Equipment and methods for detecting defects in ripstop denim fabrics using covered yarn

Abstract

This invention discloses a defect detection device and method for ripstop denim fabric using covered yarn. The invention relates to the field of fabric processing defect detection technology, and includes a frame and a marking mechanism. The frame is equipped with a visual inspection mechanism for detecting fabric defects. Two air shafts, one for tightening the fabric roll, are rotatably mounted on both sides of the frame via bearings. The marking mechanism drives a marker pen to draw straight lines across the fabric to outline the defect contour area, thus delineating the complete shape and actual boundary of the defect. This improves the efficiency of workers in determining the actual range and shape of defects during subsequent fabric cutting and production traceability processes, thereby increasing the efficiency of subsequent defect handling. After marking, a serial number can be added next to the defect according to the defect marking sequence, facilitating quick identification of the corresponding defect in the inspection data report during subsequent defect handling.

Description

Technical Field

[0001] This invention relates to the field of fabric processing defect detection technology, specifically to equipment and methods for detecting processing defects in ripstop denim fabric using covered yarn. Background Technology

[0002] When processing ripstop denim fabric using covered yarns, it is necessary to inspect its surface for defects. For example, surface defects need to be inspected after weaving and after the finished product is completed. Currently, visual inspection is generally used, such as the linear array fabric inspection machine disclosed in announcement number CN222689661U. This machine includes a frame and an inspection table. The inspection table has light-transmitting holes and is connected to the frame via linear guide rails, allowing it to move up and down relative to the frame. It also includes several cameras and a light source. This existing technology has advantages such as adjustable inspection table height, better fabric feeding, and reduced wrinkles.

[0003] However, existing technologies still require marking defects. The purpose of marking is to facilitate the subsequent cutting of fabric at the defective location, and it is also necessary to trace the source to find the defects in the processing process and reduce the defect rate. For example, CN211664327U discloses a fabric detection and winding device, whose defect marking mechanism includes a first lifting hydraulic cylinder and a marking head. The pneumatic shaft of the first lifting hydraulic cylinder is set vertically downward, and the marking head is provided on the pneumatic shaft of the first lifting hydraulic cylinder.

[0004] Existing defect detection equipment's defect marking structure only supports single-point fixed-point marking operations. For long strip or large-area continuous defect areas on the fabric surface, it cannot continuously and smoothly outline the complete shape and actual boundary range of the defect. Consequently, when carrying out subsequent processes such as fabric cutting and production traceability, operators need to repeatedly and carefully compare the detection data report with the defect to determine the actual range and shape of the defect, thus affecting the efficiency of subsequent defect handling. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a defect detection device and method for ripstop denim fabrics using covered yarns, thus solving the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a defect detection device for ripstop denim fabric using covered yarn, comprising a frame and a marking mechanism. The frame is equipped with a visual inspection mechanism for detecting defects in the fabric. Two air shafts, one for tightening the fabric roll, are rotatably mounted on both sides of the frame via bearings. The frame also includes a servo-driven geared motor with an output shaft connected to the second air shaft. Guiding mechanisms for guiding the fabric are located on both sides of the visual inspection mechanism. A tension roller for tensioning the fabric is also mounted on the frame. The marking mechanism drives a marker pen to draw straight lines to mark the defect contour area on the fabric.

[0007] Preferably, the marking mechanism is also used to sequentially mark each defect with a serial number, and the serial number is composed of a straight line segment without arcs, which is adapted to drive the marker pen to make a linear motion.

[0008] Preferably, the marking mechanism includes a base, on which a second servo geared motor is mounted. The output shaft of the second servo geared motor is rotatably connected to the base via bearings. An electric guide rail is also mounted on the output shaft of the second servo geared motor. The output end of the first electric guide rail is connected to the second electric guide rail, which drives the marker to move in the forward-backward direction. The output end of the second electric guide rail is connected to a mounting base, which drives the marker to move in the left-right direction. An electric push rod is mounted on the mounting base. The output end of the electric push rod is slidably connected to a slide block, which drives the marker to rise and fall. A sliding sleeve is mounted on the bottom of the slide block, and the sliding sleeve is slidably connected to a clamping assembly for holding the marker. A buffer spring is also connected between the sliding sleeve and the clamping assembly. A blowing assembly is also mounted on the slide block, which moves synchronously with the slide block to blow air onto the marking area formed by the marker.

