A large circular knitting machine cloth inspection device and cloth inspection method thereof

Abstract

The present invention relates to the technical field of large circular knitting machines, and in particular to a large circular knitting machine cloth inspection device and a cloth inspection method thereof, which are used to improve the accuracy of cloth inspection, and include a base, a bracket, a support rod, a cloth inspection system, a fabric conveying mechanism, a first driving motor, a second driving motor, a first transmission mechanism, a second transmission mechanism, a yarn supply mechanism, a weaving mechanism and a pulling and winding mechanism. The bracket and the weaving mechanism are both arranged at the upper end of the base, the yarn supply mechanism is arranged at the upper end of the bracket, the support rod is arranged at the middle part of the bracket, the pulling and winding mechanism is arranged on the base and located at the lower side of the weaving mechanism, the second driving motor drives the pulling and winding mechanism to rotate through the second transmission mechanism, and the fabric conveying mechanism is arranged between the weaving mechanism and the pulling and winding mechanism; the fabric conveying mechanism includes an inner cylinder, an outer cylinder, a first clamping and conveying assembly, a second clamping and conveying assembly, at least three transmission assemblies, an upper guide assembly, a lower guide assembly and an arc-shaped support sheet.

Description

Technical Field

[0001] The invention relates to the technical field of large circular knitting machines, and in particular to a large circular knitting machine cloth inspection device and a cloth inspection method thereof. Background Art

[0002] The traditional method of inspecting fabrics is to use a circular knitting machine to weave the fabrics, then reel them up, transfer the rolled fabrics to an inspection station, and unfold them for defect inspection with the help of the human eye. However, due to the high cost and fatigue of manual inspection, and the inability of the human eye to inspect on a high-speed production line, traditional human eye inspection cannot meet the requirements of high-quality production processes.

[0003] Patent application publication number CN117230567A discloses a method for inspecting fabrics by rolling up a large circular knitting machine, specifically disclosing a base, a bracket, an electrical control system, a first drive motor, a first transmission mechanism, a yarn supply mechanism, a weaving mechanism, and a pulling and winding mechanism, wherein the electrical control system includes a fabric detection device, and the fabric detection device includes an industrial camera, a memory, an image processor, an LED light, an encoder, a wireless connection device, and a display, and the fabric inspection method of the fabric detection device includes the following steps: 1) pre-storing a standard image of the fabric and images of various defect types in the memory; 2) controlling the tubular structure fabric woven by the weaving mechanism, and rotating and winding the fabric through the pulling and winding mechanism, so that the fabric has a detection area with a spiral structure, defining the detection area formed by the pulling and winding mechanism rotating one circle as a detection unit, so that the detection area of ​​the fabric has a detection unit with continuous conveying, obtaining the conveying starting point, winding speed, rotation speed, and circumference of the fabric, and determining the boundaries of each detection unit; 3) adjusting the shooting area of ​​the industrial camera so that the shooting area covers the longitudinal width boundary of the detection unit, and passing The industrial camera continuously shoots along the trajectory of a single detection unit to obtain an image of the fabric to be detected, and the image of the fabric to be detected is encoded by the encoder and sent to the image processor; 4) The image processor retrieves the standard image of the fabric in the memory for comparison to determine whether there is a defect on the image of the fabric to be detected obtained in step 3). When there is a defect, the defect position is determined according to the number of detection units and the boundaries of each detection unit, and then the image processor retrieves images of various defect types for comparison to determine the defect type and defect area, and then the image processor determines the defect level according to the defect type and defect area, and then the image of the fabric obtained in step 3) is stored in the memory; when there is no defect, the image processor deletes the image of the fabric obtained in step 3); 5) When it is determined that there is a defect in step 4), the image of the fabric obtained in step 3) and the data of the defect type, defect area, defect location, and defect level are remotely transmitted to the operating mobile device through a wireless connection device, providing remote access to the mobile device, and receiving control instructions issued by the mobile device.

[0004] However, during the actual equipment testing process, it was found that a spreading mechanism for spreading textile fabrics is provided to facilitate the shooting of industrial cameras. Since the clamping parts of the spreading mechanism are arranged on the two support plates of the pulling and winding mechanism, the clamping parts rotate with the pulling and winding mechanism when it rotates, and the spreading parts of the spreading mechanism are fixed structures, the textile fabrics passing through the spreading mechanism are occasionally pulled during transportation and show texture. When the texture is formed in the shooting area of ​​the industrial camera, it is easy to cause errors in the image of the fabric obtained, affecting the accuracy of the cloth inspection. Summary of the invention

