Corrosion detection device for coating

Abstract

The invention relates to the technical field of paint detection, in particular to a corrosion detection device for paint. The corrosion detection device for the coating comprises a working table, wherein a sliding block is arranged on the working table in a sliding manner. And the sliding driving piece is mounted on the working table, is connected with the sliding block and is used for driving the sliding block to slide on the working table. A mounting frame is fixedly arranged on the working table; and a picture acquisition module is fixedly mounted on the mounting frame and is used for shooting the coating sample wafer passing through the sliding block below the mounting frame and obtaining a sample wafer picture. And the light supplementing module is used for supplementing light to the shot coating sample. And the controller is mounted on the working table and is electrically connected with the rotary driving piece, the picture acquisition module and the light supplementing module. The coating sample can be conveyed through the sliding block, the picture acquisition module shoots for automatic detection, the detection is convenient, automatic feeding is realized, the human subjectivity of manual statistics is avoided, the detection is rapid, and the statistics is accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of coating detection, and in particular to a corrosion detection device for coating. Background Art

[0002] Paint is a material that forms a tough protective or decorative film when applied to surfaces. It is widely used to protect, beautify, or impart special features. The following is a detailed introduction to paint: 1. Paint Composition. Paint typically consists of the following ingredients: Film-forming substances (resins / binders): such as acrylic resins and epoxy resins, determine the paint's adhesion, hardness, and other properties. Pigments: Provide color and hiding power (such as titanium dioxide). Some pigments also have rust-proofing and weather-resistant properties (such as zinc phosphate). Solvents: Adjust the paint's viscosity for ease of application (such as water and organic solvents), which evaporate to form a film. Additives: Improve performance, such as leveling agents (for smooth surfaces), defoamers (for preventing foaming), and UV absorbers (for anti-aging). 2. Main Functions of Paint. Protection: Protects against corrosion (such as metal anti-rust paint), wear, and UV erosion. Decoration: Provides color and gloss (such as wall latex paint and automotive metallic paint). Special Functions: Fire resistance (flame retardant paint), mildew resistance (bathroom paint), thermal insulation (reflective architectural paint), and electrical conductivity (electronic component paint). 3. Classification of coatings. By application: Architectural coatings: interior wall paint, exterior wall paint, floor paint. Industrial coatings: automotive paint, marine anti-corrosion coatings, mechanical equipment coatings. Specialty coatings: fire retardant coatings, conductive coatings, stealth coatings. By form: Solvent-based coatings: traditional paints containing organic solvents (such as nitrocellulose lacquer). Water-based coatings: water-based solvents (such as latex paints), environmentally friendly and low-VOC. Powder coatings: solvent-free, electrostatically sprayed and then cured at high temperatures (used for home appliances and metal parts). By function: anti-corrosion coatings, thermal insulation coatings, antibacterial coatings, etc. 4. Application areas. Construction industry: waterproof coatings for indoor and outdoor walls and roofs. Industrial manufacturing: surface coatings for automobiles, aircraft, and electronic products. Home decoration: wood coatings, artistic coatings. Transportation: anti-corrosion for ships and bridges, road marking coatings. Special applications: high-temperature resistant coatings for spacecraft, antibacterial coatings for hospitals. 5. Environmental trends. With increasing environmental protection requirements, water-based and powder coatings are gradually replacing traditional solvent-based coatings due to their low pollution and low VOC emissions. In addition, research and development directions also include innovative products such as self-healing coatings and photocatalytic air purification coatings.

[0003] Salt spray refers to a diffuse system composed of tiny salt droplets in the atmosphere. Salt spray testing is an environmental test that mainly uses artificial simulated salt spray environmental conditions created by salt spray testing equipment to evaluate the corrosion resistance of products or metal materials. The salt spray test standard clearly and specifically stipulates the salt spray test conditions, such as temperature, humidity, sodium chloride solution concentration and pH value. It also puts forward technical requirements for the performance of salt spray test chambers. Products that need to undergo salt spray testing are mainly metal products, and the corrosion resistance of the products is examined through testing.

[0004] After the salt spray test, paint samples are graded based on the percentage of rusted area or severity of rust. The rusted area is typically calculated visually. A transparent grid of paper (e.g., 1cm x 1cm squares) is placed over the sample surface. The percentage of rusted grids is counted, and the percentage of rusted grids is converted to a percentage. This manual counting process is cumbersome and highly subjective. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides a coating corrosion detection device for detecting a corroded coating sample and evaluating the corrosion results. The coating corrosion detection device may include:

[0006] The work table can be a rectangular plate structure or a steel frame structure; the work table can be provided with a loading position, a detection position and a unloading position, and a sliding block is placed on the work table, and the sliding block can slide on the work table.

[0007] The sliding drive member can be installed on the work surface and connected to the sliding block to drive the sliding block to slide on the work surface.

[0008] The work surface is fixedly mounted on a mounting frame, which may be a gantry structure. Both ends of the mounting frame are bolted to the work surface, and a sliding block can be transported beneath the mounting frame. An image acquisition module and a fill light module can be fixedly mounted on the mounting frame. The image acquisition module can capture and obtain sample images of paint samples passing on the sliding block beneath the mounting frame. The fill light module can supplement the captured paint samples with light, thereby ensuring the authenticity of the sample images and preventing image distortion.

