CN116124694A

CN116124694A - Cloth detection device and method suitable for open-width cloth winding machine

Info

Publication number: CN116124694A
Application number: CN202210872134.7A
Authority: CN
Inventors: 廖进成; 黄凯乾
Original assignee: Xiamen Xingquanlong Machinery Co ltd
Current assignee: Xiamen Xingquanlong Machinery Co ltd
Priority date: 2022-07-12
Filing date: 2022-07-22
Publication date: 2023-05-16
Also published as: WO2024012438A1; TW202403282A; CN117388167A; CN115639143A; CN115639147A

Abstract

Cloth detection device suitable for open width of cloth rolling machine, rotatory operation is in knitting circular knitting machine, which comprises a frame, frame parallel interval is provided with first rubber roll group and second rubber roll group, one side of second rubber roll group is equipped with the batching roller, be provided with the image acquisition module between first rubber roll group and the second rubber roll group, the image acquisition module includes the guide, the driving piece, the module of making a video recording, the guide includes guide rail and slider, the driving piece drives the slider forward or reverse sliding motion along the length direction of guide rail, the module of making a video recording sets up in the slider, its camera module's camera lens carries out image acquisition towards the cloth. The invention has the beneficial effects that the first rubber roller group and the second rubber roller group are provided with the transmission interval of the cloth and the sliding framing camera module, so that the continuous and smooth cloth cover image can be shot by the camera module in the reciprocating sliding process while the cloth is continuously conveyed, and the camera module can precisely cover the two edges of the cloth in the width direction of the cloth and is used for detecting the defects of the cloth.

Description

Cloth detection device and method suitable for open-width cloth winding machine

Technical Field

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

Background

The open width cloth rolling machine is a cloth rolling device applied to a knitting circular knitting machine, the inner space of the existing circular knitting machine is limited, the cloth detection mode of production is mainly two modes, wherein one mode is manual detection in the production process, namely, a worker checks the cloth with naked eyes at regular time, and the other mode is off-line detection, namely, after cloth production is finished, the cloth is additionally detected by using a cloth inspection machine, the two modes are time-consuming and labor-consuming, and in addition, the accuracy of human eyes and the instantaneity of the cloth inspection machine are insufficient, so that the problem of bad batch performance is often caused.

Therefore, the patent with the application publication number of CN214572888U discloses a cloth image real-time acquisition processing mechanism based on a circular knitting machine, wherein a camera and a light source are arranged on the inner side wall of a circular knitting platform, so that the real-time property of cloth detection is improved. However, when the camera detects, the cloth is wound on the cloth drum, most of the cloth in the image shot by the camera is in a curved surface state, the comparison of the real-time image and the template is not facilitated, the position of the camera is relatively fixed, flaws in a region far away from the camera such as flaws at the edge are difficult to detect, misjudgment is easy to occur, and therefore, the accuracy and the comprehensiveness of detection are required to be further improved.

In view of the above, the present inventors have made intensive studies to solve the above-mentioned drawbacks of the prior art.

Disclosure of Invention

The first purpose of this application provides a cloth detection device suitable for scutching cloth rolling machine, and this cloth detection device simple structure can accomplish the positive image detection of cloth when cloth is carried, has effectively improved the precision accuracy and the comprehensiveness that cloth detected.

The second object of the application is to provide another cloth detection device, which can finish the image detection of the front surface and the back surface of the cloth while conveying the cloth, and further improves the comprehensiveness of cloth detection.

The third object of the application is to provide a cloth detection method, by matching the detection method with a corresponding detection device, flaws on the front surface of the cloth can be effectively detected, and missed detection can not occur basically.

The fourth object of the present application is to provide a cloth detection method, by which flaws on the front surface and the back surface of a cloth can be effectively detected by matching with corresponding detection devices, and no omission occurs basically.

To achieve the first object of the present application, the present invention discloses a cloth inspection device suitable for a scutching cloth winding machine, which is rotatably operated in a circular knitting machine, comprising: the frame, the frame parallel interval is provided with first rubber roll group and second rubber roll group, one side of second rubber roll group is equipped with the batching roller, the discharge end of first rubber roll group corresponds the feed end of second rubber roll group, the discharge end of second rubber roll group corresponds the feed end of batching roller, be provided with image acquisition module between first rubber roll group and the second rubber roll group, image acquisition module includes guide, driving piece, camera module, and its driving piece and camera module outside electricity are connected with control system, the guide includes guide rail and slider, the length direction of guide rail is basically on a parallel with first rubber roll group axial, the driving piece drives the slider and positively or backward slides along the length direction of guide rail and move, the camera module sets up in the slider, and its camera module's camera lens carries out image acquisition towards cloth, control system is used for receiving the real-time image information that the camera module gathered at least to compare the analysis with its preset qualified template, once analysis result is unqualified, outwards sends the feedback instruction.

Further, the distance between the discharge end of the first rubber roller group and the feeding end of the second rubber roller group is a transmission distance, and the lens of the camera shooting module is arranged above the direction vertical 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, a light guide cover is additionally arranged at the outer periphery of the first light sources, and the side wall of the light guide cover is used for projecting light paths of the plurality of first light sources to the front of the lens of the camera module.

By adopting the structure, the camera module slides on the guide rail, so that the range shot by the camera module can be accurately covered on two edges in the width direction of cloth on one hand, the detection is more comprehensive, and the local details of the cloth can be more highlighted on the image shot by the camera module on the other hand, namely, the detection precision is higher.

In order to achieve the second object of the present application, the present invention discloses a cloth inspection device suitable for an open width fabric winding machine, where the cloth inspection device is based on the first object cloth inspection device, and the image acquisition module further includes a light shielding member, which is disposed on the frame and is opposite to the lens of the image capturing module, where the light shielding member has a light shielding body matched with the width of the cloth, and the light shielding body is disposed parallel to the guide rail, and at least the lens of the image capturing module has a light shielding body in a corresponding position in a corresponding effective view-finding area; the shading main body is provided with a groove, at least a plurality of second light sources are arranged in the groove, and the second light sources are electrically connected with the control system and are configured to assist the camera module in collecting the back side images of the cloth.

By adopting the structure, the shading piece effectively reduces background noise on the front face of the cloth collected by the camera module, improves image contrast, and can enable the camera module on the front face of the cloth to collect images on the back face of the cloth by setting the second light source and turning on the second light source under the state that the first light source is turned off.

In order to achieve the third object of the present invention, the present invention discloses a cloth detecting method suitable for an open-width cloth rewinder, which is applied to a first object cloth detecting device, comprising the steps of:

s1: in a preset running time T1, based on a preset cloth roller running speed V1, conveying the cloth from the first rubber roller group to the second rubber roller group for L1 length, controlling the sliding cycle time T2 of the camera module through a control system, wherein the sliding cycle time T2 is defined as the accumulated travel time of the camera module through forward sliding travel and reverse sliding travel from one end of a guide rail to the other end, when the camera module is provided with a first light source, the first light source at least ensures that the first light source keeps normally bright when a lens is in a working state, when the camera module is in the forward sliding travel, all effective view areas of the forward sliding travel collected by the camera module are mutually overlapped to form a first forward collecting image area, when the camera module is in the reverse sliding travel, all the effective view areas of the reverse sliding travel collected by the camera module are mutually overlapped to form a first reverse collecting image area, and the mutually overlapped part of the first forward collecting image area and the first reverse collecting image area is at least ensured that the first overlapping area can basically cover the area of the length of the cloth downwards sliding along the L1;

S2: transmitting the real-time cloth image acquired by the camera module to a control system;

s3: based on a qualified template and a threshold value which are preset in a control system, analyzing and comparing the template with the real-time cloth image, calculating the similarity between the real-time cloth image and the qualified template, and comparing the similarity with the threshold value;

if the similarity is greater than the threshold value, the real-time cloth image analysis result is qualified, and the cloth rolling machine continuously operates;

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

By adopting the method, in the preset running time T1, the first overlapping area collected by the camera module can cover the area of the length L1 of cloth conveying, the front detection of the cloth can be automatically and comprehensively completed, and when the detection is unqualified, the cloth winding machine can automatically alarm, so that the labor intensity of workers is effectively reduced, and the quality of products is ensured.

