The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 12, 1995
Filed:
Mar. 04, 1994
Alain Espinosa, Lavera, FR;
Didier C Lambert, Lavera, FR;
Andre Martens, Chateauneuf les Martigues, FR;
Antoine Pasquier, London, GB;
Gilbert Ventron, Lavera, FR;
BP Oil International Limited, London, GB;
Abstract
The properties of a liquid hydrocarbon blend are determined from the NIR (Near Infra Red) spectrum of the components of the blend. This is accomplished by: (a) determining with an IR spectrometer, the absorbance of the components of the blend at a certain number of frequencies in the spectral range 16667 to 3840 cm.sup.-1 starting from a defined base line, (b) determining for each component and each property, a spectral mixture index (SMI) by applying a correlation between the SMI and the absorbance values, and then (c) calculating the property (J) to be determined by applying a linear expression, J=f.sub.a SMI.sub.a.sup.J +f.sub.s SMI.sub.b.sup.J +f.sub.c SMI.sub.c.sup.J + . . . f.sub.o SMI.sub.o.sup.J where SMI.sup.J.sub.(a, b, c . . . ) is the Spectral Mixture Index for property J for each component (a, b, c . . . ) and f.sub.(a, b, c . . . ) is the fraction by volume of that component in the final blend. The correlation in (b) is determined experimentally by multivariate regression, and is dependent upon the type of spectrometer used, the property to be determined, and the frequencies used.