Carpet surface flaw detection device

Abstract

The invention relates to the field of carpet detection, in particular to a carpet surface flaw detection device which comprises a carpet body, light source assemblies arranged at the front end and the rear end of the carpet body and first suction assemblies connected to the light source assemblies. The suction structures are arranged at the upper end and the lower end of the straight carpet respectively, the same attraction force is applied to the upper end face and the lower end face of the carpet through the suction structures, yarn stretching out of the suede face can be influenced by the attraction force applied by the suction structures, meanwhile, the oblique light sources are arranged on one sides of the industrial cameras, and therefore the yarn stretching out of the suede face can be influenced. A light source is arranged on the carpet, a pattern lampshade is arranged on the light source, the light source penetrates through the pattern lampshade to irradiate a refractor installed at the front end of the carpet, the refracted light source stretches across the carpet and is projected to a light sensing plate arranged at the rear end of the carpet, and then a pattern projected on the light sensing plate is shot through a second industrial camera. And whether the pattern on the photosensitive plate is in a complete state is compared to detect whether the carpet surface has a wrong weaving phenomenon.

Description

Technical Field

[0001] The invention relates to the field of carpet detection, and in particular to a carpet surface defect detection device. Background Art

[0002] Carpets are floor coverings made of natural fibers such as cotton, linen, wool, silk, and grass yarns, or chemical synthetic fibers, which are knitted, piled, or woven by hand or mechanical processes. In the process of weaving carpets, weaving errors are inevitable, and there are many reasons for weaving errors, such as yarn throwing, yarn mixing, or yarn hooking. When yarn throwing occurs, part of the yarn extends from the pile surface, which will cause uneven distribution of yarn on the carpet surface, and then cause pits or bumps on the carpet surface. After the existing carpets are produced, they need to be rolled up, and the defects on the surface need to be detected during the rolling process.

[0003] Existing defect detection mostly relies on industrial cameras. The surface of the carpet is photographed by a vertically arranged industrial camera. After the shooting is completed, the picture is compared with the standard picture to detect whether there are defects on the carpet surface. When a carpet with miswoven yarn is rolled up, the weaving line is thicker and the weaving shape and pattern of the existing carpet are often more complicated. In addition, the industrial camera is arranged vertically, which can easily lead to pits or protrusions in the vertical shot when taking pictures, making the taken picture difficult to compare with the standard picture, so extra time is required for manual identification.

[0004] Therefore, during the surface defect detection process of the above-mentioned carpet, when the wrongly woven carpet is rolled up, the weaving shape and pattern of the carpet are often complicated, which makes it difficult for the industrial camera to identify it, thereby affecting the efficiency of carpet defect detection. Summary of the invention

[0005] In order to overcome the problem that during the defect detection process of existing carpets, the industrial camera is difficult to identify the photographed photos due to the pits and protrusions caused by the vertically arranged industrial camera and the protruding thread ends.

[0006] The technical solution of the present invention is: a carpet surface defect detection device, including a carpet main body, and also including a light source assembly arranged at the front and rear ends of the carpet main body, a first suction assembly connected to the light source assembly, a light detection assembly connected to the first suction assembly, a second suction assembly connected to the light detection assembly, two lifting assemblies connected to the second suction assembly, and a light-shielding assembly connected to the lifting assembly, wherein the light source assembly is used to project a light source onto the light detection assembly, the first suction assembly and the second suction assembly are used to suck air inside the light detection assembly, the lifting assembly is used to lift a portion of the carpet main body once, and the light-shielding assembly is used to lift a portion of the carpet main body twice;

[0007] The light source assembly includes a first side bracket arranged at the rear end of the carpet body, a second side bracket arranged at the front end of the carpet body, a fixed lamp bracket connected to the second side bracket, a light source connected to the fixed lamp bracket, a pattern lampshade connected to the light source, and two first fixing bars respectively connected to the first side bracket and the second side bracket, the light source is used to emit a linear light source and pass through the pattern lampshade, and the pattern lampshade is used to shield the linear light source and form a projection of a corresponding shape;

[0008] The light detection assembly includes a lower suction assembly connected between two first side brackets, an upper suction assembly arranged at the upper end of the lower suction assembly, abutment rollers respectively connected to the lower suction assembly and the upper suction assembly, and a refraction projection assembly connected to the first side bracket, wherein the upper suction assembly and the lower suction assembly are respectively used to apply negative pressure of set values ​​on the upper and lower surfaces of the carpet body and drive the thread ends on the upper and lower surfaces of the carpet body to deform by the negative pressure, and the refraction projection assembly is used to project a linear light source onto the refraction projection assembly and record the projected pattern.

