公开(公告)号：US20230417656A1

公开(公告)日：2023-12-28

申请号：US17849360

申请日：2022-06-24

Applicant: ABB Schweiz AG

Inventor： Raphaël Desbiens ,  John Brian Leen ,  Kyle Owen

IPC: G01N21/31 ,  G01N33/00

CPC classification number: G01N21/31 ,  G01N33/0044 ,  G01N33/004 ,  G01N2201/0612

Abstract: The present disclosure relates to measuring chemical constituents and associated properties of hydrocarbon fuel mixtures, and further relates to tunable diode laser absorption spectrometry gas analyzers having improved chemometric models. Methods described herein include setting gas concentration fit coefficients to a chemometric model for the measured gas concentration data for each of one or more background; wherein the chemometric model employs a broadband offset basis to a final basis set spectrum for the one or more gaseous target components; applying an iterative mathematical model to the measured light absorption data by iteratively adjusting target component fit coefficients until the measured light absorption data matches the chemometric model; and, determining a calculated amount of the one or more target components within the sample gas mixture by applying the gas concentration fit coefficients and the target component fit coefficients to the measured light absorption data and to the measured gas concentration data.