CN115639143A - Cloth detection device and method suitable for scutching cloth rolling machine - Google Patents

Abstract

A cloth detection device suitable for an open-width cloth winding machine, comprising: a frame, the frame is provided with a first rubber roller group and a second rubber roller group in parallel and at intervals, and one side of the second rubber roller group is provided with There is a cloth roll, and an image acquisition module is arranged between the first rubber roller group and the second rubber roller group. The image acquisition module includes a mounting base and at least two camera modules. The length direction of the mounting base is Basically parallel to the axial direction of the first rubber roller group, at least two camera modules are arranged along the length direction of the mounting seat, and the lens of the camera module faces the cloth for image acquisition; the beneficial effect of the present invention is that the first rubber roller group The transmission distance of the cloth and the second rubber roller group are set, and at least two camera modules arranged along the length direction of the mounting seat can not only monitor the production status of the cloth in real time, but also further improve the accuracy and comprehensiveness of the monitoring. It effectively reduces the labor intensity of workers and ensures the quality of products.

Description

A cloth detection device and method suitable for open-width cloth winding machines

technical field

The application relates to the field of textile machinery, in particular to a cloth detecting device and method suitable for an open-width cloth winding machine.

Background technique

The open-width cloth winding machine is a cloth rolling device applied to large circular knitting machines. The existing large circular knitting machines have relatively limited internal space. There are mainly two detection methods for the produced cloth, one of which is manual detection during the production process. That is to arrange personnel to check regularly with the naked eye. Another method is offline inspection, that is, after the cloth production is completed, an additional cloth inspection machine is used for inspection. There are deficiencies in the real-time performance of the machine, which often causes the problem of poor batch performance.

For this reason, the patent application publication number CN214572888U discloses a real-time collection and processing mechanism for cloth images based on a circular knitting machine, which is provided with a camera and a light source on the inner wall of the knitting round table to improve the real-time performance of cloth detection. However, when the camera detects, the cloth is wound on the cloth drum, and most of the cloth in the image captured by the camera is in a curved state, which is not conducive to the comparison between the real-time image and the template, and the position of the camera is relatively fixed. Flaws in areas far from the camera, such as edges, are difficult to detect and are prone to misjudgment. Therefore, the accuracy and comprehensiveness of detection need to be further improved.

In view of this, the present inventor has conducted in-depth research on the above-mentioned defects in the prior art, and thus this case arises.

Contents of the invention

The first purpose of the present application is to provide a cloth detection device suitable for open-width cloth winding machines. The cloth detection device has a simple structure and can complete the image detection of the front of the cloth while the cloth is being conveyed, effectively improving the accuracy of cloth detection. degree and comprehensiveness.

The second purpose of the present application is to provide a cloth detection device, which can complete the image detection of the front and back of the cloth while the cloth is being conveyed, further improving the comprehensiveness of cloth detection.

The third purpose of the present application is to provide a cloth detection method, through which the detection method cooperates with the corresponding detection device, can effectively detect the blemishes on the front of the cloth without missing detection.

The fourth object of the present application is to provide a cloth detection method, through which the detection method cooperates with the corresponding detection device, can effectively detect the blemishes on the front and back of the cloth without missing detection.

In order to achieve the first objective, the present invention discloses a cloth detection device suitable for open-width cloth winders, which rotates and operates on a large circular knitting machine, and includes: a frame, and the frame is provided with a first rubber roller group and a The second rubber roller group, one side of the second rubber roller group is provided with a cloth roll, the discharge end of the first rubber roller group corresponds to the feeding end of the second rubber roller group, and the second rubber roller group The discharge end of the roller set corresponds to the feed end of the cloth rolling roller, and an image acquisition module is arranged between the first rubber roller set and the second rubber roller set, and the image acquisition module includes a mounting seat and at least two A camera module, the length direction of the mounting base is basically parallel to the axial direction of the first rubber roller group, N camera modules are arranged along the length direction of the mounting base, N is a positive integer greater than or equal to 2, and the lens of the camera module is oriented toward The cloth is used for image acquisition, at least ensuring that the effective viewing areas collected by the lenses of the N camera modules can be seamlessly connected to each other and can completely cover the width of the cloth. A control system is connected, and the control system is used to receive the real-time image information collected by the camera module, compare and analyze the real-time image information with the preset qualified template, and send a feedback command to the outside once the analysis result is unqualified.

Further, the distance between the discharge end of the first rubber roller group and the feed end of the second rubber roller group is the transmission distance, and the lens of the camera module is arranged above the direction perpendicular to the front of the cloth.

Further, the camera module is provided with a plurality of first light sources at the outer diameter end of the lens, and a light guide cover is added on the outer periphery of the first light source, and the side wall of the light guide cover is used to use the plurality of first light sources The light path of the light source is projected to the front of the lens of the camera module.

With the above-mentioned structure, at least two camera modules are arranged along the length direction of the mounting seat. On the one hand, at least part of the camera modules can accurately cover the two edges of the cloth width direction, so that the detection is more comprehensive. On the other hand, each The image captured by the camera module can highlight the local details of the cloth, that is, the detection accuracy is higher.

In order to achieve the second purpose, the present invention discloses a cloth detection device suitable for an open-width cloth winder, the cloth detection device is based on the first purpose cloth detection device, and the image acquisition module further includes a light-shielding member, It is arranged on the frame and is located on the side of the tension section away from the camera module. The shading member has a shading main body that matches the width of the cloth, and the shading main body is arranged in parallel with the mounting seat. At least each of the camera modules The lens of the module corresponds to the shading subject in the corresponding position in the effective viewing area. The light-shielding body has a groove, and at least several second light sources are arranged in the groove, and the second light source is electrically connected to the control system, and is configured to assist the camera module in collecting images of the reverse side of the cloth.

With the above-mentioned structure, the shading member can effectively reduce the background noise of the front of the cloth collected by the camera module and improve the image contrast. Then, through the setting of the second light source, when the first light source is turned off, turning on the second light source can make the camera located on the front of the cloth The module is capable of image acquisition of the reverse side of the cloth.

In order to achieve the third purpose, the present invention discloses a cloth detection method suitable for an open-width cloth winder, which is applied to the cloth detection device for the first purpose, including the following steps:

S1: Within the scheduled running time T1, based on the preset running speed V of the cloth winding roller, the cloth is conveyed from the first rubber roller group to the second rubber roller group for a length of L1. When the camera module has the first light source, the second rubber roller group A light source is in a constant-on state, and the first light source is at least guaranteed to remain on when the lens is in a working state. The shooting waiting time T2 of the camera module is set by the control system, and the effective viewfinder areas of each of the camera modules are superimposed to form sub-stripes. Shaped collection image area, the parent strip-shaped collection image area jointly constructed by each sub-strip-shaped collection image area can fully cover the area of cloth sliding down L1 length;

S2: Send the real-time cloth image collected by the camera module to the control system;

S3: Based on the qualified template and threshold preset in the control system, analyze and compare with the real-time cloth image, calculate the similarity between the real-time cloth image and the qualified template, and compare the similarity with the threshold;

If the similarity is greater than the threshold, the real-time cloth image analysis result is qualified, and the cloth winding machine continues to run;

If the similarity is less than the threshold, the real-time cloth image analysis result is unqualified, and the cloth winding machine stops and alarms.

