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Optoelectronic Particle-Fallout SensorPortable optoelectronic system monitors fallout of small particles (dust and fibers) onto surface at given location during extended time. Data on accumulated fallout downloaded from system to computer for display and analysis. Typical display is plot of signal proportional to amount of accumulated fallout as function of time and read to determine when contamination occurs. In many cases, possible to establish correlations between accumulations of particles and activities in vicinity. Also capable of signaling alarm in event contamination by fallout exceeds specified level. System made very inexpensively and used to monitor accumulation of dust and fibers associated with motion of air in variety of environments. Phenomena monitored indirectly by use of system might include circulation of air in buildings, and human and animal activity. Also serves as auxiliary intrusion monitor (though probably not real-time alarm) in sealed room because motion of intruder inevitably stirs up some dust.
Document ID
19950065341
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Ihlefeld, Curtis
(NASA John F. Kennedy Space Center, Cocoa Beach, FL.)
Mogan, Paul A.
(NASA John F. Kennedy Space Center, Cocoa Beach, FL.)
Youngquist, Robert C.
(I-NET)
Moerk, John S.
(I-NET)
Haskell, William D.
(I-NET)
Cox, Robert B.
(I-NET)
Rose, Kenneth A.
(I-NET)
Date Acquired
August 17, 2013
Publication Date
April 1, 1995
Publication Information
Publication: NASA Tech Briefs
Volume: 19
Issue: 4
ISSN: 0145-319X
Subject Category
Electronic Systems
Report/Patent Number
KSC-11687
Accession Number
95B10182
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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