Sponge quality detection device and detection method thereof

Abstract

The invention relates to a sponge quality detection device, which comprises a detection table and a press machine, a test table top for placing a sponge block to be detected is formed on the detection table, the press machine is arranged at the top of the detection table, and the press machine is used for performing a pressure test on the sponge block on the test table top. The device further comprises a curtain wall assembly, an imaging assembly and a light supplementing assembly, the curtain wall assembly is arranged on one side of the detection table, the curtain wall assembly is provided with background cloth capable of being rolled or unfolded, the background cloth forms an imaging background of the sponge block on the test table surface after being unfolded, and the imaging assembly and the light supplementing assembly are arranged on the other side opposite to the curtain wall assembly. Through the arrangement of the quality detection device for the sponge, the testing time can be shortened when the processed sponge block is subjected to an elastic recovery performance test, and the quality detection efficiency of the sponge block is improved, so that the elastic recovery performance test can be uniformly and quickly carried out when the sponge leaves a factory.

Description

Technical Field

[0001] The present application relates to the technical field of sponge quality detection, and in particular to a sponge quality detection device and a detection method thereof. Background Art

[0002] The commonly used sponges are made of wood cellulose fibers or foamed plastic polymers. In many cushions or mattresses, sponges are often used for filling. In order to make cushions or mattresses more comfortable, the elastic recovery ability of the sponge is very high. Poor quality sponges will greatly reduce the user experience of cushions or mattresses. Therefore, it is necessary to test the elastic recovery ability of the sponge to test the quality of the sponge.

[0003] In common sponge testing experiments, a press is generally used to apply a certain amount of pressure to a sponge block to deform it, and then the time required for the sponge block to recover is observed to evaluate the elastic recovery ability of the sponge. However, since it takes a certain amount of time for a sponge to recover after being squeezed and deformed, if an elastic recovery test is performed after each sponge block is produced, each sponge needs to wait for the above recovery time, which will extend the sponge production time and reduce production efficiency. Summary of the invention

[0004] In order to improve the problems raised in the above background technology, the present application provides a sponge quality detection device and a detection method thereof.

[0005] The present application provides a sponge quality detection device and a detection method thereof using the following technical solutions: A sponge quality inspection device comprises a testing platform and a press, wherein a test table surface is formed on the testing platform for placing a sponge block to be inspected, the press is installed on the top of the testing platform and is used for applying pressure to the sponge block on the test table surface for testing, and further comprises a curtain wall component, an imaging component and a fill light component, wherein the curtain wall component is arranged on one side of the testing platform, and the curtain wall component has a background cloth that can be rolled up or unfolded, and the background cloth forms an imaging background of the sponge block on the test table surface after unfolding, the imaging component and the fill light component are arranged on the other side opposite to the curtain wall component, the imaging component is provided with a visual sensor facing the sponge block on the test table surface, the visual sensor is used for imaging, capturing and outputting an image of the elastic recovery state of the sponge block, the fill light component is arranged at a position close to the imaging component, and the fill light component is provided with a fill light with an adjustable position state, and the fill light is used for adjusting the illumination state of the sponge block on the test table surface when imaging.

[0006] Furthermore, the curtain wall assembly also includes a bracket, a retractable motor, a winding roller, a magnetic block and a positioning seat. The retractable motor is installed on the top of the bracket, and the output end of the retractable motor is connected to the winding roller. The upper end of the background cloth is fixed on the outer wall of the winding roller, and the magnetic block is inserted into the lower end of the background cloth and fixedly connected thereto. The positioning seat is formed on the inner bottom of the bracket, and a slot matching the magnetic block is formed on the positioning seat.

[0007] Furthermore, the imaging assembly also includes a support tube, a fixed plate and a locking piece. The fixed plate is arranged above the support tube, and the fixed plate and the support tube are fixedly connected by a locking piece. A hollow inner cavity is formed on the support tube, and the wire connected to the visual sensor passes through the inner cavity of the support tube.

