CN108717706A - Semi-automatic bunchy yarn process parameter identification method based on bunchy yarn fabric - Google Patents

Abstract

The invention provides a semi-automatic identification method of slub yarn process parameters based on slub yarn fabric, which belongs to the technical field of new textile automation. Firstly, the image acquisition of the incoming fabric is carried out, and then the slubs on the same yarn of the fabric are placed on the same line as much as possible by image rotation, and then multiple fabric images are connected by image stitching, and then the coordinate positioning method is used to locate the slubs in the fabric. The bamboo joints are marked and connected, and the coordinate position of the bamboo joints is automatically recorded. Finally, the coordinate position data is analyzed to realize the identification of the length of the bamboo joints, the distance between the bamboo joints and the period of the bamboo joints, so as to overcome the shortcomings of the existing manual detection methods and improve the quality of the fabric. The accuracy of the detection of medium slub yarn, while liberating productivity, is compatible with modern textile automation production.

Description

A semi-automatic identification method of slub yarn process parameters based on slub yarn fabric

technical field

The invention belongs to the technical field of novel textile automation, and relates to a semi-automatic identification method for process parameters of slub yarn fabrics.

Background technique

Slub yarn is a kind of fancy yarn. The fabric surface woven with slub yarn has a three-dimensional effect and is widely used in denim, high-end underwear and decorative products. The process parameters in the production of slub yarn mainly include slub length, slub spacing, slub multiplier and slub type, etc. These process parameters can be analyzed by Uster Tester 5. However, in actual production, the incoming samples of slub yarn fabrics are often in the form of fabrics, and it is impossible to directly use the evenness meter for parameter identification. At present, it can only rely on manual analysis.

When manually analyzing the process parameters of slub yarn, first obtain the slub yarn based on the fabric, and then determine whether the fabric effect is consistent with the sample through trial spinning and weaving. The whole analysis process is too cumbersome, inefficient, and there are measurement The disadvantages of low precision, time-consuming and labor-intensive. Therefore, there is an urgent need for a method that can effectively detect the process parameters of cloth slub yarn.

Contents of the invention

The object of the present invention is to provide a kind of semi-automatic identification method that detects cloth surface slub yarn process parameter, the technical scheme that adopts is as follows:

Step 1: Obtain the grayscale image of the woven fabric with digital image acquisition equipment, which includes scanners, video microscopes, line scan cameras, area scan cameras, etc.

Step 2: Rotate the collected image, using -t° as the starting point, m° as the step size, and t° as the end point to rotate the image step by step, based on the standard deviation of the average value of each column or row of each rotated image Determine the angle to be rotated, the parameter t takes a value between 10 and 20, and the value of m is 0.5 to 1.

Step 3: Splicing the multiple yarn images obtained in step 2, matching by calculating the matrix similarity of the overlapping parts in the two images, selecting the overlapping part in one image, and using the second part of the same position Slide to select and compare with the first one, the one with the greatest similarity is the position to be spliced.

Step 4: Use image processing software to mark and position the spliced slub yarn fabric images, connect adjacent slubs, and automatically record the coordinates of the starting and ending points of the connected slubs.

Step 5: Using the recorded starting position of each segment of slub yarn, identify the required slub parameters according to the following calculation methods of slub length, slub spacing and slub period:

(1) Calculation method of bamboo joint length

Because each slub yarn segment can be described by four parameters: base yarn diameter, slub diameter, slub spacing, and slub length. Therefore, the starting point of the slub length can be understood as the place where the base yarn becomes thicker, and the end point is the place where the slub turns into the base yarn. And because the coordinates of the starting point and end point of the bamboo joints have been stored when marking the bamboo joints, when detecting the length of the latitudinal bamboo joints, the length of the bamboo joints can be obtained by simply subtracting the recorded ordinate values. Suppose the coordinate points A(x1, y1) and B(x1, y2) of the bamboo joint AB, then the length of the bamboo joint L _AB =y2-y1, and so on.

(2) Calculation method of bamboo joint spacing

The slub pitch is the base yarn length between two adjacent slubs. When detecting the slub spacing on the fabric, the proportion relationship between ordinary yarn and slub yarn should be considered. If there is no ordinary yarn interval between slub yarns, it is a single slub yarn fabric; if there is an interval, the interval should be ignored. It is considered that the adjacent slub yarns are connected with each other.

