CN105136800A - Method for fast detecting alpha-alumina on surface of spraying wear-resistant impregnated paper - Google Patents
Method for fast detecting alpha-alumina on surface of spraying wear-resistant impregnated paper Download PDFInfo
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- CN105136800A CN105136800A CN201510536847.6A CN201510536847A CN105136800A CN 105136800 A CN105136800 A CN 105136800A CN 201510536847 A CN201510536847 A CN 201510536847A CN 105136800 A CN105136800 A CN 105136800A
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Abstract
The invention discloses a method for fast detecting alpha-alumina on the surface of spraying wear-resistant impregnated paper. The method includes the following steps that sampling and dyeing are performed, wherein a to-be-detected spraying wear-resistant impregnated paper sample of preset area is placed in a dyeing agent and dyed; image scanning is performed, wherein after the dyed spraying wear-resistant impregnated paper is dried, an image is formed through scanning of a scanner; image processing is performed, wherein image contrast is adjusted so that alpha-alumina particles can be prominent, and re-sharpening enables the edges of the alpha-alumina particles to be clear; image analysis is performed, wherein the diameter of each alpha-alumina particle and the distribution state of the alumina on the paper surface are obtained through processing of image processing software; according to the obtained diameter of each alpha-alumina particle, the mass of the alpha-alumina which the surface of unit area of the impregnated paper is covered with is calculated. By means of the method, the mass of the alumina on the surface of the impregnated paper can be fast obtained, and the distribution condition of the alumina can also be observed; operation does not need to be performed under the high-temperature condition, the testing process is simple and fast, the method is suitable for real-time detection on a production line, and detection precision is sufficient.
Description
Technical field
The present invention relates to measuring for materials field, be specifically related to the detection method of a kind of spraying abrasion-proof impregnated paper surface a-aluminium oxide quantity and distribution situation.
Background technology
One of most important index of complex intensifying floor is floor surface wearing quality, and producing this wearing quality is one deck high-abrasive material---a-aluminium oxide due to complex intensifying floor surface coverage.The structure of conventional composite consolidated floor is, what the superiors covered is the abrasion-proof paper containing a-aluminium oxide in paper, and sublevel is the facing paper with grain pattern, and centre is one piece of high density fiberboard, and orlop is balance paper.Now, in order to reduce costs and improve the sharpness of floor surface pattern, eliminate abrasion-proof paper, but directly a-alumina particle is sprayed on decorative impregnated paper surface.
The wearing quality of the complex intensifying floor of manufacture of materials adheres to the number (usually reflect with the a-quality of alumina that the paper of unit area adheres to) of a-aluminium oxide on the surface with spraying impregnated paper and distribution situation has direct relation, so a-aluminium oxide is spraying the important indicator that the content in impregnated paper is wear-resistant immersion paper thus.In production practices, measure the content of spraying impregnated paper surface a-aluminium oxide in time, exactly, for control product quality tool significance.
The method that traditional detection sprays a-aluminium oxide in impregnated paper or abrasion-proof paper is calcination method, and namely get the abrasion-proof paper of certain area, in muffle furnace, high temperature sintering is to constant weight, measures the ash value of its remnants to represent the quality of unit area a-aluminium oxide.This method shortcoming is: first, need to detect under the high temperature conditions, and test process is complicated; Secondly, the test duration is long, is not suitable for and detects in real time on a production line; Finally, the data that detect the only quality of salic particle in representation unit area impregnated paper, alumina particle distribution situation on paper cannot be reflected, and whether distribution even, is directly connected to the wearing quality on floor.
