CN108548818A - A kind of method and system of detection sheet uniformity - Google Patents
A kind of method and system of detection sheet uniformity Download PDFInfo
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- CN108548818A CN108548818A CN201810393442.5A CN201810393442A CN108548818A CN 108548818 A CN108548818 A CN 108548818A CN 201810393442 A CN201810393442 A CN 201810393442A CN 108548818 A CN108548818 A CN 108548818A
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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
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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
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
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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
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
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Abstract
The present invention relates to paper for daily use processing technique fields, disclose a kind of method and system of detection sheet uniformity.This method includes：A slurry sample is extracted, slurry sample is placed in a storage container；The slurry sample in storage container is scanned using image collecting device, to acquire the poly- image of slurry wadding of slurry sample；The corresponding speckle index of the poly- image of slurry wadding is obtained, speckle index is used to describe the uniformity of slurry sample.By the above-mentioned means, the present invention can improve the lag sex chromosome mosaicism of sheet uniformity testing result.
Description
Technical field
The present invention relates to paper for daily use processing technique field, a kind of method more particularly to detection sheet uniformity and
System.
Background technology
Sheet uniformity is an important physical index for evaluating paper quality, influences all physics and optical property
Average value and data homogeneity.The quality of sheet uniformity not only influences the appearance of paper, but also influences the various objects of paper
The harmony of rationality energy average and numerical value.The evenness of paper is bad, then the thickness of paper is also uneven, and the surface of paper is easy volume
It is bent.Coating will cause the difficulty produced and waste product occurs on this paper.The structure of paper is more uneven, the surface of paper
Dyeing is also more uneven, is easy to form the cloudy look-through of different tones, and the dyeing of paper thicker portion is deep, and thin place dyeing
It is shallower.When the evenness of paper is poor, the mechanical strength of paper, which declines fracture length, to be reduced, and folding strength and tearability reduce；And
Its air permeability, transparency, opacity, absorbent properties, electrical insulation properties and many other performances also have an impact.
The appraisal procedure of sheet uniformity is embodied by paper intertexture index at present, and the result according to intertexture index carries out
Adjustment, to improve the uniformity situation of paper.And the uniformity of current high speed culture paper paper, the paper machine paper roll change of lap such as need
Afterwards, sampling could obtain after being detected.And current large-scale folder net high speed culture paper, the nearly 10m of breadth, speed are up to
1600m/min, the weight of single paper roll is up to 60 tons or so, it is only necessary to the process time of 45min or so.It is detected if being interweaved by paper
It was found that sheet uniformity is abnormal, then feeds back to the adjustment of paper machine control room to improve sheet uniformity, process needs 2~3 small
When reaction time.The uniformity abnormal sheet that paper machine produces in reaction time will reach at least 200 tons or more.Therefore at present
The assessment mode lag of sheet uniformity is serious.
Invention content
In view of this, the invention mainly solves the technical problem of providing a kind of method of detection sheet uniformity and being
System, can improve the lag sex chromosome mosaicism of sheet uniformity testing result.
In order to solve the above technical problems, one aspect of the present invention is：A kind of detection sheet uniformity is provided
Method, this method includes：A slurry sample is extracted, slurry sample is placed in a storage container；Utilize image collecting device
The slurry sample in storage container is scanned, to acquire the poly- image of slurry wadding of slurry sample；It is corresponding to obtain the poly- image of slurry wadding
Speckle index, speckle index are used to describe the uniformity of slurry sample.
In one embodiment of this invention, include before the step of extracting a slurry sample：Beating is carried out to slurry sample
Processing and addition chemicals auxiliary agent.
In one embodiment of this invention, slurry wads a quilt with cotton poly- image as the poly- image of wadding of pulp fiber in slurry sample, extraction
One slurry sample will include after step that slurry sample is placed in a storage container：Storage container is rocked, so that storage container
In pulp fiber be uniformly distributed in storage container；Wherein, slurry sample is at least covered with storage container bottom.
In one embodiment of this invention, slurry sample dosage is 100 milliliters.