[0009] Preferably, the refraction projection assembly comprises a connecting piece connected to the first fixing strip on the second side bracket, a refractor movably connected to the connecting piece, and a photosensitive plate connected to the first fixing strip on the first side bracket, the refractor is used to refract the linear light source emitted by the light source and make it pass between the lower suction assembly and the upper suction assembly, and the photosensitive plate is used to project the linear light source;

[0010] Preferably, the lower suction assembly comprises a lower air hood connected to the first fixing bar and a second industrial camera connected to the lower air hood, wherein the lower air hood is used to mask a portion of the lower surface of the carpet body, and the second industrial camera is used to photograph and record a projection pattern projected on the photosensitive plate;

[0011] The upper suction assembly includes an upper air hood connected to the upper end abutment roller, a first industrial camera connected to the upper air hood, and light-through slots respectively provided on the upper air hood and the lower air hood. A light-emitting lamp is provided on the inner wall of the upper air hood. The first industrial camera is used to photograph the upper surface of a portion of the carpet body.

[0012] Preferably, the first suction assembly includes a second air pipe connected to the upper air hood, a first three-way connector connected to the second air pipe, a first air pipe connected to the first three-way connector, a first self-priming pump connected to the first air pipe, a pump base connected to the first self-priming pump, and a fixing frame connected to the front and rear ends of the pump base, the output end of the first self-priming pump is connected to the first air pipe, the second air pipe is connected to the first air pipe through the first three-way connector, and the first self-priming pump is used to suck part of the thread ends extending out of the upper surface of the carpet body.

[0013] Preferably, the lifting assembly includes a clamping and lifting assembly movably connected to the light source assembly, a displacement adjustment assembly connected to the clamping and lifting assembly, and a moving assembly connected to the displacement adjustment assembly, the clamping and lifting assembly is used to clamp the carpet body and move the carpet body in a vertical direction, the displacement adjustment assembly is used to move the light shielding assembly horizontally, and the moving assembly is used to move the displacement adjustment assembly horizontally.

[0014] Preferably, the clamping and lifting assembly includes a second fixing bar movably connected to the first side bracket and the second side bracket, a mounting bar connected to the second fixing bar, a first screw slider connected to the mounting bar, a first screw slide rail movably connected to the first screw slider, a middle block connected to the first screw slider, a second screw slide rail connected to the middle block, a bidirectional screw movably connected to the second screw slide rail, two second screw sliders with clearance fit on the bidirectional screw, a roller frame connected to the second screw slider, an abutting roller movably connected to the roller frame and a second motor connected to the second screw slide rail, the upper and lower ends of the bidirectional screw are arranged in opposite directions, and the abutting roller is used to assist the carpet body in moving.

[0015] Preferably, the displacement adjustment assembly includes a pushing frame connected to the first screw slide rail, a fourth hydraulic cylinder connected to the pushing frame, a combination bar connected to the fourth hydraulic cylinder, a connecting bar connected to the combination bar, and a positioning rod connected to the combination bar, and the positioning rod is used to assist the fourth hydraulic cylinder in horizontal extension and retraction.

[0016] Preferably, the moving component includes a fixed slider connected to a connecting bar, a fixed slide rail movably connected to the fixed slider, an engaging rack connected to the fixed slide rail, a wheel frame connected to the fixed slider, a driving gear plate movably connected to the wheel frame, and a first motor connected to the wheel frame, the driving gear plate and the engaging rack are configured to mesh, and the meshing driving gear plate and the engaging rack are used to drive the fixed slider to slide in the fixed slide rail.

