New energy automobile lightweight fiber cloth defect detection device and method

Abstract

The invention relates to the technical field of textile fabric defect detection, in particular to a new energy automobile lightweight fiber fabric defect detection device and method. Comprising a base, two sets of unwinding frames are arranged on the base, an unwinding roller is rotationally connected between the two sets of unwinding frames, and a to-be-detected textile fabric is wound on the unwinding roller; the front side and the back side of the textile fabric are shot at the same time through the image collection mechanism, the image collection mechanism is driven by the two first electric push rods to be attached to the two limiting plates to horizontally move, and full-section scanning type image collection is conducted on the textile fabric located on the detection table; according to the textile fabric defect detection device, defect detection of the textile fabric is carried out in a manner of positioning conveying and simultaneous full-section image acquisition on the front and back surfaces, so that the detection efficiency is greatly improved, and the workload of workers is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of textile fabric defect detection, and particularly relates to a defect detection device and method for lightweight fiber fabrics of new energy vehicles. Background Art

[0002] With the global emphasis on environmental protection and sustainable development, the demand for lightweight fiber textile fabrics in fields such as aerospace, automobiles, and sports goods is increasing day by day. During the production process of lightweight fiber textile fabrics, defect detection operations need to be carried out on them. Traditional fabric defect detection devices can only detect defects on one side of the textile fabric at a time. When it is necessary to detect defects on the other side, operations such as rewinding, conveying, and detection need to be carried out again, resulting in cumbersome operations for double-sided detection of textile fabrics and greatly affecting the detection efficiency.

[0003] After retrieval, in the prior art, an authorized patent document with the authorization announcement number: CN216594832U and the announcement date: May 24, 2022 discloses a multi-angle fabric defect detection mechanism, belonging to the field of weaving. It includes a bottom plate, an installation part is arranged on the bottom plate, a support plate is arranged above the installation part, a rotating shaft is fixedly arranged on the lower surface of the support plate, and a mounting seat corresponding to the rotating shaft is arranged on the upper surface of the installation part. The rotating shaft is pivotally connected to the mounting seat. An expansion link is also arranged between the support plate and the installation part, and both ends of the expansion link are pivotally connected to the support plate and the installation part respectively; Fixed strips are also arranged on opposite sides of the lower surface of the support plate, the fixed strips are embedded in the receiving grooves, and the cross-section of the fixed strips is trapezoidal, and one end of the fixed strip is connected to the end of the receiving groove. The detection angle can be conveniently adjusted in this application.

[0004] However, this device still has the following defects: Although the detection angle can be conveniently adjusted, this device can only detect defects on one side of the woven fabric at a time. When it is necessary to detect defects on the other side, operations such as rewinding, conveying, and detection need to be carried out again, resulting in cumbersome operations for double-sided detection of the woven fabric and greatly affecting the detection efficiency. Summary of the Invention

[0005] In view of the above problems, the present invention provides a defect detection device and method for lightweight fiber fabrics of new energy vehicles, including a base, two unwinding frames are arranged on the base, a winding roller is rotatably connected between the two unwinding frames, and the textile fabric to be detected is wound around the winding roller; Two winding frames are arranged on the base, and a winding roller for winding and conveying the textile fabric is rotatably connected between the two winding frames; A detection table for positioning the textile fabric is arranged on the base, and the detection table is arranged between the winding roller and the winding roller; Two groups of limit plates are symmetrically installed on the detection table. Extension plates are fixedly connected to both groups of limit plates. First electric push rods are fixedly connected to both groups of extension plates. The output ends of the two first electric push rods are drivingly connected to an image acquisition mechanism for image acquisition and defect detection of textile fabrics. Two bidirectional lead screws are rotatably connected between the two groups of limit plates. A first fabric spreading mechanism and a second fabric spreading mechanism for tensioning, flattening and cleaning the textile fabric are both threadedly connected to the two bidirectional lead screws.

[0006] Furthermore, the image acquisition mechanism includes two sliders, which are respectively fixedly connected to the output ends of the two first electric push rods. Limit bolts are fixedly connected to the opposite side walls of the two sliders.

[0007] Furthermore, first brackets and second brackets are respectively fixedly connected to the upper and lower side walls of the two sliders. Cross beams are fixedly connected between the two first brackets and the two second brackets. Two second electric push rods are installed on both cross beams. The output ends of the two second electric push rods are both drivingly connected to linkage plates. Scanning cameras are installed on both linkage plates. The shooting ends of the two scanning cameras are respectively oriented towards the front and back sides of the textile fabric. Fill lights are arranged on both sides of the scanning cameras.

