CN114717832B - Rapid detection method for broken needle for spinning - Google Patents
Rapid detection method for broken needle for spinning Download PDFInfo
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- CN114717832B CN114717832B CN202210405786.XA CN202210405786A CN114717832B CN 114717832 B CN114717832 B CN 114717832B CN 202210405786 A CN202210405786 A CN 202210405786A CN 114717832 B CN114717832 B CN 114717832B
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- needling
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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
- D06H3/14—Detecting and removing metal particles, e.g. broken needles, or card clothing, from fabrics
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/30—Computing systems specially adapted for manufacturing
Abstract
The utility model relates to the technical field of spinning, in particular to a rapid detection method for broken needles for spinning. The method specifically comprises the following steps: (1) Before needling production, needling a blank sample by a needle plate to obtain a standard sample, and then carrying out digital image processing on a needle hole of the standard sample and establishing a coordinate system; (2) After needling production for a plurality of hours, taking another blank sample, needling the blank sample by a needle plate to obtain a comparison sample, extracting and identifying images of pinholes on the comparison sample by adopting a digital image processing technology, and establishing a coordinate system; (3) Comparing the established coordinate systems, if the results are different, finding out the corresponding position of the needle plate to replace broken needles; if the results are the same, the replacement is not needed; and (4) repeating the steps (2) and (3) in the subsequent production. The utility model can rapidly and accurately detect the broken needle and the position thereof without increasing the burden of the existing equipment, and is applicable to fiber fabrics made of various materials.
Description
Technical Field
The utility model relates to the technical field of textile technology, in particular to a rapid detection method for broken needles for textile.
Background
In the running process of the textile machine, when the textile needle is used for a certain time or encounters a harder substance, the phenomenon of needle breakage occurs, and if the needle breakage is not replaced in time, the textile effect and quality can be affected. Therefore, the monitoring of the running knitting needles, namely the broken needle detection, is an indispensable important component part, and has a vital effect on improving the quality of products and reducing bad and defective products.
The utility model patent of application number 202021955530.9 discloses broken needle detection equipment for textile machinery processing, utilizes the tight force extrusion compression spring of textile thread during operation, and the mutual cooperation between pressure sensor, control panel and the warning light can be through pressing pressure sensor, reaches the effect of real-time supervision broken needle, and when pressure sensor's pressure coefficient suddenly reduces, the warning light lights, reaches the purpose of detection. However, it is known to those skilled in the art that the needle is oscillated up and down by the needle plate during the needling process, and the force generated by the needling after the needle is broken is slightly changed, so that the small change of the force is disturbed by the oscillation during the reciprocation process, which makes it difficult to accurately monitor the pressure sensor.
The patent application number 201710036716.0 discloses a method for detecting a defective needle defect of a large circular knitting machine, which is characterized in that a machine learning method is utilized to detect the defective needle defect of a fabric, a self-adaptive image enhancement technology is utilized to preprocess a defective image, an interested region is effectively segmented, and the characteristic information of the fabric blemish is effectively extracted according to a multi-scale pyramid method with consistent phase; in the aspect of classification and identification of fabric flaw points, fabric needle faults are successfully detected by utilizing hypergraph regularization attribute learning. However, this method is not suitable for carbon fiber fabrics, and it is known by those skilled in the art that carbon fibers are black, so that the whole fabric made of carbon fibers is black, and even if an image is enhanced by an image acquisition system, it is difficult to distinguish defective areas, and even if the image is enhanced, the defective areas of the carbon fiber fabrics change correspondingly with time in the needling process, so that it is difficult to reduce the characteristic information of the extracted fabric blemishes, and thus detect broken needles.
Based on this, it is necessary to provide a new rapid detection method for broken needles for spinning through research.
Disclosure of Invention
The utility model aims to provide a rapid detection method of broken needles for spinning, which can rapidly and accurately detect broken needles and the positions of the broken needles without increasing the burden of the existing equipment and is applicable to fiber fabrics made of various materials.
