Optics: measuring and testing – For size of particles – By particle light scattering
Patent
1994-07-06
1995-01-17
Pham, Hoa Q.
Optics: measuring and testing
For size of particles
By particle light scattering
356342, 356 285, 356349, G01N 1502
Patent
active
053830245
ABSTRACT:
A wet steam monitor determines steam particle size by using laser doppler velocimeter (LDV) device to produce backscatter light. The backscatter light signal is processed with a spectrum analyzer to produce a visibility waveform in the frequency domain. The visibility waveform includes a primary peak and a plurality of sidebands. The bandwidth of at least the primary frequency peak is correlated to particle size by either visually comparing the bandwidth to those of known particle sizes, or by digitizing the waveform and comparing the waveforms electronically.
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Maxey Lonnie C.
Simpson Marc L.
Adams Harold W.
Martin Marietta Energy Systems Inc.
Pennington Edward A.
Pham Hoa Q.
Spicer James M.
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