An enameled wire color difference and surface defect on-line detection device and method

Abstract

The present application relates to the technical field of enameled wire, and particularly relates to an enameled wire color difference and surface defect on-line detection equipment and method, the detection equipment comprises a temporary storage mechanism arranged on a rack and used for temporarily storing the enameled wire to realize intermittent detection of the enameled wire, a cleaning mechanism arranged on the temporary storage mechanism and used for cleaning the surface of the enameled wire, and an anti-shake mechanism arranged on the rack and used for stabilizing the enameled wire to perform image acquisition, the cleaning mechanism comprises a brushing assembly arranged on the temporary storage mechanism and an adjusting assembly, the present application can intermittently detect the surface defects of the static enameled wire, reduce the influence of the wire shaking on the recognition accuracy, the image acquisition is clearer, the detection accuracy is improved, the surface of the wire can be cleaned, the subsequent detection accuracy is improved, the problems that the wire continuously transmits and is easy to shake, the detection result is not accurate, and the surface of the wire has many impurities and influences the recognition accuracy of the surface defects of the wire are solved.

Description

Technical Field

[0001] This invention relates to the field of enameled wire technology, and in particular to an online detection device and method for color difference and surface defects in enameled wire. Background Technology

[0002] Product surface quality has always been a major concern in industrial production, as it affects the commercial and usability of a product. Magnet wire is generally classified into enameled wire, wrapped wire, enameled wrapped wire, and inorganic insulated wire. Enameled magnet wire is made by coating a conductor with a suitable varnish solution, followed by solvent evaporation, varnish film curing, and cooling. The primary purpose of varnishing is insulation, but uneven coating and prominent defects can occur during the varnishing process, resulting in substandard magnet wire. Currently, the quality parameters of flat enameled magnet wire are generally inspected manually, which suffers from low accuracy and low automation. Producing products that meet both standard requirements and customer demands is not easy; it is affected by factors such as raw material quality, process parameters, production equipment, and the environment. Therefore, the quality characteristics of various enameled wires differ.

[0003] Chinese Patent Application No. 2020102412800 discloses a machine vision detection method for surface defects of flat enameled electromagnetic wire based on deep learning, including the following steps: 1. Flat enameled electromagnetic wire image acquisition: setting up a dark field environment and using a surface light source and camera installed in a specified manner to acquire images of flat enameled electromagnetic wire; 2. Flat enameled electromagnetic wire image preprocessing: using a clustering algorithm to segment the image of the area where the enameled wire is located; 3. Flat enameled electromagnetic wire defect identification: using labeled data to train a convolutional neural network, training the model for the detection system to call, and realizing the detection of surface defects of flat enameled electromagnetic wire. This invention acquires and preprocesses flat enameled electromagnetic wire images through machine vision methods, and accurately identifies surface defects of flat enameled electromagnetic wire through convolutional neural networks, which can reduce the input of manpower, reduce detection costs, and improve recognition accuracy.

[0004] However, in the continuous testing process, existing technical solutions are prone to jitter due to the continuous transmission of the wire. If the computer algorithm is not accurate, it will lead to false alarms or missed detections of unqualified wires, resulting in inaccurate test results. Furthermore, the presence of many impurities on the wire surface affects the accuracy of identifying surface defects. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing an online detection device for color difference and surface defects in enameled wire. Through the coordinated use of a temporary storage mechanism and a cleaning mechanism, it intermittently detects static surface defects in enameled wire, resulting in more stable wire, reduced impact of wire jitter on recognition accuracy, clearer image acquisition, and improved detection accuracy. It also enables surface cleaning of the wire, improving the accuracy of subsequent detection. This invention solves the problems of inaccurate detection results due to jitter during continuous wire transmission and the impact of numerous impurities on the wire surface on the accuracy of surface defect recognition.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An online detection device for color difference and surface defects of enameled wire includes an image acquisition mechanism mounted on a frame, a temporary storage mechanism disposed on the frame for temporarily storing the enameled wire to achieve intermittent detection thereon, a cleaning mechanism disposed on the temporary storage mechanism for cleaning the surface of the enameled wire, and an anti-shake mechanism disposed on the frame for stabilizing the enameled wire for image acquisition.