[0009] The controller can be installed on the work surface and can also be remotely controlled through the background. The controller can be electrically connected to the rotating drive component, the image acquisition module and the fill light module.

[0010] Preferably, a sliding groove is provided on the upper surface of the work surface. The sliding groove may be a long strip structure or a vertical through-structure. The sliding block is placed in the sliding groove and can slide linearly in the sliding groove. The loading position, detection position, and unloading position are located at the end and middle of the sliding groove.

[0011] Preferably: the cross-section of the sliding groove can be set to a T-shaped structure, the cross-section of the sliding block can also be set to a T-shaped structure, and the bottom of the upper side edge of the sliding block can be rotatably provided with a ball, and the ball can roll along the edge of the sliding groove, thereby reducing the sliding friction of the sliding block and making it slide smoothly.

[0012] Preferably, the sliding drive member may further include a rotating drive member and a screw, the screw being rotatably disposed on the work surface, the screw being located within the sliding groove and aligned with the sliding direction of the sliding block. The rotating drive member is connected to the screw to drive the screw to rotate, and the sliding block may be fitted and nested on the screw.

[0013] Preferably: the rotating drive member may include a motor, a pulley and a belt. The motor may be a three-phase motor. The motor may be mounted on a work surface. The output shaft of the motor is coaxially fixedly connected to the pulley. One end of the screw rod extends out of the work surface and is also coaxially fixed with the pulley. The two pulleys are connected by a belt drive. The paint sample can be placed on the upper material position sliding block. The rotating drive member can drive the screw rod to rotate, and the sliding block slides on the work surface, thereby completing the transmission of the paint sample.

[0014] Preferably, the sliding block may include a block body, a cavity groove, and a clamping block. The block body is the main structure of the sliding block. The cavity groove may be a rectangular structure that extends from top to bottom. The clamping block is placed inside the cavity groove. The clamping block is fitted onto a screw rod. The screw rod rotates to drive the clamping block to move. The block body has a cylindrical through hole. The screw rod rotates and slides through the through hole. When the screw rod rotates, it drives the clamping block to move inside the cavity groove. When the clamping block moves to the end of the cavity groove, the continued movement of the clamping block pushes the block body to move, thereby completing the movement of the sliding block.

[0015] Preferably, the block is fixedly provided with an end push rod on its upper surface. The clamping block moves toward the end push rod, and the clamping block and the end push rod cooperate to clamp the paint swatch, thereby completing the clamping and fixing of the paint swatch. The clamping block cannot move relative to the end push rod, and can promote the movement of the entire sliding block and the paint sample thereon, thereby completing the fixing and transportation of the paint swatch. The clamping block and the end push rod can achieve the fixed clamping and longitudinal position restriction of the paint swatch, in order to limit the paint swatch laterally and ensure its detection and positioning.

[0016] Preferably: a side baffle is fixedly provided on one side of the upper surface of the block, and the side baffle can laterally limit one side of the paint swatch, and a positioning rod is fixedly provided on the top of one end of the clamping block relative to the side baffle. When the clamping block moves inside the cavity groove, the thrust of the inclined surface of the positioning rod can push the paint swatch toward the end push rod and the side baffle, and the position of the paint swatch can be limited by the end push rod and the side baffle.

[0017] Preferably: a position sensor is provided on the mounting frame, and the position of the sliding block can be detected by the position sensor. When the sliding block reaches the detection position, the position sensor can sense that the sliding block has entered the detection position, and the image acquisition module starts to shoot the paint sample on the sliding block to obtain a sample picture.

[0018] Preferably, light-shielding doors are provided on both sides of the mounting frame, and the light-shielding doors can shield the space inside the mounting frame from light, thereby preventing external light from interfering with the shooting of the picture acquisition module.

[0019] Preferably, the mounting frame is rotatably connected to the light-shielding doors provided on both sides, and the sliding block and the light-shielding door can be synchronously driven by a transmission drive member so that the light-shielding door completes the switch state conversion as the sliding block moves, thereby realizing the synchronous switch of the light-shielding door.

[0020] Preferably: the transmission drive member may include a disk body and a driving protrusion, the driving protrusion may be fixed on the side of the sliding block in a linear array, the driving protrusion may be a cylindrical structure or a toothed structure, the disk body is rotatably set on the mounting frame, and a plurality of force-bearing protrusions are fixedly set on the circumference of the side facing the sliding block, and the force-bearing protrusions are engaged and matched with the driving protrusions. A lifting rod is fixedly set on the disk body. When the sliding block moves close to the mounting frame, the driving protrusion contacts the side of the rotating drive member, the driving protrusion engages with the force-bearing protrusion, and the movement of the sliding block can push the disk body to rotate. Initially, the lifting rod is in a vertical position. As the sliding block drives the disk body to rotate, the lifting rod rotates downward and contacts the inner wall of the light-shielding door. The lifting rod can push the light-shielding door open, thereby facilitating the sliding block to enter the interior of the mounting frame. When the sliding block enters the detection position below the mounting frame, the lifting rod rotates to the bottom of the disk body and disengages from the light-shielding door. At this point, the image acquisition module can capture the paint swatch on the slider. The slider continues to move, driving the disc to rotate. The lifter contacts the other side of the light-shielding door and pushes it open. This facilitates the movement of the slider and the paint swatch on its upper surface out of the mounting bracket. Transmission is provided by a drive element, facilitating the opening and closing of the light-shielding door. This eliminates the need for manual operation or the installation of a separate drive device. The light-shielding door's opening and closing is synchronized with the slider's movement, achieving an organic opening and closing motion. This ensures consistency between the moving and operating states, resulting in a simple structure, avoiding redundant drive structures, reducing equipment costs, and conserving energy.

