review is presented of recent research, development, testing and evaluation
aerothermodynamic activities that have been conducted at the NASA Langley Research …

In-Situ Laser-Based Ultrasonic Measurement of Material Cooling from Supersonic and Hypersonic Flow

JS Lum, B Goldberg, E Busby, D Stobbe… - AIAA AVIATION 2023 …, 2023 - arc.aiaa.org
View Video Presentation: https://doi. org/10.2514/6.2023-3299. vid In this study, we
demonstrate using laser-based ultrasonics as an in-situ measurement technique to …

[PDF][PDF] Optical Diagnostics Available in the Lawrence Livermore National Laboratory Energy Matter Interaction Tunnel (EMIT)

BM Goldberg, E Busby, R Shuttlesworth, JS Lum… - 2024 - osti.gov
The recently completed hypersonic test facility at LLNL has been purposefully built to enable
non-invasive optical diagnostics yielding simultaneous material and gas phase …