Intelligent cloth inspection machine tension control device

Abstract

The present invention discloses a tension control device for an intelligent cloth inspection machine, comprising a double-detection cloth inspection bracket for conveying cloth, wherein the double-detection cloth inspection bracket is provided with a cloth feed tension control section and a cloth outlet tension control section along the direction of the cloth, so as to keep the cloth feed tension and cloth outlet tension always consistent, and industrial cameras are provided above the double-detection cloth inspection bracket and on the cloth feed tension control section and the cloth outlet tension control section, respectively. The cloth between the cloth feed tension control section and the cloth outlet tension control section is connected and transmitted via a cloth guide roller. The present invention adopts an axial tension sensor to set a fixed tension value to achieve digital tension control, and can set different tension values ​​at any time to adapt to different cloths. At the same time, a servo motor is adopted, which, after receiving the tension feedback from the tension sensor, controls its rotation speed to achieve stable cloth tension, so as to ensure the smoothness of the cloth surface and the quality of camera shooting, thereby improving the level of detection.

Description

Technical Field

[0001] The present invention relates to the technical field of cloth inspection machines, and in particular to a tension control device for an intelligent cloth inspection machine. Background Art

[0002] China is the world's largest textile producer. According to data released by the National Bureau of Statistics, in the first half of 2020, large-scale printing and dyeing enterprises in China produced 21.995 billion meters of printed and dyed fabric, with a daily output of approximately 120 million meters. Fabric inspection is a crucial component of every link in the textile industry, encompassing weaving, printing and dyeing, garment manufacturing, and home textiles. Traditionally, textile companies have largely relied on manual inspection, relying on operators to visually detect defects on conventional inspection machines. This process suffers from low detection rates, slow speeds, and high labor intensity. The average speed for manual inspection is 15 meters per minute, and operators must maintain visual concentration for a maximum of 20-30 minutes. Anything above this speed and duration can lead to fatigue. The emergence of intelligent machine vision inspection machines overcomes some of these drawbacks and can effectively reduce labor costs. A single machine vision inspection machine can replace 3-5 traditional inspectors, with an average inspection speed of 40 meters per minute. The maximum recognition accuracy is 0.01mm, ten times that of manual inspection. Unaffected by human factors and emotions, it operates 24 / 7 and provides uninterrupted automatic inspection. The average detection rate exceeds 90%. Furthermore, the machine vision intelligent fabric inspection machine features open interfaces for rapid integration with production management systems such as ERP and MES. When connected in tandem with textile automation equipment such as automatic packaging machines, it forms an intelligent textile production line, creating a digital smart textile factory. Real-time inspection pages are available to monitor inspection status. This machine vision intelligent fabric inspection machine represents the future of fabric inspection machines.

[0003] A machine vision intelligent fabric inspection machine uses a high-precision industrial camera to continuously capture moving fabric. By comparing the images, it identifies defects and records them in a computer-based fabric inspection system. Because the industrial camera is fixed to a camera stand, it has certain requirements for the moving fabric during filming: the filming area must be flat and free of creases; the fabric must move at a constant speed without jitter; the fabric tension must be constant without variation; and the fabric must be centered without side-to-side movement.

[0004] This case was created to solve the above problems. Summary of the Invention

[0005] (1) Technical problems solved

[0006] In view of the deficiencies in the prior art, the present invention provides an intelligent tension control device for a fabric inspection machine, which solves the problems raised in the above-mentioned background technology.

[0007] (2) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: an intelligent cloth inspection machine tension control device, comprising a double-detection cloth inspection bracket for transmitting cloth, the double-detection cloth inspection bracket is respectively provided with a cloth feed tension control section and a cloth outlet tension control section along the cloth direction, so as to keep the cloth feed tension and cloth outlet tension always consistent, and industrial cameras are respectively provided above the double-detection cloth inspection bracket and on the cloth feed tension control section and the cloth outlet tension control section, the cloth between the cloth feed tension control section and the cloth outlet tension control section is connected and transmitted through a cloth guide roller, and a correction component is connected to the lower side of the cloth guide roller to actively apply lateral force to correct the cloth that deviates from the preset transmission direction.

[0009] Preferably, the cloth feeding tension control section includes a gear synchronous wheel as a transmission output end, which is driven by a servo motor. A transmission roller is provided on the side away from the gear synchronous wheel. The two are wrapped and closed by a right synchronous belt. A cloth inspection and cloth support rod is also provided along the direction of the cloth. The cloth is horizontally transmitted at the cloth inspection and cloth support rod, and the industrial camera is placed directly above it.

[0010] Preferably, the cloth-out tension control section includes a geared synchronous wheel located at the bottom as the transmission output end, a transmission roller and a geared synchronous wheel located at the top, and the three are closed by wrapping around a left synchronous belt. The transmission roller and the geared synchronous wheel are arranged flush in the horizontal direction, and another industrial camera is placed directly above the gap between the transmission roller and the geared synchronous wheel.