[0021] Preferably, a rotating ball is rotatably provided at the end of the lift rod, and the provision of the rotating ball can reduce the friction between the lift rod and the light-shielding door, thereby making the light-shielding door open and close smoothly.

[0022] Preferably, a discharge chute may be provided on the work surface. The discharge chute is in the discharge position, and the discharge chute penetrates the upper surface of the work surface. A notch is provided on the other side of the sliding groove at a position corresponding to the position of the discharge chute, and the notch provides a rotation space for the sliding block. When the screw drives the sliding block to enter the discharge position, the rotary drive member drives the screw to rotate in the opposite direction. At this time, the sliding block is in the discharge chute position. The screw rotates in the opposite direction, and the deflection force applied to the sliding block loses support from the side wall of the work surface. The sliding block is overturned by the deflection force and is blocked by the bottom of the discharge chute. At this time, the sliding block is tilted in the discharge position, driving the clamping block to move in the opposite direction inside the cavity, thereby releasing the paint swatch on the sliding block. The paint swatch slides from the sliding block under gravity into the interior of the discharge chute.

[0023] Preferably, a discharge channel may be provided on the side wall of the discharge chute, and a collection box may be provided below the discharge channel. Paint samples falling into the discharge chute may be discharged through the discharge channel for collection.

[0024] Preferably, the discharge chute may include a slope and a transverse slope, the slope and the transverse slope being smoothly connected, the transverse slope being at the bottom of the slope, and the discharge channel being connected to the transverse slope of the discharge chute. As the screw continues to rotate in the opposite direction, the side wall of the sliding block contacts the transverse slope of the discharge chute. Under the action of the slope of the discharge chute, its inclined surface guides the sliding block. As the sliding block slides in the opposite direction, the sliding block rotates in the opposite direction on the screw, causing its upper surface to face upward again and pass through the mounting bracket to return to the loading position. In order to reduce friction, a ball bearing may be provided at the corresponding position of the sliding block, the details of which are not described here. By cooperating with the discharge chute and the screw, according to the rotatable transmission characteristics of the screw, and by the arrangement of the slope structure and the clamping block, reverse transmission, unlocking, gravity unloading, and rotational reset are achieved, achieving an organic structural combination and sequential linkage, and the sequential operation of the linkage structure is completely consistent with the operation sequence of the paint sample, achieving an organic sequential linkage operation, without the need for multiple drive structures, simplifying the structure, and not easily causing operation errors due to drive control failures, thereby ensuring the accuracy of the operation.

[0025] Preferably, the method for obtaining the sample picture may include: the picture acquisition module photographs the sliding block and the paint sample thereon to obtain a picture. The picture is placed in a plane coordinate system, and the horizontal and vertical coordinates of the plane coordinate system can be the horizontal and vertical length values. Then, the picture is processed to obtain the grayscale value in the picture, the grayscale value difference in the edge direction is calculated, and the grayscale value difference in the detection area is obtained from the grayscale value difference. Because the paint sample is positioned and placed, the placement position and the shooting position of the picture acquisition module are relatively fixed, and the paint sample shooting position is generally fixed. However, simply determining the sample picture based on the placement position is very prone to errors due to the possibility of errors in the sample of the paint sample. Determination by the grayscale value difference in the detection area is more accurate, avoiding unilateral errors causing sample picture extraction errors. The coordinates whose grayscale value difference is greater than a preset standard deviation are calibrated, and the calibrated coordinate points are connected in pairs to form multiple connecting lines. These connecting lines are then counted to obtain the overlapping lines of each connecting line. Then, the two overlapping lines with the largest number of connecting lines in each edge direction are obtained, and these overlapping lines are used as edge lines to form a sample picture of the edge lines.

[0026] Preferably, the controller analyzes the sample image by processing the sample image to obtain the gray value g of each sampling point. i , where i is the number of the sampling point in the sample picture, and the corrosion value of each paint sample is calculated Where i is the number of the sampling point in the sample picture, I is the total number of sampling points in the sample picture, i=1, 2, ..., I. i is the grayscale value of the sampling point numbered i in the sample image, g0 is the grayscale value of the uncorroded paint sample image, Δg is the standard grayscale value difference, and S0 is the evaluation area of ​​the sampling point. Using this calculation and determination method, the corrosion depth can be estimated based on the grayscale value difference in the image. Since the difference in corrosion depth decreases with increasing corrosion depth, correction using the exponent can highlight the sampling points with the highest corrosion depth, thus completing the corrosion evaluation of each sampling point with accuracy. This method not only evaluates the corrosion area but also the corrosion depth, making the evaluation more objective and avoiding the biased evaluation caused by unilateral evaluation.

