Title:
APPARATUS FOR MEASURING PARTICLE SIZE DISTRIBUTION AND DENSITY DISTRIBUTION SIMULTANEOUSLY
Document Type and Number:
Japanese Patent JP3391154
Kind Code:
B2
Abstract:
PURPOSE: To measure the particle size distribution of a group of particles to be measured and the density distribution thereof for each section of particle size simultaneously by applying a laser diffraction/scattering method.
CONSTITUTION: A group of particles to be measured W is scattered into a medium to produce a suspension S which is then contained in a sample cell 1 and irradiated with laser light emitted from a laser irradiation optical system 2 and the spatial intensity distribution of diffraction/scattering light is measured by an optical system 3. A particle size distribution calculating means 6b calculates the particle size distribution every moment from uniformly dispersed state of the group of sample W through a sedimentation process. Finally, a density distribution calculating means 6c calculates the density of particle group for each section of particle size by applying the time, required until the relative quantity of particle goes zero for each section of particle size, to the Stokes sedimentation formula.
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Inventors:
Haruo Shimaoka
Application Number:
JP16586095A
Publication Date:
March 31, 2003
Filing Date:
June 30, 1995
Export Citation:
Assignee:
SHIMADZU CORPORATION
International Classes:
G01N15/02; G01N15/00; G01N15/04; (IPC1-7): G01N15/02; G01N15/00; G01N15/04
Domestic Patent References:
| JP486545A | ||||
| JP49112691A |
Attorney, Agent or Firm:
Yoshiro Kurauchi