In one embodiment of this invention, storage container is transparent material, includes after the step of rocking storage container：
Cover board is placed at the top of storage container, cover board is different from the color of pulp fiber；It is scanned in storage container using image collecting device
Slurry sample, with acquire slurry sample slurry wad a quilt with cotton poly- image the step of specifically include：Image collecting device is figure with cover board
As background, the poly- image of wadding for obtaining the pulp fiber that storage container bottom is reflected is the poly- image of slurry wadding.
In one embodiment of this invention, obtain slurry wad a quilt with cotton poly- image corresponding speckle index the step of specifically include：
A poly- image of sub- slurry wadding is obtained in the poly- image of slurry wadding；Obtain the defects of the poly- image of the sub- slurry wadding size of space；Wherein, it lacks
It is the size of space that sub- slurry is wadded a quilt with cotton in poly- image between different pulp fibers to fall into the size of space；It is calculated by interpolated value Shift Method
To the acquired corresponding speckle indicatrix of the defect size of space, and speckle index is obtained by speckle indicatrix, to
The uniformity of slurry sample is described；Wherein, the uniformity of slurry sample is inversely proportional with speckle index.
In one embodiment of this invention, sub- slurry wad a quilt with cotton poly- image dimensions be 10cm*10cm, and sub- slurry wad a quilt with cotton
Poly- image area is less than the poly- image of slurry wadding.
In order to solve the above technical problems, another technical solution that the present invention uses is：It is uniform to provide a kind of detection paper
The system of degree, the system include processor, image collecting device and storage container, and processor is connect with image collecting device,
Storage container is used to scan the slurry sample in storage container placed on it for holding slurry sample, image collecting device,
To acquire the poly- image of slurry wadding of slurry sample and slurry is wadded a quilt with cotton poly- image transmitting to processor, processor obtains the poly- figure of slurry wadding
As corresponding speckle index, the uniformity for describing slurry sample.
In one embodiment of this invention, storage container is transparent glass material, and storage container is that basal diameter is 180mm
Cylindric groove body.
In one embodiment of this invention, image collector is set to scanner, and the scanning resolution of image collecting device is
Any one in 600ppi, 1200ppi and 2400ppi.
The beneficial effects of the invention are as follows：It is different from the prior art, the method for detection sheet uniformity provided by the present invention, packet
One slurry sample of extraction is included, slurry sample is placed in a storage container；It is scanned in storage container using image collecting device
Slurry sample, to acquire the poly- image of slurry wadding of slurry sample；Obtain the corresponding speckle index of the poly- image of slurry wadding, speckle index
The uniformity for describing slurry sample.Since the detection sample needed for detection sheet uniformity method provided by the present invention is paper
The slurry sample opened, rather than molding paper.By the poly- image of slurry wadding reflected to slurry sample, calculating gets this
The corresponding speckle index of the poly- image of slurry wadding, is described with the uniformity to the slurry sample, can be directly from speckle index
The uniformity of pair also unformed slurry sample for product paper judges, can be detected in advance to the uniformity of product paper
Judge, to which solution carries out asking for testing result lag caused by uniformity detection judgement now with technology for molding paper
Topic, and then improve the lag sex chromosome mosaicism of sheet uniformity testing result.
Description of the drawings
Fig. 1 is the flow diagram of one embodiment of method of present invention detection sheet uniformity；
Fig. 2 is the flow diagram of another embodiment of method of present invention detection sheet uniformity；
Fig. 3 is that pulp fiber is wadded a quilt with cotton the structural schematic diagram of poly- state first embodiment in slurry sample of the present invention；
Fig. 4 is that pulp fiber is wadded a quilt with cotton the structural schematic diagram of poly- state second embodiment in slurry sample of the present invention；
Fig. 5 is that pulp fiber is wadded a quilt with cotton the structural schematic diagram of poly- state 3rd embodiment in slurry sample of the present invention；
Fig. 6 is that pulp fiber is wadded a quilt with cotton the structural schematic diagram of poly- state fourth embodiment in slurry sample of the present invention；
Fig. 7 is the structural schematic diagram of one embodiment of system of present invention detection sheet uniformity；
Fig. 8 is the structural schematic diagram of one embodiment of storage container of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes.