[0017] Preferably, the light-shielding assembly includes a first hydraulic cylinder connected to a connecting strip, a pushing plate connected to the first hydraulic cylinder, a second hydraulic cylinder connected to the pushing plate, a fixed plate connected to the second hydraulic cylinder, a third hydraulic cylinder connected to the fixed plate, and a lifting plate connected to the third hydraulic cylinder, and the third hydraulic cylinder is used to drive the two lifting plates to move the carpet body in a vertical direction.

[0018] Preferably, the second suction assembly includes a positioning leg connected to a fixed slide rail, a pump plate connected to the positioning leg near the first self-priming pump, a second self-priming pump connected to the pump plate, a third air pipe connected to the output end of the second self-priming pump, a second three-way head connected to the third air pipe, and a fourth air pipe connected to the second three-way head, the fourth air pipe is connected to the lower air hood, the second self-priming pump is used to suck part of the thread ends extending out of the lower surface of the carpet body, and the third air pipe is connected to the fourth air pipe through the second three-way head.

[0019] Beneficial effects of the present invention:

[0020] 1. On the basis of the conventional defect detection device, the detection structure is modified. A suction structure is respectively arranged at the upper and lower ends of the flat carpet. The suction structure applies the same attraction to the upper and lower end surfaces of the carpet, so that the yarn extending from the pile surface can be affected by the attraction applied by the suction structure and sway on the carpet surface. At the same time, an oblique light source is arranged on one side of the industrial camera, and a pattern lampshade is arranged on the light source, so that the light source can pass through the pattern lampshade and illuminate the refractor installed on the front end of the carpet, and the refracted light source spans the carpet and is projected onto the photosensitive plate arranged at the rear end of the carpet. Then, the second industrial camera is used to shoot the pattern projected on the photosensitive plate, and the pattern on the photosensitive plate is compared to see whether it is in a complete state to detect whether there is a mis-knitting phenomenon on the carpet surface. Moreover, through the effect of bidirectional attraction of the upper and lower surfaces of the carpet, the thread ends extending from the pile surface of the carpet can be exposed at the same time on the upper and lower sides, thereby greatly improving the defect detection efficiency of the entire carpet;

[0021] 2. The obliquely arranged light source will refract and cross the surface of the carpet horizontally, so that the industrial camera will encounter additional light source influence when shooting, which will affect the contrast and clarity of the industrial camera to a certain extent. By arranging an intermittently raised lifting plate at the lower end of the light source, when the projection detection of a distance proportional to the length of the lifting plate is completed, the lifting platform is raised, and the carpet is lifted above the light source and photographed by the first industrial camera, so as to avoid the influence of the light source on the industrial camera's photography, thereby greatly improving the detection accuracy of the entire defect detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 What is shown is a first three-dimensional structural schematic diagram of the surface defect detection device of the present invention;

[0023] Figure 2 Shown is a second three-dimensional structural schematic diagram of the surface defect detection device of the present invention;

[0024] Figure 3 Shown is a schematic diagram of the three-dimensional structure of the first suction assembly of the surface defect detection device of the present invention;

[0025] Figure 4 Shown is a schematic diagram of the three-dimensional structure of the light source assembly of the surface defect detection device of the present invention;

[0026] Figure 5 Shown is a first three-dimensional structural schematic diagram of the illumination detection component of the surface defect detection device of the present invention;

[0027] Figure 6 Shown is a second three-dimensional structural schematic diagram of the illumination detection component of the surface defect detection device of the present invention;

[0028] Figure 7 Shown is a third three-dimensional structural schematic diagram of the illumination detection component of the surface defect detection device of the present invention;

[0029] Figure 8 Shown is a schematic diagram of the three-dimensional structure of the lifting assembly of the surface defect detection device of the present invention;

[0030] Fig. 9 Shown is a schematic diagram of the three-dimensional structure of the moving component of the surface defect detection device of the present invention;

[0031] Fig.10 Shown is a schematic diagram of the three-dimensional structure of the second suction assembly of the surface defect detection device of the present invention;

[0032] Fig.11 Shown is a schematic diagram of a first three-dimensional structure of a light-shielding component of a surface defect detection device of the present invention;

[0033] Fig.12 Shown is a second three-dimensional structural schematic diagram of the light-shielding component of the surface defect detection device of the present invention;

[0034] Fig.13 Shown is a schematic diagram of the three-dimensional structure of the displacement adjustment component of the surface defect detection device of the present invention;

[0035] Fig.14 What is shown is a schematic diagram of the three-dimensional structure of the clamping and lifting assembly of the surface defect detection device of the present invention.

