CN117740814A - Online detection device and detection method in textile knitting forming based on machine vision - Google Patents
Online detection device and detection method in textile knitting forming based on machine vision Download PDFInfo
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- CN117740814A CN117740814A CN202410192863.7A CN202410192863A CN117740814A CN 117740814 A CN117740814 A CN 117740814A CN 202410192863 A CN202410192863 A CN 202410192863A CN 117740814 A CN117740814 A CN 117740814A
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- 238000001514 detection method Methods 0.000 title claims abstract description 41
- 238000009940 knitting Methods 0.000 title claims abstract description 25
- 239000004753 textile Substances 0.000 title claims abstract description 22
- 239000004744 fabric Substances 0.000 claims abstract description 81
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000003825 pressing Methods 0.000 claims description 21
- 238000004040 coloring Methods 0.000 claims description 17
- 230000000007 visual effect Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 8
- 230000001502 supplementing effect Effects 0.000 claims description 8
- 230000000712 assembly Effects 0.000 claims description 7
- 238000000429 assembly Methods 0.000 claims description 7
- 238000009941 weaving Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000009954 braiding Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims 2
- 238000005192 partition Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000000877 morphologic effect Effects 0.000 description 2
- 238000003326 Quality management system Methods 0.000 description 1
- 238000013473 artificial intelligence Methods 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000013135 deep learning Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to the technical field of textile knitting detection, in particular to an online detection device and a detection method in textile knitting forming based on machine vision. The device comprises a shell, a feeding roller and a receiving roller. The woven and molded cloth blank is fixed on the feeding roller and penetrates through the shell to be connected with the material receiving roller. The housing includes a first vision capturing area and a second vision capturing area with a first image capturing device on top. The second vision capturing area comprises a second image capturing device arranged at the top of the second vision capturing area and a movable light-emitting component, the movable light-emitting component is arranged at the bottom of the second vision capturing area and is contacted with the movable light-emitting component when the cloth blank passes through the second vision capturing area, and a plurality of light-emitting pieces are arranged on the movable light-emitting component. According to the invention, the detection device is arranged in the partition to perform secondary detection on the cloth blank, so that the flaw capturing precision is improved, and the luminous moving assembly is arranged to slightly pull the cloth blank and simultaneously emit light, so that the recognition difficulty of the image pickup device is reduced.
Description
Technical Field
The invention relates to the technical field of textile knitting detection, in particular to an online detection device and a detection method in textile knitting forming based on machine vision.
Background
Machine vision is an important branch of rapid development of artificial intelligence, in short, machine vision is to replace human eyes by a machine to make measurement and judgment, and the machine vision converts a shot target into an image signal through a machine vision product (namely an image shooting device, namely a CMOS (complementary metal oxide semiconductor) and a CCD (charge coupled device), and transmits the image signal to a special image processing system to obtain morphological information of the shot target, and the morphological information is converted into a digital signal according to pixel distribution, brightness, color and other information; the image system performs various operations on these signals to extract characteristics of the object, and further controls the operation of the on-site device according to the result of the discrimination. The machine vision is widely applied to weaving detection, acquires the defect image on cloth by carrying an artificial human eye vision system, and then completes the functions of processing the defect image, analyzing the algorithm, displaying detection results, outputting alarm, recording and storing data and the like by an intelligent quality management system platform based on a deep learning algorithm which is independently researched and developed. However, in the process of weaving and knitting, because the elasticity of the cloth itself causes defects that are difficult to identify through simple image capturing, and the machine vision has a severe requirement for ambient light, if insufficient light occurs, the detection effect is greatly reduced.
Disclosure of Invention
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings hereof.
The invention aims to overcome the defects and provide an online detection device and a detection method in textile knitting forming based on machine vision, which have the advantages of high detection precision, low machine recognition difficulty and good detection effect on elastic cloth.
In order to achieve the above object, in a first aspect, the present invention provides an on-line detection device in textile knitting forming based on machine vision, which comprises a housing, a feeding roller and a receiving roller. The woven and molded cloth blank is fixed on the feeding roller and penetrates through the shell to be connected with the material receiving roller. The housing includes a first vision capturing area and a second vision capturing area with a first image capturing device on top. The second vision capturing area comprises a second image capturing device arranged at the top of the second vision capturing area and a movable light-emitting component, the movable light-emitting component is arranged at the bottom of the second vision capturing area and is contacted with the movable light-emitting component when the cloth blank passes through the second vision capturing area, a plurality of light-emitting pieces are arranged on the movable light-emitting component, and the movable light-emitting component can repeatedly move along the vertical direction of the movement of the cloth blank.