[0008] Furthermore, two arc-shaped material guiding plates are fixedly connected between the two groups of limit plates. The two arc-shaped material guiding plates are mirror-symmetrically distributed with the central axis of the limit plates as the center. Both arc-shaped material guiding plates are movably attached to the lower surface of the textile fabric. A positioning detection plate is fixedly connected between the two arc-shaped material guiding plates. A detection groove is formed on the positioning detection plate. Through the detection groove, the image acquisition mechanism can perform image acquisition on the lower surface of the textile fabric.

[0009] Furthermore, the structures and sizes of the first fabric spreading mechanism and the second fabric spreading mechanism are the same. The first fabric spreading mechanism and the second fabric spreading mechanism are symmetrically distributed with the central axis of the bidirectional lead screw as the center. Two limit shafts are fixedly connected between the two groups of limit plates.

[0010] Furthermore, a mounting frame is fixedly connected to one of the limit plates. A second motor is installed on the mounting frame. Two synchronous pulleys are rotatably connected to one of the limit plates. The center of one synchronous pulley is drivingly connected to the output end of the second motor. Synchronous belts are sleeved on both synchronous pulleys. The centers of the two synchronous pulleys are respectively drivingly connected to one end of the two bidirectional lead screws.

[0011] Furthermore, the first fabric spreading mechanism includes an internally threaded block and a linkage block. The internally threaded block is threadedly connected to one of the bidirectional lead screws. A through hole is formed on the linkage block. The through hole is movably attached to one of the limit shafts.

[0012] Further, vertical plates are fixedly connected to both the linkage block and the internal thread block. The tops of the two groups of vertical plates are fixedly connected with a cross plate, and a dust collection box is fixedly connected to the cross plate. A number of dust suction pipes are communicated with the bottom end of the dust collection box. The bottom ends of the number of dust suction pipes all penetrate through the cross plate and are fixedly connected with dust suction covers. A dust suction cavity is formed in the dust suction cover. The dust suction cavity is communicated with the number of dust suction pipes, and the air inlet end of the dust suction cavity faces the surface of the textile fabric.

[0013] Further, a spreading roller is fixedly connected between the internal thread block and the linkage block. An inflatable roller is sleeved on the spreading roller. After the inflatable roller is inflated, it fits with the surface of the textile fabric. A pressure sensor is installed inside the inflatable roller. An air charging pipe is communicated with the inflatable roller. An exhaust pipe is communicated with the air charging pipe. A pressure relief valve is arranged on the exhaust pipe. The air inlet end of the air charging pipe is communicated with a guiding elbow pipe. The air inlet end of the guiding elbow pipe is communicated with an air pump. The air inlet end of the air pump is communicated with an air suction pipe. The air inlet end of the air suction pipe penetrates through the cross plate and extends into the interior of the dust collection box. A filter screen is arranged at the air inlet end of the air suction pipe.

[0014] A detection method for a defect detection device of a lightweight fiber fabric for a new energy vehicle, the detection method comprising: Winding and sleeving the textile fabric on the unwinding roller, passing one end of the textile fabric through the detection table and then winding it onto the winding roller, and conveying a section of the textile fabric to be detected to the detection table; Starting the two groups of first spreading mechanisms and the two groups of second spreading mechanisms to perform soft clamping on the textile fabric while pulling the textile fabric to move in opposite directions, so as to tension and flatten the textile fabric and keep the surface of the textile fabric flat; Starting the two groups of first electric push rods to drive the image acquisition mechanism to horizontally move on the two groups of limit plates, and performing full-section scanning image acquisition on the textile fabric located on the detection table; After the image acquisition is completed, driving the image acquisition mechanism to reset by the two groups of first electric push rods, and the first spreading mechanism and the second spreading mechanism no longer clamp the textile fabric, so that the textile fabric continues to be conveyed.

[0015] The beneficial effects of the present invention are: 1. The device positions and conveys one end of the textile fabric to be detected to the detection table through the unwinding roller and the winding roller, simultaneously takes pictures of the front and back sides of the textile fabric through the image acquisition mechanism, drives the image acquisition mechanism to horizontally move on the two groups of limit plates by the two groups of first electric push rods, performs full-section scanning image acquisition on the textile fabric located on the detection table, and conveys the generated complete scanned image to the display for defect analysis. The device detects the defects of the textile fabric by positioning and conveying and performing full-section image acquisition on the front and back sides simultaneously, greatly improving the detection efficiency and reducing the workload of workers.