[0011] Preferably, the cloth inlet tension control section and the cloth outlet tension control section are respectively provided with tension guide rollers and equipped with axial tension sensors. The cloth is transmitted through the tension guide rollers, so that the cloth tension value of the section can be monitored in real time.

[0012] Preferably, the cloth inlet tension control section and the cloth outlet tension control section of the dual-detection cloth inspection bracket are respectively provided with tensioning blocks, and the inner end of the tensioning block is provided with a tensioning wheel, which is located on one side of the tension guide roller and presses against the left synchronous belt or the right synchronous belt.

[0013] Preferably, the deviation correction component includes supports located laterally on both sides below the cloth guide roller, and a rotating rod is provided in the two supports. The two ends of the rotating rod are respectively connected to a cloth rolling wheel, and the two cloth rolling wheels move laterally at the corresponding supports. An electromagnet is provided on the inner wall of the support, and a permanent magnet is provided on the outer edge of the cloth rolling wheel. When the electromagnet is energized, the cloth rolling wheel with the permanent magnet is pushed inward. The electromagnets on both sides act independently, and only one of them is energized.

[0014] Preferably, a horizontal section is provided in the support, and a downward inclined slope section is connected to the outer side of the horizontal section. Under normal circumstances, the two cloth-rolling wheels are placed at the end of the horizontal section, and fall on the slope section after moving outward. The cloth-rolling wheels that fall on the slope section do not conflict with the cloth above, and the cloth-rolling wheels that fall on the horizontal section are pressed against the cloth on the upper side.

[0015] (3) Beneficial effects

[0016] After adopting the above technical solution, the present invention has the following advantages compared with the prior art:

[0017] 1. The intelligent tension control device for the fabric inspection machine utilizes an advanced axial tension sensor to set a fixed tension value, achieving digital tension control. The tension values ​​in both the inlet and outlet tension control sections are identical, ensuring consistent tension across the entire camera capture area and a perfectly flat surface. This ensures consistent camera capture. Furthermore, the tension value can be adjusted to suit different fabrics, achieving particularly effective results for stretchy knitted fabrics.

[0018] 2. The tension control device for the intelligent fabric inspection machine utilizes a servo motor. After receiving tension feedback from the tension sensor, it controls the servo motor's speed to maintain stable fabric tension. The servo motor's speed controls the fabric tension, ensuring it remains constant at the set value. This ensures a smooth fabric surface and high-quality camera capture, thereby enhancing inspection capabilities.

[0019] 3. The tension control device for the intelligent fabric inspection machine of the present invention incorporates a deflection correction component within the infeed tension control section. An industrial camera located within this section detects fabric deflection and controls whether the deflection correction component is activated. Furthermore, an industrial camera located within the outfeed tension control section further detects and determines whether the deflection correction component has been activated. The deflection correction component has a simple structure and ingenious design. It seamlessly coordinates the infeed and outfeed tension control sections, and the industrial camera, achieving stable fabric tension control. Even if lateral deflection occurs during the fabric transmission process, the deflection correction component can be quickly and effectively implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a forward structural diagram of the present invention;

[0021] Figure 2 For the present invention Figure 1 Schematic diagram of the B-direction structure;

[0022] Figure 3 For the present invention Figure 2 Side elevation view at the center support.

[0023] In the figure: 1. Double-detection cloth inspection bracket; 2. L-shaped bearing seat; 3. Side fixing plate; 4. Drive roller; 5. Cloth guide roller; 6. Tension cloth guide roller; 7. Cloth inspection and support rod; 8. Gear synchronous wheel; 9. Tension mounting plate; 10. Tension mounting adapter plate; 11. Tensioning block; 12. Tensioning pulley; 13. Left synchronous belt; 14. Axial tension sensor; 15. Servo motor; 16. Planetary reducer; 17. Right synchronous belt; 18. Support; 19. Cloth rolling wheel; 20. Rotating rod; 21. Electromagnet; 22. Permanent magnet; 23. Slope section; 24. Horizontal section. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0025] like Figure 1-3 As shown: An intelligent cloth inspection machine tension control device includes a double-detection cloth inspection bracket 1 for conducting cloth, and the double-detection cloth inspection bracket 1 is provided with a cloth input tension control section and a cloth output tension control section along the direction of the cloth, as follows.

[0026] 1. The cloth inlet tension control section consists of a dual-detection cloth inspection bracket 1, cloth guide roller 5, tension mounting plate 9, cloth inspection support rod 7, side fixing plate 3, tension guide roller 6, drive roller 4, tensioning block 11, tensioning pulley 12, axial tension sensor 14, tension mounting adapter plate 10, right timing belt 17, geared synchronous pulley 8, servo motor 15, planetary reducer 16, and L-shaped bearing seat 2. A fixed tension value is set for the incoming cloth, and the speed of the servo motor 15 is used to adjust and track the set tension at any time to ensure that the tension is always maintained.