[0005] Therefore, in view of the above problems, the present invention provides a circular knitting machine cloth inspection device and a cloth inspection method thereof for improving cloth inspection accuracy.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A large circular knitting machine cloth inspection device comprises a base, a bracket, a support rod, a cloth inspection system, a fabric conveying mechanism, a first driving motor, a second driving motor, a first transmission mechanism, a second transmission mechanism, a yarn supply mechanism, a weaving mechanism and a pulling and winding mechanism, wherein the bracket and the weaving mechanism are both arranged at the upper end of the base, and the bracket is distributed on the outside of the weaving mechanism, the first driving motor drives the weaving mechanism to move through the first transmission mechanism, the yarn supply mechanism is arranged at the upper end of the bracket, the support rod is arranged at the middle part of the bracket, the pulling and winding mechanism is arranged on the base and at the lower side of the weaving mechanism, the second driving motor drives the pulling and winding mechanism to rotate through the second transmission mechanism, and the fabric conveying mechanism is arranged between the weaving mechanism and the pulling and winding mechanism;

[0008] The fabric conveying mechanism comprises an inner cylinder, an outer cylinder, a first clamping and conveying assembly, a second clamping and conveying assembly, at least three transmission assemblies, an upper guide assembly, a lower guide assembly and an arc-shaped support sheet. The inner cylinder is arranged on a support rod. A rectangular groove distributed along its axial direction is provided on the circumferential outer surface of the inner cylinder. The arc-shaped support sheet is arranged on the support rod and distributed at the rectangular groove. The arc-shaped support sheet has a convex surface and a concave surface. The concave surface of the arc-shaped support sheet faces one side of the central axis of the inner cylinder. The arc-shaped support sheet is a transparent structure. The curvature of the arc-shaped support sheet is greater than the curvature of the inner cylinder. , the convex surface of the arc-shaped support piece protrudes from the circumferential outer surface of the inner cylinder, the outer cylinder is arranged on the base and distributed on the outer side of the inner cylinder, a textile fabric conveying channel is formed between the outer cylinder and the inner cylinder, a through groove corresponding to the rectangular groove is provided on the outer cylinder, the first clamping and conveying assembly and the second clamping and conveying assembly are arranged on both sides of the rectangular groove, the first clamping and conveying assembly and the second clamping and conveying assembly both have a clamping and conveying channel, the clamping and conveying channel is connected with the textile fabric conveying channel, and each of the transmission components is spirally distributed on the textile fabric conveying channel from top to bottom;

[0009] The fabric inspection system includes a power supply, an image processor, a first industrial camera, a second industrial camera, a memory, an input device, a display, a wireless connection device and two strip-shaped LED light sources. The first drive motor, the second drive motor, the power supply, the first industrial camera, the second industrial camera, the memory, the input device, the display, the wireless connection device and the LED light source are electrically connected to the image processor respectively. The two LED light sources are arranged on the lateral sides of the rectangular groove to illuminate the textile fabric on the convex surface of the arc-shaped support piece. The first industrial camera is arranged on the concave side of the arc-shaped support piece to obtain a light image of the light emitted by the LED light source passing through the textile fabric. The second industrial camera is arranged on the convex side of the arc-shaped support piece to obtain an image of the textile fabric. When the real-time light image obtained by the first industrial camera is unqualified, the defect of the textile fabric is judged by the fabric image obtained by the second industrial camera.

[0010] Furthermore, a spacing is formed between the convex surface of the arc-shaped support plate and the two lateral sides of the rectangular groove. The cloth inspection system also includes a jet system, which has a nozzle. The nozzle is arranged at two spacings, and the high-pressure gas ejected from the nozzle acts on the textile fabric.

[0011] Furthermore, the lower guide assembly includes a rotating seat, two lower guides, an upper swivel, a lower swivel, two rocker arms, two support rods and two springs. The rotating seat is rotatably disposed on the lower end of the inner cylinder through a bearing. The two lower guides are disposed at the lower end of the rotating seat and are distributed on the same diameter of the rotating seat. The upper swivel and the lower swivel are rotatably disposed on the support rod. The upper end of the rocker arm is hinged to the upper swivel. The two support rods are respectively disposed at the lower end of the rocker arm and are respectively distributed on the circumferential sides of each lower guide. The two springs are respectively connected to the middle part of the rocker arm and the lower swivel.

[0012] Furthermore, the lower guide member is in a "V"-shaped structure, and the upper end of the lower guide member is connected to the rotating seat, so that a through hole is formed between the lower guide member and the rotating seat, and the lower end of the swing rod passes through the through hole.

[0013] Furthermore, a rounded corner structure is provided at the lower end of the lower guide member.

[0014] Furthermore, the first clamping and conveying assembly includes a first clamping roller, a second clamping roller, a third drive motor for driving the first clamping roller to rotate, and a fourth drive motor for driving the second clamping roller to rotate. The first clamping roller and the second clamping roller have the same rotation speed and opposite rotation directions. The second clamping and conveying assembly includes a third clamping roller, a fourth clamping roller, a fifth drive motor for driving the third clamping roller to rotate, and a sixth drive motor for driving the fourth clamping roller to rotate. The third clamping roller and the fourth clamping roller have the same rotation speed and opposite rotation directions.