[0008] Furthermore, the fill light assembly also includes an up and down swing adjustment part and a left and right swing adjustment part, the up and down swing adjustment part is used to adjust the up and down deflection angle state of the fill light, and the left and right swing adjustment part is used to adjust the left and right deflection angle state of the fill light, the up and down swing adjustment part includes a support, a rotating shaft, a fixed seat, a deflection motor, a transmission assembly and a connecting shaft, the rotating shaft is inserted into the top of the support and rotatably connected thereto, the fill light is installed and fixed on the fixed seat, and the bottom of the fixed seat is sleeved on the rotating shaft and fixedly connected thereto, and the deflection motor is installed inside the support The bottom, and the output end of the deflection motor and the rotating shaft are connected by transmission assembly, the connecting shaft is formed on the side wall of the bottom of the support platform, and the connecting shaft is used to cooperate with the connection of the left and right swing adjustment part, the left and right swing adjustment part includes a base, a first positioning frame, a second positioning frame and a linear push rod, the lower ends of the first positioning frame and the second positioning frame are fixedly connected to the base, the top end of the first positioning frame is rotatably connected to the bottom of the support platform, the output end of the linear push rod is sleeved on the connecting shaft and rotatably connected thereto, and the other end of the linear push rod is rotatably connected to the top of the second positioning frame.

[0009] Furthermore, the sponge quality inspection device also includes an adsorption component, a bottom cavity is formed at the bottom of the inspection table, the adsorption component is installed in the bottom cavity, and the adsorption component is used to adsorb and fix the sponge block on the test table surface, the adsorption component includes an air pump, a conducting part, an equal number of connecting pipes and a suction cup, the air pump is installed on the bottom wall of the bottom cavity, and the air suction port of the air pump is connected with the conducting part, the top of each suction cup is passed through to be flush with the upper surface of the test table surface, and the bottom of each suction cup is connected with the conducting part by a connecting pipe.

[0010] A method for detecting the quality of a sponge comprises the following steps: Step 1: Place the sponge block to be tested on the test table, use the negative pressure of the adsorption component to adsorb the sponge block on the test table, and fix the position of the sponge block on the test table; Step 1: unfold the background cloth in the curtain wall assembly, and use the magnetic attraction between the magnetic block and the slot to flatten and fix the background cloth; Step, start the press, use the press to apply a constant squeezing force to the sponge sample at a certain speed until the sponge block reaches a predetermined compression amount, and record the time points of the start and end of the squeezing, as well as the height of the compressed sponge block; Step 1: After the press is reset, the visual sensor in the imaging component is used to capture the recovery of the sponge block, and the elastic recovery performance of the sponge block is evaluated in combination with the recovery time and recovery height of the sponge block.

[0011] Furthermore, the step of capturing the recovery of the sponge block by imaging with a visual sensor includes the following two methods: imaging method one, capturing the sponge block recovering to an initial height or close to an initial height, recording the time required for the sponge block to recover to an initial height or close to an initial height, and obtaining a basic coefficient of the recovery time; imaging method two, presetting an initial time period of a fixed length, capturing the height state of the sponge block recovery after the initial time period; in the process of capturing the recovery of the sponge block by imaging with a visual sensor, imaging method two is used for each sponge block passing through the test table, and imaging method one is used for the sponge block passing through the test table at intervals.

[0012] Furthermore, the sponge block images output by the visual sensor in imaging mode 1 and imaging mode 2 are also pre-processed by a computer system, so that the computer system obtains the sponge block features in the sponge block images, and then the computer system estimates the overall recovery time of the sponge in combination with a calculation formula. Among them, the calculation formula for image preprocessing of the sponge block image is as follows: ; ; is the pixel value of the image after filtering; is the original image pixel value; For The neighborhood window centered at ; For Window The total number of pixels in ; is the gray value after equalization; is the original gray value; Grayscale The number of pixels; is the total number of pixels in the image; After image preprocessing of the sponge block image, a grayscale image of the sponge block image can be obtained. According to the difference in grayscale values ​​between the sponge block part and the image background part, the size of the image area occupied by the sponge block can be counted, thereby measuring the area and height of the sponge block. The computer system estimates the overall recovery time of the sponge using the following formula: is the estimated overall recovery time; The recovery time basic coefficient indicates the benchmark value of the time required for the sponge to fully recover from deformation under standard conditions; is the initial recovery rate, which indicates the proportion of sponge recovery in the initial time period; is the nonlinear factor of the recovery rate, which is used to indicate the nonlinear degree of the recovery rate changing with time; is the recovery rate, which indicates the proportion of sponge recovery per unit time; is the recovery rate adjustment factor, which is used to indicate the impact of external environmental conditions on the recovery rate; is the recovery time-recovery rate relationship index, which is used to represent the nonlinear relationship between recovery time and recovery rate; is the initial recovery time, i.e., the time period corresponding to the measurement of the initial recovery rate; is the additional recovery time, which is used to indicate the time that the sponge continues to slowly recover after the initial recovery phase.