In some embodiments, the mobile lighting assembly includes a conveyor belt, a mobile box disposed above the conveyor belt, and a roller disposed on top of the mobile box. The luminous piece is connected with the movable box and arranged at two sides of the roller.
In some embodiments, the second vision capturing area further includes at least two fixing components, the two fixing components are respectively disposed on two sides of the movable light emitting component, the fixing components include a pressing plate, an auxiliary plate and a lifting rod, the lifting rod is connected with the top of the second vision capturing area and the pressing plate, the auxiliary plate is disposed below the cloth blank and corresponds to the pressing plate in position, and the lifting rod is started to extend to enable the pressing plate and the auxiliary plate to jointly fix the cloth blank.
In some embodiments, the fixing assembly further includes a light shielding member, one side of the light shielding member is connected to the pressing plate, the other side of the light shielding member is connected to the top of the second vision capturing area, and the light shielding member cooperates with the housing to reduce brightness of the second vision capturing area.
In some embodiments, the fixing assembly further comprises a plurality of marking assemblies, the marking assemblies are connected with the pressing plate, and signals are transmitted when the second image capturing device collects flaws on the cloth blank, so that the marking assemblies leave calibration points on the cloth blank.
In some embodiments, the marking assembly includes a limiting ring, a coloring column and a driving motor, the limiting ring is disposed above the pressing plate, the coloring column is disposed in the limiting ring, a channel for the coloring column to move is disposed on the pressing plate, the driving motor is disposed above the coloring column and connected with the limiting ring, and the driving motor controls the coloring column to move up and down.
In some embodiments, the marking assembly further comprises a spring member, the color column extends circumferentially with a boss, and the spring member is disposed below the boss and abuts against the compacting plate.
In some embodiments, a plurality of light supplementing lamps are arranged on the side wall of the first vision capturing area, and a light blocking shed is arranged above the light supplementing lamps.
In a second aspect, the present invention provides an online detection method in textile knitting forming based on machine vision, which adopts the detection device as described above, and specifically comprises the following steps:
s1: fixing the rolled formed cloth blank on the feeding roller, fixing the cloth blank on the receiving roller under manual traction, and then starting the feeding roller and the receiving roller to rotate so as to keep the cloth blank in a tight conveying state in the shell;
s2, the cloth blank enters the first visual capturing area, the first image capturing device automatically identifies the surface of the cloth blank in a tight state, and when detecting that the surface of the cloth blank contains holes/surface irregularities exceeding a preset area range, the first image capturing device sends a signal to the control system and gives an alarm.
S3: when the cloth blank enters the target length, the lifting rod descends to enable the pressing plate and the auxiliary plate to fix the cloth blank, then the movable light-emitting component is started to move below the cloth blank, the second image pickup device recognizes the light-emitting condition of part of the cloth blank supported in the moving process of the movable light-emitting component, when the non-uniform light is detected, a signal is transmitted to the control system and the marking component, and the marking component leaves a calibration point on the cloth blank.
S4: and (3) after the detection of the whole cloth blank is finished, rechecking the cloth blank with an alarm, determining the approximate range of the abnormal braiding part according to the calibration point, and comparing the corresponding images/manually searching the position to be repaired.
By adopting the technical scheme, the invention has the beneficial effects that:
according to the invention, the detection device with the partition is arranged, so that secondary image capturing is performed on the surface of the cloth blank, and the defect capturing precision is improved; the first visual capturing area is arranged to collect the whole information of the cloth blank in a loose state; the second vision capturing area is matched with the luminous moving component moving along the vertical direction of the cloth blank, and the luminous moving component slightly pulls the cloth blank and emits light simultaneously because the luminous moving component is higher than the position of the cloth blank when moving below the cloth blank, so that the elastic cloth is stretched longitudinally to enable the cloth blank to be displayed more completely, part of flaws are prevented from being hidden by elasticity of the cloth blank, the second image capturing device captures light under the darker condition, the light requirement in the capturing process is further reduced, and the recognition difficulty of the image capturing device is reduced.
According to the invention, the fixing assemblies are arranged on two sides of the luminous moving assembly, so that the height of the cloth blank can be lower than that of the luminous moving assembly, the cloth blank can be kept in a tight state in the process of receiving the movement of the luminous moving assembly, and the tensile strength of the luminous moving assembly is ensured; set up the light shielding piece, the light of isolated first vision capture district and second vision capture district reduces the light influence of first vision capture district to the second vision capture district: and a marking assembly is arranged to mark and divide the area where the flaw is detected, so that the flaw is repaired in the later period.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
It is apparent that these and other objects of the present invention will become more apparent from the following detailed description of the preferred embodiments, which is to be read in connection with the accompanying drawings and figures.