[0015] Furthermore, the rotation speed of the first clamping roller is equal to the rotation speed of the third clamping roller.

[0016] Furthermore, the rotation speed of the first clamping roller is lower than the rotation speed of the third clamping roller.

[0017] Furthermore, the upper guide assembly includes a first upper guide member arranged at the upper end of the inner tube and a second upper guide member arranged at the upper end of the outer tube, and the first upper guide member and the second upper guide member are both annular structures.

[0018] A method for inspecting cloth, using the cloth inspecting device described above, comprises the following steps:

[0019] 1) Pre-storing standard light images of qualified textile fabrics, standard images of qualified textile fabrics, and images of textile fabrics of various defect types in a memory;

[0020] 2) Controlling the weaving mechanism to weave a textile fabric with a tubular structure, the textile fabric is guided and conveyed by the fabric conveying mechanism, and high-pressure gas is ejected through the nozzle to act on the textile fabric on the arc-shaped support sheet, and then the textile fabric is rotated and reeled by the pulling and winding mechanism, so that the textile fabric moves downward in a spiral in the fabric conveying mechanism, and the textile fabric forms a detection area on the arc-shaped support sheet. The detection area is a single detection unit. The detection area formed by one rotation of the pulling and winding mechanism is defined as a detection unit group, and the detection unit group is composed of multiple continuous detection units;

[0021] 3) The image processor obtains the conveying starting point, winding speed, rotation speed and circumference of the textile fabric and determines the boundary of each detection unit. When the detection unit coincides with the detection area, the first industrial camera and the second industrial camera are controlled to shoot. The first industrial camera obtains the light image of the light emitted by the LED light source passing through the textile fabric, and the second industrial camera obtains the textile fabric image, and stores the light image and the textile fabric image in the memory;

[0022] 4) The image processor retrieves the standard light image of the qualified textile fabric in the memory and the light image obtained by the first industrial camera, and compares the colorimetry between the standard light image and the light image to determine whether there are defects. When the colorimetry is consistent, the detection area is qualified, and the textile fabric image obtained by the second industrial camera in step 3) is deleted; when the colorimetry is inconsistent, the detection area is unqualified, and the image processor retrieves the standard image of the qualified textile fabric in the memory and the textile fabric image obtained by the second industrial camera, and compares the standard image with the textile fabric image to verify whether there are defects in the textile fabric image obtained by the second industrial camera in step 3). When there are no defects, the textile fabric image obtained by the second industrial camera in step 3) is deleted. When there are defects, the image processor retrieves the textile fabric images of various defect types in the memory and compares them one by one with the textile fabric image to determine the defect type and mark it in the detection unit;

[0023] 5) When it is determined in step 4) that a defect exists, it is displayed on the display, and at the same time, the textile fabric image, defect type and defect level acquired by the second industrial camera are remotely transmitted to the operator's mobile device for viewing through a wireless connection device.

[0024] By adopting the above-mentioned technical scheme, the beneficial effects of the present invention are as follows: in the large circular knitting machine cloth inspection device and the cloth inspection method thereof, the first driving motor drives the weaving mechanism to move through the first transmission mechanism to realize the weaving of the fabric, and the woven fabric forms a tubular structure, which is then guided and transported by the fabric conveying mechanism, and the tension of the textile fabric is realized at the same time, and finally the textile fabric is rotated and wound up by the pulling and winding mechanism, so that the textile fabric moves downward in a spiral in the fabric conveying mechanism, thereby avoiding the formation of texture on the textile fabric during the inspection process of the fabric inspection system, and improving the accuracy of the cloth inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a front view structural schematic diagram of an embodiment of the present invention;

[0026] Figure 2 1 is a front view structural schematic diagram of a fabric conveying mechanism in an embodiment of the present invention;

[0027] Figure 3 1 is a schematic diagram of a top view of the fabric conveying mechanism in an embodiment of the present invention;

[0028] Figure 4 1 is a front view structural schematic diagram of an inner cylinder in an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of the inner tube in the expanded state according to an embodiment of the present invention;

[0030] Figure 6 It is a schematic diagram of the three-dimensional structure of the inner cylinder and the lower guide assembly in an embodiment of the present invention;

[0031] Figure 7 It is a circuit module diagram of a fabric inspection system in an embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 1. Base; 2. Bracket; 3. Support rod; 4. Fabric inspection system; 5. Fabric conveying mechanism; 6. First drive motor; 7. Second drive motor; 8. First transmission mechanism; 9. Second transmission mechanism; 10. Yarn supply mechanism; 11. Weaving mechanism; 12. Pulling and winding mechanism;