Sheet uniformity refers to the degree that is evenly distributed of the solid constituents such as fiber and filler, colloid in paper, including fiber
Degree of scatter, the spatial orientation degree of fiber and mode and solid component be close to degree.
The uniformity of the paper situation poly- with pulp suspension (i.e. slurry) dispersion wadding possesses close relationship.If in paper
During slurry streaming is formed with paper, the poly- degree of fleeces is relatively low, forms sheet uniformity with regard to relatively good, otherwise just poor.
Therefore paper in process of production enter head box when the poly- situation of wadding, directly influence the uniformity of paper.It is papermaking that wadding is poly-
One of most important phenomenon in the process while influencing paper machine runnability, and causes most directly to influence on sheet uniformity.
Wadding is poly- to reflect fiber and fiber fines accumulate agglomerating, blocking trend.Fleeces, which gathers, influences page in online molding, thus
Influence its uniformity.The poly- effect of wadding can improve the retention and drainability of fiber fines and filler, help to improve the life of paper machine
Produce efficiency.However, floc sedimentation occurs in the poly- increased paper pulp that also results in of effect of wadding, sheet uniformity can reduce.So must be wet
Portion is controlled and adjusts to poly- situation of wadding a quilt with cotton so that it is poly- to paper that wadding is reduced while ensureing that retention and water filtering performance improve
The influence of the uniformity.Therefore accurate quantitative evaluation is carried out to pulp flocculation situation, can be achieved with the pre- in advance of sheet uniformity
Survey and management and control.
Referring to Fig. 1, Fig. 1 is the flow diagram of one embodiment of method of present invention detection sheet uniformity.
S101：A slurry sample is extracted, slurry sample is placed in a storage container；
To improve the lag sex chromosome mosaicism of sheet uniformity testing result, the present embodiment illustrates the side of detection sheet uniformity
Method is started with from the paper manufacturing process detected residing for sample, to improve the hysteresis quality of sheet uniformity testing result.The present embodiment is carried
Take the slurry sample before the sample that the uniformity detects is paper molding, i.e., the pulp flocculation situation before being molded to paper
Carry out the check and evaluation of product sheet uniformity.Slurry sample can reflect at it by its molding product sheet uniformity enough
Under the premise of, it is product paper since slurry sample is also unformed, its uniformity can be detected before paper molding, phase
It is detected for product paper after molding compared with the prior art, the present embodiment illustrates the method energy of detection sheet uniformity
Enough uniformitys for feeding back slurry sample more in time, so as to improve the lag sex chromosome mosaicism of sheet uniformity testing result.It can manage
Slurry sample is placed in storage container, after extracting slurry sample in order to carry out subsequent testing process by solution.
S102：The slurry sample in storage container is scanned using image collecting device, the slurry to acquire slurry sample is wadded a quilt with cotton
Poly- image；
In the present embodiment, the uniformity of slurry sample is detected in the way of image analysis.Specially utilize
Have the slurry sample in the image collecting device scanning storage container of figure acquisition function, acquires the corresponding slurry of the slurry sample
The poly- image of material wadding.Slurry wads a quilt with cotton poly- image as pulp fiber and the Assembled distribution situation map of other solid components in slurry sample
Picture can obtain the data for weighing the slurry sample uniformity, with the uniformity to slurry sample in wadding a quilt with cotton poly- image from slurry
It is detected.