In order to achieve the fourth object of the present invention, the present invention discloses a cloth detecting method suitable for an open-width cloth rewinder, which is applied to a second object cloth detecting device, comprising the steps of:

s1: in a preset running time T1, based on a preset cloth rolling roller running speed V1, cloth is conveyed from a first rubber roller group to a second rubber roller group for L1 length, a control system is used for controlling the sliding cycle time T2 of a camera module, the sliding cycle time T2 is defined as the accumulated travel time of the camera module through the forward sliding travel and the reverse sliding travel from one end of a guide rail to the other end, when the camera module is in the forward sliding travel and is provided with a first light source, the first light source is turned on, the second light source is turned off, and all the effective view finding areas of the forward sliding travel collected by the camera module are mutually overlapped to form a second forward collecting image area, when the camera module is in the reverse sliding travel, the first light source of the camera module is turned off, the second light source of a shading main body is turned on, all the effective view finding areas of the reverse sliding travel collected by the camera module are mutually overlapped to form a second reverse collecting image area, and the mutually overlapped part of the second forward collecting image area and the second reverse collecting image area is at least ensured to be capable of fully covering the length L1 of cloth;

By adopting the method, the second overlapping area collected by the camera module can cover the area with the length of L1 for conveying the cloth, the detection of the front surface and the back surface of the cloth can be automatically and comprehensively completed, and when the detection is unqualified, the cloth winding machine can automatically alarm, so that the labor intensity of workers is effectively reduced, and the quality of products is ensured.

Drawings

The detailed description given as a non-limiting example better explains what the present application includes and can be implemented, and furthermore, the description makes reference to the accompanying drawings, in which:

fig. 1 is a schematic perspective view of a cloth detecting device according to an embodiment of the present invention;

fig. 2 is a schematic side view of a cloth inspection device according to an embodiment of the present invention, in which a side plate of a frame is omitted and a light shielding member is located at a first position;

FIG. 3 is a schematic side view of the image capturing module shown in FIG. 2;

fig. 4 is a schematic view of a partial perspective structure of an image acquisition module according to an embodiment of the present invention;

fig. 5 is a schematic perspective view of a light shielding member according to an embodiment of the present invention;

FIG. 6 is a detail view of a side plate portion of the shade of FIG. 5;

fig. 7 is a schematic side view of a cloth inspection device according to an embodiment of the present invention, in which a side plate of a frame is omitted and a light shielding member is located at a second position;

FIG. 8 is a schematic diagram illustrating a first position and a second position of a light shielding member according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a three-dimensional structure of an image detection module according to an embodiment of the present invention;

FIG. 10 is a second schematic diagram of a three-dimensional structure of an image detection module according to an embodiment of the present invention, wherein cloth is omitted in the diagram;

FIG. 11a is a schematic view of a first forward aggregate image area according to an embodiment of the present invention;

FIG. 11b is a schematic view of a first overlapping region according to the embodiment of the present invention;

fig. 11c is a coverage comparison chart of a first overlapping area and a cloth conveying width L2 area provided in an embodiment of the present invention;

FIG. 12 is an enlarged schematic view of area A of FIG. 11 a;

Fig. 13 is a schematic diagram of an acquisition principle of a camera module according to an embodiment of the present invention;

FIGS. 14 a-14 c illustrate three states of overlapping regions provided by embodiments of the present invention;

FIG. 15a is a schematic view illustrating the intersection of a second reverse aggregate image region in a first cycle of travel and a second forward aggregate image region in a second cycle of travel provided by the present invention;

FIG. 15b is a schematic view showing the intersection of the aggregate image area in the first cycle pass and the aggregate image area in the second cycle pass.

Description of the reference numerals:

1. a frame; 11. a rotating shaft; 12. a fastener; 13. a first limiting member; 14. a second limiting piece; 2. a first rubber roller group; 3. the second rubber roller group; 4. a cloth roller; 5. an image acquisition module; 51. a guide member; 511. a guide rail; 512. a slide block; 52. a driving member; 53. a camera module; 531. a lens; 532. a first light source; 533. a light guide cover; 54. a light shielding member; 541. a light shielding body; 542. a groove; 543. a second light source; 544. a side plate; 545. an open slot.

Detailed Description

The present application is described in detail below with reference to 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 may propose various structural manners and implementation manners that may be replaced with each other without changing the true spirit of the present application. Accordingly, the following detailed description and drawings are merely illustrative of the present application and are not intended to be exhaustive or to limit or restrict the application to the precise forms disclosed.

Terms of orientation such as up, down, left, right, front, rear, front, back, top, bottom, etc. mentioned or possible to be mentioned in the present specification are defined with respect to the configurations shown in the drawings, which are relative concepts, and thus may be changed according to different positions and different use states thereof. These and other directional terms should not be construed as limiting terms.

Example 1

Referring to fig. 1, a cloth detecting device for a cloth open-width winding machine according to the present embodiment will be described, where the winding machine is a winding device that rotates on a circular knitting machine, so that the cloth detecting device rotates synchronously with the winding machine and performs cloth detection.

Referring further to fig. 2 to 4, in this embodiment, the cloth detecting apparatus includes: the cloth rolling machine comprises a frame 1, wherein a first rubber roller set 2 and a second rubber roller set 3 are arranged on the frame 1 at intervals in parallel, the intervals in parallel refer to intervals of the first rubber roller set 2 and the second rubber roller set 3 which are basically parallel in the axial direction and are separated by a preset length along the preset direction, specifically, as shown in fig. 3, the intervals are respectively arranged on the basis that the first rubber roller set 2 and the second rubber roller set 3 are basically parallel in the axial direction, a cloth rolling roller 4 is arranged on one side of the second rubber roller set 3, the discharge end of the first rubber roller set 2 corresponds to the feed end of the second rubber roller set 3, the discharge end of the second rubber roller set 3 corresponds to the feed end of the cloth rolling roller set 4, namely, a cloth rolling path of cloth is firstly pulled through the first rubber roller set 2 and then pulled through the second rubber roller set 3, and finally the cloth rolling roller set 4 is wound on the power output end of a cloth rolling motor, and tensioning of the cloth is achieved through winding and pulling of the cloth rolling motor.

