Measuring and testing – Particle size
Reexamination Certificate
2007-02-07
2009-10-13
Williams, Hezron (Department: 2856)
Measuring and testing
Particle size
Reexamination Certificate
active
07600441
ABSTRACT:
A comprehensive particulate matter measurement system (CPMMS) that measures accurate mass size distribution of particulate matter (PM) in ambient air, and a method to measure the accurate mass size distribution of PM are provided. The CPMMS includes a mass-based PM sampler, a particle sizing device, and an analysis system that manipulates data sent from the mass-based PM sampler and the particle sizing device to accurately measure mass size distribution of PM. The mass-based PM sampler measures total mass concentration of PM, and the particle sizing device measures size or volume size distribution of PM. Estimated total mass concentration is obtained from the size distribution predicting an assumed density of PM, and is compared with the actual total mass concentration measured by the mass-based PM sampler. A correct density of PM can be obtained from the actual total mass concentration, and as a result, accurate mass size distribution can be obtained.
REFERENCES:
patent: 3628139 (1971-12-01), Huber
Bushnell , Esq. Robert E.
Devito Alex
Providence Engineering and Environmental Group LLC
Williams Hezron
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