CN104685347A - Thread inspection method, thread inspection device, thread production method, thread package and thread module - Google Patents
Thread inspection method, thread inspection device, thread production method, thread package and thread module Download PDFInfo
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- CN104685347A CN104685347A CN201380051780.6A CN201380051780A CN104685347A CN 104685347 A CN104685347 A CN 104685347A CN 201380051780 A CN201380051780 A CN 201380051780A CN 104685347 A CN104685347 A CN 104685347A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
- D06H3/00—Inspecting textile materials
- D06H3/08—Inspecting textile materials by photo-electric or television means
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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
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/952—Inspecting the exterior surface of cylindrical bodies or wires
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- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Treatment Of Fiber Materials (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
Provided is a thread inspection method, wherein in a thread production process for producing a thread traveling continuously in a longitudinal direction, an image of the traveling thread is captured, and the total length of the traveling thread is inspected at high speed from obtained image data to thereby obtain information relating to a thread defect without falsely recognizing a case where the thread is merely shaking or a case where the thread is merely traveling obliquely as a thread defect. This thread inspection method is characterized in that an image of a traveling thread is captured by an image capturing means, and image data obtained by the image capturing means is subjected to data processing by a data processing means, the data processing comprising: (a) a step for calculating a plurality of thread widths in a predetermined section in a traveling direction from the image data relating to the traveling thread; (b) a step for calculating a variation in thread width from the plurality of thread widths; and (c) a step for comparing the variation in thread width with a first threshold value.
Description
Technical field
To the present invention relates in the line procedures processed manufacturing silk thread for the silk thread in being continuously traveling along long dimensional directions by carrying out the data using optical method to obtain processing the inspection method the silk thread of the state of the presence or absence or defect that are held in the defect produced in silk thread (such as, joint, centre attenuate).
Background technology
In the past, in various field and purposes, utilize, apply flexibly with fiber or fibre, hollow-fibre membrane the silk thread being representative.
In the past, in the production of these silk threads, requirement can be produced in a large number, at high speed or cost reduces.On the other hand, not strong to the requirement of quality., in recent years, along with the development of science and technology, also with silk thread be member of formation final products multifunction, utilize the expansion in the field of these silk threads to combine, in order to improve the quality of final products, silk thread also being become and requires high-quality.That is, now, except a large amount of, high-speed production, low-cost production etc. such except the problem since the past, the high-qualityization of silk thread self also becomes problem.
At this, as being used to H.D product and the silk thread of being attracted attention, can enumerate: be used to the carbon fiber of the structure component of automobile or aircraft, support information communicating agent can optical fiber, be used to the modified cross-section fibre etc. of high function dress material in addition.Similarly, as being required the silk thread that high-quality manages, the hollow-fibre membrane of the pre-treatment purposes for wastewater treatment, water treatment, seawater desalination can also be enumerated.These are all the silk threads that the shortcoming (defect of shape bad (damage by pressure, flat, joint, centre attenuate, heave, concavo-convex etc.), thickness bad (fine rule, thick line etc.), a part, rupture, be mixed into foreign matter, fluffing, damage, unedged etc.) produced in silk thread can directly impact the quality of final products.Therefore, the quality of the silk thread that necessary strict control is such.
More specifically, such as hollow-fibre membrane is that raw material manufactures usually with macromolecule, but, the situation having film thinning or thickening on the contrary in the process manufactured.In addition, the situation at film surface attachment foreign matter is also had.When these shortcomings produce, there is the possibility strainability of hollow-fibre membrane being caused to bad influence.Therefore, in order to not make the hollow-fibre membrane creating shortcoming flow out to market, and need to check hollow-fibre membrane surface.
, usually, about hollow-fibre membrane, after by metal mouth raw material being formed as hollow shape, implement various process, the mode of carrying out finally by utilizing up-coiler reeling is produced, and therefore, is always continuously traveling aborning.
In addition, in order to realize a large amount of, high-speed production, low-cost production, usually manufacture many hollow-fibre membranes side by side simultaneously.
In such manufacture, the H.D silk thread taking simultaneously hollow-fibre membrane as representative to many in advancing side by side check and according to each silk thread detect defect to the information holding the defect of each silk thread silk thread self and the silk thread package after manufactured silk thread is reeled, enroll silk thread silk thread module qualitative control in be important.
Now, in order to ensure the quality of silk thread completely, the total length of silk thread is importantly checked when not being slower than the gait of march of silk thread.
Always, as often monitoring that the state of silk thread detects the method for the defect produced in silk thread, propose the inspection method (with reference to patent documentation 1) of following middle silk thread of advancing: lighting unit and shooting unit are arranged to the running face of silk thread, take with the reflected light of shooting unit to the running face at silk thread produced by lighting unit, 1. according to the view data obtained, the defect being included in middle silk thread of advancing is extracted as extraction unit data, 2. extract according to the profile portion data of extraction unit data to extraction unit obtained, 3. be used as remaining portion data from the profile portion data removing line segment parallel with the direct of travel of silk thread obtained, 4. by the remaining portion obtained data and the threshold value preset are compared the presence or absence judging defect.In addition, propose the inspection method (patent documentation 2) of following silk thread: to by with the shooting unit that the direction vertical with the direct of travel of silk thread is configured with the consistent mode of shooting axle, light shine silk thread surface illumination unit and take the image procossing that view data that unit obtains implements to specify, the boundary rectangle image of view data and view data are compared the presence or absence judging defect.