S103：The corresponding speckle index of the poly- image of slurry wadding is obtained, speckle index is used to describe the uniformity of slurry sample；
In the present embodiment, it is wadded a quilt with cotton after poly- image, is needed pair using the slurry of image acquisition device to slurry sample
The poly- image of slurry wadding carries out mathematical analysis, to obtain the data for weighing the slurry sample uniformity.Specially from the poly- image of slurry wadding
In by mathematical analysis, obtain the slurry and wad a quilt with cotton the corresponding speckle index of poly- image, the speckle index is for describing the poly- figure of slurry wadding
As the uniformity of the slurry sample reflected.The uniformity of slurry sample can reflect by the uniform of its molding product paper
Degree.According to the uniformity situation of slurry sample, with to slurry component and corresponding paper manufacturing process be adjusted, to improve slurry
Expect the uniformity of sample, and then improves the uniformity by the molding product paper of the slurry sample.
Above as can be seen that since the detection sample needed for detection sheet uniformity method provided by the present invention is paper
Slurry sample, rather than molding paper.By the poly- image of slurry wadding reflected to slurry sample, calculating gets the slurry
The corresponding speckle index of poly- image of wadding a quilt with cotton, is described with the uniformity to the slurry sample, can directly from speckle exponent pair also
The uniformity of the unformed slurry sample for product paper is judged, can be detected in advance to the uniformity of product paper
Judge, to which solution carries out asking for testing result lag caused by uniformity detection judgement now with technology for molding paper
Topic, and then improve the lag sex chromosome mosaicism of sheet uniformity testing result.
Referring to Fig. 2, Fig. 2 is the flow diagram of another embodiment of method of present invention detection sheet uniformity.
S201：Beating processing and addition chemicals auxiliary agent are carried out to slurry sample；
In the present embodiment, to improve the lag sex chromosome mosaicism of sheet uniformity testing result, it is not to extract detection sample
It is shaped to the paper pulp raw material (i.e. slurry sample) of product paper, instead of being interleaved finger to molding product paper in the prior art
Number assessment, to avoid the processing procedure duration that paper pulp molding is consumed by product paper, causes to produce to detect the uniformity of product paper
Product sheet uniformity testing result lag is serious so that when detecting that product sheet uniformity is unsatisfactory for manufacture and requires, production stream
Waterline has produced the product paper of a large amount of uniformity defects.Therefore compared to the prior art, the present embodiment is former by detecting paper pulp
The uniformity of material can understand product paper in paper manufacturing process in advance to characterize the uniformity by its molding product paper
Uniformity situation, the reaction time of pulp compositions and processing procedure is adjusted so as to shorten paper making equipment, and high degree reduces papermaking and sets
The yield of faulty goods in the standby reaction time.
It is the uniformity situation for making the uniformity of slurry sample be represented enough by its shaped article paper in the present embodiment, it should
Slurry sample need to complete the processing of the beating in paper manufacturing process and the addition of chemicals auxiliary agent.Usual slurry sample extracts from papermaking
After flowing through pressurized screen in processing procedure, into head box before paper pulp, since the paper pulp of the process position has been completed to own
Beating processing and the addition of chemicals auxiliary agent, the paper pulp uniformity of the position directly influences by the production after its dehydration forming
The uniformity of product paper, therefore slurry sample is derived from the paper pulp of the position, the uniformity of slurry sample is represented enough by its molding
The uniformity situation of product paper.
Beating processing is also known as beaten, and is to handle the paper pulp fiber to suspend in water using mechanism, is made it have adaptation
Required characteristic is produced on a papermaking machine, and produced paper is enable to reach the operating process of prospective quality.Utilize physics
Method carries out machinery to paper pulp fiber in water or fluid is handled, makes fiber by shearing force, change the form of fiber, make paper pulp
Certain characteristics are obtained, to ensure that the paper being copied into reaches expected quality requirement.During beating fiber in addition to being sheared by parts,
Outside the effects that rubbing and combing, while the cell wall of fiber is also subjected to displacement, deforms and the swollen that absorbs water, generation phenomena such as rupture
Fibrillating makes paper pulp have flexibility, plasticity, also makes the hydroxyl increase in cellulose molecular chain and hydrogen chain combination chance,
Improve interfibrous binding force.It is acted on by mashing, shiny beating and free beating can be divided into.By the mode of production, between being divided into
It has a rest mashing and continuous beating.Free beating is based on cutting action, and the concentration of paper pulp is relatively low.The blade of the beater of the method
Relatively sharp, the tooth pitch of blade is closeer, and in mashing, fiber is easy to be cut off, and so that the paper manufactured paper with pulp out is will appear density small and swollen
It is loose, opaque, retractility is small, ink be easy attachment etc. characteristics.Glutinous shape formula methods of beating is to grind the principles such as routed with rupture.Used in it
Pulp density it is higher, and the blade of beater is more blunt, and blade tooth pitch is sparse, and when cut staple easy tos produce different in size
Phenomenon keeps the physical characteristic that the paper for manufacturing paper with pulp out possesses stronger, and papery is close, and paper surface smoothness is good, transparency compared with
It is high and the characteristics such as be not easy to scratch.