① Calculation of slub spacing in weft slub yarn fabric

The weft insertion length of the weft direction slub yarn fabric is different due to the different weft insertion methods. The shuttle weft insertion method is characterized by reciprocation, so that the arrangement of the slubs in the cloth surface is arranged in a circular turn-back order; the shuttleless weft insertion method will cut the weft yarn at the end of the yarn every time it is introduced, because the slub yarns are arranged sequentially after cutting, The weft insertion length is equal to the sum of the width of the fabric reed width and the lengths of the raw edges and waste edges on both sides, and the weft insertion length of the shuttle weft insertion method is the width of the fabric reed width. Let the coordinate point C of the slub CD adjacent to the slub AB be (x2,y3), B(x2,y4).

When the weft insertion method is shuttle insertion, the calculation of the slub spacing has two situations: if the weft yarn is introduced from the left first, the length of the base yarn between the two slubs can be calculated by "2×width-y4-y2 " estimate; if the weft yarn is first introduced from the right side, the length of the base yarn between the two slubs can be estimated by "y1+y3".

When the weft insertion method is shuttleless weft insertion, the weft yarn is generally introduced from the left side at this time, ignoring the influence of burrs and waste edges, the length of the base yarn between two slubs can be estimated by "width-y4+y1".

②Calculation of slub spacing in warp slub yarn fabric

When detecting the slub spacing of the warp-woven slub yarn, it is only necessary to subtract the coordinates of the starting point of the adjacent slub on the same warp from the coordinate of the ending point of the previous slub to obtain the slub spacing.

(3) Calculation method of bamboo period

When detecting the bamboo joint cycle, the bamboo joint types are classified according to the calculated bamboo joint length and bamboo joint spacing, and the length of the bamboo joint cycle belonging to the same type is calculated.

The invention overcomes the deficiency of the existing manual detection method, improves the detection accuracy of the slub yarn in the fabric, liberates productivity at the same time, and adapts to modern textile automatic production.

Description of drawings

Fig. 1 is a flow chart of the semi-automatic identification method for slub yarn process parameters based on slub yarn fabrics.

Fig. 2 The original picture of weft slub yarn fabric.

Figure 3 Rotated image.

Figure 4 The image of the slub fabric after splicing.

Figure 5. Bamboo image after image processing software marking and connection.

Detailed ways

Embodiments of the present invention will be described in detail below in conjunction with technical solutions and accompanying drawings.

This specific implementation case is described by taking the weft insertion on the right side of the weft slub yarn fabric as an example. The identification flow chart is shown in Figure 1. The specific implementation steps include the following:

Step 1: Use a certain image acquisition device to collect the image of the surface of the slub yarn fabric, and make the fabric as straight as possible during the collection process. Figure 2 is an image of the weft direction slub yarn fabric collected by a scanner.

Step 2: Rotate the collected fabric image, using -10° as the starting point, 0.5° as the step size, and 10° as the end point to step and rotate the image, and determine the required value according to the standard deviation of the average value of each column of each rotated image. The angle of rotation, the rotated image is shown in Figure 3.

Step 2: Splicing the multiple yarn images obtained in step 2, matching by calculating the matrix similarity of the overlapping parts in the two images, selecting the overlapping part in one image, and using the part of the same position in the second image Slide to select and compare with the first one, the one with the greatest similarity is the position to be spliced. The slub fabric image spliced by this method is shown in Figure 4.

Step 4: Use Photoshop CS6 image processing software to open the stitched image of the spliced slub yarn fabric, zoom in and mark and position the slub yarn, and connect adjacent slubs, and automatically record the connected according to the software The position coordinates of the starting point and the ending point of the bamboo joints, as shown in Figure 5, are marked and connected bamboo joints by the white horizontal bars.

Step 5: Utilize the starting position of each section of slub yarn recorded and the calculation method of slub length, slub spacing, and slub period to identify the specific data of these parameters:

Bamboo length L _AB =y2-y1, L _CD =y4-y3;

The embodiment is weft insertion on the right side of the slub yarn fabric in the weft direction, and the slub spacing between the slubs AB and CD is y1+y3;

Classification and statistics are carried out according to the lengths and spacings of all slubs on the obtained fabric, and finally the cycle of slubs is obtained.

