Cloth flaw detection method and cloth paving machine with flaw recognition and positioning functions

Abstract

The invention belongs to the technical field of intelligent cutting, and relates to a cloth flaw detection method, which comprises the following steps: 1, marking flaws: in the process of inspecting cloth by using a cloth inspecting machine, detecting cloth flaws, and setting flaw marks at the positions of flaw points, the flaw marks and the corresponding flaw points have the same X-axis coordinates, and the flaws are marked as flaws; flaw marks corresponding to different flaw spots have the same Y-axis coordinate; 2, identifying the mark: identifying the defect mark set in the step 1 through a defect mark identifier in the process of paving the cloth by using the cloth paving machine, and recording an X-axis coordinate corresponding to the defect mark or placing an X-axis marking strip at the position of the defect mark; the flaw mark is arranged through a one-dimensional code or a two-dimensional code, and the flaw mark recognizer is a code reader or a camera capable of recognizing the one-dimensional code or the two-dimensional code. According to the cloth defect detection method and the cloth paving machine with defect identification and positioning, defect spots on the cloth can be accurately and quickly detected.

Description

Technical Field

[0001] The present invention belongs to the technical field of intelligent cutting and relates to a cloth defect detection method and a cloth spreading machine with defect recognition and positioning capabilities. Background Art

[0002] The fabric inspection machine inspects the fabric. After the inspection is completed, the spreading machine compares the defect points with the layout during the spreading process. This process requires positioning the defect points to facilitate inspection after the fabric is cut, so as to reduce the number of inspection workers and improve inspection efficiency.

[0003] During the fabric inspection process, due to the influence of many factors (the fabric has a certain elasticity, which will produce an unquantifiable extension in the X-axis direction when spreading; the fabric needs to be cut with a cutter when spreading to both ends, but the margin generated by cutting is also difficult to determine), the coordinates of the defect points detected during the fabric inspection cannot be accurately determined on the X-axis. Therefore, the defect points need to be rescanned during the fabric laying to determine their exact location.

[0004] Chinese invention patent application CN119379980A (publication date: January 28, 2025) discloses a method for intelligently locating defective pieces. The method comprises projecting an electronic marker onto the surface of a cloth-pulling machine; identifying defects in the cloth during the pulling process to obtain the defective points and information about the defective fabric pieces; laminating the surface of the stretched cloth with a film, printing the electronic marker image on the film according to the size of the marker image to obtain a laminated marker image, and simultaneously printing relevant information about each piece and the defective fabric piece information on the corresponding laminated piece surface; cutting the cloth according to the shapes of the laminated pieces in the laminated marker image to obtain groups of fabric pieces, and determining the location of the defective fabric pieces within each group of fabric pieces based on the defective fabric piece information recorded on the laminated piece surface. This method can quickly locate defective pieces in each group of fabric pieces, improving the efficiency of finding defective pieces.

[0005] The above-mentioned intelligent defect location method projects an electronic marker image, then uses a camera to continuously capture the entire fabric, and finally compares and identifies the defect points. During the spreading process, the fabric is constantly moving rapidly, and during this rapid movement, the image recognition device has a very low recognition rate for defects, making it difficult to accurately locate the defect points. Summary of the Invention

[0006] In view of the deficiencies of the prior art, the present invention provides a cloth defect detection method and a cloth spreading machine with a defect recognition system, which can accurately and quickly detect defect points on the cloth, thereby reducing the number of inspection pieces and improving the inspection efficiency.

[0007] In order to solve the above technical problems, the purpose of the present invention is achieved through the following technical solutions:

[0008] A method for detecting fabric defects comprises the following steps:

[0009] 1. Marking defects: During the inspection process using a fabric inspection machine, fabric defects are detected and a defect mark is set at the defect point. The defect mark and the corresponding defect point have the same X-axis coordinate, and the defect marks corresponding to different defect points have the same Y-axis coordinate;

[0010] 2. Identification mark: When using the spreading machine to spread the cloth, the defect mark set in step 1 is identified by the defect mark identifier, and the X-axis coordinate corresponding to the defect mark is recorded or an X-axis marking strip is placed at the location of the defect mark;

[0011] The defect mark is set by a one-dimensional code or a two-dimensional code, and the defect mark identifier is a code reader or a camera that can recognize a one-dimensional code or a two-dimensional code.