Using the above method, within the scheduled running time T1, the image area of the female bar-shaped collection collected by the camera module can cover the area of the length L1 of the cloth conveying, and can automatically and comprehensively complete the front detection of the cloth. When the detection is unqualified, the cloth rolling function Automatic alarm, which effectively reduces the labor intensity of workers and ensures the quality of products.

In order to achieve the fourth purpose, the present invention discloses a cloth detection method suitable for an open-width cloth winder, which is applied to the cloth detection device for the second purpose, including the following steps:

S1: Within the scheduled running time T1, based on the preset running speed V of the cloth winding roller, the cloth is conveyed from the first rubber roller group to the second rubber roller group for a length of L1. When the camera module has the first light source, its second When a light source is turned on, the second light source is turned off, and the effective viewfinder areas collected by the lenses of each camera module are superimposed on each other to form a forward strip-shaped collective image area; when the second light source is turned on, the first light source Closed, at this time the lens acquisition effective viewfinder areas of each camera module are superimposed on each other to form a reverse strip collection image area; wherein the overlapping part of the forward strip collection image area and the reverse strip collection image area is a sub-overlapping area S, The shooting waiting time T4 of the camera module is set by the control system, at least to ensure that the sub-overlapping area S can fully cover the area where the cloth slides down the length L1;

S2: Send the real-time cloth image collected by the camera module to the control system;

S3: Based on the qualified template and threshold preset in the control system, analyze and compare with the real-time cloth image, calculate the similarity between the real-time cloth image and the qualified template, and compare the similarity with the threshold;

If the similarity is greater than the threshold, the real-time cloth image analysis result is qualified, and the cloth winding machine continues to run;

If the similarity is less than the threshold, the real-time cloth image analysis result is unqualified, and the cloth winding machine stops and alarms.

Using the above method, within the scheduled running time T1, the sub-overlapping area S collected by the camera module can cover the area of the cloth conveying L1 length, and can automatically and comprehensively complete the detection of the front and back of the cloth. The cloth machine can automatically alarm, which effectively reduces the labor intensity of workers and ensures the quality of products.

Description of drawings

The specific description given as a non-limiting example to better explain what the application consists of and how it can be practiced, furthermore, the description refers to the accompanying drawings in which:

FIG. 1 is a schematic diagram of a three-dimensional structure of a cloth detection device provided by an embodiment of the present invention;

Fig. 2 is a side view structural schematic diagram of the cloth detection device provided by the embodiment of the present invention, in which the side plate of the frame is omitted, and the shading member is located at the first position;

Fig. 3 is a schematic diagram of the side view structure of the highlighted image acquisition module in Fig. 2;

4 is a schematic diagram of a partial three-dimensional structure of an image acquisition module provided by an embodiment of the present invention;

FIG. 5 is a schematic diagram of a three-dimensional structure of a shading member provided by an embodiment of the present invention;

Fig. 6 is a detailed view of the side panel part of the shade in Fig. 5;

Fig. 7 is a side view structural schematic diagram of the cloth detection device provided by the embodiment of the present invention, in which the side plate of the frame is omitted, and the shading member is located at the second position;

Fig. 8 is a schematic diagram of transformation between the first position and the second position of the shading member provided by the embodiment of the present invention;

9 is one of the three-dimensional structural schematic diagrams of the image detection module provided by the embodiment of the present invention when it is working;

Figure 10 is the second schematic diagram of the three-dimensional structure of the image detection module provided by the embodiment of the present invention when it is working, and the cloth is omitted in this figure;

Fig. 11a is a schematic diagram of a master strip-shaped set image area of a single photographing time period provided by an embodiment of the present invention;

Figure 11b is a schematic diagram of the coverage comparison between the mother strip-shaped collective image area and the cloth conveying width L2 area based on Figure 11a;

12 is a schematic diagram of the acquisition principle of the camera module provided by the embodiment of the present invention;

Fig. 13a-Fig. 13c are three kinds of positional relationships of the image areas of adjacent generatrix sets provided by the embodiment of the present invention;

Figures 14a-14c are schematic diagrams of the three states in which the sub-overlapping areas S are displayed separately in four consecutive photographing time periods provided by the embodiment of the present invention. Shooting waiting time T4 separate viewfinder;

Figures 15a-15c are schematic diagrams of the three states of sub-overlapping areas S combined and displayed in four consecutive photographing time periods provided by the embodiment of the present invention. Shooting waiting time T4 separate viewfinder;

Fig. 16 is a schematic diagram of the positional relationship between each forward strip collection image area and the reverse strip collection image area in the adjacent photographing time period provided by the embodiment of the present invention. At this time, the forward strip collection image area and the reverse strip collection image area The collection image regions are acquired continuously.

Label description:

1. Frame; 11. Rotating shaft; 12. Fastener; 13. First limiter; 14. Second limiter; 2. First rubber roller group; 3. Second rubber roller group; 4. Volume Cloth roller; 5. Image acquisition module; 51. Mounting base; 52. Camera module; 521. Lens; 522. First light source; 523. Light guide cover; Groove; 533, second light source; 534, side plate; 535, opening groove.

Detailed ways

The application will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

It is easy to understand that, according to the technical solution of the present application, those skilled in the art can propose various structural modes and implementation modes that can be replaced without changing the essence and spirit of the present application. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present application, and should not be regarded as the entirety of the present application or as a limitation or restriction on the technical solution of the present application.

The directional terms such as up, down, left, right, front, back, front, back, top, and bottom that are mentioned or may be mentioned in this specification are defined relative to the structures described in the drawings, and they are It is a relative concept, so it may change accordingly according to its different positions and different usage states. Accordingly, these or other directional terms should not be construed as limiting terms.

Embodiment one

Please refer to Fig. 1, a cloth detection device suitable for an open-width cloth winding machine provided by this embodiment is now described. The cloth winding machine is a cloth winding device that rotates on a large circular knitting machine, so the cloth detection device is synchronous It rotates with the winder and detects the cloth.

Please further refer to Figures 2-4, in this embodiment, the cloth detection device includes: a frame 1, the frame 1 is provided with a first rubber roller group 2 and a second rubber roller group 3 in parallel and at intervals, here Parallel spacing refers to the axial distance between the first rubber roller group 2 and the second rubber roller group 3 that is substantially parallel and separated by a predetermined length along a predetermined direction. Specifically, as shown in FIG. 3 , the first rubber roller group 2 and the second rubber roller group On the basis that the two rubber roller groups 3 are basically parallel in the axial direction, there are also spacings in the X direction and the Y direction respectively. One side of the second rubber roller group 3 is provided with a cloth rolling roller 4, and the first rubber roller group 3 The discharge end of the roller group 2 corresponds to the feed end of the second rubber roller group 3, and the discharge end of the second rubber roller group 3 corresponds to the feed end of the cloth rolling roller 4, that is, the cloth rolling path of the cloth. Traction by the first rubber roller group 2, then traction by the second rubber roller group 3, and finally to the cloth winding roller 4 for winding, the cloth winding roller 4 is arranged at the power output end of the cloth winding motor, through The winding traction of the cloth winding motor realizes the tensioning of the cloth.