S202：Slurry sample is extracted, slurry sample is placed in storage container；
In the present embodiment, after extracting slurry sample, slurry sample is placed in a storage container, in order to subsequent detection
Flow acquires the detection data about slurry sample.The selection of storage container also needs the needs for meeting testing process.This reality
It is using image analysis to assist the uniformity of detection slurry sample to apply the method that example illustrates detection sheet uniformity, this is just
It is required to observe slurry sample outside storage container, therefore in the present embodiment, storage container is preferably transparent material.So
One, you can obtain the image information etc. about slurry sample outside storage container, judge for the detection of the subsequent uniformity.
S203：Storage container is rocked, so that the pulp fiber in storage container is uniformly distributed in storage container；
In the present embodiment, the poly- situation of wadding of pulp fiber is to influence dominating for the slurry sample uniformity in slurry sample
Factor, therefore the slurry that the present embodiment is acquired wads a quilt with cotton poly- image as the poly- image of wadding of pulp fiber in slurry sample, i.e. slurry is wadded a quilt with cotton
The aggregation situation of pulp fiber in poly- image reflection slurry sample.To avoid the pulp fiber heap of slurry sample in storage container
Product, causes slurry sample pulp fiber density unevenness everywhere, needs to rock storage container before acquisition slurry wads a quilt with cotton poly- image, with
So that the pulp fiber in storage container is uniformly distributed in storage container, that is, ensures slurry sample pulp fiber concentration phase everywhere
Deng.
It should be noted that the slurry sample equal uniformity that can not indicate the slurry sample of pulp fiber concentration everywhere
Well.Storage container is rocked, independent pulp fiber in slurry sample is only made to be separated from each other so that independent slurry in slurry sample
Material fiber is uniformly distributed, and ensureing slurry sample, pulp fiber concentration is equal everywhere.But length, the thickness equidimension of each pulp fiber
And the spatial orientation degree and mode of pulp fiber have differences, this is because the component proportion and beating of slurry sample
Caused by process, the difference of pulp fiber can be such that the poly- situation of the wadding of pulp fiber in different slurry samples has differences, and cause
The uniformity of different slurry samples has differences.The present embodiment illustrates the mode of detection sheet uniformity by detecting pulp-like
The poly- situation of the wadding of pulp fiber in product, to reflect the uniformity situation of slurry sample.When the uniformity of slurry sample is not met
When the manufacture of product paper requires, by adjusting the component proportion and beating process of slurry sample, to adjust improvement slurry sample
The uniformity.
Optionally, the poly- image of slurry wadding for being enough to characterize the slurry sample uniformity, and the present embodiment are collected for guarantee
The slurry acquired is wadded a quilt with cotton the poly- image of wadding of slurry sample pulp fiber that poly- image is reflected by storage container bottom, it is therefore desirable to
The dosage for the slurry sample extracted can at least be covered with the bottom of storage container, and the dosage of slurry sample is specifically as follows 100
Milliliter etc..Certainly, depending on the dosage of slurry sample is with specific reference to storage container bottom size, to ensure extracted slurry sample
Dosage can at least be covered with the bottom of storage container, do not limit herein.