[0013] By setting up the sponge quality inspection device and applying the sponge quality inspection method, the test time of the processed sponge block can be shortened when conducting the elastic recovery performance test, thereby improving the efficiency of the sponge block quality inspection, so as to facilitate the unified and rapid elastic recovery performance test of the sponge before leaving the factory.

[0014] The beneficial technical effect of the present application is: through the setting of the sponge quality inspection device and the application of the sponge quality inspection method, the test time of the processed sponge block can be shortened when conducting the elastic recovery performance test, and the efficiency of the sponge block quality inspection is improved, so that the elastic recovery performance test can be uniformly and quickly conducted when the sponge leaves the factory. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1is a schematic structural diagram of a sponge quality detection device according to an embodiment of the present application; Figure 2 yes Figure 1 A schematic diagram of the structure of the quality detection device for the middle sponge at another angle; Figure 3 It is a schematic diagram of the structure of the adsorption component in the embodiment of the present application; Figure 4 It is a structural schematic diagram of a curtain wall assembly in an embodiment of the present application; Figure 5 is a schematic diagram of the structure of the imaging assembly in an embodiment of the present application; Figure 6 It is a structural schematic diagram of the fill light component in the embodiment of the present application.

[0016] Figure numerals: 10, test bench; 11, test bench; 12, bottom cavity; 20, press machine; 30, adsorption assembly; 31, air pump; 32, conduction part; 33, connecting pipe; 34, suction cup; 40, curtain wall assembly; 41, bracket; 42, retractable motor; 43, rewinding roller; 44, background cloth; 45, magnetic block; 46, positioning seat; 47, slot; 50, imaging assembly; 51, support tube; 52, fixed plate ; 53. Locking piece; 54. Visual sensor; 541. Wire; 60. Fill light assembly; 61. Fill light; 62. Up and down swing adjustment unit; 621. Support platform; 622. Rotating shaft; 623. Fixed seat; 624. Deflection motor; 625. Transmission assembly; 626. Connecting shaft; 63. Left and right swing adjustment unit; 631. Base; 632. First positioning frame; 633. Second positioning frame; 634. Linear push rod. DETAILED DESCRIPTION

[0017] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0018] The embodiment of the present application discloses a sponge quality detection device and a detection method thereof.

[0019] Reference Figure 1 and Figure 2The quality inspection device of the sponge may include a test bench 10, a press 20, an adsorption assembly, a curtain wall assembly 40, an imaging assembly 50 and a fill light assembly 60. A test bench 10 is formed with a test bench 11 for placing the sponge block to be inspected, and a bottom cavity 12 is formed at the bottom of the test bench 10, and an adsorption assembly 30 is installed in the bottom cavity 12. The adsorption assembly 30 can be used to fix the sponge block on the test bench 11 by negative pressure adsorption, and then the press 20 installed on the top of the test bench 10 can press the sponge block on the test bench 11 to deform it. The curtain wall assembly 40 is arranged on one side of the test bench 10, and the imaging assembly 50 and the fill light assembly 60 are arranged on the other side opposite to the curtain wall assembly 40. The curtain wall assembly 40 has a background cloth 44 that can be rolled up or unfolded, and the background cloth 44 can form an imaging background of the sponge block on the test bench 11 after being unfolded, and the background cloth 44 can be a color with a large contrast with the color of the sponge block. The imaging component 50 is provided with a visual sensor 54 facing the sponge block on the test table 11, and the visual sensor 54 is used to image, capture and output an image of the elastic recovery state of the sponge block. The fill light component 60 is arranged at a position close to the imaging component 50, and the fill light component 60 is provided with a fill light 61 whose position state can be adjusted. The fill light 61 is used to adjust the lighting state when the sponge block on the test table 11 is imaged, so that the imaging effect of the visual sensor 54 is better.