; in these methods; in the external factor such as vibration of the equipment of resulting from, normal silk thread is only that this external normal silk thread of situation that line rocks occurs is only that the situation of diagonal is inferior; although these are normal silk threads, are mistakenly identified as line width local sometimes and become " centre attenuates " defect that large " joint " defect or line width locally diminish.Such as, when to inspection method described in several view data application patent documentations 2 shown in Fig. 5, about silk thread YT
6, silk thread is only diagonal sometimes, but boundary rectangle width becomes large and is judged as defect.In addition, about YT
7, be only line occurs rock sometimes, but boundary rectangle width becomes large and is judged as defect.
In addition, by calculating line width according to view data according to every 1 pixel of direct of travel for whole silk thread, thus can differentiate that normal silk thread generation line rocks or diagonal or " joint " defect or " centre attenuates " defect, but, have data processing time to spend long and worry that is that be delayed in reflection check result, the cost increase of the high performance of data processing becomes problem.
Prior art document
Patent documentation
Patent documentation 1: Japanese Laid-Open 2012 – No. 092477 publication;
Patent documentation 2: No. 2012/039298th, International Publication.
Summary of the invention
The problem that invention will solve
The object of the present invention is to provide a kind of inspection method of silk thread, the inspection method of described silk thread is in the line procedures processed manufacturing the silk thread be continuously traveling along long dimensional directions, silk thread in advancing is taken, the total length of the silk thread in advancing is checked at high speed according to the view data obtained, when by silk thread be not only occur the line situation of rocking or silk thread be only the situation of diagonal be mistakenly identified as the defect of silk thread, obtain the information of the defect of silk thread, thus, the qualitative control of silk thread, silk thread package and silk thread module is carried out.
For solving the scheme of problem
To achieve these goals, the present invention adopts following method.
Namely, the present invention is, a kind of inspection method of silk thread, utilizes shooting unit take the silk thread in advancing and utilize data processing unit to carry out data processing to the view data obtained by described shooting unit, the feature of described method is, described data processing comprises:
(a) according to described in the advance view data of middle silk thread calculate the process of the multiple line widths in the interval of the regulation of direct of travel;
B () calculates the process of the deviation of line width according to described multiple line width; And
C process that the deviation of described line width compares with first threshold by ().
Multiple line widths that the deviation of described line width can measure according to the measuring point in the interval of described regulation specified by predetermined Segmentation Number calculate.
In addition, in the inspection method of silk thread of the present invention, be preferably, described data processing, except described (a) and (b) and (c), also comprises:
(d) calculate middle silk thread of advancing described in the interval of the regulation of described direct of travel boundary rectangle width and/or in connect the process of rectangle width;
E () calculates the process of the typical value of line width according to described multiple line width; And
(f) by the typical value of described line width and described boundary rectangle width and/or described in connect the process that rectangle width compares.
In addition, in the inspection method of silk thread of the present invention, be preferably, described data processing, except described (a) and (b), (c), (d), (e) and (f), also comprises:
G process that the difference of the typical value of described line width and described boundary rectangle width compares with Second Threshold by ()
And/or
(h) by the typical value of described line width and described in connect rectangle width the process that compares with the 3rd threshold value of difference.
In addition, in the inspection method of silk thread of the present invention, can make the typical value of described line width for described in advance the mean value of line width of view data of middle silk thread or intermediate value or maximal value or minimum value or the line width of precedence that line width is specified in advance by ascending sort.
In addition, in the inspection method of silk thread of the present invention, be preferably, data processing, except described (a) and (b) and (c), also comprises:
(d) calculate the described silk thread in the interval of the regulation of direct of travel boundary rectangle width and/or in connect the process of rectangle width; And
By the line width designed in advance and described boundary rectangle width and/or described in connect the process that rectangle width compares.
In addition, in the inspection method of silk thread of the present invention, be preferably, described data processing except described (a) and (b), (c), (d) and (i) except, also comprise:
J process that the difference of the described line width that designs in advance and described boundary rectangle width compares with the 4th threshold value by ()
And/or
(k) by the described line width that designs in advance and described in connect rectangle width the process that compares with the 5th threshold value of difference.
In addition, in the inspection method of silk thread of the present invention, be preferably, described data processing, except described (a) and (b) and (c), also comprises:
E () calculates the process of the typical value of line width according to described multiple line width; And
L process that the difference of the typical value of the described line width that designs in advance and described line width compares with the 6th threshold value by ().
In addition, the testing fixture of silk thread of the present invention possesses: shooting unit, takes the silk thread in advancing; And data processing unit, data processing is carried out to the view data utilizing described shooting unit to obtain, and, described testing fixture can use the inspection method of described silk thread any one check the silk thread in advancing.
In addition, the manufacture method of silk thread of the present invention has: check operation, and wherein, any one using the inspection method of described silk thread checks the silk thread in advancing.And then, preferably comprise following operating process: determine based on the check result obtained in above-mentioned inspection operation the exception that produces in manufacturing process and change the condition of manufacturing process.
Invention effect
According to the present invention, can in the line procedures processed manufacturing the silk thread product be continuously traveling along long dimensional directions, silk thread in advancing is taken, the total length of the silk thread in advancing according to the view data inspection obtained identifies the defect of silk thread, in addition, normal silk thread can be suppressed to be identified as but because the line in advancing rocks or diagonal and be mistakenly identified as the situation of defect.In addition, by obtaining the information of the defect of each silk thread, thus the operation such as the variation for the treatment of conditions can be found in advance abnormal and improve yield rate, in addition, the qualitative control of silk thread, silk thread package and silk thread module can be carried out.
