Sofa fabric surface quality detection device

Abstract

The invention discloses a sofa fabric surface quality detection device, and relates to the field of fabric detection, the sofa fabric surface quality detection device comprises a bottom frame main body, the top end of the bottom frame main body is provided with a limiting frame, the limiting frame is internally and uniformly provided with four connecting clamping rods for fixing a fabric, and the limiting frame is internally provided with a hydraulic telescopic rod and a test lamp panel; the hydraulic telescopic rod drives the four connecting clamping rods to straighten a fixed fabric in a starting state, then the testing lamp panel is attached to the surface of the straightened fabric with preset pressure and rotates around the center axis of the fabric, light irradiation detection is carried out, and a mapping plate used as a light-transmitting bearing face is arranged at the left end of the bottom frame main body. Fine or hidden gap flaws on the surface of the fabric are amplified, then a wrinkle shadow blind area caused by a traditional fixed light source is thoroughly eliminated, the fabric detection accuracy is improved, the product yield is guaranteed, flaws are accurately positioned on the surface of the fabric, and a detection result with a positioning mark is automatically generated.

Description

Technical Field

[0001] The invention relates to the technical field of fabric detection, in particular to a surface quality detection device for sofa fabrics. Background Art

[0002] With the improvement of people's living standards and the expansion of the home consumption market, sofas, as one of the important furniture, have attracted more and more attention to their quality. Consumers not only pay attention to the appearance and design of sofas, but also attach more importance to the quality of materials. The surface quality testing of sofa fabrics not only involves basic physical properties such as wear resistance and stain resistance, but also needs to consider other quality indicators such as light transmittance to ensure the safety and reliability of the product during use. It is particularly important to develop specialized testing equipment to meet the quality requirements of different fabric types. However, when testing the light transmittance of fabrics, existing sofa fabric testing equipment often only uses direct light to test the fabrics in their normal state. Small defects are difficult to detect intuitively and the coordinates of the defects cannot be accurately located. Manual adjustment of the fabric position and multiple tests are required. This is especially difficult to identify when there are wrinkles on the fabric surface. Sofa fabrics themselves often have a certain degree of elasticity, and the fabrics are in a compressed and deformed state during actual use. If this part of the test is ignored, small defects will continue to expand with the continued use of the fabric, thereby affecting the overall service life of the fabric. Summary of the Invention

[0003] (1) Technical problems solved In view of the above-mentioned shortcomings of the prior art, the present invention provides a sofa fabric surface quality detection device, which can effectively solve the problems of the prior art.

[0004] (2) Technical solution To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention discloses a surface quality detection device for sofa fabrics, comprising a base frame body, a limit frame being provided at the top end of the base frame body, four connecting clamping rods for fixing the fabric being evenly provided inside the limit frame, a hydraulic telescopic rod and a test light board being provided inside the limit frame, the hydraulic telescopic rod driving the four connecting clamping rods to straighten the fixed fabric when in a started state, and then causing the test light board to adhere to the stretched fabric surface with a predetermined pressure and rotate around its central axis, and perform light irradiation detection, a mapping plate being provided at the left end of the base frame body for serving as a light-transmitting bearing surface, an image collector being provided at the top end of the limit frame for recording the light transmittance state of the mapping plate surface, a sensor collector being provided at the top end of the test light board, the sensor collector being used to detect the light intensity signal of each position point passing through the fabric in real time, and evaluate and output the light transmittance uniformity and defect data of the fabric in combination with the light transmittance state recorded by the image collector.

[0005] Furthermore, a fixing frame is provided on the surface of the hydraulic telescopic rod, the right end of the fixing frame is fixedly connected to the top of the base frame body, the outer rod of the hydraulic telescopic rod is fixedly connected to the top of the base frame body, and a lead screw is fixedly connected to the output rod of the hydraulic telescopic rod. A sleeve is provided on the surface of the lead screw, the left end of the sleeve is fixedly connected to the top of the test light board, and the surface of the sleeve is rotatably connected to the left end of the fixing frame.

[0006] Furthermore, the right end of the sleeve is rotatably connected to a ball, and the ball is slidably connected to the surface of the screw.

[0007] Furthermore, one end of the connecting clamp rod is slidably connected to the surface of the limit frame, the surface of the connecting clamp rod is evenly fixedly connected with a transmission gear block, one side of the connecting clamp rod is provided with a fan gear, the fan gear is meshed with the transmission gear block, the surface of the fan gear is rotatably connected to the support frame, one end of the support frame is fixedly connected to the surface of the limit frame, one end of the fan gear is rotatably connected to the connecting rod, one end of the connecting rod is rotatably connected to the connecting rod, and one end of the connecting rod is fixedly connected to one end of the lead screw.

