CN116482117A - Online detection device and detection method for papermaking quality defects - Google Patents
Online detection device and detection method for papermaking quality defects Download PDFInfo
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- CN116482117A CN116482117A CN202310731239.5A CN202310731239A CN116482117A CN 116482117 A CN116482117 A CN 116482117A CN 202310731239 A CN202310731239 A CN 202310731239A CN 116482117 A CN116482117 A CN 116482117A
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- 238000001514 detection method Methods 0.000 title claims abstract description 75
- 230000007547 defect Effects 0.000 title claims abstract description 26
- 238000012360 testing method Methods 0.000 claims abstract description 27
- 238000005286 illumination Methods 0.000 claims abstract description 24
- 239000011521 glass Substances 0.000 claims abstract description 22
- 238000009792 diffusion process Methods 0.000 claims abstract description 20
- 238000003825 pressing Methods 0.000 claims abstract description 13
- 230000031700 light absorption Effects 0.000 claims abstract description 12
- 239000000428 dust Substances 0.000 claims abstract description 9
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 230000008033 biological extinction Effects 0.000 claims description 8
- 239000011358 absorbing material Substances 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 6
- 241001025261 Neoraja caerulea Species 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000002310 reflectometry Methods 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 2
- 238000003384 imaging method Methods 0.000 abstract description 6
- 239000010410 layer Substances 0.000 description 6
- 238000005457 optimization Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/8901—Optical details; Scanning details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/8914—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the material examined
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/94—Investigating contamination, e.g. dust
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/8914—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the material examined
- G01N2021/8917—Paper, also ondulated
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
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- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Textile Engineering (AREA)
- Engineering & Computer Science (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The invention belongs to the technical field of papermaking, in particular to a papermaking quality defect online detection device and a detection method, wherein the papermaking quality defect online detection device comprises a detection box, transparent glass is installed in the detection box, a plurality of strip lamps, ultraviolet spot lamps and refraction test structures are sequentially installed below the transparent glass along the direction from an inlet end to an outlet end of the detection box, a plurality of light absorption plates are installed above the transparent glass, and a plurality of adjustable cameras, ultraviolet cameras and light absorption pressing plates are sequentially installed from the inlet end to the outlet end of the detection box; the strip lamp provided by the invention has the advantages that the diffusion areas are overlapped, so that the illumination in the diffusion areas is enhanced, the imaging quality is not reduced due to large illumination change in the shooting range when the adjustable camera shoots, and the brightness of the strip lamp is sequentially reduced, so that photos with the appearance and inner layer defects of paper can be clearly seen in a plurality of photos with different illumination, and the dust degree of the paper is known.
Description
Technical Field
The invention belongs to the technical field of papermaking, and particularly relates to an online detection device and a detection method for papermaking quality defects.
Background
In the papermaking field, a paper machine generally comprises a wire section forming system, a squeezing system, a drying system, a paper winding system, a slitting and rewinding system and the like, and after paper winding, appearance defects or inner layer (interlayer) defects of paper such as stains, black blocks, black dust, stains in interlayers, stains, dirt blocks and the like, and cracks, holes and the like on the paper surface need to be detected.
For example, chinese patent publication No. CN105203557B discloses an online detection system for paper quality of an electronic paper tape, which is provided with an online detection system for surface defects between a scanner and a second guide roller, so as to guide an operator to find a cause of the detected quality defects and perform effective treatment;
however, the above patent does not mention that the light source irradiates on the paper to form diffuse reflection due to the surface roughness of the paper, and further causes the problem that the imaging quality of the camera is reduced due to the larger uniformity of illuminance, so there is room for improvement.