[0009] Preferably, the clamping assembly includes a sliding frame connected to a buffer spring, the sliding frame being slidably connected to a sliding sleeve, a fixing block being fixedly connected to one side of the sliding frame, a slider being slidably passed through the other side of the sliding frame, a sliding rod being provided on the slider, and anti-slip pads being provided on the opposite sides of the sliding rod and the fixing block for contact with the marker pen, the surface of the marker pen also being provided with protrusions, the top of the protrusions contacting the sliding rod, and a bolt connecting the slider and the sliding frame.

[0010] Preferably, the blowing assembly includes a mounting box mounted on a slide, the side of the mounting box having an opening, the bottom of the mounting box being connected to a connecting pipe via a telescopic flexible hose, the connecting pipe being connected to a cylinder, and the cylinder also having a connecting rod connected to a slide frame, the inner wall of the cylinder having a sealing ring that fits with a marker pen, the bottom of the cylinder also having an elongated air blowing groove, the tip of the marker pen extending through the air blowing groove, a filter plate being installed inside the mounting box, and a blower fan being installed on the mounting box, the blower fan being located between the telescopic flexible hose and the filter plate, and a collection hopper being installed on the side of the filter plate away from the blower fan, the bottom of the collection hopper being threadedly connected to a collection cylinder.

[0011] Preferably, the connecting pipe is connected to a linkage rod that slides vertically through the top of the mounting box, and the linkage rod is provided with a brush located inside the mounting box, and the brush bristles are elastically attached to the side of the filter plate away from the blower.

[0012] Preferably, the visual inspection mechanism includes a frame and a base plate disposed at the bottom of the frame. The base plate is connected to the frame, and the frame is connected to the base. Side plates are provided on both sides of the frame, and a through groove is provided between the side plate and the base plate. Line scan cameras are evenly arranged inside the frame, facing the base plate. Light source plates are provided on the inner walls of the front and rear sides of the frame. A maintenance plate is provided on the right side plate. The marker pen is located on the left side of the side plate, and a rubber strip bent and abutting against the base plate is provided at the bottom of the side plate.

[0013] Preferably, the guiding mechanism includes a support roller rotatably connected to the frame via bearings. A fixed frame is also provided on the frame, and a hydraulic cylinder is mounted on the fixed frame. The piston rod of the hydraulic cylinder is slidably connected to a mounting plate on the fixed frame. A pressure roller located above the support roller is rotatably connected to the mounting plate via bearings. The top of the support roller is aligned with the top of the base plate. A controller is also provided on the frame, and a touch screen is provided on the frame. The controller is electrically connected to air shaft one, air shaft two, servo geared motor one, touch screen, servo geared motor two, electric guide rail one, electric guide rail two, electric push rod, blower, line scan camera, light source board, and hydraulic cylinder.

[0014] A method for detecting defects in ripstop denim fabric using covered yarns, the method comprising the following steps: Step 1: Install the roll of fabric to be inspected by tightening it with air shaft one, and install the roll to be wound up by tightening it with air shaft two in the same way. Step 2: Pull out one end of the fabric, so that the fabric passes over the tension roller and enters the rear guide mechanism for guidance, then enters the vision inspection mechanism for visual defect detection, and finally passes through the front guide mechanism for guidance and is wound onto the front drum. After being connected to the front drum, the fabric is continuously inspected by the servo reduction motor driving the air shaft to rotate. Step 3: When a defect is detected, the fabric is conveyed out of the visual inspection mechanism and then stopped. The marking mechanism drives the marker pen to draw a straight line to mark the defect outline area on the fabric. After marking, the defect is marked with a serial number next to it according to the defect marking order. The serial number is composed of flat straight line segments without arcs, which is adapted to the marking mechanism to drive the marker pen to make a straight line movement. Step 4: After all the fabrics have been inspected, release air shaft one and air shaft two to inspect the next batch of fabrics.

[0015] In steps two, three, and four, defect detection and marking of the head and tail areas of the fabric are all performed by manually pulling and tensioning the fabric.