[0036] Description of reference numerals: 1. Carpet body; 2. Light source assembly; 3. First suction assembly; 4. Light detection assembly; 5. Lifting assembly; 6. Light shielding assembly; 7. Second suction assembly; 51. Moving assembly; 52. Displacement adjustment assembly; 53. Clamping and lifting assembly; 201. First side bracket; 202. Second side bracket; 203. Fixed lamp bracket; 204. Light source; 205. Pattern lampshade; 206. First fixing strip; 301. Fixed bracket ; 302, pump base; 303, first self-priming pump; 304, first air pipe; 305, first three-way head; 306, second air pipe; 401, upper air cover; 402, first industrial camera; 403, abutting roller; 404, light-through groove; 405, lower air cover; 406, connecting piece; 407, refractor; 408, photosensitive plate; 409, second industrial camera; 601, first hydraulic cylinder; 602, push plate; 603, second hydraulic cylinder cylinder; 604, fixed plate; 605, third hydraulic cylinder; 606, lifting plate; 701, positioning leg; 702, pump plate; 703, second self-priming pump; 704, third air pipe; 705, second three-way head; 706, fourth air pipe; 5101, fixed slide rail; 5102, meshing rack; 5103, fixed slider; 5104, wheel frame; 5105, driving gear disc; 5106, first motor; 5201, connecting strip; 5 202, combination bar; 5203, fourth hydraulic cylinder; 5204, pushing frame; 5205, positioning rod; 5301, first screw guide rail; 5302, first screw slider; 5303, mounting bar; 5304, middle block; 5305, second screw guide rail; 5306, second screw slider; 5307, bidirectional screw; 5308, roller frame; 5309, against the roller; 5310, second motor; 5311, second fixing bar. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0038] A carpet surface defect detection device, according to Figure 1-14As shown, the carpet body 1 includes a light source assembly 2 arranged at the front and rear ends of the carpet body 1, a first suction assembly 3 connected to the light source assembly 2, a light detection assembly 4 connected to the first suction assembly 3, a second suction assembly 7 connected to the light detection assembly 4, two lifting assemblies 5 connected to the second suction assembly 7, and a light shielding assembly 6 connected to the lifting assembly 5, the light source assembly 2 is used to project the light source onto the light detection assembly 4, the first suction assembly 3 and the second suction assembly 7 are used to suck the air inside the light detection assembly 4, the lifting assembly 5 is used to lift part of the carpet body 1 once, and the light shielding assembly 6 is used to lift part of the carpet body 1 twice;

[0039] The light source assembly 2 includes a first side bracket 201 arranged at the rear end of the carpet body 1, a second side bracket 202 arranged at the front end of the carpet body 1, a fixed lamp frame 203 connected to the second side bracket 202, a light source 204 connected to the fixed lamp frame 203, a pattern lampshade 205 connected to the light source 204, and two first fixing strips 206 respectively connected to the first side bracket 201 and the second side bracket 202, the light source 204 is used to emit a linear light source and pass through the pattern lampshade 205, the pattern lampshade 205 is used to shield the linear light source and form a projection of a corresponding shape, the pattern lampshade 205 can be set to different patterns, and the pattern of the pattern lampshade 205 can be changed to adapt to carpet bodies 1 of different specifications and thicknesses;

[0040] The light detection component 4 includes a lower suction component connected between the two first side brackets 201, an upper suction component arranged at the upper end of the lower suction component, abutment rollers 403 respectively connected to the lower suction component and the upper suction component, and a refraction projection component connected to the first side bracket 201. The upper suction component and the lower suction component are respectively used to apply negative pressure of set values ​​on the upper and lower side surfaces of the carpet body 1 and drive the thread ends on the upper and lower side surfaces of the carpet body 1 to deform by the negative pressure. The refraction projection component is used to project a linear light source onto the refraction projection component and record the projected pattern. By setting a plurality of abutment rollers 403, the lower suction component and the upper suction component will not significantly compress the carpet during operation.