[0034] 40. Nozzle; 41. Power supply; 42. Image processor; 43. First industrial camera; 44. Second industrial camera; 45. Memory; 46. Input device; 47. Display; 48. Wireless connection device; 49. LED light source;

[0035] 51. Inner cylinder; 52. Outer cylinder; 53. First clamping and conveying assembly; 54. Second clamping and conveying assembly; 55. Transmission assembly; 56. Upper guide assembly; 57. Lower guide assembly; 58. Arc-shaped support sheet; 59. Rectangular groove; 60. Fabric conveying channel; 61. Through groove; 62. Clamping and conveying channel; 63. Spacing;

[0036] 571, rotating seat; 572, lower guide; 573, upper swivel; 574, lower swivel; 575, swing rod; 576, support rod; 577, spring; 578, through hole; 579, rounded corner structure;

[0037] 531, first clamping roller; 532, second clamping roller; 533, third drive motor; 534, fourth drive motor; 541, third clamping roller; 542, fourth clamping roller; 543, fifth drive motor; 544, sixth drive motor; 561, first upper guide; 562, second upper guide. DETAILED DESCRIPTION

[0038] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0039] The embodiments of the present invention are:

[0040] refer to Figures 1 to 7As shown, a large circular knitting machine cloth inspection device includes a base 1, a bracket 2, a support rod 3, a cloth inspection system 4, a fabric conveying mechanism 5, a first drive motor 6, a second drive motor 7, a first transmission mechanism 8, a second transmission mechanism 9, a yarn supply mechanism 10, a weaving mechanism 11 and a pulling and winding mechanism 12, wherein the bracket 2 and the weaving mechanism 11 are both arranged at the upper end of the base 1, and the bracket 2 is distributed on the outside of the weaving mechanism 11, the first drive motor 6 drives the weaving mechanism 11 to move through the first transmission mechanism 8, the yarn supply mechanism 10 is arranged at the upper end of the bracket 2, the support rod 3 is arranged in the middle of the bracket 2, the pulling and winding mechanism 12 is arranged on the base 1 and is located at the lower side of the weaving mechanism 11, the second drive motor 7 drives the pulling and winding mechanism 12 to rotate through the second transmission mechanism 9, and the fabric conveying mechanism 5 is arranged between the weaving mechanism 11 and the pulling and winding mechanism 12;

[0041] The fabric conveying mechanism 5 includes an inner cylinder 51, an outer cylinder 52, a first clamping and conveying assembly 53, a second clamping and conveying assembly 54, four transmission assemblies 55, an upper guide assembly 56, a lower guide assembly 57 and an arc-shaped support piece 58. The inner cylinder 51 is arranged on the support rod 3. The circumferential outer surface of the inner cylinder 51 is provided with rectangular grooves 59 distributed along its axial direction. The arc-shaped support piece 58 is arranged on the support rod 3 and distributed at the rectangular grooves 59. The arc-shaped support piece 58 has a convex surface and a concave surface. The concave surface of the arc-shaped support piece 58 faces the central axis side of the inner cylinder 51. The arc-shaped support piece 58 is a transparent structure. The curvature of the arc-shaped support piece 58 is greater than the curvature of the inner cylinder 51. The convex surface of the arc-shaped support piece 58 protrudes from the circumferential outer surface of the inner cylinder 51. The outer cylinder 52 is arranged on the base 1 and distributed on the outer side of the inner cylinder 51. A textile fabric conveying channel 60 is formed between the outer cylinder 52 and the inner cylinder 51. A through groove 61 corresponding to the rectangular groove 59 is provided on the outer cylinder 52. The first clamping and conveying assembly 53 and the second clamping and conveying assembly 54 are arranged on both lateral sides of the rectangular groove 59. The first clamping and conveying assembly 53 and the second clamping and conveying assembly 54 both have a clamping and conveying channel 62, and the clamping and conveying channel 62 is connected to the textile fabric conveying channel 60. Each of the transmission assemblies 55 is distributed on the textile fabric conveying channel 60 in a spiral from top to bottom;

[0042] The fabric inspection system 4 includes a power supply 41, an image processor 42, a first industrial camera 43, a second industrial camera 44, a memory 45, an input device 46, a display 47, a wireless connection device 48 and two strip-shaped LED light sources 49. The first drive motor 6, the second drive motor 7, the power supply 41, the first industrial camera 43, the second industrial camera 44, the memory 45, the input device 46, the display 47, the wireless connection device 48 and the LED light source 49 are electrically connected to the image processor 42 respectively. The two LED light sources 49 are arranged on the lateral sides of the rectangular groove 59 to illuminate the textile fabric on the convex surface of the arc-shaped support piece 58. The first industrial camera 43 is arranged on the concave side of the arc-shaped support piece 58 to obtain the light image of the light emitted by the LED light source 49 passing through the textile fabric. The second industrial camera 44 is arranged on the convex side of the arc-shaped support piece 58 to obtain the image of the textile fabric. When the real-time light image obtained by the first industrial camera 43 is unqualified, the defect of the textile fabric is judged by the fabric image obtained by the second industrial camera 44.