Further, slurry sample generally goes through bleaching in its paper manufacturing process, causes the slurry in slurry sample
The components such as fiber present white, and the solvent portion in slurry sample be transparency liquid (such as water etc.), therefore pulp fiber it
Between interval present solvent portion color, i.e., it is transparent.But it presents and is reflected in figure between white pulp fiber and transparent solvent
As upper difference is not obvious, therefore after rocking storage container, need to place a cover board at the top of storage container, cover board with
The color of pulp fiber is different, so that the color of cover board is presented in the interval between white pulp fiber is presented so that slurry is wadded a quilt with cotton
The difference being spaced between the pulp fiber and pulp fiber that are reflected on poly- image is more obvious, the acquisition convenient for data and meter
It calculates.
Optionally, the color of cover board can be the dark system such as black, the cover board of dark color system and the pulp fiber that white is presented
Between color contrast it is the most apparent.
S204：The slurry sample in storage container is scanned using image collecting device, the slurry to acquire slurry sample is wadded a quilt with cotton
Poly- image；
In the present embodiment, it after extraction work and the pretreatment work of completing slurry sample, needs to acquire pulp-like
The poly- image of the corresponding slurry wadding of product.Specially using above-mentioned cover board as image background, storage container is scanned using image collecting device
Bottom, the poly- image of wadding to obtain the pulp fiber that storage container bottom is reflected, the slurry which is reflected
The poly- image of wadding of fiber is the poly- image of slurry wadding.The slurry of acquired slurry sample wads a quilt with cotton poly- image for follow-up slurry sample
Uniformity Analysis.
S205：The corresponding speckle index of the poly- image of slurry wadding is obtained, speckle index is used to describe the uniformity of slurry sample；
In the present embodiment, speckle index is introduced to describe the uniformity situation of slurry sample, the uniformity of slurry sample
It is inversely proportional with speckle index, i.e. speckle index is bigger, and the uniformity of slurry sample is better.
Obtaining the wad a quilt with cotton detailed process of the corresponding speckle index of poly- image of slurry is：A son slurry is obtained in slurry wads a quilt with cotton poly- image
The poly- image of material wadding.Due to not ensuring that adaptation is all for calculating the picture size of speckle index acquired in image collecting device
Storage container dimensions, therefore the sub- slurry that is acquired of image collecting device wads a quilt with cotton that be less than slurry wadding poly- for the size of poly- image
The size of image, in order to which selection one can most reflect pulp fiber in slurry sample to image collecting device in slurry wads a quilt with cotton poly- image
Wad a quilt with cotton poly- image of the sub- slurry for poly- situation of wadding a quilt with cotton carries out the calculating of speckle index.Wherein, the poly- image of sub- slurry wadding has both included that slurry wadding is poly-
It wads a quilt with cotton in image poly- all right part, while also including that slurry is wadded a quilt with cotton the poor part of poly- situation of wadding a quilt with cotton in poly- image, so that son slurry
Wad a quilt with cotton poly- image of material can represent slurry pulp fiber in the slurry sample that poly- image is reflected of wadding a quilt with cotton and wad a quilt with cotton poly- situation.
Optionally, the wad a quilt with cotton dimensions of poly- image of sub- slurry can be 10cm*10cm etc., according to image collecting device and
The requirement of speckle exponentiation algorithm determines that sub- slurry is wadded a quilt with cotton the dimensions of poly- image, does not limit herein.
After obtaining the poly- image of sub- slurry wadding, measurement obtains the defects of the poly- image of the sub- slurry wadding size of space, i.e. son slurry
The size of space in the poly- image of material wadding between different pulp fibers.It is calculated by interpolated value Shift Method between acquired defect
Every the corresponding speckle indicatrix of size, and speckle index is obtained by speckle indicatrix, to describe the equal of slurry sample
Evenness.
It should be noted that the numberical range of speckle index is 0 to 100.When speckle index is 0, that is, represent pulp-like
The uniformity of product is ideal optimum state, and close effect can be obtained by applying medium-sized color by frosting；And work as speckle
When index is 100, that is, the uniformity of slurry sample is represented as worst state, is similar to the black/white lattice surface of chessboard
Effect.