Summary of the invention
The present invention is directed to the defect of prior art, provide a kind of easy to operate, applicable production line to detect, can detect fast the method for spraying abrasion-proof impregnated paper surface a-aluminium oxide quantity and distribution situation in real time.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: the method for a kind of quick detection spraying abrasion-proof impregnated paper surface a-aluminium oxide, is characterized in that: carry out according to the following steps,
The first step, sampling dyeing: the spraying abrasion-proof dipping pattern to be detected getting predetermined area is placed with in engine dyeing toner and dyes;
Second step, by dyeing after spraying abrasion-proof Impregnated paper drying after, with scanner to dyeing pattern scanning, in the computing machine be connected with scanner, form image;
3rd step, image procossing: use Photoshop photo handling software, first picture contrast is adjusted to and a-alumina particle is highlighted, then sharpening makes the edge clear of alumina particle;
4th step, image analysis: carry out edge extraction to the image that scanning obtains by image processing software, on the basis obtaining a-alumina particle edge, obtain the diameter of each a-alumina particle and the aluminium oxide distribution at paper;
5th step, calculate the volume of its spheroid according to the diameter of obtained each a-alumina particle, and then calculate its quality, then the quality of all a-aluminium oxide that unit area impregnated paper covers is added and, obtain the a-quality of alumina of unit area impregnated paper surface coverage.
Concrete image procossing and computing method: spraying a-alumina particle by bowl mill pulverize obtain, the profile of particle is approximately spherical, and the a-Alumina spheres being sprayed at impregnated paper surface be with individual layer state coverage on paper; Utilize Hough transformation principle to detect the radius of each spheroid, then calculate the volume of alumina particle, use volume to be multiplied with density, calculate the quality of each alumina particle; Concrete steps are as follows:
The first step, before detecting, first carries out pre-service to image, detection is more prone to and fast, is specially, and first, true color image is converted to gray level image and carries out histogram equalization; Then, remove noise, carry out medium filtering, according to circumstances carry out 1-2 filtering process; Utilize boundary operator carry out edge extracting to image and carry out Binary Operation, then utilize Mathematical Morphology Method to carry out filling with level and smooth to image; Finally, extract image framework, as the object detected;
Second step, records the corresponding coordinate position of each image pixel;
3rd step, adopts the normal equation (x of circle
o-a)
2+ (y
0-b)
2=r
2, wherein: (a, b) is the center of circle, r is radius of a circle; Circle on X-Y plane is transformed into a-b-r parameter space, then cross the circle of any point in image space corresponding to a three-dimensional conical surface in parameter space, the all three-dimensional conical surface that point in image space on same circle corresponds in parameter space must meet at a bit, the parameter of circle can be obtained like this by detecting this point, corresponding circle can be tried to achieve;
4th step, determines the scope (r of radius first based on experience
min, r
max), and initializing variable and Hough array; Then b gets and calculates corresponding a all over whole y value and extract effective a value, thus determines effective b value; The index value of Hough array is determined according to effective a, b; Again according to index value, constructing the number of plies by calculating accumulation is r
max-r
minhough array, find out one deck that numerical value is maximum, namely corresponding is exactly detected radius of a circle; All a, the b of the layer that the radius of trying to achieve is corresponding, its mean value is the required center of circle (a
0, b
0).
Further, logical hyperchromatic mode, the index of refraction of the tackifier in a-alumina particle in spraying abrasion-proof impregnated paper and paper and paper fiber is made a distinction, immerses immersion in dyeing liquor by impregnated paper sample to be detected and take out after 30 seconds, then put into drying box dry 30 seconds; The coloring agent adopted is water-soluble organic coloring agent, includes but not limited to the red B (C of plastics
40h
26n
2o
4) etc.
Further, by the mode of scanner scanning, by a-alumina particle in the process of impregnated paper image saliency, the scanning resolution of scanner is more than 300dpi.
Spraying abrasion-proof impregnated paper unit area aluminium oxide number calculation formula:
R
i: single alumina particle radius, m; 3.97 × 10
6: a-alumina density, g/m
3; 0.01: the area of sample paper, m
2.
