Current transformer appearance detection device and method

Abstract

The invention discloses a current transformer appearance detection device and method, and belongs to the technical field of optical detection.The device comprises a detection table, an image acquisition module, a pushing assembly and a switching mechanism, the surface of the detection table is sleeved with the pushing assembly, and an extension bracket is welded to one side of the detection table; a switching mechanism is inserted into the middle of the extending bracket in a penetrating mode, an inserting sleeve is inserted into the surface of the switching mechanism in a penetrating mode, a fluted disc is integrally formed at the top of the inserting sleeve, and a material supporting assembly is inserted into the top of the fluted disc. According to the invention, two processes of rotation and overturning can be rapidly realized, so that the angle range of optical identification can be changed in a short time, two surfaces of the current transformer and the inner wall area of the central through hole can be efficiently detected and identified by means of a single image acquisition module, the detection efficiency is improved, the identification dead angle area is eliminated, and the detection accuracy is improved. And moreover, the equipment cost is reduced, the workpieces can be quickly discharged, and the protection effect on the workpieces is also improved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical detection, and more specifically, to an appearance detection device and method for current transformers. Background Art

[0002] After the production of current transformers, their appearance needs to be detected. The main purpose of this process is to identify physical defects and damages of the transformers to ensure that their appearance has no damage, deformation, leakage, etc. The specific detection contents include: checking whether the outer shell has breakage, cracks or deformation; checking whether the surface has dirt, corrosion or scratches; checking whether the wiring terminals are loose, corroded or damaged. Through these detections, the physical state of the transformers can be ensured to be good, potential safety hazards caused by appearance problems can be avoided, and thus the normal operation and safety of the power system can be guaranteed.

[0003] In the prior art, the appearance detection devices applied to current transformers all build a vision system to collect optical graphics, take pictures of the surface of the current transformers to be detected, and then complete the detection by identifying and analyzing the collected pictures. However, since current transformers are generally annular or rectangular and have a central through hole in the middle, this leads to a relatively complex surface structure. Normal recognition cannot efficiently detect both sides of the current transformer, especially the inner wall of the central through hole, which will be blocked by its own structure, resulting in the inability to quickly take pictures and detect, and there are a large number of detection dead zones. If the mechanical arm is directly used for multiple flips, it will increase the time required for the detection process and the equipment cost is high.

[0004] The prior art document 1 (CN118483245A) discloses an appearance detection device and method for current transformers. During the process of controlling the driving unit to drive the transportation unit to repeatedly move forward and backward along the guide rail, the image of the current transformer in the transportation unit is obtained through the image acquisition device, and then image analysis is carried out. By controlling the driving unit to drive the transportation unit to repeatedly move forward and backward along the guide rail, only the unobstructed part of the current transformer can be photographed and collected, the detection accuracy is reduced, and the clamping of the fixture may cause damage to the current transformer. Summary of the Invention

[0005] To solve the deficiencies in the prior art, the present invention provides an appearance detection device and method for current transformers. The present invention can quickly realize two processes of rotation and flipping, so as to be able to change the angle range of optical recognition in a short time, and with the help of a single image acquisition module, it can efficiently detect and identify both sides of the current transformer and the inner wall area of the central through hole, improve the detection efficiency, eliminate the recognition dead zones, reduce the equipment cost, be able to quickly discharge the workpiece, and also improve the protection effect on the workpiece.

[0006] The present invention adopts the following technical solution.

[0007] The first aspect of the present invention discloses a current transformer appearance inspection device, including an appearance inspection device body and a workpiece to be tested, wherein the appearance inspection device body includes a detection platform, an image acquisition module, a pushing component and a switching mechanism, a discharge trough is provided on the surface of the detection platform, a storage box is welded to the bottom of the discharge trough, a pushing component is sleeved on the surface of the detection platform, an extension bracket is welded to one side of the detection platform, and a switching mechanism is inserted in the middle of the extension bracket.

[0008] A plug-in sleeve is inserted through the surface of the switching mechanism, a toothed disc is integrally formed on the top of the plug-in sleeve, and a supporting component is inserted on the top of the toothed disc to achieve the effect of supporting or releasing the support of the workpiece to be measured, avoiding damage to the surface of the workpiece to be measured, and the exhaust and inflation process is more efficient.