[0027] 2. The cloth delivery tension control section consists of a dual-detection cloth inspection bracket 1, a drive roller 4, a left synchronous belt 13, a gear synchronous wheel, a tensioning block 11, a tensioning wheel 12, a tension mounting plate 9, a tension mounting adapter plate 10, an axial tension sensor 14, a tension cloth guide roller 6, a servo motor 15, a planetary reducer 16, and an L-shaped bearing seat 2. The cloth delivery tension is set to the same value as the cloth delivery section, and the speed of the servo motor 15 is used to adjust and track the set tension at any time, so that the cloth delivery tension and the cloth delivery tension are always the same, and the cloth surface is always flat.

[0028] Above the dual-detection fabric inspection bracket 1, industrial cameras are located on both the inlet and outlet tension control sections. Fabric is connected and transferred between the inlet and outlet tension control sections via a fabric guide roller 5. The inlet tension control section includes a geared synchronous wheel 8 as the transmission output, driven by a servo motor 15. A drive roller 4 is located on the side away from the geared synchronous wheel. Both are enclosed by a right timing belt 17. A fabric inspection support rod 7 is also located along the fabric's path. Fabric is transported horizontally along this rod, with the industrial camera positioned directly above it. The outlet tension control section includes a geared synchronous wheel 8 as the transmission output, located below, and a drive roller 4 and geared synchronous wheel 8 located above. A left timing belt 13 encloses the three, with the drive roller 4 and geared synchronous wheel 8 positioned horizontally. Another industrial camera is positioned directly above the gap between the drive roller 4 and geared synchronous wheel 8.

[0029] The inlet and outlet tension control sections are each equipped with a tension guide roller 6 and an axial tension sensor 14. Fabric tension is transmitted through the tension guide roller 6, enabling real-time monitoring of the fabric tension in that section. The dual-detection fabric inspection bracket 1 is equipped with a tension block 11 on each of the inlet and outlet tension control sections. The inner end of the tension block 11 is equipped with a tension pulley 12. The tension pulley 12 is located on one side of the tension guide roller 6 and presses against the left or right timing belt 13 or 17.

[0030] A high-precision industrial camera continuously captures the moving fabric, comparing the images to identify defects and recording them in a computer-based fabric inspection system. The industrial camera uses conventional equipment and is not described in detail in this solution.

[0031] The technical solution overcomes the limitations of existing common cloth inspection machines. Compared with existing common cloth inspection machines, the technical solution adopted has the following effects:

[0032] 1. Utilizing an advanced axial tension sensor 14, a fixed tension value is set for digital tension control. The tension values ​​in both the infeed and outfeed tension control sections are identical, ensuring consistent tension across the entire fabric surface within the camera's capture area, ensuring a perfectly flat surface. This ensures optimal camera capture. Furthermore, the tension value can be adjusted at any time to suit the fabric type. This is particularly effective for stretchy knitted fabrics.

[0033] 2. As the fabric moves, tension can fluctuate. This is controlled by a servo motor 15. After receiving tension feedback from the tension sensor, the servo motor 15's speed is controlled to maintain stable fabric tension. When fabric tension is high, the servo motor 15 rotates more; when tension is low, it rotates less, ensuring that the fabric tension remains constant at the set value. This ensures a smooth fabric surface, enhances camera image quality, and improves inspection capabilities.

[0034] Furthermore, while tension is being controlled, the cloth guiding process can also cause lateral slippage between the rollers and wheels involved in the fabric guiding process. This can lead to a slight shift in the cloth's position, meaning the cloth will always move slightly left or right. As the deviation increases, problems such as cloth wrinkling and device jamming can occur.

[0035] Therefore, this solution addresses this issue by installing a web-correction component in the inlet tension control section. Furthermore, an industrial camera installed in the inlet tension control section can detect fabric deviation and control whether the web-correction component is activated. An industrial camera installed in the outlet tension control section can further detect and determine whether the problem has been resolved.

[0036] See attached Figure 2-3 Specifically, the correction component includes supports 18 located laterally on both sides below the cloth guide roller 5. A rotating rod 20 is provided in the two supports 18. The two ends of the rotating rod 20 are respectively connected to a cloth rolling wheel 19. The two cloth rolling wheels 19 move laterally at the corresponding supports 18. An electromagnet 21 is provided on the inner side wall of the support 18, and a permanent magnet 22 is provided on the outer edge of the cloth rolling wheel 19.