[0008] Furthermore, the surface of the connecting clamp rod is connected to a spiral rod through threaded rotation, the interior of the connecting clamp rod is slidably connected to a fixed clamp plate, and one end of the spiral rod is fixedly connected to the surface of the fixed clamp plate.

[0009] Furthermore, the test light board is an LED light board, and the light-emitting surface of the test light board is evenly distributed on the side in contact with the fixed fabric.

[0010] Furthermore, the telescopic action of the hydraulic telescopic rod includes two stages: in the first stage, the four connecting clamping rods are driven to move outward to a preset tension position to straighten the fabric; in the second stage, while the fabric continues to be straightened, the test light board is triggered and cooperated to perform a rotation detection action.

[0011] Furthermore, the bottom end of the image collector is fixedly connected to the surface of the chassis body, and the image collector lens is set toward the mapping board. The image collector will capture the light-transmitting image projected on the mapping board through the fabric and submit it to the sensor collector.

[0012] Furthermore, the sensor collector is installed at the left end of the fixing frame, and the working logic of the sensor collector includes the following steps: Step 1: Collect the light intensity data of the fabric surface, receive the light transmission image data recorded by the image collector, and perform preprocessing; Step 2: Correlating the light intensity data with corresponding position points in the light transmission image data; Step 3: Based on the associated location point data, obtain the average value and standard deviation of the overall light transmittance of the fabric; Step 4: Divide the fabric into several grid areas and calculate the local variance of the light transmittance in each grid area; Step 5: Set a uniformity assessment threshold. When the standard deviation exceeds the first threshold, or there is a grid area with a local variance exceeding the second threshold, the fabric light transmittance uniformity is determined to be unqualified. The area below the overall average value (the third threshold) is marked as a low light transmittance defect area, and the area above the overall average value (the fourth threshold) is marked as a high light transmittance defect area. Step 6: Map the position coordinates of the defect area to the light transmission image collected by the image collector to generate a fabric detection map with defect location marks.

[0013] Furthermore, the bottom end of the mapping plate is rotatably connected to the top end of the base frame body, and the left and right sides of the bottom end of the mapping plate are rotatably connected to support plates.

[0014] (3) Beneficial effects Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: By setting up a hydraulic telescopic rod and a test light board, the fabric is fixed and actively stretched, so that during the inspection process, the compressed state of the fabric is simulated. During the stretching process of the simulated state, a 360° dynamic scan is performed synchronously, so that the light-transmitting state is projected onto the surface of the mapping board, thereby amplifying small or hidden gap defects on the fabric surface, and completely eliminating the wrinkle shadow blind spots caused by traditional fixed light sources, thereby improving the accuracy of fabric inspection and ensuring the product yield.

[0015] By using sensor data from sensor collectors, standard deviation calculation, gridded local variance analysis, and multi-level threshold judgment, the light transmittance uniformity assessment is converted into an objective quantitative indicator, solving the problem of insufficient sensitivity of manual visual inspection to gradual defects and reducing the misjudgment rate.

[0016] By utilizing the spatial coordinate mapping mechanism of light transmission images and light intensity data, combined with the classification marking of high and low light transmission abnormal areas and the generation of detection maps, it is possible to not only identify the existence of defects, but also accurately locate defects on the fabric surface and automatically generate detection results with positioning marks, thereby guiding subsequent repair processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the overall three-dimensional structure of the present invention from another angle; Figure 3 Schematic diagram of the three-dimensional structure of the limiting frame, fixing frame, image collector and hydraulic telescopic rod in the present invention; Figure 4 Schematic diagram of the three-dimensional structure of the hydraulic telescopic rod, lead screw, connecting clamp rod and spiral rod in the present invention; Figure 5 Schematic diagram of the three-dimensional structure of the limiting frame in the present invention; Figure 6 Schematic diagram of the three-dimensional structure of the fixing frame, hydraulic telescopic rod, lead screw and test light board in the present invention; Figure 7 For the present invention Figure 6 Schematic diagram of the local enlarged structure at A in the middle; Figure 8 It is a schematic diagram of the three-dimensional structure of the connecting clamp rod, sector gear, transmission gear block and fixed clamp plate in the present invention.