[0041] according to Figure 6-Figure 7 As shown, the refraction projection assembly includes a connecting piece 406 connected to the first fixing bar 206 on the second side bracket 202 , a refractor 407 movably connected to the connecting piece 406 , and a photosensitive plate 408 connected to the first fixing bar 206 on the first side bracket 201 .

[0042] It should be noted that the refractor 407 is used to refract the linear light source emitted by the light source 204 and make it pass between the lower suction component and the upper suction component, and the photosensitive plate 408 is used to project the linear light source.

[0043] according to Figure 6-7 As shown, the lower suction assembly includes a lower air hood 405 connected to the first fixing bar 206, and a second industrial camera 409 connected to the lower air hood 405, the lower air hood 405 is used to mask a portion of the lower surface of the carpet body 1, and the second industrial camera 409 is used to shoot and record the projection pattern projected on the photosensitive plate 408;

[0044] according to Figure 5 As shown, the upper suction assembly includes an upper air hood 401 connected to an upper end abutting roller 403, a first industrial camera 402 connected to the upper air hood 401, light-through slots 404 respectively provided on the upper air hood 401 and the lower air hood 405, and a light-emitting lamp is provided on the inner wall of the upper air hood 401.

[0045] It should be noted that the first industrial camera 402 is used to photograph part of the upper surface of the carpet body 1 to detect the surface color difference and pattern of the carpet body 1. The light groove 404 is used to assist the light source to horizontally pass through the carpet body 1. The upper air cover 401 is used to mask part of the upper surface of the carpet body 1. The light provided on the inner wall of the upper air cover 401 assists the first industrial camera 402 in shooting.

[0046] according to Figure 3 As shown, the first suction assembly 3 includes a second air pipe 306 connected to the upper air hood 401, a first three-way connector 305 connected to the second air pipe 306, a first air pipe 304 connected to the first three-way connector 305, a first self-priming pump 303 connected to the first air pipe 304, a pump base 302 connected to the first self-priming pump 303, and a fixing frame 301 connected to the front and rear ends of the pump base 302. The output end of the first self-priming pump 303 is connected to the first air pipe 304, the second air pipe 306 is connected to the first air pipe 304 through the first three-way connector 305, and the first self-priming pump 303 is used to attract part of the thread ends extending out of the upper surface of the carpet body 1.

[0047] according to Figure 8 , Figure 11-Figure 12 As shown, the lifting assembly 5 includes a clamping and lifting assembly 53 movably connected to the light source assembly 2 , a displacement adjustment assembly 52 connected to the clamping and lifting assembly 53 , and a moving assembly 51 connected to the displacement adjustment assembly 52 .

[0048] It should be noted that the clamping and lifting assembly 53 is used to clamp the carpet body 1 and move the carpet body 1 in the vertical direction, the displacement adjustment assembly 52 is used to move the light shielding assembly 6 in the horizontal lateral direction, and the moving assembly 51 is used to move the displacement adjustment assembly 52 in the horizontal longitudinal direction.

[0049] according to Figure 13-14As shown, the clamping and lifting assembly 53 includes a second fixing bar 5311 movably connected to the first side bracket 201 and the second side bracket 202, a mounting bar 5303 connected to the second fixing bar 5311, a first screw slider 5302 connected to the mounting bar 5303, a first screw guide rail 5301 movably connected to the first screw slider 5302, a middle block 5304 connected to the first screw slider 5302, a second screw guide rail 5305 connected to the middle block 5304, and a first screw slider 5302 movably connected to the first screw slider 5302. A bidirectional screw 5307 movably connected to the second screw rail 5305, two second screw sliders 5306 with clearance fit on the bidirectional screw 5307, a roller frame 5308 connected to the second screw slider 5306, a contact roller 5309 movably connected to the roller frame 5308 and a second motor 5310 connected to the second screw rail 5305, the upper and lower ends of the bidirectional screw 5307 are arranged in opposite directions, and the contact roller 5309 is used to assist the carpet body 1 to move.