[0008] The cleaning mechanism includes a brushing assembly disposed on the temporary storage mechanism and an adjusting assembly disposed on the temporary storage mechanism for adjusting the brushing assembly to adapt to the tilt angle of the enameled wire during the temporary storage process.

[0009] During the process of the image acquisition mechanism detecting static enameled wire, the temporary storage mechanism temporarily stores the enameled wire that is being continuously transmitted. The brushing component cleans the temporarily stored enameled wire. The adjustment component adjusts the state of the brushing component in real time to stably clean the surface of the enameled wire. The anti-shake mechanism quickly and smoothly cleans the enameled wire located at the image acquisition mechanism. The image acquisition mechanism acquires images of the enameled wire with minimal shaking interference.

[0010] Preferably, the temporary storage mechanism includes a temporary storage tank mounted on the frame and containing cleaning fluid, two sets of guide wheels mounted on the upper port of the temporary storage tank via fixed rods, a horizontal extension rod that is lifted and lowered inside the temporary storage tank via a first slide, and a lifting wheel that is rotatably mounted on the horizontal extension rod and used to press the enameled wire between the two guide wheels into the interior of the temporary storage tank.

[0011] Preferably, the adjustment assembly includes a first U-shaped frame disposed on a fixed rod near the image acquisition mechanism, a first U-shaped frame rotatably disposed inside the first U-shaped frame, a first driving member disposed on the first U-shaped frame and used to drive the first U-shaped frame, a transmission plate hinged inside the first U-shaped frame, a second U-shaped frame disposed on the horizontal extension rod, a second U-shaped frame rotatably disposed inside the second U-shaped frame, a second driving member disposed on the second U-shaped frame and used to drive the second U-shaped frame, a guide hole opened on the transmission plate, and a sliding column disposed inside the second U-shaped frame and slidably engaged with the guide hole.

[0012] Preferably, the brushing assembly includes a cavity formed inside the transmission plate, two sets of L-shaped sliders slidably fitted inside the cavity, a first elastic element between the two L-shaped sliders, a connecting rod on the L-shaped slider with one end extending to the outside of the transmission plate, two sets of L-shaped brush plates respectively set at the ends of the connecting rods and cooperating with each other to wrap the surface of the enameled wire, two sets of transmission rods respectively hinged on the L-shaped sliders and hinged to each other by a hinge seat, a pin unit that passes through and is elastically raised and lowered inside the slide column, a groove formed in the inner wall of the guide hole and slidably fitted with the lower end of the pin unit, a clearance groove formed at the tail end of the guide hole for accommodating the upper end of the pin unit, a limiting groove formed in the groove, and a transmission block slidably fitted inside the limiting groove and connected to the hinge seat by an elastic rope to drive the two L-shaped brush plates to open.

[0013] Preferably, the anti-shake mechanism includes a tensioning component mounted on the frame for adjusting the tension of the enameled wire, and a stabilizing component mounted on the frame for stabilizing the enameled wire.

[0014] Preferably, the tensioning assembly includes two sets of drive wheels mounted on the frame for horizontally guiding the enameled wire, a frame mounted on the frame via a second slide, a tensioning wheel mounted on the frame, a receiving wheel mounted on the frame and located directly below the tensioning wheel, a hopper containing marking liquid mounted on the frame, and an automatic nozzle mounted on the frame for marking defective segments of the enameled wire.

[0015] Preferably, the stabilizing assembly includes a bidirectional lead screw that is vertically rotatably mounted on the frame, a lifting frame threaded onto the bidirectional lead screw, and a clamping frame that is mounted on the lifting frame via an elastic telescopic member and matches the enameled wire.

[0016] Preferably, the image acquisition mechanism includes two sets of cameras that are tilted and symmetrically arranged on the frame and used to acquire images of two adjacent surfaces of the enameled wire, and a diffuse light source arranged on the cameras.

