A base cloth finished product detection device

Abstract

The utility model provides a base cloth finished product detection device, including frame, platform, the front end and rear end of frame all are fixedly connected with platform, the upper side swing joint of frame front end platform has the unwinding roller, the upper side swing joint of frame rear end platform has the winding roller, the outer end fixed connection of winding roller has the sprocket, the side fixed connection of frame has the motor, the output fixed connection of motor has the sprocket, the linkage through chain between sprocket, the both ends of frame top surface, the middle part swing joint has the main guide roller, the utility model has the advantages of: when detecting different kinds of base cloth or aiming at different blemish, can switch the illumination mode. Camera gathers the image of same section base cloth under different light sources in the same position, can obtain the blemish information of much richer than single light source. Can improve the detection rate greatly, has significantly enhanced the detection ability to low contrast blemish and complex blemish, has reduced the missed detection rate.

Description

Technical Field

[0001] This utility model relates to the field of base fabric testing technology, and in particular to a base fabric finished product testing device. Background Technology

[0002] As a crucial intermediate product in the textile industry, the quality of base fabric directly impacts the performance of downstream finished products (such as composite materials, filter materials, and waterproof membranes). During base fabric production, various defects are inevitably generated due to factors such as raw materials, equipment, and processes, including warp breaks, weft breaks, holes, stains, and uneven density. These defects not only affect the product's appearance but also severely impair its mechanical properties, filtration accuracy, and other key indicators. Therefore, 100% online automated quality inspection of finished base fabrics is a necessary step to ensure product quality, improve product grade, and meet the demands of high-end applications.

[0003] Currently, automated optical inspection based on machine vision is the mainstream technology for base fabric quality inspection. Its basic principle is to acquire images of the moving base fabric surface using an industrial camera, and then identify and classify defects using image processing algorithms. In this system, the design of the lighting scheme is crucial, directly determining the image quality and the effectiveness of subsequent defect identification. Different defects, due to their different physical characteristics (such as unevenness, translucency, and fluorescence), require specific lighting conditions to be clearly highlighted.

[0004] Existing base fabric inspection devices typically employ a single or fixed illumination mode, such as single front illumination (e.g., ring light or strip light). While effective for certain high-contrast defects (e.g., large holes), they struggle to detect low-contrast defects (e.g., minor weft breaks), unevenness, or specific contaminants, resulting in a high false negative rate. Therefore, a finished base fabric inspection device is proposed to address these issues. Utility Model Content

[0005] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0006] Therefore, one objective of this utility model is to provide a base fabric finished product testing device to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.

[0007] To achieve the above objectives, one embodiment of the present invention provides a base fabric finished product testing device, including a frame and a platform. The front end and rear end of the frame are fixedly connected to the platform. An unwinding roller is movably connected above the front end platform of the frame, and a winding roller is movably connected above the rear end platform of the frame. A sprocket is fixedly connected to the outer end of the take-up roller, a motor is fixedly connected to the side of the frame, a sprocket is fixedly connected to the output end of the motor, and the sprockets are linked together by a chain. The top surface of the frame is movably connected to the two ends and the middle part of the main guide roller; An optical axis is fixedly connected to the center of the top surface of the frame, a slider is movably connected to the outer surface of the optical axis, a joint is fixedly connected to both sides of the slider, a secondary guide roller is movably connected to the bottom of the inner side of the joint, and the height of the slider on the optical axis is adjustable. A crossbeam is fixedly connected between the optical axes, and several industrial cameras are fixedly connected at intervals on the side of the crossbeam. The detection end of the industrial cameras faces downward, and an optical module is fixedly connected to the bottom surface of the crossbeam. The bottom surface of the optical module is stepped, and a grazing light source strip is fixedly connected to the bottom surface of the optical module. A bright light strip and an ultraviolet light strip are fixedly connected to the other bottom surface of the light module, and a backlight light strip is also fixedly connected to the inner side of the frame. The backlight light strip is located below the gap of the corresponding main roller.

[0008] Preferably, in any of the above embodiments, the frame is welded to the platform, and the main guide roller is located below the auxiliary guide roller.

