Method and device for identifying a material by the spectral analysis of electromagnetic radiation passing through said material

摘要

A method identifying a material, includes: measuring an electromagnetic radiation spectrum emitted through the material; determining at least one measurement energy band, and spectral coefficients of a comparison function in the measurement band, using the measured spectrum; estimating, using the determined spectral coefficients, a nature and/or thickness of the material based on a set of reference spectral parameters relating to reference materials and/or thicknesses and defined in reference bands. The estimating includes: prior selecting plural reference materials and/or thicknesses, as possible candidates, from comparing the spectral coefficients determined with at least one portion of the reference spectral parameters; estimating the nature and/or thickness of the material from comparing the spectral coefficients determined with the spectral parameters of at least one portion of the possible candidates, in at least one energy band common to the reference bands of the at least one portion of possible candidates and the measurement band.

主权项

1. A method for identifying a material by spectral analysis of electromagnetic radiation emitted through the material, comprising:
measuring a spectrum of the electromagnetic radiation emitted through the material; determining at least one measurement energy band as a measurement band, and spectral coefficients of a comparison function in the measurement band, using the measured spectrum; and estimating, using the determined spectral coefficients, a nature of the material and/or a thickness of the material based on a set of reference spectral parameters relating to reference materials and/or reference thicknesses of the reference materials, the reference spectral parameters being defined for each reference material and/or each reference thickness of each reference material in at least one reference energy band as a reference band, which is specific to said each reference material and/or said each reference thickness of each reference material, wherein the estimating further comprises:
prior selection of possible candidates from the reference materials and/or from the reference thicknesses of the reference materials, from a comparison of the determined spectral coefficients with at least one portion of the set of reference spectral parameters in at least one first energy band that is common to at least part of the reference bands and to the measurement band,determining at least one new energy band that is common to reference bands of at least one portion of the possible candidates and to the measurement band, andestimating the nature of the material and/or the thickness of the material from a comparison of the determined spectral coefficients with reference spectral parameters of the at least one portion of the possible candidates, in the at least one new energy band that is common to the reference bands of the at least one portion of the possible candidates and to the measurement band.