[0016] This invention provides a device and method for detecting defects in the processing of ripstop denim fabric using covered yarn. Compared with the prior art, it has the following advantages: 1. This defect detection equipment and method for ripstop denim fabric using covered yarn utilizes a marking mechanism that drives a marker pen to draw straight lines across the fabric to outline the defect area. This delineates the complete shape and actual boundary of the defect, improving the efficiency of determining the actual extent and shape of defects during subsequent fabric cutting and production traceability processes, thereby enhancing the efficiency of subsequent defect handling. After marking, a serial number can be added next to the defect according to the defect marking sequence. This facilitates quick identification of the corresponding defect in the inspection data report during subsequent defect handling. The serial numbers are composed of flat, straight segments without arcs, adapting to the linear motion of the marker pen driven by the marking mechanism. The absence of arc segments simplifies the motion control logic and improves the efficiency of serial number marking.

[0017] 2. The defect detection equipment and method for ripstop denim fabric using covered yarn: The marking mechanism consists of a servo reduction motor, an electric guide rail, an electric guide rail, and an electric push rod working together to achieve flexible adjustment of the marker position and tilt angle. It can complete straight marking lines at different positions and angles according to the actual defect contour of the fabric, and the marking line adaptability is higher.

[0018] 3. The defect detection equipment and method for tear-resistant denim fabric using covered yarn allows the sliding frame to slide on the sliding sleeve when the marker pen descends and contacts the fabric, compressing the buffer spring to form a flexible buffer fit, avoiding rigid impact. At the same time, it can adapt to small fluctuations in the fabric, maintaining effective pen pressure, thereby ensuring uniform depth of the marking lines.

[0019] 4. This equipment and method for detecting defects in ripstop denim fabric using covered yarn involves a mounting box that moves with the slide, allowing the cylinder to follow the marker pen. A fan blows air into the cylinder, filtering outside air through a filter plate before it enters via a flexible hose and connecting pipe. Because a sealing ring is installed at the top of the cylinder to fit the marker pen, the airflow is effectively delivered to the marking line through a long, narrow air channel, accelerating the drying of the solvent on the marking surface. This allows for sufficient natural drying during the subsequent winding process, preventing the markings and lines from becoming blurred or smudged during rewinding.

[0020] 5. This defect detection equipment and method for ripstop denim fabric using covered yarn involves connecting a brush to a connecting pipe via a linkage rod. When the buffer spring swings back and forth, it directly drives the brush to move up and down along the filter plate, scraping away dust. The sliding friction generated by the brush cleaning the filter plate creates passive damping, allowing the buffer spring to quickly return to its original position. This eliminates the need for a pre-set buffer time, effectively improving the efficiency of continuous marking operations. It also ensures uniform and consistent pressure between the marker and the fabric in each marking operation. Furthermore, the inherent extension and contraction stroke of the buffer spring allows for simultaneous automatic cleaning of dust accumulation on the filter plate, making it a multi-functional machine. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the entire invention; Figure 2 For the present invention Figure 1 Another perspective illustration; Figure 3 This is a schematic diagram of the marking mechanism of the present invention; Figure 4 This is a schematic diagram of the clamping assembly and the blower assembly of the present invention; Figure 5 This is a cross-sectional schematic diagram of the clamping component and the blower component of the present invention; Figure 6 For the present invention Figure 4 Another perspective illustration; Figure 7 For the present invention Figure 5 A schematic diagram at point A in the middle; Figure 8 For the present invention Figure 5 A schematic diagram at point B in the middle; Figure 9 This is a schematic diagram of the air blowing groove of the present invention; Figure 10 This is a schematic diagram of the visual inspection mechanism of the present invention; Figure 11 This is a schematic diagram of the line scan camera and light source board of the present invention; Figure 12 For the present invention Figure 10 A cross-sectional schematic diagram; Figure 13 For the present invention Figure 12 A schematic diagram at point C.

