KR100733136B1 - Evaluation method of cotton stickiness using color reaction and image analysis - Google Patents

Abstract

A method for evaluating raw cotton stickiness is provided to measure degree of stickiness by visually and easily analyzing honeydew which is one of materials causing stickiness in a cotton spinning process. The method for evaluating cotton stickiness by using honeydew comprises the steps of removing contaminants from cotton to prepare a sample web; preparing a reagent for reacting with a sugar component in the honeydew; preparing a color reaction paper containing the reaction reagent; applying a certain pressure thereto so as to transfer the honeydew of the sample web to the color reaction paper to generate a spot for color reaction. In the method, the reaction regent contains p-aminobenzoic acid-phosphoric acid.

Description

Evaluation method of cotton stickiness using color reaction and image analysis {Evaluation Method of Cotton Stickiness using Color Reaction and Image Analysis}

Figure 1 schematically shows the progress of the evaluation method according to the present invention.

Figure 2 shows the results of the color reaction for the constituent sugars of honeydew that may exist on the surface (A) fructose (Fructose), (B) glucose (Glucose), (C) is melezitose ), (D) show sucrose and (e) the color reaction by trehalulose, respectively.

The left side of FIG. 3 shows the color reaction results of the cotton not contaminated with honeydew, and the right side of FIG. 3 shows the color reaction results of the cotton contaminated with honeydew.

Figure 4 shows a standard replica for the case of classifying the pollution degree into four grades.

Figure 5 shows the results of the evaluation of the surface tack by processing the honeydew contaminated raw material after the color reaction and the scanned image and software.

The present invention relates to a method for detecting honeydew, which is one of the causative agents that can cause sticking in the cotton spinning process, and evaluating cotton stickiness accordingly.

In general, the causative agents causing adhesion to cotton fibers in the cotton spinning process are classified into physiological sugars and entomological sugars of insect fibers. In particular, the secretion produced by ingestion and metabolism of cotton sap, such as white fly or cotton aphid, is called honeydew. The honeydew present on the surface may be transferred to the metal surface of the machine and the rubber roller during the spinning process, and may cause a lapping phenomenon in which the fibers are adhered, thereby causing a decrease in process efficiency and a decrease in the quality of the yarn.

Known methods for detecting honeydew present on the surface of the surface include methods of judging according to the sensory judgment of the skilled person, chemical test methods and physical test methods. The sensory judgment method has a problem that it is difficult to recognize objectivity. Chemical test methods include the Benedict test, the Bremen test, or the Perkins test. Benedict test and Bremen test are qualitative test methods and colorimetric evaluation is performed by the color of the solution reacted with reducing sugar. However, in practice, trehalulose or melezitose, known as a causative agent of sugar in honeydew, has a problem that does not participate in the reaction. On the other hand, the Perkins test can quantitatively measure the content of sugar, but can only measure the total equivalent and has a problem that it takes a long time to measure. Physical test methods include mini-card method, Sticky Cotton Thermo-detector (SCT) method, High Speed Stickiness Detector (H2SD) method and Fiber-Contamination Tester-Stickiness (FCT-S) method. Most of these methods use mini-cards to make a certain size of web and then contact the heating plate or pass through the heating rollers to image the number or area of sticking points on the aluminum foil or heating cylinder on the heating plate. Refers to the method of analysis or laser evaluation. The device involved in the mini card method has the advantage of being able to determine the presence of honeydew on a large amount of cotton in a short time, but the equipment is expensive and the adhesiveness can be evaluated in limited temperature and humidity conditions, so that the actual spinning process It is difficult to use easily.

The present invention has been made to solve the problems of the known honeydew detection method has the following object.

An object of the present invention is to transfer the honeydew distributed on the surface to the filter paper to easily determine the number or distribution of honeydew with the naked eye and to automatically calculate the area and the number of honeydew shown in the image of the color reaction paper if necessary. It is to provide a surface tack evaluation method that can measure the tack rating by.

According to a preferred embodiment of the present invention, the method for evaluating the surface adhesiveness by honeydew comprises the steps of preparing a sample web by removing the miscellaneous material from the surface; Determining a reagent that reacts with the sugar component of the honeydew; Preparing a color reaction sheet containing a reaction reagent; Applying a constant pressure to transfer the honeydew of the sample web to a color reaction sheet to develop a color reaction point.

According to another suitable embodiment of the present invention, as a reagent capable of reacting with sugar, p-aminobenzoic acid-phosphoric acid, malo-nic acid-aniline, p-methoxy Benzaldehyde (p-methoxybenzaldehyd-e) and phenylenediamine, and the like.

According to another suitable embodiment of the invention, the size of the voids is between 3 and 8 μm.

According to another suitable embodiment of the present invention, the constant pressure is from 0.01 to 0.08 kg / cm 2.