[0009] The above technical solution involves installing an integrated lighting module (light module) on the existing camera beam, which incorporates multiple light sources. The bottom of the light module is stepped, with a grazing light strip fixedly connected to its bottom surface to highlight unevenness and defects such as warp or weft breaks. A bright light strip detects holes and density inconsistencies, while an ultraviolet light strip detects specific contaminants or fluorescent substances. A backlight strip is also fixedly connected inside the frame, located below the corresponding guide roller gap, to detect holes and density in the base fabric. The lighting mode can be switched when inspecting different types of base fabric or targeting different defects. The camera captures images of the same section of base fabric under different light sources at the same location, obtaining far more defect information than with a single light source. This significantly improves the detection rate, greatly enhances the detection capability for low-contrast and complex defects, and reduces the false negative rate. One device can complete inspection tasks that previously required multiple devices, thus increasing its value.

[0010] Preferably, in any of the above embodiments, the slider is threadedly connected to a fastening pin on its side, and the end of the fastening pin abuts against the surface of the optical axis.

[0011] Platforms are fixedly connected to both the front and rear ends of the frame. An unwinding roller is movably connected above the front platform, and a take-up roller is movably connected above the rear platform. At the start of testing, the finished roll of base fabric to be tested is placed on the unwinding roller. The base fabric unwinds from the unwinding roller and passes sequentially through the guide rollers movably connected at both ends and the middle of the top surface of the frame. The guide rollers guide the direction of the base fabric transport, ensuring its smooth and orderly movement within the testing area. The base fabric eventually winds onto the take-up roller, and after testing, it is wound up. A sprocket is fixedly connected to the outer end of the take-up roller, and a motor is fixedly connected to the side of the frame. A sprocket is also fixedly connected to the motor's output end, and the sprockets are linked by a chain. After the motor starts, the sprocket at its output end rotates, driving the sprocket at the outer end of the take-up roller to rotate via the chain, thus driving the take-up roller to rotate. The rotation of the take-up roller provides power for the transport of the base fabric, enabling the base fabric to continuously move from the unwinding roller to the take-up roller, achieving automated transport of the base fabric.

[0012] A light shaft is fixedly connected to the center of the top surface of the frame. A slider is movably connected to the outer surface of the light shaft. Connectors are fixedly connected to both sides of the slider, and a secondary guide roller is movably connected to the bottom of the inner side of each connector. The height of the slider on the light shaft is adjustable. A fastening pin is threaded onto the side of the slider. When adjusting the height of the secondary guide roller, first loosen the fastening pin to allow the slider to slide up and down on the light shaft, thereby moving the secondary guide roller up and down. Once the secondary guide roller reaches the appropriate height, tighten the fastening pin. The end of the fastening pin abuts against the surface of the light shaft, fixing the slider on the light shaft and thus fixing the position of the secondary guide roller. The main guide roller is located below the secondary guide roller. By adjusting the height of the secondary guide roller, the tension of the base fabric in the detection area can be adjusted to ensure the base fabric is in optimal detection condition.

[0013] A crossbeam is fixedly connected between the optical axes, with both ends of the crossbeam connected to the optical axes by screws, and the crossbeam is located below the slider. Several industrial cameras with a resolution of 2K are fixedly connected to the sides of the crossbeam at intervals, with their detection ends facing downwards. As the base fabric moves within the detection area, the industrial cameras capture images of the base fabric surface in real time, obtaining image information. The multiple industrial cameras spaced apart expand the detection range, ensuring complete coverage of the base fabric surface and improving detection accuracy.

[0014] Preferably, in any of the above embodiments, the two ends of the crossbeam are connected to the optical axis by screws, and the crossbeam is located below the slider.

[0015] Preferably, of any of the above solutions, the industrial camera has a resolution of 2K, and the optical module is connected to the bottom of the crossbeam by screws.

[0016] Preferably, in any of the above schemes, the grazing light source strip, the bright light strip, and the ultraviolet light strip are all irradiated downwards, while the backlight strip is irradiated upwards.