An image acquisition module 5 is arranged between the first rubber roller set 2 and the second rubber roller set 3, the image acquisition module 5 comprises a guide piece 51, a driving piece 52 and a camera module 53, the driving piece 52 and the camera module 53 are electrically connected with a control system, the guide piece 51 comprises a guide rail 511 and a sliding block 512, the length direction of the guide rail 511 is basically parallel to the axial direction of the first rubber roller set 2, the driving piece 52 drives the sliding block 512 to move forward or backward along the length direction of the guide rail 511, the driving piece 52 can be a combination of a motor and a chain or a combination of a motor and a screw rod, the sliding block 512 is arranged on the chain or the screw rod, and the motor is a motor with forward and backward rotation functions, such as a servo motor, a stepper motor and the like; in this embodiment, referring to fig. 10, taking the right end of the guide rail 511 as a starting point, the camera module 53 slides in a forward direction, that is, the camera module 53 slides from the right end of the guide rail 511 to the left end of the guide rail 511, and the camera module 53 slides from the left end of the guide rail 511 to the right end of the guide rail 511, it should be noted that the forward direction and the reverse direction are only used for distinguishing two travel sections of the camera module 53 sliding back and forth on the guide rail 511, and when the starting reference points are different, the forward direction and the reverse direction are also different, but not limited thereto; the camera module 53 is arranged on the slide block 512, the lens 531 of the camera module 53 performs image acquisition towards the cloth, and the camera module 53 moves along with the slide block 512, so that on one hand, the range shot by the camera module 53 can be precisely covered on two edges in the width direction of the cloth, so that detection is more comprehensive, on the other hand, the image shot by the camera module 53 can more prominently show local details of the cloth, namely, the detection precision is higher, and the control system is at least used for receiving real-time image information acquired by the camera module 53, comparing and analyzing the real-time image information with a preset qualified template thereof, and sending a feedback instruction outwards once the analysis result is unqualified. Wherein the failed cloth flaw form comprises: broken needles, oil yarns, greasy dirt, holes, crossbars and the like, particularly, the broken needles are shown to split along warp direction lines on a cloth cover, a hole is formed at the tail end in general, the greasy dirt is black oil points caused by pollution of the cloth cover by oil or air floating dust on a machine, the oil yarns are generated by oil agents or dirt carried by raw yarns, weft long strip-shaped defects are formed on the cloth cover, the broken holes are shown to be broken yarns on the cloth cover, holes exist, and the crossbars are shown to be abnormal continuous interlateral circulation in the tubular knitted fabric; the object of sending feedback instructions to the outside here is an electrical device that needs to respond when a failure is detected, such as a driver 52, an alarm, a cloth winding motor, etc., the feedback instructions include, but are not limited to, start-stop signals for the electrical device, such as an alarm start signal, a coil motor stop signal.

It will be appreciated that the cloth is a material for making a garment, the garment has an outer surface and an inner surface in contact with a human body, the outer surface of the garment directly affects the look and feel of a viewer, so that the outer surface has a higher aesthetic requirement relative to the inner surface, i.e. the control of flaws is also more severe, and the front surfaces of the cloth mentioned in this embodiment all refer to the surfaces of the cloth used as the outer surfaces of the garment; further, the lens 531 of the camera module 53 is disposed above the front direction perpendicular to the cloth, and the lens 531 is disposed perpendicular to the cloth, which has the advantage that the image of the cloth does not enter the lens 531 and is inclined at an angle, and the image shot by the camera module 53 can restore the actual image, which is beneficial to finding the flaw point on the cloth.

In this embodiment, as shown in fig. 3, the distance between the discharge end of the first rubber roll set 2 and the feed end of the second rubber roll set 3 is the transmission distance, in the prior art, based on the above two rubber roll sets, only the traction and guiding functions are performed, so that the transmission distance between the discharge end of the first rubber roll set 2 and the feed end of the second rubber roll set 3 is generally relatively short, in this case, due to the addition of the image acquisition module 5, it is required to ensure that a long enough time is required when the cloth is transmitted from the discharge end of the first rubber roll set 2 to the feed end of the second rubber roll set 3 at a certain speed, and in this long enough time, when the camera module 53 slides along the length direction of the guide rail 511, an image of the cloth in a flat state can be captured, and meanwhile, because the image acquisition module 5 also occupies a certain space, the transmission distance between the discharge end of the first rubber roll set 2 and the feed end of the second rubber roll set 3 is required to be properly enlarged, so that an operator can wind the cloth from the first rubber roll set 2 to the second rubber roll set 3.

Compared with the prior art, the cloth detection device provided by the embodiment sets up the transmission interval of cloth and the camera module 53 of sliding view finding through the first rubber roller group 2 and the second rubber roller group 3, so that the continuous smooth cloth cover image can be shot by the camera module 53 in the process of reciprocating sliding while the cloth is continuously conveyed, and the two edges in the width direction of the cloth can be accurately covered for detecting the cloth defects.

Referring to fig. 2-3 again, a transmission section is constructed by connecting a section between a section of the discharge end of the first rubber roll set 2 and a section of the feed end of the second rubber roll set 3, and the image acquisition module 5 is located between the transmission section and the cloth roller 4, and it should be noted that the front surface of the cloth conveyed by the existing open width cloth rolling machine faces the direction of the cloth roller 4, so that the image acquisition module 5 is arranged on the inner side, and is also based on the consideration of front surface detection of the cloth. In addition, the interval between the feeding end of the first rubber roller group 2 and the axis of the cloth roller 4 in the X direction is smaller than the interval between the discharging end of the second rubber roller group 3 and the axis of the cloth roller 4 in the X direction, so that the front detection of the cloth is met, and meanwhile, the structure of the cloth detection device is more compact.

As shown in fig. 4, in this embodiment, the image capturing module 53 is disposed at an outer diameter end of the lens 531, a plurality of first light sources 532 may be symmetrically disposed around an axis of the lens 531, the number of the first light sources 532 may be at least three, for example, 10-24, and a light guide cover 533 is further disposed at an outer periphery of the first light sources 532, where the light guide cover 533 covers a front end of the lens 531 to avoid influence of stray light at other positions on the lens 531, and the light guide cover 533 further has a side wall, where the side wall is used to project light paths of the plurality of first light sources 532 directly in front of the lens 531 of the image capturing module 53, that is, the light paths of the first light sources 532 cover a path area between the lens 531 and a piece of cloth, so that a pure light path is added to the lens 531, so that the lens 531 can obtain a clearer piece of cloth image.

The present embodiment also provides a cloth detection method suitable for a scutching cloth winding machine, which is applied to the cloth detection device, and the method is suitable for the image acquisition of the front surface of the cloth by the camera module 53 in the sliding process, and at least ensures that the camera module 53 basically does not cause missing detection of the cloth in the conveying process, and specifically comprises the following steps:

S1: during a preset running time T1, based on a preset running speed V1 of the cloth winding roller 4, the cloth is conveyed from the first rubber roller set 2 to the second rubber roller set 3 for L1 length, the sliding cycle time T2 of the image pickup module 53 is controlled by the control system, wherein the sliding cycle time T2 is defined as the time of accumulating the forward sliding travel and the backward sliding travel of the image pickup module 53 from one end of the guide rail 511 to the other end, namely the image pickup module 53 takes one end of the guide rail 511 as a starting point, the sliding cycle time T2 is passed, the total sliding travel is the accumulation of the forward sliding travel and the backward sliding travel, the image pickup module 53 returns to the starting point, the first light source 532 at least ensures that the lens 531 keeps always bright when the lens 531 is in an operating state when the image pickup module 53 is in the forward sliding travel, the effective framing areas of the forward sliding strokes acquired by the image capturing module 53 are mutually overlapped to form a first forward collection image area, when the image capturing module 53 is in the backward sliding stroke, the effective framing areas of the backward sliding strokes acquired by the image capturing module 53 are mutually overlapped to form a first backward collection image area, wherein the first forward collection image area and the first backward collection image area acquire images of the front face of the cloth, the mutually overlapped parts of the first forward collection image area and the first backward collection image area are first overlapped areas, at least the first overlapped areas are ensured to be capable of basically fully covering the area of the cloth sliding downwards for L1 length, and in the embodiment, the basically fully covering means that the first overlapped areas cover the proportional interval of the area of the cloth sliding downwards for L1 length within the preset running time T1;

S2: transmitting the real-time cloth image acquired by the camera module 53 to a control system;

the camera module 53 and the control system can realize data transmission through a special data line, the control system can be an upper computer and is configured to process and display the acquisition result of the image, and when the image detection is unqualified, a feedback instruction is output to an external electric device, so that the cloth winding machine is stopped.