[0016] 2. Drive two sets of synchronous pulleys to rotate synchronously through the second motor, so that two sets of bidirectional lead screws rotate synchronously, thereby enabling the first and second material spreading mechanisms on one set of bidirectional lead screws to move in opposite directions simultaneously, spreading the textile fabric, keeping the surface of the textile fabric to be photographed flat, and improving the accuracy of fabric inspection.

[0017] 3. Make air enter the inflatable roller through the air pump, causing the inflatable roller to expand and squeeze the textile fabric. The inflatable rollers in the two first material spreading mechanisms are respectively attached to the upper and lower end faces of the textile fabric, squeezing the textile fabric simultaneously to achieve the effect of soft clamping of the textile fabric. Detect the air pressure in the inflatable roller through the air pressure sensor. When the air pressure in the inflatable roller is too high, open the pressure relief valve to allow the air to flow out through the exhaust pipe, so as to maintain a stable air pressure in the inflatable roller, thereby controlling the clamping force on the textile fabric. The two second material spreading mechanisms also use the same operation method to achieve soft clamping of the textile fabric. By controlling the soft clamping force on the textile fabric, it effectively avoids damaging the textile fabric by the traditional clamping method.

[0018] 4. Make the dust collection box form a negative pressure through the air pump, and make the suction hood form a negative pressure through the suction pipe connected to the dust collection box, so that the impurities or dust attached to the surface of the textile fabric enter the dust collection cavity and finally enter the dust collection box for centralized treatment. By cleaning the surface of the textile fabric, it effectively avoids the influence of the attachment of impurities and dust on the defect detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0020] Figure 1 Shows a schematic diagram of the main structure according to an embodiment of the present invention; Figure 2 Shows a schematic diagram of the structure of the image acquisition mechanism according to an embodiment of the present invention; Figure 3 Shows a schematic diagram of another angle of the main structure according to an embodiment of the present invention; Figure 4 Shows a schematic diagram of the structures of the first and second material spreading mechanisms according to an embodiment of the present invention; Figure 5 Shows a schematic diagram of another angle of the main structure according to an embodiment of the present invention; Figure 6Shows a schematic structural diagram of a first material spreading mechanism according to an embodiment of the present invention; Figure 7 Shows an exploded schematic structural diagram of a first material spreading mechanism according to an embodiment of the present invention; Figure 8 Shows according to an embodiment of the present invention Figure 7 The enlarged schematic diagram at position A in the figure.

[0021] In the figure: 1. Base; 2. Unwinding rack; 3. Unwinding roller; 4. Rewinding rack; 5. Rewinding roller; 6. First motor; 7. Detection table; 8. Limiting plate; 801. Limiting groove; 9. Extension plate; 10. First electric push rod; 11. Image acquisition mechanism; 1101. Slide block; 1102. Limiting bolt; 1103. First support; 1104. Second support; 1105. Cross beam; 1106. Second electric push rod; 1107. Linking plate; 1108. Scanning camera; 1109. Fill light; 12. Arc-shaped material guiding plate; 13. Positioning detection plate; 1301. Detection groove; 14. Bidirectional lead screw; 15. Limiting shaft; 16. First material spreading mechanism; 1601. Internal thread block; 1602. Linking block; 1603. Through hole; 1604. Vertical plate; 1605. Horizontal plate; 1606. Dust collection box; 1607. Suction pipe; 1608. Suction hood; 16081. Suction cavity; 1609. Material spreading roller; 1610. Inflatable roller; 1611. Inflation pipe; 1612. Air guiding elbow; 1613. Air pump; 1614. Suction pipe; 1615. Exhaust pipe; 17. Second material spreading mechanism; 18. Mounting rack; 19. Second motor; 20. Synchronous pulley; 21. Synchronous belt. Detailed implementation manners

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] The embodiments of the present invention provide a defect detection device for lightweight fiber fabrics of new energy vehicles, including a base 1; Exemplarily, as Figure 1 shown.

[0024] Two sets of unwinding racks 2 are arranged on the base 1. A winding roller 3 is rotatably connected between the two sets of unwinding racks 2. The textile fabric to be detected is wound on the winding roller 3. Two sets of winding racks 4 are arranged on the base 1. A winding roller 5 is rotatably connected between the two sets of winding racks 4. A first motor 6 is installed on one set of winding racks 4. The output end of the first motor 6 is drivingly connected to one end of the winding roller 5. A detection table 7 is arranged on the base 1. The detection table 7 is arranged between the unwinding roller 3 and the winding roller 5; Specifically, the textile fabric roll is sleeved on the unwinding roller 3. One end of the textile fabric is wound around the winding roller 5 after passing through the detection table 7. The first motor 6 drives the winding roller 5 to rotate to realize the conveying of the textile fabric. The intermittent conveying of the textile fabric is realized by controlling the opening and closing time of the first motor 6.