[0017] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows: This finished fabric inspection device integrates a multi-light source lighting module (light module) on the existing camera beam. The bottom of the light module is stepped, with a grazing light strip fixedly connected to its bottom surface to highlight unevenness defects such as warp or weft breaks. A bright light strip detects holes and density inconsistencies, while an ultraviolet light strip detects specific contaminants or fluorescent substances. A backlight strip is also fixedly connected inside the frame, located below the gap of the corresponding main roller, to detect holes and density inconsistencies in the fabric. The lighting mode can be switched when inspecting different types of fabric or targeting different defects. By capturing images of the same section of fabric under different light sources at the same location, the camera can obtain far richer defect information than with a single light source. This significantly improves the detection rate, greatly enhances the detection capability for low-contrast and complex defects, and reduces the false negative rate.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a first-view structural schematic diagram of the present invention; Figure 2 This is a structural schematic diagram of the present invention from a second perspective; Figure 3 This utility model Figure 2 Enlarged structural diagram at point A; Figure 4 This is a schematic diagram of the structure of the light source of this utility model.

[0020] In the diagram: 1-Frame, 2-Platform, 3-Unwinding roller, 4-Rewinding roller, 5-Sprocket, 6-Motor, 7-Main guide roller, 8-Optical axis, 9-Slider, 10-Joint, 11-Secondary guide roller, 12-Crossbeam, 13-Industrial camera, 14-Optical module, 15-Grazor light source bar, 16-Bright light bar, 17-Ultraviolet light bar, 18-Backlight light bar, 19-Fasting pin. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 according to the specific circumstances.

[0023] like Figure 1-4 As shown, the finished product testing device for this base fabric includes a frame 1 and a platform 2. The front and rear ends of the frame 1 are fixedly connected to the platform 2. The unwinding roller 3 is movably connected above the platform 2 at the front end of the frame 1, and the winding roller 4 is movably connected above the platform 2 at the rear end of the frame 1. A sprocket 5 is fixedly connected to the outer end of the take-up roller 4, a motor 6 is fixedly connected to the side of the frame 1, and a sprocket 5 is fixedly connected to the output end of the motor 6. The sprockets 5 are linked together by a chain. The top surface of the frame 1 is movably connected to the two ends and the middle of the main guide roller 7; A light axis 8 is fixedly connected to the middle of the top surface of the frame 1. A slider 9 is movably connected to the outer surface of the light axis 8. A connector 10 is fixedly connected to both sides of the slider 9. A secondary guide roller 11 is movably connected to the bottom of the inner side of the connector 10. The height of the slider 9 on the light axis 8 is adjustable. A crossbeam 12 is fixedly connected between the optical axes 8. Several industrial cameras 13 are fixedly connected at intervals on the side of the crossbeam 12. The detection end of the industrial camera 13 faces downward. An optical module 14 is fixedly connected to the bottom surface of the crossbeam 12. The bottom surface of the light module 14 is stepped, and a grazing light source strip 15 is fixedly connected to the bottom surface of the light module 14. Bright light strip 16 and ultraviolet light strip 17 are fixedly connected to the other bottom surface of the light module 14. Backlight light strip 18 is also fixedly connected to the inner side of the frame 1. The backlight light strip 18 is located below the gap of the corresponding main roller 7.

[0024] Example 1: The frame 1 is welded to the platform, and the main guide roller 7 is located below the auxiliary guide roller 11. A fastening pin 19 is threaded onto the side of the slider 9, with the end of the fastening pin 19 abutting the surface of the optical axis 8. Both ends of the crossbeam 12 are connected to the optical axis 8 by screws, and the crossbeam 12 is located below the slider 9. The industrial camera 13 has a resolution of 2K, and the optical module 14 is connected to the crossbeam 12 by screws. The grazing light strip 15, bright light strip 16, and ultraviolet light strip 17 all point downwards, while the backlight strip 18 points upwards.

[0025] Example 2: Platforms 2 are fixedly connected to both the front and rear ends of frame 1. An unwinding roller 3 is movably connected above the front platform 2 of frame 1, and a take-up roller 4 is movably connected above the rear platform 2 of frame 1. At the start of testing, the finished roll of base fabric to be tested is placed on the unwinding roller 3. The base fabric unwinds from the unwinding roller 3 and passes sequentially through the main guide rollers 7, which are movably connected at both ends and the middle of the top surface of frame 1. The main guide rollers 7 guide the direction of base fabric transport, ensuring that the base fabric moves smoothly and orderly within the testing area. The base fabric eventually winds onto the take-up roller 4, and after testing, it is wound up by the take-up roller 4. A sprocket 5 is fixedly connected to the outer end of the take-up roller 4. A motor 6 is fixedly connected to the side of frame 1, and a sprocket 5 is also fixedly connected to the output end of the motor 6. The sprockets 5 are linked together by a chain. After the motor 6 starts, the sprocket 5 at its output end rotates, driving the sprocket 5 at the outer end of the take-up roller 4 to rotate via the chain, thereby driving the take-up roller 4 to rotate. The rotation of the take-up roller 4 provides power for the conveying of the base fabric, enabling the base fabric to continuously move from the unwind roller 3 to the take-up roller 4, thus realizing the automated conveying of the base fabric.

