An AI visual inspection device for magnetic particle inspection

Abstract

The present invention relates to the technical field of magnetic particle flaw detection, and in particular to an AI visual inspection device for magnetic particle flaw detection, comprising: a material sorting mechanism and a workpiece to be inspected, a magnetizing feeding assembly, a detection assembly, and an AI processing unit. The AI ​​processing unit performs judgment and sorting based on images from multiple stations and angles. A multi-station camera group is provided that can perform 360-degree image acquisition without blind spots. By sorting the workpieces to be inspected, magnetizing and spraying multiple workpieces simultaneously, the efficiency of visual inspection is improved. The AI ​​processing unit performs recording, analysis, and judgment, thereby improving inspection production efficiency and accuracy while reducing human errors. A steering wheel is used to rotate the workpiece to be inspected during spraying, making the spraying more uniform and eliminating spraying blind spots caused by clamping. Automatic monitoring, replacement, and replenishment of a magnetic powder liquid storage barrel are achieved, and the AI ​​processing unit continuously corrects and improves the inspection accuracy, thereby performing assembly-line magnetic particle flaw detection and improving inspection efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic particle flaw detection, and in particular to an AI visual detection device for magnetic particle flaw detection. Background Art

[0002] Magnetic particle testing utilizes the interaction between the leakage magnetic field at the defects of the workpiece and the magnetic powder. It utilizes the difference in magnetic permeability between the surface and near-surface defects (such as cracks, slag inclusions, hairline, etc.) of steel products and the magnetic permeability of the object to be tested. The workpiece to be tested (steel product) is placed in a strong magnetic field or a large current is passed through it to magnetize it. After magnetization, the magnetic field at the discontinuity of these materials will be distorted, and a leakage magnetic field will be generated on the surface of the workpiece where some magnetic flux leaks. When magnetic powder with good magnetic conductivity (usually magnetic iron oxide powder) is applied to the object, the leakage magnetic field near the defect will attract the magnetic powder, accumulating to form visible magnetic powder traces. Under appropriate lighting conditions, the position and shape of the defect are revealed. The accumulation of these magnetic powders can be observed and interpreted to achieve magnetic particle testing.

[0003] However, at present, the main method for detecting these defects of magnetic powder accumulation is through naked eye inspection by inspectors, which depends largely on the operator's experience and sense of responsibility. It is easy to have errors or omissions in inspection, which will bury hidden dangers to product quality. At the same time, the inspection accuracy and efficiency are relatively low, and the labor cost is high. In addition, in the fluorescent magnetic particle inspection scenario, in order to fully exert the fluorescent effect, the ultraviolet intensity is required to be no less than 800μW / cm in the darkroom environment. 2 Inspection is carried out in an environment that is not friendly to the inspectors and they are prone to visual fatigue. In addition, the range that can be detected at one time during manual inspection of workpieces is relatively small, and multiple inspections are required to inspect a workpiece, which also leads to a slow inspection speed.

[0004] Some existing technologies use automated equipment for magnetic particle inspection, but magnetic particle visual inspection requires high camera exposure to capture clear images. Currently, existing visual inspection equipment uses slow rotation of the workpiece, resulting in low overall inspection efficiency. In addition, existing equipment can only use single workpiece spray inspection, which is slow and cannot achieve assembly line inspection while ensuring inspection accuracy. At the same time, when the magnetic powder spray liquid is sprayed on the workpiece, it is difficult to achieve uniform coverage of every part. The residual magnetic powder on the surface of the workpiece has a large interference, which makes it easy to mistakenly detect qualified parts as unqualified parts.

[0005] A Chinese patent application, CN113406190A, discloses a dual-station fluorescent magnetic particle inspection machine specifically designed for pin-shaped parts. The machine comprises a frame, an electrode slide, a transmission mechanism, a feed mechanism, a material removal and demagnetization mechanism, a magnetic suspension spray system, and a UV lamp. The frame is T-shaped, with two electrode slides mounted at either end. The slides are equipped with independent magnetization and observation stations, and a material removal and demagnetization mechanism is located on the sides of the slides. The feed mechanism can store multiple workpieces simultaneously, allowing for automated loading and unloading using a robotic arm, reducing operator workload. The feed mechanism sequentially delivers workpieces to the magnetization, observation, and demagnetization stations throughout the inspection process, allowing each station to operate simultaneously. This significantly improves work efficiency and makes the machine suitable for on-site workpiece inspection and repair production lines.

[0006] However, since the above technical solution still uses manual inspection, the inspection data and process cannot be recorded, resulting in the inability to trace problems. In addition, manual inspection and judgment may have errors, and the accuracy cannot be guaranteed, and the efficiency cannot meet the usage requirements. Summary of the Invention

[0007] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0008] In view of the above problems in the prior art, the present invention is proposed.

[0009] In order to solve the above technical problems, the present invention provides the following technical solutions: a magnetic particle flaw detection AI visual inspection device, comprising a magnetizing feed assembly, wherein the magnetizing feed assembly includes a magnetizing mechanism;

[0010] The magnetizing mechanism is used to magnetize the workpiece to be inspected, and the magnetizing area covers the outer surface of the workpiece to be inspected;

[0011] The detection assembly is provided with two sets on the frame in a front-to-back order, namely an initial inspection mechanism and a re-inspection mechanism;

[0012] The initial inspection mechanism is used to perform a frontal visual inspection on the magnetized workpiece and obtain a first inspection result;

[0013] The re-inspection mechanism is used to perform side visual inspection on the workpiece inspected by the initial inspection mechanism, and generate a second inspection result, and fit the second inspection result with the first inspection result to form a defect result for feedback on the outer surface of the workpiece, and perform grade judgment based on the defect result.

[0014] As a preferred embodiment of the magnetic particle flaw detection AI visual inspection device of the present invention, the magnetizing feeding assembly further comprises a material sorting mechanism, which is used to sort the input workpieces to be inspected and transmit them to the magnetizing mechanism;

[0015] The magnetizing mechanism positions and sorts each of the workpieces to be inspected while spraying, and each workpiece to be inspected enters the initial inspection mechanism and the re-inspection mechanism in turn according to the set order and interval.

[0016] As a preferred solution of the magnetic particle flaw detection AI visual inspection device described in the present invention, the magnetizing mechanism also includes a spraying component, which is used to spray magnetic powder liquid onto the outer surface of the magnetized workpiece to be inspected. When the magnetizing mechanism sprays, it simultaneously drives the workpiece to be inspected to rotate.

[0017] As a preferred solution of the magnetic particle inspection AI visual inspection device described in the present invention, wherein: the detection assembly is set on the frame through a bracket, the detection assembly includes an adjustment structure and a visual structure, the visual structure includes a light source and a mirror group, the light source and the mirror group are respectively arranged on the adjustment structure, and when the mirror group is arranged on the adjustment structure, an over-inspection interval is formed, the light source is used to provide auxiliary light for the mirror group to identify, and when the workpiece to be inspected passes through the inspection interval, the mirror group is assisted by the light source to identify the workpiece to be inspected and generate a detection result.

[0018] As a preferred solution of the magnetic particle flaw detection AI visual inspection device of the present invention, the light source includes a flash light source or a fixed frequency light source, and the lens of the mirror group includes a prism or a lens.