In order to achieve the above object, the present utility model provides the following technical solutions:
the utility model provides a rapid detection method of broken needles for spinning, which comprises the following steps:
(1) Before needling production, needling a blank sample by using a needle plate, taking the needled blank sample as a standard sample, extracting and identifying a pinhole on the standard sample by using a digital image processing technology, and establishing a coordinate system;
(2) After needling production for a plurality of hours, taking another blank sample, needling the blank sample by a needle plate to obtain a comparison sample, extracting and identifying images of pinholes on the comparison sample by adopting a digital image processing technology, and establishing a coordinate system;
(3) Comparing the coordinate systems established in the steps (1) and (2), if the obtained results are different, the difference is that the broken needle is located, and then the position corresponding to the needle plate is found for broken needle replacement; if the results are the same, the replacement is not needed;
(4) In the subsequent production, the steps (2) and (3) are repeated for the broken needle monitoring and replacement.
Furthermore, the needle mounting surface of the needle plate is provided with longitudinal and transverse coordinate axis scale marks according to the rows and columns where the mounting holes are located.
Further, the blank sample piece has a shape consistent with the shape of the needle plate.
Further, the needling surface of the blank sample corresponds to the size of the mounting surface of the needle plate.
Further, the blank sample is light in color; preferably white, tin white, goose yellow, light pink, fruit green, pink green, light blue and light purple; further preferably white, tin white, goose yellow, pale pink, greenish-fruit, pink green; more preferably white.
Further, the blank sample piece is made of one of aluminum foil paper, matte paper, paperboard, coated paper, ballast paper, offset paper, paperboard and photographic paper.
Further, the needling depth of the step (1) and the step (2) is 0.8-1.2 mm; preferably 1mm.
Further, the needling depth of the step (1) is the same as that of the step (2).
Further, the number of hours in the step (2) is 50-300 h.
Further, the method for extracting and identifying the image by adopting the digital image processing technology in the steps (1) and (2) is as follows: journal, "sensor and microsystems" 2009, "digital image processing technology-based rapid detection System for micro group holes," volume 28, 6, 73-79 pages.
The utility model also provides an application of the rapid detection method of the broken needle for spinning in the needling process of the carbon fiber fabric. Wherein the surface density of the carbon fiber fabric is 15-500 g/m 2 。
Compared with the prior art, the utility model has the following beneficial effects:
1. the method for establishing the coordinate system by combining the blank sample with the digital image processing technology is used for detecting the broken needle of the loom, is simple, quick, accurate and reliable, and avoids the problem that the detection results are unreliable due to various external factors in pressure sensing detection and direct image scanning detection;
2. the detection method does not need to carry out any precise reconstruction on the existing equipment, greatly saves the equipment reconstruction and subsequent maintenance cost, and improves the economic benefit;
3. the detection method of the utility model has no limitation on the material and the color of the product, and can be widely applied to fiber fabrics with various materials.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a needle board mounting surface;
FIG. 2 is a graph of the standard sample and the comparison sample of example 1, wherein graph (a) is a graph of the standard sample and graph (b) is a graph of the comparison sample;
FIG. 3 is a graph of the standard sample and the comparison sample of example 2, wherein graph (a) is a graph of the standard sample and graph (b) is a graph of the comparison sample;
fig. 4 is a graph of the standard sample and the comparison sample of example 3, wherein fig. (a) is a graph of the standard sample and fig. (b) is a graph of the comparison sample.
Detailed Description
When the needling process is performed, a broken needle phenomenon often occurs, and a skilled technician generally stops the needling machine after a certain frequency of use of the needling needles, touches the penetration section of each needling needle to perform damage judgment on the needling needles, so that the broken needle is replaced. It is known to those skilled in the art that the needle board of a loom is equipped with a large number of needles, and that the touch detection of each is not safe nor efficient and requires a certain experience of the operator. The improvement design of the detection equipment based on the original equipment greatly improves the production cost, has limited applicability and is not beneficial to sustainable production application.
Based on the fact that the breaking of the needle usually occurs at 1-5 mm of the needle tip during the production process, the position of the broken needle can be judged by detecting the change of the needle hole formed in the fabric when the needle penetrates the fabric by about 1mm before and after the breaking of the needle. However, direct image scanning and collection of pinholes on fabrics is very demanding for the materials and colors of the fabrics, and fabrics such as carbon fiber fabrics which are black and whose pinholes are easily deformed over time are completely unsuitable.