The present invention is first by dyeing process, then impregnated paper surface is scanned, thus obtain the correlation parameter of paper surface oxidation alumina particles, by existing sensed image treatment technology, Data Analysis is carried out to the aluminium oxide on abrasion-proof paper surface again, can try to achieve impregnated paper surface alumina oxide quality fast, and observable goes out its distribution situation; And without the need to carrying out under the high temperature conditions, test process is simple and direct, is applicable to detect in real time on a production line, and there is enough accuracy of detection, therefore contribute to controlling Qualities of Paper Impregnated Thermosetting timely and effectively, improve the qualification rate of product in production run.
Accompanying drawing explanation
Fig. 1 is the side schematic view of a-alumina particle in impregnated paper surface distributed;
Fig. 2 is the schematic surface of a-alumina particle in impregnated paper surface distributed;
Fig. 3 is that the alumina particle solving acquisition detects schematic diagram;
Fig. 4 is impregnated paper sampling schematic diagram.
In figure, 1 is impregnated paper, and 2 is a-alumina particle, and 3 is cutting detection zone.
Embodiment
In the present embodiment, the method for described quick detection spraying abrasion-proof impregnated paper surface a-aluminium oxide, is characterized in that: carry out according to the following steps,
The first step, sampling dyeing: in the production line production run of wear-resistant immersion paper 1, at regular intervals, cut out the cutting detection zone 3 of 10 × 10cm size as dipping pattern, reference Fig. 4; Get dipping pattern to be detected to put into coloring agent dyeing and take out after 30 seconds, then put into drying box dry 30 seconds;
Second step, scan image: after the spraying abrasion-proof Impregnated paper drying after to be dyed are the scanner scanning of more than 300dpi by scanning resolution, form image;
3rd step, image procossing: use Photoshop photo handling software, first picture contrast is adjusted to and a-alumina particle is highlighted, then sharpening makes the edge clear of alumina particle;
4th step, image analysis: edge extraction is carried out to the image that scanning obtains by image processing software, on the basis obtaining a-alumina particle edge, obtain diameter and the distribution of aluminium oxide on impregnated paper 1 of each a-alumina particle 2, as depicted in figs. 1 and 2;
5th step, calculate the volume of its spheroid according to the diameter of obtained each a-alumina particle, and then calculate its quality, then the quality of all a-aluminium oxide that unit area impregnated paper covers is added and, obtain the a-quality of alumina of unit area impregnated paper surface coverage.
The a-aluminium oxide of spraying is generally pulverized by bowl mill and is obtained.The particle that this grinding mode obtains is approximately spheroidal, and the particle diameter of particle is between 150 order to 400 orders (i.e. 38-106um).The particle agglomeration of this particle size range is less, the shearing force provided by the external world, can disperse in glue preferably.When being coated in impregnated paper surface containing the glue be dispersed in wherein, aluminium oxide can evenly and with individual layer state coverage at paper.
The glue of spraying impregnated paper is melamine formaldehyde resin, and its index of refraction rate is close with a-aluminium oxide, and as directly scanned impregnated paper with scanner, alumina particle can not be distinguished with glue and body paper clearly and come.Melamine formaldehyde resin is utilized to be organic resin, easily by dyeing, and the feature that a-aluminium oxide can not be colored, with organic coloring agent to the melamine formaldehyde resin dyeing being wrapped in alumina particle in impregnated paper, the index of refraction of the index of refraction of resin and aluminium oxide is distinguished and comes; Then, by the paper scanning of scanner high light to dyeing, can clearly the alumina particle of paper be shown.
