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A real time dynamic data acquisition and processing system for velocity, density, and total temperature fluctuation measurementsThe real time Dynamic Data Acquisition and Processing System (DDAPS) is described which provides the capability for the simultaneous measurement of velocity, density, and total temperature fluctuations. The system of hardware and software is described in context of the wind tunnel environment. The DDAPS replaces both a recording mechanism and a separate data processing system. DDAPS receives input from hot wire anemometers. Amplifiers and filters condition the signals with computer controlled modules. The analog signals are simultaneously digitized and digitally recorded on disk. Automatic acquisition collects necessary calibration and environment data. Hot wire sensitivities are generated and applied to the hot wire data to compute fluctuations. The presentation of the raw and processed data is accomplished on demand. The interface to DDAPS is described along with the internal mechanisms of DDAPS. A summary of operations relevant to the use of the DDAPS is also provided.
Document ID
19910008781
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Clukey, Steven J. (Vigyan Research Associates, Inc. Hampton, VA, United States)
Date Acquired
September 6, 2013
Publication Date
February 1, 1991
Subject Category
Air Transportation And Safety
Report/Patent Number
NASA-CR-182069
NAS 1.26:182069
Accession Number
91N18094
Funding Number(s)
PROJECT: RTOP 505-60-21-04
CONTRACT_GRANT: NAS1-18585
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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