An image acquisition module 5 is arranged between the first rubber roller group 2 and the second rubber roller group 3, and the image acquisition module 5 includes a mount 51 and at least two camera modules 52, and the length of the mount 51 is The direction is basically parallel to the axial direction of the first rubber roller group 2, and N camera modules 52 are arranged along the length direction of the mounting seat 51, where N is a positive integer greater than or equal to 2, and the lens 521 of the camera module 52 faces the cloth for image acquisition , at least ensure that the effective viewing areas collected by the lenses 521 of N camera modules 52 can be seamlessly connected to each other and can completely cover the width of the cloth. There is no gap between the effective framing areas of the collected cloth, that is, the edges of the effective framing areas of the cloth collected by the lenses 521 of the adjacent camera modules 52 can just coincide, or the effective framing of the cloth collected by the lenses 521 of the adjacent camera modules 52 respectively The regions can overlap each other, and the camera module 52 is electrically connected to a control system, and the control system is used to receive the real-time image information collected by the camera module 52, and compare and analyze the real-time image information with its preset qualified template, Once the analysis result is unqualified, send a feedback instruction to the outside. Among them, the fabric defect forms with unqualified results include: broken needles, oily yarns, oil stains, holes, horizontal stripes, etc. Specifically, broken needles refer to cracks along the warp direction on the fabric surface, generally at the end. A hole is formed. Oil stains refer to the black oil spots caused by the oil on the machine or dust floating in the air contaminating the cloth surface. Oil yarn refers to the oil or dirt on the original yarn, which will form a weft length on the cloth surface. Striped defects, holes mean that the yarn on the fabric surface is broken and there are holes, and horizontal stripes refer to some abnormal continuous horizontal cycles in circular knitted fabrics; here, the feedback command is sent out The object is the electrical device that needs to respond when the detection is unqualified, such as the alarm, the winding motor, etc. The feedback command includes but not limited to the start and stop signal of the electrical device, such as the alarm start signal and the winding motor stop signal.

It can be understood that cloth is the material used to make clothes. Clothes have an outer surface and an inner surface that is in contact with the human body. The outer surface of the clothes directly affects the perception of the viewer. Therefore, the outer surface has higher aesthetic requirements than the inner surface, that is, The control of defects is also more stringent. The front of the cloth mentioned in this embodiment all refers to the side of the cloth used as the outer surface of the clothes; further, the lens 521 of the camera module 52 is set in a direction perpendicular to the front of the cloth. The advantage that the lens 521 is vertically arranged on the cloth is that the image of the cloth entering the lens 521 will not be tilted at an angle, and the image taken by the camera module 52 can more restore the actual image, which is conducive to finding defects on the cloth.

In this embodiment, as shown in Figure 3, the distance between the discharge end of the first rubber roller group 2 and the feeding end of the second rubber roller group 3 is the transmission distance. In the prior art, based on the above two rubber rollers The group only plays the role of traction and guidance, so the transmission distance between the discharge end of the first rubber roller group 2 and the feeding end of the second rubber roller group 3 is generally relatively short, and in this case, due to the addition of the image acquisition module 5 , it is necessary to ensure that the cloth is transported from the discharge end of the first rubber roller group 2 to the feed end of the second rubber roller group 3 at a certain rate for a long enough time. In this long enough time, the camera module 52 can capture the The image of the cloth in a flat state, and because the image acquisition module 5 also occupies a certain space, the transmission distance between the discharge end of the first rubber roller group 2 and the feeding end of the second rubber roller group 3 needs to be properly adjusted. Large, it is convenient for the operator to wind the cloth from the first rubber roller group 2 to the second rubber roller group 3 for cloth winding operation.

Compared with the prior art, the cloth detection device provided in this embodiment has the transmission distance of the cloth set by the first rubber roller group 2 and the second rubber roller group 3, and at least two devices arranged along the length direction of the mounting seat 51 The camera module 52 enables the camera module 52 to capture continuous and flat images of the cloth surface while the cloth is being continuously conveyed, and can accurately cover both edges of the cloth in the width direction. It can not only monitor the production status of the cloth in real time, but also further Improve the accuracy and comprehensiveness of monitoring.

Referring to Fig. 2-3 again, the connection line between the cut surface of the discharge end of the first rubber roller group 2 and the cut surface of the feed end of the second rubber roller group 3 constructs the transmission cut surface, and the image acquisition module 5 is located between the transmission cut surface and the feed end of the second rubber roller group 3. Between the cloth winding rollers 4, it should be noted that the front of the cloth conveyed by the existing open-width cloth winding machine is facing the direction of the cloth winding roller 4, so the image acquisition module 5 is arranged on the inner side, which is also based on the Consideration of cloth front detection. In addition, the distance between the feeding end of the first rubber roller group 2 and the axis center of the cloth rolling roller 4 in the X direction will be smaller than the distance between the discharge end of the second rubber roller group 3 and the axis center of the cloth rolling roller 4 The spacing in the X direction can make the structure of the cloth detection device more compact while satisfying the front detection of the cloth.

As shown in Figure 4, in this embodiment, the camera module 52 is provided with a plurality of first light sources 522 at the outer diameter end of the lens 521, and the plurality of first light sources 522 can be arranged symmetrically around the axis of the lens 521, so The number of the first light source 522 can be at least three, such as 10-24, and a light guide cover 523 is added on the outer periphery of the first light source 522, and the light guide cover 523 covers the front end of the lens 521 to To prevent stray light from other positions from affecting the lens 521, the light guide cover 523 also has a side wall, and the side wall is used to project the light paths of several first light sources 522 directly in front of the lens 521 of the camera module 52, That is, the optical path of the first light source 522 covers the path area between the lens 521 and the cloth, adding a pure optical path to the lens 521, so that the lens 521 can obtain a clearer image of the cloth.

Please refer to Fig. 11a-Fig. 11b, Fig. 12 and Fig. 13a-Fig. 13c. This embodiment also provides a cloth detection method suitable for an open-width cloth winder, which is applied to the above cloth detection device, including the following steps:

S1: within the predetermined running time T1, based on the preset running speed V of the cloth winding roller 4, the cloth is conveyed from the first rubber roller group 2 to the second rubber roller group 3 for a length of L1, T1 and L1 in this embodiment For example, the predetermined running time T1 is one minute, and the length of the conveying L1 is 195 mm, but of course it is not limited thereto. At least ensure that the lens 521 is kept on when it is in the working state, and the shooting waiting time T2 of the camera module 52 is set by the control system. It can be understood that the shooting waiting time T2 is the time interval between adjacent shooting time periods of the camera module 52 ; During the photographing period, the effective viewfinder areas of each of the camera modules 52 are superimposed to form a sub-strip-shaped collection image area, and the mother-strip-shaped collection image area constructed jointly by each sub-strip-shaped collection image area can slide the cloth downwards The area of L1 length is fully covered;

S2: transmit the real-time cloth image collected by the camera module 52 to the control system;

The camera module 52 and the control system can realize data transmission through a dedicated data line, and the control system can be a host computer configured to process and display the image collection results, and output feedback to an external electrical device when the image detection fails. Command to stop the cloth winder.

S3: Based on the qualified template and threshold value preset in the control system, the qualified template refers to the normal production of flawless cloth image, and the threshold refers to the minimum similarity value of the qualified image, which is analyzed and compared with the real-time cloth image to calculate the real-time The similarity between the cloth image and the qualified template, and compare the similarity with the threshold;

If the similarity is greater than the threshold, the real-time cloth image analysis result is qualified, and the cloth winding machine continues to run;

If the similarity is less than the threshold, the real-time cloth image analysis result is unqualified, and the cloth winding machine stops and alarms.

