Surface defect detection device suitable for waterproof coiled material

Abstract

The invention discloses a surface defect detection device applicable to waterproof coiled materials, and belongs to the technical field of waterproof coiled materials, the surface defect detection device applicable to the waterproof coiled materials comprises a first conveying roller, a second conveying roller, a third conveying roller and a fourth conveying roller which are rotatably mounted on a fixing frame, and the surface defect detection device applicable to the waterproof coiled materials further comprises a driving mechanism, a detection mechanism and a cleaning mechanism. According to the cleaning mechanism, the fixing box, the cleaning brush, the square column, a reciprocating lead screw, a round rod, a cleaning roller and a second transmission belt are arranged, a second conveying roller drives the round rod, the reciprocating lead screw and the square column to rotate through the second transmission belt, the cleaning roller arranged on the square column in a sleeving mode rotates synchronously, and the cleaning roller conducts rolling cleaning on the surface of the waterproof coiled material; large particle impurities on the surface of the waterproof roll are removed, the impurities are prevented from interfering with subsequent detection, detection misjudgment is reduced, and the detection accuracy is improved.

Description

Technical Field

[0001] This invention belongs to the field of waterproof membrane technology, and particularly relates to a surface defect detection device applicable to waterproof membranes. Background Technology

[0002] As a core material in building waterproofing projects, the surface quality of waterproof membranes directly determines the waterproofing performance and service life of the project. With the continuous improvement of waterproofing standards in the construction industry, accurate detection of surface defects of membranes has become a key link in ensuring product quality.

[0003] Currently, surface defect detection technology for waterproof membranes has evolved from traditional manual visual inspection to automated inspection. Mainstream technologies include mechanical contact inspection, optical imaging inspection, and ultrasonic inspection. Among these, optical imaging inspection has become the mainstream solution on industrial production lines due to its advantages such as high efficiency and non-contact, non-destructive operation. These devices typically integrate a conveying mechanism, inspection components, and a control unit. They acquire images of the membrane surface using industrial cameras and combine these images with image processing algorithms to identify defects. This technology has been widely used in the production of products such as SBS modified bitumen membranes and polymer waterproof membranes, effectively replacing the subjective, inefficient, and high false negative rates of manual inspection.

[0004] However, existing waterproof membrane surface defect detection devices still have some shortcomings in practical applications: for example, the cleaning mechanism of existing devices mostly adopts a single rotation or linear wiping structure, which can only remove some larger particles of debris from the surface of the membrane, and the cleaning action lacks precise linkage with the membrane conveying speed, which can easily lead to cleaning blind spots or damage to the membrane surface due to relative sliding. Summary of the Invention

[0005] The purpose of this invention is to provide a surface defect detection device suitable for waterproof membranes, which solves the technical problems in the prior art where cleaning mechanisms mostly adopt a single rotation or linear wiping structure, which can only remove some larger particles of debris on the surface of the membrane, and the cleaning action lacks precise linkage with the membrane conveying speed, which easily leads to cleaning blind spots or damage to the membrane surface due to relative sliding.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A surface defect detection device for waterproof membrane includes a first conveying roller, a second conveying roller, a third conveying roller, and a fourth conveying roller rotatably mounted on a fixed frame. It also includes: a drive mechanism for driving the first, second, third, and fourth conveying rollers to rotate simultaneously; a detection mechanism mounted on the fixed frame for detecting surface defects in the waterproof membrane; and a cleaning mechanism for pre-treating and cleaning the surface of the waterproof membrane before it enters the detection station.

[0007] Preferably, the drive mechanism includes: three first transmission belts for connecting the first conveyor roller, the second conveyor roller, the third conveyor roller, and the fourth conveyor roller, so that the first conveyor roller, the second conveyor roller, the third conveyor roller, and the fourth conveyor roller rotate synchronously; and a motor mounted on the fixed frame, with its power output shaft fixedly connected to the third conveyor roller.

