Title:
NUMBER BASED PARTICLE DIAMETER DISTRIBUTION MEASUREMENT METHOD AND MEASUREMENT SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/235169
Kind Code:
A1
Abstract:
Provided are a method capable of promptly and easily measuring a particle diameter distribution based on the number of particles having a distribution within a wide particle diameter range from a nanometer size to a micrometer size, and a measurement system. Provided are a measurement method comprising emitting a laser beam over microparticles undergoing Brownian motion in a dispersion medium, imaging bright spots due to scattered light at certain time intervals, and, from a movement trajectory of the bright spots in a thus obtained image, measuring the particle diameter and number of microparticles so as to measure a number based particle diameter distribution, and a measurement system therefor. Microparticles dispersed in a dispersion medium are provided with a flow field in the dispersion medium, arranged, and classified in the dispersion medium in accordance with the particle diameter, and a laser beam is emitted over the dispersion medium containing the classified microparticles to obtain an image. Prior to such imaging, the dispersion medium is divided so as to contain microparticles within a certain particle diameter range, and the number concentration is adjusted without changing the number of microparticles in each divided dispersion medium.
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Inventors:
KATO HARUHISA (JP)
Application Number:
PCT/JP2021/016368
Publication Date:
November 25, 2021
Filing Date:
April 22, 2021
Export Citation:
Assignee:
AIST (JP)
International Classes:
G01N15/02
Domestic Patent References:
| WO2009131175A1 | 2009-10-29 | |||
| WO2016159131A1 | 2016-10-06 |
Foreign References:
| JP2002221479A | 2002-08-09 | |||
| JPH0915136A | 1997-01-17 | |||
| JP2000002644A | 2000-01-07 | |||
| JP2014021060A | 2014-02-03 | |||
| JP2001074637A | 2001-03-23 | |||
| JP2010127790A | 2010-06-10 | |||
| JP2012037318A | 2012-02-23 |
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