[0009] The workpiece to be measured is placed on the surface of the toothed disc, and the two support components are used to pass through the center through hole of the workpiece to be measured.

[0010] A support frame is welded to the bottom side of the storage box, and an image acquisition module is screwed to the top of the support frame. The image acquisition module identifies and photographs the surface of the workpiece to be tested, and is used to detect and identify the two sides of the current transformer and the inner wall area of ​​the central through hole, thereby improving the detection efficiency and eliminating blind spots in identification.

[0011] Preferably, a breathable net is laid in the middle of the surface of the testing platform, a front end plate is integrally formed at one end of the extension bracket, a rear end plate is integrally formed at the other end of the extension bracket, and inflation holes are opened on the surface of the extension bracket.

[0012] Preferably, an air pump is screwed onto the surface of the extension bracket, an air charging pipe is inserted into one end of the air pump, and the air charging pipe is embedded into the interior of the extension bracket and communicated with the air charging hole.

[0013] Preferably, the switching mechanism includes a motor and a rotating arm, a driving shaft is inserted into the output end of the motor, a fixed sleeve is welded on the surface of the driving shaft, a rotating arm is integrally formed on the surface of the fixed sleeve, a plug-in sleeve is inserted into the end of the rotating arm, and an air inlet hole is opened at the bottom of the plug-in sleeve.

[0014] Preferably, the outer shell of the motor is fixed to the surface of the front end plate by screws, the end of the drive shaft is embedded in the surface of the rear end plate through a bearing, the plug-in sleeve is connected to the inflation hole part through the air inlet hole at the end, a one-way valve structure is installed inside the plug-in sleeve, and the plug-in sleeve is embedded in the internal area of ​​the rotating arm and is movably connected through a bearing.

[0015] Preferably, the pushing component includes an electric telescopic rod and a rack. A connecting plate is welded to the end of the electric telescopic rod. A pushing plate is integrally formed at the end of the connecting plate. A convex plate is integrally formed on the surface of one of the connecting plates, and a rack is welded to the top of the convex plate.

[0016] Preferably, the rack is used to engage with the side of the toothed disc. The pushing plate is on the surface of the detection table. The connecting plates are respectively arranged on the sides of the detection table, and the surface of the connecting plate is lower than the surface of the detection table. The pushing plate is used to push the workpiece to be tested into the discharge chute.

[0017] Preferably, the material supporting component includes a central sleeve and an airbag. A rotating seat is integrally formed at the bottom of the central sleeve. Through holes are formed on the surface of the central sleeve. An outer sealing tube is integrally formed at the top of the central sleeve.

[0018] Preferably, docking holes are formed on the surface of the toothed disc. The whole rotating seat is embedded into the docking holes. An inner sealing tube is inserted into the outer sealing tube. Docking holes are formed on the surface of the inner sealing tube, and an outer exhaust port is formed at the top of the inner sealing tube.

[0019] Preferably, the outer exhaust port abuts against the surface of the breathable net after flipping. A supporting plate is integrally formed at one end of the inner sealing tube. Spring rods are inserted at the edge of the supporting plate, and the other ends of the spring rods are welded to the inner wall of the central sleeve. The air inside the airbag sequentially passes through the through holes, the inner exhaust port, the outer exhaust port, and the breathable net and then discharges towards the bottom of the detection table.

[0020] The second aspect of the present invention discloses a method for insulating detection of a voltage transformer, based on the above-mentioned current transformer appearance detection device. The detection method includes the following steps:

[0021] In the initial state, control the switching mechanism to drive the toothed disc to flip backward. The two material supporting components point vertically upward. Place the workpiece to be tested on the surface of the toothed disc and sleeved on the surfaces of the two material supporting components. Then, introduce air flow to expand the material supporting components. Start the switching mechanism and control the whole workpiece to rotate forward by 90° until the workpiece to be tested reaches the vertical state. Control the image acquisition module to take the first detection image of the workpiece to be tested at an inclined angle in the vertical state.

[0022] When the workpiece to be tested is in the vertical state, control the pushing component to move. With the meshing transmission of the toothed disc and the rack, control the workpiece to be tested to rotate 180°. At this time, change the area of the inner wall of the central through hole of the workpiece to be tested facing the image acquisition module. The image acquisition module obtains the second recognition detection image.

