A finished ud cloth impurity detection device

Abstract

This utility model relates to the field of UD fabric impurity detection technology, and in particular to a finished UD fabric impurity detection device; it includes a winding machine, with frames arranged on both sides in front of the winding machine's inlet, and a gantry support spanning across the frames. The gantry support is located in front of the winding machine's inlet, and several industrial cameras are mounted on the crossbeams of the gantry support for capturing images of the UD fabric surface; a parallel jet assembly is arranged along the running front of the UD fabric on the gantry support, and the jet assembly includes a connecting rod arranged along the width direction of the UD fabric, with a movable sleeve fitted on the connecting rod, and multiple sets of jet modules arranged in an axial array on the sleeve, each set of jet modules including a pressing jet nozzle and a repelling jet nozzle; the scientific spacing between the jet assembly and the imaging unit enables process coordination, and the directional slit airflow of the pressing jet nozzle and the diffusion air curtain of the repelling jet nozzle form a complementary function, fundamentally solving the problems of dynamic missed detection of suspended impurities and airborne insect intrusion.

Description

Technical Field

[0001] This utility model relates to the field of UD fabric impurity detection technology, and in particular to a device for detecting impurities in finished UD fabric. Background Technology

[0002] The finished UD fabric impurity detection device is an automated device used to monitor the cleanliness of the fabric surface in real time during the winding process. Its core functionality involves capturing images of the UD fabric surface using an industrial camera, and combining this with image processing algorithms to identify foreign objects such as small flying insects, hair, and dust. Once an impurity is detected, an alarm is triggered and the machine stops to prevent contaminants from being drawn into the finished fabric roll. This type of device aims to replace manual visual inspection, improving the quality stability and production efficiency of high-value-added UD fabrics, and is currently widely used in high-performance fiber fabric production lines.

[0003] Current UD fabric impurity detection devices generally employ planar vision inspection solutions. While these can identify visible impurities adhering to the fabric surface, they suffer from two major technical bottlenecks: First, the problem of missed detection of dynamically suspended impurities: During the high-speed winding of UD fabric, lightweight impurities, such as fluffy hair and tiny flying insects, are not fully attached due to friction, forming unstable micro-gaps with the fabric surface. During high-speed production line operation, these targets experience motion blur, glare interference, and attitude drift, leading to frequent missed detections by the planar imaging system. Some impurities even briefly detach from the fabric surface during camera sampling intervals, creating persistent blind spots. Second, the intrusion of aerial insects: The winding area generates localized heat islands due to equipment heating, coupled with volatile amines released from residual resin monomers, strongly attracting chemotactic flying insects. These insects hover in the 0-50cm airspace above the fabric surface, but the limitations of existing detection systems' two-dimensional field of view prevent them from capturing these targets. Even more serious is the negative pressure vortex created by the high-speed rotation of the winding machine, which forcibly draws insects into the gaps between fabric layers, ultimately engulfing them inside the finished product. Industry data shows that this type of "hidden contamination" accounts for more than 60% of downgraded UD fabrics, but existing technologies lack the ability to intercept it.

[0004] Therefore, this application provides a device for detecting impurities in finished UD fabric to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to provide a finished UD fabric impurity detection device to solve the problems of missed detection of lightweight impurities that are not fully attached during high-speed winding of existing detection devices, as well as contamination caused by flying insects entering the fabric roll from the airspace above the UD fabric.

[0006] To solve the above-mentioned technical problems, this utility model provides a finished UD fabric impurity detection device, including a winding machine, with frames set on both sides in front of the winding machine inlet, and a gantry support spanning across the frames on both sides. The gantry support is located in front of the winding machine inlet, and several industrial cameras are set on the crossbeam of the gantry support for taking images of the UD fabric surface.