[0043] In the fabric inspection device of the circular knitting machine, the first driving motor 6 drives the weaving mechanism 11 to move through the first transmission mechanism 8 to realize the weaving of the fabric, and the woven fabric forms a tubular structure, and then is guided and transported by the fabric conveying mechanism 5, and the tension of the textile fabric is realized at the same time, and finally the textile fabric is rotated and rolled up by the pulling and winding mechanism 12, so that the textile fabric moves spirally downward in the fabric conveying mechanism 5, so as to avoid the formation of texture of the textile fabric during the inspection process of the fabric inspection system 4, and improve the accuracy of the fabric inspection. Specifically, the textile fabric with a tubular structure is introduced into the textile fabric conveying channel 60 formed between the inner cylinder 51 and the outer cylinder 52 by the upper guide component 56, and is distributed on the textile fabric conveying channel 60 in a spiral from top to bottom through the transmission component 55, so as to realize the spiral guiding feeding effect of the textile fabric, and then is distributed on the lateral sides of the rectangular groove 59 through the first clamping and conveying component 53 and the second clamping and conveying component 54. , and the clamping and conveying channels 62 of the first clamping and conveying components 53 and the second clamping and conveying components 54 are connected to the textile fabric conveying channel 60 to realize auxiliary rotational conveying, and then the convex surface of the arc-shaped support piece 58 protrudes from the circumferential outer surface of the inner cylinder 51 to realize the tensioning of the textile fabric in this area, avoiding the formation of textures during the conveying process, facilitating the image acquisition of the first industrial camera 43 and the second industrial camera 44, and improving the accuracy of the acquired images, thereby improving the accuracy of cloth inspection, and at the same time, the light emitted by the LED light source 49 is irradiated on the textile fabric. Due to the winding and weaving of the yarns on the textile fabric, the arc-shaped support piece 58 is set so that after the textile fabric is tensioned, there are gaps between the yarns, and the winding and crossing of the yarns on the textile fabric form different light transmittances. The light emitted by the LED light source 49 can pass through the textile fabric and be acquired by the first industrial camera 43, so that the clarity of the light image is high.

[0044] Furthermore, a spacing 63 is formed between the convex surface of the arc-shaped support piece 58 and the two lateral sides of the rectangular groove 59. The cloth inspection system 4 also includes a jet system, and the jet system has a nozzle 40. Specifically, the jet system includes a pressure pump and a nozzle 40 connected to the pressure pump. The nozzle 40 is arranged at two spacings 63. The high-pressure gas sprayed by the nozzle 40 acts on the textile fabric, which can remove the cotton wool mixed in the gaps of the textile fabric and improve the accuracy of cloth inspection. The sprayed high-pressure gas acts on the arc-shaped support piece 58, and the airflow is guided along the convex surface of the arc-shaped support piece 58 and acts on the textile fabric, so that there is a tension force between the arc-shaped support piece 58 and the textile fabric. On the one hand, it can make the textile fabric tense, and on the other hand, it reduces the excessive fit of the textile fabric to the arc-shaped support piece 58 and reduces the yarn deformation of the textile fabric, thereby improving the accuracy of the acquired light image.

[0045] In addition, the lower guide assembly 57 includes a rotating seat 571, two lower guides 572, an upper rotating ring 573, a lower rotating ring 574, two rocker arms 575, two support rods 576 and two springs 577. The rotating seat 571 is rotatably disposed on the lower end of the inner cylinder 51 through a bearing. The two lower guides 572 are disposed at the lower end of the rotating seat 571 and are distributed on the same diameter of the rotating seat 571. The upper rotating ring 573 and the lower rotating ring 574 are rotatably disposed on the support rod 3. The upper end of the rocker arm 575 is hinged to the upper rotating ring 573. The two support rods 576 are respectively disposed at the lower end of the rocker arm 575 and are respectively distributed on the circumference of each lower guide 572. The two springs 577 are respectively connected to the middle part of the rocker arm 575 and the lower rotating ring 574. The lower guide 572 is in a "V"-shaped structure. The rotating seat 571 is connected so that a through hole 578 is formed between the lower guide 572 and the rotating seat 571, and the lower end of the rocker rod 575 passes through the through hole 578. The lower end of the lower guide 572 is provided with a chamfered structure 579, so that the textile fabric conveyed by the textile fabric conveying channel 60 is laterally stretched outward by the tubular structure, which is convenient for the stacking of the textile fabric and is wound up by the pulling and winding mechanism 12, so that the winding efficiency of the textile fabric is high and the winding effect is good. Specifically, the lower guide assembly 57 rotates with the textile fabric, and the textile fabric is laterally stretched out by the lower guide 572 and guided downward to shrink. At the same time, auxiliary folding, stretching and folding are achieved through the support rod 576 and the rocker rod 575, and the arranged spring 577 can achieve buffering when the textile fabric is over-tensioned during rotation, avoid the textile fabric from bursting, and improve the safety of winding.

