Horiba, Ltd.

Hiroyuki Kitamura

Yoshiaki Togawa

Tetsuji Yamaguchi

Juichiro Ukon

Takeshi Shimizu

An data processing systemincludes: an integral partwhich integrates, by two mutually different times, light intensities indicating light intensity signals outputted from light detectorsrespectively provided for detecting intensities of scattered light and transmitted light generated by irradiating a sample powder S with light and then outputs each of the integrated values; an actuator control partwhich generates and outputs a control signal for a vibration actuatorwhich drops the sample powder S stored in a sample housing so that one of the integrated values of light intensity outputted from the integral partbecomes closer to a set value previously defined; and a particle size distribution calculation partwhich calculates the particle size distribution of the sample powder S based on another of the integrated values of light intensity outputted from the integral part

Particle size distribution analyzer

A dry particle-size distribution measuring apparatus and method is provided for suspending a plurality of bristle members across a support surface of a dispensing trough with bristles being arranged to contact and disperse any clusters of particles to a primary state prior to releasing the particles to a sample flow cell. A source of light can irradiate the sample flow cell and a detector unit can measure any scattered and/or diffracted light to provide corresponding signals. A control unit can determine the size and distribution of particles from the corresponding signals. The bristle members can be mounted on a brush unit that is directly mounted on the trough and both the trough and the brush unit can be driven by the same vibrator unit.

Sample supplying device for a dry particle-size distribution measuring apparatus and method

A particle-size distribution measuring apparatus and method is provided for suspending a sample containing particles in a fluid and introducing the suspended particles into a sample cell. The sample cell is illuminated with light from a laser source and the diffracted light from the particles is measured by an optical detector array. A computer circuit is capable of computing a plurality of graphs of particle-size distribution in repetitive measurement over a predetermined time period. A video display discloses the plurality of graphs in a juxtapositioned arrangement or stacked arrangement to enable the observer to distinguish between any variations in adjacent graphs.

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Kyoto, Japan

Hiroyuki Kitamura