[0008] Preferably, the cleaning mechanism includes: a fixed box, mounted on the fixed frame; a square column, one end of which is rotatably connected to the inner wall of the fixed box, and the other end of which is equipped with a reciprocating screw; a round rod, fixedly connected to the reciprocating screw and rotatably connected to the fixed box and the fixed frame; a cleaning roller, slidably sleeved on the square column; and a second transmission belt for connecting the round rod and the second conveying roller.

[0009] Preferably, the cleaning mechanism further includes: a lead screw nut, sleeved on the reciprocating lead screw and slidably connected to the fixed box; a rotating ring, rotatably sleeved on the lead screw nut; and a plurality of connecting rods, one end of which is fixedly connected to the rotating ring and the other end of which is fixedly connected to the cleaning roller.

[0010] Preferably, the cleaning mechanism further includes: a sealing plug, which is inserted into a discharge trough formed at the bottom of the fixed box; and a cleaning wipe, which is installed on the top surface of the fixed box.

[0011] Preferably, the detection mechanism includes: a cylinder rotatably connected to the fixed frame; a connecting plate mounted on the top surface of the cylinder; two horizontal plates, both fixedly connected to the connecting plate; two hinge plates, respectively hinged to the two horizontal plates; and two cameras, respectively mounted on the two hinge plates.

[0012] Preferably, the detection mechanism further includes: two first brackets, respectively installed on the bottom surface of the two horizontal plates; two second brackets, respectively installed on the bottom surface of the two hinge plates; and two limiting plates, the limiting plates being inserted into the first brackets and the second brackets.

[0013] Preferably, the detection mechanism further includes a turntable, which is fixedly sleeved on the cylinder and has anti-slip texture on its outer circumference.

[0014] Preferably, it further includes: a display controller, mounted on the mounting bracket and electrically connected to the two cameras.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The cleaning mechanism in this invention consists of a fixed box, a cleaning wiper, a square column, a reciprocating screw, a round rod, a cleaning roller, and a second transmission belt. The second conveying roller drives the round rod, the reciprocating screw, and the square column to rotate via the second transmission belt, causing the cleaning roller mounted on the square column to rotate synchronously. This allows the cleaning roller to roll and clean the surface of the waterproof membrane, removing larger particles and debris from the surface of the waterproof membrane. This prevents debris from interfering with subsequent testing, reduces testing errors, and improves testing accuracy.

[0016] 2. The cleaning mechanism in this invention is equipped with a lead screw nut, a rotating ring, and a connecting rod. The reciprocating lead screw rotates, causing the lead screw nut to move horizontally back and forth. The rotating ring and connecting rod then drive the cleaning roller to move back and forth along the axial direction of the square column. This allows the cleaning roller to rotate and move back and forth synchronously, making it suitable for waterproof rolls of different widths. It ensures that there are no blind spots on the surface of the roll and solves the problem that single rotation cleaning cannot cover the full width of the roll.

[0017] 3. The detection mechanism in this invention uses a cylinder, a connecting plate, a horizontal plate, and two hinge plates to mount two cameras on the hinge plates respectively. The cylinder can be rotated by the turntable, which enables the cameras to be switched quickly. When one camera needs to be inspected or cleaned, it can be switched to the other camera to continue working without a long downtime, reducing the efficiency loss caused by downtime maintenance. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This invention provides a three-dimensional representation of the surface defect detection device for waterproof membranes. Figure 1 ; Figure 2 This invention provides a three-dimensional representation of the surface defect detection device for waterproof membranes. Figure 2 ; Figure 3 This is a schematic diagram of the assembly structure of the cleaning mechanism and the second conveying roller in this invention; Figure 4 This is an exploded view of the cleaning mechanism in this invention; Figure 5 This invention provides a three-dimensional representation of the surface defect detection device for waterproof membranes. Figure 3 ; Figure 6 In this invention Figure 5 Enlarged schematic diagram of part A; Figure 7 This is a perspective view of the detection mechanism in this invention; Reference numerals: 100, fixed frame; 101, first conveyor roller; 102, second conveyor roller; 103, third conveyor roller; 104, fourth conveyor roller; 105, first transmission belt; 106, motor; 107, display controller; 110, cleaning mechanism; 111, fixed box; 112, sealing plug; 113, cleaning wipe; 114, square column; 115, reciprocating screw; 116, round rod; 117, cleaning roller; 118, screw nut; 1181, rotating ring; 1182, connecting rod; 119, second transmission belt; 120, detection mechanism; 121, cylinder; 1211, connecting plate; 122, turntable; 123, horizontal plate; 124, hinge plate; 125, camera; 126, first bracket; 127, second bracket; 128, limiting plate; 200, waterproof membrane. Detailed Implementation