Disclosure of Invention
Aiming at the problems that in the prior art, due to the surface roughness of paper, diffuse reflection is formed on the paper by the irradiation of a light source, and the imaging quality of a camera is reduced, the invention provides the following technical scheme:
an on-line detection device for papermaking quality defects, comprising: the detection box, the entrance point and the exit end of detection box all rotate and are connected with the bearing roller, the compression roller is installed to the top of bearing roller, the internally mounted of detection box has transparent glass, a plurality of bar lamps, ultraviolet spot light and refraction test structure are installed in proper order along detection box entrance point to exit end direction to transparent glass's below, a plurality of extinction boards are installed to transparent glass's top, a plurality of extinction boards separate detection box inner space into a plurality of darkrooms, a plurality of adjustable cameras are installed in proper order along detection box entrance point to exit end direction to the inside of a plurality of darkrooms, ultraviolet camera and extinction clamp plate, adjustable camera and corresponding bar lamp assorted, ultraviolet camera and ultraviolet spot light assorted, extinction clamp plate and refraction test structure assorted.
As the preference of above-mentioned technical scheme, the top fixedly connected with of bar lamp is in the light shield to one side, and the diffusion district of arbitrary bar lamp outgoing light overlaps with the diffusion district of adjacent bar lamp outgoing light, and the luminance of a plurality of bar lamps reduces in proper order from the entrance point and the exit end of detection case, and the top fixedly connected with of ultraviolet shot-light is in the light shield directly.
As the preference of above-mentioned technical scheme, refraction test structure includes two relative arc framves in position, and sliding connection has blue ray lamp and blue light sensor respectively on two arc framves, and blue ray lamp and blue light sensor angle are relative, and electric telescopic handle is installed to the bottom of detecting the incasement wall, and electric telescopic handle's top fixedly connected with spacing, the equal fixedly connected with spring telescopic handle in spacing both sides, and the one end of spring telescopic handle is articulated with the bottom that corresponds blue ray lamp or blue light sensor.
As a preferred aspect of the above-described technical solution, the light-absorbing plate is positioned above the diffusion region of the corresponding bar-shaped lamp, and the surface of the light-absorbing plate is coated with a black light-absorbing material.
As the optimization of the technical scheme, the adjustable camera is a manual diaphragm adjusting camera, and the diaphragm sizes of the adjustable cameras are adjusted to be the same.
As the optimization of the technical scheme, one side of the light-absorbing pressing plate is in sliding connection with the corresponding light-absorbing plate, the surface of the light-absorbing pressing plate is coated with black light-absorbing materials, and the bottom end of the light-absorbing pressing plate is attached to an external paper roll.
As the preference of above-mentioned technical scheme, one end of two bearing rollers all alternates one side of detecting the case, and has cup jointed the drive belt between the tip of two bearing rollers, and the opposite side of detecting the case is alternated to the other end of one of them bearing roller, and its tip fixedly connected with motor, and the both ends of compression roller rotate respectively and peg graft the both sides of detecting the case, and its tip rotates and cup joints the roll adjustment structure.
As the optimization of the technical scheme, the top end height of the transparent glass is the same as the top end height of the carrier roller, the two ends of the detection box are hinged with box plates, and the box plates are opened outwards.
According to the detection method of the online detection device for the papermaking quality defects, the method comprises the following steps:
s1: the external roll paper enters the detection box along a gap between the carrier roller and the compression roller at the inlet end of the detection box, is attached to the top end of the transparent glass to move, and then moves out of the gap between the carrier roller and the compression roller at the outlet end of the detection box;
s2: when the external roll paper moves in the detection box, the external roll paper sequentially passes through the upper parts of the plurality of strip lamps, and the diffusion areas of the strip lamps below the transparent glass are overlapped, and the brightness of the strip lamps is sequentially reduced, so that the picture shot by the adjustable camera above the external roll paper has uniform reduction of illumination rule, and the aperture size of the adjustable camera is consistent, so that the picture with uniform reduction of illumination rule can be reversely deduced under what illumination, light cannot penetrate through paper, the transparency of the paper can be calculated, and the picture with uniform reduction of illumination rule can be found out, so that the stain and the color spot on the paper can be clearly seen, the defects of the appearance and the inner layer of the paper can be known, and the dust degree of the paper can be known;
s3: when the external roll paper passes through the ultraviolet camera, the illumination of the adjacent strip-shaped lamp is low, and the light absorption plate absorbs light, so that the darkroom corresponding to the ultraviolet camera is not greatly influenced, and the picture shot by the ultraviolet camera can clearly show the trend of paper fibers and the average degree of paper fiber distribution, so that the paper longitudinal and transverse directions and the paper uniformity can be known;
s4: when outside stock form passes through refraction test structure region, the light absorption clamp plate laminating scroll has absorbed the light of transmission paper, and the light that jets out from the blue ray lamp is caught by blue light sensor after the paper reflection, can know the reflectivity of paper surface to the blue light to can calculate paper whiteness.
