Spectral data calibration method based on black and white calibration plates

Abstract

The invention discloses a spectral data calibration method based on black and white calibration plates. The method comprises the following steps of: firstly, collecting spectral data of a black calibration board and a white calibration board respectively; then collecting spectral data of a to-be-detected sample and carrying out data modeling, and recording the spectral data as spectral data X andthe model as a spectral model M; calculating actual spectral data Y of the to-be-detected sample by combining the spectral data of the black calibration plate and the spectral data X of the sample; calculating the actual reflectivity H of the to-be-detected sample by combining the spectral data of the white calibration plate and the actual spectral data Y of the sample; and finally, carrying out data modeling on the reflectivity H by adopting a modeling method which is the same as that of the spectral model M, and judging the quality of the spectral model through a model correlation coefficient and a root-mean-square error. According to the method, the spectral data can be effectively calibrated, the spectral model quality and the spectral prediction accuracy are further improved, meanwhile, the method is easy to implement, and the problem that the portable near infrared spectral data is difficult to calibrate is solved to a great extent.

Description

technical field [0001] The invention relates to the technical field of spectral data calibration, in particular to a method for calibrating spectral data based on a black and white calibration board. Background technique [0002] In recent years, near-infrared spectroscopy has developed rapidly and has been applied in many fields such as chemical industry, pharmaceuticals, military industry, and food. Near-infrared spectroscopy belongs to molecular spectroscopy, which can indicate material composition and property information at the molecular level. It has achieved very high benefits and great development potential in terms of economic and social impacts. [0003] However, at present, most of the detection of material composition and property information is mainly carried out by large-scale laboratory near-infrared spectroscopy instruments. Although these methods are quantitatively accurate and sensitive, the equipment required is bulky and expensive, and the sample preparat...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings in the above-mentioned background technology, and provide a spectral data calibration method based on a black and white calibration board, which can effectively calibrate the spectral data, thereby improving the quality of the spectral model and the accuracy of spectral prediction, and at the same time, it is easy to implement and greatly To a certain extent, the problem of difficult calibration of portable near-infrared spectral data is solved

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