[0046] In this embodiment, the first clamping and conveying assembly 53 includes a first clamping roller 531, a second clamping roller 532, a third drive motor 533 driving the first clamping roller 531 to rotate, and a fourth drive motor 534 driving the second clamping roller 532 to rotate. The first clamping roller 531 and the second clamping roller 532 have the same rotation speed and opposite rotation directions. The second clamping and conveying assembly 54 includes a third clamping roller 541, a fourth clamping roller 542, and a fifth drive motor 543 driving the third clamping roller 541 to rotate. And a sixth drive motor 544 that drives the fourth clamping roller 542 to rotate, the rotation speeds of the third clamping roller 541 and the fourth clamping roller 542 are equal, and the rotation directions are opposite, the rotation speed of the first clamping roller 531 is equal to the rotation speed of the third clamping roller 541, and the third drive motor 533, the fourth drive motor 534, the fifth drive motor 543 and the sixth drive motor 544 are respectively electrically connected to the image processor 42 to realize the clamping and conveying of the textile fabric, so that the textile fabric is flattened to avoid the generation of texture.

[0047] This embodiment discloses that: the rotation speed of the first clamping roller 531 is equal to the rotation speed of the third clamping roller 541. Of course, it can also be set as: the rotation speed of the first clamping roller 531 is less than the rotation speed of the third clamping roller 541, so that a speed difference is formed between the first clamping and conveying component 53 and the second clamping and conveying component 54, so that the textile fabric clamped therebetween is stretched, which can better enhance the light emitted by the LED light source 49 to pass through the textile fabric and be captured by the first industrial camera 43, so that the light image has high clarity.

[0048] Furthermore, the upper guide assembly 56 includes a first upper guide member 561 disposed at the upper end of the inner tube 51 and a second upper guide member 562 disposed at the upper end of the outer tube 52. The first upper guide member 561 and the second upper guide member 562 are both annular structures to facilitate the guiding of textile fabrics.

[0049] A method for inspecting cloth, using the cloth inspecting device described above, comprises the following steps:

[0050] 1) Pre-storing the standard light image of qualified textile fabrics, the standard image of qualified textile fabrics, and the images of textile fabrics of various defect types in the memory 45;

[0051] 2) Controlling the weaving mechanism 11 to weave a textile fabric with a tubular structure, the textile fabric is guided and conveyed by the fabric conveying mechanism 5, and the high-pressure gas is sprayed through the nozzle 40 to act on the textile fabric on the arc-shaped support sheet 58, and then the textile fabric is rotated and rolled up by the pulling and winding mechanism 12, so that the textile fabric moves downward in a spiral in the fabric conveying mechanism 5, and the textile fabric forms a detection area on the arc-shaped support sheet 58, and the detection area is a single detection unit. The detection area formed by the pulling and winding mechanism 12 rotating one circle is defined as a detection unit group, and the detection unit group is composed of a plurality of continuous detection units;

[0052] 3) The image processor 42 obtains the conveying starting point, winding speed, rotation speed and circumference of the textile fabric and determines the boundary of each detection unit. When the detection unit coincides with the detection area, the first industrial camera 43 and the second industrial camera 44 are controlled to shoot. The first industrial camera 43 obtains the light image of the light emitted by the LED light source 49 passing through the textile fabric, and the second industrial camera 44 obtains the textile fabric image, and stores the light image and the textile fabric image in the memory 45;

[0053] 4) The image processor 42 retrieves the standard light image of the qualified textile fabric in the memory 45 and the light image obtained by the first industrial camera 43, and compares the colorimetry between the standard light image and the light image to determine whether there are defects. When the colorimetry is consistent, the detection area is qualified, and the textile fabric image obtained by the second industrial camera 44 in step 3) is deleted; when the colorimetry is inconsistent, the detection area is unqualified, and the image processor 42 retrieves the standard image of the qualified textile fabric in the memory 45 and the textile fabric image obtained by the second industrial camera 44, and compares the standard image with the textile fabric image to verify whether there are defects in the textile fabric image obtained by the second industrial camera 44 in step 3). When there are no defects, the textile fabric image obtained by the second industrial camera 44 in step 3) is deleted. When there are defects, the image processor 42 retrieves the textile fabric images of various defect types in the memory 45 and compares them one by one with the textile fabric images to determine the defect type and mark it in the detection unit;

[0054] 5) When a defect is determined in step 4), it is displayed on the display 47, and the textile fabric image, defect type and defect level acquired by the second industrial camera 44 are remotely transmitted to the operator's mobile device for viewing through the wireless connection device 48.