S3: based on a qualified template and a threshold value which are preset in a control system, wherein the qualified template refers to a normal produced flawless cloth image, the threshold value refers to the minimum similarity value of the image qualification, the minimum similarity value is analyzed and compared with a real-time cloth image, the similarity between the real-time cloth image and the qualified template is calculated, and the similarity is compared with the threshold value;

By adopting the method, in the preset running time T1, the first overlapping area collected by the camera module 53 can basically fully cover the area of the length L1 of cloth conveying, the front detection of the cloth can be automatically and comprehensively completed, and when the detection is unqualified, the cloth winding machine can automatically alarm, so that the labor intensity of workers is effectively reduced, and the quality of products is ensured.

The following mainly describes the step S1:

firstly, the analysis model is built, in an actual application scene, the pick-up module 53 slides horizontally along the guide rail 511, meanwhile, the cloth is conveyed downwards, and when the pick-up module 53 and the cloth are both in motion, the analysis is not easy. Thus, assuming that the cloth is stationary in the analytical model, it will be appreciated that the movement of the camera module 53 includes a horizontal slip while also moving in a direction opposite to the cloth transport direction, and that in general the slip rate of the camera module 53 is fixed.

Secondly, the working process and principle analysis of the method are that the visual field transverse detection distance W and the visual field longitudinal detection distance H of the visual field unit of the camera module 53 are preset, wherein the visual field transverse detection distance W is the actual transverse length of the detection area in the visual field of the lens 531, the visual field longitudinal detection distance H is the actual longitudinal length of the detection area in the visual field of the lens 531, and then the periodic travel WS is defined as the accumulation of the forward sliding travel and the backward sliding travel of the camera module 53 from one end to the other end of the guide rail 511 based on the periodic travel WS of the camera module 53, so long as the effective viewing areas of the camera module 53 at the two ends of the guide rail 511 only can cover the two edges in the width direction of cloth, the periodic travel WS is a floatable section, the travel value of the periodic travel WS in this embodiment is 2 times the cloth width WB value, please refer to fig. 10, the travel value of the camera module 53 is located at the rightmost end of the guide rail 511 is used as the starting point, and the camera module 53 slides from the rightmost end to the leftmost end of the guide rail 511 is used as the forward sliding, otherwise the backward sliding travel is performed. The effective view finding areas collected by the forward sliding of the image pickup module 53 are mutually overlapped to form an aggregate image area as a first forward aggregate image area, the effective view finding areas collected by the backward sliding of the image pickup module 53 are mutually overlapped to form an aggregate image area as a first backward aggregate image area, and the first forward aggregate image area and the first backward aggregate image area both collect images of the front face of the cloth; as shown in fig. 11a, the upper end and the lower end of fig. 11a are respectively a first rubber roll set 2 and a second rubber roll set 3, the cloth is located between the first rubber roll set 2 and the second rubber roll set 3, the solid line path frame in the middle of the cloth is a first forward set image area, as shown in fig. 11b, in one sliding cycle time T2, the solid line path frame in the middle of the cloth is a first forward set image area, the dotted line path frame is a first reverse set image area, the intersecting line area of the first forward set image area and the second reverse set image area is a first overlapping area, the conveying length of the cloth moving downwards at this time is L2, as shown in fig. 11c, the first overlapping area is cut out, so that the first overlapping area is compared with the area with the conveying length of the cloth moving downwards being L2, and as long as the first overlapping area covers the area with the conveying length of the cloth moving downwards being L2, no omission is caused. Of course, fig. 11c shows a first overlapping area, which is a special case of overlapping the first forward set image area and the first reverse set image area in the same slip period T2, to facilitate understanding. Similarly, at the predetermined running time T1, there are a plurality of slip cycle times T2, and the first overlap region can substantially cover the region of the transport length L1 where the cloth is shifted down.

It should be noted that, referring to fig. 11a and 12, fig. 12 shows an enlarged schematic view of the area a in fig. 11a, where the solid line path frame in fig. 11a is the first forward aggregate image area, two boxes respectively represent two adjacent effective view-finding areas in the sliding process, in order to facilitate understanding, adjacent edges of the two effective view-finding areas are overlapped, and the two effective view-finding areas are offset from each other by a slight distance in the cloth conveying direction, so that gaps exist between the lower and upper parts of the two effective view-finding areas and the solid line path frame, that is, two small triangular areas S are respectively present, the small triangular areas S are detected dead areas, and when the running speed V1 of the cloth winding roller 4 is slower, the sliding speed of the image-finding module 53 is slower, and when the frame rate FR of the image-finding module 53 is greater, the small triangular areas S are smaller. Overall, the small triangular area S has a small duty cycle; therefore, under the condition that the running speed V1 of the cloth rolling roller 4 and the sliding cycle time T2 are matched, the first overlapping area can basically fully cover the area of the cloth sliding downwards by the length L1, and no detection omission occurs basically. According to the running speed V1 of the cloth roller 4, the sliding cycle time T2, and the analysis model, three superposition results of the first forward image region and the reverse image region of the image capturing module 53 in one cycle travel can be obtained:

Referring to fig. 3 and fig. 14 a-14 c, fig. 14 a-14 c show three states of an overlapping area, in an embodiment, that is, in one cycle of travel, three states of a first overlapping area where a first forward-direction aggregate image area of the image capturing module 53 intersects with a first reverse-direction aggregate image area, specifically, a first forward-direction aggregate image area obtained by a forward sliding travel of the image capturing module 53 is shown as a solid line path box in the middle of a piece of cloth, a first reverse-direction aggregate image area obtained by a reverse sliding travel of the image capturing module 53 is shown as a broken line path box in the middle of the piece of cloth, a portion where the two overlapping areas are shown as a cross-sectional area in the middle of the piece of cloth, and a length L3 of the first overlapping area is defined as a length of a rightmost end point and a leftmost line segment perpendicular line of the first overlapping area; in a slip cycle time T2, in fig. 14a, the conveying length L2 of the cloth is greater than the visual field longitudinal detection distance H, the length L3 of the first overlapping area is smaller than the width WB of the cloth, and at this time, a gap area exists between the first reverse collection image area at the upper part of the rightmost end and the first forward collection image area at the lower part of the rightmost end, namely, a missing detection area exists; in fig. 14b, the conveying length L2 of the cloth is equal to the visual field longitudinal detection distance H, the length L3 of the first overlapping area is equal to the width WB of the cloth, but the rightmost end of the first overlapping area has only one endpoint, and at this time, a gap area does not exist in the first reverse aggregate image area at the upper part of the rightmost end and the first forward aggregate image area at the lower part of the rightmost end; in fig. 14c, the conveying length L2 of the cloth is smaller than the visual field longitudinal detection distance H, the length L3 of the first overlapping area is equal to the width WB of the cloth, two endpoints exist at the rightmost end of the first overlapping area, at this time, a first reverse aggregate image area at the upper part of the rightmost end and a first forward aggregate image area at the lower part of the rightmost end do not have a gap area, and the area of the first overlapping area is larger than that of the first overlapping area in fig. 14 b; that is, at least the first overlapping area length L3 is ensured to cover the width WB of the cloth, so that no omission occurs.