[0022] In the diagram: 1. Frame; 4. Air shaft one; 5. Air shaft two; 6. Servo geared motor one; 8. Tension roller; 10. Controller; 11. Touch screen display. 2. Marking mechanism; 21. Base; 22. Servo geared motor II; 23. Electric guide rail I; 24. Electric guide rail II; 25. Mounting base; 26. Electric push rod; 27. Slide; 28. Sliding sleeve; 29. ​​Buffer spring; 210. Clamping assembly; 2101. Sliding frame; 2102. Fixing block; 2103. Sliding block; 2104. Sliding rod; 2105. Bolts; 211. Blower assembly; 2111. Mounting box; 2112. Telescopic hose; 2113. Connecting pipe; 2114. 2115. Cylinder; 2116. Connecting rod; 2117. Sealing ring; 2118. Air blowing groove; 2119. Filter plate; Fan; 21110. Collection hopper; 21111. Collection cylinder; 21112. Linkage rod; 21113. Brush; 3. Visual inspection mechanism; 31. Frame; 32. Base plate; 33. Side plate; 34. Through groove; 35. Line scan camera; 36. Light source plate; 37. Inspection plate; 38. Rubber belt; 7. Guiding mechanism; 71. Support roller; 72. Fixing frame; 73. Hydraulic cylinder; 74. Mounting plate; 75. Pressure roller; 9. Marker pen; 91. Embossing. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] See Figures 1-13 The present invention provides the following two technical solutions: The first implementation method is a defect detection device for ripstop denim fabric with covered yarn, including a frame 1 and a marking mechanism 2. The frame 1 is equipped with a visual inspection mechanism 3 for detecting defects in the fabric. On both sides of the frame 1, air shaft 4 and air shaft 5 for tightening the fabric roll are rotatably mounted via bearings. The frame 1 is also equipped with a servo geared motor 6 whose output shaft is connected to the air shaft 5. The servo geared motor 6 achieves precise rotation control through an encoder. On both sides of the visual inspection mechanism 3, the frame 1 is equipped with a guide mechanism 7 for guiding the fabric. The frame 1 is also equipped with a tension roller 8 for tensioning the fabric. The marking mechanism 2 is used to drive a marker pen 9 to draw straight lines to mark the defect outline area on the fabric. This can outline the complete shape and actual boundary range of the defect, thereby improving the efficiency of operators in determining the actual range and shape of the defect when carrying out subsequent fabric cutting and production traceability processes, and thus improving the efficiency of subsequent defect handling.

[0025] The marking mechanism 2 is also used to sequentially mark each defect with a serial number, and the serial number is composed of a straight line segment without arcs, which is adapted to drive the marker pen 9 to make a linear motion.

[0026] The defects are numbered sequentially to facilitate quick alignment with the inspection data report during subsequent defect processing. The absence of circular arc segments in the serial numbers simplifies the motion control logic and improves the efficiency of serial number marking.

[0027] The marking mechanism 2 includes a base 21, on which a second servo geared motor 22 is mounted. The output shaft of the second servo geared motor 22 is rotatably connected to the base 21 via bearings. An electric guide rail 23 is also mounted on the output shaft of the second servo geared motor 22. The output end of the first electric guide rail 23 is connected to an electric guide rail 24, which drives the marker pen 9 to move in the forward-backward direction. The output end of the second electric guide rail 24 is connected to a mounting base 25, which drives the marker pen 9 to move in the left-right direction. An electric push rod 26 is mounted on the mounting base 25. The output end of the push rod 26 is provided with a slide block 27 that is slidably connected to the mounting base 25. The slide block 27 is slidably connected to the mounting base 25 and can play a guiding role. The electric push rod 26 is used to drive the marker pen 9 to rise and fall. The bottom of the slide block 27 is provided with a sliding sleeve 28, which is slidably connected to the clamping component 210 for holding the marker pen 9. A buffer spring 29 is also connected between the sliding sleeve 28 and the clamping component 210. The slide block 27 is also provided with a blower component 211, which moves synchronously with the slide block 27 to blow air onto the marking area formed by the marker pen 9.

[0028] Servo geared motor 22 drives electric guide rail 23 to rotate, which in turn drives electric guide rail 24 to rotate, so that the marker pen 9 can tilt to draw lines when drawing lines, so as to follow the defect area for drawing lines. Electric guide rail 23 is used to drive the marker pen 9 to move in the front and back direction, and electric guide rail 24 is used to drive the marker pen 9 to move in the left and right direction, so that the marking lines can be drawn in various places on the fabric. Electric push rod 26 drives the marker pen 9 to rise and fall, which is used to drive the marker pen 9 to leave the fabric.