[0019] The numbers in the figure represent, respectively, 1. chassis body; 2. limit frame; 3. mapping plate; 4. fixing frame; 5. hydraulic telescopic rod; 6. lead screw; 7. sleeve; 8. test light board; 9. ball bearing; 10. connecting clamp rod; 11. transmission gear block; 12. sector gear; 13. connecting rod; 14. connecting rod; 15. support frame; 16. screw rod; 17. fixing clamp plate; 18. image collector; 19. support plate; 20. sensor collector. DETAILED DESCRIPTION

[0020] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] The present invention will be further described below with reference to the embodiments.

[0022] Example A sofa fabric surface quality detection device of this embodiment is as follows Figures 1-8As shown, it includes a base frame body 1, a limit frame 2 is provided at the top of the base frame body 1, four connecting clamping rods 10 for fixing the fabric are evenly provided inside the limit frame 2, and a hydraulic telescopic rod 5 and a test light board 8 are provided inside the limit frame 2. When the hydraulic telescopic rod 5 is in the started state, it drives the four connecting clamping rods 10 to straighten the fixed fabric, and then makes the test light board 8 fit the surface of the stretched fabric with a predetermined pressure and rotate around its central axis, and performs light irradiation detection. The test light board 8 is an LED light board, and the luminous surface of the test light board 8 is evenly distributed on the side in contact with the fixed fabric. The telescopic action of the hydraulic telescopic rod 5 includes two stages: in the first stage, the four connecting clamping rods 10 are driven to move outward to the preset tension position to straighten the fabric; in the second stage, while the fabric continues to be stretched, the test light board 8 is triggered and cooperated with to perform the rotation detection action; like Figure 6 As shown, the surface of the hydraulic telescopic rod 5 is sleeved with a fixing frame 4, the right end of the fixing frame 4 is fixedly connected to the top of the chassis body 1, the outer rod of the hydraulic telescopic rod 5 is fixedly connected to the top of the chassis body 1, and the output rod of the hydraulic telescopic rod 5 is fixedly connected to a screw 6. The surface of the screw 6 is sleeved with a sleeve 7, the left end of the sleeve 7 is fixedly connected to the top of the test light board 8, the surface of the sleeve 7 is rotatably connected to the left end of the fixing frame 4, and the right end of the sleeve 7 is rotatably connected to a ball 9, which is slidably connected to the surface of the screw 6; like Figure 8 As shown, one end of the connecting clamping rod 10 is slidably connected to the surface of the limit frame 2, and the surface of the connecting clamping rod 10 is evenly fixedly connected with a transmission gear block 11, and a fan gear 12 is provided on one side of the connecting clamping rod 10, which is meshed with the transmission gear block 11, and the surface of the fan gear 12 is rotatably connected to a support frame 15, one end of the support frame 15 is fixedly connected to the surface of the limit frame 2, one end of the fan gear 12 is rotatably connected to a connecting rod 13, and one end of the connecting rod 13 is rotatably connected to a connecting rod 14, one end of the connecting rod 14 is fixedly connected to one end of the lead screw 6, and the surface of the connecting clamping rod 10 is rotatably connected to a spiral rod 16 through a thread, and the interior of the connecting clamping rod 10 is slidably connected to a fixed splint 17, and one end of the spiral rod 16 is fixedly connected to the surface of the fixed splint 17; like Figure 2As shown, a mapping plate 3 serving as a light-transmitting bearing surface is provided at the left end of the chassis body 1. The bottom end of the mapping plate 3 is rotatably connected to the top end of the chassis body 1. Support plates 19 are rotatably connected to the left and right sides of the bottom end of the mapping plate 3. An image collector 18 for recording the light transmittance state of the surface of the mapping plate 3 is provided at the top end of the limit frame 2. A sensor collector 20 is provided at the top end of the test light board 8. The sensor collector 20 is installed at the left end of the fixed frame 4. The sensor collector 20 is used to detect the light intensity signal of each position point through the fabric in real time, and evaluate and output the light transmittance uniformity and defect data of the fabric in combination with the light transmittance state recorded by the image collector 18. The bottom end of the image collector 18 is fixedly connected to the surface of the chassis body 1, and the lens of the image collector 18 is set toward the mapping plate 3. The image collector 18 will capture the light transmittance image projected through the fabric on the mapping plate 3 and submit it to the sensor collector 20.

[0023] Compared with the existing technology, through the synergistic effect of the hydraulic telescopic rod 5 and the test light board 8, the fabric is actively tightened during the detection process to simulate the actual pressure state, and 360° dynamic light source scanning is performed simultaneously, so that the subtle and hidden gap defects on the fabric surface form a magnified projection effect on the mapping board 3, completely eliminating the shadow blind spots caused by fabric wrinkles in traditional fixed light sources, thereby significantly improving the defect detection rate and detection accuracy, and ultimately ensuring the product yield.