[0012] In the present invention, the one-dimensional code (also called barcode) includes marks set by various code systems, such as: Code39 code (standard 39 code), Codabar code, Code25 code (standard 25 code), ITF25 code (interleaved 25 code), Matrix25 code (matrix 25 code), UPC-A code, UPC-E code, EAN-13 code (EAN-13 international commodity barcode), EAN-8 code (EAN-8 international commodity barcode), Code-A / B / C code, MSI code, Code11 code, Code93 code, ISBN code, ISSN code, Code128 code (Code128 code, including EAN128 code), etc.

[0013] In the present invention, the two-dimensional code includes marks set by various code systems, such as: standard QR code, MicroQR Code (micro QR code), PDF417 code, PDF417 Truncated code (PDF417 truncated code), MicroPDF417 (micro PDF417 code), Han Xin code, Data Matrix (DM code), Aztec code, Code49 code, Code 16k code, CodablockF code, Data MatxiCode code, etc.

[0014] In the above-mentioned method for detecting fabric defects, the defect mark is set at the edge of the fabric, the defect mark identifier is set above the corresponding position of the defect mark, and the defect mark identifier scans the corresponding area directly below it. The defect mark set at the edge of the fabric and the defect mark identifier scanning directly below can facilitate the scanning of the defect mark and improve its recognition rate.

[0015] In the above-mentioned fabric defect detection method, in step 2, the defect mark identifier is connected to an audible and visual alarm device, and after the defect mark identifier detects the defect mark, the audible and visual alarm device sounds an alarm; the audible and visual alarm device can be replaced by other alarm devices.

[0016] In the above-mentioned fabric defect detection method, the fabric inspection machine is a manual fabric inspection machine. In step one, fabric defects are identified by human visual recognition, and defect marks are manually pasted at the locations corresponding to the defect points. In step two, an X-axis marking strip is manually placed, and the X-axis marking strip extends to the outside of the fabric. Preferably, the X-axis marking strip is a strip of fabric of a different color from the fabric.

[0017] In the above-mentioned fabric defect detection method, the fabric inspection machine is an automatic fabric inspection machine. During the fabric inspection process in step one, a defect mark is automatically sprayed or pasted, and the defect mark records the Y-axis coordinate information of the defect point. During the recognition process in step two, the defect mark identifier automatically records the layer number information and X-axis coordinate information of the defect point when recognizing the defect mark.

[0018] The present invention also provides a spreading machine with defect recognition and positioning, comprising a spreading table and a host mechanism, wherein a cloth with a defect mark is spread on the spreading table, and the defect mark is a one-dimensional code or a two-dimensional code with the same Y-axis coordinate. The host mechanism is slidably arranged on the spreading table along the X-axis direction, and a lifting assembly is provided on the front side of the host mechanism, and the lifting assembly is connected to a cutter head assembly. A code reader that can identify defect marks is installed on the cutter head assembly, and the Y-axis coordinate of the code reader is consistent with the defect mark; the code reader can also be other devices that can identify one-dimensional codes or two-dimensional codes.

[0019] In the above-mentioned spreading machine with defect recognition and positioning, the code reader is fixed to the cover of the cutter head assembly through a bracket, and the bracket includes a vertical section, a horizontal section, an extension section and a mounting section arranged accordingly, the vertical section is in contact with and fixedly connected to the rear side of the cover, and the vertical section is located on the outside of the cutter arm, the horizontal section is inclined forward from the outside to the inside, and the extension section extends obliquely upward from the outside to the inside, the mounting section is horizontally distributed, and the bottom of the mounting section is installed facing the set code reader; further, a vertical adjustment slot in the vertical direction is provided on the vertical section, and a Y-axis adjustment slot along the Y-axis direction is provided on the mounting section, the vertical adjustment slot can adjust the height of the code reader, and the Y-axis adjustment slot can adjust the Y-axis position of the code reader.

