Laser velocimeter (autocovariance) buffer interface
James I. Clemmons, Langley Research Center, United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch
U.S. National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1981 - Technology & Engineering - 20 pages
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1.0-MHz output 16 BITS STATUS acquisition time clock blade position block diagram channel acquires data Clemmons Coincidence Circuit COINCIDENCE DATA ACQUISITION coincidence mode coincidence requirement coincident event Command/status computer interface section Computer to LVABI conditional sampling configured control and computer control circuit CONTROL CYCLE COUNTER DATA VALID data acquisition channels data acquisition cycle data acquisition mode data processing data storage data word data-valid pulse data-valid signal diagnostic data flow field halt and zero helicopter rotor high-speed burst counter instrument integrated circuits interarrival timing circuit interarrival-time measurement circuit interval Langley Research Center laser velocimeter autocovariance laser velocimeter data laser velocimeter high-speed LV counter LVABI Data LVABI to computer minicomputer msec NASA Tech Brief NMOS noncoincidence mode Nouismoov viva nsec power spectral density seeding particle shown in figure signal is received snivis system control two-component LV system usee vectorial velocimeter high-speed burst velocity data written into memory ysec