By adopting the above-mentioned method, within the scheduled running time T1, the bus bar-shaped collective image area collected by the camera module 52 can cover the area of the length L1 of the cloth conveying, and can automatically and comprehensively complete the front detection of the cloth. When the detection is unqualified, roll the cloth The function automatically alarms, which effectively reduces the labor intensity of workers and ensures the quality of products.

The following mainly describes the S1 step in detail:

The working principle of the image acquisition module 5 is as follows. In the course of work, the camera module 52 is stationary, and the cloth is conveyed downward. In a single photographing period, the camera module 52 captures the female strip-shaped collection image area of the cloth as shown in the figure. As shown in 11a, in this embodiment, two camera modules 52 are taken as an example to explain. Of course, the number of camera modules 52 is not limited. In FIG. Roller group 3, cloth is arranged between the first rubber roller group 2 and the second rubber roller group 3, and the frame line in the middle of the cloth includes the sub-strip-shaped collection image area on the left and the sub-strip-shaped collection image area on the right, and the two sub-strips The sub-strip-shaped collection image area is formed by superimposing the effective viewfinder areas taken by two camera modules 52, and further, the sub-strip-shaped collection image area on the left and the right sub-strip-shaped collection image area are seamlessly connected and jointly formed The parent bar-shaped collective image area is defined, and the longitudinal length of the parent bar-shaped collective image area is the vertical detection distance H of the field of view of the camera module 52, and the vertical detection distance H of the visual field refers to the actual longitudinal length of the detection area in the field of view of the lens 521. The horizontal length of the collective image area is twice the vertical detection distance W of the field of view of the camera module 52. The horizontal detection distance W of the field of view refers to the actual horizontal length of the detection area in the field of view of the lens 521. The two horizontal detection distances W of the field of view jointly cover the cloth width. As shown in Figure 11b, the preset delivery length of the cloth in the single shooting waiting time T2 is L2, so as long as the mother bar-shaped collection image area can fully cover the area of the cloth sliding down the L2 length, there will be no missed detection Case.

Please refer to Fig. 13a-Fig. 13c. Fig. 13a-Fig. 13c show the schematic diagrams of the positional relationship of the parent strip-shaped collection image areas of adjacent photographing time periods. The image area of the bar-shaped set, the lower bar-shaped set image area is the image set collected in the previous shooting period and is represented by a solid line frame, and the upper bar-shaped set image area is the image set collected in the next shooting time period and is represented by a dotted line frame It means that according to the cooperation between the running speed V of the cloth winding roller 4 and the shooting waiting time T2, there are three kinds of positional relationships between the upper busbar-shaped collective image area and the lower busbar-shaped collective image area. In Fig. 13a, there is a gap between the lower boundary line of the upper busbar-shaped collection image area and the upper boundary line of the lower busbar-shaped collection image area, and the conveying length L2 of the cloth during the shooting waiting time T2 is greater than the vertical detection distance H of the visual field, and there is a gap. In Fig. 13b, the lower boundary line of the upper female strip-shaped collective image area coincides with the upper boundary line of the lower female strip-shaped collective image area, and there is no gap, and the conveying length L2 of the cloth during the shooting waiting time T2 is equal to the field of view Longitudinal detection distance H, that is, missed detection just cannot occur; in Fig. 13c, the lower boundary line of the upper female strip-shaped collection image area is lower than the upper boundary line of the lower female strip-shaped collection image area, and the upper female strip-shaped collection image area and the lower The image areas of the busbar-shaped set overlap with each other, and the conveying length L2 of the cloth during the shooting waiting time T2 is less than the longitudinal detection distance H of the field of view, that is, there will be no missed detection at all.

Further quantitatively analyze the running speed V of the cloth rolling roller 4 and the shooting waiting time T2. In step S1, the setting of the shooting waiting time T2 further includes:

The camera module 52 collection principle as shown in Figure 12, based on the working distance WD of the preset lens 521 and the cloth, the focal length f of the camera module 52, and the side length h of the camera module 52 chip target surface parallel to the cloth conveying direction, obtain Camera module 52 along the field of view longitudinal detection distance of cloth transmission direction H=h*WD/f, similarly also can obtain camera module 52 according to the side length w of the chip target surface of camera module 52 parallel to cloth width direction, obtain camera module 52 along the direction of cloth. The horizontal detection distance of the field of view in the width direction W=w*WD/f, of course the resolution of the camera module 52 should meet the shooting requirements, and will not be repeated here;

According to the above-mentioned three results, if missed inspections do not occur, then during a shooting waiting time T2 of the camera module 52, the conveying length L2 of the cloth should be equal to or less than the longitudinal detection distance H of the visual field. Similarly, the longitudinal detection distance H of the cloth through the visual field The waiting time for shooting is T3, and the shooting waiting time T2 should be less than or equal to T3, wherein the time for the cloth to pass through the vertical detection distance H of the field of view is T3, which can be understood as the cloth is conveyed at the running speed V, and the cloth to be detected is from the top of the field of view detection area of the lens 521 The time taken for the edge to reach the bottom edge of the field of view detection area, that is, when the stroke is the vertical field of view detection distance H, is T3. It should be noted that the photographing time period of the camera module 52 is very short. When the photographing time period is ignored, the photographing waiting time T2 can be regarded as equal to T3. That is, based on the preset operating speed V of the cloth winding roller 4 and the vertical detection distance H of the field of view of the camera module 52, the time T3=H/V for the cloth to pass through the vertical detection distance H of the field of view is acquired, then the shooting of the camera module 52 is waiting Time T2≤T3. And when T2=T3, under the condition that missed detection does not occur, the number of pictures taken by the camera module 52 can be kept to a minimum, which is beneficial to reduce the amount of data transmission and reduce the memory usage of the control system.

Taking the actual production parameters of the 96-channel circular knitting machine as an example, the existing circular knitting machine can rotate 13 times in one minute, and the length of the cloth woven by the large circular knitting machine is 15mm. The conveying length of the cloth is 15mm, then the preset running time T1 is one minute, the conveying length of the circular knitting machine cloth is L1=15*13=195mm, further the conveying rate of the cloth can be V=195/60=3.25 mm/s, preset camera module 52's field of view vertical detection distance H=80mm, obtain the time T3=H/V=80/3.25=24.6s for the cloth to pass through the field of view longitudinal detection distance H, then as long as the shooting time interval T2≤T1, That is, the detection of the front image of the cloth is completed, specifically, the shooting time interval T2=20s in this embodiment. In addition, it should be noted that the adjacent shooting waiting time T2 can be the same value, for example, both shooting waiting time T2 can be 20s, or different values, such as one shooting waiting time T2 is 10s, and the other shooting waiting time T2 is 20s, as long as at the preset running time T1, the image area of the female bar-shaped set can completely cover the area where the cloth slides down the length L1, there are no more restrictions here.

