公开(公告)号：US20220355258A1

公开(公告)日：2022-11-10

申请号：US17764595

申请日：2020-10-09

Applicant: Hitachi, Ltd.

Inventor： Jun TANAKA ,  Tomonari MISAWA ,  Yusuke KAGA ,  Yoshiki YONAMOTO

IPC: B01F29/62 ,  B01F23/60 ,  B01F35/213 ,  G01N21/85

Abstract: A powder mixing system and method improves productivity of a final product by reducing time required for completion of mixing. The powder mixing system includes a mixing vessel provided with a rotating shaft for mixing multiple kinds of powder, a rotating machine for rotating the mixing vessel by means of the rotating shaft, an image photographing device for acquiring an image of the powder in a mixing process, and a computer. The mixing vessel includes a window through which the image of the powder is photographed. The computer has a function of detecting that the mixing vessel is located at a predetermined position. The image photographing device acquires the image of the powder through the window of the mixing vessel located at the predetermined position. The computer estimates a mixing state of the powder based on the acquired image of the powder.

公开(公告)号：US20200342151A1

公开(公告)日：2020-10-29

申请号：US16857697

申请日：2020-04-24

Applicant: HITACHI, LTD.

Inventor： Tomonari MISAWA

IPC: G06F30/25

Abstract: Provided is a particle behavior simulation method and a particle behavior simulation system for representing behavior of each particle in a large-scale particle system quickly and accurately. The particle behavior simulation system is configured to execute a coarse-graining processing of reconstituting a plurality of particles that mix with each other and constitute a predetermined powder as a particle system into a plurality of particle groups each including a plurality of the particles, an acting force calculation processing of calculating an acting force acting on each of the particle groups, and a mixing state calculation processing of calculating a parameter representing a mixing state of constituent particles of each of the particle groups after a predetermined time based on the calculated acting force.

公开(公告)号：US20220088607A1

公开(公告)日：2022-03-24

申请号：US17473071

申请日：2021-09-13

Applicant: Hitachi, Ltd.

Inventor： Tomonari MISAWA

IPC: B01L3/00

Abstract: Provided are a compact mixing system capable of reducing a use amount of a mixing agent and reducing a volume of a utility that supplies the mixing agent, and a measurement system using the mixing system. The mixing system includes: a mixing agent discharge nozzle through which a mixing agent to be mixed with a sample is to be discharged; and a movable mechanism configured to adjust a gap between the mixing agent discharge nozzle and a sample collection port that opens to an inside of a sample tube through which the sample is to flow so as to collect the sample.

公开(公告)号：US20200326267A1

公开(公告)日：2020-10-15

申请号：US16844284

申请日：2020-04-09

Applicant: HITACHI, LTD.

Inventor： Tomonari MISAWA

IPC: G01N15/02

Abstract: A particle size measuring apparatus capable of measuring a smaller particle size includes: a first light source configured to emit parallel beam to a sample containing particles; a first image capturing apparatus disposed to approximately face the first light source with the sample disposed therebetween and configured to capture an image of the sample; and an image analyzing unit configured to analyze the image captured by the first image capturing apparatus. The first image capturing apparatus and the first light source are disposed so as to approximately face each other so that an image of scattered light of the parallel beam incident on particles and scattered at a prescribed angle θth or smaller is captured by the first image capturing apparatus. The image analyzing unit is configured to calculate a particle size on the basis of a scattered light image captured by the first image capturing apparatus.

公开(公告)号：US20240385098A1

公开(公告)日：2024-11-21

申请号：US18556016

申请日：2022-06-27

Applicant: Hitachi, Ltd.

Inventor： Tomonari MISAWA

IPC: G01N15/0205 ,  G01N15/0227

Abstract: Particle size measurement and material discrimination can be performed simultaneously with a less expensive configuration. A particle measuring apparatus includes: a first light source and a second light source that irradiate a sample containing particles of a predetermined material with parallel light; an imaging unit that captures a scattered light image of the particles by the parallel light emitted from the first light source, and a shadow image of the particles by the parallel light emitted from the second light source; and an image processing unit that performs material discrimination of the particles based on correspondence between scattered light intensity of the particles specified based on the scattered light image and a shadow size of the particles specified based on the shadow image, and a theoretical correlation curve showing a theoretical value of the correspondence of the particles, and calculates a particle size of the particles.

公开(公告)号：US20220244161A1

公开(公告)日：2022-08-04

申请号：US17574325

申请日：2022-01-12

Applicant: Hitachi, Ltd.

Inventor： Tomonari MISAWA ,  Takuya KAMBAYASHI

IPC: G01N15/02

Abstract: To provide a particle measuring device capable of removing particles adhering to an observation window for capturing an image of the particles and measuring an accurate particle size distribution. A particle measuring device that image-recognizes particles contained in a fluid to be measured and measures a physical quantity of the particles includes: a sample holding region that holds a sample containing the particles; an observation window disposed on a wall surface of the sample holding region; and a cleaning nozzle configured to discharge a cleaning liquid toward the observation window, in which the cleaning liquid is different from the fluid to be measured.