[0020] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0022] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0023] This invention is described in detail with reference to the accompanying drawings. When detailing the embodiments of this invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not to scale. Furthermore, the accompanying drawings are merely examples and should not be construed as limiting the scope of protection of this invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0024] Furthermore, it should be noted in the description of this invention that the terms "first," "second," or "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" in this invention should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; similarly, they can refer to mechanical connections, electrical connections, or direct connections, or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] Example 1: As Figures 1 to 4 As shown, the surface defect detection device for waterproof membrane includes a first conveyor roller 101, a second conveyor roller 102, a third conveyor roller 103, and a fourth conveyor roller 104 rotatably mounted on a fixed frame 100. The first conveyor roller 101, the second conveyor roller 102, the third conveyor roller 103, and the fourth conveyor roller 104 are used to detect the waterproof membrane 200 on the conveyor belt. The surface defect detection device for waterproof membrane also includes a drive mechanism, a detection mechanism 120, and a cleaning mechanism 110.

[0027] The drive mechanism is used to drive the first conveyor roller 101, the second conveyor roller 102, the third conveyor roller 103 and the fourth conveyor roller 104 to rotate simultaneously; the detection mechanism 120 is installed on the fixed frame 100 and is used to detect surface defects of the waterproof membrane 200; the cleaning mechanism 110 is used to clean the waterproof membrane 200 before detection.

[0028] Specifically, the waterproof membrane 200 to be tested is passed between the first conveyor roller 101, the second conveyor roller 102, the third conveyor roller 103 and the fourth conveyor roller 104, and then the drive mechanism is activated to drive the first conveyor roller 101, the second conveyor roller 102, the third conveyor roller 103 and the fourth conveyor roller 104 to rotate synchronously, thereby moving the waterproof membrane 200 to be tested.

[0029] When the drive mechanism is running, the cleaning mechanism 110 cleans the waterproof membrane 200, and then the inspection mechanism 120 inspects the surface defects of the cleaned waterproof membrane 200.

[0030] like Figure 1 , Figure 2 and Figure 5As shown, the drive mechanism includes three first transmission belts 105 and a motor 106. The three first transmission belts 105 connect the first conveyor roller 101, the second conveyor roller 102, the third conveyor roller 103, and the fourth conveyor roller 104, enabling them to rotate synchronously. The first transmission belts 105 are synchronous toothed belts. Each of the first conveyor roller 101, the second conveyor roller 102, the third conveyor roller 103, and the fourth conveyor roller 104 is equipped with pulleys adapted to the synchronous toothed belts. The motor 106 is mounted on a fixed frame 100, and the power output shaft of the motor 106 is fixedly connected to the third conveyor roller 103.

[0031] Specifically, since the first conveyor roller 101 and the second conveyor roller 102 are connected by a transmission belt, the second conveyor roller 102 and the third conveyor roller 103 are connected by a transmission belt, and the third conveyor roller 103 and the fourth conveyor roller 104 are connected by a transmission belt, when any one of the conveyor rollers rotates, it will drive the other three conveyor rollers to rotate.

