CN103074717B - A kind of contactless spandex warping break detecting method - Google Patents
A kind of contactless spandex warping break detecting method Download PDFInfo
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- CN103074717B CN103074717B CN201210533232.4A CN201210533232A CN103074717B CN 103074717 B CN103074717 B CN 103074717B CN 201210533232 A CN201210533232 A CN 201210533232A CN 103074717 B CN103074717 B CN 103074717B
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Abstract
Contactless spandex warping break detecting method belongs to fabric detection field.The present invention gives a kind of contactless spandex warping broken end automatic testing method based on graphical analysis.Invention comprises following content: (1) utilizes industrial camera, computing chip, light source and Programmable Logic Controller etc., and existing spandex warping machine assembles spandex warping broken end automatic checkout system; (2) utilize industrial camera to gather spandex yarn line image in warping process, and the image collected is input in computer chip; (3) image analysis technology is utilized to process spandex yarn line image, the spandex yarn radical in statistical picture; (4) according to the testing result of spandex yarn radical, judge in warping process, whether have spandex yarn to break end, as there is broken end, signal being input in Programmable Logic Controller, by Controlled by Programmable Controller spandex warping machine, making it stop.
Description
Technical field
The present invention relates to a kind of contactless spandex warping break detecting method, with industrial camera, computer chip, light source and Programmable Logic Controller etc., existing spandex warping machine assembles spandex warping broken end automatic checkout system, it belongs to fabric detection field, is specifically related to the Acquire and process technology, automatic control technology etc. of spandex yarn line image.
Background technology
Warping is the fabric width and length that are specified by technological design by the warp thread of certain radical, with uniform, the suitable technical process of tension force close wind in warp beam or beam of a loom, is one of critical process of Weaving prepartion.The quality of warp beam or beam of a loom quality directly will have influence on the slurry quality of axle and the efficiency of loom, on the production efficiency of next operation and product volume impact very large.Whether warping end break self-stop is a principal element of beam of a loom or warp beam winding quality quality in time.
The warping machines broken yarn detection system that current textile industry uses can be divided into two classes substantially: a class is mechanical type electrical contact formula checkout gear, as drop type checkout gear; Another kind of is electronic type checkout gear, as capacitance type sensor and electro-optical pickoff checkout gear etc.For high-elasticity yarn, such as spandex, menopause tablet own wt can make spandex produce very large deformation, adds additional tension to spandex, and easily causes system broken yarn to judge by accident.Traditional contact-type detection, its core completes broken yarn with menopause tablet and detects, the use of traditional mechanical type and electronic type detection system of this performance limitations of spandex, this just requires should use sensitiveer, reliable noncontacting proximity sensor to the warping broken yarn detection system of spandex, reduces the contact point of elastomeric yarn and machine as far as possible.
The present invention gives a kind of contactless spandex warping broken end automatic testing method based on graphical analysis.Invention comprises following content: (1) utilizes industrial camera, computer chip, light source and Programmable Logic Controller etc., and existing spandex warping machine assembles spandex warping broken end automatic checkout system; (2) utilize industrial camera to gather spandex yarn line image in warping process, and the image collected is input in computer chip; (3) image analysis technology is utilized to process spandex yarn line image, the spandex yarn radical in statistical picture; (4) according to the testing result of spandex yarn radical, judge in warping process, whether have spandex yarn to break end, as there is broken end, signal being input in Programmable Logic Controller, by Controlled by Programmable Controller spandex warping machine, making it stop.The idiographic flow that spandex Yarn break detects as shown in Figure 1.
Summary of the invention
The object of this invention is to provide a kind of contactless spandex warping break detecting method, for the automatic detection of Yarn break in spandex warping process.The technical solution used in the present invention is as follows:
(1) utilize industrial camera, computer chip, light source and Programmable Logic Controller etc., spandex warping machine is installed spandex Yarn break automatic checkout system, for the non-contact automatic detection of spandex Yarn break in warping process;
(2) camera can collect all spandex yarn line images of spandex warping machine in warping process, and spandex yarn is clear and legible, every root spandex yarn at least accounts for 1 independently pixel, and the spandex yarn line image collected can be transported in computer chip by data-interface by camera;
(3) computer chip can obtain by data communication interface the spandex yarn line image that industrial camera collects, and complete the process of spandex yarn line image, the spandex yarn radical comprised in image detected, to judge in warping process, whether spandex breaks end, and by output interface, testing result can be transported in Programmable Logic Controller able to programme, the computer chip adopted can be to complete the computer CPU of image procossing, dsp chip, ARM chip and fpga chip etc.;
(4) Programmable Logic Controller accepts the broken end testing result of computer chip by data communication interface, when there is broken end, controlling the main frame of spandex warping machine, making it stop, complete spandex yarn wire terminal by workman.
Accompanying drawing explanation
Fig. 1 spandex Yarn break testing process
Fig. 2 spandex yarn warping broken end detection system
Spandex yarn line image when Fig. 3 does not occur to break end
Spandex yarn line image when Fig. 4 occurs to break end
Fig. 5 spandex yarn line image threshold value result
Detailed description of the invention
Fig. 2 is spandex Yarn break automatic checkout system in spandex warping process.Cheese 1 is positioned on bobbin cradle 2, and conventional bobbin cradle is combination vehicle formula bobbin cradle; Yarn said that lease reed 3 completed preliminary combing, and then by lever jack 4 and back reed 5, spandex yarn arranges evenly gradually; After guide rod 6, spandex yarn arrays is even and smooth, installs light source 7 and industrial camera 8, complete the collection of spandex yarn line image between cord roller 6 and lever jack 10; After Yarn break being detected, broken end signal is flowed to spandex warping machine, makes machine shut-down.