[0027] Preferred: Evaluation area Among them S 总 is the total area of ​​the sample image, which can be measured on the paint sample, and I is the total number of sampling points in the sample image.

[0028] The technical effects and advantages of the present invention include: paint samples can be transferred via a sliding block, and the image acquisition module is fixedly installed, making detection convenient and enabling automatic feeding, with a high degree of automation. Capturing and analyzing the images through the image acquisition module avoids the subjectivity caused by manual statistics, resulting in rapid detection and accurate statistics. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the three-dimensional structure of a coating corrosion detection device proposed by the present invention.

[0030] Figure 2 This is a schematic diagram of the top view of a corrosion detection device for coatings proposed by the present invention.

[0031] Figure 3 for Figure 2 Schematic diagram of the partial cross-sectional structure of the AA section.

[0032] Figure 4 for Figure 2 Schematic diagram of the partial cross-sectional structure of the middle BB section.

[0033] Figure 5 This is a schematic diagram of the three-dimensional structure of a transmission drive disc in a paint corrosion detection device proposed by the present invention.

[0034] Explanation of the reference numerals: work surface 1, sliding block 2, clamping block 3, mounting bracket 4, light-shielding door 5, screw 6, driving protrusion 7, rotating driving member 8, end push rod 9, side blocking rod 10, cavity groove 11, unloading chute 12, discharge channel 13, picture acquisition module 14, fill light module 15, transmission driving member 16, lifting rod 17, disk body 18, force-bearing protrusion 19, rotating ball 20. DETAILED DESCRIPTION

[0035] The following describes in detail embodiments of the present disclosure, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present disclosure and are not to be construed as limiting the present disclosure. On the contrary, the embodiments of the present disclosure include all variations, modifications, and equivalents that fall within the spirit and scope of the appended claims.

[0036] Example 1

[0037] refer to Figures 1-4 In this embodiment, a coating corrosion detection device is proposed for detecting a corroded coating sample and evaluating the corrosion results. The coating corrosion detection device may include:

[0038] The work surface 1 can be a rectangular plate structure or a welded steel frame structure. The bottom of the work surface 1 can be provided with support legs to support the work surface 1, thereby ensuring that the work surface 1 has a certain support height. By fixing the support legs to the ground, the support stability of the work surface 1 is increased. The upper surface of the work surface 1 is provided with a sliding groove. The sliding groove can be a long strip structure to ensure that the sliding groove has a certain length. The sliding groove can be a through-type structure, although non-through-type structures are not excluded. The provision of a through-type structure can reduce the thickness of the work surface 1, thereby reducing the size and weight of the equipment. The details are not described here. The work surface 1 can be provided with a loading position, a detection position, and a unloading position. The loading position, detection position, and unloading position are located at the ends and the middle of the sliding groove. A sliding block 2 is slidably placed on the work surface 1. The sliding block 2 can be placed in the sliding groove and can slide freely within the sliding groove, thereby switching between the loading position, detection position, and unloading position. The cross-section of the sliding groove can be configured as a T-shaped structure, and the cross-section of the sliding block 2 can also be configured as a T-shaped structure. A ball bearing can be rotatably provided at the bottom of the upper side edge of the sliding block 2. The ball bearing can roll along the edge of the sliding groove, thereby reducing the sliding friction of the sliding block 2 and making it slide smoothly. The placement of the paint swatches can be manual or robotic, depending on the actual situation, and will not be detailed here.

[0039] The sliding drive member can be installed on the work surface 1 and connected to the sliding block 2, and is used to drive the sliding block 2 to slide linearly on the work surface 1. The sliding drive member can be a hydraulic rod, an electric telescopic rod or a pneumatic rod, etc. Of course, the sliding drive member can also include a rotating drive member 8 and a screw rod 6. The screw rod 6 is rotatably arranged on the work surface 1 and can be located inside the sliding groove and consistent with the sliding direction of the sliding block 2. The rotating drive member 8 is connected to the screw rod 6 and is used to drive the screw rod 6 to rotate. The sliding block 2 can be nested in the screw rod 6. If the screw rod 6 is a threaded screw rod, a cylindrical through hole is provided inside the sliding block 2, and a thread is provided in the through hole and is nested in the screw rod 6. If the screw rod 6 is a spiral groove screw rod, a cylindrical through hole is provided inside the sliding block 2, and a ball is rotatably arranged in the through hole. The through hole is nested in the screw rod 6, and the ball is nested in the spiral groove. The details are not repeated here. The rotating drive member 8 may include a motor, a pulley, and a belt. The motor may be a three-phase motor that can be mounted on the work surface 1. The motor output shaft is coaxially fixedly connected to the pulley. One end of the screw rod 6 extends out of the work surface 1 and is also coaxially fixed to the pulley. The two pulleys are connected by a belt drive to transmit the paint. Of course, a gear combination can also be used. The details are not described here. To increase safety, a mounting housing can also be installed on the work surface 1. The mounting housing can cover the pulley and belt, thereby increasing its safety. The specific structure of the mounting housing is not described here. When loading, the paint sample can be placed on the loading position slide block 2. The rotating drive member 8 can drive the screw rod 6 to rotate, and the slide block 2 slides on the work surface 1, thereby completing the transfer of the paint sample.