[0029] When the marker 9 descends and contacts the fabric, the slide frame 2101 can slide on the slide sleeve 28, compressing the buffer spring 29 to form a flexible buffer fit, avoiding rigid impact. At the same time, it can adapt to the slight ups and downs of the fabric, maintaining effective pen pressure, thereby ensuring that the marking lines are even in depth.

[0030] The clamping assembly 210 includes a slide frame 2101 connected to a buffer spring 29, which allows the slide frame 2101 to compress the buffer spring 29. The slide frame 2101 is also slidably connected to a slide sleeve 28. A fixing block 2102 is fixedly connected to one side of the slide frame 2101, and a slider 2103 slides through the other side of the slide frame 2101. A slider 2104 is provided on the slider 2103. Anti-slip pads that contact the marker pen 9 are provided on the opposite sides of the slider 2104 and the fixing block 2102. A protrusion 91 is also provided on the surface of the marker pen 9. The top of the protrusion 91 contacts the slider 2104. A bolt 2105 connects the slider 2103 and the slide frame 2101.

[0031] First, place the marker 9 against the anti-slip pad of the fixing block 2102, then move the slide bar 2104 to make the slider 2103 slide. This will allow the anti-slip pad of the slide bar 2104 to press the marker 9 firmly, and make the top of the protrusion 91 abut against the slide bar 2104. Then, the bolt 2105 can be installed. When the tip of the marker 9 is impacted, the protrusion 91 can directly apply force to the slide bar 2104, causing the sliding frame 2101 to move upward. This avoids relying solely on the friction on both sides of the marker 9, thereby improving the stability of the marker 9 clamping.

[0032] The blower assembly 211 includes a mounting box 2111 mounted on a slide 27. The mounting box 2111 has an opening on its side. The bottom of the mounting box 2111 is connected to a connecting pipe 2113 via a flexible telescopic hose 2112. The connecting pipe 2113 is connected to a cylinder 2114, and the cylinder 2114 is also equipped with a connecting rod 2115 that connects to the slide frame 2101. The inner wall of the cylinder 2114 is provided with a sealing ring 2116 that fits against the marker pen 9. The bottom of the cylinder 2114 also has an opening... There is a long, narrow air-blowing channel 2117, through which the tip of the marker pen 9 extends. A filter plate 2118 is installed inside the mounting box 2111, and a blower 2119 is also installed on the mounting box 2111. The blower 2119 is located between the telescopic hose 2112 and the filter plate 2118. A collection hopper 21110 is provided on the side of the mounting box 2111 away from the blower 2119 on the filter plate 2118. A collection cylinder 21111 is threadedly connected to the bottom of the collection hopper 21110.

[0033] Currently, oil-based markers 9 are generally used. Their advantages are good waterproof effect after drying and strong mark retention stability. However, natural drying takes a long time. Therefore, by moving the mounting box 2111 with the slide 27, the cylinder 2114 can always follow the marker 9. Then, the fan 2119 blows air. The outside air is filtered through the filter plate 2118 and enters the cylinder 2114 through the telescopic hose 2112 and the connecting pipe 2113. Since the cylinder 2114 is equipped with a sealing ring 2116 that fits with the marker 9, the airflow can be effectively blown out through the long strip-shaped air groove 2117 that matches the marking line and act on the marking line. This can accelerate the drying of the solvent on the marking surface and achieve surface drying. Therefore, when it is time to rewind, it will take a certain amount of time to dry naturally. This time will be sufficient to avoid the marking and marking from being easily smudged and blurred during subsequent rewinding.

[0034] The telescopic hose 2112 does not affect the change in distance between the connecting pipe 2113 and the mounting box 2111.

[0035] Given that the contact force between the marker 9 and the fabric is relatively small, a stiff spring with high rigidity is not suitable. A flexible spring is required to adapt to the light contact operation. However, the flexible spring has a large elastic deformation margin and a slow self-reset speed. In addition, the servo reduction motor 22, electric guide rail 23, electric guide rail 24 and electric push rod 26 on the marking mechanism 2 all have inertial impact when starting and stopping, which can easily induce the buffer spring 29 to swing back and forth. If it is not allowed to stop naturally before the next stroke, the buffer will fail because the spring has not fully reset. Moreover, waiting for it to stop will affect the line drawing efficiency. Therefore, a linkage rod 21112 that slides vertically through the top of the mounting box 2111 is connected to the connecting pipe 2113. A brush 21113 located inside the mounting box 2111 is set on the linkage rod 21112, and the brush bristles of the brush 21113 are elastically attached to the side of the filter plate 2118 away from the blower 2119.