[0026] A light shaft 8 is fixedly connected to the center of the top surface of the frame 1. A slider 9 is movably connected to the outer surface of the light shaft 8. Connectors 10 are fixedly connected to both sides of the slider 9. A secondary guide roller 11 is movably connected to the bottom of the inner side of the connector 10. The height of the slider 9 on the light shaft 8 is adjustable. A fastening pin 19 is threadedly connected to the side of the slider 9. When it is necessary to adjust the height of the secondary guide roller 11, the fastening pin 19 is first loosened, allowing the slider 9 to slide up and down on the light shaft 8, thereby driving the secondary guide roller 11 to move up and down. After the secondary guide roller 11 moves to the appropriate height, the fastening pin 19 is tightened. The end of the fastening pin 19 abuts against the surface of the light shaft 8, fixing the slider 9 on the light shaft 8, and thus fixing the position of the secondary guide roller 11. The main guide roller 7 is located below the secondary guide roller 11. By adjusting the height of the secondary guide roller 11, the tension of the base fabric in the detection area can be adjusted to ensure that the base fabric is in the optimal detection state.

[0027] A crossbeam 12 is fixedly connected to the optical axes 8. Both ends of the crossbeam 12 are connected to the optical axes 8 via screws, and the crossbeam 12 is located below the slider 9. Several industrial cameras 13 are fixedly connected at intervals to the sides of the crossbeam 12. Each industrial camera 13 has a 2K resolution and its detection end faces downwards. As the base fabric moves within the detection area, the industrial cameras 13 capture images of the base fabric surface in real time, obtaining image information. The multiple industrial cameras 13 spaced apart expand the detection range, ensuring comprehensive coverage of the base fabric surface and improving detection accuracy.

[0028] Example 3: Illumination section of the device: Light module 14: A light module 14 is fixedly connected to the bottom surface of the crossbeam 12, and the light module 14 is connected to the bottom of the crossbeam 12 by screws. The bottom surface of the light module 14 is stepped, which allows for the reasonable arrangement of different types of light sources to meet different detection needs.

[0029] Grazing light source strip 15: A grazing light source strip 15 is fixedly connected to the bottom surface of the light module 14, with its illumination direction facing downward. The grazing light source strip 15 illuminates the base fabric at an angle close to parallel to the base fabric surface, which can highlight the tiny imperfections and textures on the base fabric surface, making it easier for the industrial camera 13 to capture these details and improving the ability to detect tiny defects on the base fabric surface.

[0030] Bright light bar 16 and ultraviolet light bar 17: Bright light bar 16 and ultraviolet light bar 17 are fixedly connected to the other bottom surface of the light module 14, and their illumination direction is also downward. Bright light bar 16 provides uniform bright illumination, enabling the industrial camera 13 to clearly capture the overall condition of the base fabric surface; ultraviolet light bar 17 can excite certain special substances on the base fabric surface to emit fluorescence, which is used to detect whether there are specific pollutants or defects on the base fabric surface, such as fluorescent whitening agent residue.

[0031] Backlight strip 18: A backlight strip 18 is also fixedly connected to the inner side of the frame 1. The backlight strip 18 is located below the gap of the corresponding main guide roller 7, and its illumination direction is upward. The backlight strip 18 provides illumination from the back of the base fabric, so that the base fabric presents a clear image in the picture captured by the industrial camera 13, which is convenient for detecting defects such as thickness uniformity and holes in the base fabric.