[0055] Through the above-mentioned cloth inspection method, the colorimetric comparison is first performed between the standard light image and the light image obtained by the first industrial camera 43 to determine whether there are defects. When the colorimetric is inconsistent, the inspection area is unqualified. The image processor 42 retrieves the standard image of the qualified textile fabric in the memory 45 and the textile fabric image obtained by the second industrial camera 44, and compares the standard image with the textile fabric image to verify whether there are defects in the textile fabric image obtained by the second industrial camera 44 in step 3). When defects exist, the image processor 42 retrieves the textile fabric images of various defect types in the memory 45 and compares them with the textile fabric image one by one to determine the defect type and mark it in the inspection unit. Cloth inspection is performed in two ways to improve the accuracy of cloth inspection, and the colorimetric comparison between the standard light image and the light image obtained by the first industrial camera 43 can improve the operating efficiency of the image processor 42, thereby improving the cloth inspection efficiency.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0059] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A circular knitting machine fabric inspection device, characterized in that: It includes a base, a bracket, a support rod, a cloth inspection system, a fabric conveying mechanism, a first driving motor, a second driving motor, a first transmission mechanism, a second transmission mechanism, a yarn supply mechanism, a weaving mechanism and a pulling and winding mechanism. The bracket and the weaving mechanism are both arranged at the upper end of the base, and the bracket is distributed on the outside of the weaving mechanism. The first driving motor drives the weaving mechanism to move through the first transmission mechanism. The yarn supply mechanism is arranged at the upper end of the bracket, the support rod is arranged in the middle of the bracket, the pulling and winding mechanism is arranged on the base and located at the lower side of the weaving mechanism, the second driving motor drives the pulling and winding mechanism to rotate through the second transmission mechanism, and the fabric conveying mechanism is arranged between the weaving mechanism and the pulling and winding mechanism. The fabric conveying mechanism comprises an inner cylinder, an outer cylinder, a first clamping and conveying assembly, a second clamping and conveying assembly, at least three transmission assemblies, an upper guide assembly, a lower guide assembly and an arc-shaped support sheet. The inner cylinder is arranged on a support rod. A rectangular groove distributed along its axial direction is provided on the circumferential outer surface of the inner cylinder. The arc-shaped support sheet is arranged on the support rod and distributed at the rectangular groove. The arc-shaped support sheet has a convex surface and a concave surface. The concave surface of the arc-shaped support sheet faces one side of the central axis of the inner cylinder. The arc-shaped support sheet is a transparent structure. The curvature of the arc-shaped support sheet is greater than the curvature of the inner cylinder. , the convex surface of the arc-shaped support piece protrudes from the circumferential outer surface of the inner cylinder, the outer cylinder is arranged on the base and distributed on the outer side of the inner cylinder, a textile fabric conveying channel is formed between the outer cylinder and the inner cylinder, a through groove corresponding to the rectangular groove is provided on the outer cylinder, the first clamping and conveying assembly and the second clamping and conveying assembly are arranged on both sides of the rectangular groove, the first clamping and conveying assembly and the second clamping and conveying assembly both have a clamping and conveying channel, the clamping and conveying channel is connected with the textile fabric conveying channel, and each of the transmission components is spirally distributed on the textile fabric conveying channel from top to bottom; The first clamping and conveying assembly includes a first clamping roller, a second clamping roller, a third drive motor for driving the first clamping roller to rotate, and a fourth drive motor for driving the second clamping roller to rotate, the first clamping roller and the second clamping roller have the same rotation speed and opposite rotation directions, the second clamping and conveying assembly includes a third clamping roller, a fourth clamping roller, a fifth drive motor for driving the third clamping roller to rotate, and a sixth drive motor for driving the fourth clamping roller to rotate, the third clamping roller and the fourth clamping roller have the same rotation speed and opposite rotation directions; A gap is formed between the convex surface of the arc-shaped support sheet and the two lateral sides of the rectangular groove. The cloth inspection system further comprises an air jet system, wherein the air jet system comprises a nozzle, and the nozzle is arranged at two gaps, and the high-pressure gas ejected from the nozzle acts on the textile fabric; The fabric inspection system includes a power supply, an image processor, a first industrial camera, a second industrial camera, a memory, an input device, a display, a wireless connection device and two strip-shaped LED light sources. The first drive motor, the second drive motor, the power supply, the first industrial camera, the second industrial camera, the memory, the input device, the display, the wireless connection device and the LED light source are electrically connected to the image processor respectively. The two LED light sources are arranged on the lateral sides of the rectangular groove to illuminate the textile fabric on the convex surface of the arc-shaped support piece. The first industrial camera is arranged on the concave side of the arc-shaped support piece to obtain a light image of the light emitted by the LED light source passing through the textile fabric. The second industrial camera is arranged on the convex side of the arc-shaped support piece to obtain an image of the textile fabric. When the real-time light image obtained by the first industrial camera is unqualified, the defect of the textile fabric is judged by the fabric image obtained by the second industrial camera.