[0032] When the motor 106 is running, it will drive the third conveyor roller 103 to rotate, which in turn will drive the first conveyor roller 101, the second conveyor roller 102 and the fourth conveyor roller 104 to rotate.

[0033] like Figure 3 and Figure 4 As shown, the cleaning mechanism 110 includes a fixed box 111, a square column 114, a round rod 116, a cleaning roller 117, and a second transmission belt 119. The fixed box 111 is mounted on the fixed frame 100; one end of the square column 114 is rotatably connected to the inner wall of the fixed box 111, and the other end of the square column 114 is equipped with a reciprocating screw 115; the round rod 116 is fixedly connected to the reciprocating screw 115, and the round rod 116 is rotatably connected to the fixed box 111 and the fixed frame 100; the cleaning roller 117 is slidably sleeved on the square column 114; the cleaning roller 117 includes a roller core and an elastic cleaning layer wrapped around the outer periphery of the roller core, and the elastic cleaning layer is made of wear-resistant nylon brush or polyurethane cleaning cotton.

[0034] The second drive belt 119 is used to connect the round rod 116 and the second conveying roller 102. The second drive belt 119 is a synchronous toothed belt, and both the round rod 116 and the second conveying roller 102 are equipped with pulleys adapted to the synchronous toothed belt.

[0035] Specifically, when the second conveyor roller 102 rotates, it drives the round rod 116 to rotate via the second transmission belt 119, which in turn drives the reciprocating screw 115 to rotate, which in turn drives the square column 114 to rotate. Since the cleaning roller 117 is sleeved on the square column 114, the cleaning roller 117 will also rotate synchronously when the square column 114 rotates. The rotating cleaning roller 117 will clean the waterproof membrane 200, and the debris that falls off after cleaning will fall into the fixed box 111, thereby improving the accuracy of the inspection.

[0036] like Figure 3 and Figure 4 As shown, the cleaning mechanism 110 also includes a lead screw nut 118, a rotating ring 1181, and multiple connecting rods 1182. The lead screw nut 118 is sleeved on the reciprocating lead screw 115 and is slidably connected to the fixed box 111, so that the lead screw nut 118 can only move along the length direction of the reciprocating lead screw 115; the rotating ring 1181 is rotatably sleeved on the lead screw nut 118; one end of the connecting rod 1182 is fixedly connected to the rotating ring 1181, and the other end of the connecting rod 1182 is fixedly connected to the cleaning roller 117.

[0037] Specifically, when the reciprocating screw 115 rotates, the screw nut 118 will reciprocate horizontally, which in turn drives the rotating ring 1181 to reciprocate horizontally, and then drives the cleaning roller 117 to reciprocate horizontally via multiple connecting rods 1182.

[0038] Since the rotating ring 1181 is rotatably connected to the lead screw nut 118, the connection between the rotating ring 1181 and the lead screw nut 118 will not be affected when the connecting rod 1182 and the cleaning roller 117 rotate.

[0039] like Figure 3 and Figure 4 As shown, the cleaning mechanism 110 also includes a sealing plug 112 and a cleaning wipe 113. The sealing plug 112 is inserted into a discharge groove opened at the bottom of the fixed box 111; the cleaning wipe 113 is installed on the inner side of the top surface of the fixed box 111, and the bottom surface of the cleaning wipe 113 is elastically attached to the upper surface of the waterproof membrane 200.

[0040] Specifically, by providing a sealing plug 112, it is easy to remove debris collected inside the fixing box 111. By providing a cleaning wipe 113, it is easy to clean the waterproof membrane 200 that passes through the fixing box 111, thereby improving the accuracy of the measurement.

[0041] like Figures 5 to 7 As shown, the detection mechanism 120 includes a cylinder 121, a turntable 122, a connecting plate 1211, two horizontal plates 123, two hinge plates 124, and two cameras 125.