Therefore, the application discloses a method for performing contrast monitoring through blank samples, which comprises the following specific steps:
(1) Before needling production, needling a blank sample by using a needle plate, wherein the needling depth is 0.8-1.2 mm, taking the needled blank sample as a standard sample, extracting and identifying images of pinholes on the standard sample by using a digital image processing technology, and establishing a coordinate system;
(2) After needling production for a plurality of hours, taking another blank sample, needling the blank sample by a needle plate to obtain a comparison sample, extracting and identifying images of pinholes on the comparison sample by adopting a digital image processing technology, and establishing a coordinate system;
(3) Comparing the coordinate systems established in the steps (1) and (2), if the obtained results are different, the difference is that the broken needle is located, and then the position corresponding to the needle plate is found for broken needle replacement; if the results are the same, the replacement is not needed;
(4) In the subsequent production, the steps (2) and (3) are repeated for the broken needle monitoring and replacement.
Further, in order to find the position of the broken needle on the needle plate more quickly, the needle mounting surface of the needle plate is provided with the scale marks of the longitudinal and transverse coordinate axes according to the rows and columns where the mounting holes are located, as shown in fig. 1.
In the present utility model, the blank sample is shaped to conform to the shape of the needle plate.
In the utility model, the needling surface of the blank sample is consistent with the size of the mounting surface of the needle plate.
In the utility model, the blank sample is light in color; preferably white, tin white, goose yellow, light pink, fruit green, pink green, light blue and light purple; further preferably white, tin white, goose yellow, pale pink, greenish-fruit, pink green; more preferably white.
In the utility model, the blank sample piece is made of a material with stable aperture after needling, and the blank sample piece is made of one of aluminum foil paper, matte paper, paperboard, coated paper, woodboard paper, offset paper, paperboard and photographic paper; preferably one of aluminum foil paper, matte paper, paperboard, coated paper, ballast paper and offset paper; further preferred is aluminum foil paper.
In the utility model, the needling depth of the step (1) and the step (2) is preferably 0.9-1.1 mm; further preferably 1mm.
In the utility model, the needling depth of the step (1) is the same as that of the step (2).
In the utility model, the number of hours in the step (2) is 50-300 h.
In the utility model, the method for extracting and identifying the image by adopting the digital image processing technology is disclosed in Zhang Jianjian and the like published in a fast detection system for micro group holes based on the digital image processing technology, namely, a sensor and micro system, which is 24 th edition, 6 th edition, 73-79 pages in 2009.
The technical solutions provided by the present utility model are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present utility model. The embodiments of the utility model are all that the surface density is 15-500 g/m 2 Is implemented for needling a production object.
Example 1
A rapid detection method of broken needles for spinning comprises the following steps:
(1) Preparing two blank sample pieces, wherein the two blank sample pieces are white board paper, and the shape of the blank sample pieces is consistent with that of a needle plate;
(2) Before needling production, a blank sample is needled by using a needle plate, the needling depth is 0.8mm, the needled blank sample is used as a standard sample, the needle hole on the standard sample is subjected to image extraction and identification by adopting a digital image processing technology, and a coordinate system shown in fig. 2 (a) is established;
(3) At an areal density of 500g/m 2 After 50 hours of needling production of the carbon fiber fabric, taking another blank sample, performing needling treatment on the blank sample by referring to the method in the step (1), wherein the needling depth is 0.8mm, obtaining a comparison sample, performing image extraction and identification on pinholes on the comparison sample by adopting a digital image processing technology, and establishing a coordinate system shown in the figure 2 (b);
(4) As can be seen from comparing fig. 2 (a) with fig. 2 (b), the positions of the comparison sample pieces in the coordinate axes (2, 7), (2, 8), (9, 4), (9, 5), (10, 4), (10, 5), (21, 6) have no holes the same as those of the standard sample pieces, which indicates that the broken needle is generated at the positions, and the broken needle can be replaced only by finding the corresponding positions of the needle plate.