[0007] A parallel jet assembly is installed along the front of the UD fabric on the gantry support. The jet assembly includes a connecting rod arranged along the width of the UD fabric, a movable sleeve fitted on the connecting rod, and multiple sets of jet modules arranged in an axial array on the sleeve. Each set of jet modules includes:

[0008] Press-fit air nozzle: Its outlet axis is vertically downward or forward inclined at 5-15°, the inclination direction is opposite to the running direction of UD fabric, and the outlet is a narrow slit flat structure with a slit width of 1-3mm;

[0009] Expulsion nozzle: It is connected to the pressure nozzle, and its outlet axis is inclined at 30-45° towards the running direction of UD fabric. The outlet is a conical diffusion structure with a diffusion angle ≥60°.

[0010] A further improvement of this utility model is that the pressing nozzle and the expulsion nozzle are connected to the same main air supply line through a Y-type splitter, a filter is connected in series on the main air supply line, and a pressure stabilizing air pump is installed at the inlet end of the main air supply line.

[0011] A further improvement of this utility model is that the diameter ratio of the pressing nozzle to the expulsion nozzle is 1:2 to 1:3, and the horizontal distance between the projection points of their airflow axes on the UD fabric surface is 10-20cm, forming a synergistic effect zone covering the UD fabric surface and the airspace above it.

[0012] A further improvement of this utility model is that the distance between the outlet of the press-fit jet nozzle and the UD fabric is 15-30cm, and the distance between the outlet of the expulsion jet nozzle and the UD fabric is 30-50cm.

[0013] A further improvement of this utility model is that: the distributor is fixed to the sleeve by a fixing rod, and the sleeve can rotate around the axis of the connecting rod to adjust the angle of the distributor; a first locking knob acting on the connecting rod is provided on the sleeve, and by rotating the first locking knob, the connecting rod is pressed against it to lock the angle.

[0014] A further improvement of this utility model is that: swing arms are respectively provided at both ends of the connecting rod, and the ends of the swing arms are connected to the mounting base on the frame through a rotating shaft. The height of the connecting rod can be adjusted by rotating the swing arms. A second locking knob is provided on the rotating shaft. By rotating the second locking knob, the pitch angle of the swing arms can be fixed to adjust the height of the connecting rod.

[0015] A further improvement of this utility model is that the vertical distance between the crossbeam and the connecting rod of the gantry support is 0.8-1.2m.

[0016] A further improvement of this utility model is that a light shield is provided on the outer side of the lens of the industrial camera, and a matte diffuse reflection coating is provided on the inner wall of the light shield.

[0017] By adopting the above technical solution, this utility model has the following beneficial effects:

[0018] 1. This utility model provides a finished UD fabric impurity detection device, which achieves precise control of dynamic contamination scenarios in high-speed winding production lines by setting up a pressing air nozzle and a repelling air nozzle of the air jet assembly: The pressing air nozzle acts on the fabric surface with a narrow airflow that is vertical or tilted forward at 5-15°, gently pressing and fixing light impurities such as fluffy hair and flying insects adhering to the UD fabric, eliminating their drift and shaking in the camera's field of view. The impurities are pressed into a stable and adhered state by the airflow, significantly reducing motion blur and reflection interference, and the industrial camera can clearly capture the target outline; The repelling air nozzle covers the 0-50cm airspace above the UD fabric with a 30-45° conical diffusion airflow, forming an oblique air curtain barrier, which strongly disperses flying insects attracted by heated volatiles.

[0019] 2. The present invention provides a finished UD fabric impurity detection device, which constructs an efficient and collaborative protection zone by optimizing the spatial parameters of the pressing and repelling air nozzles; the pressing air nozzle is 15-30cm away from the fabric surface to form close intervention, and the repelling air nozzle is 30-50cm away from the fabric surface to form a raised coverage area. The vertical difference between the two forms a double layer of protection for the fabric surface and the airspace; the airflow axis projection distance between the pressing air nozzle and the repelling air nozzle is 10-20cm, and with a pipe diameter ratio of 1:2 to 1:3, the pressing airflow stabilizes impurities while the repelling airflow simultaneously sweeps away flying insects above, and the two repel each other.