The beneficial effects of the invention are as follows:
(1) According to the strip-shaped lamp provided by the invention, the diffusion areas of the strip-shaped lamps are overlapped, the brightness of the strip-shaped lamps is sequentially reduced, and the illumination in the diffusion areas is enhanced due to the overlapping of the diffusion areas, so that a picture shot by an adjustable camera above the external roll paper cannot be reduced in imaging quality due to large illumination change in a shooting range, and a picture capable of clearly seeing stains and color spots on paper can be found in a plurality of pictures with uniformly reduced illumination rule, so that defects of the appearance and the inner layer of the paper are known, and the dust degree of the paper is known;
(2) The invention divides the inner space of the detection box into a plurality of darkrooms through the light absorption plate, creates a good testing environment, tests the dust degree and transparency of paper through the adjustable camera and the corresponding strip lamp, tests the paper longitudinal and transverse directions and the paper uniformity through the ultraviolet camera and the ultraviolet spot lamp, and tests the paper whiteness through the light absorption pressing plate and the refraction testing structure.
Drawings
FIG. 1 is a schematic view showing the overall structure of the present invention;
FIG. 2 is a schematic view showing the structure of a press roll of the present invention;
FIG. 3 shows a schematic view of the position of a light absorbing plate of the present invention;
fig. 4 shows a schematic view of the refraction test structure of the present invention.
In the figure: 1. a detection box; 101. a box plate; 2. a carrier roller; 201. a transmission belt; 202. a motor; 3. a press roller; 301. a distance adjusting structure; 4. transparent glass; 5. a bar-shaped lamp; 501. an inclined light shield; 6. an ultraviolet spot light; 601. a direct light shield; 7. a refraction test structure; 701. an arc frame; 702. a blue light lamp; 703. a blue light sensor; 704. an electric telescopic rod; 705. a limiting frame; 706. a spring telescoping rod; 8. a light absorption plate; 9. an adjustable camera; 10. an ultraviolet camera; 11. and (5) a light-absorbing pressure plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the embodiments.
Example 1
A large barrel part boring tool, as shown in fig. 1 to 4, comprising: the detection box 1, the entrance point and the exit point of detection box 1 all rotate and are connected with bearing roller 2, the compression roller 3 is installed to the top of bearing roller 2, the internally mounted of detection box 1 has transparent glass 4, a plurality of bar lamps 5 are installed in proper order to exit point direction along detection box 1 entrance point to transparent glass 4's below, ultraviolet shot-light 6 and refraction test structure 7, a plurality of light-absorbing plates 8 are installed to transparent glass 4's top, a plurality of light-absorbing plates 8 separate detection box 1 inner space into a plurality of darkrooms, a plurality of adjustable cameras 9 are installed in proper order to exit point direction along detection box 1 entrance point to a plurality of darkrooms's inside, ultraviolet camera 10 and light-absorbing clamp plate 11, adjustable camera 9 matches with corresponding bar lamp 5, ultraviolet camera 10 matches with ultraviolet shot-light 6, light-absorbing clamp plate 11 matches with refraction test structure 7.
The invention divides the inner space of the detection box 1 into a plurality of darkrooms through the light absorption plate 8, creates a good testing environment, tests the dust degree and transparency of paper through the adjustable camera 9 and the corresponding strip lamp 5, tests the paper longitudinal and transverse directions and the paper uniformity through the ultraviolet camera 10 and the ultraviolet spotlight 6, and tests the paper whiteness through the light absorption pressing plate 11 and the refraction testing structure 7.