[0020] In this embodiment, the press 20 can use existing equipment in the prior art, and when the press 20 applies pressure, a constant squeezing force is applied to the sponge sample at a certain speed until the sponge reaches a predetermined compression amount, such as 50% or 75% of the original height. Sponge, as a porous material, has good elasticity and compressibility. When the sponge is squeezed by an external force, the pores inside it will be compressed, resulting in a change in shape. The recovery ability of the sponge mainly comes from its internal pore structure and material properties. By recording the time from the sponge being squeezed and deformed to completely recovering to its original state, the quality of its elastic recovery performance can be intuitively evaluated. If the sponge can recover to its original shape and size in a relatively short time, it means that its elastic recovery performance is good; conversely, if the recovery time is longer, it means that its elastic recovery performance is poor. In addition to the elastic recovery performance, this test process can also be used to evaluate the shape memory performance of the sponge. Shape memory performance refers to the ability of the material to maintain a certain shape memory effect after being subjected to an external force, that is, the material can recover to its original shape after the external force is removed. For sponges, if they can quickly and accurately return to their original shape after being squeezed, then they can be considered to have good shape memory properties. In the fields of furniture, mattresses, cushions, etc., sponges are the main filling materials, and their elastic recovery and shape memory properties will directly affect the comfort and service life of the product. If the elastic recovery of the sponge is poor, then after long-term use, its shape may change, causing the product to lose its original comfort and support.

[0021] See also Figure 3 The adsorption assembly 30 may include an air pump 31, a conducting part 32, an equal number of connecting pipes 33 and a suction cup 34. The air pump 31 is installed on the bottom wall of the bottom cavity 12, and the air suction port of the air pump 31 is connected to the conducting part 32. The top of each suction cup 34 is passed through to be flush with the upper surface of the test bench 11, and the bottom of each suction cup 34 is connected to the conducting part 32 by a connecting pipe 33. When the air pump 31 is evacuating air, the connecting pipe 33 connected to the conducting part 32 can be used to generate negative pressure at the suction cup 34, and the suction cup 34 arranged at the bottom of the sponge block can suck the sponge block to keep it in position. It can be understood that after the sponge block is placed on the test bench 11, it can also be fixed in position by a clamp already available in the prior art.

[0022] See also Figure 4The curtain wall assembly 40 may include a bracket 41, a retractable motor 42, a winding roller 43, a background cloth 44, a magnetic block 45 and a positioning seat 46. The retractable motor 42 is installed on the top of the bracket 41, and the output end of the retractable motor 42 is connected to the winding roller 43, so that the winding roller 43 can be driven to rotate. The upper end of the background cloth 44 is fixed on the outer wall of the winding roller 43, so that the background cloth 44 can be rolled up or released downward by the rotating winding roller 43. The magnetic block 45 is inserted at the lower end of the background cloth 44 and fixedly connected thereto, and the magnetic block 45 can be made of a magnetic material, or a magnetic material is arranged below it. The positioning seat 46 that can be adsorbed by a magnet is formed at the inner bottom of the bracket 41, and a slot 47 that matches the magnetic block 45 is formed on the positioning seat 46, so that the magnetic block 45 enters the slot 47 and adsorbs its inner wall, and keeps the background cloth 44 flat.

[0023] See also Figure 5 The imaging assembly 50 may include a support tube 51, a fixed disk 52, a locking member 53, and a visual sensor 54. The fixed disk 52 is disposed above the support tube 51, and the fixed disk 52 and the support tube 51 are fixedly connected together by the locking member 53. A hollow inner cavity is formed on the support tube 51, and a wire 541 connected to the visual sensor 54 can pass through the inner cavity of the support tube 51 and be connected to the computer system.