[0024] In other aspects, this embodiment also provides another optimization mechanism based on embodiment 1, specifically a working logic of the sensor collector 20, including the following steps: Step 1: Collect the light intensity data of the fabric surface, receive the light transmission image data recorded by the image collector 18, and perform pre-processing; Step 2: Correlate the corresponding position points in the light intensity data and the light transmission image data; Step 3: Based on the associated location point data, obtain the average value and standard deviation of the overall light transmittance of the fabric; Step 4: Divide the fabric into several grid areas and calculate the local variance of the light transmittance in each grid area; Step 5: Set the uniformity assessment threshold. When the standard deviation exceeds the first threshold, or there is a grid area with a local variance exceeding the second threshold, the fabric light transmittance uniformity is judged to be unqualified. The area below the overall average value (the third threshold) is marked as a low light transmittance defect area, and the area above the overall average value (the fourth threshold) is marked as a high light transmittance defect area. Step 6: Map the position coordinates of the defect area to the light transmission image collected by the image collector 18 to generate a fabric detection map with defect positioning marks.

[0025] Compared with the existing technology, the accuracy and detail of the fabric transmittance uniformity assessment are effectively improved by analyzing the correlation between the fabric surface light intensity data and the transmittance image data, and adopting the regional local variance calculation and threshold judgment method. It can accurately identify tiny defect areas, which is significantly better than the traditional single global statistical or static detection method, ensuring the comprehensiveness and high sensitivity of defect detection, thereby greatly improving the reliability and detection efficiency of fabric quality control.

[0026] Working Principle: During implementation, the user first inserts the four corners of the fabric to be tested into the connecting clamp rod 10. By rotating the screw rod 16, the threaded portion and the fixed clamp plate 17's movement trajectory are limited by the connecting clamp rod 10. This causes the fixed clamp plate 17 to move with the rotation of the screw rod 16 and gradually clamp the fabric. The test light board 8 then adheres to the fabric surface with a preset pressure. The user then stands up the mapping board 3 and rotates the support plate 19 to support it on the base frame 1, so that the support plate 19 provides support for the mapping board 3. The user activates the hydraulic telescopic rod 5 and the test light board 8. During the activation of the hydraulic telescopic rod 5, the lead screw 6 synchronously drives the connecting rod 14 to move, and the connecting rod 14 drives the connecting rod 13 to swing. The support frame 15 restricts the movement trajectory of the sector gear 12, so that the movement trajectory of the sector gear 12 is centered on the support frame 15. When the connecting rod 13 swings under force, it synchronously drives the sector gear 12 to rotate partially. Through the meshing transmission of the transmission gear block 11 on the sector gear 12, the connecting clamp rod 10 drives the fixed fabric to continue to straighten; When the output rod of the hydraulic telescopic rod 5 drives the screw 6 to move, the screw 6 moves in the sleeve 7, causing the ball 9 to spirally slide along the surface of the screw 6 and drive the sleeve 7 to rotate at the left end of the fixed frame 4. During the rotation of the sleeve 7, the test light board 8 is driven to rotate. After the test light board 8 is started, the light source is projected onto the surface of the mapping plate 3 through the fabric, and the image collector 18 captures the light transmittance status information of the surface of the mapping plate 3. The light intensity data of the fabric surface is collected through the sensor collector 20, and the corresponding position points in the light intensity data and the light transmittance status information are correlated. Based on the correlated data, the light transmittance consistency of each area of ​​the fabric is analyzed to evaluate the uniformity, and the abnormal light transmittance intensity area is identified to locate defects.

[0027] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A sofa fabric surface quality detection device, characterized in that: The invention comprises a base frame body (1), a limit frame (2) is provided at the top of the base frame body (1), four connecting clamping rods (10) for fixing the fabric are evenly provided inside the limit frame (2), a hydraulic telescopic rod (5) and a test light board (8) are provided inside the limit frame (2), and the hydraulic telescopic rod (5) drives the four connecting clamping rods (10) to straighten the fixed fabric when the hydraulic telescopic rod (5) is in the starting state, so that the test light board (8) is attached to the surface of the stretched fabric with a predetermined pressure and rotates around its central axis, and performs Light irradiation detection, the left end of the chassis body (1) is provided with a mapping plate (3) used as a light-transmitting bearing surface, the top of the limit frame (2) is provided with an image collector (18) for recording the light transmittance state of the surface of the mapping plate (3), the top of the test light board (8) is provided with a sensor collector (20), the sensor collector (20) is used to detect the light intensity signal of each position point of the fabric in real time, and combine the light transmittance state recorded by the image collector (18) to evaluate and output the light transmittance uniformity and defect data of the fabric.