[0020] In the above-mentioned spreading machine with defect recognition and positioning, an opposite-edge photoelectric sensor is provided on one side of the host mechanism, and the code reader is provided in the same Y-axis coordinate area as the sensing area of ​​the opposite-edge photoelectric sensor.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention provides a method for detecting fabric defects. During the fabric inspection phase, a one-dimensional or two-dimensional code is placed at the defect point detected. During the fabric spreading phase, the defect point can be located by scanning the one-dimensional or two-dimensional code, thereby identifying the defect point and facilitating fabric inspection. The present invention also places the defect marks on the same Y-axis coordinate, greatly facilitating identification by a defect mark identifier. The present invention eliminates the need for an image recognition system to re-identify the defect point; instead, the fabric spreading machine can locate the defect point using only high-speed recognition of the two-dimensional code. Compared to traditional image recognition systems, the present invention utilizes two-dimensional or one-dimensional codes to improve the detection rate of defect point location.

[0023] 2. The present invention is well suited for manual fabric inspection machines. During the inspection phase, labels with QR or 1D codes can be manually affixed. During the spreading phase, a code reader (camera) scans the defect mark and then manually places a marking strip, thereby accurately identifying the defect point. During the inspection phase, the corresponding layer number and position can be accurately located. Therefore, the present invention can well meet the defect identification needs of manual fabric inspection machines and expand their scope of application.

[0024] 3. The present invention is well suited for automatic fabric inspection machines, enabling automatic identification and marking of defects: Defects are automatically identified during the inspection phase and then automatically marked with a one-dimensional or two-dimensional code. During the inspection process, a code reader (camera) scans the defect mark and automatically records its location information, thereby achieving fully automatic identification of defects. The present invention records the Y-axis coordinate information of the defect during the inspection process and the number of layers and X-axis coordinate information of the defect during the spreading phase, improving the accuracy of the recorded defect location information.

[0025] 4. The present invention also provides a spreading machine with defect recognition and positioning to meet the implementation requirements of the fabric defect detection method of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a perspective view of embodiment 3 of the present invention;

[0027] Figure 2 is a schematic diagram of setting a defect mark according to the present invention;

[0028] Figure 3 yes Figure 1 A partial enlarged view of

[0029] Figure 4 is a perspective view of a bracket according to Example 3 of the present invention;

[0030] Figure numerals: 1. spreading table; 2. main machine mechanism; 3. lifting assembly; 4. cutter head assembly; 5. code reader; 6. bracket; 6a. vertical section; 6b. horizontal section; 6c. extension section; 6d. mounting section; 7. cover; 8. cutter arm; 9. edge photoelectric sensor; 10. fabric; 11. defect mark. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to specific embodiments of the present invention. Figure 1-4 :

[0032] Example 1

[0033] Fabric defect detection method equipped with a manual fabric inspection machine

[0034] The cloth defect detection method comprises the following steps:

[0035] 1. Marking defects: When inspecting fabric using a fabric inspection machine, fabric defects are detected and a defect mark is set at the location of the defect point. The defect mark has the same X-axis coordinate as the corresponding defect point, and the defect marks corresponding to different defect points have the same Y-axis coordinate. Specifically, when manually operating the fabric inspection machine, the operator identifies the defect point on the fabric surface with the naked eye and uses a pre-printed one-dimensional or two-dimensional code label to manually stick it at the specified defect mark location, such as on the same X-axis as the defect point and 10 mm away from the edge of the fabric to ensure the continuity of subsequent scans. The one-dimensional or two-dimensional code contains basic information about the fabric (such as batch) and the serial number of the defect mark. It can also optionally include other information such as the defect type code.

[0036] 2. Identification mark: When using a spreading machine to spread cloth, the defect mark set in step one is identified by the defect mark identifier, and the X-axis coordinate corresponding to the defect mark is recorded or an X-axis marking strip is placed at the location of the defect mark; specifically, when the main mechanism of the spreading machine moves along the X-axis to spread the cloth, the code reader installed on the cutter head assembly synchronously scans the edge of the cloth. When the code reader recognizes the label, it prompts the operator through an audible and visual alarm. The operator manually places an X-axis marking strip that is different from the color of the cloth on the cloth surface corresponding to the label, and extends it to the outside of the cloth edge for subsequent identification during inspection. Since the X-axis marking strip that is easy to identify is placed, the layer number and X-axis coordinate position corresponding to the defect point can be easily found during inspection.

