Advanced data acquisition and display techniques for laser velocimetryThe Basic Aerodynamics Research Tunnel (BART) has been equipped with state-of-the-art instrumentation for acquiring the data needed for code validation. This paper describes the three-component LDV and the workstation-based data-acquisition system (DAS) which has been developed for the BART. The DAS allows the use of automation and the quick integration of advanced instrumentation, while minimizing the software development time required between investigations. The paper also includes a description of a graphics software library developed to support the windowing environment of the DAS. The real-time displays generated using the graphics library help the researcher ensure the test is proceeding properly. The graphics library also supports the requirements of posttest data analysis. The use of the DAS and graphics libraries is illustrated by presenting examples of the real-time and postprocessing display graphics for LDV investigations.
Document ID
19910036813
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kjelgaard, Scott O. (NASA Langley Research Center Hampton, VA, United States)
Weston, Robert P. (NASA Langley Research Center Hampton, VA, United States)