[0025] Two sets of limiting plates 8 are symmetrically installed on the detection table 7. Limiting grooves 801 are opened on both sets of limiting plates 8. Extension plates 9 are fixedly connected to both sets of limiting plates 8. First electric push rods 10 are fixedly connected to both sets of extension plates 9. The output ends of the two first electric push rods 10 are drivingly connected to an image acquisition mechanism 11. A control component is also arranged on the detection table 7. The control component includes a single-chip microcomputer, a display screen and an alarm lamp; Specifically, a section of the textile fabric to be detected is conveyed onto the detection table 7. The surface of the textile fabric is photographed by the image acquisition mechanism 11. The two first electric push rods 10 drive the image acquisition mechanism 11 to move horizontally and fit on the two limiting plates 8 to perform full-section scanning image acquisition on the textile fabric located on the detection table 7, and a complete scanned image is generated and sent to the display for defect analysis. When a fabric defect is detected, the scanned image corresponding to this section of the fabric is marked to facilitate the staff to search for and locate the defective textile fabric section, and at the same time, the staff is reminded by the alarm lamp. After the image acquisition is completed, the two first electric push rods 10 drive the image acquisition mechanism 11 to reset.

[0026] The image acquisition mechanism 11 includes two sliders 1101. Exemplarily, as Figure 2 shown.

[0027] The two sliders 1101 are respectively fixedly connected to the output ends of the two first electric push rods 10. Limiting bolts 1102 are fixedly connected to the opposite side walls of the two sliders 1101. The two limiting bolts 1102 are respectively movably fitted with the two limiting grooves 801; On the upper and lower side walls of the two groups of sliders 1101, a first bracket 1103 and a second bracket 1104 are respectively fixedly connected. Between the two groups of first brackets 1103 and the two groups of second brackets 1104, cross beams 1105 are fixedly connected. On the two groups of cross beams 1105, two groups of second electric push rods 1106 are installed. The output ends of the two groups of second electric push rods 1106 are respectively drivingly connected with linkage plates 1107. On the two groups of linkage plates 1107, scanning cameras 1108 are installed. The shooting ends of the two groups of scanning cameras 1108 respectively face the front and back sides of the textile fabric. On both sides of the scanning camera 1108, fill light lamps 1109 are arranged; Specifically, by arranging two groups of scanning cameras 1108, the image acquisition mechanism 11 can simultaneously perform image acquisition operations on the front and back sides of the textile fabric. The second electric push rod 1106 can drive the linkage plate 1107 to move up and down, so as to adjust the distance between the scanning camera 1108 and the surface of the textile fabric according to the shooting needs, so that the captured image meets the requirements. By arranging the fill light lamps 1109, the clarity of the captured image is effectively improved.

[0028] Exemplarily, such as Figures 3 - 5 shown.

[0029] Between the two groups of limiting plates 8, two groups of arc-shaped material guiding plates 12 are fixedly connected. The two groups of arc-shaped material guiding plates 12 are mirror-symmetrically distributed with the central axis of the limiting plate 8 as the center. The two groups of arc-shaped material guiding plates 12 are both movably attached to the lower surface of the textile fabric. Between the two groups of arc-shaped material guiding plates 12, a positioning detection plate 13 is fixedly connected. On the positioning detection plate 13, a detection groove 1301 is opened. Through the detection groove 1301, the scanning camera 1108 located at the bottom end of the positioning detection plate 13 can perform image acquisition on the lower surface of the textile fabric; Specifically, by making the textile fabric fit on the two groups of arc-shaped material guiding plates 12 for conveying, when the conveying angle of the textile fabric changes during the conveying process, it is always in contact with the arc-shaped surface of the arc-shaped material guiding plate 12, avoiding damage or wrinkles of the textile fabric caused by contact with sharp edges and corners during the conveying process of the textile fabric. By arranging the positioning detection plate 13 and the detection groove 1301, the image acquisition mechanism 11 can simultaneously perform image acquisition on the upper and lower surfaces of the textile fabric.

