US 6,281,499 B1Granted

Method for analyzing measured value by on-line spectral analyzer

AssigneeNireco Corporation

InventorsTomoyuki Kobayashi, Kouji Kobayashi, Kouichi Sato, Takeo Yamada

Life of this patent

Estimating the term…

Loading patent…

Abstract

An object to be measured is analyzed by a chemical means or a physical means to make its characteristic value clear, a spectrum of the same object to be measured is obtained by an off-line near infrared spectral analyzer, a calibration indicative of a relation between the spectrum and the characteristic value is obtained, at least one sample is selected from among the same kind of objects to be measured, spectra are obtained by the off-line near infrared spectral analyzer and an on-line near infrared spectral analyzer, a difference between both of the obtained spectra is obtained, a spectrum of the same kind of object to be measured is measured by the on-line near infrared spectral analyzer, the measured spectrum is corrected by the difference between both of the spectra, and the characteristic value of the object to be measured is estimated by using the corrected spectrum and the calibration.

Claims5

Dependent claims

A method for analyzing a measured value by an on-line spectral analyzer, comprising the steps of:

analyzing an object to be measured, by a chemical means or a physical means to make its characteristic value clear;
obtaining a spectrum of the same object to be measured, by an off-line near infrared spectral analyzer;
obtaining a calibration indicative of a relation between said spectrum and said characteristic value;
selecting at least one sample from among the same kind of objects to be measured;
obtaining spectra by said off-line near infrared spectral analyzer and an on-line near infrared spectral analyzer;
obtaining a difference between both of the obtained spectra;
measuring a spectrum of the same kind of object to be measured, by said on-line near infrared spectral analyzer;
correcting the measured spectrum by said difference between both of the spectra;
and estimating a characteristic value of the object to be measured, by using the corrected spectrum and said calibration.

6 more elements

Dependencies are inferred from the claim text.