In addition, according to the inspection method of silk thread of the present invention, especially, due to be not according to view data all fronts of direct of travel calculate line width, but only carry out sampling to calculate line width to multiple, so the inspection of silk thread can be carried out at short notice in the interval of regulation.Therefore, even if silk thread advance at a high speed such as exceed the speed of 50m per minute under, even if when making the personal computer of data processing equipment such as universal product that the device used in the data processing unit that processes of view data of shooting is cheapness, also can check the total length of multi-filament line when not being slower than gait of march simultaneously, thus online being held in the presence or absence of defect or the state of defect in each silk thread.
And then, the inspection method of the silk thread of the application of the invention, thus each qualitative control of the silk thread can suitably and promptly implemented to utilize the line procedures processed of the silk thread simultaneously manufacturing multi-filament line and manufacture.
Accompanying drawing explanation
Fig. 1 is the summary lateral view of an example of the testing fixture of the enforcement of the inspection method illustrated for silk thread of the present invention.
Fig. 2 is the approximate vertical view of an example of the testing fixture of the enforcement of the inspection method illustrated for silk thread of the present invention.
Fig. 3 be the enforcement of inspection method for silk thread of the present invention after view data obtains to the skeleton diagram of the data processing unit that view data processes.
Fig. 4 be exemplified with shooting obtain advance in the schematic diagram (being all normal silk thread) of view data of multi-filament line.
Fig. 5 be exemplified with shooting obtain advance in the schematic diagram (comprise and be considered to abnormal silk thread) of another view data of multi-filament line.
Fig. 6 illustrates that the view data for Fig. 5 calculates the figure of the process of multiple line widths of each silk thread.
Fig. 7 illustrates that the view data for Fig. 5 calculates the figure of the process of the boundary rectangle width of each silk thread.
Fig. 8 illustrates that the view data for Fig. 5 calculates the figure of the process connecing rectangle width in each silk thread.
Embodiment
In the inspection method of silk thread of the present invention, as the silk thread becoming check object, as long as hollow-fibre membrane, dress material fiber, carbon fiber, optical fiber, steel wire, catheter tube for medical treatment etc. have in fact the silk thread product of the structure of cylindric or tubulose, then can using any silk thread all as check object.In addition, the silk thread that the inspection method of silk thread of the present invention is applied both can be the such ultimate fibre of hollow-fibre membrane, also can be the such many ultimate fibre groups of carbon fiber.
As the hollow-fibre membrane that the inspection method of silk thread of the present invention is applied, such as, the hollow-fibre membrane that can to enumerate with organic macromolecule and aluminium oxide, zirconia, titania, the silit etc. such as polycarbonate, polyolefin, polyamide-based, polyimide, cellulose family, polysulfones, polyethersulfone, polymethacrylic acid, polyacrylonitrile, polyvinylidene fluoride, polyethers ketone pottery etc. be material.
In addition, inspection method of the present invention also can be applied to the inspection of any one of adopted hollow-fibre membrane as ultra filtration membrane, microfiltration membranes, gas separation membrane, infiltrating and vaporizing membrane, dialysis membrane etc.These hollow fiber membrane modules are used to water treatment, artificial kidney.
For the testing fixture of the enforcement of the inspection method of silk thread of the present invention, there is the shooting unit taken the silk thread in advancing and the data processing unit view data utilizing this shooting unit to obtain being carried out to data processing.
Shooting unit refers to that point-blank or 2 arrange and carry out capturing element (pixel) such as CCD, CMOS of light-receiving to light and the bright dark data each pixel light received are configured to the sensor of image with tieing up.
In addition, take unit and the total length of silk thread in advancing can obtain view data according to each interval L of the regulation described later.That is, by captured view data is engaged, thus the view data of the total length of silk thread in obtaining when not producing repetition or lacking advancing.Therefore, the timing of captured image data suitably can regulate based on the length of the interval L of the gait of march of silk thread and regulation.
When multi-filament line is advanced side by side, the Width length of the inspection area needed due to the radical according to the silk thread in advancing, so in order to take it with high resolving power, the more preferably line sensor video camera of line spread light receiving element.The pixel count of line sensor video camera is preferably more than 2000 pixels.For meeting above-mentioned line sensor video camera, Japanese ELECTRO SENSORY DEVICES(share can be used), manufacturer's product such as system machine (share), Basler company, DALSA company in bamboo.
When using line sensor video camera as shooting unit, preferably, by shooting image every 1 frame obtain line number be set as advancing in the interval of regulation of silk thread.In addition, when being used for taking unit by the area sensor video camera of planar alignment light receiving element, the size of image 1 frame decides according to the type used.Therefore, when the interval of the regulation of the silk thread in taking the size of image and being unsuitable for advancing, before data processing of the present invention, also to shooting Image Segmentation Using or the combination with the shooting image of front and back can be carried out.
As lighting unit of the present invention, as long as can throw light on equably on direction parallel with the running face of silk thread and at a right angle relative to the direct of travel of silk thread to silk thread.When multi-filament line is advanced side by side, as long as also can throw light on equably to each silk thread in the direction of the width.The light quantity difference of the illumination on Width is preferably set within 20%.In addition, as long as the illumination of lighting unit is the illumination of the sufficient reflection light quantity of the defect can guaranteed from silk thread and silk thread, then the intensity of illumination light, wavelength are not defined.