[0037] Example 2

[0038] Fabric defect detection method equipped with automatic fabric inspection machine

[0039] The cloth defect detection method comprises the following steps:

[0040] 1. Marking defects: When using a cloth inspection machine to inspect cloth, cloth defects are detected and a defect mark is set at the location of the defect point. The defect mark and the corresponding defect point have the same X-axis coordinate, and the defect marks corresponding to different defect points have the same Y-axis coordinate; specifically, the automatic cloth inspection machine detects cloth defects in real time through its visual recognition system. When a defect is detected, a one-dimensional code or a two-dimensional code mark is generated by an automatic pasting machine or an inkjet printer at a specified defect mark position, such as the same X-axis as the defect point and 10 mm away from the edge of the cloth. The defect mark contains basic cloth information such as batch, serial number of the defect mark, and Y-axis coordinate information corresponding to the defect point. Other information such as the defect type code can also be selected.

[0041] 2. Identification mark: When using the spreading machine to spread the cloth, the defect mark set in step 1 is identified by the defect mark identifier, and the X-axis coordinate corresponding to the defect mark is recorded or an X-axis marking strip is placed at the location of the defect mark; specifically, when the main mechanism of the spreading machine moves along the X-axis to spread the cloth, the barcode reader installed on the cutter head assembly synchronously scans the edge of the cloth. When the barcode reader recognizes the label, it synchronously records the current number of spreading layers and the X-axis coordinate information corresponding to the defect point. The system automatically maps the coordinates to the electronic marker map, and marks the information of the defect point at the corresponding cutting position, so that the defect point can be easily found during the inspection.

[0042] Example 3

[0043] Spreading machine with defect recognition and positioning

[0044] Referring to the accompanying drawings, the spreading machine with defect recognition and positioning includes a spreading table 1 and a main machine mechanism 2, a cloth 10 with a defect mark 11 is laid on the spreading table 1, and the defect mark 11 is a one-dimensional code or a two-dimensional code with the same Y-axis coordinate, the main machine mechanism 2 is slidably arranged on the spreading table 1 along the X-axis direction, a lifting assembly 3 is provided on the front side of the main machine mechanism 2, the lifting assembly 3 is connected to the cutter head assembly 4, a code reader 5 that can identify the defect mark 11 is installed on the cutter head assembly 4, and the Y-axis coordinate of the code reader 5 is consistent with the defect mark 11; the code reader 5 can also be other devices that can identify one-dimensional codes or two-dimensional codes.

[0045] During operation, the main mechanism 2 of the spreading machine moves at a constant speed along the X-axis guide rail, and at the same time the cloth is unwound from the roll rack. The code reader 5 continuously scans the area directly below it (the conical area in the accompanying drawing) at a specific frequency. When the defect mark 11 on the edge of the cloth passes under the code reader 5, the code reader 5 can automatically identify the one-dimensional code or the two-dimensional code, and after decoding, the defect is identified and recorded in accordance with the method of Example 1 or Example 2.

[0046] The specific installation structure of the code reader 5 of this embodiment is as follows: the code reader 5 is fixed to the cover 7 of the cutter head assembly 4 through a bracket 6, and the bracket 6 includes a vertical section 6a, a horizontal section 6b, an extension section 6c and a mounting section 6d arranged accordingly. The vertical section 6a is in contact with and fixedly connected to the rear side of the cover 7, and the vertical section 6a is located on the outside of the cutter arm 8. The horizontal section 6b is inclined forward from the outside to the inside, and the extension section 6c extends obliquely upward from the outside to the inside. The mounting section 6d is horizontally distributed, and its bottom is installed toward the device. The code reader 5 is installed; the above-mentioned mounting structure ensures that the code reader 5 is stably installed without interfering with the operation of the cutter head assembly 4, and can accurately extend to the area where the defect mark 11 is located; further, this embodiment also provides an adjustment structure for the installation position of the code reader 5: the vertical section 6a is provided with a vertical adjustment groove in the vertical direction, and the mounting section 6d is provided with a Y-axis adjustment groove along the Y-axis direction. The vertical adjustment groove can adjust the height of the code reader 5, and the Y-axis adjustment groove can adjust the Y-axis position of the code reader 5.