According to another suitable embodiment of the present invention, the method further comprises preparing a reaction solution by adding a reaction reagent to a mixed solution of acetone and water.

According to another suitable embodiment of the present invention, the method further comprises the step of classifying the degree of cotton tack as compared to various types of replicas.

According to another suitable embodiment of the invention, the method further comprises the step of scanning and processing the image of the replica and the colored color response point in software.

Hereinafter will be described in detail using the embodiments presented in the accompanying drawings of the present invention. The examples presented are exemplary and are not intended to limit the scope of the invention.

Figure 1 schematically shows the progress of the evaluation method according to the present invention.

Referring to Figure 1, the evaluation method according to the present invention comprises a sample web manufacturing step of removing foreign matter; Preparing a color reaction sheet; Contacting the sample web and color reaction sheet; Color reaction color development step; Comparison with standard replicas; And a rating step.

Example

1. Preparation of Sample Web

A cotton sample web is prepared that needs to be evaluated for the presence of honeydew, an insect secretion. Honeydew is an excrement discharged from insects after ingesting cotton sap and is present on or inside the web in the form of granules. The main components of honeydew include sugars and other carbohydrates as shown in FIG. In order to easily detect honeydew, the surface is first prepared with a device such as Micro Dust Trash Analyzer 3 (MDTA 3) to remove seeds or miscellaneous material to prepare a sample web in sizes of 0.5 g and 10 cm × 10 cm. The sample web may have any shape, but is preferably prepared in consideration of the same shape as the raw material to be produced.

2. Color Reactive  Ready

The color reaction reagent may be determined in consideration of the components of honeydew. Ingredients of honeydew may include fructose, glucose, melezitose, sucrose or trehalose. Therefore, the color reaction reagent must be able to react with all of these sugars, as shown in Figure 2. In particular, it should be able to react with melezitos and trehalulose, which are the main components of honeydew. Reagents that react with sugars include p-aminobenzoic acid-phosphoric acid, malo-nic acid-aniline, p-methoxybenzaldehyd-e and phenyl Although phenylenediamine is present, p-aminobenzoic acid-phosphoric acid, which gives a dark brown color reaction with melezitose and trehalulose, is preferably selected in consideration of the form of the reaction and the effect on the human body. Can be. The reaction was most pronounced when p-aminobenzoic acid-phosphoric acid was reacted with 0.1 ml of reaction reagent for 5 minutes at 120 DEG C for 0.01 g / L of sugar.

Once the reaction reagents are determined, the reaction solution is prepared. The reaction solution includes 1% p-aminobenzoic acid and 1% phosphoric acid as reaction reagents; Acetone; And water. Acetone and water are respectively mixed in a volume ratio of 30:70 and 1 wt% p-aminobenzoic acid and 1 wt% phosphoric acid, respectively, are added to the acetone-water mixed solution by weight to prepare a reaction solution. The prepared color reaction solution is based on Maillard reaction between sugar and amino compound, and acetone has a function of improving solubility of aminobenzoic acid. And water prevents the sugars transferred to the filter paper described below from spreading widely on the surface of the filter paper, and phosphoric acid also serves to promote the reaction by keeping the pH of the entire solution weakly acidic.

3. Color Reactive  Ready

The color reaction paper refers to a paper with a certain pore wetted with the color reaction liquid. The color reaction paper may be, for example, most preferably filter paper among white paper, matt paper, art paper and filter paper. For the application of the method according to the invention the filter paper may have pores with a diameter of about 3 to 8 μm and may be made of cellulose material.

4. By contact with the sample web Honeydew  transition

Once the color reaction paper is ready, the honeydew is transferred to the filter paper by contact with the sample web. The sample web is placed on a color reaction paper with a color reaction solution and subjected to a constant pressure, for example, 0.01 to 0.08 kg / cm 2. As a result, the honeydew scattered on the raw material is dissolved by the color reaction solution and transferred to the filter paper.

5. Color reaction Color

Honeydew, which has transferred to the color paper, develops under certain conditions. Coloring conditions vary depending on the reaction reagent used, but, for example, when p-aminobenzoic acid-phosphate is selected as the reaction reagent, color development is carried out using a hot air circulating oven. The color developing apparatus may include a hot air circulation oven, a sample receiver and a controller, and the controller may control temperature or time. In the case of p-aminobenzoic acid-phosphate, the color reaction paper is placed in a hot air circulation oven and treated for 3 to 8 minutes at a temperature of 100 to 150 ° C. Appears. The left side of FIG. 3 shows the color reaction results of the cotton not contaminated with honeydew, and the right side of FIG. 3 shows the color reaction results of the cotton contaminated with honeydew. It can be seen that the honeydew contamination degree of the cotton can be easily determined with the method according to the present invention as shown in FIG. 3.