[0036] The brush 21113 is connected to the connecting pipe 2113 via the linkage rod 21112. When the buffer spring 29 swings back and forth, it directly drives the brush 21113 to move up and down along the filter plate 2118 to scrape dust. The sliding friction generated by the brush 21113 cleaning the filter plate 2118 forms passive damping, which enables the buffer spring 29 to quickly return to its original position. This eliminates the need for a pre-set static buffer time, effectively improving the efficiency of continuous marking operations. It also ensures that the pressure between the marker pen 9 and the fabric is uniform and consistent in each marking operation. Furthermore, the inherent extension and contraction stroke of the buffer spring 29 can be used to automatically clean the dust accumulated on the filter plate. This makes it a multi-purpose machine.

[0037] The visual inspection mechanism 3 includes a frame 31 and a base plate 32 located at the bottom of the frame 31. The base plate 32 is connected to the frame 1, and the frame 31 is connected to the base 21. Side plates 33 are provided on both sides of the frame 31. A through groove 34 is provided between the side plate 33 and the base plate 32. Line scan cameras 35 are evenly arranged inside the frame 31, facing the base plate 32. Light source plates 36 are provided on the inner walls of the front and rear sides of the frame 31. The line scan cameras 35 and the light source plates 36 work together to perform visual inspection on the fabric. A maintenance plate 37 is provided on the right side plate 33. A marker pen 9 is located on the left side of the side plate 33. A rubber strip 38 is bent and abuts against the base plate 32 at the bottom of the side plate 33, so that when the fabric passes through the through groove 34 from the base plate 32, it can abut against the rubber strips 38 on both sides, preventing dust from entering and avoiding the influence of external natural light. The frame 31 can be made of aluminum alloy to facilitate heat dissipation of the internal structure.

[0038] The second embodiment differs from the first embodiment in that the guiding mechanism 7 includes a support roller 71 rotatably connected to the frame 1 via a bearing. A fixed frame 72 is also provided on the frame 1. A hydraulic cylinder 73 is provided on the fixed frame 72. The piston rod of the hydraulic cylinder 73 is connected to a mounting plate 74 slidably connected to the fixed frame 72. A pressure roller 75 located above the support roller 71 is rotatably connected to the mounting plate 74 via a bearing. The top of the support roller 71 is aligned with the top of the base plate 32, so that the distance between the pressure roller 75 and the support roller 71 is adjustable to accommodate fabrics of different thicknesses.

[0039] The frame 31 is also equipped with a controller 10, which can be a Siemens S7-1500. The frame 1 is equipped with a touch screen display 11, which can be a matching Siemens display. The controller 10 is electrically connected to the first air shaft 4, the second air shaft 5, the first servo geared motor 6, the touch screen display 11, the second servo geared motor 22, the first electric guide rail 23, the second electric guide rail 24, the electric push rod 26, the blower 2119, the line scan camera, the light source board 36, and the hydraulic cylinder 73 to facilitate power supply and control.

[0040] A method for detecting defects in ripstop denim fabric using covered yarn, specifically the ripstop denim fabric processing defect detection device using covered yarn as described in the second embodiment, includes the following steps: Step 1: Install the roll of fabric to be inspected by using air shaft 4 to tighten it, and install the roll to be wound up by using air shaft 5 to tighten it as well. Step 2: Pull out one end of the fabric, so that the fabric passes over the tension roller 8 and enters the rear guide mechanism 7 for guidance, then enters the vision inspection mechanism 3 for visual defect detection, and finally passes through the front guide mechanism 7 and is wound onto the front drum. After being connected to the front drum, the air shaft 5 is driven to rotate by the servo reduction motor 6 to continuously inspect the fabric. Step 3: When a defect is detected, the fabric is conveyed out of the visual inspection mechanism 3 and then stopped. The marking mechanism 2 drives the marker pen 9 to draw a straight line to mark the defect outline area on the fabric. After marking, the defect is marked with a serial number next to it according to the defect marking order. The serial number is composed of flat straight line segments without arcs, which is adapted to the marking mechanism 2 to drive the marker pen 9 to make a straight line movement. Step 4: After all the fabrics have been inspected, release air shaft 4 and air shaft 5 to inspect the next batch of fabrics.