Embodiment two

The cloth detection device provided in this embodiment is further improved on the basis of the cloth detection device in Embodiment 1. The difference is that the image acquisition module 5 also includes a shading member 53, and the shading member 53 is provided with a device configured as The second light source 533 that assists the camera module 52 to collect images of the reverse side of the cloth. It should be noted that the cloth is formed by cross weaving of fabrics, and there are many small pores between the fabrics, which are not completely closed and opaque. Therefore, the physical background located on the back of the cloth will affect the front of the cloth collected by the camera module 52. The image is disturbed. In order to eliminate interference, a light-shielding member 53 is added. The light-shielding member 53 can be made of an opaque material such as a wood board or a metal plate, or has a light-absorbing coating such as a black coating. By setting the light-shielding member 53, it can be effectively reduced. Background noise improves the image contrast, making the image acquisition of the front of the cloth more accurate.

Please refer to Figures 5-8, specifically, the shading member 53 is arranged on the frame 1, and is arranged opposite to the lens 521 of each camera module 52, that is, the camera lens 521 of the camera module 52 and the shading member 53 are respectively located on the front and back of the cloth. On both sides of the reverse side, the shading member 53 has a shading main body 531 that matches the width of the cloth, and the shading main body 531 is arranged in parallel with the mounting seat 51, and at least the lens 521 of each camera module 52 corresponds to the effective viewing area memory The light-shielding main body 531 at the corresponding position. It can be understood that each camera module 52 is arranged along the length direction of the mounting seat 51, and the viewing areas of the camera modules 52 located at both ends of the mounting seat 51 respectively cover the edges in the width direction of the cloth, and there may be areas that do not belong to the cloth. Therefore, the effective viewfinder area refers to the viewfinder area corresponding to the cloth, and as long as the light-shielding main body 531 is set in the effective viewfinder area, it can play a role in enhancing the front detection of the cloth. Please refer to Fig. 5, Fig. 9 and Fig. 10, in this embodiment, the shading body 531 also has a groove 532, the cross section of the groove 532 is U-shaped, and at least several A second light source 533, several second light sources 533 can be arranged along the length direction of the groove 532, and several second light sources 533 can also be arranged along the width of the groove 532, the second light source 533 and the control The system is electrically connected, and is configured to assist the camera module 52 to collect images of the reverse side of the cloth. The first light source 522 is also electrically connected to the control system, and the control system controls the lighting strategy of the first light source 522 and the second light source 533 to realize The camera module 52 collects images of the front side of the cloth and the back side of the cloth.

When the camera module 52 is equipped with a first light source 522, when the first light source 522 is on, the second light source 533 is turned off, and the effective viewfinder areas collected by the lens 521 of each camera module 52 are superimposed on each other to form a forward strip-shaped collective image area; when the second light source 533 is lit, the first light source 522 is turned off, and the lens 521 of each camera module 52 collects the effective viewfinder area and the aggregate image area constructed by superimposing each other is a reverse strip aggregate image area; The overlapping part of the forward strip-shaped collection image area and the reverse strip-shaped collection image area is the sub-overlapping area S. The shooting waiting time T4 of the camera module 52 is set by the control system, and within the predetermined running time T1, at least the sub-overlapping The area S can fully cover the area where the cloth slides down the L1 length. For the setting of the shooting waiting time T4, please refer to the following description for details. To sum up, by setting the second light source 533 on the shading member 53, on the basic function of the camera module 52 to collect the front image of the cloth, the camera module 52 can also be provided with the reverse side of the cloth by cooperating with the first light source 522 and the second light source 533. The function of image acquisition greatly improves the comprehensiveness of cloth inspection and effectively reduces the probability of missed inspection.

When the detection of the cloth is not good, the cloth needs to be processed manually. In order to facilitate the operation of the staff, further, the shading member 53 is set to be in a position-adjustable flexible connection with the frame 1, at least when the shading member When 53 is in the first position, it is in the effective viewing area corresponding to the lens 521 of the camera module 52; The first rubber roller group 2 to the second rubber roller group 3 carry out the cloth loading operation. Wherein the first position refers to the working position of the shading member 53 when the image acquisition module 5 is in normal operation. At this time, the shading main body 531 is in the effective viewing area corresponding to the lens 521 of the camera module 52, and is basically parallel to the mounting seat 51. , the second position refers to the placement position of the shading member 53 during the manual cloth loading process when the image acquisition module 5 stops operating. inside for easy operation.

Specifically, the shading member 53 also includes two side plates 534, the shading main body 531 is arranged between the two side plates 534, and one end of the side plate 534 is connected to the machine frame 1 through the rotating shaft 11. The frame 1 is rotatably pivoted. In this embodiment, one end of the side plate 534 pivotally connected to the frame 1 is specifically the lower end of the side plate 534 . A connected opening groove 535, the opening portion on the light-shielding main body 531 is larger than the opening portion on the side plate 534, the frame 1 is provided with a fastener 12 through which the fastener 12 penetrates the opening groove 535, and The side plate 534 is pressed against the frame 1 so that the shade 53 is fixed at the first position. Wherein, the fastener 12 can be a locking screw threadedly connected with the frame 1, and the opening groove 535 is used for the fastener 12 to be released from the shade 53 during the rotation around the shaft 11. The opening on the main body 531 is used to give way to the head of the locking screw, and the opening on the side plate 534 is used to give way to the stem of the locking screw, so the opening on the light-shielding main body 531 is larger than The opening on the side plate 534 and the setting of the opening groove 535 make it unnecessary to remove the fastener 12 when the shade 53 is rotated, and only need to loosen the fastener 12, making the operation simple and convenient. Please refer to FIG. 8 , the frame 1 is also provided with a first limiting member 13 and a second limiting member 14 respectively. The two sides abut against each other to limit the position, so that the shading member 53 can switch between the first position and the second position with the rotating shaft 11 as the center of the rotating shaft 11 . The first limiter 13 and the second limiter 14 are the first limiter screw and the second limiter screw affixed to the frame 1, and the rods of the limiter screws are threadedly connected with the frame 1, The head of the limiting screw is configured to abut against the side plate 534 . When the shade 53 is to be rotated from the first position to the second position, it is only necessary to unscrew the fastener 12 and rotate the shade 53 so that the shade 53 rotates around the shaft 11, and at the same time the locking screw is rotated out of the opening groove 535 until the shade is reached. When the side edge abuts against the head of the second limit screw, the position of the shading member 53 in the second position can be completed without other additional operations; when the shading member 53 is to be rotated from the second position to the first position, only It is necessary to rotate the shading member 53 so that the shading member 53 rotates around the shaft 11 until the side of the shading is against the head of the first limit screw to complete the preliminary limit, and at the same time the locking screw is turned into the opening groove 535, and then tightened to lock Screws are used to fasten the shade 53.

This embodiment also proposes a cloth detection method suitable for an open-width cloth winder, which is suitable for the above cloth detection device, including the following steps:

S1: within the scheduled running time T1, based on the preset running speed V of the cloth winding roller 4, the cloth is conveyed from the first rubber roller group 2 to the second rubber roller group 3 for a length of L1, when the camera module 52 has the first light source 522, when its first light source 522 was lit, the second light source 533 was turned off, and now the effective viewfinder areas collected by the lens 521 of each camera module 52 were superimposed to form a forward strip-shaped collective image area; when the second light source When 533 lights up, the first light source 522 is turned off. At this time, the lens 521 of each camera module 52 collects the effective viewfinder area and overlaps each other to form a reverse strip-shaped collection image area; wherein the forward strip-shaped collection image area and the reverse strip-shaped collection image area The overlapping part of the collective image area is the sub-overlapping area S, and the shooting waiting time T4 of the camera module 52 is set by the control system. It can be understood that the shooting waiting time T4 is the time interval between the adjacent shooting time periods of the camera module 52 , at least ensure that the sub-overlapping area S can fully cover the area where the cloth slides down the L1 length;

Further, there are two ways of framing the forward strip-shaped set image area and the reverse strip-shaped set image area, one of which is that the forward strip-shaped set image area and the reversed strip-shaped set image area are separated by interval shooting waiting time T4 For framing, the other is continuous acquisition of the forward strip-shaped collection image area and the reverse strip-shaped collection image area, and cyclic continuous acquisition after interval shooting and waiting time T4.