[0019] As a preferred solution of the magnetic particle inspection AI visual inspection device described in the present invention, the mirror group includes a forward mirror group and a side mirror group. The forward mirror group is arranged on the initial inspection mechanism to perform forward visual inspection on the workpiece to be inspected after magnetization spraying. The side mirror group is arranged on the re-inspection mechanism to perform side visual inspection on the workpiece inspected by the initial inspection mechanism.

[0020] As a preferred solution of the magnetic particle inspection AI visual inspection device described in the present invention, a guide is provided between the magnetizing feeding assembly and the inspection assembly, and the guide is used to guide the workpiece to be inspected from the magnetizing feeding assembly into the inspection assembly while maintaining a relative position.

[0021] As a preferred solution of the magnetic particle flaw detection AI visual inspection device described in the present invention, the adjustment structure is movably arranged, and the adjustment structure is used to obtain the type of the workpiece to be inspected and move and adjust it to adjust the angle and height of the forward mirror group and the side mirror group respectively.

[0022] As a preferred solution of the magnetic particle flaw detection AI visual inspection device described in the present invention, a limit component is also provided in the magnetizing mechanism, and the limit component is used to make the workpiece to be inspected rotate when spraying the workpiece to be inspected, and to distribute each workpiece to be inspected at a fixed distance according to the set distance.

[0023] As a preferred solution of the magnetic particle flaw detection AI visual inspection device described in the present invention, the limit components are symmetrically arranged, and the two limit components first position and clamp the workpiece to be inspected when they approach the workpiece to be inspected synchronously, and then cause each workpiece to be inspected to rotate when they continue to approach.

[0024] As a preferred solution of the magnetic particle flaw detection AI visual inspection device described in the present invention, it also includes a control system, which includes an adjustment module and an execution module. The control system obtains the spacing between each workpiece to be inspected output by the magnetized feeding assembly, processes it and outputs a transmission rate adjustment instruction, and the execution module receives the adjustment instruction and adjusts the transmission rate of the workpiece to be inspected, so that adjacent workpieces to be inspected enter the initial inspection mechanism and the re-inspection mechanism in turn.

[0025] As a preferred solution of the magnetic particle inspection AI visual inspection device described in the present invention, the control system also includes an AI processing unit, which is used to fit the first detection result and the second detection result to form a defect result, and is used to locate the defect image position and calculate the defect parameters, and determine the image detection result based on the defect parameters.

[0026] As a preferred embodiment of the magnetic particle inspection AI visual inspection device of the present invention, the control system further includes a conveying control unit, which is used to control the magnetizing mechanism to magnetize and spray the workpieces to be inspected in batches, and sequentially pass the workpieces through the initial inspection mechanism and the re-inspection mechanism for front and side visual inspections;

[0027] It also includes a deviation correction unit, which is used to compare the adjacent distances between each workpiece to be inspected, and adjust the conveying rate to make the process switching time consistent when the distances between adjacent workpieces to be inspected deviate.

[0028] As a preferred embodiment of the AI ​​visual inspection device for magnetic particle inspection of the present invention, the AI ​​processing unit further includes an AI magnetic particle inspection model, the image is identified and the inspection area is found by the AI ​​magnetic particle inspection model, and visual analysis and inspection are performed based on the front image and side image input by the lens group, and the defect area is found by fitting the results.

[0029] The AI ​​processing unit also includes automatic annotation based on the front image and the side image, and calculates the defect parameters, and determines the defect level based on the defect value.

[0030] The beneficial effects of the present invention are as follows: by sorting the workpieces to be inspected, magnetization spraying of multiple workpieces can be carried out at the same time, while maintaining the spacing to facilitate the subsequent plane and side image acquisition, 360° visual inspection, and recording and analysis and judgment through the AI ​​processing unit, thereby improving the inspection production efficiency and accuracy while reducing human errors. The steering wheel allows the workpiece to be inspected to rotate during spraying, the spraying is more uniform, and the spraying dead angle caused by clamping is eliminated. The AI ​​processing unit improves the accuracy of the judgment results of magnetic particle inspection through continuous correction by the operator, thereby performing assembly line magnetic particle inspection and improving inspection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0032] Figure 1 This is an overall schematic diagram of the magnetic particle inspection AI visual inspection device in the present invention.

[0033] Figure 2 It is an enlarged view of the detection assembly in the present invention.

[0034] Figure 3 This is a schematic diagram of the interior of the magnetizing feeding assembly of the present invention.

[0035] Figure 4 It is a structural diagram of the initial inspection mechanism in the present invention.

[0036] Figure 5 It is a structural diagram of the re-inspection mechanism in the present invention.

[0037] Figure 6 Schematic diagram of the internal structure of the shell in the present invention.

[0038] Figure 7 Schematic diagram of the internal structure of the mobile seat in the present invention.

[0039] Figure 8 This is a flow chart of the magnetic particle inspection AI visual inspection method in the present invention.

[0040] Figure 9 This is a flow chart of the AI ​​processing unit in the present invention.

[0041] Reference numerals: 100, material sorting mechanism; 1001, conveyor belt; 1002, first cylinder; 1003, turntable; 1004, transition baffle; 1005, housing; 101, workpiece to be inspected;

[0042] 200, magnetizing feed assembly; 2002, bracket; 2003, push plate; 2004, through slot; 2005, steering wheel; 2006, rotating shaft; 2007, pulley; 2008, extension frame; 2009, moving seat; 201, clamping plate; 2011, first rotating slot; 2012, second rotating slot; 2013, switching slot; 2014, moving column; 2015, protrusion; 2016, spiral slot; 2017, moving ring; 2018, rotating block; 2019, connecting rod; 2021, bevel gear set; 2022, differential wheel; 2023, differential belt; 2024, push rod; 2027, belt;

[0043] 3001, support rod; 3002, darkroom; 3003, first slider; 3004, stroboscopic light source; 3005, prism assembly; 3006, knob; 3007, flap; 3008, suspension arm; 301, initial inspection mechanism; 3011, sorting baffle; 3012, demagnetization device; 3013, second slider; 3014, third slider; 3015, reflector; 302, re-inspection mechanism. DETAILED DESCRIPTION

[0044] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0045] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0046] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0047] Example 1

[0048] Reference Figures 1 to 8 This is the first embodiment of the present invention, which provides an AI visual inspection device for magnetic particle inspection. While performing magnetization spraying on multiple workpieces, the adjacent workpieces 101 to be inspected are kept at a distance to facilitate the subsequent initial inspection mechanism 301 and the re-inspection mechanism 302 to collect plane and side images, completing 360° visual inspection. The collected images are recorded and analyzed by the AI ​​processing unit to generate test results respectively. The two test results are fitted to determine the defect level, thereby improving the inspection production efficiency while improving the inspection accuracy and reducing the blind spot errors that are prone to manual inspection.

