Rapid and convenient white granulated sugar particle size analysis method based on graphic processing

Abstract

The invention relates to the technical field of white sugar analysis, in particular to a quick and convenient white granulated sugar particle size analysis method based on graphic processing. According to the method, the diffusion condition of the colored solution is recorded in an image or video recording mode through camera equipment, the diffusion time of the colored solution in the to-be-detected sample is obtained, and the diffusion time of the colored solution in the to-be-detected sample and the standard sample mixture is calculated based on the Friedel's law and the Stokes Einstein law. The method has the advantages of simplicity and convenience in operation and less time consumption, and solves the problems of various experimental operations and long steps in the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of white sugar analysis, and in particular to a fast and convenient white sugar particle size analysis method based on graphic processing. Background Art

[0002] The current particle size analysis experiment of white sugar in table sugar is basically as described in GB / T 35887-2018 "White Sugar Test Method" 3.1: "Use a set of test sieves to screen the sugar sample under certain conditions, weigh the sugar sample retained in each sieve, and calculate the relationship between the percentage of sugar sample retained on the sieve and the sieve hole." The above method has complicated procedures, is time-consuming, and has the problem of low efficiency.

[0003] In addition to the existing standards, there are particle size measurement tools such as dynamic light scattering and laser particle size analyzer on the market. However, the principle of dynamic light scattering is to determine the hydrodynamic size of particles by measuring the effect of Brownian motion on light scattering in the dispersed system.

[0004] The rate of Brownian motion can be quantified by the translational diffusion coefficient, usually represented by D. In a dispersed system, smaller particles diffuse faster and larger particles diffuse slower. It is an effective method for submicron and nanoparticle size and its distribution. For centimeter-level particle sizes, the deviation is large, and there is a disadvantage that the underlying logic does not match the macroscopic material and is not applicable.

[0005] In addition, there is a coulometric particle sizer, which measures the particle size by calculating the resistance change of particles immersed in polar solvents. However, for sugar, since sugar is easily soluble in polar solvents, it will damage the original particles and there is a disadvantage of inaccurate data. Summary of the invention

[0006] The purpose of the invention is to solve the problems existing in the prior art and provide a fast and convenient method for analyzing the particle size of white sugar based on image processing.

[0007] In order to solve the problems existing in the prior art, the present invention adopts the following technical solutions:

[0008] A fast and convenient method for analyzing the particle size of white sugar based on image processing includes the following steps:

[0009] S1. Set the lighting environment;

[0010] S2. In the illumination environment, the average particle size Ds of the standard sample and the time ts for the colored solution to completely diffuse in the standard sample are obtained in advance, and coefficients A and B suitable for the illumination environment are obtained by the average particle size Ds of the standard sample and the time ts for the colored solution to completely diffuse in the standard sample;

[0011] S3, placing a mixture of the standard sample and the sample to be tested in a colorimetric vessel under the illumination environment, injecting a colored solution at one end of the colorimetric vessel, and diffusing the colored solution in the colorimetric vessel;

[0012] A camera device is provided at the other end of the colorimetric vessel, and the diffusion of the colored solution in the mixture is recorded in the form of an image or video by the camera device, and the time tx when the colored solution is completely diffused in the mixture is obtained;

[0013] The particle size Dx of the sample to be tested is calculated by the particle size calculation formula, as shown below:

[0014]

[0015] Wherein, Dx is the average particle size of the sample to be tested, ts is the time for the colored solution to completely diffuse in the standard sample, tx is the time for the colored solution to completely diffuse in the standard sample and the sample to be tested, Ds is the average particle size of the standard sample, and A and B are coefficients suitable for the lighting environment.

[0016] As an improvement of the technical solution of a fast and convenient white sugar particle size analysis method based on image processing of the present invention, in S2, under the same lighting environment, a standard sample is placed in a colorimetric vessel, a colored solution is injected into one end of the colorimetric vessel, and the colored solution diffuses in the colorimetric vessel;

[0017] A camera device is provided at the other end of the colorimetric vessel, and the diffusion of the colored solution is recorded in the form of an image or video by the camera device, and the time tx when the colored solution is completely diffused in the standard sample is obtained;

[0018] Repeat the above steps multiple times to obtain coefficients A and B suitable for the lighting environment.

[0019] As an improvement of the technical solution of a fast and convenient method for analyzing the particle size of white sugar based on image processing of the present invention, the colorimetric vessel is a rectangular colorimetric vessel, and ethanol is stored in the colorimetric vessel.

[0020] As an improvement of the technical solution of a fast and convenient method for analyzing the particle size of white sugar based on image processing of the present invention, in S3, a standard sample of equal mass and the sample to be tested are weighed, mixed, and transferred to a colorimetric vessel containing ethanol.

