Horiba, Ltd.

Kyowa Hakko Kogyo Co., Ltd.

Hideyuki Ikeda

Yoshiaki Togawa

Yuki Nakano

Kiyoshi Morimoto

Yasushi Watanabe

Takuji Kurozumi

Makoto Nagura

Yuki Ishii

Seiichiro Yoshioka

Satoru Hiruta

In a measurement system, by suppressing the environmental changes of counter-flow of air, and temperature changes and the like, measurement can be accomplished with stable high precision and replication, and by providing a transparent cellwhich stores a particles dispersed in a dispersion medium, and a light source which irradiates light onto the particles within the transparent cell, and multiple light detectorsscattered and arranged to detect the intensity of diffracted/scattered light produced by the irradiation of light, and a computer devicewhich calculates the particle size distribution of the particles based on the light intensity signal output from the light detectors, in addition to the establishment of cell storage space S which stores the transparent celland the equipment storage spaces Sand Swhich store the light source, the light detector, and the optical device, the equipment storage spaces Sand Sare given tight closed construction separate from the cell storage space S.

Particle size distribution analyzer

A particle diameter distribution measurement apparatus and method includes a sample cell that can be irradiated by a source of light. A plurality of detectors are positioned operatively adjacent to the sample cell to measure light interacting with a specimen in the sample cell. A storage unit stores values representative of outputs of the detectors for a plurality of standard particle sizes. The representation outputs extend across a range of detection for a plurality of detectors. A controller unit can perform a calibration based on the stored values and an actual measurement of one or more standard particle sizes that has the capability of providing a range of detection that will be inclusive of a standard particle size that is not available for measurement.

Particle diameter distribution measurement apparatus and method of calibration

The present invention provides a particle diameter distribution measuring method, a particle diameter distribution measuring device, and a measuring program which decreases the dependence of the calculation of particle diameter distribution on sample concentration, and can measure with higher precision by setting a concentration correction unique to a specific measuring sample in a particle diameter distribution measuring device. The measuring sample is measured by changing its concentration. Concentration correction constants for correcting detection values of detectors according to the concentration of the sample are found. The detection values of the respective detectors are corrected by using the concentration correction constants, and the particle diameter distribution is measured by using the corrected detection values of the respective detectors.

Particle size distribution measuring method, device, and program for compensating for particle concentration

This invention provides a particle size distribution measuring apparatus, which has a function of informing an operator of a procedure of validation work of the particle size distribution measuring apparatus. A storage medium which records validation data providing a procedure of validation work for the particle size distribution measuring apparatus and a control unit which has a validation help function which successively reads a validation procedure from the validation data and controls the particle size distribution measuring apparatus according to a measuring procedure without any operation by an operator in the validation procedure while teaching the operator a work procedure requiring an operation by the operator.

Particle size distribution measuring apparatus with validation and instruction modes

A light transmission powder and granular material measuring apparatus for a continuous production line assembly is provided. A conduit line is capable of being connected to the production line to provide an alternative flow path for the powder and/or granular material. A light transmission cell is mounted in the conduit and a measurement apparatus is provided for measuring the light as it passes through the light transmission cell. A valve member can interconnect the conduit to the production line to control the flow of powder and/or granular material, whereby a measurement can be made when the valve is activated to permit the flow of powder and/or granular material to provide an accurate measurement, and also a measurement can be made as a reference measurement during a calibration cycle when the valve is activated to stop the flow of powder and/or granular material. The light transmission powder and/or granular material measuring apparatus can be provided as a modular unit for mounting in a continuous production line and can be automatically controlled to periodically calibrate its measurements.

Growing community of inventors

Kyoto, Japan

Hideyuki Ikeda