[0030] Between the two groups of limiting plates 8, two groups of bidirectional lead screws 14 are rotatably connected. The two groups of bidirectional lead screws 14 are respectively arranged at the upper and lower ends of the positioning detection plate 13. On the two groups of bidirectional lead screws 14, a first material spreading mechanism 16 and a second material spreading mechanism 17 are threadedly connected. The structures and sizes of the first material spreading mechanism 16 and the second material spreading mechanism 17 are the same. The first material spreading mechanism 16 and the second material spreading mechanism 17 are symmetrically distributed with the central axis of the bidirectional lead screw 14 as the center. Between the two groups of limiting plates 8, two groups of limiting shafts 15 are fixedly connected; A mounting frame 18 is fixedly connected to a set of the limiting plates 8, a second motor 19 is mounted on the mounting frame 18, two sets of synchronous pulleys 20 are rotatably connected to a set of the limiting plates 8, the center of one set of the synchronous pulleys 20 is in transmission connection with the output end of the second motor 19, synchronous belts 21 are sleeved on both sets of the synchronous pulleys 20, and the centers of the two sets of the synchronous pulleys 20 are respectively in transmission connection with one ends of two sets of bidirectional lead screws 14; Specifically, the second motor 19 drives the two sets of synchronous pulleys 20 to rotate synchronously, so that the two sets of bidirectional lead screws 14 rotate synchronously, thereby enabling the first material spreading mechanism 16 and the second material spreading mechanism 17 on one set of the bidirectional lead screws 14 to move in opposite directions simultaneously, spreading the textile fabric, keeping the surface of the textile fabric to be photographed flat and clean, and improving the accuracy of defect detection.

[0031] The first material spreading mechanism 16 includes an internally threaded block 1601 and a linkage block 1602; Exemplarily, as Figures 6 - 8 shown.

[0032] The internally threaded block 1601 is in threaded connection with one set of the bidirectional lead screws 14, a through hole 1603 is formed in the linkage block 1602, the through hole 1603 is in movable fit with one set of limiting shafts 15, vertical plates 1604 are fixedly connected to both the linkage block 1602 and the internally threaded block 1601, a horizontal plate 1605 is fixedly connected to the tops of the two vertical plates 1604, a dust collection box 1606 is fixedly connected to the horizontal plate 1605, a plurality of suction pipes 1607 are communicated with the bottom end of the dust collection box 1606, the bottom ends of the plurality of suction pipes 1607 all penetrate through the horizontal plate 1605 and are fixedly connected with suction hoods 1608, a suction cavity 16081 is formed in the suction hood 1608, the suction cavity 16081 is communicated with the plurality of suction pipes 1607, and the air inlet end of the suction cavity 16081 faces the surface of the textile fabric; A material spreading roller 1609 is fixedly connected between the internally threaded block 1601 and the linkage block 1602, an inflatable roller 1610 is sleeved on the material spreading roller 1609, the inflatable roller 1610 is in mutual fit with the surface of the textile fabric after being inflated, a pressure sensor is installed inside the inflatable roller 1610, an inflation pipe 1611 is communicated with the inflatable roller 1610, an exhaust pipe 1615 is communicated with the inflation pipe 1611, a pressure relief valve is arranged on the exhaust pipe 1615, the air inlet end of the inflation pipe 1611 is communicated with a guide air elbow 1612, the air inlet end of the guide air elbow 1612 is communicated with an air pump 1613, the air inlet end of the air pump 1613 is communicated with a suction pipe 1614, the air inlet end of the suction pipe 1614 penetrates through the horizontal plate 1605 and extends into the dust collection box 1606, and a filter screen is arranged at the air inlet end of the suction pipe 1614; Specifically, the air pump 1613 is used to make air enter the inflation roller 1610, causing the inflation roller 1610 to expand and squeeze the textile fabric. The inflation rollers 1610 in the two groups of first fabric spreading mechanisms 16 are respectively attached to the upper and lower end faces of the textile fabric, squeezing the textile fabric simultaneously to achieve the effect of soft clamping of the textile fabric. The air pressure sensor is used to detect the air pressure in the inflation roller 1610. When the air pressure in the inflation roller 1610 is too high, the air is allowed to flow out through the exhaust pipe 1615 by opening the pressure relief valve, so as to maintain a stable air pressure in the inflation roller 1610, thereby controlling the clamping force on the textile fabric. The two groups of second fabric spreading mechanisms 17 also use the same operation method to achieve soft clamping of the textile fabric. Thus, when the two groups of first fabric spreading mechanisms 16 and the second fabric spreading mechanisms 17 move in opposite directions respectively, the textile fabric can be tensioned and laid flat, avoiding the influence of textile fabric wrinkles on defect detection; Furthermore, the air pump 1613 is used to create a negative pressure in the dust collection box 1606, and the suction pipe 1607 connected to the dust collection box 1606 is used to create a negative pressure in the suction hood 1608, so that the impurities or dust attached to the surface of the textile fabric enter the dust collection cavity 16081 and finally enter the dust collection box 1606 for centralized treatment.