[0049] Specifically, it includes a magnetizing feeding assembly 200, and the magnetizing feeding assembly 200 includes a magnetizing mechanism;

[0050] The magnetizing mechanism is used to magnetize the workpiece 101 to be inspected, and the magnetizing area covers the outer surface of the workpiece 101 to be inspected;

[0051] Detection assembly, the detection assembly is provided on the frame in two sets in a front-to-back order, namely, an initial inspection mechanism 301 and a re-inspection mechanism 302;

[0052] The initial inspection mechanism 301 is used to perform a frontal visual inspection on the magnetized workpiece 101 to be inspected and obtain a first inspection result;

[0053] The re-inspection mechanism 302 is used to perform a side visual inspection on the workpiece 101 to be inspected after the initial inspection mechanism 301, and generate a second inspection result, and fit the second inspection result with the first inspection result to form a defect result for feedback on the outer surface of the workpiece 101 to be inspected, and perform a grade judgment based on the defect result.

[0054] It also includes a material sorting mechanism 100, which is used to sort the input workpieces 101 to be inspected and transmit them to the magnetizing mechanism; the magnetizing mechanism positions and sorts the workpieces 101 to be inspected while spraying, so that the workpieces 101 to be inspected enter the initial inspection mechanism 301 and the re-inspection mechanism 302 in the set order and interval.

[0055] Among them, in this embodiment, the workpiece 101 to be inspected is a bolt, and the material sorting mechanism 100 is an adapted bolt sorting machine, which transmits the bolts to the conveyor belt 1001 according to the set direction and spacing, and is transported to the magnetizing feeding assembly 200 by the conveyor belt 1001. At the same time, the material sorting mechanism 100 arranges the screws vertically up and down to increase the contact area between the screws and the magnetizing mechanism and reduce the spraying dead angle.

[0056] Preferably, the magnetizing feeding assembly 200 also includes a spray component, a nozzle and a clamp 201. The magnetizing mechanism magnetizes the workpiece to be inspected 101. The spray component is used to spray the magnetic powder liquid onto the outer surface of the magnetized workpiece to be inspected 101. The nozzle sprays the magnetic powder liquid onto the workpiece to be inspected 101. The clamp 201 simultaneously limits each workpiece to be inspected 101.

[0057] Among them, in this embodiment, a conveyor belt 1001 is rotated in the magnetized feeding assembly 200, and the workpieces 101 to be inspected are arranged on the conveyor belt 1001 at intervals up and down. The workpieces 101 to be inspected are transported by the conveyor belt 1001, and the conveying rate of the workpieces 101 to be inspected is related to the conveyor belt 1001. In this embodiment, the conveyor belt 1001 adopts a disc shape, and the work station switching is achieved by rotation. In other embodiments, the conveyor belt 1001 can adopt a long strip, oval, or U-shaped shape to achieve the work station switching of the workpiece 101 to be inspected.

[0058] More preferably, in other embodiments, a round steel limiting device is further provided on the conveyor belt 1001, and the round steel limiting device is used to prevent the workpiece 101 to be inspected from falling over or tilting, thereby making the workpiece 101 to be inspected more stable during transportation and the transmission position more accurate.

[0059] More preferably, when the number of workpieces 101 to be inspected in the magnetizing feeding assembly 200 reaches a set warning value, the conveyor belt 1001 stops working, the workpieces 101 to be inspected are magnetized by the magnetizing mechanism, and then the nozzle sprays magnetic powder liquid onto the surface of the workpieces 101 to be inspected.

[0060] Preferably, in this embodiment, the clamping plates 201 are symmetrically arranged and driven by the first cylinder 1002 to approach the workpiece 101 to be inspected from both sides simultaneously and tightly against it, thereby limiting and fixing each bolt to prevent it from being blown down during the spraying process.

[0061] Among them, a guide is provided between the magnetizing feeding assembly 200 and the detection assembly, and the guide is used to guide the workpiece 101 to be inspected from the magnetizing feeding assembly 200 into the detection assembly while maintaining a relative position. The magnetizing feeding assembly 200 also includes a shell 1005 mounted on the outside of the conveyor belt 1001, and a first cylinder 1002 arranged relatively stationary with the shell 1005. In this embodiment, the guide is a transition baffle 1004, which is provided at the connection between the conveyor belt 1001 and the turntable 1003 to guide the workpiece 101 to be inspected from the conveyor belt 1001 into the turntable 1003.

[0062] Preferably, the clamping plate 201 is controlled to move by the first cylinder 1002 to achieve clamping and loosening of the workpiece 101 to be inspected. The transition baffle 1004 is in an arc shape and the slot width is greater than the bolt diameter.

[0063] More preferably, the nozzle structure is a pipe with uniform openings, and the magnetic powder liquid is sprayed obliquely upward and evenly sprinkled onto the surface of the workpiece 101 to be inspected. After the magnetization spraying, the workpiece 101 to be inspected is continuously transported by the conveyor belt 1001 through the transition baffle 1004 to the turntable 1003.

[0064] Preferably, the detection assembly is set on the frame through the bracket 2002, and the detection assembly includes an adjustment structure and a visual structure. The visual structure includes a light source and a mirror group. The light source and the mirror group are respectively set on the adjustment structure. When the mirror group is set on the adjustment structure, an inspection interval is formed. The light source is used to provide auxiliary light for the mirror group to identify. When the workpiece 101 to be inspected passes through the inspection interval, the mirror group is assisted by the light source to identify the workpiece 101 to be inspected and generate a detection result.

[0065] Among them, the inspection assembly also includes a turntable 1003. The workpieces 101 to be inspected enter the turntable 1003 one by one from the conveyor belt 1001 and undergo two visual inspections in succession as it rotates. The two ends of the conveyor belt 1001 are respectively connected to the material sorting mechanism 100 and the turntable 1003. The distribution spacing between each workpiece 101 to be inspected on the conveyor belt 1001 determines the time interval for entering the turntable 1003.

[0066] Among them, the detection assembly also includes a darkroom 3002 arranged outside the initial inspection mechanism 301 and the re-inspection mechanism 302, and the mirror group includes a forward mirror group and a side mirror group. The forward mirror group is arranged on the initial inspection mechanism 301, and is used to perform forward visual inspection on the workpiece 101 to be inspected after magnetic spraying. In this embodiment, the forward mirror group is equipped with a camera with a set exposure value lens. In this embodiment, there are four cameras in total and the circular array is arranged at one end of the center of the first slider 3003.

[0067] More preferably, the adjustment structure is movably provided, and the adjustment structure is used to obtain the type of the workpiece 101 to be inspected and to move and adjust it. The initial inspection mechanism 301 and the re-inspection mechanism 302 have adjustment structures with different structures to adjust the angles and heights of the forward mirror group and the side mirror group respectively. The adjustment structure on the initial inspection mechanism 301 includes a support rod 3001, and a first slider 3003 is slidably provided on the support rod 3001. The initial inspection mechanism 301 is fixed on the first slider 3003.

[0068] Among them, the first slider 3003 slides vertically up and down along the support rod 3001, one end of the first slider 3003 is round, and a second slider 3013 is slidably provided on the support rod 3001, and a light source is provided on the second slider 3013. The light source includes a stroboscopic light source 3004 and a prism group 3005. The prism group 3005 is provided with a knob 3006 and a flip plate 3007. The stroboscopic light source 3004 is a stroboscopic light source, and the prism group 3005 adopts a prism. In other embodiments, the stroboscopic light source 3004 can be replaced with a fixed-frequency light source, and the prism group 3005 can adopt a lens to meet different production needs.