[0041] In steps two, three, and four, the fabric is tensioned manually when performing defect detection and marking on the head and tail areas of the fabric.

[0042] Furthermore, all content not described in detail in this specification is existing technology known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tear-resistant denim fabric with covering yarn processing defect detection equipment, including rack (1) and marking mechanism (2), the rack (1) is provided with visual detection mechanism (3) for detecting defects of the fabric, the both sides of the rack (1) are rotatably provided with air expansion shaft one (4) and air expansion shaft two (5) for expanding the fabric roll, the rack (1) is further provided with servo reduction motor one (6) with the output shaft connected with the air expansion shaft two (5), the both sides of the visual detection mechanism (3) of the rack (1) are provided with guiding mechanism (7) for guiding the fabric, the rack (1) is further provided with tension roller (8) for tensioning the fabric, characterized in that: The marking mechanism (2) is used for driving the marker (9) to make linear marking frame selection marking on the defect contour area on the fabric.

2. The device for detecting processing defects of a tear-resistant denim fabric with an overthread according to claim 1, characterized in that: The marking mechanism (2) is also used for sequentially marking each defect with a sequence number, and the sequence number is composed of straight line segments without circular arcs, which is suitable for driving the marker (9) to make linear motion.

3. The device for detecting processing defects of a tear-resistant denim fabric with an overthread according to claim 1, characterized in that: The marking mechanism (2) comprises a machine base (21), a servo reduction motor (22) is arranged on the machine base (21), the output shaft of the servo reduction motor (22) is rotatably connected with the machine base (21) through a bearing, and an electric guide rail (23) is further arranged on the output shaft of the servo reduction motor (22). The output end of the electric guide rail (23) is connected with an electric guide rail (24), the electric guide rail (23) is used for driving the marker (9) to move in the front-rear direction, the output end of the electric guide rail (24) is connected with a mounting seat (25), and the electric guide rail (24) is used for driving the marker (9) to move in the left-right direction. An electric push rod (26) is arranged on the mounting seat (25), a sliding seat (27) in sliding connection with the mounting seat (25) is arranged on the output end of the electric push rod (26), the electric push rod (26) is used for driving the marker (9) to ascend and descend, a sliding sleeve (28) is arranged at the bottom of the sliding seat (27), the sliding sleeve (28) is in sliding connection with a clamping assembly (210) used for clamping the marker (9), a buffer spring (29) is further connected between the sliding sleeve (28) and the clamping assembly (210), and a blowing assembly (211) is further arranged on the sliding seat (27). The blowing assembly (211) moves synchronously with the sliding seat (27) and blows the marking area formed by the marker (9) in a following manner.

4. The device for processing defect detection of tear-resistant denim fabric with wrapping yarn according to claim 3, characterized in that: The clamping assembly (210) comprises a sliding frame (2101) connected with the buffer spring (29), the sliding frame (2101) is further in sliding connection with the sliding sleeve (28), one side of the sliding frame (2101) is fixedly connected with a fixed block (2102), the other side of the sliding frame (2101) is slidably penetrated by a sliding block (2103), a sliding rod (2104) is arranged on the sliding block (2103), anti-skid pads in contact with the marker (9) are arranged on the opposite sides of the sliding rod (2104) and the fixed block (2102), a protruding block (91) is arranged on the surface of the marker (9), the top of the protruding block (91) is in contact with the sliding rod (2104), and a screw (2105) is connected between the sliding block (2103) and the sliding frame (2101).

5. The device for detecting processing defects of a tear-resistant denim fabric with an overend yarn according to claim 4, characterized in that: The blower assembly (211) includes a mounting box (2111) mounted on a slide (27). The mounting box (2111) has an opening on its side. The bottom of the mounting box (2111) is connected to a connecting pipe (2113) via a telescopic flexible hose (2112). The connecting pipe (2113) is connected to a cylinder (2114). The cylinder (2114) is also provided with a connecting rod (2115) connected to the slide frame (2101). The inner wall of the cylinder (2114) is provided with a sealing ring (2116) that fits against the marker pen (9). The bottom of the cylinder (2114) is also provided with an opening. There is a long strip-shaped air blowing groove (2117), the tip of the marker (9) extends out through the air blowing groove (2117), the installation box (2111) is provided with a filter plate (2118), the installation box (2111) is also provided with a blower (2119), the blower (2119) is located between the telescopic hose (2112) and the filter plate (2118), the installation box (2111) has a collection hopper (21110) on the side of the filter plate (2118) away from the blower (2119), and the bottom of the collection hopper (21110) is threadedly connected to a collection cylinder (21111).