[0033] The working principle of a new energy vehicle lightweight fiber fabric defect detection device proposed by the present invention is as follows: The textile fabric roll is sleeved on the unwinding roller 3, one end of the textile fabric passes through the detection table 7 and then is wound around the winding roller 5. The first motor 6 drives the winding roller 5 to rotate to realize the conveying of the textile fabric, and the intermittent conveying of the textile fabric is realized by controlling the opening and closing time of the first motor 6.

[0034] A section of the textile fabric to be detected is conveyed to the detection table 7. The surface of the textile fabric is photographed by the image acquisition mechanism 11. The two groups of first electric push rods 10 drive the image acquisition mechanism 11 to move horizontally and fit on the two groups of limit plates 8, and full-section scanning image acquisition of the textile fabric located on the detection table 7 is carried out. The generated complete scan image is sent to the display for defect analysis. When a fabric defect is detected, the corresponding scan image of this section of the fabric is marked to facilitate the staff to search for and locate the defective textile fabric section, and at the same time, the staff is reminded by the alarm lamp. After the image acquisition is completed, the two groups of first electric push rods 10 drive the image acquisition mechanism 11 to reset.

[0035] By setting two groups of scanning cameras 1108, the image acquisition mechanism 11 can simultaneously perform image acquisition operations on the front and back sides of the textile fabric. The second electric push rod 1106 can drive the linkage plate 1107 to move up and down, so as to adjust the distance between the scanning camera 1108 and the surface of the textile fabric according to the shooting requirements, making the captured image meet the requirements. By setting the fill light 1109, the clarity of the captured image is effectively improved.

[0036] By making the textile fabric fit on two groups of arc-shaped guide plates 12 for conveying, when the conveying angle of the textile fabric changes during the conveying process, it can be made to fit the arc surface of the arc-shaped guide plate 12, avoiding damage or wrinkles of the textile fabric caused by contact with sharp edges during the conveying process of the textile fabric. By setting the positioning detection plate 13 and the detection groove 1301, the image acquisition mechanism 11 can simultaneously perform image acquisition on the upper and lower surfaces of the textile fabric.

[0037] The second motor 19 drives two groups of synchronous wheels 20 to rotate synchronously, so that two groups of bidirectional lead screws 14 rotate synchronously. As a result, the first spreading mechanism 16 and the second spreading mechanism 17 on one group of bidirectional lead screws 14 move in opposite directions at the same time, spreading the textile fabric, making the surface of the textile fabric to be photographed flat and clean, and improving the accuracy of defect detection.

[0038] The air pump 1613 allows air to enter the inflation roller 1610, causing the inflation roller 1610 to expand and squeeze the textile fabric. The inflation rollers 1610 in the two groups of first spreading mechanisms 16 are respectively attached to the upper and lower end faces of the textile fabric, squeezing the textile fabric at the same time, achieving the effect of soft clamping of the textile fabric. The air pressure in the inflation roller 1610 is detected by the air pressure sensor. When the air pressure in the inflation roller 1610 is too high, the air is allowed to flow out through the exhaust pipe 1615 by opening the pressure relief valve, so as to maintain a stable air pressure in the inflation roller 1610, thereby controlling the clamping force on the textile fabric. The two groups of second spreading mechanisms 17 also use the same operation method to achieve soft clamping of the textile fabric. Thus, when the two groups of first spreading mechanisms 16 and the second spreading mechanisms 17 move in opposite directions respectively, the textile fabric can be tensioned and laid flat, avoiding the influence of textile fabric wrinkles on defect detection.

[0039] The air pump 1613 creates a negative pressure in the dust collection box 1606, and the suction pipe 1607 connected to the dust collection box 1606 creates a negative pressure in the suction hood 1608, so that the impurities or dust attached to the surface of the textile fabric enter the suction cavity 16081 and finally enter the dust collection box 1606 for centralized treatment.