[0024] See also Figure 6 The fill light assembly 60 may include a fill light 61, an up-and-down swing adjustment unit 62, and a left-and-right swing adjustment unit 63. The up-and-down swing adjustment unit 62 is used to adjust the up-and-down deflection angle of the fill light 61, and the left-and-right swing adjustment unit 63 is used to adjust the left-and-right deflection angle of the fill light 61. By adjusting the direction of the fill light 61 by the up-and-down swing adjustment unit 62 and the left-and-right swing adjustment unit 63, the lighting state of the sponge block can be changed.

[0025] In this embodiment, the up-and-down swing adjustment part 62 includes a support platform 621, a rotating shaft 622, a fixed seat 623, a deflection motor 624, a transmission assembly 625, and a connecting shaft 626. The rotating shaft 622 is inserted at the top of the support platform 621 and is rotatably connected thereto, the fill light 61 is mounted and fixed on the fixed seat 623, and the bottom of the fixed seat 623 is sleeved on the rotating shaft 622 and is fixedly connected thereto, so that the fixed seat 623 and the fill light 61 can perform deflection activities in the front-back direction by using the rotating shaft 622. The deflection motor 624 is installed at the inner bottom of the support platform 621, and the output end of the deflection motor 624 and the rotating shaft 622 are both connected by transmission by the transmission assembly 625, and the transmission assembly can adopt common belt transmission, gear transmission or chain transmission, so that the rotating shaft 622 can generate a deflection action by the deflection of the output end of the deflection motor 624 and the transmission of the transmission assembly 625. The connecting shaft 626 is formed on the bottom side wall of the support platform 621 , and the connecting shaft 626 is used to cooperate with the connection of the left and right swing adjustment part 63 .

[0026] In this embodiment, the left-right swing adjustment part 63 includes a base 631, a first positioning frame 632, a second positioning frame 633 and a linear push rod 634. The lower ends of the first positioning frame 632 and the second positioning frame 633 are fixedly connected to the base 631. The top of the first positioning frame 632 is rotatably connected to the bottom of the support platform 621, so that the up-down swing adjustment part 62 and the fill light 61 can perform a deflection activity in the left-right direction at the first positioning frame 632. The output end of the linear push rod 634 is sleeved on the connecting shaft 626 and is rotatably connected thereto, and the other end of the linear push rod 634 is rotatably connected to the top of the second positioning frame 633, so that when the output end of the linear push rod 634 produces a telescopic action, it can drive the up-down swing adjustment part 62 and the fill light 61 to perform a deflection activity in the left-right direction. The linear push rod 634 can adopt an electric push rod, a pneumatic push rod or a hydraulic push rod, etc., which have an output end that can move along a straight line, which are already available in the prior art.

[0027] The quality inspection method of the sponge comprises the following steps: Step 1: Place the sponge block to be tested on the test table 11, use the adsorption component 30 to absorb the sponge block on the test table 11 with negative pressure or use a clamp to clamp the sponge block on the test table 11, and fix the position of the sponge block on the test table 11.

[0028] Step 2: unfold the background cloth 44 in the curtain wall assembly 40 , and use the magnetic attraction between the magnetic block 45 and the slot 47 to flatten and fix the background cloth 44 .

[0029] Step 3, start the press 20, and use the press 20 to apply a constant squeezing force to the sponge sample at a certain speed until the sponge block reaches a predetermined compression amount, and record the time points of the start and end of the squeezing, as well as the height of the compressed sponge block.