[0017] Preferably, the device also includes a reel mounted on the frame for collecting the enameled wire after testing.

[0018] Another objective of this invention is to address the shortcomings of existing technologies by providing a method for producing multilayer carbon ceramic brake discs. This method achieves precise online detection of color differences and surface defects in enameled wires through the coordination of enameled wire storage, cleaning, anti-vibration, and inspection processes.

[0019] To achieve the above objectives, the present invention provides the following technical solution:

[0020] An online detection method for color difference and surface defects in enameled wire includes the following steps:

[0021] Step 1, enameled wire temporary storage process: During the intermittent detection of enameled wire, the enameled wire at the image acquisition mechanism is intermittently stationary, while the temporary storage mechanism temporarily stores the enameled wire that is continuously transmitted at the two guide wheels.

[0022] Step two, the enameled wire cleaning process: during the temporary storage of the enameled wire, the enameled wire is soaked in the cleaning solution to moisten it. During the release of the enameled wire, the surface of the enameled wire is continuously cleaned, and the brushing angle is automatically adjusted according to the tilt angle of the enameled wire.

[0023] Step 3, the enameled wire anti-shake process: First, adjust the tension of the enameled wire at the image acquisition mechanism to straighten the enameled wire, and then clamp and stabilize the enameled wire to eliminate the interference of enameled wire shaking.

[0024] Step four, the enameled wire inspection process, involves two CCD cameras working together to acquire image information from all four sides of the enameled wire under diffuse light conditions, enabling four-sided inspection. Data transmission is achieved via a full-duplex connection using the gigabit Ethernet standard. The computer system platform first preprocesses the enameled wire image, performing image denoising, enhancement, and background separation using inter-frame difference. Based on the differences in grayscale values ​​in the image, the target area of ​​the enameled wire is extracted, color difference is detected, and surface defects are identified. If defects exist in the current image, feature extraction and analysis are performed on the defects. If no defects exist, no further processing is performed, and the next frame of the original enameled wire image is directly read.

[0025] The beneficial effects of this invention are as follows:

[0026] (1) The present invention, through the combination of a temporary storage mechanism and a cleaning mechanism, on the one hand, compared with the continuous detection method, intermittent detection of static enameled wire surface defects makes the wire more stable, reduces the impact of wire shaking on recognition accuracy, and makes image acquisition clearer, thus improving detection accuracy; on the other hand, it can temporarily store the enameled wire to be detected, which facilitates intermittent pausing of wire detection, and cleans the surface of the wire during the temporary storage process, improving the accuracy of subsequent detection and preventing dust or impurities in the production process from affecting the detection results.

[0027] (2) The present invention, through the combination of the temporary storage mechanism and the adjustment component, can, on the one hand, adjust the angle of the two L-shaped brush plates in real time according to the tilt angle of the wire during the temporary storage process, so that the two L-shaped brush plates accurately wrap the surface of the wire, prevent the L-shaped brush plates from damaging the wire, and improve the stability of wire cleaning; on the other hand, it can automatically open the two L-shaped brush plates, which is convenient for rinsing the impurities collected on the L-shaped brush plates, and the two L-shaped brush plates can quickly reset to clamp and brush the surface of the wire, avoiding the wire surface from being missed.

[0028] (3) The present invention, through the cooperation of the tensioning component and the stabilizing component, can automatically adjust the tension of the wire at the image acquisition mechanism to prevent the wire from loosening and shaking, can quickly tighten the wire, facilitate the wire to be stationary and stable, and can mark the detection defects of the wire for easy subsequent re-inspection; on the other hand, it can quickly stabilize the wire, reduce the amplitude of wire shaking, reduce the impact of wire shaking on the detection results, and improve the accuracy of the detection results.

[0029] In summary, the present invention has the advantages of automatic cleaning, good anti-shake effect, and high detection accuracy. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of an online detection device for color difference and surface defects in enameled wire.

[0031] Figure 2 This is a schematic diagram of the temporary storage mechanism.

[0032] Figure 3 This is a schematic diagram of the cleaning mechanism.

[0033] Figure 4 A schematic diagram of the transmission system used by the cleaning mechanism.