[0040] The sliding block 2 can include: a block body, a cavity groove 11 and a clamping block 3. The block body is the main structure of the sliding block 2. The cavity groove 11 can be provided on the block body. The cavity groove 11 can be a rectangular upper and lower through-structure. The clamping block 3 is placed inside the cavity groove 11. The clamping block 3 is fitted on the screw rod 6. The screw rod 6 rotates to drive the clamping block 3 to move. The block body has a cylindrical through hole. The screw rod 6 can rotate and slide through the through hole. When the screw rod 6 rotates, the clamping block 3 can be driven to move inside the cavity groove 11. When the clamping block 3 moves to the end of the cavity groove 11, the clamping block 3 continues to move to push the block body to move, thereby completing the movement of the sliding block 2. The upper surface of the block body is fixedly provided with an end push rod 9. The clamping block 3 moves close to the end push rod 9. The clamping block 3 and the end push rod 9 cooperate to clamp the paint sample, thereby completing the clamping and fixing of the paint sample. The clamping block 3 cannot move relative to the end push rod 9, but can push the entire sliding block 2 and the paint sample thereon to move, and complete the fixation and transportation of the paint sample. The clamping block 3 and the end push rod 9 can complete the fixed clamping and longitudinal position restriction of the paint sample. In order to restrict the paint sample laterally and ensure its detection and positioning, a side baffle 10 is fixedly provided on one side of the upper surface of the block. The side baffle 10 can laterally restrict one side of the paint sample. A positioning rod is fixedly provided at one end of the clamping block 3 relative to the side baffle 10. When the clamping block 3 moves inside the cavity groove 11, the thrust of the inclined surface of the positioning rod can push the paint sample toward the end push rod 9 and the side baffle 10. The restriction by the end push rod 9 and the side baffle 10 can complete the position restriction of the paint sample.

[0041] The work surface 1 is fixedly provided with a mounting frame 4. The mounting frame 4 may be a gantry structure, with both ends of the mounting frame 4 bolted to the work surface 1. The sliding block 2 can be transported under the mounting frame 4. The mounting frame 4 may be fixedly provided with an image acquisition module 14 and a fill light module 15. The image acquisition module 14 can capture a paint sample on the sliding block 2 passing under the mounting frame 4 and obtain a sample image. Specifically, the mounting frame 4 may be provided with a position sensor that can detect the position of the sliding block 2. When the sliding block 2 reaches a detection position, the position sensor can sense that the sliding block 2 has entered the detection position, and the image acquisition module 14 activates to capture the paint sample on the sliding block 2 and obtain a sample image. The position sensor may be an infrared sensor or a photosensor, the details of which are not described here. The fill light module 15 can supplement the light of the captured paint sample to ensure the authenticity of the sample image and avoid image distortion. The image acquisition module 14 and the fill light module 15 are conventional technology, and the details are not described here.