[0023] With the workpiece to be tested in a vertical state, start the switching mechanism to perform flipping until the workpiece to be tested is pressed onto the detection table, the air inside the material supporting component is discharged, the workpiece to be tested remains on the detection table, reverse-start the switching mechanism, flip and withdraw the gear disk from the inside of the workpiece to be tested, and use the image acquisition module to obtain the third detection image of the workpiece to be tested;

[0024] With the help of the above three groups of images, realize the appearance recognition and detection of any area on the surface and the central through-hole area of the workpiece to be tested. After the recognition is completed, start the pushing component to discharge the workpiece to be tested, and complete the appearance detection of the current transformer.

[0025] Compared with the prior art, the beneficial effects of the present invention at least include:

[0026] 1. The appearance detection device of the current transformer can quickly realize two processes of rotation and flipping through the cooperation of the switching mechanism and the material supporting component, so as to be able to change the angle range of optical recognition in a short time, and can efficiently detect and identify both sides of the current transformer and the inner wall area of the central through-hole with a single image acquisition module, improving the detection efficiency and eliminating the recognition dead angle area.

[0027] 2. After the switching mechanism rotates the material supporting mechanism, the material supporting mechanism can be inflated or deflated by controlling the rotation direction, so as to realize the effect of propping up or releasing the support for the workpiece to be tested placed inside, which can replace the clamping process realized by the fixture, shorten the cycle of the single detection process, and will not damage the surface of the workpiece to be tested, and the exhaust and inflation processes are more efficient.

[0028] 3. After the workpiece to be tested is placed on the detection table, the last image acquisition process can be completed, and at the same time, the workpiece to be tested after the detection can be directly pushed towards the rear end by the pushing component at the bottom. The whole process has high stability, and can also be applied to the detection of rectangular current transformers, realizing the appearance detection of current transformers with multiple shapes (ring-shaped, rectangular), and expanding the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic structural diagram of the appearance of an appearance detection device of a current transformer according to the present invention;

[0030] Figure 2 It is a schematic structural diagram of the support frame part of the present invention;

[0031] Figure 3 It is a structural diagram of the switching mechanism inflating the material supporting component in the present invention;

[0032] Figure 4This is the structural diagram of the switching mechanism of the present invention during the exhaust stage of the material supporting component;

[0033] Figure 5 This is the schematic structural diagram of the pushing component part of the present invention;

[0034] Figure 6 This is the exploded view of the gear disc part of the present invention;

[0035] Figure 7 This is the internal sectional view of the material supporting component of the present invention.

[0036] In the figure: 1, detection table; 2, support frame; 3, image acquisition module; 4, pushing component; 5, switching mechanism; 6, discharge chute; 7, storage box; 8, air permeable net; 9, extension bracket; 10, front end plate; 11, rear end plate; 12, air pump; 13, inflation pipeline; 14, inflation hole; 15, motor; 16, drive shaft; 17, fixed sleeve; 18, rotating arm; 19, gear disc; 20, material supporting component; 21, electric telescopic rod; 22, connecting plate; 23, push plate; 24, convex plate; 25, rack; 26, plug-in sleeve; 27, air inlet hole; 28, docking hole; 29, rotating seat; 30, central sleeve; 31, through hole; 32, airbag; 33, outer sealing tube; 34, inner sealing tube; 35, support plate; 36, spring rod; 37, outer exhaust port; 38, inner exhaust port; 39, workpiece to be measured. Specific embodiments

[0037] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments. The embodiments described in this application are only a part of the embodiments of the present invention, rather than all embodiments. Based on the spirit of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0038] Such as Figures 1 to 7As shown in the figure, Embodiment 1 of the present invention provides an appearance detection device for a current transformer, including an appearance detection device body and a workpiece 39 to be measured. The appearance detection device body includes a detection table 1, an image acquisition module 3, a pushing component 4, and a switching mechanism 5. A discharge groove 6 is formed on the surface of the detection table 1, and a storage box 7 is welded to the bottom of the discharge groove 6. The pushing component 4 is sleeved on the surface of the detection table 1. An extension bracket 9 is welded to one side of the detection table 1, and the switching mechanism 5 is inserted through the middle of the extension bracket 9. A plug sleeve 26 is inserted through the surface of the switching mechanism 5. A gear disk 19 is integrally formed at the top of the plug sleeve 26. A material supporting component 20 is inserted at the top of the gear disk 19. The number of the material supporting components 20 is two. The workpiece 39 to be measured is placed on the surface of the gear disk 19, and the two material supporting components 20 are used to pass through the central through hole of the workpiece 39 to be measured. A support frame 2 is welded to the bottom side of the storage box 7, and the image acquisition module 3 is screwed to the top of the support frame 2. The image acquisition module 3 identifies and photographs the surface of the workpiece 39 to be measured at an inclined angle. This appearance detection device for a current transformer is used to identify and detect the two sides of the current transformer to be measured and the inner wall area of the central through hole.