[0030] Step 4, after the press 20 is reset, the visual sensor 54 in the imaging assembly 50 is used to capture the recovery of the sponge block, and the elastic recovery performance of the sponge block is evaluated in combination with the recovery time and recovery height of the sponge block. The visual sensor 54 can capture the recovery of the sponge block in the following two ways: Imaging method 1, imaging capture of the sponge block recovering to the initial height or close to the initial height, recording the time required for the sponge block to recover to the initial height or close to the initial height, and obtaining the basic coefficient of the recovery time; Imaging method 2, presetting an initial time period of a fixed length, and capturing the height state of the sponge block recovery after the initial time period. In the process of the visual sensor 54 imaging and capturing the recovery of the sponge block, the imaging method 2 is used for each sponge block passing through the test table 11 to capture and output the sponge block image to shorten the detection time. And the imaging method 1 is used to capture and output the sponge block image periodically for the sponge block passing through the test table 11 to correct the estimation of the elastic recovery ability of the sponge block.

[0031] In this embodiment, the sponge block images output by the visual sensor 54 in both imaging mode 1 and imaging mode 2 need to be preprocessed by a computer system so that the computer system can obtain the sponge block features in the sponge block images. For example, the following calculation process can be performed when the sponge block images are preprocessed: in, is the pixel value of the image after filtering; is the original image pixel value; For The neighborhood window centered at ; For Window The total number of pixels in ; This formula is used to remove noise from an image by calculating the average value of the pixel values ​​within the neighborhood window to replace the central pixel value.

[0032] ; in, is the gray value after equalization; is the original gray value; Grayscale The number of pixels; is the total number of pixels in the image; This formula is used to enhance the contrast of an image by redistributing the grayscale values ​​so that the pixel values ​​in the image are more evenly distributed.

[0033] After image preprocessing of the sponge block image, a grayscale image of the sponge block image can be obtained. According to the difference in grayscale values ​​between the sponge block part and the image background part, the size of the image area occupied by the sponge block can be counted, thereby measuring the area and height of the sponge block.

[0034] After processing the image of the sponge block and measuring the area and height of the sponge block, the overall recovery time of the sponge can be estimated using a computer system. The estimated calculation process is as follows: in, is the estimated overall recovery time; The recovery time basic coefficient represents the reference value of the time required for the sponge to fully recover from deformation under standard conditions. It can be obtained based on the time required by imaging method 1 or by fitting experimental data in advance. The consistency of experimental conditions needs to be ensured. is the initial recovery rate, which indicates the proportion of sponge recovery in the initial time period. It can be calculated by analyzing the sponge block image obtained by imaging mode 2 or imaging mode 2, comparing the deformed image with the restored image, and calculating the recovery proportion; is the nonlinear factor of the recovery rate, which is used to indicate the nonlinear degree of the recovery rate changing with time. It can be obtained by fitting experimental data in combination with nonlinear regression. For example, it can be described by the following nonlinear function: ,in, For in time The recovery rate (i.e. the proportion of recovery) when is the final recovery rate, that is, the maximum proportion to which the sponge block can recover when time tends to infinity (theoretically it should be 1, but in practice it may deviate slightly due to material properties or measurement errors), is the effective recovery time constant, which indicates the time required for the sponge block to recover to a certain proportion. is the parameter we hope to obtain through nonlinear regression fitting. For recovery time; is the recovery rate, which indicates the proportion of sponge recovery per unit time and can be measured through experimental data; It is the recovery rate adjustment factor, which is used to represent the impact of external environmental conditions on the recovery rate. It can also be obtained by recording the recovery rate data under different environmental conditions (temperature, humidity), and then fitting these data using a nonlinear regression method. In an ideal state, it can also be set to 1; It is the recovery time-recovery rate relationship index, which is used to express the nonlinear relationship between recovery time and recovery rate. It can be obtained by combining the following calculation formula with experimental data: ,in, For in time The recovery rate, is the initial recovery rate, i.e., at time The recovery rate, is the characteristic time constant, which indicates the time required for the recovery rate to drop to a certain ratio; is the initial recovery time, i.e., the time period corresponding to the measurement of the initial recovery rate; The additional recovery time is used to indicate the time that the sponge continues to slowly recover after the initial recovery stage. The recovery degree of the sponge block at different time points can be recorded according to the preliminary experiment, and then the recovery degree of the sponge block in the second imaging method is compared with the recovery degree of the sponge block at different time points recorded in the preliminary experiment to obtain the corresponding remaining recovery time.