Concrete image procossing and computing method: utilize Hough transformation principle to detect the radius of each spheroid, then calculate the volume of alumina particle, use volume to be multiplied with density, calculate the quality of each alumina particle; Concrete steps are as follows:
The first step, before detecting, first carries out pre-service to image, detection is more prone to and fast, is specially, and first, true color image is converted to gray level image and carries out histogram equalization; Then, remove noise, carry out medium filtering, according to circumstances carry out 1-2 filtering process; Utilize boundary operator carry out edge extracting to image and carry out Binary Operation, then utilize Mathematical Morphology Method to carry out filling with level and smooth to image; Finally, extract image framework, as the object detected;
Scan image is converted into jpg form in a computer, with photoshop software, sharpening and contrast process is carried out to image.Sharpening degree adopts twice sharpening, ensures that grain edges can clearly show;
Second step, records the corresponding coordinate position of each image pixel;
3rd step, adopts the normal equation (x of circle
o-a)
2+ (y
0-b)
2=r
2, wherein: (a, b) is the center of circle, r is radius of a circle; Circle on X-Y plane is transformed into a-b-r parameter space, then cross the circle of any point in image space corresponding to a three-dimensional conical surface in parameter space, the all three-dimensional conical surface that point in image space on same circle corresponds in parameter space must meet at a bit, the parameter of circle can be obtained like this by detecting this point, corresponding circle can be tried to achieve;
4th step, determines the scope (r of radius first based on experience
min, r
max), and initializing variable and Hough array; Then b gets and calculates corresponding a all over whole y value and extract effective a value, thus determines effective b value; The index value of Hough array is determined according to effective a, b; Again according to index value, constructing the number of plies by calculating accumulation is r
max-r
minhough array, find out one deck that numerical value is maximum, namely corresponding is exactly detected radius of a circle; All a, the b of the layer that the radius of trying to achieve is corresponding, its mean value is the required center of circle (a
0, b
0), as shown in Figure 3.
Image method and traditional technique in measuring Comparative result:
Tradition calcination method: image method is tested the pattern stayed and weighs (being accurate to 0.0001g), be then placed in the crucible of calcination to constant weight, careful calcination, makes it carbonization.Then crucible is moved in high temperature furnace, at 575+25 DEG C in calcination to lime-ash without black carbon element, take out crucible, in exsiccator cooling after weigh, till constant weight.
Computing formula:
W
aluminium oxide: alumina content in sample, g/m
2;
G
1: the crucible weight after calcination, g;
G
2: the crucible weight filling lime-ash after calcination, g;
W
body paper: decorative paper gram paper weight, g/m
2;
X
ash content: decorative paper ash content, %;
The aluminium oxide quantitative comparison that image method and calcination method detect:
| Sample code name | 1# | 2# | 3# | 4# |
| W Image method(g/m 2) | 15.6 | 18.5 | 22.7 | 24.4 |
| W Calcination method(g/m 2) | 16.1 | 19.2 | 23.6 | 25.8 |
| Error (%) | -3.2 | -3.6 | -3.8 | 5.4 |
As seen from the above table, image method can reflect the alumina particle weight of wear-resistant immersion paper surface coverage preferably, and error is in tolerance interval.
Below the present invention be described in detail, the above, be only the preferred embodiment of the present invention, when not limiting the application's practical range, namely allly does impartial change according to the application's scope and modify, all should still belong in covering scope of the present invention.
Claims (4)
1. detect a method for spraying abrasion-proof impregnated paper surface a-aluminium oxide fast, it is characterized in that: carry out according to the following steps,
The first step, sampling dyeing: the spraying abrasion-proof dipping pattern to be detected getting predetermined area is placed with in engine dyeing toner and dyes;
Second step, scan image: after the spraying abrasion-proof Impregnated paper drying after dyeing, with the pattern scanning of scanner to dyeing, form image in the computing machine be connected with scanner;
3rd step, image procossing: use Photoshop photo handling software, first picture contrast is adjusted to and a-alumina particle is highlighted, then sharpening makes the edge clear of alumina particle;
4th step, image analysis: carry out edge extraction to the image that scanning obtains by image processing software, on the basis obtaining a-alumina particle edge, obtain the diameter of each a-alumina particle and the aluminium oxide distribution at paper;
5th step, calculate the volume of its spheroid according to the diameter of obtained each a-alumina particle, and then calculate its quality, then the quality of all a-aluminium oxide that unit area impregnated paper covers is added and, obtain the a-quality of alumina of unit area impregnated paper surface coverage.