[0050] It should be noted that the first screw slider 5302 and the first screw rail 5301 cooperate with each other to realize the movement and adjustment of the center section block 5304 and the mounting strip 5303, the second motor 5310 drives the bidirectional screw 5307 to rotate, and the rotating bidirectional screw 5307 drives the two second screw sliders 5306 to move oppositely or towards each other in the second screw rail 5305, so as to adjust the distance between the two abutting rollers 5309.

[0051] according to Fig.13 As shown, the displacement adjustment assembly 52 includes a pushing frame 5204 connected to the first screw slide rail 5301, a fourth hydraulic cylinder 5203 connected to the pushing frame 5204, a combination bar 5202 connected to the fourth hydraulic cylinder 5203, a connecting bar 5201 connected to the combination bar 5202, and a positioning rod 5205 connected to the combination bar 5202.

[0052] It should be noted that the positioning rod 5205 is used to assist the fourth hydraulic cylinder 5203 in horizontal extension and retraction, and the fourth hydraulic cylinder 5203 is used to drive the pushing frame 5204 to move horizontally in the lateral direction, so as to drive the first screw slide rail 5301 to move through the pushing frame 5204.

[0053] according to Fig. 9As shown, the moving component 51 includes a fixed slider 5103 connected to the connecting strip 5201, a fixed slide rail 5101 movably connected to the fixed slider 5103, an engaging rack 5102 connected to the fixed slide rail 5101, a wheel frame 5104 connected to the fixed slider 5103, a driving gear disc 5105 movably connected to the wheel frame 5104, and a first motor 5106 connected to the wheel frame 5104, the driving gear disc 5105 and the engaging rack 5102 are configured to be engaged, and the engaged driving gear disc 5105 and the engaging rack 5102 are used to drive the fixed slider 5103 to slide in the fixed slide rail 5101.

[0054] It should be noted that the driving gear disc 5105 can be driven to rotate by the first motor 5106, and the fixed slider 5103 can be driven to slide in the fixed slide rail 5101 by the mutually meshing driving gear disc 5105 and the meshing rack 5102, so that the sliding fixed slider 5103 can realize the position adjustment of the entire displacement adjustment component 52.

[0055] according to Figure 11-12 As shown, the light-shielding component 6 includes a first hydraulic cylinder 601 connected to the connecting strip 5201, a pushing plate 602 connected to the first hydraulic cylinder 601, a second hydraulic cylinder 603 connected to the pushing plate 602, a fixing plate 604 connected to the second hydraulic cylinder 603, a third hydraulic cylinder 605 connected to the fixing plate 604, and a lifting plate 606 connected to the third hydraulic cylinder 605. The third hydraulic cylinder 605 is used to drive the two lifting plates 606 to drive the carpet body 1 to move in a vertical direction.

[0056] It should be noted that the pushing plate 602 is driven to move by the first hydraulic cylinder 601, and the fixed plate 604 is lifted for a second time by the second hydraulic cylinder 603 installed on the pushing plate 602, so that the third hydraulic cylinder 605 on the fixed plate 604 pushes the lifting plate 606, so that the two combined lifting plates 606 can lift the carpet body 1 located at the lower end of the upper air cover 401, so that the lifted carpet body 1 can be away from the straight light source emitted by the light source 204.

[0057] according to Fig.10 As shown, the second suction assembly 7 includes a positioning leg 701 connected to the fixed slide rail 5101, a pump plate 702 connected to the positioning leg 701 near the first self-priming pump 303, a second self-priming pump 703 connected to the pump plate 702, a third air pipe 704 connected to the output end of the second self-priming pump 703, a second three-way connector 705 connected to the third air pipe 704, and a fourth air pipe 706 connected to the second three-way connector 705, and the fourth air pipe 706 is connected to the lower air hood 405.

[0058] It should be noted that the second self-priming pump 703 is used to suck part of the thread ends extending out of the lower surface of the carpet body 1 , and the third air pipe 704 is connected to the fourth air pipe 706 through the second three-way connector 705 .

[0059] The whole process can simultaneously attract the upper and lower surfaces of the carpet body 1, and make the thread ends extending from the carpet surface fully exposed, and then illuminate the extended thread ends by illuminating the light source to identify the exposed defects, thereby realizing the detection of the miswoven defects located on the upper and lower surfaces of the carpet.