6. The device for detecting processing defects of a tear-resistant denim fabric with an overthread according to claim 5, characterized in that: The connecting pipe (2113) is connected to a vertically sliding linkage rod (21112) that slides through the top of the mounting box (2111). The linkage rod (21112) is equipped with a brush (21113) located inside the mounting box (2111), and the bristle end of the brush (21113) is elastically attached to the side of the filter plate (2118) away from the blower (2119).

7. The device for processing defect detection of tear-resistant denim fabric with wrapping yarn according to claim 5, characterized in that: The visual inspection mechanism (3) includes a frame (31) and a base plate (32) at the bottom of the frame (31). The base plate (32) is connected to the frame (1), and the frame (31) is connected to the base (21). Side plates (33) are provided on both sides of the frame (31). A through groove (34) is provided between the side plate (33) and the base plate (32). Line scanning cameras (35) facing the base plate (32) are evenly arranged inside the frame (31). Light source plates (36) are provided on the inner walls of the front and rear sides of the frame (31). A maintenance plate (37) is provided on the right side plate (33). The marker pen (9) is located on the left side of the side plate (33). A rubber strip (38) bent and abutting against the base plate (32) is provided at the bottom of the side plate (33).

8. The device for processing defect detection of tear-resistant denim fabric with covering yarn according to claim 7, characterized in that: The guiding mechanism (7) includes a support roller (71) rotatably connected to the frame (1) via bearings. A fixed frame (72) is also provided on the frame (1). A hydraulic cylinder (73) is provided on the fixed frame (72). The piston rod of the hydraulic cylinder (73) is connected to a mounting plate (74) slidably connected to the fixed frame (72). A pressure roller (75) located above the support roller (71) is rotatably connected to the mounting plate (74) via bearings. The top of the support roller (71) is connected to the top of the base plate (32). The frame (31) is also equipped with a controller (10), and the frame (1) is equipped with a touch screen (11). The controller (10) is electrically connected to the first air shaft (4), the second air shaft (5), the first servo geared motor (6), the touch screen (11), the second servo geared motor (22), the first electric guide rail (23), the second electric guide rail (24), the electric push rod (26), the blower (2119), the line scan camera, the light source board (36), and the hydraulic cylinder (73).

9. A method for detecting defects in the processing of a tear-resistant denim fabric with an overend yarn, characterized in that: Using the tear-resistant denim fabric processing defect detection equipment with covered yarn as described in any one of claims 1-8, the method includes the following steps: Step 1: Install the roll of fabric to be tested by air expansion shaft one (4), and install the roll to be wound up by air expansion shaft two (5); Step 2: Pull out one end of the fabric, so that the fabric passes over the tension roller (8) and enters the rear guide mechanism (7) for guidance, then enters the visual inspection mechanism (3) for visual defect detection, and finally passes through the front guide mechanism (7) for guidance and is wound onto the front drum. After being connected to the front drum, the air shaft (5) is driven to rotate by the servo reduction motor (6) to perform continuous fabric inspection. Step 3: When a defect is detected, the fabric is continued to be transported out of the visual inspection mechanism (3) and then stopped. The marking mechanism (2) drives the marker pen (9) to draw a straight line to mark the defect outline area on the fabric. After the marking is completed, the serial number is marked next to the defect according to the defect marking order. The serial number is composed of flat straight line segments without arcs. The marking mechanism (2) drives the marker pen (9) to make a straight line movement. Step 4: After all the fabrics have been inspected, release the first air shaft (4) and the second air shaft (5) to inspect the next batch of fabrics.

10. The method of claim 9, wherein the method further comprises: In steps two, three, and four, defect detection and marking of the head and tail areas of the fabric are all performed by manually pulling and tensioning the fabric.

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