[0069] When the knob 3006 is rotated, the flap 3007 is rotated to a certain angle. By controlling the number of rotations of the knob 3006, the angle of light refracted by the prism assembly 3005 is adjusted to achieve the best exposure effect.

[0070] The prism group 3005 is also provided with a fill light, which cooperates with the prism group 3005 to provide sufficient fill light, improve the image acquisition exposure accuracy, and thus improve the subsequent processing and detection accuracy. The turntable 1003 is a transparent turntable to avoid blocking the light.

[0071] More preferably, the initial inspection mechanism 301 and the prism assembly 3005 can be adjusted in height by the first slider 3003 and the second slider 3013 to meet the requirements of bolt inspection of different specifications and sizes.

[0072] Furthermore, the re-inspection mechanism 302 also includes a support rod 3001 and a first slider 3003. A suspension arm 3008 is provided at the end of the first slider 3003. The suspension arm 3008 is rotatably provided with the side mirror group. An angle is formed between the side mirror group and the workpiece to be inspected 101, so that the side image information of the workpiece to be inspected 101 can be obtained through the camera, and the side visual inspection of the workpiece inspected by the initial inspection mechanism 301 can be performed.

[0073] A third sliding block 3014 is slidably mounted on the support rod 3001 , and a reflective plate 3015 is mounted on the third sliding block 3014 .

[0074] Among them, the reflector 3015 is slidably arranged under the turntable 1003 and refracts part of the light to the bottom of the workpiece to be inspected 101. The four lateral mirror groups distributed in an inclined cross-section are used to capture 360° images of the outside of the workpiece to be inspected 101, and combined with the forward mirror group on the initial inspection mechanism 301, visual imaging without blind spots is achieved.

[0075] Among them, this embodiment also includes an AI processing unit, which is used to fit the first detection result and the second detection result to form a defect result, and is used to locate the defect image position and calculate the defect parameters, determine the image detection result according to the defect parameters, and make judgments and classifications with reference to the image detection result.

[0076] Preferably, a demagnetization device 3012 and a sorting baffle 3011 are further provided at the end of the turntable 1003. The demagnetization device 3012 is used to demagnetize the workpiece 101 to be inspected, and the sorting baffle 3011 classifies the workpiece 101 to be inspected according to the classification judgment result of the AI ​​processing unit.

[0077] More preferably, the turntable 1003 rotates clockwise, and the initial inspection mechanism 301, the re-inspection mechanism 302, the demagnetization device 3012 and the sorting baffle 3011 are arranged clockwise behind the transition baffle 1004. The workpiece 101 to be inspected rotates clockwise with the turntable 1003 and passes through each process in sequence.

[0078] In summary, when in use, the workpiece 101 to be inspected enters the material sorting mechanism 100 for material sorting, and the bolts are neatly conveyed to the conveyor belt 1001, and are sent into the shell 1005 by the conveyor belt 1001 in the set direction for magnetization spraying. When the number of workpieces 101 to be inspected in the magnetization feeding assembly 200 reaches the set warning value, the conveyor belt 1001 stops working, and the workpiece 101 to be inspected is magnetized by the magnetizing mechanism, and then the nozzle sprays magnetic powder liquid onto the surface of the workpiece 101 to be inspected. During this process, the clamp 201 is driven by the first cylinder 1002 to clamp and limit the two sides of the bolt to prevent it from being blown down. After the spraying is completed, the conveyor belt 1001 starts to send the workpiece 101 to be inspected through the transition baffle 1004 into the upper end face of the turntable 1003.

[0079] At the same time, the workpiece 101 to be inspected rotates with the turntable 1003 and enters the darkroom 3002. At this time, the height and deflection angle of the initial inspection mechanism 301 and the re-inspection mechanism 302 are adjusted respectively, the prism group 3005 is adjusted to the set angle, and the stroboscopic light source 3004 is adjusted to the set value. The forward and lateral images of the workpiece 101 to be inspected are collected respectively, and the images are combined and summarized into a 360° visual inspection image and transmitted to the AI ​​processing unit. The AI ​​processing unit records the image data and judges the defect situation based on the image data, and gives a judgment result. Finally, the sorting baffle 3011 sorts the workpiece 101 to be inspected according to the judgment result.

[0080] Example 2

[0081] Reference Figures 1 to 8 , which is the second embodiment of the present invention. This embodiment is based on the previous embodiment, but differs in that the steering wheel 2005 is used to rotate the workpiece 101 to be inspected during spraying, so that the spraying is more uniform and the spraying dead angle caused by clamping is eliminated.

[0082] Specifically, a limiting component is further provided in the magnetizing mechanism, and the limiting component is used to make the workpiece 101 to be inspected rotate when the workpiece 101 to be inspected is sprayed, and to distribute each workpiece 101 to be inspected at a set distance. The limiting components are symmetrically arranged, and the two limiting components first position and clamp the workpiece 101 to be inspected when they approach it synchronously, and then make each workpiece 101 to be inspected rotate when they continue to approach it.

[0083] Among them, in this embodiment, the limiting component is a steering wheel 2005, and the four steering wheels 2005 are symmetrically distributed. They jointly clamp a single workpiece 101 to be inspected and drive the workpiece 101 to be inspected to rotate by rotating in opposite directions, thereby achieving uniform spraying of the magnetic powder liquid and eliminating blind spots in spraying.

[0084] Among them, a through groove 2004 is opened on the splint 201, and a steering wheel 2005 is rotatably arranged in the through groove 2004. A rotating shaft 2006 is provided at the axis of the steering wheel 2005. The rotating shaft 2006 rotates and passes through the splint 201 and is provided with a pulley 2007. The outer wall of each pulley 2007 is fitted with a belt 2027.

[0085] Preferably, the surface of each steering wheel 2005 is made of corrosion-resistant rubber material, there are two splints 201 and they are symmetrically distributed about the workpiece 101 to be inspected, the steering wheels 2005 are distributed in a linear array on the splint 201 on one side, and the belt 2027 is simultaneously mounted on the outer wall of each pulley 2007 to drive them to rotate synchronously.

[0086] Among them, the number of steering wheels 2005 is the number of workpieces to be inspected in a single test set by the magnetizing feeding assembly 200 plus one. The workpiece 101 to be inspected is rotated and fitted between two adjacent steering wheels 2005. The symmetrically arranged steering wheels 2005 rotate in opposite directions, so that when each steering wheel 2005 rotates, the workpiece 101 to be inspected is driven to rotate itself. When the magnetizing mechanism sprays, it simultaneously drives the workpiece 101 to be inspected to rotate.

[0087] More preferably, an extension frame 2008 is provided on the outer wall of the splint 201, and a movable seat 2009 is vertically provided on the extension frame 2008. The inner wall of the movable seat 2009 is respectively provided with a first rotation groove 2011, a second rotation groove 2012 and a switching groove 2013, and the switching groove 2013 is arranged vertically with the first rotation groove 2011 and the second rotation groove 2012.

[0088] Among them, a moving column 2014 is slidably provided in the moving seat 2009, a protrusion 2015 is provided on the outer wall of one end of the moving column 2014, and a spiral groove 2016 is opened on the outer wall of the other end. The protrusion 2015 is slidably provided in the first rotating groove 2011, the second rotating groove 2012 and the switching groove 2013.