2. A sofa fabric surface quality detection device according to claim 1, characterized in that: The surface of the hydraulic telescopic rod (5) is sleeved with a fixing frame (4), the right end of the fixing frame (4) is fixedly connected to the top of the base frame body (1), the outer rod of the hydraulic telescopic rod (5) is fixedly connected to the top of the base frame body (1), the output rod of the hydraulic telescopic rod (5) is fixedly connected to a lead screw (6), the surface of the lead screw (6) is sleeved with a sleeve (7), the left end of the sleeve (7) is fixedly connected to the top of the test light board (8), and the surface of the sleeve (7) is rotatably connected to the left end of the fixing frame (4).

3. A sofa fabric surface quality detection device according to claim 2, characterized in that: The right end of the sleeve (7) is rotatably connected to a ball (9), and the ball (9) is slidably connected to the surface of the lead screw (6).

4. A sofa fabric surface quality detection device according to claim 2, characterized in that: One end of the connecting clamp rod (10) is slidably connected to the surface of the limit frame (2), and the surface of the connecting clamp rod (10) is evenly fixedly connected to the transmission gear block (11). One side of the connecting clamp rod (10) is provided with a fan gear (12), and the fan gear (12) is meshed and connected with the transmission gear block (11). The surface of the fan gear (12) is rotatably connected to the support frame (15), and one end of the support frame (15) is fixedly connected to the surface of the limit frame (2). One end of the fan gear (12) is rotatably connected to the connecting rod (13), and one end of the connecting rod (13) is rotatably connected to the connecting rod (14). One end of the connecting rod (14) is fixedly connected to one end of the lead screw (6).

5. The sofa fabric surface quality detection device according to claim 1, characterized in that: The surface of the connecting clamp rod (10) is connected to a spiral rod (16) by screw thread rotation, the interior of the connecting clamp rod (10) is slidably connected to a fixed clamp plate (17), and one end of the spiral rod (16) is fixedly connected to the surface of the fixed clamp plate (17).

6. The sofa fabric surface quality detection device according to claim 1, characterized in that: The test light board (8) is an LED light board, and the light-emitting surface of the test light board (8) is evenly distributed on the side in contact with the fixed fabric.

7. The sofa fabric surface quality detection device according to claim 1, characterized in that: The telescopic action of the hydraulic telescopic rod (5) includes two stages: in the first stage, the four connecting clamping rods (10) are driven to move outward to a preset tension position to straighten the fabric; in the second stage, while the fabric is continuously stretched, the test light board (8) is triggered and cooperated with to perform a rotation detection action.

8. The sofa fabric surface quality detection device according to claim 1, characterized in that: The bottom end of the image collector (18) is fixedly connected to the surface of the chassis body (1), and the lens of the image collector (18) is arranged toward the mapping plate (3). The image collector (18) captures a light-transmitting image projected onto the mapping plate (3) through the fabric and transmits the image to the sensor collector (20).

9. The sofa fabric surface quality detection device according to claim 1, characterized in that: The sensor collector (20) is installed at the left end of the fixing frame (4). The working logic of the sensor collector (20) includes the following steps: Step 1: Collecting the light intensity data of the fabric surface, receiving the light transmission image data recorded by the image collector (18), and performing pre-processing; Step 2: Correlating the light intensity data with corresponding position points in the light transmission image data; Step 3: Based on the associated location point data, obtain the average value and standard deviation of the overall light transmittance of the fabric; Step 4: Divide the fabric into several grid areas and calculate the local variance of the light transmittance in each grid area; Step 5: Set a uniformity assessment threshold. When the standard deviation exceeds the first threshold, or there is a grid area with a local variance exceeding the second threshold, the fabric light transmittance uniformity is determined to be unqualified. The area below the overall average value (the third threshold) is marked as a low light transmittance defect area, and the area above the overall average value (the fourth threshold) is marked as a high light transmittance defect area. Step 6: Map the position coordinates of the defect area to the light transmission image collected by the image collector (18) to generate a fabric detection map with defect positioning marks.

10. The sofa fabric surface quality detection device according to claim 1, characterized in that: The bottom end of the mapping plate (3) is rotatably connected to the top end of the chassis body (1), and the left and right sides of the bottom end of the mapping plate (3) are both rotatably connected to support plates (19).

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