[0037] A horizontal section 24 is provided in the support 18, and the outer side of the horizontal section 24 is connected to a downwardly inclined slope section 23. Under normal circumstances, the two cloth-rolling wheels 19 are placed at the end of the horizontal section 24, and fall on the slope section 23 after moving outward. The cloth-rolling wheels 19 that fall on the slope section 23 do not conflict with the cloth above, and the cloth-rolling wheels 19 that fall on the horizontal section 24 are close to the cloth on the upper side.

[0038] The electromagnets 21 on either side act independently, with only one energized. When one of the electromagnets 21 is energized, it pushes the cloth-rolling wheel 19, which is equipped with a permanent magnet 22, inward, causing the other cloth-rolling wheel 19 to drop from the horizontal section 24 into the sloped section 23 and break away from contact with the upper fabric. Therefore, the deflected fabric can be driven by the cloth-rolling wheel 19 on the energized side of the electromagnet 21 to shift laterally to the other side, correcting the fabric deviation (when the fabric deviates to one side, the electromagnet 21 on that side is activated). After the deviation correction is completed, the two cloth-rolling wheels 19 are reset by intermittently energizing the electromagnets 21 on both sides. The entire deviation correction assembly has a simple structure and ingenious design. It can connect and coordinate with the infeed tension control section and the outfeed tension control section, and is highly compatible with the use of industrial cameras. While achieving tension maintenance control, it can also quickly complete the linkage correction operation even if the fabric moves left or right.

[0039] The above embodiments are for inspiration. Through the above description, relevant personnel can make various changes and modifications without departing from the scope of the invention. The technical scope of this new type of use is not limited to the content of the specification, and its protection scope must be determined according to the scope of the claims.

Claims

1. An intelligent tension control device for a fabric inspection machine, characterized by: The double-detection cloth inspection bracket is provided with a cloth-feeding tension control section and a cloth-outing tension control section along the direction of the cloth, so as to keep the cloth-feeding tension and the cloth-outing tension consistent at all times. An industrial camera is provided above the double-detection cloth inspection bracket and on the cloth-feeding tension control section and the cloth-outing tension control section respectively. The cloth between the cloth-feeding tension control section and the cloth-outing tension control section is connected and transmitted through a cloth guide roller. A deviation correction component is connected to the lower side of the cloth guide roller to actively apply a lateral force to correct the cloth that has deviated from the preset transmission direction. The deviation correction component includes supports that are laterally located on both sides below the cloth guide roller. The two supports A rotating rod is provided inside, and both ends of the rotating rod are respectively connected to a cloth-rolling wheel, and the two cloth-rolling wheels move laterally at the corresponding supports respectively, an electromagnet is provided on the inner side wall of the support, and a permanent magnet is provided on the outer edge of the cloth-rolling wheel. When the electromagnet is energized, the cloth-rolling wheel with the permanent magnet is pushed inward, and the electromagnets on both sides act separately, and only one of them is energized; a horizontal section is provided inside the support, and the outer side of the horizontal section is connected to a slope section inclined downward. Under normal circumstances, the two cloth-rolling wheels are placed at the end of the horizontal section, and fall on the slope section after moving outward. The cloth-rolling wheel that falls on the slope section does not conflict with the cloth above, and the cloth-rolling wheel that falls on the horizontal section presses against the cloth on the upper side; The cloth feeding tension control section includes a gear synchronous wheel as a transmission output end, which is driven by a servo motor. A transmission roller is provided on the side away from the gear synchronous wheel. The two are wrapped and closed by a right synchronous belt. A cloth inspection and support rod is also provided along the direction of the cloth. The cloth is horizontally transmitted at the cloth inspection and support rod, and an industrial camera is placed directly above it. The cloth-out tension control section includes a geared synchronous wheel located at the bottom and serving as the transmission output end, a transmission roller and a geared synchronous wheel located at the top, and the three are closed by a left synchronous belt. The transmission roller and the geared synchronous wheel are arranged flush in the horizontal direction, and another industrial camera is placed directly above the transmission roller and the geared synchronous wheel with a gap. The industrial camera provided at the cloth-in tension control section can detect whether the cloth is offset, and then control whether the deviation correction component is enabled, and the industrial camera provided at the cloth-out tension control section can further detect and determine whether the problem has been overcome.

2. The intelligent tension control device for a fabric inspection machine according to claim 1, characterized in that: The cloth inlet tension control section and the cloth outlet tension control section are respectively provided with tension guide rollers and equipped with axial tension sensors. The cloth is transmitted through the tension guide rollers, so that the cloth tension value of the section can be monitored in real time.

3. The intelligent tension control device for a fabric inspection machine according to claim 2, characterized in that: The cloth inlet tension control section and the cloth outlet tension control section of the dual-detection cloth inspection bracket are respectively provided with tensioning blocks, and the inner end of the tensioning block is provided with a tensioning wheel. The tensioning wheel is located on one side of the tension guide roller and presses against the left synchronous belt or the right synchronous belt.

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