Further, controlling the slip cycle time T2 of the image pickup module 53 by the control system includes: referring to fig. 11 a-11 c, fig. 13, fig. 14 a-14 c, fig. 13 illustrates the collection principle of the camera module 53, based on the width WB of the cloth, the camera module 53 is preset to slide on a periodic travel WS of the guide rail 511, where the periodic travel is defined as accumulation of forward and reverse sliding travel of the camera module 53 from one end of the guide rail 511 to the other end, where when the camera module 53 is located at two travel ends of the periodic travel WS, the aggregate image area constructed by the camera module 53 at least includes two edges of the cloth in the width direction; based on the working distance WD between the preset lens 531 and the cloth, the focal length f of the camera module 53, and the side length H of the chip target surface of the camera module 53 parallel to the cloth conveying direction, the vertical detection distance h=h of the field of view of the camera module 53 along the cloth conveying direction is obtained, and meanwhile, the horizontal detection distance w=w of the field of view of the camera module 53 along the cloth width direction is obtained according to the side length W of the chip target surface of the camera module 53 parallel to the cloth width direction, and then the horizontal detection distance W of the field of view of the view unit in the effective view-finding area of the camera module 53 and the vertical detection distance H of the field of view are determined, and of course, the resolution of the camera module 53 should meet the shooting requirement and are not repeated here;

According to the above three results, if no omission occurs, the conveying length L2 of the cloth should be equal to or smaller than the visual field longitudinal detection distance H at the slip cycle time T2 of the image pickup module 53. Similarly, when the cloth conveying length value is H, the camera module 53 should complete at least one sliding cycle time T2; that is, based on the preset running speed V1 of the cloth-rolling drum 4, since the running speed V1 of the cloth-rolling drum 4 is to be adapted to the weaving speed of the circular knitting machine, the running speed V1 of the cloth-rolling drum 4 is preset, the visual field longitudinal detection distance H of the image pickup module 53 is preset, the time t3=h/V1 of the cloth passing the visual field longitudinal detection distance H is obtained, the time T3 of the cloth passing the visual field longitudinal detection distance H refers to the time taken for the cloth to move down by the conveying length value H, the slip cycle time T2 is less than or equal to T3, and the average slip speed v2=ws/T2 of the image pickup module 53.

Further, setting the frame rate FR of the image capturing module 53, where the frame rate FR of the image capturing module 53 refers to the number of times of capturing each second of the image capturing module 53, so FR is an integer value, and in 1/2 of the sliding cycle time T2 of the image capturing module 53, that is, the image capturing module 53 may complete sliding between the rightmost end and the leftmost end of the guide rail 511, and make the first forward image collecting region of the image capturing module 53 cover the width of cloth, when adjacent pictures in the first forward image collecting region are seamlessly connected with each other, the sum of the field transverse detection distances W of each picture in the first forward image collecting region should be greater than or equal to the width of cloth, that is, fr×t2/2*W is greater than or equal to WB, and FR is greater than or equal to 2 WB/(w×t2). In the ideal case, that is, the running speed V1 and the slip period time T2 of the cloth rolling drum 4 are adapted, and the frame rate is high enough, the first overlapping area can be ensured to completely cover the area of the length L1 of the downward slip of the cloth, but in this way, the overlapping area ratio between adjacent pictures is high, although the omission is not caused, the image capturing module 53 generates a large amount of pictures in the process of collecting the slip period time T2, the large amount of pictures means that a large amount of data is generated, on one hand, delay and stop are caused to data transmission, on the other hand, the control system needs to continuously calculate and process the comparison output result in the slip period time T2, if the program calculation force is insufficient, that is, the control system is insufficient to digest the pictures generated by the image capturing module 53 in the slip period time T2, the program is easy to halt, and furthermore, the control system stores the pictures in a large amount of running memory of the control system is occupied by the frequent storage of the pictures, and the program running is blocked. Therefore, on the basis of ensuring the basic full coverage, the frame rate FR is reasonably set, and the edges of adjacent pictures in the image collecting region are mutually overlapped by sacrificing a small part of region, at this time, as shown in fig. 12, the area of the small triangle region S is larger, but the resource optimization such as data transmission, program calculation power, memory occupation and the like is replaced, so that the image collecting and detecting process is smoother.

Taking the actual production parameters of a 96-path circular knitting machine as an example for formula explanation, the width of cloth produced is 1800mm, the cycle travel WS of a preset camera module 53 is 2 times of the width, namely 3600mm, the existing circular knitting machine can rotate 13 circles in one minute, the length of cloth woven by the circular knitting machine in one circle is 15mm, meanwhile, the conveying length of the cloth in one circle of the circular knitting machine is 15mm, in one minute, the conveying length L1=15×13=195 mm of the cloth of the circular knitting machine, the running speed V1=L1/T1=195/60=3.25 mm of a cloth rolling roller 4 can be known, based on the preset camera module 53, the target surface length of a chip is 4mm, the width is 2mm, the focal length is 8mm, the working distance between a lens 531 and the cloth is 160mm, the visual field transverse detection distance W=2×160/8=40 mm, the longitudinal detection distance H=4×160/8=80 mm, and further the visual field transverse detection distance H=3/3.25 mm of the cloth can be further detected in the three-dimensional time period of the circular knitting machine, namely, the three-dimensional sliding movement can be completed in the three-dimensional time of the three-dimensional sliding camera module 53, namely, the three-dimensional sliding time is less than or equal to 3.25 mm. Further, v2=ws/t2=3600/20=180 mm/s, FR is equal to or greater than 3600/(40×20) =4.5, and the rounding yields an FR frame rate of at least 5FPS.

Example two

The cloth detecting device provided in this embodiment is a further improvement on the cloth detecting device in the first embodiment, and is characterized in that the image collecting module 5 further includes a light shielding member 54, and a second light source 543 configured to assist the image capturing module 53 in collecting the back image of the cloth is disposed on the light shielding member 54. It should be noted that, the cloth is formed by mutually intersecting fabrics, and many tiny pores are formed between the fabrics, which do not completely seal the light-tight, so that the real background on the back of the cloth may interfere with the front image of the cloth acquired by the camera module 53. In order to eliminate interference, the light shielding piece 54 is additionally arranged, and the light shielding piece 54 can be made of opaque materials such as a wood board and a metal board, or is provided with a light absorption coating such as a black coating, so that background noise can be effectively reduced by arranging the light shielding piece 54, image contrast is improved, and the image acquisition of the front face of the cloth is more accurate.