[0042] Light-shielding doors 5 are rotatably provided on both sides of the mounting frame 4. The light-shielding doors 5 can shield the space inside the mounting frame 4, thereby preventing external light from interfering with the shooting of the image acquisition module 14. In order to increase the airtightness of the light-shielding door 5, there are certain requirements for the height of the bottom of the light-shielding door 5, which will hinder the entry of the sliding block 2. When entering, the light-shielding door 5 needs to be opened. The light-shielding door 5 can be opened by rotating it upward, so that the sliding block 2 and the paint sample thereon can enter the detection position. Closing the light-shielding door 5 can prevent light from entering the detection position. The sliding block 2 continues to move to open the light-shielding door 5 on the other side for easy removal. The light-shielding door 5 can be driven on and off by a hydraulic rod or other means. Of course, the sliding block 2 and the light-shielding door 5 can also be transmitted through a transmission drive 16, so that the light-shielding door 5 can be opened and closed as the sliding block 2 moves through the transmission drive 16, thereby realizing the synchronous opening and closing of the light-shielding door 5. Reference Figure 5The transmission drive member 16 may include a disc 18 and a drive protrusion 7. The drive protrusion 7 may be fixed to the side of the sliding block 2 in a linear array. The drive protrusion 7 may have a cylindrical structure or a tooth-like structure. The disc 18 is rotatably mounted on the mounting frame 4. A plurality of force-bearing protrusions 19 are fixedly mounted on the circumference of the side facing the sliding block 2. The force-bearing protrusions 19 engage with the drive protrusions 7. A lifting rod 17 is fixedly mounted on the disc 18. When the sliding block 2 moves closer to the mounting frame 4, the drive protrusion 7 contacts the side of the rotating drive member 8, and the drive protrusion 7 engages with the force-bearing protrusion 19. The movement of the sliding block 2 can drive the disc 18 to rotate. Initially, lift rod 17 is in a vertical position. As slider 2 drives disk 18 to rotate, lift rod 17 rotates downward and contacts the inner wall of light-shielding door 5. Lift rod 17 can push light-shielding door 5 open, thereby facilitating the entry of slider 2 into mounting frame 4. When slider 2 enters the detection position below mounting frame 4, lift rod 17 rotates below disk 18 and disengages from light-shielding door 5. At this point, image acquisition module 14 can capture the paint swatch on slider 2. Slider 2 continues to move, driving disk 18 to rotate, and lift rod 17 contacts light-shielding door 5 on the other side, pushing it open. This facilitates the removal of slider 2 and the paint swatch on its upper surface from the range of mounting frame 4. The transmission is carried out through the transmission drive 16, thereby facilitating the opening and closing of the light-shielding door 5, without the need for manual switching or installation of an additional driving device, and making the opening and closing of the light-shielding door 5 consistent with the moving state of the sliding block 2, realizing the organic opening and closing action of the door, and realizing the consistency of the moving state, the operating state and the switching state, thereby making the structure simple, avoiding the redundancy of the driving structure, reducing the equipment cost, and saving energy. The end of the lifting rod 17 can be rotatably provided with a rotating ball 20, and the setting of the rotating ball 20 can reduce the friction between the lifting rod 17 and the light-shielding door 5, so that the light-shielding door 5 can be opened and closed smoothly. A discharge chute 12 can also be provided on the work surface 1, and the discharge chute 12 is at the unloading position. The discharge chute 12 passes through the upper surface of the work surface 1, and a gap is provided on the other side of the sliding groove at a position corresponding to the position of the discharge chute 12, and the gap provides a rotation space for the sliding block 2. When the screw rod 6 drives the sliding block 2 to enter the unloading position, the rotating driving member 8 drives the screw rod 6 to rotate in the opposite direction. At this time, the sliding block 2 is in the position of the unloading chute 12, and the screw rod 6 rotates in the opposite direction. The deflection force applied to the sliding block 2 loses the support of the side wall of the work table 1. The sliding block 2 is flipped over by the deflection force and is blocked by the bottom of the unloading chute 12. At this time, the sliding block 2 is tilted and in the unloading position, driving the clamping block 3 to move in the opposite direction inside the cavity groove 11, thereby releasing the paint swatch on the sliding block 2. The paint swatch slides from the sliding block 2 into the inside of the unloading chute 12 due to gravity. A discharge channel 13 can be provided on the side wall of the unloading chute 12, and a collection box can be provided under the discharge channel 13. The paint swatches that fall into the unloading chute 12 can be discharged through the discharge channel 13 for collection.The discharge chute 12 may comprise a slope and a transverse slope, which are smoothly connected. The transverse slope is at the bottom of the slope, and the discharge channel 13 is connected to the transverse slope of the discharge chute 12. As the screw rod 6 continues to rotate in the opposite direction, the side wall of the sliding block 2 contacts the transverse slope of the discharge chute 12. Under the action of the slope of the discharge chute 12, its inclined surface guides the sliding block 2. As the sliding block 2 slides in the opposite direction, it rotates in the opposite direction on the screw rod 6, causing its upper surface to pass upward through the mounting bracket 4 and return to the loading position. To reduce friction, ball bearings may be provided at corresponding positions on the sliding block, though details are not detailed here. By cooperating with the unloading chute 12 and the screw rod 6, according to the rotatable transmission characteristics of the screw rod 6, and through the arrangement of the slope structure and the clamping block 3, reverse transmission, unlocking, gravity unloading, and rotational reset are realized, achieving organic combination and sequential linkage, and the sequential operation of the linkage structure is completely consistent with the operation sequence of the paint sample, realizing organic sequential linkage operation, without the need for multiple drive structures to drive, simplifying the structure, and not easily causing operation errors due to drive control failures, thereby ensuring the accuracy of the operation.