[0032] The working principle of this utility model is as follows: Motor 6 drives take-up roller 4 to rotate, causing the base fabric to unwind from unwind roller 3 and pass sequentially through main guide roller 7 and auxiliary guide roller 11. During the base fabric conveying process, the position of auxiliary guide roller 11 is adjusted by adjusting the height of slider 9 on optical axis 8 to ensure the base fabric is in a suitable tension state. Simultaneously, grazing light strip 15, bright light strip 16, ultraviolet light strip 17, and backlight light strip 18 provide illumination to the base fabric from different angles. Industrial camera 13 acquires image information of the base fabric surface in real time and transmits the image data to the subsequent image processing system for analysis and judgment, thereby achieving quality inspection of the finished base fabric.

[0033] Compared with the prior art, the present invention has the following advantages: This finished fabric inspection device integrates a multi-source lighting module (light module 14) on the existing camera beam 12. The bottom of the light module 14 is stepped, with a grazing light strip 15 fixedly connected to its bottom surface to highlight unevenness defects such as warp or weft breaks. A bright light strip 16 detects holes and density inconsistencies, while an ultraviolet light strip 17 detects specific contaminants or fluorescent substances. A backlight strip 18 is also fixedly connected inside the frame 1, located below the gap of the corresponding main roller 7, to detect whether the fabric has holes or uneven density. The lighting mode can be switched when inspecting different types of fabric or targeting different defects. By capturing images of the same section of fabric under different light sources at the same location, the camera can obtain far richer defect information than with a single light source. This significantly improves the detection rate, enhances the detection capability for low-contrast and complex defects, and reduces the false negative rate. One set of equipment can complete the testing tasks that previously might have required multiple sets of equipment, thus increasing its value.

Claims

1. A device for testing finished base fabric, characterized in that, Includes a frame (1) and a platform (2). The front and rear ends of the frame (1) are fixedly connected to the platform (2). The unwinding roller (3) is movably connected above the front platform (2) of the frame (1), and the take-up roller (4) is movably connected above the rear platform (2) of the frame (1). The outer end of the take-up roller (4) is fixedly connected to a sprocket (5), the side of the frame (1) is fixedly connected to a motor (6), the output end of the motor (6) is fixedly connected to a sprocket (5), and the sprockets (5) are linked together by a chain. The top surface of the frame (1) is movably connected to the two ends and the middle of the main roller (7). A light axis (8) is fixedly connected to the middle of the top surface of the frame (1). A slider (9) is movably connected to the outer surface of the light axis (8). A connector (10) is fixedly connected to both sides of the slider (9). A secondary guide roller (11) is movably connected to the bottom of the inner side of the connector (10). The height of the slider (9) on the light axis (8) is adjustable. A crossbeam (12) is fixedly connected between the optical axes (8). Several industrial cameras (13) are fixedly connected at intervals on the side of the crossbeam (12). The detection end of the industrial camera (13) faces downward. An optical module (14) is fixedly connected to the bottom surface of the crossbeam (12). The bottom surface of the light module (14) is stepped, and a grazing light source strip (15) is fixedly connected to the bottom surface of the light module (14). A bright light strip (16) and an ultraviolet light strip (17) are fixedly connected to the other bottom surface of the light module (14), and a backlight light strip (18) is also fixedly connected to the inner side of the frame (1). The backlight light strip (18) is located below the gap of the corresponding main roller (7).

2. The base fabric finished product testing device as described in claim 1, characterized in that: The frame (1) is welded to the platform, and the main guide roller (7) is located below the auxiliary guide roller (11).

3. The base fabric finished product testing device as described in claim 2, characterized in that: The slider (9) is threadedly connected to a fastening pin (19) on its side, and the end of the fastening pin (19) abuts against the surface of the optical axis (8).

4. The base fabric finished product testing device as described in claim 3, characterized in that: The two ends of the crossbeam (12) are connected to the optical axis (8) by screws, and the crossbeam (12) is located below the slider (9).

5. The base fabric finished product testing device as described in claim 4, characterized in that: The industrial camera (13) has a resolution of 2K, and the optical module (14) is connected to the bottom of the crossbeam (12) by screws.

6. The base fabric finished product testing device as described in claim 5, characterized in that: The grazing light strip (15), bright light strip (16), and ultraviolet light strip (17) are all irradiated downwards, while the backlight strip (18) is irradiated upwards.

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