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of the preferred embodiments, as illustrated in the accompanying drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention, without limitation to the invention.
In the drawings, like parts are designated with like reference numerals and are illustrated schematically and are not necessarily drawn to scale.
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only one or several embodiments of the invention, and that other drawings can be obtained according to such drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram of the internal structure of an on-line detection device in the weaving and knitting forming based on machine vision;
FIG. 2 is an exploded view of the internal structure of a second vision capturing zone of the on-line detection device in the machine vision based textile knitting forming of the present invention;
FIG. 3 is a side cross-sectional view of a marking assembly of the on-line detection device in machine vision based textile knitting forming of the present invention;
FIG. 4 is a diagram showing the structure of a moving box part of the on-line detecting device in the weaving and knitting forming based on machine vision;
fig. 5 is a diagram showing a structure of a light compensating lamp of an on-line detecting device in the weaving and knitting forming based on machine vision.
The main reference numerals illustrate:
1. a housing;
11. a first visual capture area;
11a, a first image pickup device;
11b, a light supplementing lamp;
11c, a light blocking shed;
12. a second visual capture area;
12a, a second image pickup device;
12b, moving the light emitting assembly;
2b1, a luminous element;
2b2. A conveyor belt;
2b3, moving the box;
2b4, a roller;
12c, fixing the assembly;
2c1, tightly pressing the plate;
2c2, an auxiliary plate;
2c3, lifting rods;
2c4, a shading piece;
2c5, marking the assembly;
c51. limiting ring, c52, coloring column, c53, driving motor, c54, spring piece, c55 and boss;
2. a feed roller;
3. and a material receiving roller.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following detailed description. It should be understood that the detailed description is presented merely to illustrate the invention, and is not intended to limit the invention.
In addition, in the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. However, it is noted that direct connection indicates that the two bodies connected together do not form a connection relationship through a transition structure, but are connected together to form a whole through a connection structure. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In a first aspect, the invention provides an on-line detection device in textile knitting forming based on machine vision. Referring to fig. 1, the detecting device comprises a housing 1, a feeding roller 2 and a receiving roller 3.
The woven and molded cloth blank is fixed on the feeding roller 2 and passes through the shell 1 to be connected with the receiving roller 3, and the shell 1 can be divided into a plurality of areas, wherein the areas comprise a first visual capturing area 11 and a second visual capturing area 12.
The top of the first vision capturing area 11 is provided with a first image capturing device 11a, the side wall of the first vision capturing area 11 is provided with a plurality of light supplementing lamps 11b, a light blocking shed 11c is arranged above the light supplementing lamps 11b, and the light blocking shed 11c enables light rays of the light supplementing lamps 11b to face downwards.
Referring to fig. 2, the second visual-capturing zone 12 includes a second image capturing device 12a, a mobile light emitting component 12b and at least two fixed components 12c.
The second image capturing device 12a is disposed on top of the second visual capturing area 12, and the second image capturing device 12a may be plural and arranged in a matrix. The movable light emitting component 12b is disposed at the bottom of the second visual capturing area 12, and the top of the movable light emitting component 12b is higher than the original height of the cloth blank so that the cloth blank contacts with the movable light emitting component 12b when passing through the second visual capturing area 12. The movable light emitting component 12b comprises a conveyor belt 2b2, a movable box 2b3, a roller 2b4 and light emitting elements 2b1, wherein the conveyor belt 2b2 is provided with two driving rods connected with the same driving rod, the movable box 2b3 is arranged above the conveyor belt 2b2, the roller 2b4 is rotatably arranged at the top of the movable box 2b3, the light emitting elements 2b1 are connected with the movable box 2b3 and are arranged at two sides of the roller 2b4, the light emitting elements 2b1 can be a plurality of light beads which are arranged in parallel or can be light bars, and the movable light emitting component 12b can repeatedly move along the vertical direction of the movement of the cloth blank.