In the present invention, " running face of silk thread " as described below.That is, when 1 rhizoid line is advanced contiguously with 2 the silk thread conveying rollers be arranged in parallel respectively, silk thread will be comprised and the face parallel with the axle of silk thread conveying roller is set to the running face of silk thread.In addition, the silk thread more than 2 is parallel when advancing, and in the same manner as the situation being also 1 with silk thread, about the running face of silk thread, forms the running face comprising the silk thread of these multi-filament lines, advances to the line procedures processed of silk thread.
In the present invention, lighting unit both can be arranged on and the position taking unit same side relative to the running face of silk thread, also can be arranged on the position of not homonymy.When being arranged on " with the position of above-mentioned shooting unit same side ", above-mentioned shooting unit to throw light on by above-mentioned lighting unit silk thread reflection or scattering after light carry out light-receiving.In this case, wire section is taken as highlights, background parts is taken as dark portion.In addition, when being arranged on " with the position of above-mentioned shooting unit not homonymy ", shooting unit carries out light-receiving to the light in the gap of transmission silk thread, in this case, wire section is taken as dark portion, background parts is taken as highlights, therefore, as long as consider that this point carries out image procossing.
In addition, as lighting unit, the fluorescent light of the high frequency points lamp-based that illuminated portion can be used to be wire or the illumination of LED line etc.In addition, also can use with the lighting unit being become by multiple optic fiber configureing the light of the photoconduction of wire to light sources such as halogen tungsten lamp, metal halide lamp, LED to guide to throw light on, the lighting unit thrown light on to light at the end face of columned rod lens or the lighting unit etc. being provided with cylindrical lens at front surface.In the viewpoint of cost or maintenance, the fluorescent light of preferred high frequency points lamp-based., when needing gait of march such as to detect with the speed exceeding 50m per minute soon, preferably, the lighting unit of the high brightness such as LED, metal halide lamp is used.
< the first embodiment > of the present invention
First embodiment of the present invention is described.
In the inspection method of silk thread of the present invention, utilize shooting unit to take the silk thread in advancing, utilize data processing unit to carry out data processing to the view data obtained.This data processing comprises: (a) according to the view data of the silk thread in advancing calculate multiple line widths in the interval of the regulation of direct of travel (following, be sometimes referred to as " line width data group ".) process (following for process A), (b) calculate according to the line width data group obtained the process (below as process C) that the deviation of this line width compares with first threshold by the process (below as process B) of the deviation of line width and (c).
In the view data utilizing shooting unit to obtain, shooting has the background parts of wire section and silk thread periphery, first, extracts the wire section in the interval of the regulation of direct of travel.Such as, compare by the brightness value of each pixel included by image with certain fixing threshold value and apply binary conversion treatment, thus wire section can be separated with the background parts around silk thread.In addition, when view data comprises picture noise, preferably, before the extraction process stated on the implementation, implement the filtering process such as equalization filtering, gaussian filtering, medium filtering and reduce picture noise.In process A, the wire section of the view data obtained according to doing like this carrys out the line width of each silk thread in the interval of the regulation of repetitive measurement direct of travel, and using its result as line width data group.In the measurement of line width, preferably, specify measuring point by carrying out segmentation according to the interval of predetermined Segmentation Number to regulation, and the line width at these multiple measuring point places is calculated, thus, form the line width data group of each silk thread.
In process B, calculate the deviation of line width according to each silk thread according to the line width data group calculated in said process A.About representing the index of deviation, using standard deviation, variance, whichever will do for scope (difference of maxima and minima) etc. from minimum value to maximal value.
In process C, the deviation of the line width data group calculated in said process B is compared with the first threshold preset.Index according to the deviation representing line width suitably sets first threshold.
If the first threshold that the deviation ratio of the line width data group of certain silk thread presets is large, be then judged as defectiveness in this silk thread.
At this, " line width " as described below.That is, preferably, be set to the width in the direction vertical relative to direct of travel for benchmark with the direct of travel of the silk thread in the view data obtained.In addition, also the width in the arbitrary direction predetermined relative to direct of travel can be set to line width.
In addition, " interval of regulation " is equivalent to the length of the direct of travel of the silk thread checked in 1 secondary data process, and, consider to occur that the situation (size or frequency etc.) of defect suitably sets.Due in the present invention using the deviation of the line width before and after defect as index, so, need the interval making this regulation to be larger than the coverage of defect, particularly preferably, be set as about 1 ~ 10 times of the coverage of defect.
Below, with reference to accompanying drawing, while be described the inspection method of silk thread of the present invention.
Fig. 1 is obtaining view data and its testing fixture processed and view data being obtained to the summary lateral view for the treatment of apparatus ID of the enforcement of inspection method for silk thread of the present invention.In addition, Fig. 2 is the approximate vertical view that the view data of Fig. 1 obtains treating apparatus ID.
In fig. 1 and 2, view data obtains treating apparatus ID and has parallel to each other and across 2 silk thread conveying rollers R1, R2 of positioned at intervals.Multi-filament line YT
1– YT
nthere is interval B
2– B
nside by side and contact with silk thread conveying roller R1, R2, advance to the direction shown in arrow YCD in ground.In addition, by the multi-filament line YT in advancing
1– YT
nthe running face YCP(dotted line forming silk thread illustrates).Each silk thread is positioned on the running face YCP of this silk thread.
Across the running face YCP of silk thread, lighting unit 2 and shooting unit 1 are set at the first side P1.Shooting unit 1 is arranged on being thrown light on silk thread and carry out the position of light-receiving at the scattered reflection light that the running face of silk thread produces by lighting unit 2.