Referring to fig. 5-8, specifically, the light shielding member 54 is disposed on the frame 1 and opposite to the lens 531 of the image capturing module 53, that is, the lens 531 and the light shielding member 54 of the image capturing module 53 are respectively located on two sides of the front and the back of the cloth, the light shielding member 54 has a light shielding body 541 matched with the width of the cloth, and the light shielding body 541 is disposed parallel to the guide rail 511, at least the lens 531 of the image capturing module 53 has a light shielding body 541 corresponding to the effective viewing area. It is to be understood that, the image capturing module 53 is slid on the guide rail 511, and the view finding areas at the two end points of the guide rail 511 at least cover two edges in the width direction of the cloth, and there may be areas not belonging to the cloth, so that the effective view finding area refers to the view finding area of the corresponding cloth, and the light shielding main body 541 can play a role of enhancing the front detection of the cloth as long as it is disposed in the effective view finding area. Referring to fig. 5, 9 and 10, in this embodiment, the light shielding main body 541 further has a groove 542, a cross section of the groove 542 is U-shaped, at least a plurality of second light sources 543 are disposed in the groove 542, the plurality of second light sources 543 may be arranged along a length direction of the groove 542, and the plurality of second light sources 543 may also be arranged along a width of the groove 542, and the second light sources 543 are electrically connected to the control system and configured to assist the image capturing module 53 to capture a reverse side image of the cloth. Specifically, when the image capturing module 53 is in a forward sliding stroke and the image capturing module 53 is provided with the first light source 532, the first light source 532 of the image capturing module 53 is turned on, the second light source 543 of the light shielding main body 541 is turned off, and the effective view finding areas of the forward sliding stroke collected by the image capturing module 53 are overlapped to form a forward aggregate image area, that is, the image capturing module 53 collects images of the front surface of the cloth; when the image capturing module 53 is in the reverse sliding stroke, the first light source 532 of the image capturing module 53 is turned off, the second light source 543 of the light shielding main body 541 is turned on, and the effective view-finding areas of the reverse sliding stroke collected by the image capturing module 53 are overlapped to form a reverse aggregate image area, that is, the image capturing module 53 collects the image of the back surface of the cloth. In summary, through setting up the second light source 543 on shade 54, on the basis function of the positive image of cloth of camera module 53 collection for camera module 53 can also possess cloth reverse side image acquisition's function through the cooperation with first light source 532, second light source 543, has improved the comprehensive degree that the cloth detected greatly, has effectively reduced the probability of missing to examine.

When the cloth is detected poorly, the cloth needs to be processed manually, and in order to facilitate the operation of the staff, the light shielding member 54 is further arranged to be movably connected with the frame 1 in a position adjustment manner, and at least when the light shielding member 54 is at the first position, the light shielding member is located in the effective scenery taking area corresponding to the lens 531 of the camera module 53; when the light shielding member 54 is at the second position, it is moved away from the effective view area corresponding to the lens 531 of the image capturing module 53, so that the worker can conveniently perform the cloth feeding operation from the first rubber roller set 2 to the second rubber roller set 3. The first position refers to the working position of the light shielding member 54 when the image capturing module 5 is operating normally, at this time, the light shielding main body 541 is located in the effective view-taking area corresponding to the lens 531 of the image capturing module 53 and is substantially parallel to the guide rail 511, and the second position refers to the placement position of the light shielding member 54 when the image capturing module 5 is not operating, during the manual feeding process, at least to ensure that the light shielding member 54 is not located in the effective view-taking area corresponding to the lens 531 of the image capturing module 53, so as to facilitate operation.

Specifically, the light shielding member 54 further includes two side plates 544, the light shielding main body 541 is disposed between the two side plates 544, one end of the side plate 544 is rotatably pivoted to the frame 1 by the rotating shaft 11 disposed on the frame 1, in this embodiment, the end of the side plate 544 pivoted to the frame 1 is specifically a lower end of the side plate 544, a communicating opening slot 545 is further formed at a position where the light shielding main body 541 abuts against the side plate 544, an opening portion on the light shielding main body 541 is larger than an opening portion on the side plate 544, a fastener 12 is disposed on the frame 1, the fastener 12 penetrates through the opening slot 545, and the side plate 544 is pressed against the frame 1 so as to fix the light shielding member 54 at the first position. The fastening member 12 may be a locking screw screwed to the frame 1, the opening slot 545 is used for letting out the fastening member 12 when the light shielding member 54 rotates around the rotation axis 11, the opening portion on the light shielding main body 541 is used for letting out the head of the locking screw, and the opening portion on the side plate 544 is used for letting out the stem of the locking screw, so that the opening portion on the light shielding main body 541 is larger than the opening portion on the side plate 544, and in addition, by the arrangement of the opening slot 545, the fastening member 12 does not need to be detached when the light shielding member 54 rotates, and only the fastening member 12 needs to be unscrewed, so that the operation is simple and convenient. Referring to fig. 8, the frame 1 is further provided with a first limiting member 13 and a second limiting member 14, and the first limiting member 13 and the second limiting member 14 respectively abut against and limit two side edges of the side plate 544, so that the light shielding member 54 switches between a first position and a second position with the rotation shaft 11 as a rotation axis. The first limiting piece 13 and the second limiting piece 14 are first limiting screws and second limiting screws fixedly connected to the frame 1, the rod parts of the limiting screws are in threaded connection with the frame 1, and the head parts of the limiting screws are configured to be abutted against the side plates 544. When the light shielding piece 54 is to be rotated from the first position to the second position, the fastener 12 is only required to be unscrewed, the light shielding piece 54 is rotated to enable the light shielding piece 54 to rotate around the rotating shaft 11, and the locking screw is simultaneously rotated out of the opening groove 545 until the side edge of the light shielding piece abuts against the head of the second limiting screw, so that the limiting of the light shielding piece 54 at the second position can be completed without other additional operations; when the light shielding member 54 is to be rotated from the second position to the first position, the light shielding member 54 is rotated around the rotation shaft 11 until the light shielding side edge abuts against the head of the first limiting screw to complete the preliminary limiting, and meanwhile, the locking screw is turned into the opening slot 545, and then the locking screw is tightened to fasten the light shielding member 54.

The embodiment also provides a cloth detection method suitable for a scutching cloth rolling machine, the method is suitable for the image acquisition of the front and the back of the cloth by the camera module 53 in the sliding process, at least ensures that the camera module 53 basically does not cause missed detection of the front and the back of the cloth in the conveying process, and specifically comprises the following steps:

s1: in a preset running time T1, based on a preset running speed V1 of the cloth winding roller 4, conveying the cloth from the first rubber roller group 2 to the second rubber roller group 3 for L1 length, controlling a sliding cycle time T2 of the image capturing module 53 through a control system, wherein the sliding cycle time T2 is defined as the time of accumulating the forward sliding travel and the backward sliding travel of the image capturing module 53 from one end of the guide rail 511 to the other end, when the image capturing module 53 is in the forward sliding travel and the image capturing module 53 is provided with a first light source 532, the first light source 532 is turned on, meanwhile, the second light source 543 is turned off, and all effective view finding areas of the forward sliding travel acquired through the image capturing module 53 are mutually overlapped to form a second forward collecting image area, when the image capturing module 53 is in the backward sliding travel, the first light source 532 of the image capturing module 53 is turned off, the second light source of the light shielding main body 541 is turned on, and the second forward collecting image area and the second reverse collecting image area are mutually overlapped to form a second overlapping area, so that the full overlapping length L1 can be at least basically overlapped; in this embodiment, substantially full coverage means that the second overlapping area covers a proportion of the length area of the cloth slipping down L1 by 90% -100% within the predetermined running time T1;

By adopting the method, the collection image area collected by the camera module 53 can cover the area with the length of L1 for conveying cloth, the detection of the front surface and the back surface of the cloth can be automatically and comprehensively completed, and when the detection is unqualified, the cloth winding machine can automatically alarm, thereby effectively reducing the labor intensity of workers and ensuring the quality of products.