In the experimental example of the present invention, slurry as shown in Fig. 3 is wadded a quilt with cotton poly- image 300, and corresponding speckle index is
14.076, intertexture index is 52.1.Speckle index represents slurry and wads a quilt with cotton poly- uniformity state, and data are bigger, and to represent slurry wadding poly- brighter
Show, poly- uniformity of wadding a quilt with cotton it is poorer, intertexture index represents sheet uniformity situation, and data are bigger, and to represent uniformity better.Wherein, interweave
Index is the experimental data of uniformity detection gained to be carried out for molding product paper, and speckle index is to product paper pair
The paper pulp raw material answered carries out the experimental data of uniformity detection gained, and compared to intertexture index, speckle index can be more anti-in time
Present the uniformity situation of slurry sample.
In the experimental example of the present invention, slurry as Figure 4 shows is wadded a quilt with cotton poly- image 400, and corresponding speckle index is
15.037, intertexture index is 48.9.
In the experimental example of the present invention, slurry as Figure 5 shows is wadded a quilt with cotton poly- image 500, and corresponding speckle index is
17.794, intertexture index is 41.3.
In the experimental example of the present invention, slurry as illustrated in figure 6 is wadded a quilt with cotton poly- image 600, and corresponding speckle index is
19.214, intertexture index is 36.7.
In conclusion due to the slurry that the detection sample needed for detection sheet uniformity method provided by the present invention is paper
Sample, rather than molding paper.By the poly- image of slurry wadding reflected to slurry sample, it is poly- that calculating gets slurry wadding
The corresponding speckle index of image, is described with the uniformity to the slurry sample, can directly from speckle exponent pair also not at
Type is that the uniformity of the slurry sample of product paper is judged, can be detected and sentence to the uniformity of product paper in advance
It is disconnected, to which solution carries out asking for testing result lag caused by uniformity detection judgement now with technology for molding paper
Topic, and then improve the lag sex chromosome mosaicism of sheet uniformity testing result.
Referring to Fig. 7, Fig. 7 is the structural schematic diagram of one embodiment of system of present invention detection sheet uniformity.
In the present embodiment, detect sheet uniformity system 700 include processor 701, image collecting device 702 and
Storage container 703, processor 701 are connect with image collecting device 702, and storage container 703 for holding slurry sample, adopt by image
Acquisition means 702 are used to scan the slurry sample in storage container 703 placed on it, to acquire the poly- figure of slurry wadding of slurry sample
Slurry is simultaneously wadded a quilt with cotton poly- image transmitting to processor 701 by picture, and processor 701 obtains the corresponding speckle index of the poly- image of slurry wadding, uses
In the uniformity of description slurry sample.
Optionally, storage container 703 can be transparent glass material, and storage container 703 is specifically as follows basal diameter and is
The cylindric groove body of 180mm, as shown in Figure 8.
Optionally, image collecting device 702 can be scanner.The scanning resolution of image collecting device 702 is
Any one in 600ppi, 1200ppi and 2400ppi.The scanning resolution that image collecting device 702 has include but
It is not limited to described above, the wad a quilt with cotton rational scanning of resolution requirement selection of poly- image of the slurry that can be acquired according to it is differentiated
Rate, to ensure that slurry that it is acquired poly- image of wadding a quilt with cotton has enough clarity, to ensure the detection of the slurry sample uniformity
As a result accuracy.Wherein, the scanning resolution of image collecting device 702 is higher, then its slurry acquired is wadded a quilt with cotton poly- image
Clarity is higher.
Optionally, processor 701 is the electric terminal for having independent computing power, is specifically as follows PC, intelligence
Energy mobile phone etc. has CPU (Central Processing Unit, central processing unit 701) or MCU (Microcontroller
Unit, micro-control unit) etc. logical operations integrated circuit electric terminal.Processor 701 can be built with image collecting device 702
Vertical connection relation obtains the poly- image of slurry wadding that image collecting device 702 acquires and is transmitted to processor 701, processor 701
The poly- image that can wad a quilt with cotton to the slurry carries out calculating analysis to obtain the data for describing the slurry sample uniformity such as speckle index
Index.