[0034] Figure 5 This is a schematic diagram of the brushing assembly.

[0035] Figure 6 for Figure 5 A magnified view of a portion of point A in the middle.

[0036] Figure 7This is a schematic diagram of the pin unit.

[0037] Figure 8 This is a schematic diagram of the image stabilization mechanism.

[0038] Figure 9 for Figure 8 Top view of the structure.

[0039] Figure 10 This is a schematic diagram of the tensioning assembly.

[0040] Figure 11 A schematic diagram of the structure of the stabilizing component.

[0041] Figure 12 This is a schematic diagram of the image acquisition mechanism.

[0042] Figure 13 This is a flowchart illustrating an online detection method for color difference and surface defects in enameled wire. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0045] Example 1

[0046] like Figures 1-7As shown, this embodiment provides an online detection device for color difference and surface defects of enameled wire, including an image acquisition mechanism 5 installed on a frame 1, a temporary storage mechanism 2 installed on the frame 1 for temporarily storing the enameled wire to realize intermittent detection of it, and a cleaning mechanism 3 installed on the temporary storage mechanism 2 for cleaning the surface of the enameled wire.

[0047] The cleaning mechanism 3 includes a brushing component 31 disposed on the temporary storage mechanism 2 and an adjusting component 32 disposed on the temporary storage mechanism 2 for adjusting the brushing component 31 to adapt to the tilt angle of the enameled wire during the temporary storage process.

[0048] During the process of the image acquisition mechanism 5 detecting static enameled wire, the temporary storage mechanism 2 temporarily stores the enameled wire that is being continuously transmitted, the brushing component 31 cleans the temporarily stored enameled wire, and the adjustment component 32 adjusts the state of the brushing component 31 in real time to stably clean the surface of the enameled wire.

[0049] Furthermore, such as Figures 1-2 As shown, the temporary storage mechanism 2 includes a temporary storage tank 21 mounted on the frame 1 and containing cleaning fluid, two sets of guide wheels 23 mounted on the upper port of the temporary storage tank 21 via fixing rods 22, a horizontal extension rod 25 mounted inside the temporary storage tank 21 via a first slide table 24, and a lifting wheel 26 rotatably mounted on the horizontal extension rod 25 for pressing the enameled wire between the two guide wheels 23 into the interior of the temporary storage tank 21.

[0050] It is worth mentioning that the structure and function of the first slide 24 and the second slide 412 are existing technologies and will not be described in detail. They are only used to realize simple lifting functions.

[0051] It should be noted that the transmission speed of the enameled wire on the guide wheel 23 away from the image acquisition mechanism 5 is V1, and the transmission speed of the enameled wire at the intermittent winding image acquisition mechanism 5 is V2. V1 is continuous, and V2 is intermittent. Therefore, V2 needs to be greater than V1 to ensure that the temporarily stored enameled wire can be released in time.

[0052] Furthermore, such as Figures 3-4As shown, the adjustment assembly 32 includes a first U-shaped frame 321 disposed on a fixed rod 22 near the image acquisition mechanism 5, a first U-shaped frame 322 rotatably disposed inside the first U-shaped frame 321, a first driving member 323 disposed on the first U-shaped frame 321 and used to drive the first U-shaped frame 322, a transmission plate 324 hingedly disposed inside the first U-shaped frame 322, a second U-shaped frame 325 disposed on the horizontal extension rod 25, a second U-shaped frame 326 rotatably disposed inside the second U-shaped frame 325, a second driving member 327 disposed on the second U-shaped frame 325 and used to drive the second U-shaped frame 326, a guide hole 328 opened on the transmission plate 324, and a sliding column 329 disposed inside the second U-shaped frame 326 and slidably engaged with the guide hole 328.

[0053] It is worth mentioning that both the first drive unit 323 and the second drive unit 327 use existing stepper motors.