[0089] More preferably, a moving ring 2017 is slidably provided between the inner wall of the moving seat 2009 and the outer wall of the moving column 2014 , and a rotating block 2018 is provided on the inner wall of the moving ring 2017 , and the rotating block 2018 is slidably provided on the inner wall of the spiral groove 2016 .

[0090] Among them, the lower end surface of the shell 1005 is provided with a loading platform, and a bracket 2002 is vertically provided on the loading platform. A first cylinder 1002 is vertically slidably provided on the bracket 2002, and a push plate 2003 is provided at the telescopic end of the first cylinder 1002.

[0091] Among them, the spiral groove 2016 is a spiral groove hole, and the rotating block 2018 fits tightly against the spiral groove 2016, so that when the moving column 2014 can move, the rotating block 2018 pushes the spiral groove 2016 and the moving column 2014 to move as it follows the moving ring 2017. When the moving column 2014 is limited and cannot continue to move, the rotating block 2018 drives the moving column 2014 to rotate as it slides along the spiral groove 2016.

[0092] Among them, the outer wall of the movable column 2014 is also coaxially provided with a connecting rod 2019, and the end of the connecting rod 2019 is provided with a bevel gear set 2021. The axis of the bevel gear set 2021 and the axis of the pulley 2007 can also be detachably provided with a differential wheel 2022, and a differential belt 2023 is provided between the two differential wheels 2022.

[0093] Preferably, the two differential wheels 2022 can change the transmission ratio by disassembling and installing. The transmission ratio between the two differential wheels 2022 is determined according to the spraying efficiency and the diameter of the product. The faster the set spraying efficiency, the larger the transmission ratio should be, and the smaller the product diameter, the larger the transmission ratio should be, thereby achieving rapid clamping.

[0094] Furthermore, a push rod 2024 is provided on the end face of the movable ring 2017. The push rod 2024 slides through the movable seat 2009 and is fixedly connected to the push plate 2003 and moves synchronously therewith.

[0095] When in use, the rotation direction of the spiral groove 2016 and the upper and lower position relationship between the bevel gear set 2021 and the differential wheel 2022 are adjusted to adjust the rotation direction of the steering wheel 2005, so that the two symmetrically arranged sets of steering wheels 2005 rotate in opposite directions, and finally drive the workpiece 101 to be inspected to rotate in situ, so as to achieve uniform spraying of various areas of the workpiece and eliminate dead angles and blind spots caused by clamping.

[0096] In summary, when in use, the telescopic end of the first cylinder 1002 is started to move inward, and the push plate 2003 moves through the push rod 2024 to drive the moving ring 2017 to move along the inner wall of the moving seat 2009. In the initial state, the two groups of moving seats 2009 and the clamping plate 201 have moving space and move accordingly, until the two symmetrically arranged groups of clamping plates 201 and the steering wheel 2005 above jointly clamp and limit the workpiece 101 to be inspected. Even if there is an error in the sorting of the workpiece 101 to be inspected, it can be re-sorted under the action of the steering wheel 2005 to ensure the spacing, which is convenient for the next step of image acquisition.

[0097] In addition, after the clamping plate 201 and the movable seat 2009 complete the clamping of the workpiece 101 to be inspected, the movable column 2014 is limited and cannot move further, and the telescopic end of the first cylinder 1002 continues to move, and the movable ring 2017 moves accordingly and drives the rotating block 2018 located thereon to slide along the spiral groove 2016, driving the movable column 2014 to rotate, and drives the differential wheel 2022 to rotate through the connecting rod 2019 and the bevel gear set 2021, and finally drives the belt 2027 and the pulley 2007 to rotate, and finally the two symmetrically arranged sets of steering wheels 2005 rotate in different directions, driving the workpiece 101 to be inspected to rotate, and spraying to various areas during spraying, realizing 360° spraying.

[0098] Example 3

[0099] Reference Figures 1-9 , which is the third embodiment of the present invention. This embodiment is based on the previous embodiment, but the difference is that this embodiment provides a control system for controlling the motion trajectory and speed of the workpiece 101 to be inspected in the visual inspection device, and at the same time controlling the adjustment structure to adjust the angle and height of the visual structure according to the size of the workpiece.

[0100] Specifically, it also includes a control system, which includes an adjustment module and an execution module. The adjustment module includes position sensors arranged on the conveyor belt 1001 and the turntable 1003. The control system obtains the specifications and spacing between each workpiece 101 to be inspected through the position sensor. The sensor collects and records data and transmits it to the adjustment module.

[0101] The adjustment module processes the spacing data and outputs a transmission rate adjustment instruction to the execution module. The execution module receives the adjustment instruction and adjusts the transmission rate of the workpiece 101 to be inspected.

[0102] At the same time, the execution module calls the historical experience database, in which the operator sets the commonly used supporting parameters, obtains the adaptation parameters of the workpiece 101 to be inspected of the specification and size, and controls the adjustment structure to change to the angle and height of the mirror group and light source that are adapted to the specification and size of the workpiece 101 to be inspected according to the adaptation parameters, so that adjacent workpieces 101 to be inspected pass through each inspection process in sequence at the set rate, and automatically adapt to the product specification and size of the workpiece 101 to be inspected, thereby expanding the application scenarios and reducing the downtime operation and maintenance caused by the mirror group setting.

[0103] Preferably, the adjustment module also includes a counting sensor provided at the entrance of the magnetizing mechanism. The counting sensor records in real time the number of workpieces 101 to be inspected entering the magnetizing mechanism. When the number of workpieces reaches the threshold of the number of single magnetization sprays of the magnetizing mechanism, a counting signal is sent to the adjustment module. After receiving the counting signal, the adjustment module triggers a cut-off signal and sends it to the execution module. The execution module controls the conveyor belt 1001 to pause magnetization.

[0104] More preferably, the magnetizing mechanism starts timing when it completes magnetizing the workpiece 101 to be inspected, and magnetizes the workpiece 101 to be inspected according to the set spraying time. After the magnetization is completed, a high-voltage signal is sent to the execution module through the timer. The execution module receives the high-voltage signal and controls the telescopic end of the first cylinder 1002 to extend outward, clamps the workpiece 101 to be inspected through the clamping plate 201, and starts the motor at the same time.

[0105] Among them, the two side clamps 201 simultaneously contact the workpiece to be inspected 101 to form a closed loop. After the loop is connected, a spraying electrical signal is generated and transmitted to the execution module. The execution module receives the spraying electrical signal and sprays. At the same time, the workpiece to be inspected 101 is clamped in the gap between the steering wheels 2005 on the clamp 201, limiting the workpiece to be inspected 101 and driving it to rotate, thereby realizing spraying of various outer surfaces of the workpiece to be inspected 101 and eliminating blind spots in spraying.

[0106] More preferably, the control system also includes a magnetic powder concentration monitoring module, a magnetic powder liquid automatic configuration module, and a dual-storage barrel magnetic powder liquid supply module. The magnetic powder concentration monitoring module is used to detect the magnetic powder liquid level, component ratio and mixing uniformity in the magnetic powder liquid barrel. The magnetic powder liquid automatic configuration module includes two spare magnetic powder liquid barrels. When the content in the magnetic powder liquid barrel in use is lower than the set standard threshold, the magnetic powder liquid automatic configuration module is triggered and the spare magnetic powder liquid barrel is used to replace it. The dual-storage barrel magnetic powder liquid supply module includes a magnetic powder liquid replenishing pipe and a drain pipe connected to the two spare magnetic powder liquid barrels. The missing magnetic powder liquid components are replenished through the magnetic powder liquid replenishing pipe, or the pre-mixed magnetic powder liquid is replenished. The drain pipe is used to discharge the magnetic powder liquid that cannot be replenished and replenish the pre-mixed magnetic powder liquid after discharge.