The two fixing members are respectively disposed at two sides of the movable light emitting component 12b, and the fixed component 12c includes a pressing plate 2c1, an auxiliary plate 2c2, a lifting rod 2c3, a light shielding member 2c4 and a plurality of marking components 2c5. The lifting rod 2c3 connects the top of the second vision capturing area 12 and the pressing plate 2c1, the auxiliary plate 2c2 is arranged below the cloth blank and corresponds to the pressing plate 2c1 in position, and the lifting rod 2c3 is started to extend so that the pressing plate 2c1 and the auxiliary plate 2c2 jointly fix the cloth blank. One side of the shading piece 2c4 is connected with the pressing plate 2c1, the other side of the shading piece 2c4 is connected with the top of the second vision capturing area 12, the shading piece 2c4 can be a blind or cloth with shading effect, the cloth is coiled and contracted at the top of the second vision capturing area 12, return springs are arranged at two ends of the cloth and automatically contracted under the condition of not receiving tensile force, and the shading piece 2c4 and the shell 1 jointly act to reduce the brightness of the second vision capturing area 12. The marking assembly 2c5 is connected to the pinch plate 2c1 and signals are sent when the second image capture device 12a collects flaws in the blank, causing the marking assembly 2c5 to leave a calibration point on the blank. The marking assembly 2c5 includes a retainer ring c51, a color column c52, a drive motor c53, and a spring member c54. The limiting ring c51 is arranged above the compacting plate 2c1, the coloring column c52 is arranged in the limiting ring c51, the coloring column c52 is filled with pigment which can mark on textiles and is convenient to remove, such as water powder, a channel for the coloring column c52 to move is arranged on the compacting plate 2c1, the driving motor c53 is arranged above the coloring column c52 and is connected with the limiting ring c51, the driving motor c53 can be an electric telescopic rod or a rotating motor with a screw rod, the screw rod is in threaded connection with the coloring column c52, and the driving motor c53 is used for controlling the coloring column c52 to move up and down. The color column c52 extends circumferentially with a boss c55, and the spring member c54 is disposed below the boss c55 and abuts against the compacting plate 2c1.
In a second aspect, the invention provides an online detection method in textile knitting forming based on machine vision, which adopts the detection device, and specifically comprises the following steps:
s1: fixing the rolled formed cloth blank on the feeding roller 2, fixing the cloth blank on the receiving roller 3 under manual traction, and then starting the feeding roller 2 and the receiving roller 3 to rotate so as to keep the cloth blank in a tight conveying state in the shell 1;
s2, the cloth blank enters the first visual capturing area 11, the first image capturing device 11a automatically identifies the surface of the cloth blank in a tight state, and when detecting that the surface of the cloth blank contains holes/uneven surface which exceed the preset area range, the cloth blank transmits a signal to a control system and gives an alarm;
s3: when the cloth blank enters the target length, the lifting rod 2c3 descends to enable the pressing plate 2c1 and the auxiliary plate 2c2 to fix the cloth blank, then the movable light-emitting component 12b is started to move below the cloth blank, the second image pickup device 12a recognizes the light-emitting condition of part of the cloth blank supported in the moving process of the movable light-emitting component 12b, when the non-uniform light is detected, a signal is transmitted to the control system and the marking component 2c5, and the marking component 2c5 leaves a calibration point on the cloth blank;
s4: and (3) after the detection of the whole cloth blank is finished, rechecking the cloth blank with an alarm, determining the approximate range of the abnormal braiding part according to the calibration point, and comparing the corresponding images/manually searching the position to be repaired.
It is to be understood that the disclosed embodiments are not limited to the specific process steps or materials disclosed herein, but are intended to extend to equivalents of such features as would be understood by one of ordinary skill in the relevant arts. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.
Reference in the specification to "an embodiment" means that a particular feature, or characteristic, described in connection with the embodiment is included in at least one embodiment of the invention. Thus, appearances of the phrase or "an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment.
Furthermore, the described features or characteristics may be combined in any other suitable manner in one or more embodiments. In the above description, certain specific details are provided, such as thicknesses, numbers, etc., to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention can be practiced without one or more of the specific details, or with other methods, components, materials, etc.
Claims (9)
1. The utility model provides an on-line measuring device in weaving shaping based on machine vision, a serial communication port, including casing (1), feed roller (2) and receipts material roller (3), the cloth base after the weaving shaping is fixed on this feed roller (2) and passes this casing (1) and be connected with this receipts material roller (3), this casing (1) is equipped with first vision capturing zone (11) and second vision capturing zone (12) including first image capturing zone (11 a) at the top, this second vision capturing zone (12) include second image capturing device (12 a) and remove luminous component (12 b), this second image capturing device (12 a) is located the top of this second vision capturing zone (12), this removes luminous component (12 b) and locates the bottom of this second vision capturing zone (12) and the cloth base is contacted with this removal luminous component (12 b) when this second vision capturing zone (12), be equipped with a plurality of light-emitting piece (2 b 1) on this removal luminous component (12 b), this removal luminous component (12 b) can move along the vertical direction that the cloth base can reciprocate.