[0021] As an improvement of the technical solution of a fast and convenient method for analyzing the particle size of white sugar based on image processing of the present invention, the colored solution is bromothymol.

[0022] As an improvement of the technical solution of a fast and convenient method for analyzing the particle size of white sugar based on image processing of the present invention, in S3, a colored solution is injected from the upper right end of the colorimetric vessel, the colored solution diffuses in the colorimetric vessel, and diffuses to the lower left end of the colorimetric vessel to be completely diffused.

[0023] Beneficial effects of the present invention:

[0024] In the present invention, the diffusion of the colored solution is recorded in the form of images or videos by a camera device, and the diffusion time of the colored solution in the sample to be tested is obtained. Based on Frick's law and Stokes-Einstein's law, the particle size of the sugar sample is calculated by the diffusion time of the colored solution in the mixture of the sample to be tested and the standard sample. This method has the advantages of simple operation and less time consumption, and solves the problems of complex experimental operations and long steps in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the present invention;

[0026] Figure 2 Schematic diagram of RGB information matching of the invention. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and beneficial effects of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] like Figure 1 and Figure 2 As shown, a fast and convenient method for analyzing the particle size of white sugar based on image processing is characterized in that it includes the following steps:

[0029] S1. Set the lighting environment;

[0030] S2. In the illumination environment, the average particle size Ds of the standard sample and the time ts for the colored solution to completely diffuse in the standard sample are obtained in advance, and coefficients A and B suitable for the illumination environment are obtained by the average particle size Ds of the standard sample and the time ts for the colored solution to completely diffuse in the standard sample;

[0031] S3, placing a mixture of the standard sample and the sample to be tested in a colorimetric vessel under the illumination environment, injecting a colored solution at one end of the colorimetric vessel, and diffusing the colored solution in the colorimetric vessel;

[0032] A camera device is provided at the other end of the colorimetric vessel, and the diffusion of the colored solution in the mixture is recorded in the form of an image or video by the camera device, and the time tx when the colored solution is completely diffused in the mixture is obtained;

[0033] The particle size Dx of the sample to be tested is calculated by the particle size calculation formula, as shown below:

[0034]

[0035] Wherein, Dx is the average particle size of the sample to be tested, ts is the time for the colored solution to completely diffuse in the standard sample, tx is the time for the colored solution to completely diffuse in the standard sample and the sample to be tested, Ds is the average particle size of the standard sample, and A and B are coefficients suitable for the lighting environment.

[0036] In the present invention, the diffusion of the colored solution is recorded in the form of images or videos by a camera device, and the diffusion time of the colored solution in the sample to be tested is obtained. Based on Frick's law and Stokes-Einstein's law, the particle size of the sugar sample is calculated by the diffusion time of the colored solution in the mixture of the sample to be tested and the standard sample. This method has the advantages of simple operation and less time consumption, and solves the problems of complex experimental operations and long steps in the prior art.

[0037] In some embodiments of the present invention, in S2, under the same illumination environment, a standard sample is placed in a cuvette, a colored solution is injected into one end of the cuvette, and the colored solution diffuses in the cuvette;

[0038] A camera device is provided at the other end of the colorimetric vessel, through which the diffusion of the colored solution is recorded in the form of an image or video, and the time tx when the colored solution is completely diffused in the standard sample is obtained; the above steps are repeated multiple times to obtain coefficients A and B suitable for the lighting environment.

[0039] In some embodiments of the present invention, the cuvette is a cuboid cuvette, and ethanol is stored in the cuvette.

[0040] In some embodiments of the present invention, in S3, the standard sample and the sample to be tested are weighed and mixed with the same mass, and then transferred to a colorimetric vessel containing ethanol.

[0041] In some embodiments of the invention, the colored solution is bromothymol.

[0042] In some embodiments of the present invention, in S3, a colored solution is injected from the upper right end of the cuvette, the colored solution diffuses in the cuvette, and diffuses completely to the lower left end of the cuvette.

[0043] In detail, according to Frick's law, the diffusion flux per unit area J=-D*t, where D is the diffusion coefficient and t is the diffusion time.

[0044] Moreover, according to Stokes-Einstein's law It can be seen that when measuring under the same environment, the diffusion coefficient D is related to the radius of the medium particles, that is, if the same diffusion effect is required, that is, the same flux, the required time t is negatively correlated with the sample particle t and the radius r. At the same time, the radius ratio of the sample to be tested and the standard sample can be calculated by the ratio of the diffusion time t1 and t2 of the colored solution in the sample to be tested and the standard sample respectively.

[0045] According to the above theory and experimental experience, the particle size calculation formula is obtained by correction. Where Dx is the particle size of the sample to be tested, Ds is the particle size of the standard sample, ts is the diffusion time of the colored solution in the sample to be tested, and tx is the diffusion time of the colored solution in the standard sample.