[0020] 3. The present invention provides a finished UD fabric impurity detection device, which improves production line compatibility through the rotation of the rod sleeve and the tilt adjustment mechanism of the swing arm; the rotation of the rod sleeve around the connecting rod adjusts the tilt angle of the jet assembly, which is quickly fixed by the first locking knob to match the airflow requirements under different winding speeds; the swing arm drives the jet assembly to rise and fall as a whole, and the position is locked by the second locking knob, which is suitable for the detection of the entire series of UD fabric rolls from thin UD fabric to thickened coating.

[0021] 4. The present invention provides a finished UD fabric impurity detection device, which significantly improves imaging reliability through the diffuse reflection coating design of the industrial camera lens hood; the matte diffuse reflection coating on the inner wall converts interference sources such as workshop ceiling lights and window light into uniform diffuse light, eliminating false impurity spots caused by fabric reflection; the airflow pre-cleaning of the jet nozzle reduces dust adhesion to the lens, and the lens hood physically isolates flying lint and oil mist, thus extending the maintenance-free cycle of the industrial camera in two ways. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of an overall device for detecting impurities in finished UD fabric.

[0024] Figure 2 This is a schematic diagram of an overall device for detecting impurities in finished UD fabric.

[0025] Figure 3 This is a schematic diagram of the structure of the gantry bracket and industrial camera of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the gantry bracket and industrial camera of this utility model;

[0027] Figure 5 This is a schematic diagram of the jet assembly of this utility model;

[0028] Figure 6 This is a schematic diagram of the jet assembly of this utility model;

[0029] Figure 7 for Figure 6 An enlarged schematic diagram of part A in the middle;

[0030] Figure 8 for Figure 6 Enlarged schematic diagram of part B.

[0031] Reference numerals: 1. Winding machine; 2. Frame; 3. Gantry support; 4. Crossbeam; 5. Industrial camera; 51. Sunshade; 6. UD fabric; 7. Air jet assembly; 71. Connecting rod; 72. Rod sleeve; 73. First locking knob; 74. Swing arm; 75. Mounting base; 76. Second locking knob; 77. Air jet module; 771. Pressing air nozzle; 772. Expulsion air nozzle; 773. Diverter; 774. Main air supply line; 775. Fixing rod. Detailed Implementation

[0032] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] The present invention will be further explained below with reference to specific embodiments.

[0036] like Figures 1-8 As shown, this embodiment provides a finished UD fabric impurity detection device, including a winding machine 1, which is existing technology, used to pull and wind the finished UD fabric 6. A frame 2 is fixedly installed on both sides in front of the inlet of the winding machine 1, providing a rigid support foundation for the entire device. A gantry support 3 spans across the frame 2 on both sides, its spatial position covering the key area of ​​the winding machine 1 inlet, forming a stable detection work area. Several industrial cameras 5 are installed on the crossbeam 4 of the gantry support 3 as core visual inspection devices. The industrial cameras 5 are existing technology, and their structure will not be described in detail in this utility model. A light shield 51 is added to the outside of the lens of the industrial camera 5. The specially made matte diffuse reflection coating on the inner wall of the light shield 51 can eliminate interference from ambient stray light reflection, significantly improving the image signal-to-noise ratio. The industrial cameras 5 are used to capture images of the surface of the UD fabric 6, capturing potential impurity targets. The winding machine 1 and the frame 2 constitute the power and support foundation, the gantry support 3 positions the detection space, and the industrial cameras 5, combined with the optical optimization design of the light shield 51, provide a guarantee for accurate imaging in high-speed environments, creating recognition conditions for subsequent air jet processing.

