CN1058438A - Method for testing fabric density and unevenness thereof - Google Patents
Method for testing fabric density and unevenness thereof Download PDFInfo
- Publication number
- CN1058438A CN1058438A CN 90109490 CN90109490A CN1058438A CN 1058438 A CN1058438 A CN 1058438A CN 90109490 CN90109490 CN 90109490 CN 90109490 A CN90109490 A CN 90109490A CN 1058438 A CN1058438 A CN 1058438A
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- fabric
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- 239000004744 fabric Substances 0.000 title claims abstract description 26
- 238000012360 testing method Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title abstract description 9
- 230000001788 irregular Effects 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000007639 printing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims 1
- 230000001795 light effect Effects 0.000 claims 1
- 230000005622 photoelectricity Effects 0.000 claims 1
- 230000000644 propagated effect Effects 0.000 claims 1
- 230000035807 sensation Effects 0.000 claims 1
- 230000003287 optical effect Effects 0.000 abstract description 8
- 238000003384 imaging method Methods 0.000 description 6
- 230000004075 alteration Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 241001234523 Velamen Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
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Abstract
The invention relates to a method for testing warp (weft) yarn density and unevenness of a fabric. Warp (or weft) of the fabric forms light spots with alternate light and shade by a set of optical system, and the photoelectric pulse period and cycle formed by each yarn is input into a singlechip for processing by a photosensitive sensor and an electronic or mechanical scanning device, so that the number of yarns and the uneven index of the fabric within each 100mm can be displayed. Multiple tests on the same batch of fabric can also show their average, maximum and minimum, and out-of-uniformity, among others. During testing, the instrument is aligned to the warp and weft directions, and the test result can be displayed by pressing the key for about two seconds.
Description
The present invention relates to fabric method of testing through warp (latitude) yarn density of (latitude) yarn radical-promptly and irregularity thereof in unit length.
Existing method is that the tester turns screw rod by the root counting under special-purpose magnifying glass (pick glass), and testing length 50mm is converted into the radical in every 100mm length then.Recently have to copy yet and under projecting apparatus, watch counting with the method for printing opacity abroad, but it is not suitable for high density fabric.More than two kinds of methods all can't measure the density irregularity index.
The objective of the invention is to study a kind of Photoelectric Detection and demonstration Density and irregular method thereof utilized, use for textile enterprise and commodity inspection department.
The object of the present invention is achieved like this: collimated light beam is penetrated on fabric from a side of tested yarn at a certain angle, and the side in addition of surveying yarn at every velamen forms shade.Organizational structure of fabrics through the optical system of forming by cylindrical lens etc. after tested yarn imaging clear, non-tested yarn imaging paste mould makes the one-dimentional structure that original longitude and latitude interweaves (see that Fig. 1 a) converts light and dark one dimension stripe image (seeing Fig. 1 b) to.Through electron scanning or mechanical scanning, this striped is incident upon on the light sensor by root and forms light pulse and change electric impulse signal into, again through electronic circuit amplify, shaping, step-by-step counting and data handle and can show automatically through weft count, density irregularity and with the mean value behind a collection of fabric multi-point sampler, minimax value, outer irregular or the like.
Characteristics of the present invention are: utilize the reflection of light Imaging Principle, the rare close collection that can not influence signal of the thickness of fabric; Utilize the cylindrical lens one dimension to amplify (or dwindling) principle, make of the arranged radially of non-tested yarn along lens, make the imaging of threads be focused into a hot spot (see 1 among Fig. 1,2 ... n), tested yarn forms light and dark striped and (sees 1 among Fig. 1 ', 2 ' in this hot spot ... n '), thus plain weave, twill and Yi Ban De Xia line organize all applicable; Adopt technology such as digital filtering and automatic gain, reference voltage with the average voltage of light and shade striped during as the pulse signal shaping, white is smeared to strengthen reflection of light in the deep-colour fabric surface simultaneously, eliminates the influence to the high-low level conversion of fabric color and contrast difference.
Different according to optical system and scan mode, the present invention can have various implementation method, now is exemplified below:
Mode one is formed optical system by two groups of cylindrical lenses and is formed light pulse in the mechanical scanning mode
The structural representation of this mode as shown in Figure 2.Electric light source 1 is penetrated on fabric by right-hand, cylindrical lens 2 amplifies (length is constant) with the tested yarn diameter of local fabric, on this basis with 2 one-tenth 90 ° cylindrical lens 3 reduced with non-tested yarn, make threads focus on the back and be incident upon on the light sensor 5 by slit 4, the width of slit is less than the projection of diameter on sensor of high yarn count.To cross over tested one by one yarn horizontal when mobile when motor 6 drives 1,2,3,4,5, whenever moves an one thread and promptly form the light pulse that a light and shade replaces on 5, and convert electric impulse signal to.Get final product data such as acquisition pulse number and cycle on the I/O mouth of this signal through amplification, shaping input single-chip microcomputer, the pulse number in the unit length is a thread density, and the difference of pulse period is the density irregularity rate.The start and stop position of motor and direction are by positioning switch and logic circuit control, and testing length is by the strict control in frame hole of optoelectronic switch or instrument below.Only need during test the groove of peephole 7 is aimed at tested yarn, press button, can show test results, take about about two seconds.
Mode two is formed optical system by one group of enlarging lens and one group of cylindrical lens and is adopted the mechanical scanning mode
Mode two is to replace first group of lens (referring to Fig. 3) with general sphere enlarging lens with the difference of mode one.Earlier the two-dimensional fabric structure in the subrange is amplified comprehensively,, many non-tested yarns are focused on again by cylindrical lens.All the other are identical with mode one, repeat no more here.