Mode the above is only the implementation of the present invention is not intended to limit the scope of the invention, every to utilize this
Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content, it is relevant to be applied directly or indirectly in other
Technical field is included within the scope of the present invention.
Claims (10)
1. a kind of method of detection sheet uniformity, which is characterized in that the method includes：
A slurry sample is extracted, the slurry sample is placed in a storage container；
The slurry sample in the storage container is scanned using image collecting device, to acquire the slurry of the slurry sample
It wads a quilt with cotton poly- image；
The corresponding speckle index of the poly- image of the slurry wadding is obtained, the speckle index is for describing the uniform of the slurry sample
Degree.
2. according to the method described in claim 1, it is characterized in that, including before the step of one slurry sample of the extraction：
Beating processing and addition chemicals auxiliary agent are carried out to the slurry sample.
3. according to the method described in claim 1, poly- image is slurry in the slurry sample it is characterized in that, the slurry is wadded a quilt with cotton
The slurry sample is placed in after the step in a storage container and wraps by the poly- image of wadding of fiber, one slurry sample of the extraction
It includes：
The storage container is rocked, so that the pulp fiber in the storage container uniformly divides in the storage container
Cloth；Wherein, the slurry sample is at least covered with the storage container bottom.
4. according to the method described in claim 3, it is characterized in that, the slurry sample dosage is 100 milliliters.
5. according to the method described in claim 3, it is characterized in that, the storage container is transparent material, it is described rock it is described
Include after the step of storage container：Cover board, the face of the cover board and the pulp fiber are placed at the top of the storage container
Color is different；
It is described to scan the slurry sample in the storage container using image collecting device, to acquire the slurry sample
The step of slurry wadding poly- image, specifically includes：
Described image harvester obtains the slurry that the storage container bottom is reflected using the cover board as image background
The poly- image of wadding of fiber is the poly- image of slurry wadding.
6. according to the method described in claim 1, it is characterized in that, the corresponding speckle of the poly- image of the slurry wadding that obtains refers to
Several steps specifically include：
A poly- image of sub- slurry wadding is obtained in the slurry wads a quilt with cotton poly- image；
Obtain the defects of the poly- image of the sub- slurry wadding size of space；Wherein, the defect size of space is the sub- slurry
The size of space wadded a quilt with cotton in poly- image between different pulp fibers；
The acquired corresponding speckle indicatrix of the defect size of space is calculated by interpolated value Shift Method, and by described
Speckle indicatrix obtains the speckle index, to describe the uniformity of the slurry sample；Wherein, the slurry sample
The uniformity is inversely proportional with the speckle index.
7. according to the method described in claim 6, the dimensions of poly- image is 10cm* it is characterized in that, the sub- slurry is wadded a quilt with cotton
10cm, and the sub- slurry wads a quilt with cotton poly- image area less than the poly- image of slurry wadding.
8. it is a kind of detection sheet uniformity system, which is characterized in that the system comprises processor, image collecting device and
Storage container, the processor are connect with described image harvester, and the storage container is for holding slurry sample, the figure
As harvester is used to scan the slurry sample in the storage container placed on it, to acquire the slurry sample
The slurry is simultaneously wadded a quilt with cotton poly- image transmitting to the processor by the poly- image of slurry wadding, and the processor, which obtains the slurry and wads a quilt with cotton to gather, schemes
As corresponding speckle index, the uniformity for describing the slurry sample.
9. system according to claim 8, which is characterized in that the storage container is transparent glass material, the storage
Vessel are the cylindric groove body that basal diameter is 180mm.
10. system according to claim 8, which is characterized in that described image harvester is scanner, and described image is adopted
The scanning resolution of acquisition means is any one in 600ppi, 1200ppi and 2400ppi.
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| CN114217053A (en) * | 2021-11-22 | 2022-03-22 | 复旦大学 | Elasticity detection method suitable for ancient book restoration paper |
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