Size segregated aerosol mass concentration measurement device

Details Size segregated aerosol mass concentration measurement device Size segregated aerosol mass concentration measurement device

2011-04-26

2011-04-26

Souw, Bernard E (Department: 2881)

Radiant energy

Ionic separation or analysis

Ion beam pulsing means with detector synchronizing means

C250S299000, C073S028010, C073S028040, C073S030010, C073S335010, C356S438000, C356S439000

Reexamination Certificate

active

07932490

ABSTRACT:
An apparatus and method for estimating size segregated aerosol mass concentration in real time and using a single detector. A beam of electromagnetic radiation is passed through a particle stream made of a test or field aerosol. The single detector outputs an electrical signal proportional to the electromagnetic radiation scattered thereupon. The electrical signal may be conditioned to produce an integrated signal for measuring radiation scattered from all the particles in the interrogation volume, a pulse height from an individual particle within the volume, and/or a time-of-flight measurement from the individual particle. The integrated signal can be correlated to particle mass concentration. The pulse height signal and the time-of-flight signal may be converted to infer the size of the individual particle. Attendant size distributions for the particle sizes may also be obtained. Using known or assumed particle properties, the mass concentration may be estimated from the size distribution.

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