[0054] It should be noted that, through the cooperation of the temporary storage mechanism 2 and the adjustment component 32, on the one hand, the angle of the two L-shaped brush plates 315 can be adjusted in real time according to the tilt angle of the wire during the temporary storage process, so that the two L-shaped brush plates 315 accurately wrap the surface of the wire, preventing the L-shaped brush plates 315 from damaging the wire and improving the stability of wire cleaning; on the other hand, the two L-shaped brush plates 315 can be automatically opened to facilitate rinsing the impurities collected on the L-shaped brush plates 315, and the two L-shaped brush plates 315 can quickly reset to clamp and brush the surface of the wire, avoiding missed cleaning of the wire surface.

[0055] Furthermore, such as Figures 4-7 As shown, the brushing assembly 31 includes a cavity 311 formed inside the transmission plate 324, two sets of L-shaped sliders 312 slidably fitted inside the cavity 311, a first elastic member 313 disposed between the two L-shaped sliders 312, a connecting rod 314 disposed on the L-shaped sliders 312 with one end extending to the outside of the transmission plate 324, two sets of L-shaped brush plates 315 respectively disposed at the ends of the connecting rods 314 and cooperating with each other to wrap the surface of the enameled wire, and two sets of brush plates respectively hinged to the L-shaped sliders 312 and hinged to each other by hinge seats 316. The transmission rod 317 is connected to the slide column 329. The pin unit 318 is inserted and elastically raised and lowered inside the slide column 329. The slide groove 319 is opened in the inner wall of the guide hole 328 and slides with the lower end of the pin unit 318. The clearance groove 3191 is opened at the tail end of the guide hole 328 and is used to accommodate the upper end of the pin unit 318. The limiting groove 3192 is opened on the slide groove 319. The transmission block 3194 is slidably installed in the limiting groove 3192 and connected to the hinge seat 316 through the elastic rope 3193 to drive the two L-shaped brush plates 315 to open.

[0056] It should be noted that the pin unit 318 includes a sleeve 3181 that is elastically and vertically disposed inside the slide column 329, and a wedge rod 3183 that is slidably disposed inside the sleeve 3181 via a second elastic member 3182.

[0057] It is worth mentioning that a rinsing nozzle is provided on the inner wall of the temporary storage box 21. The rinsing nozzle rinses the two open L-shaped brush plates 315 as the transmission plate 324 rotates downward. The inner wall of the L-shaped brush plates 315 is provided with brushing cotton.

[0058] It is also worth mentioning that during the process of the lifting wheel 26 descending to temporarily store the enameled wire, the enameled wire at the image acquisition mechanism 5 is static and not being transmitted. Therefore, during the downward rotation of the transmission plate 324, the two L-shaped brush plates 315 are driven to open, which facilitates rinsing the L-shaped brush plates 315. When the enameled wire at the image acquisition mechanism 5 begins to be dynamically transmitted, the two L-shaped brush plates 315 quickly reset and brush the surface of the enameled wire.

[0059] In this embodiment, the temporary storage mechanism 2 and the cleaning mechanism 3 work together to achieve the following: Firstly, compared with continuous detection, intermittent detection of static enameled wire surface defects makes the wire more stable, reduces the impact of wire jitter on recognition accuracy, and makes image acquisition clearer, thus improving detection accuracy. Secondly, the enameled wire to be detected can be temporarily stored, which facilitates intermittent pausing of wire detection. During the temporary storage of the wire, the surface of the wire is cleaned, improving the accuracy of subsequent detection and preventing dust or impurities from affecting the detection results during the production process.