[0040] On the basis of the above-mentioned new energy vehicle lightweight fiber fabric defect detection device, the embodiment of the present invention also proposes a detection method for this defect detection device. Exemplarily, the detection method includes: Set the textile fabric roll on the unwinding roller, pass one end of the textile fabric through the inspection table and then wind it around the winding roller. Turn on the first motor to drive the winding roller to rotate, convey a section of the textile fabric to be inspected to the inspection table, and then turn off the first motor; Turn on the second motor to drive the two synchronous pulleys to rotate synchronously, so that the two bidirectional lead screws rotate synchronously. Thus, the first spreading mechanism and the second spreading mechanism on the same bidirectional lead screw move towards each other simultaneously to approach the center of the textile fabric, and then turn off the second motor; Turn on the air pump to make air enter the inflatable roller, causing the inflatable roller to expand and squeeze the textile fabric. The inflatable rollers in the two first spreading mechanisms are respectively attached to the upper and lower end faces of the textile fabric, squeezing the textile fabric simultaneously to achieve the effect of soft clamping of the textile fabric; The pressure sensor set inside the inflatable roller detects the air pressure inside the inflatable roller. When the air pressure inside the inflatable roller is too high, open the pressure relief valve to make the air flow out through the exhaust pipe, so as to maintain a stable air pressure inside the inflatable roller, thereby controlling the clamping force on the textile fabric; The two second spreading mechanisms also use the same operation method to achieve soft clamping of the textile fabric; Turn on the second motor to drive the two synchronous pulleys to rotate in opposite directions synchronously, so that the two bidirectional lead screws rotate in opposite directions synchronously. Thus, while the two first spreading mechanisms and the two second spreading mechanisms on the two bidirectional lead screws softly clamp the textile fabric, they pull the textile fabric in opposite directions to move, tension and flatten the textile fabric, and keep the surface of the textile fabric flat; While the air outlet end of the air pump inflates the inflatable roller, the air inlet end of the air pump extracts the air in the dust collection box, creating a negative pressure inside the dust collection box. Through the dust suction pipe connected to the dust collection box, a negative pressure is created inside the dust suction hood, so that the impurities or dust attached to the surface of the textile fabric enter the dust suction cavity and finally enter the dust collection box, keeping the surface of the textile fabric clean; Turn on the two first electric push rods to drive the image acquisition mechanism to move horizontally and attach to the two limit plates, and the scanning camera performs full-section scanning image acquisition on the textile fabric located on the inspection table; Transmit the generated scanned image to the display for defect analysis. When a fabric defect is detected, mark the scanned image corresponding to this section of the fabric to facilitate the staff to search for and locate the defective textile fabric section, and at the same time, remind the staff through the alarm lamp; After the image acquisition is completed, drive the image acquisition mechanism to reset through the two first electric push rods. Turn off the air pump to make the inflatable rollers in the first spreading mechanism and the second spreading mechanism deflate and contract, no longer clamp the textile fabric, and let the textile fabric continue to be conveyed.

[0041] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A defect detection device for lightweight fiber cloth of new energy vehicles, comprising a base, characterized in that: Two groups of unwinding frames are arranged on the base, and an unwinding roller is rotatably connected between the two groups of unwinding frames, and the textile fabric to be detected is wound on the unwinding roller; Two groups of winding frames are arranged on the base, and winding rollers for winding and conveying textile fabrics are rotatably connected between the two groups of winding frames; The base is provided with a detection platform for positioning the textile fabric, and the detection platform is arranged between the unwinding roller and the winding roller; Two groups of limit plates are symmetrically installed on the detection platform, and the two groups of limit plates are fixedly connected to extension plates, and the two groups of extension plates are fixedly connected to first electric push rods, and the output ends of the two groups of first electric push rods are transmission-connected to image acquisition mechanisms for image acquisition and defect detection of textile fabrics; Two groups of bidirectional screw rods are rotatably connected between the two groups of limit plates, and the two groups of bidirectional screw rods are both threadedly connected with a first material spreading mechanism and a second material spreading mechanism for tensioning, flattening and cleaning textile fabrics.

2. The defect detection device for lightweight fiber cloth for new energy vehicles according to claim 1 is characterized in that: The image acquisition mechanism comprises two groups of sliders, the two groups of sliders are respectively fixedly connected to the output ends of the two groups of first electric push rods, and the opposite side walls of the two groups of sliders are fixedly connected to limit bolts.

3. The defect detection device for lightweight fiber cloth for new energy vehicles according to claim 2 is characterized in that: The upper and lower side walls of the two groups of sliders are respectively fixedly connected with the first bracket and the second bracket, and the two groups of the first brackets are fixedly connected with the two groups of the second brackets. Two groups of second electric push rods are installed on the two groups of the crossbeams, and the output ends of the two groups of the second electric push rods are transmission-connected with linkage plates, and scanning cameras are installed on the two groups of linkage plates. The shooting ends of the two groups of scanning cameras are respectively facing the front and back sides of the textile fabric, and fill lights are arranged on both sides of the scanning cameras.