S2: transmit the real-time cloth image collected by the camera module 52 to the control system;

The camera module 52 and the control system can realize data transmission through a dedicated data line, and the control system can be a host computer configured to process and display the image collection results, and output feedback to an external electrical device when the image detection fails. Command to stop the cloth winder.

S3: Based on the qualified template and threshold value preset in the control system, the qualified template refers to the normal production of flawless cloth image, and the threshold refers to the minimum similarity value of the qualified image, which is analyzed and compared with the real-time cloth image to calculate the real-time The similarity between the cloth image and the qualified template, and compare the similarity with the threshold;

If the similarity is greater than the threshold, the real-time cloth image analysis result is qualified, and the cloth winding machine continues to run;

If the similarity is less than the threshold, the real-time cloth image analysis result is unqualified, and the cloth winding machine stops and alarms.

Using the above method, within the predetermined running time T1, the sub-overlapping area S collected by the camera module 52 can cover the area of the length L1 of the cloth conveying, and can automatically and comprehensively complete the detection of the front and back of the cloth. When the detection is unqualified, The cloth rolling function can automatically alarm, which effectively reduces the labor intensity of workers and ensures the quality of products.

The difference between the cloth detection method in this embodiment and the cloth detection method in Embodiment 1 is that the camera module 52 has collected images of the front and back sides of the cloth, so the acquisition strategies of the camera module 52 are different, and when the camera module 52 collects images of the back side of the cloth During collection, the lighting strategy of the first light source 522 and the second light source 533 is different from that when the camera module 52 collects the front image of the cloth.

Step S1 will be described below in conjunction with Fig. 14a-Fig. 14c, Fig. 15a-Fig. 15c and Fig. 16:

In the actual production scene, the camera module 52 is fixed, and the cloth is conveyed downward. For the convenience of analysis, it is assumed that the cloth is in a static state, and the camera module 52 is in an upward motion state accordingly. Taking two camera modules 52 as an example, within the predetermined running time T1, the speed at which the camera modules 52 move up is equivalent to the running speed V of the cloth winding roller 4, and the horizontal detection distance W and the visual field of view of the viewfinder unit of the preset image module are The vertical detection distance H, wherein the horizontal detection distance W of the field of view is the actual horizontal length of the detection area in the field of view of the lens 521, and the vertical detection distance H of the field of view is the actual longitudinal length of the detection area in the field of view of the lens 521.

The first way in step S1: the forward strip-shaped collection image area and the reverse strip-shaped collection image area are separated by interval shooting and waiting time T4, specifically, according to different running speeds V and shooting waiting times of cloth winding roller 4 Time T4, taking four consecutive photographing time periods as an example, three state illustrations of the sub-overlapping area S are given in Figure 14a-Figure 14c, each group of illustrations includes two columns of collective image areas, as shown in Figure 14a, Among them, the area with the solid line frame in the lower left corner and the left section line is the forward strip collection image area of the first photographing time period, and the area with the dotted line frame in the upper left corner and the right crosshatching is the image of the second photographing period The reverse bar collection image area, the area with the solid line frame in the lower right corner and the left hatching is taken from the forward bar collection image area in the third photographing period, and the area with the dotted line frame in the upper right corner and the right cross hatching is taken It is the reverse strip-shaped collection image area of the fourth photographing time period. In time sequence, the camera module 52 has successively passed through the first photographing time period, the second photographing time period, the third photographing time period and the fourth photographing time period, The above four photographing time periods are continuous photographing time periods, and adjacent photographing time periods are separated by a shooting waiting time T4, wherein the first photographing time period and the third photographing time period obtain the forward strip collection image area, that is, the cloth is photographed For the front image, the second photographing time period and the fourth photographing period obtain the reverse strip collection image area, that is, the image on the reverse side of the cloth, and the overlapping part of the forward strip collection image area and the reverse strip collection image area is the subsection. The overlapping area S is shown by the grid lines in the figure, that is, the area of the grid lines represents that the front and back sides of the cloth are photographed at the same time. In order to compare the coverage of the cloth more directly, Figure 14a-Figure 14c is divided into two columns, and the sub-overlapping area S only shows the sub-overlapping area S of the first photographing time period and the second photographing time period, and the third photographing time period With the sub-overlapping area S of the fourth photographing period, the sub-overlapping area S of the second photographing period and the third photographing period is not shown due to the relationship of splitting, and the sub-overlapping area S of the second photographing period and the third photographing period Please refer to the corresponding illustrations in Fig. 15a-Fig.

It can be understood that, after the shooting waiting time T4 is preset, the camera module 52 moves up by L3 stroke, and the stroke is compared with the vertical detection distance H of the field of view of the camera module 52 in the following three situations:

As shown in Figure 14a and Figure 15a, after two shooting waiting times T4, the camera module 52 moves up by 2*L3 strokes, where 2*L3>H, and the camera module 52 takes four pictures at this interval to obtain the sub-overlapping area In the image of S, there is a gap between the adjacent sub-overlapping regions S, and the part of the gap cannot fully detect the front and back of the cloth; that is, it will cause missed detection;

As shown in Figure 14b and Figure 15b, after two shooting waiting times T4, the camera module 52 moves up by 2*L3 strokes, where 2*L3=H, and the camera module 52 takes four pictures at this interval to obtain the sub-overlapping area In the image of S, if there is no gap between adjacent sub-overlapping areas S, then the sub-overlapping area S is just uninterrupted, so at the preset running time T1, as long as the sub-overlapping area S can slide the cloth down without interruption Move the area of L1 length for full coverage, and there will be no missed detection;

As shown in Figure 14c and Figure 15c, after two shooting waiting times T4, the camera module 52 moves up by 2*L3 strokes, where 2*L3<H, and the camera module 52 takes four pictures at this interval to obtain the sub-overlapping area In the image of S, there is further overlap between adjacent sub-overlapping regions S, that is, the density of the sub-overlapping regions S is higher, and no missed detection will occur.