2. The circular knitting machine fabric inspection device according to claim 1, characterized in that: The lower guide assembly includes a rotating seat, two lower guides, an upper swivel, a lower swivel, two rocker arms, two support rods and two springs. The rotating seat is rotatably disposed on the lower end of the inner cylinder through a bearing. The two lower guides are disposed at the lower end of the rotating seat and are distributed on the same diameter of the rotating seat. The upper swivel and the lower swivel are rotatably disposed on the support rod. The upper end of the rocker arm is hinged to the upper swivel. The two support rods are respectively disposed at the lower end of the rocker arm and are respectively distributed on the circumferential sides of each lower guide. The two springs are respectively connected to the middle part of the rocker arm and the lower swivel.

3. The circular knitting machine fabric inspection device according to claim 2, characterized in that: The lower guide member is in a "V"-shaped structure, and the upper end of the lower guide member is connected to the rotating seat, so that a through hole is formed between the lower guide member and the rotating seat, and the lower end of the swing rod passes through the through hole.

4. The circular knitting machine fabric inspection device according to claim 3, characterized in that: The lower end of the lower guide is provided with a rounded corner structure.

5. The circular knitting machine fabric inspection device according to claim 1, characterized in that: The rotation speed of the first clamping roller is equal to the rotation speed of the third clamping roller.

6. The circular knitting machine fabric inspection device according to claim 1, characterized in that: The rotation speed of the first clamping roller is lower than the rotation speed of the third clamping roller.

7. The circular knitting machine fabric inspection device according to claim 1, characterized in that: The upper guide assembly includes a first upper guide member arranged at the upper end of the inner cylinder and a second upper guide member arranged at the upper end of the outer cylinder, and the first upper guide member and the second upper guide member are both annular structures.

8. A method for inspecting cloth, using the cloth inspecting device according to claim 1, comprising the following steps: 1) Pre-storing standard light images of qualified textile fabrics, standard images of qualified textile fabrics, and images of textile fabrics of various defect types in a memory; 2) Controlling the weaving mechanism to weave a textile fabric with a tubular structure, the textile fabric is guided and conveyed by the fabric conveying mechanism, and high-pressure gas is ejected through the nozzle to act on the textile fabric on the arc-shaped support sheet, and then the textile fabric is rotated and reeled by the pulling and winding mechanism, so that the textile fabric moves downward in a spiral in the fabric conveying mechanism, and the textile fabric forms a detection area on the arc-shaped support sheet. The detection area is a single detection unit. The detection area formed by one rotation of the pulling and winding mechanism is defined as a detection unit group, and the detection unit group is composed of multiple continuous detection units; 3) The image processor obtains the conveying starting point, winding speed, rotation speed and circumference of the textile fabric and determines the boundary of each detection unit. When the detection unit coincides with the detection area, the first industrial camera and the second industrial camera are controlled to shoot. The first industrial camera obtains the light image of the light emitted by the LED light source passing through the textile fabric, and the second industrial camera obtains the textile fabric image, and stores the light image and the textile fabric image in the memory; 4) The image processor retrieves the standard light image of the qualified textile fabric in the memory and the light image obtained by the first industrial camera, and compares the colorimetry between the standard light image and the light image to determine whether there are defects. When the colorimetry is consistent, the detection area is qualified, and the textile fabric image obtained by the second industrial camera in step 3) is deleted; when the colorimetry is inconsistent, the detection area is unqualified, and the image processor retrieves the standard image of the qualified textile fabric in the memory and the textile fabric image obtained by the second industrial camera, and compares the standard image with the textile fabric image to verify whether there are defects in the textile fabric image obtained by the second industrial camera in step 3). When there are no defects, the textile fabric image obtained by the second industrial camera in step 3) is deleted. When there are defects, the image processor retrieves the textile fabric images of various defect types in the memory and compares them one by one with the textile fabric image to determine the defect type and mark it in the detection unit; 5) When a defect is determined to exist in step 4), it is displayed on the display, and the textile fabric image, defect type and defect level acquired by the second industrial camera are remotely transmitted to the operator's mobile device for viewing through a wireless connection device.

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