Title:
PARTICLE CHARGING DEVICE AND PARTICLE CLASSIFICATION DEVICE USING SAID CHARGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/002647
Kind Code:
A1
Abstract:
In unipolar charging, the discharge current value at which charging efficiency is best and the discharge current dependency of multivalent charging differs depending on the particle size of the particles to be charged. Therein, for each particle size, the discharge voltage at which monovalent charging efficiency is best and the discharge voltage at which the signal/noise ratio of a signal when particles of a different size are regarded as noise is best are obtained through experiment and stored in a storage unit (21). When scanning a classification voltage that is applied to a classification unit (32) of a DMA (3) in order to measure particle size distribution, a system control unit (2) acquires, from the storage unit (21), an optimal voltage corresponding to particle size, and in conjunction with the scanning of the classification voltage, controls a power source (11) for discharge via a discharge voltage control unit (10) such that the discharge voltage is scanned in accordance with changes in particle size. This makes it possible, for example, to reduce the contamination, with multivalent charged particles of different particle sizes, of particles of a prescribed particle size extracted by classification, and to accurately determine particle size distribution.
Inventors:
OKUDA HIROSHI (JP)
UENO YOSHIHIRO (JP)
SEKI HIROSHI (JP)
SAKURAI HIROMU (JP)
UENO YOSHIHIRO (JP)
SEKI HIROSHI (JP)
SAKURAI HIROMU (JP)
Application Number:
PCT/JP2015/068467
Publication Date:
January 07, 2016
Filing Date:
June 26, 2015
Export Citation:
Assignee:
SHIMADZU CORP (JP)
NAT INST OF ADVANCED IND SCIEN (JP)
NAT INST OF ADVANCED IND SCIEN (JP)
International Classes:
G01N15/02; B03C3/68; B03C7/02; G01N1/02; G01N27/60; H01T23/00
Domestic Patent References:
| WO2013183652A1 | 2013-12-12 |
Foreign References:
| JP2012078313A | 2012-04-19 | |||
| JP2008096169A | 2008-04-24 | |||
| JP2013057665A | 2013-03-28 | |||
| JP2002173763A | 2002-06-21 |
Other References:
See also references of EP 3165898A4
Attorney, Agent or Firm:
Kyoto International Patent Law Office (JP)
Patent business corporation Kyoto international patent firm (JP)
Patent business corporation Kyoto international patent firm (JP)
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