[0042] The cylinder 121 is rotatably connected to the fixed frame 100; the connecting plate 1211 is installed on the top surface of the cylinder 121; both horizontal plates 123 are fixedly connected to the connecting plate 1211; two hinge plates 124 are respectively hinged to the two horizontal plates 123; two cameras 125 are respectively installed on the two hinge plates 124. The camera 125 is an industrial area array camera, and the lens axis forms an adjustable angle of 45°-90° with the surface of the waterproof membrane 200. The vertical distance between the camera lens and the surface of the membrane is 300-500mm.

[0043] The turntable 122 is fixedly sleeved on the cylinder 121. The outer circumferential surface of the turntable 122 is provided with anti-slip texture. By setting the turntable 122, it is easy to rotate the cylinder 121.

[0044] The surface defect detection device for waterproof membranes also includes a display controller 107, which is mounted on a mounting bracket 100 and electrically connected to two cameras 125.

[0045] Specifically, under normal conditions, the camera 125 near the cleaning unit 110 will operate, capturing images of the waterproof membrane 200 and transmitting the images to the display controller 107. The display controller 107 will then analyze whether the surface defects of the waterproof membrane 200 meet the set range. Furthermore, detecting surface defects of the waterproof membrane 200 using the camera 125 and display controller 107 is existing technology, and existing mature solutions can be employed.

[0046] When the camera 125 on the left needs maintenance or cleaning, rotating the cylinder 121 half a turn rotates the connecting plate 1211 and the horizontal plate 123, thereby moving the camera 125 on the right to the left. Maintenance or cleaning of one of the cameras 125 will not affect the detection time for surface defects on the waterproof membrane 200.

[0047] like Figures 5 to 7 As shown, the testing mechanism 120 also includes two first brackets 126, two second brackets 127, and two limiting plates 128. The two first brackets 126 are respectively installed on the bottom surface of the two horizontal plates 123; the two second brackets 127 are respectively installed on the bottom surface of the two hinge plates 124; the two limiting plates 128 are inserted into the first brackets 126 and the second brackets 127.

[0048] Specifically, when the camera 125 needs to be inspected or cleaned, the limiting plate 128 is moved toward the cylinder 121, so that the limiting plate 128 is separated from the second bracket 127 and the hinge plate 124, and the hinge plate 124 can rotate relative to the first bracket 126, thereby facilitating the cleaning or inspection of the camera 125 mounted on the hinge plate 124.

[0049] Working principle: In actual use, the waterproof membrane 200 to be tested is passed between the first conveyor roller 101, the second conveyor roller 102, the third conveyor roller 103 and the fourth conveyor roller 104. Then, by starting the motor 106, the power output shaft of the motor 106 drives the third conveyor roller 103 to rotate, which in turn drives the first conveyor roller 101, the second conveyor roller 102 and the fourth conveyor roller 104 to rotate, thereby moving the waterproof membrane 200 to be tested.

[0050] When the waterproof membrane 200 moves, it passes through the fixed box 111 and comes into contact with the surface of the cleaning roller 117. When the second conveyor roller 102 rotates, it drives the round rod 116 to rotate via the second transmission belt 119, which in turn drives the reciprocating screw 115 to rotate, which in turn drives the square column 114 to rotate. Since the cleaning roller 117 is fitted onto the square column 114, the cleaning roller 117 will also rotate synchronously when the square column 114 rotates. The rotating and reciprocating horizontally moving cleaning roller 117 cleans the waterproof membrane 200, and the debris that falls off after cleaning will fall into the fixed box 111. When the waterproof membrane 200 passes through the fixed box 111, the cleaning wipe 113 will also clean the waterproof membrane 200.

[0051] Then, by activating the camera 125 located near the cleaning unit 110, the camera 125 captures an image of the waterproof membrane 200 and transmits the image to the display controller 107, which analyzes whether the surface defects of the waterproof membrane 200 are within the set range.