[0043] The controller can be installed on the work surface 1, and can also be controlled remotely from the background. The controller can be electrically connected to the rotating drive member 8, the position sensor, the image acquisition module 14 and the fill light module 15. The controller can control the rotation speed and driving direction of the rotating drive member 8. Initially, the sliding block 2 can be in the loading position, and the paint swatch is placed on the sliding block 2, specifically on the block. The rotating drive member 8 is started by the controller, and the rotating drive member 8 drives the screw 6 to rotate in the forward direction. The clamping block 3 moves relatively inside the cavity groove 11. The clamping block 3 contacts one end of the paint swatch. Under the thrust of the inclined surface of the positioning rod on the clamping block 3, the paint swatch can be pushed toward the end push rod 9 and the side baffle 10. By limiting the end push rod 9 and the side baffle 10, the position limitation of the paint swatch can be completed, and the positioning placement and locking are realized. The clamping block 3 pushes the sliding block 2 and the paint sample thereon to move closer to the mounting frame 4, and the driving protrusion 7 contacts and engages with the force-bearing protrusion 19. As the sliding block 2 drives the disk 18 to rotate, the lifting rod 17 rotates downward and contacts the inner wall of the light-shielding door 5. The lifting rod 17 pushes the light-shielding door 5 open, thereby facilitating the sliding block 2 to enter the interior of the mounting frame 4. When the sliding block 2 and the paint sample thereon enter the detection position below the mounting frame 4, the lifting rod 17 rotates to the bottom of the disk 18 and disengages from the light-shielding door 5. The position sensor senses that the sliding block 2 has entered the detection position. The position sensor sends a sensing signal to the controller, which controls the image acquisition module 14 to start taking a picture of the paint sample on the sliding block 2 to obtain a sample picture. Of course, manual control can also be used. For example, when the paint sample is observed to have entered the detection position, the controller manually turns off the driving member 8 and then controls the image acquisition module 14 to take a picture of the paint sample. The details are not repeated here. The sliding block 2 continues to move, driving the disc 18 to rotate. The lifting rod 17 contacts the light-shielding door 5 on the other side and pushes it open, thereby facilitating the sliding block 2 and its upper surface to move out of the range of the mounting frame 4. The sliding block 2 continues to move into the unloading position. The controller controls the rotary drive member 8 to drive the screw 6 to rotate in the opposite direction. The control can be manual or a contact sensor can be provided at the end of the sliding groove. When the contact sensor senses that the sliding block 2 is in place at the unloading position, the controller controls the rotary drive member 8 to drive in the opposite direction. The details are not detailed here. At this time, the sliding block 2 is in the position of the unloading chute 12, and the screw 6 rotates in the opposite direction. The deflection force on the sliding block 2 loses the support of the side wall of the work surface 1. The sliding block 2 is flipped over by the deflection force, and its side wall is blocked by the bottom of the unloading chute 12. At this time, the sliding block 2 is tilted in the unloading position, and the clamping block 3 moves in the opposite direction inside the cavity groove 11, thereby releasing the paint swatch on the sliding block 2. The paint swatch slides from the sliding block 2 into the inside of the unloading chute 12 due to gravity. The paint swatches falling into the unloading chute 12 can be discharged through the discharge channel 13 for collection.The side wall of the sliding block 2 contacts the bottom of the discharge chute 12, and the sliding block 2 is guided by the slope of the discharge chute 12. As the sliding block 2 slides in the opposite direction, the sliding block 2 rotates in the opposite direction on the screw 6, so that its upper surface passes through the mounting bracket 4 upward again and returns to the loading position. The controller obtains a sample picture. The method for obtaining the sample picture may include: the picture acquisition module 14 takes a picture of the sliding block 2 and the paint sample thereon to obtain a picture. In order to facilitate the analysis of the picture, the upper surface of the sliding block 2 can be set to a color that is significantly different from the grayscale value of the paint sample color. The specific color can be determined according to the actual color of the paint sample to be detected, generally black. The photo is placed in a plane coordinate system. The horizontal and vertical coordinates of the plane coordinate system can be the horizontal and vertical length values. The specific details are not repeated here. Then the picture is processed to obtain the grayscale value in the photo, and the grayscale value difference in the edge direction is calculated. The edge direction here can be horizontal and vertical, and of course other directions are not excluded. The grayscale value difference within the detection area is obtained from the grayscale value difference. Because the paint swatch is positioned and placed, the placement position and the shooting position of the image acquisition module 14 are relatively fixed. The paint swatch shooting position is generally fixed. However, simply determining the swatch image by the placement position is very easy to cause errors due to the possible errors in the sample of the paint swatch. Determining it by the grayscale value difference within the detection area is more accurate, avoiding unilateral errors causing sample image extraction errors. The coordinates whose grayscale value difference is greater than a preset standard deviation are calibrated. The preset standard deviation can be determined according to actual conditions. The general value is 10-100, and the specific details are not repeated here. The calibrated coordinate points are connected in pairs to form a plurality of connecting lines, and then these connecting lines are counted to obtain the overlapping lines of each connecting line. In theory, each connecting line should be on the same overlapping line. There is at least one connecting line on the actual overlapping line. Then, the two overlapping lines with the largest number of connecting lines in each edge direction are obtained. Since there are two edge directions, For example, horizontally and vertically, the number of overlapping lines obtained is 4, and these overlapping lines are used as edge lines to form a sample image. After obtaining the sample image, the sample image is processed to obtain the grayscale value g of each sampling point. i , where i is the number of the sampling point in the sample image. The acquisition of the sampling point can be set according to actual needs. Generally, a preset pixel value can be set based on the edge line and its spacing. For example, the spacing between two sampling points is 10 pixels. Other specific situations are not described here. Then calculate the corrosion value of each paint sample Where i is the number of the sampling point in the sample picture, I is the total number of sampling points in the sample picture, i=1, 2, ..., I. iis the grayscale value of the sampling point numbered i in the sample image, g0 is the grayscale value of the paint sample before corrosion, which can be obtained by testing the uncorroded paint sample and obtaining the average value. The details are not repeated here. Δg is the standard grayscale value difference, and its value can be determined according to the performance of the image acquisition module 14 or the color of the paint. The specific value can be 10-100, which can be obtained in advance based on experiments. The specific details are not repeated here. S0 is the evaluation area of ​​the sampling point. In general, the sampling points can be evenly set. Specifically, it can be the evaluation area. Among them S 总 is the total area of ​​the sample picture, which can be measured for the paint sample, and I is the total number of sampling points in the sample picture, which will not be described in detail here. By using this method for calculation and judgment, the corrosion depth can be estimated based on the grayscale value difference of the picture. Since the difference in the corrosion depth becomes smaller as the corrosion depth increases, the sampling points of the corrosion depth can be highlighted by correction through the index, so that the corrosion evaluation of each sampling point can be completed and the evaluation is accurate. By using this method, not only the corrosion area is evaluated, but also the corrosion depth is evaluated, which makes the evaluation more objective and avoids the one-sided evaluation caused by unilateral evaluation. The corrosion level is obtained by comparing the corrosion value with the pre-set corrosion level range. The corrosion level range can be prepared in advance according to the actual situation, which will not be described in detail here. Of course, it can also be directly evaluated by the size of the corrosion value, which will not be described in detail here. Of course, it can also be directly evaluated according to the corrosion area, and the specific evaluation is |g i -g0| The coordinate points that are greater than a preset standard deviation value are marked, and the number of marked coordinate points N is counted. The total corrosion area is calculated as NS0, and then the corrosion level is obtained by comparing the area range level. The details are not described here.