[0037] like Figures 1-4As shown, in this embodiment, a jet assembly 7 is arranged parallel to the front of the gantry support 3 along the running direction of the UD fabric 6. The vertical distance between the crossbeam 4 of the gantry support 3 and the connecting rod 71 in the jet assembly 7 is set to 0.8-1.2m to ensure the reasonable connection between the imaging and airflow intervention processes. The jet assembly 7 includes a connecting rod 71 arranged along the width direction of the UD fabric 6. A slidable sleeve 72 is fitted on the connecting rod 71. Multiple jet modules 77 are arranged in an axial array on the surface of the sleeve 72. Each jet module 77 includes a pressing jet nozzle 771 and a repelling jet nozzle 772. The outlet axis of the pressing jet nozzle 771 is vertically downward or tilted forward by 5-15°. Its slit-type flat structure can generate a uniform low-pressure airflow, stably pressing suspended impurities onto the fabric surface and eliminating motion blur. The repelling jet nozzle 772 is connected to the pressing jet nozzle 771. Its outlet axis is tilted backward by 30-45°. The conical diffusion structure forms a wide-area air curtain, effectively dispersing flying insects and stripping loose dust. The scientifically spaced jet assembly 7 and imaging unit enable process coordination. The directional slit airflow of the jet nozzle 771 and the diffusion air curtain of the jet nozzle 772 complement each other, solving the problem of dynamic missed detection of suspended impurities and airspace insect intrusion from the root.

[0038] like Figures 5-8 As shown, in this embodiment, the pressing nozzle 771 and the expulsion nozzle 772 are connected to the same main air supply line 774 via a Y-type splitter 773, which enables efficient airflow distribution. A filter is connected in series on the main air supply line 774 to intercept particles and prevent secondary pollution. A pressure-stabilizing air pump is installed at the inlet of the main air supply line 774 to maintain a constant pressure airflow output. Key spatial parameters include:

[0039] Pipe diameter ratio optimization: The pipe diameter ratio of the pressing air nozzle 771 to the expulsion air nozzle 772 is 1:2 to 1:3, ensuring that the pressing airflow is low-speed and gentle, and the expulsion airflow is high-speed and comprehensive.

[0040] Horizontal coordination spacing: The horizontal spacing between the projection points of the airflow axes of the two nozzles on the UD cloth 6 surface is 10-20cm to avoid airflow interference.

[0041] Vertical layered design: The outlet of jet nozzle 771 is 615-30cm away from the UD cloth for close operation, while the outlet of jet nozzle 772 is 630-50cm away from the UD cloth for airspace interception, forming a three-dimensional protection zone.

[0042] The integrated filtration and pressure stabilization air path system ensures clean and stable airflow. The parameters of pipe diameter ratio, horizontal spacing and vertical layering work together to efficiently integrate the impurity fixing function of the press-fit nozzle 771 and the airspace interception function of the expulsion nozzle 772, thus constructing a three-dimensional protection network.

[0043] like Figures 5-8As shown, in this embodiment, the distributor 773 is fixed to the sleeve 72 via a fixing rod 775. The sleeve 72 can rotate around the axis of the connecting rod 71 to adjust the nozzle tilt angle and adapt to different production line speeds. The first locking knob 73 on the sleeve 72 locks the angle by pressing against the connecting rod 71 to ensure operational stability. Swing arms 74 are provided at both ends of the connecting rod 71, and the ends of the swing arms 74 are connected to the mounting base 75 on the frame 2 via a rotating shaft. Rotating the swing arms 74 allows for overall adjustment of the height of the jet assembly 7 to adapt to changes in fabric roll thickness. The second locking knob 76 at the rotating shaft fixes the pitch angle of the swing arms 74 to maintain the set height. The rotation mechanism of the sleeve 72, in conjunction with the first locking knob 73, enables precise control of the jet assembly 7 angle, while the swing arms 74, combined with the second locking knob 76, allow for rapid height adaptation of the jet assembly 7. This dual adjustment mechanism significantly improves the compatibility and operational efficiency of the device for multiple production lines.