[0039] As Figure 1 , Figure 6 shown, when the present invention is in use, in the initial state, the switching mechanism 5 is controlled to drive the gear disk 19 to flip backward, as Figure 3 shown. At this time, the two material supporting components 20 point vertically upward. In this state, the workpiece 39 to be measured can be placed on the surface of the gear disk 19 and sleeved on the surface of the two material supporting components 20. Then, air is introduced to expand the material supporting components 20. The switching mechanism 5 is started, and the entire workpiece 39 to be measured is controlled to rotate forward by 90° until the workpiece 39 to be measured reaches a vertical state. At this time, the image acquisition module 3 can be controlled to take the first detection image of the workpiece 39 to be measured in a vertical state at an inclined angle.

[0040] Then, the pushing component 4 is controlled to move. By means of the meshing transmission between the gear disk 19 and the rack 25, the workpiece 39 to be measured is controlled to rotate by 180°. At this time, the area of the inner wall of the central through hole of the workpiece 39 to be measured facing the image acquisition module 3 is changed. Furthermore, the second recognition detection image can be obtained by means of the image acquisition module 3. Finally, the switching mechanism 5 is started again for flipping until the workpiece 39 to be measured is pressed onto the detection table 1, as Figure 4 shown.

[0041] At this time, the air inside the material supporting component 20 is automatically discharged, and the material supporting component 20 releases the supporting effect on the workpiece 39 to be measured. Reversely starting the switching mechanism 5 can only flip and extract the gear disk 19 from the inside of the workpiece 39 to be measured, and the workpiece 39 to be measured remains on the detection table 1. At this time, the image acquisition module 3 is used to obtain the third detection image of the workpiece 39 to be measured, and the appearance recognition and detection of any area on the surface and the central through-hole area of the workpiece 39 to be measured are realized by means of these three groups of images. After the recognition is completed, the pushing component 4 can be started to discharge the workpiece 39 to be measured.

[0042] As Figures 1-2 , Figure 6 shown, in this embodiment, a ventilation net 8 is laid at the middle position on the surface of the detection table 1. One end of the extension bracket 9 is integrally formed with a front end plate 10, and the other end of the extension bracket 9 is integrally formed with a rear end plate 11. An inflation hole 14 is formed on the surface of the extension bracket 9. An air pump 12 is also screwed on the surface of the extension bracket 9. One end of the air pump 12 is inserted with an inflation pipeline 13. After the inflation pipeline 13 is embedded into the extension bracket 9, it is partially communicated with the inflation hole 14. Specifically, the detection table 1 is used for placing and supporting the workpiece 39 to be measured and the final discharging process, and the inflation equipment part is supported by the extension bracket 9 on the side. Therefore, when the switching mechanism 5 flips the gear disk 19 towards the surface of the extension bracket 9, it can ensure that the intake hole 27 at the end of the plugging sleeve 26 is sleeved inside the inflation hole 14 to achieve the purpose of inflation.

[0043] As Figure 3 , Figure 6 shown, in this embodiment, the switching mechanism 5 includes a motor 15 and a rotating arm 18. The output end of the motor 15 is inserted with a driving shaft 16. A fixed sleeve 17 is welded on the surface of the driving shaft 16. A rotating arm 18 is integrally formed on the surface of the fixed sleeve 17. The end of the rotating arm 18 is penetrated with a plugging sleeve 26. An intake hole 27 is formed at the bottom of the plugging sleeve 26. The housing part of the motor 15 is fixed on the surface of the front end plate 10 with screws. The end of the driving shaft 16 is embedded into the surface of the rear end plate 11 through a bearing. The plugging sleeve 26 is partially docked with the inflation hole 14 through the intake hole 27 at the end. A one-way valve structure is installed inside the plugging sleeve 26, and the area where the plugging sleeve 26 is embedded into the rotating arm 18 is movably connected through a bearing. By cooperating the switching mechanism 5 with the material supporting component 20, the two processes of rotation and flipping can be quickly realized, so that the optical recognition angle range can be changed in a short time, and the two sides of the current transformer and the inner wall area of the central through-hole can be efficiently detected and recognized by means of a single image acquisition module 3, improving the detection efficiency and eliminating the recognition dead angle area.

