公开(公告)号：US09638665B2

公开(公告)日：2017-05-02

申请号：US14898934

申请日：2014-06-17

Applicant: PARTICLE MEASURING SYSTEMS, INC.

Inventor： Boris Zachar Gorbunov

IPC: G01N15/10 ,  G01N15/02 ,  G01N27/62

CPC classification number: G01N27/622 ,  G01N1/2202 ,  G01N15/0255 ,  G01N15/0266 ,  G01N15/10 ,  G01N2001/2223 ,  G01N2015/0038 ,  G01N2015/0046 ,  G01N2015/0288 ,  G01N2015/1087

Abstract: The invention provides a method for obtaining aerosol particle size distributions with a scanning mobility particle sizer (SMPS) device comprising a differential mobility analyzer (DMA); which method comprises the stages: (i) collecting a first data set of particle concentrations vs. size for a size range from a predetermined minimal size Dmin to an intermediate size Dt by varying a voltage applied to a DMA column of an SMPS from Vmin to Vt1 at a first sheath flow rate Qsh1; (ii) changing the sheath flow rate from the first sheath flow rate Qsh1 to a second sheath flow rate Qsh2; (iii) collecting a second data set of particle concentrations vs. size for a size range from the intermediate size Dt to a predetermined maximum size Dmax by varying the voltage applied to the DMA column of the SMPS from Vt2 to Vmax at the second sheath flow rate Qsh2; (iv) convolving the first data set from stage (i) using an apparatus function of the DMA and the sheath flow rates Qsh1 and Qsh2 in stage (ii); (v) combining the convolved data set from stage (iv) with the second data set from stage (iii) to form a merged data set corresponding to the size distribution from Dmin to Dmax; and (vi) deconvolving the merged data set to provide a size distribution for the full size range Dmin to Dmax. Also provided are a DMA, SMPS or Fast Mobility Particle Sizer (FMPS) apparatus set up to perform the method.

公开(公告)号：US10792694B2

公开(公告)日：2020-10-06

申请号：US15867672

申请日：2018-01-10

Applicant: PARTICLE MEASURING SYSTEMS INC.

Inventor： Boris Zachar Gorbunov ,  Harald Wilhelm Julius Gnewuch

IPC: B05C3/00 ,  G01N15/02 ,  B01D5/00 ,  G01N15/06 ,  B05C3/02 ,  G01N33/00 ,  G01N15/00

Abstract: Apparatuses for increasing the effective size of gas-entrained particles in a particle detector are disclosed. In one embodiment, an apparatus comprises an evaporation chamber, a condenser in fluid communication with the evaporation chamber, and an inlet in fluid communication with the condenser for receiving a stream of sample gas containing gas-entrained particles. The evaporation chamber includes a heating element and a porous support surrounding the heating element. The porous support carries thereon a working fluid, and the heating element vaporizes the working fluid to form vapor within the evaporation chamber. The porous support may include a portion which extends into a working fluid reservoir.