Mode three is formed optical system by one group of miniature camera lens and one group of cylindrical lens and is adopted the electron scanning mode
As shown in Figure 4, directional light 1 is incident upon the long tested fabric face of whole 100mm by tested yarn one side, after dwindling the two-dimentional institutional framework of fabric comprehensively, miniature camera lens 4 by cylindrical lens 5 non-tested yarn is focused on again, imaging on final online battle array mage reconstructor tube sensor (CCD) 6, thousands of (as 2560) individual pixel that is arranged in delegation is arranged on the CCD, and this pixel is made up of photodiode, MOS type field effect transistor switch and shift register.The one dimension striped imaging of fabric is incident upon the light and shade that forms on the photodiode as shown in Figure 5 and distributes.Be subjected to light pixel 1 electric charge accumulation more among the figure, be not subjected to light pixel electric charge less, at regular intervals electric charge is carried out the pulse signal that serial converted promptly forms different cycles, also can calculate and show every result with mode one is similar in this signal input single-chip microcomputer.
Should note following key during the invention process: 1, optical system answers coating black delustring seven to prevent the interference of stray light; 2, when assembling should strictly grasp peephole groove, cylindrical lens axially, the orientation or the electric-motor drive direction of CCD line array sensor light element be in full accord with the placement direction through (latitude) yarn; When 3, adopting frame hole control testing length, the light in frame hole is injected side should be processed into groove, blocks tested yarn (see among 8 and Fig. 4 of Fig. 2 7) with the shade that prevents frame hole thickness; 4, mode one, two also requires motor steady, and constant airspeed makes the pulse period of collection can represent distance between the corresponding yarn; 5, mode three does not have moving component, but optical system should be eliminated aberration or in software relevant aberration be revised.
The present invention can replace artificial several numbers conventional test methodologies, provide Density irregular detection means.Only need during test the peephole groove of instrument is aimed at tested yarn, press button, can show test results.The present invention is applicable to the cotton of general fabrics structure, chemical fibre, fiber crops, silk and the wool fabric or the like of plucking not.Knitted fabric is if can also can detect the alignment of yarn circle.
Claims (5)
1, a kind ofly detects automatically, shows that with photoelectricity fabric is through (latitude) density its irregular method of testing.Prior art is watched yarn radical several unit lengths in by root for the tester under pick glass or projecting apparatus, can't measure the irregularity index.Feature of the present invention is: the two-dimentional institutional framework that A, the principle of utilizing the cylindrical lens one dimension to amplify (or dwindling) interweave longitude and latitude changes light and dark one dimension stripe image into, can be in order to test the fabric of various institutional frameworks; B, make the light and shade hot spot of one dimension striped change photoelectric pulse signal into by photosensitive propagated sensation device and electronics (or machinery) scanning system, C, the effect of employing reflection of light obtain image, and change the signal of telecommunication into high-low level with auto-gain circuit, handle and can show test results in this level signal input single-chip microcomputer.
2, cylindrical lens according to claim 1 is characterized in that along its diameter of yarn of lens axially-aligned constant, radially it is straight scalable or dwindle for the yarn of Pai Lieing, more than ten non-tested yarns can be focused into fuzzy hot spot on light-sensitive element and tested yarn keeps light and shade striped clearly by these lens, thereby general plain weave, twill, Xia line are all applicable.
3, reflection of light effect according to claim 1 is characterized in that not adopting the printing opacity mode, all unlikely signals collecting that influences of the thickness of fabric and density.
4, photosignal according to claim 1 is characterized in that the pulse number of being gathered can represent the yarn radical, and the cycle of each pulse can be represented the distance between the yarn, but thereby bulk density and mean square deviation ... etc. index.
Make reference voltage with the average voltage of light and shade striped when 5, auto-gain circuit according to claim 1 is characterized in that signal shaping, thereby can eliminate the different influences of fabric heterochromia the conversion high-low level with contrast.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90109490 CN1058438A (en) | 1990-11-24 | 1990-11-24 | Method for testing fabric density and unevenness thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90109490 CN1058438A (en) | 1990-11-24 | 1990-11-24 | Method for testing fabric density and unevenness thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1058438A true CN1058438A (en) | 1992-02-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90109490 Pending CN1058438A (en) | 1990-11-24 | 1990-11-24 | Method for testing fabric density and unevenness thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1058438A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1648321B (en) * | 2005-02-01 | 2010-05-12 | 西安工程科技学院 | Method for detecting fabric texture |
| CN103433925A (en) * | 2013-07-31 | 2013-12-11 | 北京配天大富精密机械有限公司 | Method for returning robot to starting point, robot running method, robot and robot control device |
| RU2552026C1 (en) * | 2013-12-11 | 2015-06-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Ивановский государственный политехнический университет" | Device for controlling fabric density on weft |
| CN106400443A (en) * | 2016-10-24 | 2017-02-15 | 苏州维度丝绸有限公司 | Silk density detection method |
-
1990
- 1990-11-24 CN CN 90109490 patent/CN1058438A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1648321B (en) * | 2005-02-01 | 2010-05-12 | 西安工程科技学院 | Method for detecting fabric texture |
| CN103433925A (en) * | 2013-07-31 | 2013-12-11 | 北京配天大富精密机械有限公司 | Method for returning robot to starting point, robot running method, robot and robot control device |
| RU2552026C1 (en) * | 2013-12-11 | 2015-06-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Ивановский государственный политехнический университет" | Device for controlling fabric density on weft |
| CN106400443A (en) * | 2016-10-24 | 2017-02-15 | 苏州维度丝绸有限公司 | Silk density detection method |
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