6. Standard Replica  Classification according to the degree of contamination of manufacturing and cotton

Standard replicas are prepared to determine the degree of contamination of the cotton. Standard replicas collect dozens of cottons contaminated with honeydew, color them with a constant reaction reagent, and classify the cotton according to the color development and color development. The degree of contamination is then divided into several parts and used as a standard replica. For example, about 60 kinds of raw materials are collected and color-reacted with p-aminobenzoic acid-phosphoric acid, and the pollution degree is classified into 4 to 5 grades according to each pollution degree in consideration of the distribution and degree of brown spots. You can decide by replica. Figure 4 shows a standard replica for the case of classifying the pollution degree into four grades. The standard replica thus determined is used to determine the degree of honeydew contamination of the sample web. The sample web can be transferred to a color reaction sheet, followed by color reaction, and the degree of contamination can be determined by comparison with a standard replica. This degree of contamination can also be handled in software.

7. Color Reaction  Image analysis program and grading

In order for the color reaction result of the color reaction paper to be processed by software, the color reaction result of the color reaction paper must be input into the image. Image input can be scanned into a color image with a resolution of 200 dpi with an imaging device such as a scanner. The scanned image can be converted to, for example, an 8 bit gray image and displayed as follows.

GRAY = 0.3 * RED + 0.590 * GREEN + 0.11 * BLUE

The color reaction point of the sample web may be changed from the background of the intensity of the color reaction point so as to extract the color reaction point by the Laplace filter. Laplace filters can be 7 × 7 in size, 1 in number of treatments and 5 in strength.

In this way, the color reaction point located at a specific position of the sample web is distinguished from the background portion by the Laplace filter. After the Laplace filter process, a small amount of noise may be removed by a median filter. The median filter may be 3 × 3 in size and processed once. When the noise is removed by the median filter, the color response point may be extracted by the threshold processing. This threshold can be determined using the intensity distribution of the image. For example, a color response point may be extracted from a histogram representing a distribution of intensity of an image by determining a intensity of a intensity less than or equal to a maximum threshold as a threshold.

Substantially, when the color reaction point is treated by the threshold value, the size of the color reaction point tends to be larger than the original. The outermost pixel of the extracted color response point is removed to make the larger color response point extracted larger. This process uses a Morphology filter. For example, the morphology filter can be 2 × 2 in size and 1 treatment.

8. Grading of Cotton Adhesive

By extracting a pattern or dot corresponding to the honeydew from the color reaction paper using the program, the intensity and the number of color reaction points of the color reaction point of the sample web or the color reaction paper corresponding thereto may be calculated. The adhesion of the sample web or the corresponding surface may be graded according to the intensity and number of color reaction points. Grading can be determined according to certain formulas. For example, if the class of cotton stickiness is classified into four grades and the non-sticky cotton is graded 4, the total stickiness value (TSV) can be calculated as a deviation between the measured value and the reference value.

TSV = (Number of Measurements-Reference Number) ² × (Measurement Area-Reference Area) ²

According to the formula presented, the surface adhesiveness can be graded using the median and standard deviation of TSV for each grade obtained by analyzing the images of various grades of samples. Figure 5 shows the results of evaluation of the surface adhesion using the scanned image and software after color reaction of the honeydew contamination surface.

It will be apparent to one of ordinary skill in the art that such cotton grading is exemplary and the present invention is not limited by the examples presented. Cotton grading can be done in a variety of ways depending on the type of reaction reagent used, the number of replicas, the resolution and filtering of the image being scanned, or the number of grades.

The invention has been described in detail by presenting examples. The presented embodiments are illustrative and can be made by those skilled in the art to various modifications and modifications to the disclosed embodiments without departing from the spirit of the invention. The invention is not limited by the invention as such variations and modifications are limited only by the claims appended hereto.

The present invention makes it easy to determine the stickiness of the cotton by using the honeydew color reaction to the reaction reagent. In addition, the method according to the present invention has the advantage that it is possible to determine the cause and distribution of the surface adhesion according to the number of replicas. In addition, the method according to the present invention has the advantage that the surface cohesion can be processed by software to enable rapid and accurate processing.

Claims (5)

In the evaluation method of the surface adhesiveness by honeydew, Preparing a sample web by removing the miscellaneous material from the surface; Preparing a reagent that reacts with a sugar component of honeydew; Preparing a color reaction sheet containing a reaction reagent; And applying a constant pressure to transfer the honeydew of the sample web to the color reaction sheet to develop a color reaction point. The method of claim 1, wherein the reaction reagent is composed of p-aminobenzoic acid-phosphoric acid. The method of claim 1, further comprising adding a reaction reagent to a mixed solution of acetone and water to prepare a reaction solution. The method of claim 1, further comprising classifying the degree of cotton tack compared to various types of replicas. 5. The method of claim 4, further comprising the step of scanning and processing the image of the colored reaction point that has been colored.

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