4. The defect detection device for lightweight fiber cloth for new energy vehicles according to claim 1 is characterized in that: Two groups of arc-shaped material guide plates are fixedly connected between the two groups of the limit plates, and the two groups of arc-shaped material guide plates are distributed in a mirror image with the central axis of the limit plate as the center. The two groups of arc-shaped material guide plates are movably fitted with the lower surface of the textile fabric. A positioning detection plate is fixedly connected between the two groups of the arc-shaped material guide plates, and a detection slot is provided on the positioning detection plate. Through the detection slot, the image acquisition mechanism can capture the image of the lower surface of the textile fabric.

5. The defect detection device for lightweight fiber cloth for new energy vehicles according to claim 1 is characterized in that: The first material spreading mechanism and the second material spreading mechanism have the same structure and size. The first material spreading mechanism and the second material spreading mechanism are symmetrically distributed with the central axis of the bidirectional screw as the center. Two groups of limiting shafts are fixedly connected between the two groups of limiting plates.

6. The defect detection device for lightweight fiber cloth for new energy vehicles according to claim 5 is characterized in that: A mounting frame is fixedly connected to one group of the limit plates, a second motor is installed on the mounting frame, two groups of synchronous wheels are rotatably connected to one group of the limit plates, the center of one group of the synchronous wheels is transmission connected to the output end of the second motor, both groups of the synchronous wheels are sleeved with synchronous belts, and the centers of the two groups of the synchronous wheels are transmission connected to one end of two groups of bidirectional screw rods respectively.

7. The defect detection device for lightweight fiber cloth for new energy vehicles according to claim 5 is characterized in that: The first material spreading mechanism comprises an internal thread block and a linkage block, wherein the internal thread block is threadedly connected with a group of bidirectional screw rods, and a through hole is provided on the linkage block, and the through hole is movably fitted with a group of limit shafts.

8. The defect detection device for lightweight fiber cloth for new energy vehicles according to claim 7 is characterized in that: The linkage block and the internal thread block are both fixedly connected with vertical plates, the top ends of the two groups of vertical plates are fixedly connected with horizontal plates, the horizontal plates are fixedly connected with a dust collecting box, the bottom end of the dust collecting box is connected with several groups of dust suction pipes, the bottom ends of the several groups of dust suction pipes are all fixedly connected with a dust suction hood after passing through the horizontal plates, a dust suction cavity is opened in the dust suction hood, the dust suction cavity is connected with several groups of dust suction pipes, and the air inlet end of the dust suction cavity faces the surface of the textile fabric.

9. The defect detection device for lightweight fiber cloth for new energy vehicles according to claim 8 is characterized in that: A material spreading roller is fixedly connected between the internal thread block and the linkage block, and an inflation roller is sleeved on the material spreading roller. After the inflation roller is inflated, it fits with the surface of the textile fabric, and an air pressure sensor is installed inside the inflation roller. The inflation roller is connected with an inflation pipe, and the inflation pipe is connected with an exhaust pipe, and a pressure relief valve is provided on the exhaust pipe. The air inlet end of the inflation pipe is connected with an air guide elbow, and the air inlet end of the air guide elbow is connected with an air pump, and the air inlet end of the air pump is connected with an intake pipe, and the air inlet end of the intake pipe extends to the interior of the dust collecting box after passing through the horizontal plate, and a filter is provided at the air inlet end of the intake pipe.

10. A detection method applied to the defect detection device for lightweight fiber cloth for new energy vehicles according to any one of claims 1 to 9, characterized in that: The detection method comprises: The textile fabric roll is placed on the unwinding roller, one end of the textile fabric is wound onto the winding roller after passing through the testing table, and the section of the textile fabric to be tested is conveyed to the testing table; The two sets of first material spreading mechanisms and the two sets of second material spreading mechanisms are turned on to softly clamp the textile fabric and pull the textile fabric to move in opposite directions, thereby tensioning and flattening the textile fabric to keep the surface of the textile fabric flat; The two sets of first electric push rods are turned on to drive the image acquisition mechanism to move horizontally on the two sets of limit plates, so as to perform full-segment scanning image acquisition on the textile fabric on the testing table; After the image acquisition is completed, the image acquisition mechanism is driven to reset by the two groups of first electric push rods, and the first material spreading mechanism and the second material spreading mechanism no longer clamp the textile fabric, so that the textile fabric continues to be conveyed.

Images