Referring to fig. 3 of the specification, the top end of the strip lamp 5 is fixedly connected with an inclined light blocking cover 501, the diffusion area of light emitted by any strip lamp 5 coincides with the diffusion area of light emitted by adjacent strip lamps 5, the brightness of a plurality of strip lamps 5 is sequentially reduced from the inlet end and the outlet end of the detection box 1, and the top end of the ultraviolet spot lamp 6 is fixedly connected with a straight light blocking cover 601.
The invention sets the strip lamp 5, so that the diffusion area of the light is also strip-shaped, the illumination intensity in the diffusion area is enhanced because the diffusion areas are overlapped, therefore, the imaging quality is not reduced because of the large illumination intensity change in the shooting range when the adjustable camera 9 shoots, and the brightness of the strip lamp 5 is sequentially reduced, therefore, photos which can clearly see the appearance of the paper and defects of the inner layer can be found in a plurality of photos with different illumination intensities, and the dust degree of the paper is known.
Referring to fig. 3 and 4 of the specification, the refraction test structure 7 includes two arc frames 701 with opposite positions, the two arc frames 701 are respectively and slidably connected with a blue light lamp 702 and a blue light sensor 703, the blue light lamp 702 and the blue light sensor 703 are opposite in angle, an electric telescopic rod 704 is installed at the bottom end of the inner wall of the detection box 1, the top end of the electric telescopic rod 704 is fixedly connected with a limiting frame 705, two sides of the limiting frame 705 are fixedly connected with spring telescopic rods 706, and one end of each spring telescopic rod 706 is hinged with the bottom end of the corresponding blue light lamp 702 or blue light sensor 703.
When the invention is used, the limiting frame 705 and the spring telescopic rod 706 can be sequentially driven by stretching the electric telescopic rod 704, so that the positions of the blue light lamp 702 and the blue light sensor 703 on the arc frame 701 are changed, the incident angle and the refraction angle of light emitted by the blue light lamp 702 are changed, the refraction test structure 7 can select the optimal test angle according to the paper property, and multiple groups of data can be tested for comparison and correction.
Referring to fig. 3 and 4 of the specification, the light absorbing plate 8 is positioned above the diffusion area of the corresponding bar lamp 5, and the surface of the light absorbing plate 8 is coated with black light absorbing material, so that excessive light can be absorbed, the light can be prevented from being reflected at will in a darkroom, and finally the imaging quality is affected.
Referring to fig. 3 of the specification, the adjustable camera 9 is a manual aperture adjusting camera, and compared with an automatic aperture adjusting camera, the adjustable camera 9 has lower price, can save equipment cost, has the same aperture size adjustment, and can be used as a reference for calculating the transparency of paper subsequently.
Referring to fig. 3 of the specification, one side of the light-absorbing pressing plate 11 is slidably connected with the corresponding light-absorbing plate 8, the position can be adjusted according to the thickness and the layer number of the paper, the surface of the light-absorbing pressing plate 11 is coated with black light-absorbing materials, light transmitted out of the paper can be absorbed, light reflected by the paper is reserved, the whiteness of the paper is convenient to calculate subsequently, and the bottom end of the light-absorbing pressing plate 11 is attached to an external paper roll.
Referring to fig. 1 and 3 of the specification, one end of each of the two carrier rollers 2 is inserted into one side of the detection box 1, a transmission belt 201 is sleeved between the ends of the two carrier rollers 2, the other end of one carrier roller 2 is inserted into the other side of the detection box 1, the ends of the carrier rollers 3 are fixedly connected with motors 202, the two ends of the carrier rollers 3 are respectively rotated to be inserted into the two sides of the detection box 1, the ends of the carrier rollers are rotated to be sleeved with distance adjusting structures 301, the top end height of the transparent glass 4 is the same as the top end height of the carrier rollers 2, the two ends of the detection box 1 are hinged with box plates 101, the box plates 101 are opened outwards, the box plates 101 can be used for checking the carrier rollers 2 and the carrier rollers 3 when opened, and also can be used for adjusting the positions of the light absorbing pressure plates 11, and can shield external light when closed, so that a beneficial condition is provided for the construction of a darkroom.
