CN111441137A - Intelligent yarn breaking stopping control method for jacquard and jacquard - Google Patents
Intelligent yarn breaking stopping control method for jacquard and jacquard Download PDFInfo
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- CN111441137A CN111441137A CN202010237708.4A CN202010237708A CN111441137A CN 111441137 A CN111441137 A CN 111441137A CN 202010237708 A CN202010237708 A CN 202010237708A CN 111441137 A CN111441137 A CN 111441137A
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- jacquard
- stop
- pattern
- jacquard machine
- machine
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
- D04B35/10—Indicating, warning, or safety devices, e.g. stop motions
- D04B35/14—Indicating, warning, or safety devices, e.g. stop motions responsive to thread breakage
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0004—Industrial image inspection
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/12—Edge-based segmentation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/181—Segmentation; Edge detection involving edge growing; involving edge linking
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/20—Special algorithmic details
- G06T2207/20024—Filtering details
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30108—Industrial image inspection
- G06T2207/30124—Fabrics; Textile; Paper
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- Engineering & Computer Science (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Textile Engineering (AREA)
- Quality & Reliability (AREA)
- Looms (AREA)
Abstract
The invention relates to the field of textile equipment, and discloses an intelligent yarn breaking and stopping control method for a jacquard machine and the jacquard machine, wherein the intelligent yarn breaking and stopping control method for the jacquard machine comprises the following steps: acquiring pattern data of jacquard, and calculating a pattern area in the jacquard; recording the yarn breaking position when the yarn is broken, and calculating the stop width of the jacquard; and controlling the jacquard machine to stop according to the yarn breaking position and the stop width, so that the jacquard machine is stopped outside a pattern area in jacquard. According to the jacquard machine, the pattern area in the jacquard is calculated, the yarn breaking position is recorded, the halt width of the jacquard machine is calculated, and the jacquard machine is controlled to halt according to the yarn breaking position and the halt width, so that the jacquard machine is halted outside the pattern area in the jacquard machine, and halt marks caused by yarn breaking fall in the non-pattern area of the cloth, therefore, the yield of jacquard warp-knitted fabrics is greatly improved, and the waste of the cloth is reduced.
Description
Technical Field
The invention relates to the field of textile equipment, in particular to an intelligent yarn breaking stopping control method for a jacquard machine and the jacquard machine.
Background
The jacquard loom can make each jacquard guide needle do independent yarn-laying movement in a certain range, so that the jacquard loom can weave patterns with unlimited size. The jacquard is mainly used for producing fabrics such as vamps, clothes, curtains, tablecloths and the like.
During jacquard weaving, yarn breakage can occur due to reasons such as yarn quality, and the machine needs to be stopped for wiring after yarn breakage. In the process of halt and start of a jacquard machine, a halt mark is generated on cloth due to fluctuation of yarn tension, and the halt mark is a difficult point which cannot be solved in the warp knitting industry at present. If the jacquard is in a pattern position when the jacquard is stopped, for example, the jacquard is stopped in a black rectangular area, the quality of the cloth is seriously affected, and the pattern of the whole line of the cloth is scrapped.
In the prior patent entitled "broken yarn stopping system", patent No. CN103924364A, a technique for detecting broken yarns and immediately stopping the broken yarns is implemented. In the technical scheme of the patent, a stop mark is still generated on the cloth, and the stop mark is still likely to stop at the pattern position, so that the problem that the pattern of the whole row in the cloth is scrapped also exists.
Disclosure of Invention
Therefore, an intelligent yarn breaking and stopping control method for a jacquard machine is needed to be provided, and the technical problem that when yarn is broken by the existing jacquard machine, a stopping mark is easy to fall in a pattern area, and cloth quality is affected is solved.
In order to achieve the purpose, the inventor provides an intelligent yarn breaking and stopping control method for a jacquard, which comprises the following steps:
acquiring pattern data of jacquard, and calculating a pattern area in the jacquard;
detecting whether the jacquard machine has yarn breakage, if so, recording the yarn breakage position, and calculating the shutdown width of the jacquard machine;
and controlling the jacquard machine to stop according to the yarn breaking position and the stop width, so that the jacquard machine is stopped outside a pattern area in jacquard.