[0107] Furthermore, after the set spraying time ends, the timer sends a low-voltage signal to the execution module, and the execution module controls the contraction of the telescopic end of the first cylinder 1002 to release the limit of the clamp 201 on the workpiece 101 to be inspected. At the same time, the conveyor belt 1001 continues to run, and the workpiece 101 to be inspected that has completed the magnetization spraying is guided into the turntable 1003 along the guide.

[0108] Preferably, the linear speed of the turntable 1003 is synchronized with the speed of the conveyor belt 1001, so that the workpiece 101 to be inspected enters the turntable 1003 from the conveyor belt 1001 along the guide, and after entering the turntable 1003, it still maintains the same spacing along the circumferential direction and enters the initial inspection mechanism 301 and the re-inspection mechanism 302 in turn.

[0109] In other embodiments, the guide member is provided with a certain slope, and the workpieces 101 to be inspected on the conveyor belt 1001 completely enter and are stacked in the guide member. The execution module controls the turntable 1003 to rotate at a set angle and drives the single workpiece 101 to be inspected closest to the turntable 1003 to rotate. Then, under the action of gravity and the slope, the workpieces 101 to be inspected continue to slide down and enter the turntable 1003 one by one. The spacing of the workpieces 101 to be inspected on the turntable 1003 is completely determined by the rotation speed of the turntable 1003.

[0110] More preferably, the execution module further includes a conveying control unit, which is electrically connected to the magnetizing mechanism, the nozzle, the conveyor belt 1001, and the turntable 1003, and is used to control the opening and closing of the magnetizing mechanism and the nozzle, and the start and stop of the conveyor belt 1001 and the turntable 1003, so that the workpieces 101 to be inspected are magnetized and sprayed in batches, and sequentially pass through the initial inspection mechanism 301 and the re-inspection mechanism 302 for front and side visual inspections;

[0111] The execution module further includes a deviation correction unit, which is used to compare the adjacent distances between each workpiece 101 to be inspected, and adjust the transmission rate of the conveyor belt 1001 to the same process switching time when the distances between adjacent workpieces 101 to be inspected deviate.

[0112] For example, when the distance between two adjacent workpieces 101 to be inspected changes, the workpieces 101 to be inspected can automatically increase or decrease the rotation speed of the turntable 1003 according to the distance deviation, thereby reducing the missed inspection or empty inspection of workpieces caused by the distance change and improving the inspection accuracy.

[0113] Example 4

[0114] Reference Figures 1-9 , which is the fourth embodiment of the present invention. This embodiment is based on the previous embodiment, but differs in that this embodiment provides an AI visual inspection method for magnetic particle inspection and an AI processing unit capable of self-iterative learning, thereby improving the accuracy of the judgment results of magnetic particle inspection through continuous correction by the operator.

[0115] Specifically, based on the above-mentioned magnetic particle inspection AI visual inspection device, the magnetic particle inspection AI visual inspection method includes:

[0116] S1: The workpieces 101 to be inspected are sorted by the sorting mechanism 100 and neatly output to the conveyor belt 1001, and then quickly transported to the magnetizing feeding assembly 200 in a specified direction.

[0117] S2: A magnetizing mechanism is installed on the conveyor belt 1001, and a clamping plate 201 and a spraying device are installed inside the housing 1005. The clamping plate 201 positions and fixes a row of workpieces 101 to be inspected that enter the housing 1005, maintaining the spacing between the workpieces while preventing the magnetizing device from being affected by the magnetic force and attracting the workpieces 101 to be inspected during the magnetization process, or blowing down the workpieces 101 to be inspected during the spraying of magnetic powder liquid. When there are defects on the workpieces 101 to be inspected, the defective position will attract magnetic powder, thereby achieving simultaneous magnetization and spraying of multiple workpieces 101 to be inspected;

[0118] S3: After the magnetization and spraying, the workpiece 101 to be inspected is smoothly transported to the turntable 1003 through the conveyor belt 1001 and the transition baffle 1004. There are multiple sets of 360° visual imaging mechanisms on the upper part of the turntable 1003, which can capture clear images of the product at 360° without blind spots. Two sets of cameras respectively shoot from the side and front angles to collect image information in three dimensions.

[0119] The side multi-camera 360° prism vision system has 4-8 groups of cameras, each of which can be rotated and tilted to facilitate debugging and capturing side images. A customized lens with adjustable exposure is installed in front of the camera to obtain clear images. A prism group 3005 and a stroboscopic light source 3004 are installed below the camera. In this embodiment, the stroboscopic light source 3004 uses a high-brightness stroboscopic UV lamp, and is equipped with forward and side light sources for fill light to ensure sufficient light source. At the same time, other embodiments can add a bottom light source to provide fill light from the bottom, thereby improving the clarity of the captured image and the accuracy of defect detection.

[0120] S5: The control system further includes an AI processing unit, which is used to fit the first detection result and the second detection result to form a defect result, and is used to locate the defect image position and calculate the defect parameters, and determine the image detection result according to the defect parameters; the AI ​​processing unit also includes an AI magnetic particle inspection model, the image is identified and the inspection area is found through the AI ​​magnetic particle inspection model, and visual analysis and inspection are performed based on the front image and the side image input by the mirror group, and the defect area is found by fitting the results; the AI ​​processing unit also automatically labels the front image and the side image, calculates the defect parameters, and determines the defect level according to the defect value;

[0121] The image is identified and the inspection area is found through the AI ​​magnetic particle inspection model, and analysis and inspection are performed based on the front and side images input by the inspection assembly;

[0122] S5.1: An automatic labeling system was developed by combining image processing technology and machine learning methods. This system uses the existing AI magnetic particle inspection model to perform preliminary inspections on the front and side images, and generates labels for suspected defect areas. The operator can confirm and correct the defects through the interface. The PostgreSQL database is used to store images and corresponding labeling information, which can be easily retrieved and analyzed.

[0123] S5.2: Use edge detection image processing algorithms to calculate the bounding box coordinates of the defect and provide the defect location coordinates and depth calculation formula;

[0124] First, preprocess the image to enhance defect visibility. Use Gaussian filtering or median filtering to remove image noise and improve the accuracy of subsequent detection. Use the Canny edge detection algorithm to identify edges in the image. Specifically, use the Sobel operator to calculate the gradient value of the image to obtain the edge strength and direction of the image. Process the gradient map to remove non-edge pixels and retain the local maximum. Set two thresholds to classify edges into strong edges, weak edges, and non-edges. Connect weak edges through strong edges to form a complete edge map.