2. The machine vision-based on-line detection device for textile knitting forming according to claim 1, characterized in that the movable lighting component (12 b) further comprises a conveyor belt (2 b 2), a movable box (2 b 3) and a roller (2 b 4), wherein the movable box (2 b 3) is arranged above the conveyor belt (2 b 2), the roller (2 b 4) is rotatably arranged at the top of the movable box (2 b 3), and the lighting component (2 b 1) is connected with the movable box (2 b 3) and arranged at two sides of the roller (2 b 4).
3. The machine vision-based on-line detection device for textile knitting forming according to claim 1, characterized in that the second vision capturing area (12) further comprises at least two fixing components (12 c), the two fixing components are respectively arranged on two sides of the movable light emitting component (12 b), the fixing components (12 c) comprise a pressing plate (2 c 1), an auxiliary plate (2 c 2) and a lifting rod (2 c 3), the lifting rod (2 c 3) is connected with the top of the second vision capturing area (12) and the pressing plate (2 c 1), the auxiliary plate (2 c 2) is arranged below a cloth blank and corresponds to the pressing plate (2 c 1), and the lifting rod (2 c 3) is started to stretch so that the pressing plate (2 c 1) and the auxiliary plate (2 c 2) jointly fix the cloth blank.
4. A machine vision based on-line detection device in textile knitting forming according to claim 3, characterized in that the fixing assembly (12 c) further comprises a light shielding member (2 c 4), one side of the light shielding member (2 c 4) is connected to the compacting plate (2 c 1), the other side of the light shielding member (2 c 4) is connected to the top of the second vision capturing area (12), the light shielding member (2 c 4) cooperates with the housing (1) to reduce the brightness of the second vision capturing area (12).
5. A machine vision based on-line detection device in textile knitting forming according to claim 3, characterized in that the fixing assembly (12 c) further comprises a number of marking assemblies (2 c 5), the marking assemblies (2 c 5) being connected to the compacting plate (2 c 1), and when the second image pick-up means (12 a) collect flaws on the cloth blank, signals are transmitted, causing the marking assemblies (2 c 5) to leave calibration points on the cloth blank.
6. The machine vision-based on-line detection device for textile knitting forming according to claim 5, characterized in that the marking component (2 c 5) comprises a limiting ring (c 51), a coloring column (c 52) and a driving motor (c 53), wherein the limiting ring (c 51) is arranged above the compacting plate (2 c 1), the coloring column (c 52) is arranged in the limiting ring (c 51), a channel for the coloring column (c 52) to move is arranged on the compacting plate (2 c 1), the driving motor (c 53) is arranged above the coloring column (c 52) and is connected with the limiting ring (c 51), and the driving motor (c 53) controls the coloring column (c 52) to move up and down.
7. The machine vision-based on-line detection device for textile knitting forming according to claim 6, characterized in that the marking assembly (2 c 5) further comprises a spring member (c 54), the colored column (c 52) extends circumferentially with a boss (c 55), and the spring member (c 54) is arranged below the boss (c 55) and abuts against the compacting plate (2 c 1).
8. The machine vision-based on-line detection device for textile knitting forming according to claim 1, wherein a plurality of light supplementing lamps (11 b) are arranged on the side wall of the first vision capturing area (11), and a light blocking shed (11 c) is arranged above the light supplementing lamps (11 b).
9. An online detection method in textile knitting forming based on machine vision, which is characterized by adopting the detection device as claimed in any one of claims 5-7, and comprises the following specific steps:
s1: fixing the coiled formed cloth blank on the feeding roller (2), fixing the cloth blank on the receiving roller (3) under manual traction, and then starting the feeding roller (2) and the receiving roller (3) to rotate so as to keep the cloth blank in a tight conveying state in the shell (1);
s2, the cloth blank enters the first visual capturing area (11), the first image capturing device (11 a) automatically identifies the surface of the cloth blank in a tight state, and when detecting that the surface of the cloth blank contains holes/uneven surface which exceed the range of a preset area, the control system sends a signal and gives an alarm;
s3: when the cloth blank enters the target length, the lifting rod (2 c 3) descends to enable the pressing plate (2 c 1) and the auxiliary plate (2 c 2) to fix the cloth blank, then the movable light-emitting component (12 b) is started to move below the cloth blank, the second image pickup device (12 a) recognizes the light-emitting condition of a part of the cloth blank supported in the moving process of the movable light-emitting component (12 b), when the non-uniform light is detected, a signal is transmitted to the control system and the marking component (2 c 5), and the marking component (2 c 5) leaves a calibration point on the cloth blank;
s4: and (3) after the detection of the whole cloth blank is finished, rechecking the cloth blank with an alarm, determining the approximate range of the abnormal braiding part according to the calibration point, and comparing the corresponding images/manually searching the position to be repaired.
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