The IMAQ point distance warp beam 15 that the present invention proposes also has a segment distance, broken yarn can be avoided to be involved in layer, stop in time after system identification Yarn break, can prevent lappers, strand head, thus improve warp quality.
Fig. 3 is the spandex yarn line image collected in a width invention example, and now yarn breaks end.Fig. 4 is spandex yarn line image when there is broken end.
In computer chip, doing threshold process to collecting spandex yarn, being partitioned into the position of yarn.In invention example, black background is placed below spandex yarn, light source adopts White LED light source, between yarn and background, contrast is larger, Threshold selection is comparatively easy, using the average of entire image as threshold value in invention example, complete the segmentation of spandex yarn line image, Fig. 5 is the Threshold segmentation result of Fig. 3.
Select the image middle row pixel shown in Fig. 5 as the counting line of spandex yarn radical, traveling through from left to right, when being transitioned into white yarn point by black background point in image, spandex yarn radical being added 1.
When spandex yarn breaks end, the spandex yarn radical detected can reduce, and now broken end signal is sent to Programmable Logic Controller, sends stop sign by Programmable Logic Controller, controls spandex warping machine Main Engine Cut-Off, is completed the joint of broken yarn by workman.
Claims (4)
1. a contactless spandex warping break detecting method, it is characterized in that: utilize industrial camera, computer chip, light source and Programmable Logic Controller, spandex warping machine is installed spandex Yarn break automatic checkout system, for the non-contact automatic detection of spandex Yarn break in warping process; Computer chip can obtain by data communication interface the spandex yarn line image that industrial camera collects, and complete the process of spandex yarn line image, the spandex yarn radical comprised in image detected, to judge in warping process, whether spandex breaks end, and testing result can be transported in Programmable Logic Controller by output interface, the computer chip adopted to complete the computer CPU of image procossing, dsp chip, ARM chip and fpga chip.
2. contactless spandex warping break detecting method according to claim 1, it is characterized in that: described industrial camera can collect all spandex yarn line images of spandex warping machine in warping process, and spandex yarn is clear and legible, every root spandex yarn at least accounts for 1 independently pixel, and the spandex yarn line image collected can be transported in computer chip by data-interface by camera.
3. contactless spandex warping break detecting method according to claim 1, it is characterized in that: the brightness of illumination of described light source, the uniformity, luminous spectral characteristic also must meet the requirement that spandex Yarn break detects, can under the cooperation of certain background, clear display spandex yarn.
4. contactless spandex warping break detecting method according to claim 1, it is characterized in that: described Programmable Logic Controller, the broken end testing result of computer chip is accepted by data communication interface, when there is broken end, control the main frame of spandex warping machine, make it stop, complete spandex yarn wire terminal by workman.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103614827A (en) * | 2013-11-27 | 2014-03-05 | 太仓仕禾线网制造有限公司 | Human-computer interface automatic thread breakage prompt alarm realizing method |
| CN105374046A (en) * | 2015-12-03 | 2016-03-02 | 江南大学 | Spinning machine online end breaking detection apparatus and detection algorithm based on spun yarn images |
| CN107354576A (en) * | 2017-07-17 | 2017-11-17 | 福建榕融芯微电子科技有限公司 | A kind of broken yarn vision detection system for reducing light interference |
| CN107356597A (en) * | 2017-07-17 | 2017-11-17 | 福建榕融芯微电子科技有限公司 | A kind of broken yarn vision detection system of modified form |
| CN107402222A (en) * | 2017-09-07 | 2017-11-28 | 苏州艾乐蒙特机电科技有限公司 | A kind of spinning equipment the end of a thread scanning software |
| CN108866733A (en) * | 2018-09-05 | 2018-11-23 | 张家港市利佳纺织有限公司 | A kind of spandex warping broken yarn automatic processing device |
| CN113870233B (en) * | 2021-09-30 | 2022-07-15 | 常州市宏发纵横新材料科技股份有限公司 | Binding yarn detection method, computer equipment and storage medium |
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| CN202175829U (en) * | 2010-12-27 | 2012-03-28 | 中国船舶重工集团公司第七一五研究所 | On-line real-time detection system for gray fabric flaw based on machine vision |
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Effective date of registration: 20200818 Address after: 314422 Haining Textile Science and Technology Industrial Park, Jiaxing City, Zhejiang Province (No.60 wengxu Road, Xucun town) Patentee after: Zhejiang Shengli Textile Co.,Ltd. Address before: 1800 No. 214122 Jiangsu city of Wuxi Province Li Lake Avenue Patentee before: Jiangnan University |
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Denomination of invention: A non-contact detection method for end breakage of spandex warping Effective date of registration: 20210918 Granted publication date: 20160420 Pledgee: Zhejiang Haining Rural Commercial Bank Co.,Ltd. Xucun sub branch Pledgor: Zhejiang Shengli Textile Co.,Ltd. Registration number: Y2021330001664 |