[0060] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A carpet surface defect detection device, comprising a carpet body (1), characterized in that: The carpet body (1) further comprises a light source assembly (2) arranged at the front and rear ends of the carpet body (1), a first suction assembly (3) connected to the light source assembly (2), a light detection assembly (4) connected to the first suction assembly (3), a second suction assembly (7) connected to the light detection assembly (4), two lifting assemblies (5) connected to the second suction assembly (7), and a light shielding assembly (6) connected to the lifting assembly (5), wherein the light source assembly (2) is used to project a light source onto the light detection assembly (4), the first suction assembly (3) and the second suction assembly (7) are used to suck air inside the light detection assembly (4), the lifting assembly (5) is used to lift a portion of the carpet body (1) once, and the light shielding assembly (6) is used to lift a portion of the carpet body (1) twice; The light source assembly (2) comprises a first side bracket (201) arranged at the rear end of the carpet body (1), a second side bracket (202) arranged at the front end of the carpet body (1), a fixed lamp bracket (203) connected to the second side bracket (202), a light source (204) connected to the fixed lamp bracket (203), a pattern lampshade (205) connected to the light source (204), and two first fixing bars (206) respectively connected to the first side bracket (201) and the second side bracket (202), wherein the light source (204) is used to emit a linear light source and pass through the pattern lampshade (205), and the pattern lampshade (205) is used to shield the linear light source and form a projection of a corresponding shape; The light detection assembly (4) comprises a lower suction assembly connected between two first side brackets (201), an upper suction assembly arranged at the upper end of the lower suction assembly, abutting rollers (403) respectively connected to the lower suction assembly and the upper suction assembly, and a refraction projection assembly connected to the first side bracket (201), wherein the upper suction assembly and the lower suction assembly are respectively used to apply a negative pressure of a set value to the upper and lower side surfaces of the carpet body (1) and drive the thread ends on the upper and lower side surfaces of the carpet body (1) to deform by the negative pressure, and the refraction projection assembly is used to project a linear light source onto the refraction projection assembly and record the projected pattern.

2. A carpet surface defect detection device according to claim 1, characterized in that: The refraction projection assembly comprises a connecting piece (406) connected to a first fixing strip (206) on a second side bracket (202), a refractor (407) movably connected to the connecting piece (406), and a photosensitive plate (408) connected to a first fixing strip (206) on a first side bracket (201); the refractor (407) is used to refract a linear light source emitted by a light source (204) and make it pass between a lower suction assembly and an upper suction assembly; and the photosensitive plate (408) is used to project a linear light source.

3. The carpet surface defect detection device according to claim 1, characterized in that: The lower suction assembly comprises a lower air hood (405) connected to the first fixing strip (206), and a second industrial camera (409) connected to the lower air hood (405), wherein the lower air hood (405) is used to cover a portion of the lower surface of the carpet body (1), and the second industrial camera (409) is used to photograph and record a projection pattern projected on the photosensitive plate (408); The upper suction assembly comprises an upper air hood (401) connected to an upper end abutting roller (403), a first industrial camera (402) connected to the upper air hood (401), and light-through slots (404) respectively provided on the upper air hood (401) and the lower air hood (405); a light-emitting lamp is provided on the inner wall of the upper air hood (401); and the first industrial camera (402) is used for photographing a portion of the upper surface of the carpet body (1).

4. The carpet surface defect detection device according to claim 3, characterized in that: The first suction assembly (3) comprises a second air pipe (306) connected to the upper air hood (401), a first three-way connector (305) connected to the second air pipe (306), a first air pipe (304) connected to the first three-way connector (305), a first self-priming pump (303) connected to the first air pipe (304), a pump base (302) connected to the first self-priming pump (303), and a fixing frame (301) connected to the front and rear ends of the pump base (302); the output end of the first self-priming pump (303) is connected to the first air pipe (304); the second air pipe (306) is connected to the first air pipe (304) via the first three-way connector (305); and the first self-priming pump (303) is used to suck part of the thread ends extending out of the upper surface of the carpet body (1).