Further, the step of acquiring jacquard pattern data of the jacquard pattern and calculating a pattern area in the jacquard pattern comprises the following steps of:
analyzing pattern data of jacquard of the jacquard to obtain a pattern diagram;
carrying out Gabort filtering processing on the pattern diagram;
introducing a Heaviside function H and a level set vector function phi, and constructing a dual-level set Munford-shah vector image segmentation model;
identifying a pattern profile according to a double-level set Munford-shah vector image segmentation model;
and finding the edge transverse parallel lines of the extreme values of the contour of the boundary through the extreme values of the contour.
Further, the step of performing Gabort filtering processing on the flower pattern diagram includes:
constructing a two-dimensional Gabort function, wherein the Gabort function comprises a real part and an imaginary part;
and obtaining multi-channel sub-images of the texture image of the pattern graph, and respectively filtering the multi-channel sub-images by using the real part and the imaginary part of the Gabort function.
Further, the step of controlling the jacquard loom to stop according to the yarn breaking position and the stop width so that the jacquard loom is stopped outside a pattern area in the jacquard loom comprises the following steps of:
obtaining the width h from the yarn breaking position to the end of the next non-pattern area;
judging whether the stop width of the jacquard is larger than the width h, if so, controlling the jacquard to stop in the next non-pattern area; if not, controlling the jacquard machine to stop in the next non-pattern area.
And further, whether emergency shutdown or key positioning shutdown is received or not is detected, if the emergency shutdown is received, the jacquard machine is controlled to be immediately shut down, and if the key positioning shutdown is received, the jacquard machine is controlled to be shut down according to the shutdown width, so that the jacquard machine is shut down outside a pattern area in jacquard.
In order to solve the above technical problem, the present invention provides another technical solution: the jacquard machine can execute the intelligent yarn breaking and stopping control method of the jacquard machine in any one of the technical schemes during working.
Different from the prior art, according to the technical scheme, the jacquard pattern area in the jacquard is calculated, the yarn breaking position is recorded, the halt width of the jacquard is calculated, the jacquard is controlled to halt according to the yarn breaking position and the halt width, the jacquard is halted outside the pattern area in the jacquard, and therefore halt marks caused by yarn breaking fall in the non-pattern area of the cloth, the yield of jacquard warp-knitted fabrics is greatly improved, and the waste of the cloth is reduced.
Drawings
FIG. 1 is a flow chart of an intelligent yarn breaking and stopping control method for a jacquard machine according to the present invention;
FIG. 2 is a flow diagram of an embodiment for determining a contour of a flower shaped region;
FIG. 3 is a flow chart of a jacquard intelligent yarn-break stop control method according to an embodiment;
FIG. 4 is a diagram illustrating the effect of single image segmentation by a dual level set Munford-shah model according to the embodiment;
FIG. 5 is a jacquard cloth schematic diagram obtained after processing;
Detailed Description
To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Referring to fig. 1, the present embodiment provides a jacquard intelligent yarn-breaking parking control method, which includes the steps of:
s101, pattern data of the jacquard are obtained, and a pattern area in the jacquard is calculated.
S102, detecting whether the jacquard machine has yarn breakage, if so, recording the yarn breakage position, and calculating the stop width of the jacquard machine;
and S103, controlling the jacquard machine to stop according to the yarn breaking position and the stop width, so that the jacquard machine is stopped outside a pattern area in jacquard.
The jacquard data is original pattern data input into a jacquard machine, and the jacquard machine conducts weaving according to the pattern data to obtain cloth with a pattern area and a non-pattern area. Analyzing the obtained flower shape data to obtain a flower shape graph, and processing the flower shape graph to obtain a boundary extreme value of a flower type area in the cloth. Specifically, a two-dimensional Gabort function can be constructed after the flower pattern diagram is obtained, wherein the Gabort function comprises a real part and an imaginary part; and obtaining multi-channel sub-images of the texture image of the pattern graph, and respectively filtering the multi-channel sub-images by using the real part and the imaginary part of the Gabort function.