The cloth detection method of the present embodiment differs from the cloth detection method of the first embodiment in that: the image capturing module 53 captures front and back images of the cloth, and when the image capturing module 53 captures back images of the cloth, the lighting strategy of the first light source 532 and the second light source 543 is different from that of the image capturing module 53.

In the description of the cloth detection method in the first embodiment, a first forward set image area and a first reverse set image area are mentioned, and in the second embodiment, a second forward set image area and a second reverse set image area are provided; the first forward direction set image area and the second forward direction set image area are defined as set image areas collected by the camera module 53 in the forward direction sliding travel, and the first reverse direction set image area and the second reverse direction set image area are defined as set image areas collected by the camera module 53 in the reverse direction sliding travel; the difference is that the first forward-direction set image area and the first reverse-direction set image area are both used for collecting the image of the front surface of the cloth in the state that the first light source 532 is always on, the second forward-direction set image area of the second embodiment is used for collecting the image of the front surface of the cloth in the scene that the first light source 532 is always on while the second light source 543 is turned off, and the second reverse-direction set image area of the second embodiment is used for collecting the image of the back surface of the cloth in the scene that the first light source 532 is turned off while the second light source 543 is always on.

Step S1 is described below in conjunction with fig. 3, 10, 14 a=14 c, and 15 a-15 b:

the cycle travel WS is defined as the accumulation of the forward and reverse sliding travel of the camera module 53 from one end of the guide rail 511 to the other end, and the sliding cycle time T2 is the time taken for the camera module 53 to pass through the cycle travel, in the first cycle travel, when the camera module 53 is in the forward sliding travel and the camera module 53 has the first light source 532, the first light source 532 of the camera module 53 is turned on, the second light source 543 is turned off, and the effective view-finding areas of the forward sliding travel collected by the camera module 53 are overlapped with each other to form a second forward aggregate image area, and when the camera module 53 is in the reverse sliding travel, the first light source 532 of the camera module 53 is turned off, the second light source 543 of the light-shielding main body 541 is turned on, and the respective effective viewfinder areas of the reverse sliding strokes acquired by the image capturing module 53 are superimposed on each other to form a second reverse aggregate image area, fig. 14a to 14c show three states of the superimposed areas, in this embodiment, three states of the second superimposed areas where the second forward aggregate image area of the image capturing module 53 intersects with the second reverse aggregate image area during one cycle stroke, specifically, as shown in fig. 14a, the second forward-direction aggregate image area is shown in a solid line path box in the middle of the cloth in fig. 14a, the second reverse-direction aggregate image area is shown in a broken line path box in the middle of the cloth, and the overlapping part of the second forward-direction aggregate image area and the second reverse-direction aggregate image area is shown in a second overlapping area which is shown in a section area in the middle of the cloth; the second forward direction collection image area of the first cycle travel only collects the front side image of the cloth, and the second reverse direction collection image area only collects the back side image of the cloth, so that the second overlapping area is used for collecting the front side image and the back side image of the cloth; as shown in fig. 15a, when the image capturing module 53 performs the second cycle travel, the second forward-direction set image area of the second cycle travel covers the second reverse-direction set image area where the first cycle travel is not overlapped, so as to implement the front-side image acquisition of the cloth in the area. The front and back images of adjacent periodic strokes of the camera module 53 are acquired and complemented, and the front and back images of the cloth can be acquired only by basically fully covering the area with the length L1 by downwards sliding the cloth in the second overlapping area, and the detection omission is avoided.

Although the second embodiment has additional reverse side detection on the cloth, the principle of achieving at least substantially no missing detection in the second embodiment is the same as that in the first embodiment, so that the image capturing module 53 has three overlapping results in the second forward direction collection image area and the reverse direction collection area in one cycle travel based on the difference of the running speed V1 and the sliding cycle time T2 of the cloth winding roller 4: in fig. 14a, the conveying length L3 of the cloth is greater than the vertical detection distance H of the field of view, the length L3 of the second overlapping area is smaller than the width WB of the cloth, and a gap area exists between the second reverse image collecting area at the upper part of the rightmost end and the second forward image collecting area at the lower part of the rightmost end, namely, a missed detection area exists; in fig. 14b, the conveying length L3 of the cloth is equal to the visual field longitudinal detection distance H, the length L3 of the second overlapping area is equal to the width WB of the cloth, but the rightmost end of the second overlapping area has only one endpoint, and at this time, the second reverse aggregate image area at the upper part of the rightmost end and the second forward aggregate image area at the lower part of the rightmost end have no void area; however, as there is detection of the reverse side of the piece goods, as shown in fig. 15a, fig. 15a is a schematic diagram illustrating the intersection of the second reverse-set image area in the first cycle and the second forward-set image area in the second cycle, in the first cycle, the upper boundary of the second reverse-set image area that does not overlap is the upper boundary line of the second reverse-set image area in the cycle, and the lower boundary thereof is the upper boundary line of the second forward-set image area in the cycle, because the view of the camera module 53 is in the form of a block diagram, the lower boundary line of the second forward-set image area in the second cycle is lower than the upper boundary line of the second forward-set image area in the first cycle, and correspondingly, as shown in fig. 15b, fig. 15b is the intersection of the first reverse-set image area and the second reverse-set image area in the cycle, in which the second forward-set image area does not overlap is accumulated, and the lower boundary line of the second forward-set image area in the cycle is lower than the upper boundary line of the second forward-set image area in the cycle, i.e. the second reverse-set image area that does not overlap occurs in the cycle; in fig. 14c, the conveying length L3 of the cloth is smaller than the visual field longitudinal detection distance H, the length L3 of the second overlapping area is equal to the width WB of the cloth, two endpoints exist at the rightmost end of the second overlapping area, at this time, a gap area does not exist in the second reverse collecting image area at the upper part of the rightmost end and the second forward collecting image area at the lower part of the rightmost end, the area of the second overlapping area is larger than that of the second overlapping area in fig. 14b, and the second forward collecting image area of the second cycle travel can cover the second reverse collecting image area where the first cycle travel is not overlapped; that is, at least the second overlapping area length L3 is ensured to cover the width WB of the cloth, so that no omission occurs substantially, and the same applies to the present embodiment.

As for the matching of various parameters such as the running speed V1 of the cloth roller 4 and the sliding cycle time T2, please refer to the corresponding part of the first embodiment, the sliding cycle time T2 of the camera module 53 is controlled by the control system, which further includes: based on a preset running speed V1 of the cloth-rolling roller 4, the visual field longitudinal detection distance H of the camera module 53 obtains time t3=h/V1 when the cloth passes through the visual field longitudinal detection distance H, and the slip cycle time T2 is less than or equal to T3. In addition, for determining the frame rate FR of the image capturing module 53, please refer to the corresponding parts in the cloth detection method of the first embodiment, which will not be described herein.

It should be understood that all of the above preferred embodiments are exemplary and not limiting, and that various modifications or variations to the specific embodiments described above, which are within the spirit of the present application, would be within the scope of legal protection given to this application by those skilled in the art.