According to the detection method of the online detection device for the papermaking quality defects, the method comprises the following steps:
s1: the external roll paper enters the detection box 1 along a gap between the carrier roller 2 and the compression roller 3 at the inlet end of the detection box 1, is attached to the top end of the transparent glass 4 to move, and then moves out from the gap between the carrier roller 2 and the compression roller 3 at the outlet end of the detection box 1;
s2: when the external roll paper moves in the detection box 1, the external roll paper sequentially passes through the upper parts of the plurality of strip lamps 5, and the diffusion areas of the strip lamps 5 below the transparent glass 4 are overlapped, and the brightness of the strip lamps 5 is sequentially reduced, so that the picture shot by the adjustable camera 9 above the external roll paper has uniform reduction of illumination rule, and the aperture size of the adjustable camera 9 is consistent, so that the pictures with uniform reduction of illumination rule can be reversely deduced under what illumination, the light cannot penetrate through paper, the transparency of the paper can be calculated, and the pictures with uniform reduction of illumination rule can be found out, so that the stain and the color spot on the paper can be clearly seen, the defects of the appearance and the inner layer of the paper can be known, and the dust degree of the paper can be known;
s3: when the external roll paper passes through the ultraviolet camera 10, the illumination of the adjacent strip lamp 5 is low, and the light absorption plate 8 absorbs light, so that the darkroom corresponding to the ultraviolet camera 10 is not greatly influenced, and the picture shot by the ultraviolet camera 10 can clearly show the trend of paper fibers and the average degree of paper fiber distribution, namely the paper longitudinal and transverse directions and the paper uniformity can be known;
s4: when the external roll paper passes through the refraction test structure 7 area, the light absorbing pressing plate 11 is attached to the roll paper, light transmitted by paper is absorbed, light emitted from the blue light lamp 702 is captured by the blue light sensor 703 after being reflected by the paper, and the reflectivity of the surface of the paper to blue light can be known, so that the whiteness of the paper can be calculated.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting.
Claims (9)
1. An on-line detection device for paper quality defects, which is characterized by comprising: the detection box (1), the entrance point and the exit end of detection box (1) all rotate and are connected with bearing roller (2), compression roller (3) are installed to the top of bearing roller (2), the internally mounted of detection box (1) has transparent glass (4), a plurality of bar lamps (5), ultraviolet shot-light (6) and refraction test structure (7) are installed in proper order along detection box (1) entrance point to exit end direction to the below of transparent glass (4), a plurality of extinction boards (8) are installed to the top of transparent glass (4), a plurality of extinction boards (8) separate detection box (1) inner space into a plurality of camera, a plurality of camera (10) and clamp plate (11) are installed in proper order along detection box (1) entrance point to exit end direction, a plurality of camera (9) and extinction lamp (5) assorted, ultraviolet camera (10) and ultraviolet shot-light (6) assorted clamp plate, extinction board (11) assorted with refraction test structure (7).
2. The online detection device for the defects of the papermaking quality according to claim 1, wherein the top end of each strip lamp (5) is fixedly connected with an inclined light blocking cover (501), a diffusion area of light emitted by any strip lamp (5) coincides with a diffusion area of light emitted by adjacent strip lamps (5), the brightness of a plurality of strip lamps (5) is sequentially reduced from the inlet end and the outlet end of the detection box (1), and the top end of each ultraviolet spot lamp (6) is fixedly connected with a straight light blocking cover (601).
3. The online detection device for paper making quality defects according to claim 1, wherein the refraction test structure (7) comprises two arc frames (701) with opposite positions, the two arc frames (701) are respectively connected with a blue light lamp (702) and a blue light sensor (703) in a sliding manner, the blue light lamp (702) and the blue light sensor (703) are opposite in angle, an electric telescopic rod (704) is installed at the bottom end of the inner wall of the detection box (1), a limiting frame (705) is fixedly connected to the top end of the electric telescopic rod (704), spring telescopic rods (706) are fixedly connected to two sides of the limiting frame (705), and one end of each spring telescopic rod (706) is hinged to the bottom end of the corresponding blue light lamp (702) or blue light sensor (703).