[0035] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A sponge quality inspection device, comprising a test bench (10) and a press (20), wherein the test bench (10) is formed with a test table (11) on which a sponge block to be inspected is placed, and the press (20) is installed on the top of the test bench (10), and is used to apply pressure to the sponge block on the test table (11) for testing, characterized in that: The invention also comprises a curtain wall component (40), an imaging component (50) and a fill light component (60), wherein the curtain wall component (40) is arranged on one side of the test bench (10), and the curtain wall component (40) has a background cloth (44) that can be rolled up or unfolded, and the background cloth (44) forms an imaging background of the sponge block on the test bench surface (11) after being unfolded, and the imaging component (50) and the fill light component (60) are arranged on the other side opposite to the curtain wall component (40), and the imaging component (50) is provided with a visual sensor (54) facing the sponge block on the test bench surface (11), and the visual sensor (54) is used for imaging, capturing and outputting an image of the elastic recovery state of the sponge block, and the fill light component (60) is arranged at a position close to the imaging component (50), and the fill light component (60) is provided with a fill light (61) whose position state can be adjusted, and the fill light (61) is used for adjusting the lighting state of the sponge block on the test bench surface (11) when imaging.

2. A sponge quality detection device according to claim 1, characterized in that: The curtain wall assembly (40) further comprises a bracket (41), a retractable motor (42), a winding roller (43), a magnetic block (45) and a positioning seat (46); the retractable motor (42) is mounted on the top of the bracket (41), and the output end of the retractable motor (42) is connected to the winding roller (43); the upper end of the background cloth (44) is fixed to the outer wall of the winding roller (43); the magnetic block (45) is inserted into the lower end of the background cloth (44) and is fixedly connected thereto; the positioning seat (46) is formed on the inner bottom of the bracket (41), and a slot (47) matching the magnetic block (45) is formed on the positioning seat (46).

3. A sponge quality detection device according to claim 1, characterized in that: The imaging assembly (50) further comprises a support tube (51), a fixed disk (52) and a locking member (53); the fixed disk (52) is arranged above the support tube (51), and the fixed disk (52) and the support tube (51) are fixedly connected by means of the locking member (53); a hollow inner cavity is formed on the support tube (51), and a wire (541) connected to the visual sensor (54) passes through the inner cavity of the support tube (51).

4. A sponge quality detection device according to claim 1, characterized in that: The fill light assembly (60) further comprises an up-and-down swing adjustment portion (62) and a left-and-right swing adjustment portion (63), wherein the up-and-down swing adjustment portion (62) is used to adjust the up-and-down deflection angle state of the fill light (61), and the left-and-right swing adjustment portion (63) is used to adjust the left-and-right deflection angle state of the fill light (61). The up-and-down swing adjustment part (62) comprises a support platform (621), a rotating shaft (622), a fixing seat (623), a deflection motor (624), a transmission assembly (625) and a connecting shaft (626); the rotating shaft (622) is inserted into the top of the support platform (621) and is rotatably connected thereto; the fill light (61) is mounted and fixed on the fixing seat (623); the bottom of the fixing seat (623) is sleeved on the rotating shaft (622) and is fixedly connected thereto; the deflection motor (624) is mounted on the inner bottom of the support platform (621); the output end of the deflection motor (624) and the rotating shaft (622) are both connected by transmission via the transmission assembly (625); the connecting shaft (626) is formed on the bottom side wall of the support platform (621); and the connecting shaft (626) is used to cooperate with the connection of the left-and-right swing adjustment part (63); The left-right swing adjustment part (63) comprises a base (631), a first positioning frame (632), a second positioning frame (633) and a linear push rod (634); the lower ends of the first positioning frame (632) and the second positioning frame (633) are fixedly connected to the base (631); the top end of the first positioning frame (632) is rotatably connected to the bottom of the support platform (621); the output end of the linear push rod (634) is sleeved on the connecting shaft (626) and rotatably connected thereto; the other end of the linear push rod (634) is rotatably connected to the top of the second positioning frame (633).