2. the method for quick detection spraying abrasion-proof impregnated paper surface according to claim 1 a-aluminium oxide, it is characterized in that: the a-alumina particle of spraying is pulverized by bowl mill and obtained, the profile of particle is approximately spherical, and the a-Alumina spheres being sprayed at impregnated paper surface be with individual layer state coverage on paper; Utilize Hough transformation principle to detect the radius of each spheroid, then calculate the volume of alumina particle, use volume to be multiplied with density, calculate the quality of each alumina particle; Concrete steps are as follows:
The first step, before detecting, first carries out pre-service to image, detection is more prone to and fast, is specially, and first, true color image is converted to gray level image and carries out histogram equalization; Then, remove noise, carry out medium filtering, according to circumstances carry out 1-2 filtering process; Utilize boundary operator carry out edge extracting to image and carry out Binary Operation, then utilize Mathematical Morphology Method to carry out filling with level and smooth to image; Finally, extract image framework, as the object detected;
Second step, records the corresponding coordinate position of each image pixel;
3rd step, adopts the normal equation (x of circle
o-a)
2+ (y
0-b)
2=r
2, wherein: (a, b) is the center of circle, r is radius of a circle; Circle on X-Y plane is transformed into a-b-r parameter space, then cross the circle of any point in image space corresponding to a three-dimensional conical surface in parameter space, the all three-dimensional conical surface that point in image space on same circle corresponds in parameter space must meet at a bit, the parameter of circle can be obtained like this by detecting this point, corresponding circle can be tried to achieve;
4th step, determines the scope (r of radius first based on experience
min, r
max), and initializing variable and Hough array; Then b gets and calculates corresponding a all over whole y value and extract effective a value, thus determines effective b value; The index value of Hough array is determined according to effective a, b; Again according to index value, constructing the number of plies by calculating accumulation is r
max-r
minhough array, find out one deck that numerical value is maximum, namely corresponding is exactly detected radius of a circle; All a, the b of the layer that the radius of trying to achieve is corresponding, its mean value is the required center of circle (a
0, b
0).
3. the method for quick detection spraying abrasion-proof impregnated paper surface according to claim 1 a-aluminium oxide, it is characterized in that: logical hyperchromatic mode, the index of refraction of the tackifier in a-alumina particle in spraying abrasion-proof impregnated paper and paper and paper fiber is made a distinction, immerse immersion in dyeing liquor by impregnated paper sample to be detected to take out after 30 seconds, then put into drying box dry 30 seconds; The coloring agent adopted is water-soluble organic coloring agent, as: the red B (C of plastics
40h
26n
2o
4) etc.
4. the method for quick detection spraying abrasion-proof impregnated paper surface according to claim 1 a-aluminium oxide, it is characterized in that: by the mode of scanner scanning, by a-alumina particle in the process of impregnated paper image saliency, the scanning resolution of scanner is more than 300dpi.
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| CN106644846A (en) * | 2016-12-14 | 2017-05-10 | 国家林业局竹子研究开发中心 | Method for quantitatively characterizing dispersity of solid particles in coating film |
| CN117218437A (en) * | 2023-09-18 | 2023-12-12 | 中国科学院南京土壤研究所 | Method for in-situ quantification of soil particle organic matters by combining CT technology with machine learning |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106644846A (en) * | 2016-12-14 | 2017-05-10 | 国家林业局竹子研究开发中心 | Method for quantitatively characterizing dispersity of solid particles in coating film |
| CN106645176A (en) * | 2016-12-30 | 2017-05-10 | 赣州华劲纸业有限公司 | Detection method of holes and needle holes in household paper |
| CN117218437A (en) * | 2023-09-18 | 2023-12-12 | 中国科学院南京土壤研究所 | Method for in-situ quantification of soil particle organic matters by combining CT technology with machine learning |
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