Be imported in data processing unit 3 by shooting unit 1 view data of taking, judged to advance the presence or absence of defect of middle silk thread or state by data processing unit 3.
Fig. 3 be the enforcement of inspection method for silk thread of the present invention after view data obtains to the skeleton diagram of the data processing unit that view data processes.
In figure 3, in data processing unit 3, for the view data obtained, in process A, calculate the line width data group in the interval of the regulation of direct of travel according to each silk thread according to the view data of silk thread in respectively advancing.Then, in process B, the deviation of line width is calculated according to each silk thread according to the line width data group calculated.Then, in process C, by the deviation of the line width calculated is compared with the first threshold preset the quality judging silk thread.If the deviation ratio first threshold of the line width in certain silk thread is large, be then judged as the defect had in this silk thread in quality.In addition, zero defect in silk thread and be only the line situation of rocking or silk thread occur is only diagonal, because the deviation of line width is little, so can prevent misjudged breaking as there being the defect in quality.
In addition, Fig. 4 is the schematic diagram exemplified with the view data utilizing shooting unit 1 to obtain.In the diagram, the multi-filament line (YT advanced along the direction of arrow YCD
1, YT
2... YT
n) and adjacent silk thread between and the background parts B at two ends
1, B
2... B
n, B
n+1binarized.Silk thread (the YT of Fig. 4
1, YT
2... YT
n) show the situation that each silk thread is normal silk thread.In manufacturing process, need to check that each silk thread is normal silk thread at high speed.
Fig. 5 is the multi-filament line (YT exemplified with advancing along the direction of arrow YCD
1, YT
2... YT
n) comprise and be in the various schematic diagram being considered to the view data of the silk thread of abnormal such situation.
In Figure 5, illustrate the direct of travel of silk thread with arrow YCD, for interval L(such as 60mm/ image 1 frame of each silk thread (such as design lines width 1.5mm) by regulation) calculate multiple line widths (process A) of each silk thread.At this, as shown in Figure 6, with predetermined Segmentation Number (in the case of fig. 6 for 5) equally spaced L between cut section, and, the line width of 5 each silk threads is calculated (about the two ends of interval L at measuring point shown in broken lines, consider the repetition with the image of front and back, either party calculating with beginning or end).According to the line width that this calculates, calculate the deviation (at this, adopting standard deviation) (process B) of 5 calculated values of line width further for each silk thread.The deviation of this line width is compared (process C) with the first threshold preset (such as 15 μm).If the deviation ratio first threshold of the line width calculated is large, be then judged as that quality aspect has some abnormal.
In addition, at silk thread YT as shown in Figure 6
7such silk thread is only line occurs when rocking or at such as silk thread YT
6when such silk thread is only diagonal, the deviation ratio first threshold of line width is little and be not judged as the defect in quality.On the other hand, at silk thread YT as shown in Figure 6
4such silk thread has " joint " or as silk thread YT
5when such silk thread has " centre attenuates ", the deviation ratio first threshold of line width is large and be judged as the defect in quality.
At this, by interval L60mm(namely, the length of the silk thread checked in 1 secondary data process) in the calculation times of line width of silk thread be set to 5 times, but the performance that it is possible to the size of the defect in view of imagination, the gait of march of silk thread, data processing speed and data processing equipment suitably sets.
< the second embodiment > of the present invention
In the second embodiment of inspection method of the present invention, except checking with presence or absence of the silk thread defect based on above-mentioned the first embodiment of the present invention, the situation of silk thread defect can also be checked.In this second embodiment, except above-mentioned data processing, data processing also comprises: to the boundary rectangle width of the above-mentioned middle silk thread of advancing in the interval of the regulation of the direct of travel of middle silk thread of advancing and/or in connect the process (following is process D) that rectangle width calculates and/or the typical value calculating line width according to line width data group process (following is process E) and by the typical value of line width and described boundary rectangle width and/or in connect the process (being process F below) that rectangle width compares.
In process D, describe the silk thread (YT with view data with the direct of travel YCD of silk thread for benchmark
1, YT
2... YT
n) external 2 imaginary parallel lines, the interval of these imaginary parallel lines is calculated as boundary rectangle width.Similarly, the silk thread (YT with view data is described
1, YT
2... YT
n) in 2 imaginary parallel lines connecing, the interval of these imaginary parallel lines is connect rectangle width to calculate as interior.In addition, the width in the arbitrary direction predetermined also can be adopted in the same manner as above-mentioned " line width ".
In process E, calculate the typical value of line width according to the line width data group of each silk thread obtained from view data.
In process F, the typical value of carrying out line width and boundary rectangle width compare and/or the typical value of line width connects comparing of rectangle width with interior.
Then, the difference of the above-mentioned boundary rectangle width of middle silk thread of advancing and the typical value of above-mentioned line width can be compared (process G) with the Second Threshold preset and/or the difference connecing the typical value of rectangle width and above-mentioned line width in above-mentioned middle silk thread of advancing can be compared (process H) with the 3rd threshold value preset.
At this, about the typical value of line width, the line width etc. of precedence that at random can be set as the mean value of line width data group, intermediate value or minimum value or maximal value or line width data group is specified in advance by ascending sort.
If the difference of the typical value of boundary rectangle width and line width is larger than Second Threshold, be then such as judged as the defect having " joint " such in this silk thread.In addition, if in connect the difference of the typical value of rectangle width and line width larger than the 3rd threshold value, then be such as judged as the defect having " centre attenuates " such in this silk thread.