Claims (8)

1. a kind of semi-automatic recognition methods of necked yarn process parameter based on bunchy yarn fabrics, which is characterized in that including

The gray level image of ring woven fabric is obtained using digital image acquisition apparatus；

The rotation of the gray level image of ring woven fabric；

The splicing of the gray level image of ring woven fabric；

The label connection of ring based on human-computer interaction and automatically recording for coordinate；

The identification and analysis to nubby-yarn parameter are realized according to nubby-yarn parameter computational methods；

The rotation of the gray level image of the ring woven fabric is used with-t ° for starting point, and m ° is step-length, and t ° revolves for terminal stepping Turn image, obtains several textile images, the angle of final rotation is according to the average value of rotation image each column or row every time Standard deviation determines.

2. the semi-automatic recognition methods of the necked yarn process parameter according to claim 1 based on bunchy yarn fabrics, feature It is,

The splicing of the gray level image of the ring woven fabric is the phase by calculating the matrix of intersection in two width yarn images It is matched like property, chooses the intersection in piece image, selection region is slided using the part of the second width same position Matrix, and be compared with the first width, similarity is maximum, is the position to be spliced.

3. the semi-automatic recognition methods of the necked yarn process parameter according to claim 1 or 2 based on bunchy yarn fabrics, special Sign is,

The label connection of the ring based on human-computer interaction and automatically recording for coordinate will be spliced using image processing software The ring position in bunchy yarn fabrics image afterwards is marked and positions, and is then attached adjacent ring, and automatic Record has connected the starting point and ending point position coordinates of ring.

4. the semi-automatic recognition methods of the necked yarn process parameter according to claim 1 or 2 based on bunchy yarn fabrics, special Sign is,

The nubby-yarn parameter computational methods include slub length, ring spacing and ring cycle parameter computational methods；

Slub length starting point is that base yarn starts thicker place, and terminal is then the place that ring switchs to base yarn；Detect broadwise ring When length, the ordinate value of record subtracts each other to obtain slub length；

Ring spacing is exactly the base yarn length between adjacent two ring；According to the proportion relation identification between common yarn and slub Ring spacing, when between slub without being then single bunchy yarn fabrics when common yarn interval；When there is interval, then ignore interval Common yarn, it is believed that linked up between adjacent slub；The ring spacing of broadwise bunchy yarn fabrics should be according to wefting insertion Mode is calculated；

When detecting the ring period, classified to ring type according to the slub length of calculating and ring spacing, it will be affiliated same The ring cycle length of type calculates.

5. the semi-automatic recognition methods of the necked yarn process parameter according to claim 3 based on bunchy yarn fabrics, feature It is,

The nubby-yarn parameter computational methods include slub length, ring spacing and ring cycle parameter computational methods；

Slub length starting point is that base yarn starts thicker place, and terminal is then the place that ring switchs to base yarn；Detect broadwise ring When length, the ordinate value of record subtracts each other to obtain slub length；

Ring spacing is exactly the base yarn length between adjacent two ring；According to the proportion relation identification between common yarn and slub Ring spacing, when between slub without being then single bunchy yarn fabrics when common yarn interval；When there is interval, then ignore interval Common yarn, it is believed that linked up between adjacent slub；The ring spacing of broadwise bunchy yarn fabrics should be according to wefting insertion Mode is calculated；

When detecting the ring period, classified to ring type according to the slub length of calculating and ring spacing, it will be affiliated same The ring cycle length of type calculates.

6. the semi-automatic recognition methods of the necked yarn process parameter based on bunchy yarn fabrics according to claims 1 or 2 or 5, It is characterized in that, the utilization digital image acquisition apparatus includes scanner, videomicroscopy, line-scan digital camera or area array cameras.

7. the semi-automatic recognition methods of the necked yarn process parameter according to claim 3 based on bunchy yarn fabrics, feature It is, the utilization digital image acquisition apparatus includes scanner, videomicroscopy, line-scan digital camera or area array cameras.

8. the semi-automatic recognition methods of the necked yarn process parameter according to claim 4 based on bunchy yarn fabrics, feature It is, the utilization digital image acquisition apparatus includes scanner, videomicroscopy, line-scan digital camera or area array cameras.