[0052] When the camera 125 needs to be inspected or cleaned, the limiting plate 128 is moved toward the cylinder 121, so that the limiting plate 128 is separated from the second bracket 127 and the hinge plate 124, and the hinge plate 124 can rotate relative to the first bracket 126, thereby facilitating the cleaning or inspection of the camera 125 mounted on the hinge plate 124.

[0053] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0054] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A surface defect detection device for waterproof membranes, comprising a first conveying roller (101), a second conveying roller (102), a third conveying roller (103), and a fourth conveying roller (104) rotatably mounted on a fixed frame (100), characterized in that, Also includes: A drive mechanism is used to drive the first conveying roller (101), the second conveying roller (102), the third conveying roller (103), and the fourth conveying roller (104) to rotate simultaneously; The testing unit (120), installed on the fixing frame (100), is used to detect surface defects of the waterproof membrane (200); A cleaning unit (110) is used to pre-clean the surface of the waterproof membrane (200) before it enters the inspection station.

2. The surface defect detection device for waterproof membranes according to claim 1, characterized in that, The drive mechanism includes: Three first transmission belts (105) are used to connect the first conveyor roller (101), the second conveyor roller (102), the third conveyor roller (103) and the fourth conveyor roller (104) so ​​that the first conveyor roller (101), the second conveyor roller (102), the third conveyor roller (103) and the fourth conveyor roller (104) rotate synchronously; The motor (106) is mounted on the fixed frame (100), and its power output shaft is fixedly connected to the third conveying roller (103).

3. The surface defect detection device for waterproof membranes according to claim 1, characterized in that, The cleaning mechanism (110) includes: A fixed box (111) is installed on the fixed frame (100); A square column (114) has one end rotatably connected to the inner wall of the fixed box (111), and a reciprocating screw (115) is installed at the other end. The round rod (116) is fixedly connected to the reciprocating lead screw (115) and rotatably connected to the fixed box (111) and the fixed frame (100); A cleaning roller (117) is slidably sleeved on the square post (114); A second drive belt (119) is used to connect the round rod (116) and the second conveyor roller (102).

4. The surface defect detection device for waterproof membranes according to claim 3, characterized in that, The cleaning mechanism (110) also includes: The lead screw nut (118) is sleeved on the reciprocating lead screw (115) and is slidably connected to the fixed box (111); A rotating ring (1181) is rotatably sleeved on the lead screw nut (118); Multiple connecting rods (1182) are provided, one end of which is fixedly connected to a rotating ring (1181), and the other end of which is fixedly connected to a cleaning roller (117).

5. The surface defect detection device for waterproof membranes according to claim 3, characterized in that, The cleaning mechanism (110) also includes: The sealing plug (112) is inserted into the discharge groove opened at the bottom of the fixed box (111); A cleaning wipe (113) is installed on the top surface of the fixed box (111).

6. The surface defect detection device for waterproof membranes according to claim 1, characterized in that, The testing organization (120) includes: A cylinder (121) is rotatably connected to the fixed frame (100); A connecting plate (1211) is installed on the top surface of the cylinder (121); Both horizontal plates (123) are fixedly connected to the connecting plate (1211); Two hinged plates (124) are respectively hinged to the two horizontal plates (123); Two cameras (125) are mounted on the two hinge plates (124), respectively.

7. The surface defect detection device for waterproof membranes according to claim 6, characterized in that, The testing facility (120) also includes: Two first brackets (126) are respectively installed on the bottom surface of the two horizontal plates (123); Two second brackets (127) are respectively installed on the bottom surface of the two hinge plates (124); Two limiting plates (128) are inserted into the first bracket (126) and the second bracket (127).

8. The surface defect detection device for waterproof membranes according to claim 7, characterized in that, The testing facility (120) also includes: The turntable (122) is fixedly sleeved on the cylinder (121), and its outer circumferential surface is provided with anti-slip texture.

9. The surface defect detection device for waterproof membranes according to claim 7, characterized in that, Also includes: The display controller (107) is mounted on the bracket (100) and electrically connected to the two cameras (125).

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