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公开(公告)号：US20230280254A1
公开(公告)日：2023-09-07
申请号：US18160948
申请日：2023-01-27
Applicant: Aerosol Dynamics Inc. , Washington University
Inventor： Jian Wang , Steven Russel Spielman , Jiaoshi Zhang , Susanne Vera Hering , Jing Li
CPC classification number: G01N15/0266 , G01N1/2202 , G01N2001/2223
Abstract: A system and method to measure a size distribution of particles based on their electrical mobility. The method includes: introducing, via a sheath flow inlet, a particle free sheath flow into a chamber formed by two parallel walls which are separated by a gap, the chamber having a width and a length, the sheath flow having a direction along the length of the chamber and flowing a laminar manner; introducing an aerosol sample flow into the chamber downstream of the sheath inlet such that the aerosol sample flow joins the particle free sheath flow in a laminar manner; applying an electric field between the two parallel walls of the chamber, the field having a strength which varies across the width of the chamber; extracting an output aerosol flow through a first outlet downstream of the sample inlet; and outputting an excess flow equal to a sum of the sheath flow and aerosol sample flow minus the output aerosol flow. The method may also include: passing the output aerosol flow through a growth cell in a laminar manner, the growth cell having a region of wetted walls with two or more temperature regions such that the particles within the output aerosol flow grow by condensation to form droplets, and such that relative positions of droplets are indicative of particle electrical mobility; and counting and capturing a spatial position of individual droplets exiting the growth cell.
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公开(公告)号：US20220026333A1
公开(公告)日：2022-01-27
申请号：US17494449
申请日：2021-10-05
Applicant: Aerosol Dynamics Inc.
Inventor： Susanne Vera Hering , Gregory Stephen Lewis , Steven Russel Spielman
IPC: G01N15/06
Abstract: A method and apparatus to create water vapor supersaturation and particulate counts from an air sample. The method and apparatus include introducing an air sample into a chamber by passing a flow into the chamber through the inlet by pumping at the outlet. The method further includes closing the inlet while continuing the pumping to exhaust the air sample from the chamber through the outlet. The pumping is performed at a rate operable to reduce pressure inside the chamber such that the air sample in the central portion of the chamber cools, and water vapor from walls of the chamber has time to diffuse into the air sample in the chamber from the walls. The cycles are repeated by continuously repeating the introducing and closing. The walls of the chamber may be wet or dry.
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公开(公告)号：US20150024379A1
公开(公告)日：2015-01-22
申请号：US14378768
申请日：2013-02-19
Applicant: RESEARCH TRIANGLE INSTITUTE , AEROSOL DYNAMICS INC.
Inventor： David S. Ensor , Howard Jerome Walls , Karin K. Foarde , Susanne Vera Hering , Steven Russel Spielman
IPC: C12Q1/24
CPC classification number: C12Q1/24
Abstract: An aerosol collection system and method. The system includes a bio-aerosol delivery device configured to supply bioparticles in a gas stream, a moisture exchange device including a partition member coupled to the gas stream and configured to humidify or dehumidify the bioparticles in the gas stream, and an aerosol collection medium downstream from the moisture exchange device and configured to collect the bioparticles. The method includes delivering bioparticles in a gas stream, humidifying or dehumidifying the bioparticles in the gas stream by transport of water across a partition member and into a vapor phase of the gas stream, and collecting the bioparticles by a collection medium.
Abstract translation: 气溶胶收集系统及方法。 该系统包括构造成供应气流中的生物颗粒的生物气溶胶输送装置，水分交换装置，其包括耦合到气流的分隔构件，并被配置为对气流中的生物颗粒进行加湿或除湿;以及下游的气溶胶收集介质 从湿度交换装置并配置成收集生物颗粒。 该方法包括在气流中输送生物颗粒，通过将水输送通过分隔构件并进入气流的气相来加湿或除湿气流中的生物颗粒，以及通过收集介质收集生物颗粒。
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公开(公告)号：US12105002B2
公开(公告)日：2024-10-01
申请号：US17492955
申请日：2021-10-04
Applicant: Aerosol Dynamics Inc.
Inventor： Susanne Vera Hering , Gregory Stephen Lewis , Steven Russel Spielman
IPC: G01N15/06 , G01N15/075
CPC classification number: G01N15/065 , G01N15/06 , G01N15/075
Abstract: A method and apparatus to create water vapor supersaturation and particulate counts from an air sample. The method and apparatus include introducing an air sample into a chamber by passing a flow into the chamber through the inlet by pumping at the outlet. The method further includes closing the inlet while continuing the pumping to exhaust the air sample from the chamber through the outlet. The pumping is performed at a rate operable to reduce pressure inside the chamber such that the air sample in the central portion of the chamber cools, and water vapor from walls of the chamber has time to diffuse into the air sample in the chamber from the walls. The cycles are repeated by continuously repeating the introducing and closing. The walls of the chamber may be wet or dry.
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公开(公告)号：US11305138B2
公开(公告)日：2022-04-19
申请号：US17290216
申请日：2019-10-31
Applicant: TSI Incorporated , Aerosol Dynamics Inc.