[0044] AsFigure 3 , Figure 4 , Figure 6 As shown, specifically, when the switching mechanism 5 is activated, by controlling the rotation of the motor 15, the drive shaft 16 and the fixed sleeve 17 on the drive shaft 16 are driven to rotate. The fixed sleeve 17 drives the plug sleeve 26 and the gear disk 19 at the end through the rotating arm 18, so as to control the part of the plug sleeve 26 to be docked with the inflation hole 14 part when flipping backward. At this time, starting the air pump 12 can make the air flow enter the inside of the plug sleeve 26 along the inflation pipeline 13 and the inflation hole 14, and then enter the inside of the material supporting component 20 from the inside of the gear disk 19 and the docking hole 28, so that the material supporting component 20 can expand to achieve the purpose of supporting and fixing the workpiece to be measured 39 from the inside. At the same time, by also starting the motor 15, the workpiece to be measured 39 is driven to flip forward to achieve the purpose of adjusting the placement angle of the workpiece to be measured 39. Finally, it can also continue to flip forward until the workpiece to be measured 39 is horizontally placed on the surface of the detection table 1 and triggers the discharging process of the material supporting component 20 itself.

[0045] As Figure 1 , Figure 5 shown, in this embodiment, the pushing component 4 includes an electric telescopic rod 21 and a rack 25. A connecting plate 22 is welded to the end of the electric telescopic rod 21. A push plate 23 is integrally formed at the end of the connecting plate 22. A convex plate 24 is integrally formed on the surface of one of the connecting plates 22. The rack 25 is welded to the top of the convex plate 24. The rack 25 is used to mesh with the side of the gear disk 19. The push plate 23 is on the surface of the detection table 1. The connecting plates 22 are respectively arranged on the side of the detection table 1, and the surface of the connecting plate 22 is lower than the surface of the detection table 1. The push plate 23 is used to push the workpiece to be measured 39 into the inside of the discharging groove 6. After the workpiece to be measured 39 is placed on the detection table 1, the image acquisition process of the last sheet can be completed. At the same time, the workpiece to be measured 39 after being detected can be directly pushed backward by the pushing component 4 at the bottom. The whole process has high stability, and it can also be used for detecting rectangular current transformers, realizing the appearance detection of current transformers with multiple shapes (such as rectangular and annular), and expanding the scope of application.

[0046] Specifically, after starting the electric telescopic rod 21, the convex plate 24 and the push rod at the end can be controlled simultaneously. Therefore, during the process of driving the workpiece 39 to be measured to rotate to the vertical state by the above-mentioned switching mechanism 5, by extending the electric telescopic rod 21, the convex plate 24 can be moved in front of the toothed disk 19. After the toothed disk 19 and the workpiece 39 to be measured both reach the vertical state, then control the electric telescopic rod 21 to contract, and the rack 25 can be meshed with the toothed disk 19 that has been vertical. At this time, the toothed disk 19 and the internal material supporting component 20 can be driven to rotate, thereby driving the workpiece 39 to be measured that is expanded on the outside to rotate, achieving the purpose of changing the display area of the central through hole of the workpiece 39 to be measured. After the rack 25 has completely moved past, the toothed disk 19 can be controlled to rotate 180°. At this time, the convex plate 24 passes over the toothed disk 19. When the switching mechanism 5 is started again to rotate the workpiece 39 to be measured towards the detection table 1, the rotation of the toothed disk 19 can be prevented from being blocked by the convex plate 24 and the rack 25.

