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Method for judging consistency of spectra of mixtures

A technology of mixture spectrum and determination method, applied in the field of spectrum consistency determination, can solve the problems of high cost, inability to determine the sample to be tested, low efficiency, etc., and achieve the effect of low cost, easy understanding and high efficiency

Active Publication Date: 2019-04-05
SHANGHAI OCEANHOOD OPTO ELECTRONICS TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for determining the consistency of the spectrum of a mixture to solve the above-mentioned deficiencies in the prior art, such as high cost, low efficiency, and inability to determine whether the tested sample definitely belongs to a known series of samples

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  • Method for judging consistency of spectra of mixtures
  • Method for judging consistency of spectra of mixtures
  • Method for judging consistency of spectra of mixtures

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Embodiment example

[0042] Take A of 6 samples of the same type 1 ~A 6 and 1 heterogeneous sample B 1 The near-infrared spectrum, such as figure 1 .

[0043] According to this from sample A 1 ~A 6 Any one of them is selected as the tested sample, and the rest of the samples are used as the sample library. The attributive coefficient ψ calculated respectively is:

[0044] 0.9969, 0.9967, 0.9934, 0.9939, 0.9971, 0.9970;

[0045] If the sample A 1 ~A 5 As a sample library, calculate sample A in steps 6 with sample A 1 ~A 5 consistency, figure 2 is its Sall sequence.

[0046] Calculate sample B 1 to A 1 ~A 5 The attribution coefficient ψ of the sample library is: 0.9739, image 3 is B 1 with A 1 ~A 5 The Sall sequence.

[0047] The calculation results show that sample B 1 to A 1 ~A 5 The degree of attribution of the series samples is lower than that of any sample of the same type, so it can be judged that sample B 1 with sample A 1 ~A 5 Not of the same kind.

[0048] Calcula...

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Abstract

Provided is a mixture spectrum consistency determination method, relating to a spectrum consistency determination method. The method comprises: establishing a mobile window, performing segmented inspection on detected sample spectrums and existing serial sample spectrums in a sample database in the mobile window, calculating the space angle value between the vector formed by the detected sample spectrums in the mobile window and the matrix formed by the existing serial sample spectrums, and obtaining a serial angle value through the mobile window; and adjusting the size of the mobile window to obtain the difference distribution between the detected sample spectrums and the existing serial sample spectrums at different positions and in different sizes, determining the consistency between the detected sample spectrums and the existing serial sample spectrums according to the difference distribution, and furthermore determining whether detected samples and exiting serial samples have same attributes. The method can accurately determine whether a detected sample definitively belongs to an existing serial sample, and has the characteristics of low cost and high efficiency, and is simple and visual, convenient to understand and easy to popularize.

Description

technical field [0001] The invention relates to a method for judging the consistency of spectra, in particular to a method for judging the consistency of spectra of mixtures. Background technique [0002] Near-infrared spectroscopy can adopt flexible measurement methods such as transmission and diffuse reflection, which is suitable for completing on-site measurement tasks. However, the significance of its spectral features is insufficient, and often requires the cooperation of more complex chemometric methods, which reduces the practicability of the method and increases the implementation cost of the method. [0003] Many practical analysis tasks, such as classification of objects, identification of authenticity, identification of doping, etc., can be performed through spectral comparison to complete non-destructive and rapid tests, and the work content can be attributed to determining the consistency of spectra. However, the objects for actual measurement are usually not p...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00
CPCG06T7/0002G06T2207/10048
Inventor 姚志湘粟晖
Owner SHANGHAI OCEANHOOD OPTO ELECTRONICS TECH
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