Inventor： Daniel C. Bjorkquist , Arantzazu Eiguren Fernandez , Kenneth Farmer , Melissa Grose , Susanne Vera Hering , Gregory Stephen Lewis , Steven Russel Spielman , David Workman
Abstract: A system includes a first and second condensation particle counter, each counter having an inlet port, a growth column, and an optical element for counting particles detected at the respective inlet ports. The counters are configured to include a wick in which the wick is wetted by water. A differential pressure sensor is coupled to the first inlet port and coupled to the second inlet port. The sensor is configured to provide a pressure signal. A processor is coupled to memory and configured to receive the first signal, the second signal, and the pressure signal and generate an output corresponding to a ratio of the first signal and the second signal and correlate the ratio with the pressure signal. A housing is configured to receive the first counter, the second counter, the differential pressure sensor, the processor, and the memory.
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Patent Agency Ranking
公开(公告)号：US20220026332A1
公开(公告)日：2022-01-27
申请号：US17492955
申请日：2021-10-04
Applicant: Aerosol Dynamics Inc.
Inventor： Susanne Vera Hering , Gregory Stephen Lewis , Steven Russel Spielman
IPC: G01N15/06
Abstract: A method and apparatus to create water vapor supersaturation and particulate counts from an air sample. The method and apparatus include introducing an air sample into a chamber by passing a flow into the chamber through the inlet by pumping at the outlet. The method further includes closing the inlet while continuing the pumping to exhaust the air sample from the chamber through the outlet. The pumping is performed at a rate operable to reduce pressure inside the chamber such that the air sample in the central portion of the chamber cools, and water vapor from walls of the chamber has time to diffuse into the air sample in the chamber from the walls. The cycles are repeated by continuously repeating the introducing and closing. The walls of the chamber may be wet or dry.
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公开(公告)号：US20210316175A1
公开(公告)日：2021-10-14
申请号：US17290216
申请日：2019-10-31
Applicant: TSI INCORPORATED , Aerosol Dynamics Inc.
Inventor： Daniel C. Bjorkquist , Arantzazu Eiguren Fernandez , Kenneth Farmer , Melissa Grose , Susanne Vera Hering , Gregory Stephen Lewis , Steven Russel Spielman , David Workman
Abstract: A system includes a first and second condensation particle counter, each counter having an inlet port, a growth column, and an optical element for counting particles detected at the respective inlet ports. The counters are configured to include a wick in which the wick is wetted by water. A differential pressure sensor is coupled to the first inlet port and coupled to the second inlet port. The sensor is configured to provide a pressure signal. A processor is coupled to memory and configured to receive the first signal, the second signal, and the pressure signal and generate an output corresponding to a ratio of the first signal and the second signal and correlate the ratio with the pressure signal. A housing is configured to receive the first counter, the second counter, the differential pressure sensor, the processor, and the memory.
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公开(公告)号：US10882018B2
公开(公告)日：2021-01-05
申请号：US16372677
申请日：2019-04-02
Applicant: AEROSOL DYNAMICS INC.
Inventor： Susanne Vera Hering , Steven Russel Spielman , Gregory Stephen Lewis
Abstract: An apparatus and method for creating enlarged particles in a flow. The apparatus includes a coiled tube having a tube diameter and a coil diameter, the tube having an input receiving the flow and an output, the tube having a length between the input and the output. A heater heats a first portion of the tube along a first, longitudinal portion of the tube, and a cooler cools a second, longitudinal portion of the tube along at least a second portion of the tube. The method includes heating a first portion of the tube along a first longitudinal portion of the tube, and simultaneously cooling a second portion of the tube along at least a second longitudinal portion of the tube. While heating and cooling, the method includes introducing a flow into an interior of the tube at an input, the flow moving the output.
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公开(公告)号：US20190226968A1
公开(公告)日：2019-07-25
申请号：US16372643
申请日：2019-04-02
Applicant: AEROSOL DYNAMICS INC.
Inventor： Susanne Vera Hering , Steven Russel Spielman , Gregory Stephen Lewis
Abstract: An apparatus and method for condensationally enlarging particles in a flow of air or other gas. The apparatus includes a coiled tube having a tube diameter and a coil diameter, the tube having an input receiving the flow and an output, the tube having a length between the input and the output. The walls of the tube are wetted with a condensing fluid. The walls of the first portion of the coiled tube are held a temperature that is lower than the highest temperature in the second portion of the tube. The tube may have a third vapor recovery portion with wall temperature lower than the highest temperature in the second portion, and which optionally may not be coiled. While heating and cooling, the method includes introducing a flow into an interior of the tube at an input, the flow moving the output.
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公开(公告)号：US10252237B2
公开(公告)日：2019-04-09
申请号：US14886661
申请日：2015-10-19
Applicant: Aerosol Dynamics Inc.
Inventor： Susanne Vera Hering , Steven Russel Spielman , Gregory Stephen Lewis
Abstract: An apparatus and method for creating enlarged particles in a flow. The apparatus includes a coiled tube having a tube diameter and a coil diameter, the tube having an input receiving the flow and an output, the tube having a length between the input and the output. A heater heats a first portion of the tube along a first, longitudinal portion of the tube, and a cooler cools a second, longitudinal portion of the tube along at least a second portion of the tube. The method includes heating a first portion of the tube along a first longitudinal portion of the tube, and simultaneously cooling a second portion of the tube along at least a second longitudinal portion of the tube. While heating and cooling, the method includes introducing a flow into an interior of the tube at an input, the flow moving the output.
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