[0047] As Figure 7 shown in this embodiment, the material supporting component 20 includes a central sleeve 30 and an airbag 32. A rotating seat 29 is integrally formed at the bottom of the central sleeve 30. Through holes 31 are formed on the surface of the central sleeve 30. An outer layer sealing tube 33 is integrally formed at the top of the central sleeve 30. A docking hole 28 is formed on the surface of the toothed disk 19. The whole rotating seat 29 is embedded inside the docking hole 28. An inner layer sealing tube 34 is inserted inside the outer layer sealing tube 33. Docking holes 28 are formed on the surface of the inner layer sealing tube 34, and an outer layer exhaust port 37 is formed at the top of the inner layer sealing tube 34. The outer layer exhaust port 37 abuts against the surface of the breathable net 8 after being flipped. A support plate 35 is integrally formed at one end of the inner layer sealing tube 34. Spring rods 36 are inserted at the edge of the support plate 35. The other ends of the spring rods 36 are welded to the inner wall of the central sleeve 30. The air inside the airbag 32 sequentially passes through the through holes 31, the inner layer exhaust port 38, the outer layer exhaust port 37, and the breathable net 8 and then discharges towards the bottom of the detection table 1. After the material supporting mechanism is rotated by the switching mechanism 5, the material supporting mechanism can be inflated or exhausted by controlling the rotation direction, thereby realizing the effect of supporting or releasing the support for the workpiece 39 placed inside. This process can replace the clamping process realized by the fixture, shorten the cycle of the single detection process, and will not damage the surface of the workpiece 39 to be measured. The exhaust and inflation processes are more efficient.

[0048] Specifically, in the initial state, the spring rod 36 pulls the inner sealing tube 34 and the outer sealing tube 33 to be staggered. At this time, the inner exhaust port 38 is blocked by the outer sealing tube 33. Therefore, the air flow inside the central sleeve 30 cannot be discharged. And a check valve is arranged inside the bottom plug-in sleeve 26. Therefore, after the air flow is inflated into the inside of the central sleeve 30 by means of the air pump 12, only the airbag 32 can be inflated and cannot be discharged. At this time, the airbag 32 in the inflated state can be used to expand the workpiece 39 to be measured from the inner wall of the central through hole, and the image acquisition is completed. Subsequently, the workpiece 39 to be measured is rotated until the end of the material supporting assembly 20 is pressed on the detection table 1. Then, through the pressing effect, the inner sealing tube 34 can be pushed into the inside of the outer sealing tube 33, and finally the outer exhaust port 37 is communicated with the inside of the central sleeve 30. At this time, the air inside the airbag 32 can be discharged downward from the inner exhaust port 38 and the outer exhaust port 37, and the inflated airbag 32 contracts and no longer provides a supporting effect on the inner side of the workpiece 39 to be measured. Therefore, when the control switching mechanism 5 drives the gear disk 19 to reset in this state, the workpiece 39 to be measured can be left on the detection table 1 for subsequent discharge.

[0049] Embodiment 2 of the present invention discloses a method for detecting the appearance of a current transformer. Based on the above-mentioned device for detecting the appearance of a current transformer, it includes the following steps:

[0050] Step 1, in the initial state, the control switching mechanism 5 drives the gear disk 19 to flip backward. At this time, the two material supporting assemblies 20 point vertically upward. The workpiece 39 to be measured is placed on the surface of the gear disk 19 and sleeved on the surface of the two material supporting assemblies 20. Then, air flow is inflated to expand the material supporting assemblies 20, and the switching mechanism 5 is started to control the entire workpiece 39 to rotate forward by 90°. Until the workpiece 39 to be measured reaches the vertical state, at this time, the image acquisition module 3 can be controlled to take the first detection image of the workpiece 39 to be measured in the vertical state at an inclined angle.

[0051] Step 2, control the pushing assembly 4 to move. By means of the meshing transmission of the gear disk 19 and the rack 25, control the workpiece 39 to be measured to rotate 180°. At this time, the area of the inner wall of the central through hole of the workpiece 39 to be measured facing the image acquisition module 3 is changed. Furthermore, the second recognition detection image can be obtained by means of the image acquisition module 3.

[0052] Step 3, start the switching mechanism 5 and perform flipping until the workpiece 39 to be measured is pressed onto the detection table 1. At this time, the air inside the material supporting assembly 20 is automatically discharged, and the workpiece 39 to be measured is left on the detection table 1. Reverse-start the switching mechanism 5 to flip the gear disk 19 out of the inside of the workpiece 39 to be measured. Use the image acquisition module 3 to obtain the third detection image of the workpiece 39 to be measured, and realize the appearance recognition detection of any area on the surface and the central through hole area of the workpiece 39 to be measured by means of these three groups of images.