[0125] According to the extracted contour point set P, calculate the bounding box coordinates P of the defect k ={(x i ,y i )}:

[0126] in:

[0127] x min =min(P k，x )

[0128] x max =max(P k，x )

[0129] y min =min(P k，y )

[0130] y max =max(P k，y )

[0131] Among them, x min 、x max are the two extreme values ​​of the horizontal coordinate of the image bounding box, y min 、y max They are the two extreme values ​​of the vertical coordinate of the image bounding box, (x i ,y i ) is the coordinate of point i in the bounding box point set, P k is the set of coordinate points in the k region, P k，x is the set of horizontal coordinates of the k-region coordinate points in the present invention, Pk，y It is the set of ordinates of k region coordinate points in the present invention.

[0132] Substituting the bounding box coordinates into the defect center point P center The coordinate calculation formula is:

[0133] P center =(x center ,y center , z center )

[0134] in,

[0135]

[0136]

[0137] Among them, x min，front , x max，front are the two extreme values ​​of the horizontal coordinates of the front image bounding box;

[0138] y min，front ,y max，front are the two extreme values ​​of the vertical coordinates of the front image bounding box;

[0139] x min，side , x max，side are the two extreme values ​​of the horizontal coordinate of the side image bounding box;

[0140] y min，side ,y max，side are the two extreme values ​​of the vertical coordinates of the side image bounding box;

[0141] Z front is the depth value in the front image, Z side is the depth value in the side image.

[0142] Combine the areas of the front and side images to assess the defect size:

[0143] A total =A front +A side

[0144] Among them, A front =(x max，front -x min，front )×(y max，front -y min，front )

[0145] A side =(x max，side -x min，side )×(y max，side -y min，side )

[0146] According to A total The defect level is determined by the numerical value:

[0147] A total <20, it is judged as qualified product;

[0148] 20≤A total ≤100, it is judged as defective and sorted as qualified products;

[0149] 100<A total , determined to be unqualified products;

[0150] Combine the collected front and side image information to obtain the defect depth value:

[0151]

[0152] Among them, D front is the depth of the defect in the front image, D side It is the defect depth judged in the side image. When the defect depth value is greater than the set value, it is judged as a defective product.

[0153] S5.3: Develop a touch-screen user interface that allows the operator to confirm, correct, or mark new defects in the model's inspection results. Preferably, the feedback interface can provide functions such as image magnification, defect selection, and defect type selection. More preferably, the AI ​​magnetic particle inspection model compares the operator's feedback with the determined defect area and depth and classifies them into "positive samples" (correct detection) and "negative samples" (detection that needs improvement), and uses the classified operator feedback information to update the database.

[0154] S5.4: Use transfer learning technology to integrate new labeled data into the existing model. Preferably, fine-tune the existing model weights so that it can adapt to the new data without starting training from scratch, improving training efficiency. Use the EWC online learning method to ensure that the model retains previously learned knowledge when learning new samples to avoid catastrophic forgetting. At the same time, allow the model to be updated in parallel in different threads to ensure real-time performance and efficiency.

[0155] S5.5: Use global accuracy and introduce the ROC curve to evaluate model performance. Compare the correction results given by the operator and analyze the detection effect of various defects. Monitor the loss change, accuracy and other indicators during the training process in real time. Display the performance of the latest model on new data until the model accuracy reaches the preset value.

[0156] S6: The sorting baffle 3011 sorts the inspected workpieces according to the judgment results of the AI ​​processing unit. After inspection, the products are unloaded into the good product and defective product ports respectively. A demagnetization device 3012 is installed at the end of the good product port to demagnetize the products.

[0157] Example 5

[0158] Reference Figures 1-9 , which is the fifth embodiment of the present invention, is based on embodiment 1, except that the magnetization method and subsequent processing of the magnetization mechanism are further optimized.

[0159] Specifically, the magnetizing method of the magnetizing mechanism includes, in addition to the non-contact magnetizing coil magnetizing, positive and negative pole contact magnetizing, in which the positive and negative poles directly contact the workpiece 101 to be inspected and pass a current with set parameters to make it magnetic, thereby completing magnetization.

[0160] Furthermore, it also includes a magnetic powder liquid configuration unit, which avoids the time waste caused by stopping to replace the magnetic powder liquid cylinder by setting a spare magnetic powder liquid cylinder for replacement, and solves the difficulty of traditional magnetic powder liquid concentration testing being inconvenient and requiring frequent manual replacement of magnetic powder liquid.

[0161] Among them, in other embodiments, a magnetic powder liquid cylinder can be provided. When the magnetic powder liquid ratio is out of balance and does not meet the production needs or the product batch is changed, the type of magnetic powder liquid can be quickly replaced to adapt to different production needs.

[0162] More preferably, the workpiece 101 to be inspected is assisted in positioning during spraying. In this embodiment, a vacuum suction cup is used to overcome the misalignment of the workpiece 101 to be inspected caused by the magnetic force and liquid impact force during the spraying or magnetization process, thereby avoiding errors generated during subsequent forward image acquisition and lateral image acquisition, and improving detection accuracy.

[0163] Furthermore, the workpiece 101 to be inspected is subjected to surface treatment after the magnetization spraying is completed, so as to remove excess magnetic powder liquid on the surface of the workpiece 101 to be inspected, thereby preventing excessive magnetic powder liquid from affecting subsequent visual image observation and improving imaging effect and detection stability.

[0164] Among them, during the image detection process, a multi-station detection assembly is set up. Exemplarily, six directions are set in this embodiment, including up, down, left, right, front and back. In other embodiments, other numbers of stations can be used to meet the requirements of multi-angle visual detection. The workpiece 101 to be inspected after spraying is completed is subjected to multi-station comprehensive collection. The camera group on each station can automatically focus to ensure that the clearest image is obtained. The judgment result is output separately according to the image results collected at each angle of each station, and re-inspection is performed based on the image collection results of adjacent angles to obtain more accurate detection results.

[0165] More preferably, a demagnetization mechanism is separately provided at the outlet of qualified products, and unqualified products are manually re-inspected to re-determine the product inspection results. In other embodiments, a demagnetization mechanism is also provided at the outlet of unqualified products, and the unqualified products are demagnetized by the demagnetization mechanism and input into the magnetic particle inspection AI visual inspection device again and use the previous numbering. The two inspection results are compared, and when the two results are the same and the product is determined to be unqualified, manual re-inspection is performed when the results are different, thereby reducing the number of re-inspections of workpieces and improving the overall inspection efficiency.