5. A sponge quality detection device according to any one of claims 1 to 4, characterized in that: It also comprises an adsorption component (30), the bottom of the testing platform (10) forms a bottom cavity (12), the adsorption component (30) is installed in the bottom cavity (12), and the adsorption component (30) is used to adsorb and fix the sponge block on the test platform surface (11).

6. A sponge quality detection device according to claim 5, characterized in that: The adsorption assembly (30) comprises an air pump (31), a conducting part (32), an equal number of connecting pipes (33) and suction cups (34); the air pump (31) is mounted on the bottom wall of the bottom cavity (12), and the air suction port of the air pump (31) is connected to the conducting part (32); the top of each suction cup (34) protrudes to be flush with the upper surface of the test bench (11), and the bottom of each suction cup (34) is connected to the conducting part (32) via a connecting pipe (33).

7. A method for detecting the quality of a sponge according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: placing a sponge block to be tested on a test table (11), using an adsorption assembly (30) to negatively adsorb the sponge block on the test table (11), and fixing the position of the sponge block on the test table (11); Step 2, unfold the background cloth (44) in the curtain wall assembly (40), and use the magnetic attraction between the magnetic attraction block (45) and the slot (47) to flatten and fix the background cloth (44); Step 3, starting the press (20), applying a constant squeezing force to the sponge sample at a certain speed using the press (20), until the sponge block reaches a predetermined compression amount, and recording the time points of the start and end of squeezing, as well as the height of the sponge block after compression; Step 4: After the press machine (20) is reset, the visual sensor (54) in the imaging assembly (50) is used to capture the recovery of the sponge block, and the elastic recovery performance of the sponge block is evaluated in combination with the recovery time and recovery height of the sponge block.

8. A method for detecting the quality of a sponge according to claim 7, characterized in that: In step 4, the visual sensor (54) captures the recovery status of the sponge block by imaging in the following two ways: Imaging method 1: capturing the sponge block recovering to the initial height or close to the initial height by imaging, recording the time required for the sponge block to recover to the initial height or close to the initial height, and obtaining the basic coefficient of the recovery time; Imaging method 2: presetting an initial time period of fixed length, and capturing the height state of the sponge block after the initial time period; During the process of the visual sensor (54) imaging and capturing the recovery status of the sponge block, the second imaging method is used to capture and output the image of each sponge block passing through the test table (11), and the first imaging method is used to capture and output the image of the sponge block passing through the test table (11) at intervals.

9. A method for detecting the quality of a sponge according to claim 8, characterized in that: The sponge block image output by the visual sensor (54) in the imaging mode 1 and the imaging mode 2 is also pre-processed by the computer system so that the computer system obtains the sponge block features in the sponge block image, and then the computer system estimates the overall recovery time of the sponge in combination with the calculation formula. Among them, the calculation formula for image preprocessing of the sponge block image is as follows: ; ； is the pixel value of the image after filtering; is the original image pixel value; For The neighborhood window centered at ; For Window The total number of pixels in ; is the gray value after equalization; is the original gray value; Grayscale The number of pixels; is the total number of pixels in the image; After image preprocessing of the sponge block image, a grayscale image of the sponge block image can be obtained. According to the difference in grayscale values ​​between the sponge block part and the image background part, the size of the image area occupied by the sponge block can be counted, thereby measuring the area and height of the sponge block. The computer system estimates the overall recovery time of the sponge using the following formula: is the estimated overall recovery time; The recovery time basic coefficient indicates the benchmark value of the time required for the sponge to fully recover from deformation under standard conditions; is the initial recovery rate, which indicates the proportion of sponge recovery in the initial time period; is the nonlinear factor of the recovery rate, which is used to indicate the nonlinear degree of the recovery rate changing with time; is the recovery rate, which indicates the proportion of sponge recovery per unit time; is the recovery rate adjustment factor, which is used to indicate the impact of external environmental conditions on the recovery rate; is the recovery time-recovery rate relationship index, which is used to represent the nonlinear relationship between recovery time and recovery rate; is the initial recovery time, i.e., the time period corresponding to the measurement of the initial recovery rate; is the additional recovery time, which is used to indicate the time that the sponge continues to slowly recover after the initial recovery phase.

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