To further quantify, the running speed V of the cloth rolling roller 4 and the shooting waiting time T4, in step S1, the setting of the shooting waiting time T4 further includes:

Figure 12 shows the shooting principle of the camera module 52, based on the working distance WD between the preset lens 521 and the cloth, the focal length f of the camera module 52, and the side length h of the chip target surface of the camera module 52 parallel to the cloth conveying direction, Obtain the longitudinal detection distance H=h*WD/f of the field of view of the camera module 52 along the cloth transmission direction. Similarly, the camera module 52 can also be acquired according to the side length w of the chip target surface of the camera module 52 parallel to the cloth width direction. The lateral detection distance of field of view in the cloth width direction W=w*WD/f;

According to the above three situations, if missed inspections do not occur, after two shooting waiting times T4, the conveying length of the cloth is 2*L3, which is equivalent to the upward movement of the camera module 52 in the above analysis, and should be equal to or less than the vertical direction of the field of view. Detection distance H. In the same way, based on the running speed V of the cloth rolling roller 4, the time for the cloth to pass through the longitudinal detection distance H of the field of view is T3, and the camera module 52 should complete at least two shooting waiting times T4. It should be noted that the camera module 52 The time period for taking pictures is very short. When the time period for taking pictures is ignored, the two waiting times for shooting T4 can be considered equal to T3. That is, based on the preset running speed V of the cloth winding roller 4, the longitudinal detection distance H of the field of view of the camera module 52, and the time T3=H/V for obtaining the longitudinal detection distance H of the cloth through the field of view, when the forward strip-shaped collection image area and When the reverse strip-shaped collective image area is acquired separately at intervals of the shooting waiting time T4, the shooting waiting time of the camera module 52 is T4≦T3/2. And when T4=T3/2, under the condition that missed detection does not occur, the number of pictures taken by the camera module 52 can be minimized, which is beneficial to reduce the transmission of data and the memory usage of the control system.

Taking the actual production parameters of the 96-channel circular knitting machine as an example, the existing circular knitting machine can rotate 13 times in one minute, and the length of the cloth woven by the large circular knitting machine is 15mm. The conveying length of the cloth is 15mm, then the preset running time T1 is one minute, the conveying length of the circular knitting machine cloth is L1=15*13=195mm, further the conveying rate of the cloth can be V=195/60= 3.25mm/s, preset camera module 52 visual field vertical detection distance H=80mm, obtain the time T3=H/V=80/3.25=24.6s for the cloth to pass through the visual field vertical detection distance 80mm, then as long as the shooting time interval T4≤T3 /2, that is, the detection of the front image of the cloth is completed, specifically, the shooting time interval T4=10s in this embodiment. In addition, it should be noted that the adjacent shooting waiting time T4 can be the same value, for example, both shooting waiting time T4 can be 10s, or different values, such as one shooting waiting time T4 is 10s, and the other shooting waiting time is 10s. T4 is 5s, as long as at the preset running time T1, the sub-overlapping area S can slide the cloth down the area of length L1 for full coverage, there are no more restrictions here.

As shown in Figure 16, within the shooting waiting time T4, the cloth moved down by L4 strokes, the second way in step S1: the forward strip-shaped collection image area and the reverse strip-shaped collection image area are continuously acquired, and then spaced apart After the shooting waiting time T4, the cycle is continuously acquired; that is, the camera module 52 takes pictures of the cloth front immediately after taking pictures of the front of the cloth in a single photographing time period, or immediately takes pictures of the cloth front in a single photographing time period after taking pictures of the cloth reverse side. Take pictures, so as to realize the continuous collection of the front and back of the cloth. Of course, after taking pictures of the front side of the cloth, Δt can also be set, and then take pictures of the back side of the cloth, wherein Δt is the delay time left for switching between the first light source 522 and the second light source 533, and the duration of Δt is also very short. Since the time taken to take pictures is very short, and the forward strip collection image area and the reverse strip collection image area are acquired continuously, the forward strip collection image area and the reverse strip collection image area basically overlap, that is, the forward strip collection image area The sub-overlapping area S area where the aggregated image area overlaps with the reverse strip-shaped aggregated image area can be considered to be similar to the area of the parent strip-shaped aggregated image area in Embodiment 1, so that the leak-proof detection principle of the detection method in this way and the embodiment The leak-proof detection principle of a detection method is similar, that is, during a shooting waiting time T4 of the camera module 52, the conveying length L4 of the cloth should be equal to or less than the vertical detection distance H of the field of view. Similarly, the time for the cloth to pass through the vertical detection distance H of the field of view is T3, shooting waiting time T4 should be less than or equal to T3. With reference to the detection method in Embodiment 1, based on the preset operating speed V of the cloth winding roller 4, the longitudinal detection distance H of the field of view of the camera module 52, the time T3=H/V for obtaining the longitudinal detection distance H of the cloth through the field of view, when When the forward strip-shaped collective image area and the reverse strip-shaped collective image area are acquired continuously, and are acquired cyclically and continuously after an interval of the shooting waiting time T4, the shooting waiting time of the camera module 52 is T4≤T3. For the specific process, please refer to Embodiment 1, which will not be repeated here.

The connection between the first method and the second method in step S1 is that both methods can effectively collect the front and back of the cloth without missing inspection; the first method in step S1 is compared with the first method The difference between the two methods is that in the first method, the forward strip-shaped collection image area and the reverse strip-shaped collection image area are collected at intervals of shooting time T4, so that the lights of the first light source 522 and the second light source 533 are switched on and off. There is more buffer time. In addition, when the first method is used to collect, the camera module 52 can only detect the front image of the cloth in the first photographing time period, so the part of the sub-overlapping area S is removed from the forward strip-shaped collection image area It is impossible to detect the reverse side of the cloth, and after the first photographing time period, under the condition that various parameters such as the operation speed V of the cloth winding roller 4 and the photographing waiting time T4 are matched, there will be no missed detection. In order to detect both the front and the back of the cloth at the same time in the first photographing period of the first method, you can set the turn-on standby time or slow start time of the fabric winder or combine the second method in the first photographing period, Combining the second method in the first photographing time period refers to that after directly and continuously acquiring the forward strip-shaped collective image area and the reverse strip-shaped collective image area in the first photographing time period, the camera module 52 starts to use the first way to run.

It should be understood that all the above preferred embodiments are illustrative rather than restrictive, and that those skilled in the art may make various modifications or variations to the specific embodiments described above under the concept of the application. within the scope of legal protection of this application.

Claims (14)