[0044] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this disclosure can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions disclosed in this disclosure can be achieved. This is not a limitation herein.

[0045] The above specific embodiments do not constitute a limitation on the scope of protection of this disclosure. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure shall be included within the scope of protection of this disclosure.

Claims

1. A coating corrosion detection device, characterized in that: The coating corrosion detection device comprises: A work surface (1) is provided with a loading position, a detection position, and a unloading position; a sliding block (2) is slidably placed on the work surface (1); A sliding drive member is installed on the work surface (1) and connected to the sliding block (2), and is used to drive the sliding block (2) to slide on the work surface (1); A mounting frame (4) is fixedly provided on the work surface (1); a picture acquisition module (14) for photographing paint samples passing below the mounting frame and obtaining sample pictures, and a light-filling module (15) for filling in light for the photographed paint samples are fixedly installed on the mounting frame (4); The controller is mounted on the work surface (1) and is electrically connected to the rotating drive member (8), the image acquisition module (14) and the fill light module (15).

2. A coating corrosion detection device according to claim 1, characterized in that: The upper surface of the work table (1) is provided with a sliding groove, and the sliding block (2) is placed in the sliding groove.

3. A coating corrosion detection device according to claim 2, characterized in that: The cross section of the sliding groove is set to a T-shaped structure, and the cross section of the sliding block (2) is also set to a T-shaped structure. A ball is rotatably provided at the bottom of the upper side edge of the sliding block (2), and the ball is used to roll along the edge of the sliding groove.

4. A coating corrosion detection device according to claim 1, characterized in that: The sliding drive member comprises a rotating drive member (8) and a screw rod (6), wherein the screw rod (6) is rotatably arranged on the work surface (1), the screw rod (6) is located inside the sliding groove and is consistent with the sliding direction of the sliding block (2); The rotating driving member (8) is connected to the screw rod (6), and the rotating driving member (8) is used to drive the screw rod (6) to rotate. The sliding block (2) is nested in the screw rod (6).

5. A coating corrosion detection device according to claim 4, characterized in that: The sliding block (2) comprises: a block body, a cavity groove (11) and a clamping block (3); the block body is the main structure of the sliding block (2); the cavity groove (11) is provided on the block body; the clamping block (3) is placed inside the cavity groove (11); the clamping block (3) is fitted on the screw rod (6); and the screw rod (6) can rotate and slide through the block body.

6. A coating corrosion detection device according to claim 1, characterized in that: Light-shielding doors (5) for shielding the space inside the mounting frame (4) are provided on both sides of the mounting frame (4); the mounting frame (4) is rotatably connected to the light-shielding doors (5) provided on both sides, and the sliding block (2) and the light-shielding door (5) are synchronously driven by a transmission drive member (16) so that the light-shielding door (5) moves with the sliding block (2) to complete the switch state conversion.

7. A coating corrosion detection device according to claim 6, characterized in that: The transmission drive member (16) comprises: a disk body (18) and a driving protrusion (7), wherein the driving protrusion (7) is fixed in a linear array on the side of the sliding block (2), and the disk body (18) is rotatably arranged on the mounting frame (4), and a plurality of force-bearing protrusions (19) are fixedly arranged on the circumference of a side facing the sliding block (2), and the force-bearing protrusions (19) are engaged and matched with the driving protrusion (7); and a lifting rod (17) is fixedly arranged on the disk body (18).

8. A coating corrosion detection device according to claim 4, characterized in that: A discharge chute (12) is provided on the work surface (1), the discharge chute (12) is at a discharge position, the discharge chute (12) penetrates the upper surface of the work surface (1), and a notch is provided on the other side of the sliding groove at a position corresponding to the position of the discharge chute (12) to provide a rotation space for the sliding block (2).

9. A coating corrosion detection device according to claim 8, characterized in that: A discharge channel (13) is provided on the side wall of the discharge chute (12).

10. The coating corrosion detection device according to claim 8, characterized in that: The discharge chute (12) comprises a slope and a transverse slope, the slope and the transverse slope are smoothly connected, and the transverse slope is at the bottom of the slope.

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