4. A papermaking quality defect online detection device according to claim 1, characterized in that the light absorbing plate (8) is positioned above the diffusion area of the corresponding strip lamp (5), and the surface of the light absorbing plate (8) is coated with black light absorbing material.
5. The online detection device for papermaking quality defects according to claim 1, wherein the adjustable camera (9) is a manually adjustable aperture camera, and the aperture size of the adjustable camera (9) is adjusted to be the same.
6. The online detection device for papermaking quality defects according to claim 1, wherein one side of the light-absorbing pressing plate (11) is in sliding connection with a corresponding light-absorbing plate (8), the surface of the light-absorbing pressing plate (11) is coated with black light-absorbing materials, and the bottom end of the light-absorbing pressing plate (11) is attached to an external paper roll.
7. The online detection device for papermaking quality defects according to claim 1, wherein one end of each of two carrier rollers (2) is inserted into one side of a detection box (1), a transmission belt (201) is sleeved between the end parts of the two carrier rollers (2), the other end of one carrier roller (2) is inserted into the other side of the detection box (1), the end parts of the carrier rollers are fixedly connected with motors (202), two ends of each of the press rollers (3) are respectively rotated to be inserted into two sides of the detection box (1), and the end parts of the press rollers are rotatably sleeved with a distance adjusting structure (301).
8. The online detection device for papermaking quality defects according to claim 1, wherein the top end of the transparent glass (4) is the same as the top end of the carrier roller (2), two ends of the detection box (1) are hinged with box plates (101), and the box plates (101) are opened outwards.
9. A method for detecting a paper quality defect on-line detecting apparatus according to any one of claims 1 to 8, characterized in that the method comprises the steps of:
s1: the external roll paper enters the detection box (1) along a gap between the carrier roller (2) and the compression roller (3) at the inlet end of the detection box (1), is attached to the top end of the transparent glass (4) to move, and then is moved out of the gap between the carrier roller (2) and the compression roller (3) at the outlet end of the detection box (1);
s2: when the external roll paper moves in the detection box (1), the external roll paper sequentially passes through the upper parts of the strip lamps (5), the diffusion areas of the strip lamps (5) below the transparent glass (4) are overlapped, the brightness of the strip lamps (5) is sequentially reduced, therefore, the picture shot by the adjustable camera (9) above the external roll paper is uniformly reduced in illumination rule, and the aperture size of the adjustable camera (9) is uniform, so that the transparency of the paper can be calculated by reversely pushing out pictures with uniformly reduced illumination rule from the pictures with uniformly reduced illumination rule, and the pictures with clearly visible stain and color spot on the paper can be found from the pictures with uniformly reduced illumination rule, thereby knowing the appearance of the paper and the dust degree of the inner layer;
s3: when the external roll paper passes through the ultraviolet camera (10), the illumination of the adjacent strip-shaped lamp (5) is low, and the light absorption plate (8) absorbs light, so that a darkroom corresponding to the ultraviolet camera (10) is not greatly influenced, and a picture shot by the ultraviolet camera (10) can clearly show the trend of paper fibers and the average degree of paper fiber distribution, namely the longitudinal and transverse directions of the paper and the uniformity of the paper can be known;
s4: when outside stock form passes through refraction test structure (7) regional, the light absorption clamp plate (11) laminating scroll has absorbed the light of transmission paper, and the light that jets out from blue ray lamp (702) is caught by blue light sensor (703) after the paper reflection, can know the reflectivity of paper surface to the blue light to can calculate paper whiteness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310731239.5A CN116482117B (en) | 2023-06-20 | 2023-06-20 | Online detection device and detection method for papermaking quality defects |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310731239.5A CN116482117B (en) | 2023-06-20 | 2023-06-20 | Online detection device and detection method for papermaking quality defects |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116482117A true CN116482117A (en) | 2023-07-25 |
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