Wherein:
x′＝x cosθ+y sinθ；
y′＝-x sinθ+y cosθ；
meaning and explanation of parameters:
λ: represents a sinusoidal wavelength;
θ: represents the normal angle direction of the parallel stripes;
psi: representing a phase difference;
σ: a variance parameter representing a gaussian;
γ: represents a spatial aspect ratio;
as shown in fig. 2, in one embodiment, the step of "acquiring pattern data of a jacquard pattern and calculating pattern areas in the jacquard pattern" includes: analyzing pattern data of jacquard of the jacquard to obtain a pattern diagram; carrying out Gabort filtering processing on the pattern diagram; introducing a Heaviside function H and a level set vector function phi, and constructing a dual-level set Munford-shah vector image segmentation model; identifying a pattern profile according to a double-level set Munford-shah vector image segmentation model; and finding the edge transverse parallel lines of the extreme values of the contour of the boundary through the extreme values of the contour. Constructing a Munford-shah vector image segmentation model:
wherein:
uo,i: representing the ith sub-image of the original vector image;
ui +and ui -: respectively representing the ith sub-image uo,iA smooth approximation function inside and outside curve C. The step of performing Gabort filtering processing on the flower pattern diagram comprises the following steps: a two-dimensional Gabort function is constructed.
Introducing a Heaviside function H and a level set vector function phi, and constructing a dual-level set Munford-shah vector image segmentation model:
wherein:
u++，u+-，u-+u--representing smooth approximate functions in different areas under the 'four-color theorem';
φ1，φ2the method is characterized by comprising the steps of representing a double-level set function vector, as shown in FIG. 4, representing a single image segmentation effect graph of a double-level set Munford-shah model, as shown in FIG. 5, representing a jacquard cloth schematic diagram obtained after processing, wherein L1 and L2 are transverse parallel lines of extreme edges of a pattern profile, and L1 and L2 areas are non-pattern areas.
The step of controlling the jacquard loom to stop according to the yarn breaking position and the stop width so that the jacquard loom is stopped outside a pattern area in jacquard loom comprises the following steps: obtaining the width w from the yarn breaking position to the end of the next non-pattern area; judging whether the stop width of the jacquard is larger than the width w, if so, controlling the jacquard to stop in the next non-pattern area; if not, controlling the jacquard machine to stop in the next non-pattern area.
The intelligent yarn-breaking parking control method for the jacquard machine further comprises the steps of detecting whether an emergency stop or a key positioning stop is received, controlling the jacquard machine to stop immediately if the emergency stop is received, and controlling the jacquard machine to stop according to the stop width if the key positioning stop is received, so that the jacquard machine stops outside a pattern area in jacquard.
As shown in fig. 3, a flowchart of the jacquard intelligent yarn-breaking stop control method in an embodiment includes the following steps:
the jacquard machine normally operates;
when the jacquard machine runs, detecting whether the jacquard machine is stopped in an emergency mode, a key positioning mode or a relay positioning mode;
if the emergency stop is detected, controlling the jacquard machine immediately;
if the key-press positioning halt or the yarn-relay positioning halt is detected, controlling the jacquard loom to halt according to the intelligent yarn-breaking halt control method of the jacquard loom, and specifically, the method comprises the following steps:
calculating the row and column number r1 of the jacquard machine when the jacquard machine is stopped if the jacquard machine is stopped immediately;
calculating the shutdown transverse width w of the jacquard;
acquiring the ending row column number r2 of the next non-pattern type area;
judging r1< w < r2, if so, the optimal shutdown position is the starting row and column number of the next non-flower type area (namely, between horizontal parallel lines L1 and L2 at the edge of the extreme value of the flower type outline in fig. 5), and if not, the optimal shutdown position is the starting row and column number of the next non-flower type area;
and the jacquard machine is stopped to the optimal stop position.
In another embodiment, a jacquard machine is provided, and the jacquard machine executes the jacquard machine intelligent yarn breaking and stopping control method in any one of the above technical schemes during work.
It should be noted that, although the above embodiments have been described herein, the invention is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein, or by using equivalent structures or equivalent processes performed in the content of the present specification and the attached drawings, which are included in the scope of the present invention.
Claims (6)
1. An intelligent yarn breaking parking control method for a jacquard machine is characterized by comprising the following steps:
acquiring pattern data of jacquard, and calculating a pattern area in the jacquard;
detecting whether the jacquard machine has yarn breakage, if so, recording the yarn breakage position, and calculating the shutdown width of the jacquard machine;
and controlling the jacquard machine to stop according to the yarn breaking position and the stop width, so that the jacquard machine is stopped outside a pattern area in jacquard.