For the view data of the silk thread shown in Fig. 5, in the same manner as the first embodiment, calculate multiple line widths of each silk thread by interval L, calculate the typical value of line width according to the value of the multiple line widths calculated.Such as, such as, when being representatively worth by mean value, as shown in Figure 6, for each silk thread, calculate the mean value (process E) of line width according to the value of the line width calculating 5 times between interval L.
In addition, for the view data shown in Fig. 5, about the boundary rectangle width of each silk thread, as shown in Figure 7, by each silk thread (YT with the view data in interval L
1, YT
2... YT
n) partial circumscription and the interval of 2 imaginary parallel lines (illustrating with the dotted line of profile) that the direct of travel YCD of silk thread is parallel be set to boundary rectangle width (process D).
Similarly, for the view data shown in Fig. 5, connect rectangle width about in each silk thread, as shown in Figure 8, by each silk thread (YT with the view data in interval L
1, YT
2... YT
n) connect in part and the interval of imaginary parallel lines (illustrating with dotted line) that the direct of travel YCD of silk thread is parallel be set in connect rectangle width (process D).
The typical value (in this case mean value) of the line width of each silk thread calculated doing like this and boundary rectangle width and/or in connect rectangle width and compare (process F).If such as the silk thread YT of Fig. 7
4the difference of the shown typical value (in this case mean value) of boundary rectangle width and line width is like that larger than Second Threshold (such as 150 μm), then can be judged as having such as line width local to become large " joint " defect in this silk thread.In addition, if such as the silk thread YT of Fig. 8
5shown in like that the typical value (in this case mean value) of line width and the interior difference connecing rectangle width larger than the 3rd threshold value (such as 150 μm), then the defect of " centre attenuates " that can be judged as having such as line width locally to diminish in this silk thread.
< the 3rd embodiment > of the present invention
In the 3rd embodiment of the present invention, except above-mentioned the first embodiment of the present invention, data processing also comprises: to the boundary rectangle width of the above-mentioned middle silk thread of advancing in the interval of the regulation of the direct of travel of middle silk thread of advancing and/or in connect process (process D) that rectangle width calculates and by the line width designed in advance and above-mentioned boundary rectangle width and/or above-mentioned in connect the process (process I) that rectangle width compares.
As mentioned above, in process D, to being benchmark with the direct of travel YCD of the silk thread in the view data obtained and the external 2 imaginary parallel lines of the wire section of view data are described, the width of this imaginary line is calculated as boundary rectangle width.In addition, similarly, describe the 2 imaginary parallel lines connect in the wire section with view data, the width of this imaginary line is connect rectangle width to calculate as interior.
In process I, the line width designed in advance and boundary rectangle width and/or in connect comparing of rectangle width.
Then, the difference of the line width designed in advance and above-mentioned boundary rectangle width is compared with the 4th threshold value (following is process J) and/or by the line width designed in advance and above-mentioned in connect rectangle width difference compare with the 5th threshold value (being process K below).
If the difference of the line width designed in advance and boundary rectangle width is larger than the 4th threshold value (such as 150 μm), be then judged as the defect such as having " joint " such in this silk thread.In addition, if the line width designed in advance and the interior difference connecing rectangle width larger than the 5th threshold value (such as 150 μm), be then judged as the defect such as having " centre attenuates " such in this silk thread.
In any one above-mentioned embodiment, and then, by adding the process (the being process L below) difference of the typical value (in this case mean value) of the line width designed in advance and line width compared with the 6th threshold value, thus can confirm whether silk thread manufactures with designed line width.If the difference of the typical value of the line width designed in advance and line width is less than the 6th threshold value (such as 50 μm), then can be judged as that this silk thread is manufactured with designed line width.
In addition, include in the manufacture method of the silk thread of the testing fixture of the inspection method of enrolling silk thread of the present invention in inspection operation, also can comprise following operating process: according to checking in operation the number of the defect detected, exception that manufacturing process is determined in position and change the condition of production process.
In the manufacturing process of silk thread, when the roller that silk thread is advanced, to the surface damage of the guide roller that the advanced positions of silk thread adjusts and silk thread contacts with injury region time, in the trend that this silk thread defectiveness increases.Therefore, when the quantity of the defect using the inspection method of silk thread of the present invention to detect being counted as Temporal changes by each silk thread in advancing time per unit such as every 1 hour, in the Temporal changes of defects count, also there is distinctive increase trend.The Temporal changes monitoring defect number in operation is being checked according to each position of silk thread, such as, when the defect number of time per unit exceedes the threshold value of regulation, to give notice in manufacturing process abnormal alarm, thus operator can check the manufacturing process of silk thread and repair exception.Thereby, it is possible to remove the producing cause of defect in advance, for the working time of the manufacturing process of silk thread, zero defect or the few silk thread of defect can be manufactured more compared with before implementing.Therefore, preferably, comprise in the manufacture method of the silk thread of the inspection method of silk thread of the present invention in inspection operation, comprise with the number of defect for benchmark determines the exception that occurs in manufacturing process and change the operating process of the condition of manufacturing process.
About using the silk thread package or silk thread module that obtain with the silk thread manufactured by such method, utilize silk thread inspection method of the present invention, can hold in package in advance or the positional information of the number of the defect included by silk thread in silk thread module or the defect relative to total length.Therefore, such as, silk thread package is unreeled when using in operation below, only can use the silk thread that flawless quality is good.Like this, possibly can prevent from always resulting from defect and the problem of operation after producing, and, compared with before the inspection method using silk thread of the present invention, yield rate can be made to improve.