[0047] Furthermore, an edge-to-edge photoelectric sensor 9 is provided on one side of the host mechanism 2, and the code reader 5 is positioned in the same Y-axis coordinate region as the sensing area of ​​the edge-to-edge photoelectric sensor 9. The edge-to-edge photoelectric sensor 9 detects the edge of the fabric 10 in real time, ensuring alignment of the fabric 10 in the Y-axis direction. By positioning the code reader 5 and the defect mark 11 in the same region of the edge-to-edge photoelectric sensor 9, the consistency of the defect mark 11 can be ensured, thereby improving the recognition rate and accuracy of the code reader 5.

[0048] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for detecting fabric defects, characterized in that: The following steps are involved:

1. Marking defects: During the inspection process using a fabric inspection machine, fabric defects are detected and a defect mark is set at the defect point. The defect mark and the corresponding defect point have the same X-axis coordinate, and the defect marks corresponding to different defect points have the same Y-axis coordinate; 2. Identification mark: When using the spreading machine to spread the cloth, the defect mark set in step 1 is identified by the defect mark identifier, and the X-axis coordinate corresponding to the defect mark is recorded or an X-axis marking strip is placed at the location of the defect mark; The defect mark is set by a one-dimensional code or a two-dimensional code, and the defect mark identifier is a code reader or a camera that can recognize a one-dimensional code or a two-dimensional code.

2. A cloth defect detection method according to claim 1, characterized in that: The defect mark is set at the edge of the cloth, the defect mark identifier is set above the corresponding position of the defect mark, and the defect mark identifier scans the area directly below it.

3. The method for detecting fabric defects according to claim 1, wherein: In the step 2, the defect mark identifier is connected to an audible and visual alarm device, and after the defect mark identifier detects the defect mark, the audible and visual alarm device sounds an alarm.

4. The method for detecting cloth defects according to claim 1, wherein: The cloth inspection machine is a manual cloth inspection machine. In step one, cloth defects are identified by the human eye, and defect marks are manually pasted at the corresponding locations of the defect points. In step two, an X-axis marking strip is manually placed, and the X-axis marking strip extends to the outside of the cloth.

5. The method for detecting fabric defects according to claim 1, wherein: The fabric inspection machine is an automatic fabric inspection machine. During the fabric inspection process in step one, a defect mark is automatically sprayed or pasted, and the defect mark records the Y-axis coordinate information of the defect point. During the recognition process in step two, the defect mark identifier automatically records the layer number information and X-axis coordinate information of the defect point when recognizing the defect mark.

6. A fabric spreading machine with defect recognition and positioning, characterized in that: The invention comprises a spreading table (1) and a host mechanism (2), wherein a cloth (10) with a defect mark (11) is spread on the spreading table (1), wherein the defect mark (11) is a one-dimensional code or a two-dimensional code with the same Y-axis coordinate, and the host mechanism (2) is slidably arranged on the spreading table (1) along the X-axis direction, and a lifting component (3) is arranged on the front side of the host mechanism (2), wherein the lifting component (3) is connected to a cutter head component (4), and a code reader (5) capable of identifying the defect mark (11) is installed on the cutter head component (4), and the Y-axis coordinate of the code reader (5) is consistent with the defect mark (11).

7. A spreading machine with defect recognition and positioning according to claim 6, characterized in that: The code reader (5) is fixed to the cover (7) of the cutter head assembly (4) through a bracket (6). The bracket (6) includes a vertical section (6a), a horizontal section (6b), an extension section (6c) and a mounting section (6d) arranged accordingly. The vertical section (6a) is in contact with and fixedly connected to the rear side of the cover (7), and the vertical section (6a) is located on the outside of the cutter arm (8). The horizontal section (6b) is inclined forward from the outside to the inside and is in contact with the upper side of the cover (7). The extension section (6c) extends obliquely upward from the outside to the inside. The mounting section (6d) is horizontally distributed, and its bottom is mounted facing the code reader (5).

8. The fabric spreading machine with defect recognition and positioning according to claim 6, characterized in that: A side-to-side photoelectric sensor (9) is provided on one side of the host mechanism (2), and the code reader (5) is provided in the same Y-axis coordinate area as the sensing area of ​​the side-to-side photoelectric sensor (9).

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