[0053] Step 4: After completion of the recognition, the pushing component 4 can be activated to discharge the workpiece 39 to be measured, thereby completing the appearance inspection of the current transformer.

[0054] Compared with the prior art, the beneficial effects of the present invention at least include:

[0055] 1. The appearance inspection device of the current transformer can quickly realize two processes of rotation and flipping through the switching mechanism in cooperation with the material supporting component, so as to be able to change the angle range of optical recognition in a short time, and can efficiently detect and identify the two sides of the current transformer and the inner wall area of the central through hole with a single image acquisition module, improving the inspection efficiency and eliminating the recognition dead angle area.

[0056] 2. After the switching mechanism rotates the material supporting mechanism of the appearance inspection device of the current transformer, the material supporting mechanism part can be inflated or exhausted by controlling the rotation direction, so as to realize the effect of supporting or releasing the support for the workpiece to be measured placed inside. This process can replace the clamping process realized by the fixture, shortening the cycle of the single inspection process, and will not cause damage to the surface of the workpiece to be measured, and the exhaust and inflation processes are more efficient.

[0057] 3. After the workpiece to be measured is placed on the inspection table, the appearance inspection device of the current transformer can complete the image acquisition process of the last sheet, and at the same time can directly push the workpiece to be measured after the inspection backward by means of the pushing component at the bottom. The whole process has high stability, and can also be used for the inspection of rectangular current transformers, expanding the scope of application.

[0058] The above shows and describes the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present invention.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the specific implementation manners of the present invention can still be modified or equivalently replaced, and any modification or equivalent replacement without departing from the spirit and scope of the present invention should be covered by the protection scope of the claims of the present invention.

Claims

1. An appearance detection device for a current transformer, comprising an appearance detection device body and a workpiece to be measured (39), characterized in that: The appearance detection device body includes a detection table (1), an image acquisition module (3), a pushing component (4) and a switching mechanism (5). A discharge groove (6) is formed on the surface of the detection table (1), and a storage box (7) is welded to the bottom of the discharge groove (6). The pushing component (4) is sleeved on the surface of the detection table (1). An extension bracket (9) is welded to one side of the detection table (1), and the switching mechanism (5) is inserted through the middle of the extension bracket (9); A plugging sleeve (26) is inserted through the surface of the switching mechanism (5). A toothed disc (19) is integrally formed at the top of the plugging sleeve (26), and a material supporting component (20) is inserted at the top of the toothed disc (19) to achieve the effect of supporting or releasing the support of the workpiece to be measured, avoiding damage to the surface of the workpiece to be measured, and improving the exhaust and inflation efficiency; The workpiece to be measured (39) is placed on the surface of the toothed disc (19), and the material supporting component (20) is used to pass through the central through hole of the workpiece to be measured (39); A support frame (2) is welded to the bottom side of the storage box (7), and an image acquisition module (3) is screwed to the top of the support frame (2). The image acquisition module (3) identifies and photographs the surface of the workpiece to be measured (39) for detecting and identifying the two sides of the current transformer and the inner wall area of the central through hole, eliminating the identification dead angle area.

2. The appearance detection device for a current transformer according to claim 1, characterized in that: A breathable net (8) is laid at the middle position of the surface of the detection table (1). A front end plate (10) is integrally formed at one end of the extension bracket (9), and a rear end plate (11) is integrally formed at the other end of the extension bracket (9). An inflation hole (14) is formed on the surface of the extension bracket (9).

3. The appearance detection device for a current transformer according to claim 2, characterized in that: An air pump (12) is also screwed to the surface of the extension bracket (9). An inflation pipe (13) is inserted at one end of the air pump (12). After the inflation pipe (13) is embedded into the extension bracket (9), it is partially communicated with the inflation hole (14).

4. The appearance detection device for a current transformer according to claim 2, characterized in that: The switching mechanism (5) includes a motor (15) and a rotating arm (18). A driving shaft (16) is inserted at the output end of the motor (15). A fixed sleeve (17) is welded to the surface of the driving shaft (16). A rotating arm (18) is integrally formed on the surface of the fixed sleeve (17). The end of the rotating arm (18) is inserted with a plugging sleeve (26), and an air inlet hole (27) is formed at the bottom of the plugging sleeve (26).