[0046] By calculating the ratio of the two times t1 and t2, the radius ratio of the sample to be tested and the standard sample can be calculated, and then the average particle size of the sample to be tested can be quickly measured. This patent uses an image recognition method, uses an algorithm to structure the sugar sample photo, extracts its RGB color code and frequency of occurrence, and calculates the information obtained by weighted average calculation based on its frequency. It is compared with the information of the standard color value sample to calculate the particle size of the sample. It has the advantages of simple operation and minimal time consumption.

[0047] As a specific embodiment of the present invention, the operating steps of the present invention are as follows:

[0048] 1. Weigh the sample to be tested and the standard sample of equal mass, transfer them into the colorimetric vessel, and inject an equal amount of ethanol at the same time;

[0049] 2. Then inject a colored liquid such as bromothymol at one end (in the example, inject at the right end, place the camera at the left end, and record the information of the left end cross section, as shown below: Figure 2 .RGB information matching diagram shown)

[0050] 3. The diffusion process of colored liquids. Over time, the colored solution gradually diffuses, as follows

[0051] 4. When the diffusion is complete (details are as follows), based on the left camera correlation, record the T required for the final diffusion to be complete.

[0052] 5. Repeat the above operation with 3 different standard samples. The results are recorded in the following table. Using D1 / D2 as the dependent variable and t1 / t2 as the independent variable for fitting, the A and B coefficients of the fitting equation can be calculated.

[0053] Table 1 Example standard sample information table

[0054]

[0055] The samples of unknown particle size are divided into two batches. One batch is processed by the above-mentioned treatment method of this patent, and the other batch is operated as described in 3.1 of GB / T 35887-2018 "Test Method for White Granulated Sugar": "Use a set of test sieves to screen the sugar samples under certain conditions, weigh the sugar samples retained in each sieve, and find the relationship between the percentage of sugar samples retained on the sieve and the sieve holes." The specific results are as follows:

[0056] Table 2 Example unknown sample information table

[0057]

[0058] As can be seen from Table 2, the patented method is accurate and reliable, and is superior to the current standard conventional chemical method in terms of operation, time and cost.

[0059] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

Claims

1. A fast and convenient method for analyzing the particle size of white sugar based on image processing, characterized in that: The following steps are included: S1. Set the lighting environment; S2. In the illumination environment, the average particle size Ds of the standard sample and the time ts for the colored solution to completely diffuse in the standard sample are obtained in advance, and coefficients A and B suitable for the illumination environment are obtained by the average particle size Ds of the standard sample and the time ts for the colored solution to completely diffuse in the standard sample; S3, placing a mixture of the standard sample and the sample to be tested in a colorimetric vessel under the illumination environment, injecting a colored solution at one end of the colorimetric vessel, and diffusing the colored solution in the colorimetric vessel; A camera device is provided at the other end of the colorimetric vessel, and the diffusion of the colored solution in the mixture is recorded in the form of an image or video by the camera device, and the time tx when the colored solution is completely diffused in the mixture is obtained; The particle size Dx of the sample to be tested is calculated by the particle size calculation formula, as shown below: Wherein, Dx is the average particle size of the sample to be tested, ts is the time for the colored solution to completely diffuse in the standard sample, tx is the time for the colored solution to completely diffuse in the standard sample and the sample to be tested, Ds is the average particle size of the standard sample, and A and B are coefficients suitable for the lighting environment.

2. A fast and convenient method for analyzing the particle size of white sugar based on image processing according to claim 1, characterized in that: In S2, under the same lighting environment, a standard sample is placed in a colorimetric vessel, a colored solution is injected into one end of the colorimetric vessel, and the colored solution diffuses in the colorimetric vessel; A camera device is provided at the other end of the colorimetric vessel, and the diffusion of the colored solution is recorded in the form of an image or video by the camera device, and the time tx when the colored solution is completely diffused in the standard sample is obtained; Repeat the above steps multiple times to obtain coefficients A and B suitable for the lighting environment.

3. A fast and convenient method for analyzing the particle size of white sugar based on image processing according to claim 1, characterized in that: The colorimetric vessel is a rectangular colorimetric vessel, and ethanol is stored in the colorimetric vessel.

4. A fast and convenient method for analyzing the particle size of white sugar based on image processing according to claim 1, characterized in that: In S3, the standard sample and the sample to be tested are weighed and mixed with the same mass, and then transferred to a colorimetric vessel containing ethanol.

5. A fast and convenient method for analyzing the particle size of white sugar based on image processing according to claim 1, characterized in that: The colored solution is bromothymol.

6. A fast and convenient method for analyzing the particle size of white sugar based on image processing according to claim 1, characterized in that: In S3, a colored solution is injected from the upper right end of the cuvette, and the colored solution diffuses in the cuvette and diffuses completely to the lower left end of the cuvette.

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