5. The carpet surface defect detection device according to claim 1, characterized in that: The lifting assembly (5) comprises a clamping and lifting assembly (53) movably connected to the light source assembly (2), a displacement adjustment assembly (52) connected to the clamping and lifting assembly (53), and a moving assembly (51) connected to the displacement adjustment assembly (52); the clamping and lifting assembly (53) is used to clamp the carpet body (1) and move the carpet body (1) in a vertical direction; the displacement adjustment assembly (52) is used to move the light shielding assembly (6) in a horizontal lateral direction; and the moving assembly (51) is used to move the displacement adjustment assembly (52) in a horizontal longitudinal direction.

6. The carpet surface defect detection device according to claim 5, characterized in that: The clamping and lifting assembly (53) comprises a second fixing bar (5311) movably connected to the first side bracket (201) and the second side bracket (202), a mounting bar (5303) connected to the second fixing bar (5311), a first screw slider (5302) connected to the mounting bar (5303), a first screw guide rail (5301) movably connected to the first screw slider (5302), a middle block (5304) connected to the first screw slider (5302), a second screw guide rail (5305) connected to the middle block (5304), and a movable A bidirectional screw (5307) connected to a second screw rail (5305), two second screw sliders (5306) which are loosely fitted on the bidirectional screw (5307), a roller frame (5308) connected to the second screw slider (5306), a contact roller (5309) movably connected to the roller frame (5308), and a second motor (5310) connected to the second screw rail (5305), wherein the upper and lower ends of the bidirectional screw (5307) are arranged in opposite directions, and the contact roller (5309) is used to assist the carpet body (1) in moving.

7. The carpet surface defect detection device according to claim 6, characterized in that: The displacement adjustment component (52) comprises a pushing frame (5204) connected to the first screw rod slide rail (5301), a fourth hydraulic cylinder (5203) connected to the pushing frame (5204), a combination bar (5202) connected to the fourth hydraulic cylinder (5203), a connecting bar (5201) connected to the combination bar (5202), and a positioning rod (5205) connected to the combination bar (5202), wherein the positioning rod (5205) is used to assist the fourth hydraulic cylinder (5203) in horizontal extension and retraction.

8. The carpet surface defect detection device according to claim 7, characterized in that: The moving assembly (51) comprises a fixed slider (5103) connected to a connecting strip (5201), a fixed slide rail (5101) movably connected to the fixed slider (5103), a meshing rack (5102) connected to the fixed slide rail (5101), a wheel frame (5104) connected to the fixed slider (5103), a driving gear disc (5105) movably connected to the wheel frame (5104), and a first motor (5106) connected to the wheel frame (5104), wherein the driving gear disc (5105) and the meshing rack (5102) are arranged to mesh with each other, and the meshing driving gear disc (5105) and the meshing rack (5102) are used to drive the fixed slider (5103) to slide in the fixed slide rail (5101).

9. The carpet surface defect detection device according to claim 7, characterized in that: The light shielding component (6) comprises a first hydraulic cylinder (601) connected to the connecting strip (5201), a pushing plate (602) connected to the first hydraulic cylinder (601), a second hydraulic cylinder (603) connected to the pushing plate (602), a fixing plate (604) connected to the second hydraulic cylinder (603), a third hydraulic cylinder (605) connected to the fixing plate (604), and a lifting plate (606) connected to the third hydraulic cylinder (605), wherein the third hydraulic cylinder (605) is used to drive the two lifting plates (606) to drive the carpet body (1) to move in a vertical direction.

10. The carpet surface defect detection device according to claim 9, characterized in that: The second suction assembly (7) comprises a positioning leg (701) connected to the fixed slide rail (5101), a pump plate (702) connected to the positioning leg (701) near the first self-priming pump (303), a second self-priming pump (703) connected to the pump plate (702), a third air pipe (704) connected to the output end of the second self-priming pump (703), a second three-way connector (705) connected to the third air pipe (704), and a fourth air pipe (706) connected to the second three-way connector (705), wherein the fourth air pipe (706) is connected to the lower air hood (405), the second self-priming pump (703) is used to suck part of the thread ends extending out of the lower surface of the carpet body (1), and the third air pipe (704) and the fourth air pipe (706) are connected via the second three-way connector (705).

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