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1. WO2021058873 - APPARATUS AND METHOD FOR DETECTING PARTICLES

Publication Number WO/2021/058873
Publication Date 01.04.2021
International Application No. PCT/FI2020/050628
International Filing Date 24.09.2020
IPC
G01N 15/02 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
15Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
02Investigating particle size or size distribution
G01N 15/06 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
15Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
06Investigating concentration of particle suspensions
CPC
G01N 15/0211
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
15Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
02Investigating particle size or size distribution
0205by optical means, e.g. by light scattering, diffraction, holography or imaging
0211Investigating a scatter or diffraction pattern
G01N 15/065
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
15Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
06Investigating concentration of particle suspensions
065using condensation nuclei counters
G01N 2001/2223
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
1Sampling; Preparing specimens for investigation
02Devices for withdrawing samples
22in the gaseous state
2202involving separation of sample components during sampling
222Other features
2223aerosol sampling devices
G01N 2015/0038
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
15Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
0038Investigating nanoparticles
G01N 2015/0046
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
15Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
0042Investigating dispersion of solids
0046in gas, e.g. smoke
G01N 2015/0238
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
15Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
02Investigating particle size or size distribution
0205by optical means, e.g. by light scattering, diffraction, holography or imaging
0238Single particle scatter
Applicants
  • AIRMODUS OY [FI]/[FI]
Inventors
  • ENROTH, Joonas
Agents
  • BERGGREN OY
Priority Data
2019580124.09.2019FI
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) APPARATUS AND METHOD FOR DETECTING PARTICLES
(FR) APPAREIL ET PROCÉDÉ DE DÉTECTION DE PARTICULES
Abstract
(EN)
A method for detecting particles, the method comprising at least providing a sample flow comprising particles, providing the sample flow with a saturating agent, directing at least a portion of said sample flow to an expansion chamber, sealing at least the expansion chamber from the environment, and increasing a pressure inside at least the expansion chamber from a first pressure to a second, higher pressure. The method additionally comprises decreasing the pressure inside at least the expansion chamber from the second pressure to the first pressure to produce activated particles by inducing supersaturation of the saturating agent and thus condensation of the saturating agent onto the particles of the sample flow to increase the size of selected particles from a first size to a second size, unsealing at least the expansion chamber, directing the sample flow comprising the activated particles of second size from the expansion chamber to a detector, and detecting at least an amount of single activated particles in the sample flow.
(FR)
La présente invention concerne un procédé de détection de particules, le procédé comprenant au moins la fourniture d’un flux d’échantillon comprenant des particules, la fourniture au flux d’échantillon d’un agent de saturation, le guidage d’au moins une partie dudit flux d’échantillon vers une chambre de détente, le scellement d’au moins la chambre de détente par rapport à l’environnement, et l’augmentation d’une pression à l’intérieur d’au moins la chambre de détente qui passe d’une première pression à une deuxième pression plus élevée. Le procédé comprend en outre la diminution de la pression à l’intérieur d’au moins la chambre de détente qui passe de la deuxième pression à la première pression pour produire des particules activées par induction d’une sursaturation de l’agent de saturation et ainsi la condensation de l’agent de saturation sur les particules du flux d’échantillon pour augmenter la taille de particules sélectionnées qui passe d’une première taille à une deuxième taille, le déscellement d’au moins la chambre de détente, le guidage du flux d’échantillon comprenant les particules activées de deuxième taille de la chambre de détente vers un détecteur, et la détection d’au moins une quantité de particules activées individuelles dans le flux d’échantillon.
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