2. The jacquard intelligent yarn cutting stop control method according to claim 1, wherein the step of obtaining jacquard pattern data and calculating pattern areas in the jacquard pattern comprises:
analyzing pattern data of jacquard of the jacquard to obtain a pattern diagram;
carrying out Gabort filtering processing on the pattern diagram;
introducing a Heaviside function H and a level set vector function phi, and constructing a dual-level set Munford-shah vector image segmentation model;
identifying a pattern profile according to a double-level set Munford-shah vector image segmentation model;
and finding the edge transverse parallel lines of the extreme values of the contour of the boundary through the extreme values of the contour.
3. The jacquard intelligent yarn-breaking stop control method according to claim 2, wherein the step of Gabort filtering the pattern comprises:
constructing a two-dimensional Gabort function, wherein the Gabort function comprises a real part and an imaginary part;
and obtaining multi-channel sub-images of the texture image of the pattern graph, and respectively filtering the multi-channel sub-images by using the real part and the imaginary part of the Gabort function.
4. The jacquard intelligent yarn cutting stop control method according to claim 2, wherein the step of controlling the jacquard stop according to the yarn cutting position and the stop width so that the jacquard stop is outside a pattern area in the jacquard comprises:
obtaining the width h from the yarn breaking position to the end of the next non-pattern area;
judging whether the stop width of the jacquard is larger than the width h, if so, controlling the jacquard to stop in the next non-pattern area; if not, controlling the jacquard machine to stop in the next non-pattern area.
5. The jacquard machine intelligent yarn-breaking stop control method according to any one of claims 1 to 4, characterized by further comprising detecting whether an emergency stop or a key-positioned stop is received, controlling the jacquard machine to stop immediately if the emergency stop is received, and controlling the jacquard machine to stop according to a stop width if the key-positioned stop is received, so that the jacquard machine stops outside a pattern area in jacquard.
6. A jacquard machine, characterized in that the jacquard machine executes the jacquard machine intelligent yarn-breaking stop control method of any one of claims 1 to 5 when in work.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5390512A (en) * | 1992-08-14 | 1995-02-21 | Karl Mayer Textilmaschinenfabrik Gmbh | Warp knitting machine with piezoelectrically controlled jacquard patterning |
| CN203513959U (en) * | 2013-09-30 | 2014-04-02 | 常州市第八纺织机械有限公司 | Emergency stop control device of yarn pressing type Jacquard warp knitting machine |
| CN103839248A (en) * | 2012-11-22 | 2014-06-04 | 北京三星通信技术研究有限公司 | Image segmentation method and apparatus |
| CN104328600A (en) * | 2014-11-12 | 2015-02-04 | 江南大学 | Design and implementation method for float starting control program of float type jacquard warp knitting machine |
| CN106012275A (en) * | 2016-05-12 | 2016-10-12 | 东华大学 | Embedded piezoelectric jacquard control system and control method |
| CN108677372A (en) * | 2018-05-30 | 2018-10-19 | 江南大学 | A kind of power-off of tricot machine Jacquard electronic jacquard is sequeled control method |
| CN108893857A (en) * | 2018-07-03 | 2018-11-27 | 江南大学 | A kind of tricot machine electronics horizontal movement jacquard weave power-off is sequeled control method |
-
2020
- 2020-03-30 CN CN202010237708.4A patent/CN111441137B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5390512A (en) * | 1992-08-14 | 1995-02-21 | Karl Mayer Textilmaschinenfabrik Gmbh | Warp knitting machine with piezoelectrically controlled jacquard patterning |
| CN103839248A (en) * | 2012-11-22 | 2014-06-04 | 北京三星通信技术研究有限公司 | Image segmentation method and apparatus |
| CN203513959U (en) * | 2013-09-30 | 2014-04-02 | 常州市第八纺织机械有限公司 | Emergency stop control device of yarn pressing type Jacquard warp knitting machine |
| CN104328600A (en) * | 2014-11-12 | 2015-02-04 | 江南大学 | Design and implementation method for float starting control program of float type jacquard warp knitting machine |
| CN106012275A (en) * | 2016-05-12 | 2016-10-12 | 东华大学 | Embedded piezoelectric jacquard control system and control method |
| CN108677372A (en) * | 2018-05-30 | 2018-10-19 | 江南大学 | A kind of power-off of tricot machine Jacquard electronic jacquard is sequeled control method |
| CN108893857A (en) * | 2018-07-03 | 2018-11-27 | 江南大学 | A kind of tricot machine electronics horizontal movement jacquard weave power-off is sequeled control method |
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