[0044] This utility model also provides the operating principle of a finished UD fabric impurity detection device:

[0045] The operator starts the winding machine 1 to pull the UD fabric 6. The fabric first enters the action area of ​​the jet assembly 7. The clean airflow delivered by the main air supply line 774 is distributed by the distributor 773. The pressing jet nozzle 771 uses vertical or forward-tilted slit airflow to press and fix the suspended impurities onto the fabric surface. At the same time, the expulsion jet nozzle 772 uses diffused airflow to form an oblique air curtain to disperse flying insects. The operator can adjust the height of the connecting rod 71 by swing arm 74 according to the thickness of the fabric roll and fix it to the mounting base 75 with the second locking knob 76, or rotate the rod sleeve 72 to adjust the nozzle angle and lock it with the first locking knob 73. The treated UD fabric 6 enters the area of ​​the gantry bracket 3. The industrial camera 5 on the crossbeam 4 shields the ambient light interference through the light shield 51 and performs high-definition imaging inspection on the fabric surface after the impurities are pressed.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for detecting impurities in finished UD fabric, characterized in that, Includes a winding machine (1), with frames (2) set on both sides in front of the entrance of the winding machine (1), and gantry supports (3) spanning across the frames (2) on both sides. The gantry supports (3) are located in front of the entrance of the winding machine (1), and several industrial cameras (5) are set on the crossbeam (4) of the gantry supports (3) for taking pictures of the surface of the UD fabric (6). A parallel jet assembly (7) is provided along the front of the UD fabric (6) of the gantry support (3). The jet assembly (7) includes a connecting rod (71) arranged along the width direction of the UD fabric (6). A movable sleeve (72) is fitted on the connecting rod (71). Multiple jet modules (77) are arranged in an axial array on the sleeve (72). Each jet module (77) includes: Press-fit nozzle (771): Its outlet axis is vertically downward or forward inclined at 5-15°, the inclination direction is opposite to the running direction of UD cloth (6), and the outlet is a slit-type flat structure with a slit width of 1-3mm; Expulsion nozzle (772): It is connected to the pressure nozzle (771), and its outlet axis is inclined at 30-45° towards the running direction of UD cloth (6). The outlet is a conical diffusion structure with a diffusion angle ≥60°.

2. The finished UD fabric impurity detection device according to claim 1, characterized in that, The press-fit nozzle (771) and the expulsion nozzle (772) are connected to the same main air supply line (774) through a Y-type splitter (773). A filter is connected in series on the main air supply line (774), and a pressure stabilizing pump is installed at the inlet end of the main air supply line (774).

3. The finished UD fabric impurity detection device according to claim 1, characterized in that, The diameter ratio of the press-fit nozzle (771) to the expulsion nozzle (772) is 1:2 to 1:3, and the horizontal distance between the projection points of their airflow axes on the surface of the UD cloth (6) is 10-20cm, forming a synergistic zone covering the surface of the UD cloth (6) and the airspace above it.

4. The finished UD fabric impurity detection device according to claim 1, characterized in that, The distance between the outlet of the press-fit nozzle (771) and the UD cloth (6) is 15-30cm, and the distance between the outlet of the expulsion nozzle (772) and the UD cloth (6) is 30-50cm.

5. The finished UD fabric impurity detection device according to claim 2, characterized in that, The diverter (773) is fixed to the sleeve (72) by a fixing rod (775). The sleeve (72) can rotate around the axis of the connecting rod (71) to adjust the angle of the diverter (773). A first locking knob (73) acting on the connecting rod (71) is provided on the sleeve (72). By rotating the first locking knob (73), the connecting rod (71) is pressed against it to lock the angle.

6. The finished UD fabric impurity detection device according to claim 1, characterized in that, A swing arm (74) is provided at both ends of the connecting rod (71). The end of the swing arm (74) is connected to the mounting base (75) on the frame (2) through a rotating shaft. The height of the connecting rod (71) can be adjusted by rotating the swing arm (74). A second locking knob (76) is provided on the rotating shaft. The pitch angle of the swing arm (74) is fixed by rotating the second locking knob (76) to adjust the height of the connecting rod (71).

7. The finished UD fabric impurity detection device according to claim 1, characterized in that, The vertical distance between the crossbeam (4) and the connecting rod (71) of the gantry support (3) is 0.8-1.2m.

8. The finished UD fabric impurity detection device according to claim 1, characterized in that, An industrial camera (5) has a lens hood (51) on the outside of its lens, and the inner wall of the lens hood (51) is provided with a matte diffuse reflection coating.

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