Example 2
A rapid detection method of broken needles for spinning comprises the following steps:
(1) Preparing two blank sample pieces, wherein the two blank sample pieces are aluminum foil paper, and the shape of the blank sample pieces is consistent with that of a needle plate; the needle mounting surface of the needle plate is arranged in a three-coordinate mode according to the mounting holes;
(2) Before needling production, a blank sample is taken and needled by using a needle plate, the needling depth is 1mm, the needled blank sample is used as a standard sample, the needle hole on the standard sample is subjected to image extraction and identification by adopting a digital image processing technology, and a coordinate system shown in fig. 3 (a) is established;
(3) At an areal density of 200g/m 2 After 200 hours of needling production of the carbon fiber fabric, taking another blank sample, and performing needling treatment on the blank sample by referring to the method in the step (1), wherein the needling depth is 1mm, obtaining a comparison sample, extracting and identifying images of pinholes on the comparison sample by adopting a digital image processing technology, and establishing a coordinate system shown in fig. 3 (b);
(4) As can be seen from comparing fig. 3 (a) with fig. 2 (b), the positions of the comparison sample pieces in the coordinate axes (2, 3), (2, 4), (2, 7), (7, 4), (8, 7), (10, 1), (12, 8), (14, 4) have no holes the same as those of the standard sample pieces, which indicates that the broken needle is generated at the positions, and the broken needle can be replaced only by finding the corresponding positions of the needle plate.
Example 3
A rapid detection method of broken needles for spinning comprises the following steps:
(1) Preparing two blank sample pieces which are of goose-yellow ballast paper and have the same shape as the needle plate; the needle mounting surface of the needle plate is arranged in a three-coordinate mode according to the mounting holes;
(2) Before needling production, a blank sample is taken and needled by using a needle plate, the needling depth is 1.2mm, the needled blank sample is used as a standard sample, the needle hole on the standard sample is subjected to image extraction and identification by adopting a digital image processing technology, and a coordinate system shown in fig. 4 (a) is established;
(3) At an areal density of 15g/m 2 After the carbon fiber fabric is needled and produced for 300 hours, taking another blank sample, performing needling treatment on the blank sample by referring to the method in the step (1), wherein the needling depth is 1.2mm, obtaining a comparison sample, performing image extraction and identification on pinholes on the comparison sample by adopting a digital image processing technology, and establishing a coordinate system shown in fig. 4 (b);
(4) Comparing fig. 4 (a) with fig. 4 (b), it can be seen that the positions of the comparison sample pieces in the coordinate axes (3, 2), (6, 6), (12, 5) do not have holes the same as those of the standard sample pieces, which indicates that broken needles are generated at the positions, and the broken needles can be replaced only by finding the corresponding positions of the needle plate.
The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.
Claims (7)
1. The rapid detection method of broken needles for spinning carbon fiber fabrics is characterized by comprising the following steps:
(1) Before needling production, needling a blank sample by using a needle plate, taking the needled blank sample as a standard sample, extracting and identifying a pinhole on the standard sample by using a digital image processing technology, and establishing a coordinate system;
(2) After needling production for a plurality of hours, taking another blank sample, needling the blank sample by a needle plate to obtain a comparison sample, extracting and identifying images of pinholes on the comparison sample by adopting a digital image processing technology, and establishing a coordinate system;
(3) Comparing the coordinate systems established in the steps (1) and (2), if the obtained results are different, the difference is that the broken needle is located, and then the position corresponding to the needle plate is found for broken needle replacement; if the results are the same, the replacement is not needed;
(4) In the subsequent production, repeating the steps (2) and (3) for broken needle monitoring and replacement;
the needle mounting surface of the needle plate is provided with longitudinal and transverse coordinate axis scale marks according to rows and columns where the mounting holes are located;
the color of the blank sample piece is light; the blank sample piece is made of one of aluminum foil paper, matte paper, paperboard, coated paper, ballast paper, offset paper, paperboard and photographic paper;
the needling depth of the step (1) and the step (2) is 0.8-1.2 mm.
2. The method for rapidly detecting broken needles for textile of carbon fiber fabrics according to claim 1, wherein the blank sample is in a shape consistent with the shape of the needle plate.
3. The method for rapidly detecting broken needles for textile use of carbon fiber fabrics according to claim 1 or 2, wherein the needling surface of the blank sample corresponds to the size of the installation surface of the needle plate.
4. The method for rapidly detecting broken needles for textile of carbon fiber fabrics according to claim 1, wherein the needling depth of the step (1) is the same as that of the step (2).
5. The rapid detection method of broken needles for textile of carbon fiber fabric according to claim 1, wherein the number of hours in the step (2) is 50-300 h.
6. The use of a rapid detection method for broken needles for carbon fiber fabric spinning according to any of claims 1 to 5 in the carbon fiber fabric spinning process.
7. The application of the rapid detection method for broken needles for carbon fiber fabric spinning according to claim 6 in the needling process of carbon fiber fabric, wherein the surface density of the carbon fiber fabric is 15-500 g/m 2 。
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