Claims

1. Cloth detection device suitable for open width cloth rewinder, rotatory operation in knitting circular knitting machine, its characterized in that includes: the frame (1), the parallel interval of frame (1) is provided with first rubber roll group (2) and second rubber roll group (3), one side of second rubber roll group (3) is equipped with batching roller (4), the feed end of second rubber roll group (3) is corresponding to the discharge end of first rubber roll group (2), the feed end of batching roller (4) is corresponding to the discharge end of second rubber roll group (3), be provided with image acquisition module (5) between first rubber roll group (2) and second rubber roll group (3), image acquisition module (5) are including guide (51), driving piece (52), camera module (53), its driving piece (52) and camera module (53) outside electricity are connected with control system, guide (51) are including guide rail (511) and slider (512), the length direction of guide rail (511) is basically parallel to first rubber roll group (2) axial, driving piece (52) drive slider (512) is along the length direction of guide rail (511) forward or upwards to the feed end of batching roller (4), image acquisition module (53) is compared with image acquisition module (53) and is carried out in advance and is carried out image acquisition module (53) and is compared with image acquisition module (53) that image acquisition module (53) is qualified in real-time image acquisition system, and sending a feedback instruction outwards once the analysis result is unqualified.

2. A cloth inspection device suitable for a scutching cloth winding machine according to claim 1, characterized in that the distance between the discharge end of the first rubber roller set (2) and the feed end of the second rubber roller set (3) is a transmission distance, and the lens (531) of the camera module (53) is arranged above the direction vertical to the front of the cloth.

3. Cloth inspection device according to claim 2, characterized in that the connection between the cut surfaces of the feeding end of the second rubber roll set (3) and the cut surfaces of the discharge end of the first rubber roll set (2) constitutes a transmission cut surface, and the image acquisition module (5) is located between the transmission cut surface and the cloth rolling drum (4).

4. A cloth inspection device suitable for a scutcher according to claim 1, characterized in that the camera module (53) is provided with a plurality of first light sources (532) at the outer diameter end of the lens (531), and a light guide cover (533) is additionally arranged at the outer periphery of the first light sources (532), and the side wall of the light guide cover (533) is used for projecting the light paths of the plurality of first light sources (532) to the position right in front of the lens (531) of the camera module (53).

5. Cloth inspection device suitable for open-width cloth rewinder according to any of claims 1-4, characterized in that the image acquisition module (5) further comprises a shading member (54) arranged on the frame (1) and arranged opposite to the lens (531) of the camera module (53), the shading member (54) has a shading body (541) matching the cloth width, and the shading body (541) is arranged parallel to the guide rail (511), at least the lens (531) of the camera module (53) has a shading body (541) in a corresponding position in the effective viewing area.

6. A cloth inspection device suitable for a scutcher as claimed in claim 5, characterized in that the shading body (541) has a groove (542), and at least a plurality of second light sources (543) are disposed in the groove (542), and the second light sources (543) are electrically connected to the control system and configured to assist the camera module (53) in capturing images of the back surface of the cloth.

7. A cloth inspection device suitable for a scutcher according to claim 5 or 6, characterized in that the shutter (54) is arranged to be movable in a position-adjustable connection with the frame (1), at least when the shutter (54) is in the first position, it is in the effective view area corresponding to the lens (531) of the camera module (53); when the shading piece (54) is positioned at the second position, the shading piece is moved away from the effective scenic spot corresponding to the lens (531) of the camera module (53), so that a worker can conveniently perform cloth feeding operation from the first rubber roller set (2) to the second rubber roller set (3).

8. A cloth inspecting apparatus for an open-width fabric winding machine according to claim 7, wherein the light shielding member (54) further comprises two side plates (544), the light shielding body (541) is disposed between the two side plates (544), one end of the side plate (544) is rotatably pivoted with the frame (1) by a rotating shaft (11) disposed on the frame (1), a communicating opening slot (545) is formed at a position where the light shielding body (541) abuts against the side plate (544), an opening portion of the light shielding body (541) is larger than an opening portion of the side plate (544), a fastener (12) is disposed on the frame (1), the opening slot (545) is penetrated by the fastener (12), and the side plate (544) is pressed against the frame (1) so as to fix the light shielding member (54) at the first position.

9. A cloth inspection device according to claim 8, characterized in that the frame (1) is further provided with a first limiting member (13) and a second limiting member (14), and the first limiting member (13) and the second limiting member (14) respectively abut against and limit two sides of the side plate (544), so that the light shielding member (54) uses the rotating shaft (11) as a rotating shaft center, and is switched between the first position and the second position.

10. A cloth inspection method suitable for an open width cloth rewinder, applied to the cloth inspection device of any one of claims 1-4, characterized by comprising the steps of:

s1: in a preset running time T1, based on a preset running speed V1 of a cloth winding roller (4), conveying the cloth from a first rubber roller set (2) to a second rubber roller set (3) for L1 length, controlling a sliding cycle time T2 of a camera module (53) through a control system, wherein the sliding cycle time T2 is defined as the time of accumulated strokes of the camera module (53) from one end of a guide rail (511) to the other end of the guide rail, when the camera module (53) is provided with a first light source (532), the first light source (532) is at least kept normally bright when a lens (531) is in an operating state, when the camera module (53) is in a forward sliding stroke, all effective view areas acquired through the camera module (53) are overlapped with each other to form a first forward aggregate image area, when the camera module (53) is in a reverse sliding stroke, all effective view areas acquired through the camera module (53) are overlapped with each other to form a first reverse aggregate image area, and at least one first forward aggregate image area and a first reverse aggregate image area overlap with each other to be at least one first overlap area, and the first aggregate area can be overlapped with each other to a first area and at least one full overlap length L can be ensured;

S2: transmitting the real-time cloth image acquired by the camera module (53) to a control system;

11. A cloth inspection method suitable for an open width cloth rewinder, applied to the cloth inspection device of any one of claims 6-9, characterized by comprising the steps of:

s1: in a preset running time T1, based on a preset running speed V1 of the cloth winding roller (4), conveying the cloth from the first rubber roller set (2) to the second rubber roller set (3) for L1 length, controlling the sliding cycle time T2 of the image pickup module (53) through a control system, wherein the sliding cycle time T2 is defined as the time of accumulated strokes of the image pickup module (53) from one end of a guide rail (511) to the other end of the guide rail, when the image pickup module (53) is in a forward sliding stroke, and the image pickup module (53) is provided with a first light source (532), the first light source (532) is turned on, meanwhile, the second light source (543) is turned off, all the effective view finding areas of the forward sliding strokes acquired through the image pickup module (53) are overlapped with each other to form a second forward aggregate image area, when the image pickup module (53) is in a reverse sliding stroke, turning on the second light source (543) of the light shielding main body (541), and all the second aggregate area can be overlapped with each other to form a second forward aggregate image area, and all the second aggregate area can be overlapped with each other, and at least the second aggregate area is overlapped with each other, and the second aggregate area is overlapped with each other, so that the image area can be overlapped with each other;

12. A cloth inspection method for an open width cloth rewinder according to claim 10 or 11, characterized by controlling the slip cycle time T2 of the camera module (53) by means of a control system, further comprising:

based on a preset running speed V1 of the cloth rolling roller (4), the visual field longitudinal detection distance H of the camera module (53) is obtained, and the time T3=H/V1 of the cloth passing through the visual field longitudinal detection distance H is obtained, and the sliding cycle time T2 is less than or equal to T3.

13. The cloth inspection method for an open width fabric winding machine according to claim 12, wherein the frame rate FR of the image pickup module (53) is obtained based on the cloth width WB, the field transverse inspection distance W of the image pickup module (53), and the slip cycle time T2, wherein FR is a positive integer, and FR is equal to or greater than 2 WB/(w×t2).