5. The appearance detection device for a current transformer according to claim 4, characterized in that: The housing part of the motor (15) is fixed to the surface of the front end plate (10) by screws. The end of the drive shaft (16) is embedded in the surface of the rear end plate (11) through a bearing. The plugging sleeve (26) is docked with the inflation hole (14) through the air inlet hole (27) at the end. A one-way valve structure is installed inside the plugging sleeve (26), and the plugging sleeve (26) is movably connected to the inner area of the rotating arm (18) through a bearing.

6. An appearance detection device for a current transformer according to claim 4, wherein: The pushing assembly (4) includes an electric telescopic rod (21) and a rack (25). A connecting plate (22) is welded to the end of the electric telescopic rod (21). A push plate (23) is integrally formed at the end of the connecting plate (22). A convex plate (24) is integrally formed on the surface of one of the connecting plates (22). The rack (25) is welded to the top of the convex plate (24).

7. An appearance detection device for a current transformer according to claim 6, wherein: The rack (25) is used to engage with the side of the gear disc (19). The push plate (23) is located on the surface of the detection table (1). The connecting plates (22) are respectively arranged on the sides of the detection table (1), and the surface of the connecting plates (22) is lower than the surface of the detection table (1). The push plate (23) is used to push the workpiece to be tested (39) into the discharge chute (6).

8. An appearance detection device for a current transformer according to claim 4, wherein: The material supporting assembly (20) includes a central sleeve (30) and an airbag (32). A rotating seat (29) is integrally formed at the bottom of the central sleeve (30). A through hole (31) is formed on the surface of the central sleeve (30). An outer layer sealing tube (33) is integrally formed at the top of the central sleeve (30).

9. An appearance detection device for a current transformer according to claim 8, wherein: A docking hole (28) is formed on the surface of the gear disc (19). The whole rotating seat (29) is embedded in the docking hole (28). An inner layer sealing tube (34) is inserted into the outer layer sealing tube (33). A docking hole (28) is formed on the surface of the inner layer sealing tube (34), and an outer layer exhaust port (37) is formed at the top of the inner layer sealing tube (34).

10. An appearance detection device for a current transformer according to claim 9, wherein: The outer layer exhaust port (37) abuts against the surface of the breathable net (8) after being flipped. A support plate (35) is integrally formed at one end of the inner layer sealing tube (34). A spring rod (36) is inserted through the edge of the support plate (35). The other end of the spring rod (36) is welded to the inner wall of the central sleeve (30). The air inside the airbag (32) is discharged towards the bottom of the detection table (1) after passing through the through hole (31), the inner layer exhaust port (38), the outer layer exhaust port (37), and the breathable net (8) in sequence.

11. A method for detecting the appearance of a current transformer, which implements a device for detecting the appearance of a current transformer according to any one of claims 1-10, characterized in that: It includes the following steps: In the initial state, control the switching mechanism (5) to drive the gear disk (19) to flip backward, the two workpiece supporting components (20) point vertically upward, place the workpiece to be tested (39) on the surface of the gear disk (19), and sleeve it on the surface of the two workpiece supporting components (20), then inject air flow to expand the workpiece supporting components (20), start the switching mechanism (5), and control the entire workpiece to be tested (39) to rotate forward by 90°, until the workpiece to be tested (39) reaches the vertical state, and control the image acquisition module (3) to take the first detection image of the workpiece to be tested (39) in the vertical state at an inclined angle; When the workpiece to be tested is in the vertical state, control the pushing component (4) to move, and by means of the meshing transmission of the gear disk (19) and the rack (25), control the workpiece to be tested (39) to rotate 180°. At this time, change the area of the inner wall of the central through hole of the workpiece to be tested (39) facing the image acquisition module (3), and the image acquisition module (3) obtains the second recognition detection image; When the workpiece to be tested is in the vertical state, start the switching mechanism (5) and turn it over until the workpiece to be tested (39) is pressed onto the detection table (1), the air inside the workpiece supporting component (20) is discharged, the workpiece to be tested (39) remains on the detection table (1), reverse-start the switching mechanism (5), and flip the gear disk (19) out of the inside of the workpiece to be tested (39), and use the image acquisition module (3) to obtain the third detection image of the workpiece to be tested (39); With the above three groups of images, realize the appearance recognition and detection of any area on the surface and the central through hole area of the workpiece to be tested (39). After the recognition is completed, start the pushing component (4) to discharge the workpiece to be tested (39), and complete the appearance detection of the current transformer.

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