In addition, so-called " silk thread package " refers to that the silk thread after by line processed draws the state together in the present invention.Such as the silk thread package after 1 or multi-filament line are wound into bobbin or spool or to silk thread package silk thread being folded or is cut to the silk thread after regular length and tie up, but, be not limited thereto mode.
In addition, " silk thread module " refers to the product enrolling above-mentioned silk thread package.Such as, when silk thread is hollow-fibre membrane, the dialyzer for hemodialysis, the filter cylinder etc. for water purification can be enumerated.Or, when silk thread is optical fiber, can enumerate for the optical cable of information communication, for comprising the endoscope of the various uses of medical application, but, be not limited thereto mode.
Embodiment
Below, based on embodiment, the present invention is described particularly.
The following view data based on Fig. 1 or Fig. 2 obtain treating apparatus ID illustrate use in an embodiment advance in the structure of testing fixture of silk thread.
Lighting unit: LED strip type illumination (exporting 100W, length 200mm, Xing electric corporation LS II200)
Shooting unit: line sensor video camera (4096 pixels, Basler Inc. Spl4096 – 20km)
The gait of march of silk thread: 10m/ minute
Utilize above-mentioned structure, hollow-fibre membrane (design lines width 1.5mm) 5 silk threads of advancing with the speed of 10m/ minute side by side in the same face are taken, change the data processing content of view data obtained and to advance the inspection of middle silk thread.Data processing unit adopts following structure, specification as used herein.
Arithmetic unit for data processing unit: personal computer 1
CPU:Intel(registered trademark) Core i7 – 950
Storer: 6GB
OS:Windows(registered trademark) 7 professional versions
Image procossing library software: HALCON(Ver.9.0, MVTec Inc.)
The size of each of view data for testing: 4096 × 3000 pixels.
[embodiment 1]
Silk thread is advanced 30 minutes, during this period, according to each interval L(60mm) obtain view data.Then, by interval L(60mm) in the calculation times of line width of each silk thread be set to 20 times and calculate the standard deviation of this line width of 20 times.The value of standard deviation is compared with first threshold (15 μm), if standard deviation is less than threshold value, then without the exception in quality.
[embodiment 2]
For the image data set identical with embodiment 1, except the data processing of embodiment 1, also calculate the mean value of line width according to the calculated value of the line width of 20 times, and it can be used as the typical value of line width.In addition, calculate the boundary rectangle width of each silk thread according to view data and interiorly connect rectangle width.When the difference of the typical value (mean value) of external rectangle width and line width is larger than Second Threshold (150 μm), be set to " joint " defect, when the interior difference connecing the mean value of rectangle width and line width is larger than the 3rd threshold value (150 μm), be set to " centre attenuates " defect.
[comparative example]
Described in patent documentation 2, by the image and the boundary rectangle image obtained according to the imagery exploitation image procossing obtained and the interior inspection of comparing middle silk thread of advancing connecing rectangular image that obtain.
In above embodiment 1,2 and comparative example, to the silk thread detected as quality abnormal individually analysis of image data, in Table 1 the quantity being actually quality abnormal is wherein depicted as quality abnormal and correctly detects number, in addition, the quantity not in fact being quality abnormal is depicted as quality abnormal error-detecting number.
[table 1]
According to the result of table 1, known: embodiment 1 and embodiment 2 are compared with comparative example, and quality abnormal error-detecting number reduces.When individually analyzing view data, among the quality abnormal error-detecting number of comparative example, being substantially is only line occurs rock and be detected as the silk thread of quality abnormal or be only diagonal and be detected as the silk thread of quality abnormal.
In addition, known: in embodiment 1, but the standard deviation that flase drop measures line width exceed first threshold boundary rectangle width or in connect the difference of the mean value of rectangle width and line width little and not talkative be the slight exception of defect, but, in example 2, compare the difference of the mean value of boundary rectangle width and line width with Second Threshold and carry out the difference of the mean value connecing rectangle width and line width relatively by the 3rd threshold value, thus, reducing the error detection of quality abnormal further.
According to the result shown in table 1, it is evident that, even if in the silk thread in On line inspection is advanced at a high speed, compared with inspection method in the past, cheap and the error detection of rocking due to line or diagonal causes can be prevented by the inspection method of silk thread of the present invention, and then can detect accurately.
And then, the qualitative data of each silk thread obtained can be used to manage silk thread, the silk thread package of the silk thread that reeled and the quality of silk thread module.In addition, managed the manufacturing process of silk thread by using character data, thus can carry out to high finished product rate the manufacture of silk thread.
Utilizability in industry
According to the present invention, check the silk thread in advancing online simultaneously, carry out the detection of defect accurately, obtain the information of the defect of each silk thread, thereby, it is possible to carry out the qualitative control of silk thread, silk thread package and silk thread module.Therefore, the present invention is suitable for process, the manufacturing procedure of the manufacturing process of silk thread and silk thread, but its range of application is not limited thereto.
The explanation of Reference numeral
1: shooting unit
2: lighting unit
3: data processing unit
B{B
1~ B
n+1}: the background parts that between silk thread and two ends are formed in advancing
ID: view data obtains treating apparatus
L: the interval of regulation
P1: the first side
P2: the second side
R1, R2: silk thread conveying roller
YCD: the direct of travel of silk thread
YCP: the running face of silk thread
YT{YT
1~ YT
n}: silk thread.