[0166] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, directional changes, etc.) without departing substantially from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clause is intended to cover the structure that performs the function described herein, and is not only structurally equivalent but also equivalent structures. Without departing from the scope of the present invention, other replacements, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the exemplary embodiments. Therefore, the invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0167] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (i.e., those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0168] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0169] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A magnetic particle inspection AI visual inspection device, comprising a frame for mounting the entire magnetic particle inspection AI visual inspection device, characterized in that: Also includes: A magnetizing feeding assembly (200), wherein the magnetizing feeding assembly (200) comprises a magnetizing mechanism; The magnetizing mechanism is used to magnetize the workpiece to be inspected (101), and the magnetizing area covers the workpiece to be inspected (101), and the workpiece to be inspected (101) is a bolt; The detection assembly is provided with two sets on the frame in a front-to-back order, namely an initial inspection mechanism and a re-inspection mechanism; The initial inspection mechanism is used to perform a frontal visual inspection on the magnetized workpiece and obtain a first inspection result; The re-inspection mechanism is used to perform a side visual inspection on the workpiece inspected by the initial inspection mechanism, and generate a second inspection result, and fit the second inspection result with the first inspection result to form a defect result for feedback on the outer surface of the workpiece, and perform a grade judgment based on the defect result; The magnetizing feeding assembly (200) further includes a material sorting mechanism, the material sorting mechanism is used to sort the input workpieces (101) to be inspected and transmit them to the magnetizing mechanism, a guide is provided between the magnetizing feeding assembly (200) and the inspection assembly, the guide is used to guide the workpieces (101) to be inspected from the magnetizing feeding assembly (200) into the inspection assembly while maintaining a relative position, and the magnetizing mechanism positions and sorts the workpieces (101) to be inspected while spraying; The magnetizing mechanism further comprises a spraying assembly, the spraying assembly being used to spray the magnetic powder liquid onto the outer surface of the magnetized workpiece (101) to be inspected, and the magnetizing mechanism simultaneously drives the workpiece (101) to be inspected to rotate when spraying; It also includes a clamping plate (201), and the clamping plates (201) on both sides simultaneously contact the workpiece to be inspected (101) to form a closed loop. After the loop is connected, a spraying electrical signal is generated and transmitted to the execution module. The execution module receives the spraying electrical signal and performs spraying. When the clamping plate (201) approaches the workpiece to be inspected (101), it first clamps, limits, and sorts it, and finally drives the workpiece to be inspected (101) to rotate, thereby achieving 360° spraying. It also includes a deviation correction unit, which is used to compare the adjacent distances between each workpiece (101) to be inspected, and adjust the transmission speed of the conveyor belt or the turntable to be consistent with the process switching time when the distances between adjacent workpieces (101) to be inspected deviate; Also included is an AI processing unit, the AI ​​processing unit being configured to fit the first detection result and the second detection result to form a defect result, and to locate the defect image position and calculate defect parameters, and determine the image detection result according to the defect parameters; The AI ​​processing unit also includes an AI magnetic particle inspection model, which identifies the image and finds the inspection area through the AI ​​magnetic particle inspection model. It also performs visual analysis and inspection based on the front image and side image input by the lens group, and fits the results to find the defect area. The AI ​​processing unit also automatically labels the front image and side image, calculates defect parameters, and determines the defect level based on the defect value. A limiting component is also provided in the magnetizing mechanism, and the limiting component is used to cause the workpiece (101) to rotate when the workpiece (101) to be inspected is sprayed, and to distribute each workpiece (101) to be inspected at a set distance; The limiting components are symmetrically arranged, and when the two limiting components synchronously approach the workpiece (101) to be inspected, they first position and clamp it, and then when they continue to approach, they cause each workpiece (101) to be inspected to rotate; The splint (201) is provided with a through slot (2004), a steering wheel (2005) is rotatably provided in the through slot (2004), a rotating shaft (2006) is provided at the axis of the steering wheel (2005), the rotating shaft (2006) is rotatably passed through the splint (201) and provided with a pulley (2007), and a belt (2027) is fitted around the outer wall of each pulley (2007); An extension frame (2008) is provided on the outer wall of the splint (201), a movable seat (2009) is vertically provided on the extension frame (2008), a first rotation groove (2011), a second rotation groove (2012) and a switching groove (2013) are respectively provided on the inner wall of the movable seat (2009), and the switching groove (2013) is vertically provided with the first rotation groove (2011) and the second rotation groove (2012); A moving column (2014) is slidably provided in the moving seat (2009), a protrusion (215) is provided on the outer wall of one end of the moving column (2014), and a spiral groove (2016) is provided on the outer wall of the other end, and the protrusion (2015) is slidably provided in the first rotating groove (2011), the second rotating groove (2012) and the switching groove (2013); A moving ring (2017) is slidably sleeved between the inner wall of the moving seat (2009) and the outer wall of the moving column (2014); a rotating block (2018) is provided on the inner wall of the moving ring (2017); and the rotating block (2018) is slidably arranged on the inner wall of the spiral groove (2016); The magnetizing feeding assembly (200) further comprises a housing (1005), wherein a loading platform (2001) is provided on the lower end surface of the housing (1005), a bracket (2002) is vertically provided on the loading platform (2001), a first cylinder (1002) is vertically slidably provided on the bracket (2002), and a push plate (2003) is provided at the telescopic end of the first cylinder (1002); The outer wall of the movable column (214) is also coaxially provided with a connecting rod (219), the end of the connecting rod (219) is provided with a bevel gear set (221), the axis of the bevel gear set (221) and the axis of the pulley (2007) are also detachably provided with a differential wheel (222), and a differential belt (223) is provided between the two differential wheels (222); The end surface of the movable ring (2017) is provided with a push rod (2024), and the push rod (2024) slides through the movable seat (2009) and is fixedly connected to the push plate (2003) and moves synchronously therewith.

2. The magnetic particle inspection AI visual inspection device according to claim 1, characterized in that: The detection assembly is arranged on a frame via a bracket. The detection assembly comprises an adjustment structure and a visual structure. The visual structure comprises a light source and a mirror group. The light source and the mirror group are respectively arranged on the adjustment structure. When the mirror group is arranged on the adjustment structure, an over-inspection interval is formed. The light source is used to provide auxiliary light for the mirror group to identify. When the workpiece (101) to be inspected passes through the inspection interval, the mirror group is assisted by the light source to identify the workpiece (101) to be inspected and generate a detection result.

3. The magnetic particle inspection AI visual inspection device according to claim 2, characterized in that: The light source includes a flash light source or a fixed frequency light source, and the lens of the lens assembly includes a prism or a lens; The mirror group comprises a forward mirror group and a side mirror group, wherein the forward mirror group is arranged on the initial inspection mechanism and is used for performing forward visual inspection on the workpiece (101) to be inspected after magnetization spraying, and the side mirror group is arranged on the re-inspection mechanism and is used for performing side visual inspection on the workpiece inspected by the initial inspection mechanism.

4. The AI ​​visual inspection device for magnetic particle inspection according to claim 3, characterized in that: The adjustment structure is movably arranged, and is used to obtain the type of the workpiece (101) to be inspected and to perform movement adjustment, so as to respectively adjust the angle and height of the forward mirror group and the side mirror group.

5. The magnetic particle inspection AI visual inspection device according to claim 4, characterized in that: The invention also includes a control system, which includes an adjustment module and an execution module. The control system obtains the spacing between each workpiece to be inspected (101) output by the magnetizing feeding assembly (200), processes it and outputs a transmission rate adjustment instruction. The execution module receives the adjustment instruction and adjusts the transmission rate of the workpiece to be inspected (101), so that adjacent workpieces to be inspected (101) enter the initial inspection mechanism and the re-inspection mechanism in sequence.

6. The magnetic particle inspection AI visual inspection device according to claim 5, characterized in that: The control system further comprises a conveying control unit, which is used to control the magnetizing mechanism to spray magnetization on the workpieces (101) to be inspected in batches, and sequentially pass through the initial inspection mechanism and the re-inspection mechanism for front and side visual inspection; It also includes a deviation correction unit, which is used to compare the adjacent distances between each workpiece (101) to be inspected, and adjust the conveying rate to make the process switching time consistent when the distances between adjacent workpieces (101) to be inspected deviate.

Images