1. A cloth detection device suitable for open-width cloth winding machines, which rotates and operates on large circular knitting machines, and is characterized in that it includes: a frame (1), and the frame (1) is provided with first rubber rollers at intervals in parallel group (2) and the second rubber roller group (3), one side of the second rubber roller group (3) is provided with a cloth rolling roller (4), and the output of the first rubber roller group (2) end corresponds to the feed end of the second rubber roller group (3), the discharge end of the second rubber roller group (3) corresponds to the feed end of the cloth rolling roller (4), and the first rubber roller group ( 2) An image acquisition module (5) is arranged between the second rubber roller group (3), and the image acquisition module (5) includes a mount (51) and at least two camera modules (52), the installation The length direction of the seat (51) is basically parallel to the axial direction of the first rubber roller group (2), and N camera modules (52) are arranged along the length direction of the mounting seat (51), where N is a positive integer greater than or equal to 2, The lens (521) of the camera module (52) faces the cloth to collect images, at least ensuring that the effective viewing areas captured by the lenses (521) of N camera modules (52) can be seamlessly connected with each other and can completely cover the width of the cloth. Wide, the camera module (52) is electrically connected to a control system, the control system is used to receive the real-time image information collected by the camera module (52), and compare and analyze the real-time image information with its preset qualified template , once the analysis result is unqualified, send a feedback command to the outside. 2. A cloth detection device suitable for open-width cloth winding machines according to claim 1, characterized in that, the discharge end of the first rubber roller group (2) enters into the second rubber roller group (3) The distance between the material ends is the transmission distance, and the lens (521) of the camera module (52) is set above the direction perpendicular to the front of the cloth. 3. A cloth inspection device suitable for open-width cloth winding machines according to claim 2, characterized in that, the cutting surface of the discharge end of the first rubber roller group (2) is the same as that of the second rubber roller group (3) The connection between the cut surfaces at the feed end constructs the conveying cut surface, and the image acquisition module (5) is located between the conveying cut surface and the cloth winding roller (4). 4. A cloth inspection device suitable for open-width cloth winders according to claim 1, characterized in that, the camera module (52) is provided with several first light sources ( 522), and a light guide cover (523) is added on the outer periphery of the first light source (522), and the side wall of the light guide cover (523) is used to project the light paths of several first light sources (522) to The camera lens (521) of the camera module (52) is directly in front. 5. A cloth inspection device suitable for open-width cloth winders according to any one of claims 1-4, characterized in that, the image acquisition module (5) also includes a shading member (53), which Set on the frame (1) and located on the side of the tension section away from the camera module (52), the shading member (53) has a shading body (531) matching the width of the cloth, and the shading body ( 531) is arranged in parallel with the mounting seat (51), and at least the lens (521) of each camera module (52) has a corresponding light-shielding body (531) in the effective viewing area. 6. A cloth inspection device suitable for open-width cloth winders according to claim 5, characterized in that, the light-shielding main body (531) has a groove (532), and in the groove (532) at least A plurality of second light sources (533) are provided, the second light sources (533) are electrically connected to the control system, and are configured to assist the camera module (52) in collecting images of the reverse side of the cloth. 7. A cloth inspection device suitable for an open-width cloth winder according to claim 5 or 6, characterized in that, the shading member (53) is set to create a position between the frame (1) The adjusted movable connection, at least when the shading member (53) is in the first position, it is in the corresponding effective viewing area of the lens (521) of the camera module (52); when the shading member (53) is in the second position, it is from The lens (521) of the camera module (52) is moved away from the corresponding effective viewfinder area, so as to facilitate workers to carry out the cloth loading operation from the first rubber roller group (2) to the second rubber roller group (3). 8. A cloth inspection device suitable for open-width cloth winders according to claim 7, characterized in that, the shading member (53) also includes two side plates (534), and the two side plates (534 ) is provided with the shading main body (531), and one end of the side plate (534) is rotatably pivoted to the frame (1) through the rotating shaft (11) provided on the frame (1). A connecting opening groove (535) is provided at the adjacent part of the light-shielding main body (531) and the side plate (534), the opening on the light-shielding main body (531) is larger than the opening on the side plate (534), and the frame (1) is provided with a fastener (12), through which the fastener (12) penetrates the opening slot (535), and the side plate (534) is pressed against the frame (1), so as to realize the shading ( 53) is fixed in the first position. 9. A cloth detection device suitable for open-width cloth winding machines according to claim 8, characterized in that, the frame (1) is also provided with a first limiter (13) and a second limiter respectively. The limiter (14), the first limiter (13) and the second limiter (14) are respectively against the two sides of the side plate (534) to limit each other, so that the shading member (53 ) takes the rotating shaft (11) as the rotation axis, and switches between the first position and the second position. 10. A cloth detection method suitable for an open-width cloth winding machine, which is applied to the cloth detection device of the open-width cloth winding machine according to any one of claims 1-4, characterized in that it comprises the following steps: S1: Within the scheduled running time T1, based on the preset running speed V of the cloth winding roller (4), the cloth is conveyed from the first rubber roller group (2) to the second rubber roller group (3) for a length of L1. When the module (52) is equipped with the first light source (522), the first light source (522) is in a constant light state, and the first light source (522) at least ensures that the lens (521) is in the working state to maintain constant light, through the control system The shooting waiting time T2 of the camera module (52) is set, the effective viewfinder areas of each camera module (52) are superimposed on each other to form a sub-strip set image area, and the parent bar set jointly constructed by each sub-strip set image area The image area can fully cover the area where the cloth slides down the L1 length; S2: transmit the real-time cloth image collected by the camera module (52) to the control system; S3: Based on the qualified template and threshold preset in the control system, analyze and compare with the real-time cloth image, calculate the similarity between the real-time cloth image and the qualified template, and compare the similarity with the threshold; If the similarity is greater than the threshold, the real-time cloth image analysis result is qualified, and the cloth winding machine continues to run; If the similarity is less than the threshold, the real-time cloth image analysis result is unqualified, and the cloth winding machine stops and alarms. 11. A cloth inspection method suitable for open-width cloth winders as shown in claim 10, wherein the setting of the shooting waiting time T2 further comprises: Based on the preset operating speed V of the cloth rolling roller (4) and the longitudinal detection distance H of the field of view of the camera module (52), the time T3=H/V for the cloth to pass through the longitudinal detection distance H of the field of view is obtained, and the camera module (52 ) shooting waiting time T2≤T3. 12. A cloth detection method suitable for an open-width cloth winding machine, which is applied to the cloth detection device of the open-width cloth winding machine according to any one of claims 6-9, characterized in that it comprises the following steps: S1: Within the scheduled running time T1, based on the preset running speed V of the cloth winding roller (4), the cloth is conveyed from the first rubber roller group (2) to the second rubber roller group (3) for a length of L1. When the module (52) is equipped with a first light source (522), when the first light source (522) is on, the second light source (533) is off, and at this time the images collected by the lens (521) of each camera module (52) The effective framing areas are superimposed on each other to form a positive strip-shaped collective image area; when the second light source (533) is turned on, the first light source (522) is turned off, and at this time the lens (521) of each camera module (52) captures effectively The viewfinder areas are superimposed to form a reverse strip-shaped collection image area; the part where the forward strip-shaped collection image area and the reverse strip-shaped collection image area overlap is the sub-overlapping area S, and the camera module (52) is set by the control system. Shooting waiting time T4, at least ensure that the sub-overlapping area S can fully cover the area where the cloth slides down the length L1; S2: transmit the real-time cloth image collected by the camera module (52) to the control system; S3: Based on the qualified template and threshold preset in the control system, analyze and compare with the real-time cloth image, calculate the similarity between the real-time cloth image and the qualified template, and compare the similarity with the threshold; If the similarity is greater than the threshold, the real-time cloth image analysis result is qualified, and the cloth winding machine continues to run; If the similarity is less than the threshold, the real-time cloth image analysis result is unqualified, and the cloth winding machine stops and alarms. 13. A cloth detection method suitable for an open-width cloth winder as shown in claim 12, wherein the setting of the shooting waiting time T4 further comprises: Based on the preset running speed V of the cloth rolling roller (4) and the longitudinal detection distance H of the field of view of the camera module (52), the time T3=H/V for the cloth to pass through the longitudinal detection distance H of the field of view is acquired. When the image area and the reverse strip-shaped set image area are acquired separately at intervals of the shooting waiting time T4, the shooting waiting time of the camera module (52) is T4≤T3/2. 14. A cloth detection method suitable for an open-width cloth winder as shown in claim 12, wherein the setting of the shooting waiting time T4 further comprises: Based on the preset running speed V of the cloth rolling roller (4) and the longitudinal detection distance H of the field of view of the camera module (52), the time T3=H/V for the cloth to pass through the longitudinal detection distance H of the field of view is acquired. When the image area and the reverse strip-shaped set image area are acquired continuously, and are continuously acquired in a cycle after an interval of the shooting waiting time T4, the shooting waiting time of the camera module (52) is T4≤T3.

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