Claims (17)
1. an inspection method for silk thread, utilize shooting unit take the silk thread in advancing and utilize data processing unit to carry out data processing to the view data obtained by described shooting unit, the feature of described method is, described data processing comprises:
(a) according to described in the advance view data of middle silk thread calculate the process of the multiple line widths in the interval of the regulation of direct of travel;
B () calculates the process of the deviation of line width according to described multiple line width; And
C process that the deviation of described line width compares with first threshold by ().
2. the inspection method of silk thread according to claim 1, is characterized in that, multiple line widths that the deviation of described line width measures according to the measuring point in the interval of described regulation specified by predetermined Segmentation Number calculate.
3. the inspection method of silk thread according to claim 1 and 2, is characterized in that, described data processing also comprises:
(d) calculate middle silk thread of advancing described in the interval of the regulation of described direct of travel boundary rectangle width and/or in connect the process of rectangle width;
E () calculates the process of the typical value of line width according to described multiple line width; And
(f) by the typical value of described line width and described boundary rectangle width and/or described in connect the process that rectangle width compares.
4. the inspection method of silk thread according to claim 3, is characterized in that, described data processing also comprises:
G process that the difference of the typical value of described line width and described boundary rectangle width compares with Second Threshold by ().
5. the inspection method of the silk thread according to claim 3 or 4, is characterized in that, described data processing also comprises:
(h) by the typical value of described line width and described in connect rectangle width the process that compares with the 3rd threshold value of difference.
6. the inspection method of the silk thread according to any one of claim 3 to 5, is characterized in that, the typical value of described line width is the mean value of multiple line widths that the measuring point in the interval of described regulation specified by predetermined Segmentation Number measures.
7. the inspection method of the silk thread according to any one of claim 3 to 5, is characterized in that, the typical value of described line width is the intermediate value of multiple line widths that the measuring point in the interval of described regulation specified by predetermined Segmentation Number measures.
8. the inspection method of the silk thread according to any one of claim 3 to 5, it is characterized in that, the typical value of described line width is minimum value or the maximal value of multiple line widths that the measuring point in the interval of described regulation specified by predetermined Segmentation Number measures.
9. the inspection method of the silk thread according to any one of claim 3 to 5, it is characterized in that, the line width of the precedence that the typical value of described line width specifies by ascending sort in advance for the multiple line widths measured by the measuring point in the interval of described regulation specified by predetermined Segmentation Number.
10. the inspection method of silk thread according to claim 1 and 2, is characterized in that, described data processing also comprises:
(d) calculate middle silk thread of advancing described in the interval of the regulation of direct of travel boundary rectangle width and/or in connect the process of rectangle width; And
By the line width designed in advance and described boundary rectangle width and/or described in connect the process that rectangle width compares.
The inspection method of 11. silk threads according to claim 10, is characterized in that, described data processing also comprises:
J process that the difference of the described line width that designs in advance and described boundary rectangle width compares with the 4th threshold value by ().
The inspection method of 12. silk threads according to claim 10 or 11, it is characterized in that, described data processing also comprises:
(k) by the described line width that designs in advance and described in connect rectangle width the process that compares with the 5th threshold value of difference.
The inspection method of 13. silk threads according to any one of claim 1 to 12, it is characterized in that, described data processing also comprises:
E () calculates the process of the typical value of line width according to described multiple line width; And
L process that the difference of the typical value of the described line width that designs in advance and described line width compares with the 6th threshold value by ().
The testing fixture of 14. 1 kinds of silk threads, wherein, possesses:
Shooting unit, takes the silk thread in advancing; And
Data processing unit, carries out data processing to the view data utilizing described shooting unit to obtain,
Described testing fixture uses the inspection method of the silk thread described in any one of claim 1 to 13 to check the silk thread in advancing.
The manufacture method of 15. 1 kinds of silk threads, wherein, has: check operation, uses the inspection method of the silk thread described in any one of claim 1 to 13 to check the silk thread in advancing wherein.
16. 1 kinds of silk thread packages, wherein, are made up of the silk thread manufactured by method according to claim 15.
17. 1 kinds of silk thread modules, wherein, are made up of the silk thread manufactured by method according to claim 15.
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| PCT/JP2013/076253 WO2014054528A1 (en) | 2012-10-04 | 2013-09-27 | Thread inspection method, thread inspection device, thread production method, thread package and thread module |
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| CN109804222A (en) * | 2016-12-06 | 2019-05-24 | 日本电气硝子株式会社 | The quality inspection method and glass reel of ribbon glass film |
| CN110857919A (en) * | 2018-08-24 | 2020-03-03 | 东华大学 | Tail yarn defect detection method for package filament |
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| GB201601213D0 (en) * | 2016-01-22 | 2016-03-09 | Mg Sensors Ltd | Yarn imaging device |
| EP4130362A4 (en) * | 2020-04-06 | 2024-08-14 | Murata Machinery Ltd | Thread monitoring device, thread monitoring method, thread winder, and thread monitoring system |
| KR102478600B1 (en) * | 2021-12-27 | 2022-12-15 | 재단법인 한국섬유기계융합연구원 | Fiber arrangement uniformity measurement system of spread carbon fiber using eddy current sensor and method terefor |
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| KR20150063435A (en) | 2015-06-09 |
| JPWO2014054528A1 (en) | 2016-08-25 |
| WO2014054528A1 (en) | 2014-04-10 |
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| JP6260280B2 (en) | 2018-01-17 |
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