[0060] In detail, when the enameled wire at image acquisition mechanism 5 is static and not transmitting, the first slide 24 drives the lifting wheel 26 to descend via the horizontal extension rod 25. The slide column 329 drives the transmission plate 324 to rotate downward via the guide hole 328, so that the transmission plate 324 is always parallel to the wire to adapt to changes in the wire's tilt angle. At the same time, the lower end of the wedge-shaped rod 3183 of the pin unit 318 slides along the slide groove 319 and drives the transmission block 3194 to slide synchronously along the limiting groove 3192, so that the transmission block 3194 carries the elastic rope 319 3. The hinge 316 drives two transmission rods 317 to open the L-shaped slider 312. The L-shaped slider 312, through the connecting rod 314, opens two L-shaped brush plates 315 to detach from the wire surface for rinsing. Simultaneously, the first driving member 323 adjusts the tilt angle of the first U-shaped frame 322, and the second driving member 327 adjusts the tilt angle of the second U-shaped frame 326, so that the transmission plate 324 adapts to the tilt angle of the wire. When a specified length of wire is temporarily stored, the sliding column 329 moves to the clearance groove 3191 at the tail end of the guide hole 328, and the sleeve 3181... The upper end rises into the clearance groove 3191 under the action of elastic force, causing the lower end of the wedge rod 3183 to rise and disengage from the transmission block 3194. Under the action of the elastic rope 3193, the transmission block 3194 resets along the limiting groove 3192. The two L-shaped brush plates 315 quickly reset and clamp the wire surface under the action of the first elastic element 313. Then, the first slide table 24 drives the lifting wheel 26 to rise and reset through the flat extension rod 25, causing the sliding column 329 to drive the transmission plate 324 to rotate upward and reset through the guide hole 328 to adapt to the tilt angle of the wire. As the two L-shaped brush plates 315 brush steadily, the pin unit 318 of the sliding column 329 moves to the position of the transmission plate 324. At this point, the inclined surface of the lower end of the wedge rod 3183 contacts the top of the transmission plate 324. The transmission plate 324 forces the wedge rod 3183 to rise into the sleeve 3181 through the inclined surface, until the lower end of the wedge rod 3183 moves to the reset position on the other side of the transmission plate 324. At this time, the lower end of the wedge rod 3183 is lowered and reset to below the sleeve 3181 by the elastic force of the second elastic element 3182, ready for the next use.

[0061] Example 2

[0062] like Figure 1 and Figures 8-12 As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 2 and Embodiment 1 is as follows:

[0063] like Figure 1 and Figures 8-12As shown, the online testing equipment also includes an anti-shake mechanism 4 mounted on the frame 1 for stabilizing the enameled wire during image acquisition. The anti-shake mechanism 4 includes a tensioning component 41 mounted on the frame 1 for adjusting the tension of the enameled wire and a stabilizing component 42 mounted on the frame 1 for stabilizing the enameled wire.

[0064] Furthermore, such as Figures 8-10 As shown, the tensioning assembly 41 includes two sets of drive wheels 411 mounted on the frame 1 for horizontally guiding the enameled wire, a frame 413 mounted on the frame 1 via a second slide 412, a tensioning wheel 414 mounted on the frame 413, a receiving wheel 415 mounted on the frame 1 and located directly below the tensioning wheel 414, a material tank 416 mounted on the frame 413 and containing marking liquid, and an automatic nozzle 417 mounted on the frame 413 for marking defective segments of the enameled wire.

[0065] It should be noted that the marking solution in the material box 416 uses existing fluorescent agents, which facilitates the use of ultraviolet lamps to inspect wire defects.

[0066] It should also be noted that the structure and function of the automatic nozzle 417 are existing technologies and will not be described in detail here. When the image acquisition mechanism 5 detects a defect on the surface of the wire, the automatic nozzle 417 sprays the marking liquid in the material box 416 onto the surface of the wire to mark it, which is convenient for subsequent re-inspection.

[0067] Furthermore, such as Figures 11-12 As shown, the stabilizing assembly 42 includes a bidirectional lead screw 421 vertically rotatably mounted on the frame 1, a lifting frame 422 threaded onto the bidirectional lead screw 421, and a clamping frame 424 mounted on the lifting frame 422 via an elastic telescopic member 423 and matched with the enameled wire. The bidirectional lead screw 421 is driven by a third driving member, which is an existing stepper motor.

[0068] It is worth mentioning that after the two clamping frames 424 clamp and stabilize the wire, when the two clamping frames 424 leave the wire, the elastic telescopic member 423 reduces the shaking of the wire caused by the contact of the clamping frames 424, which facilitates the rapid stabilization of the wire.

[0069] In this embodiment, the tensioning component 41 and the stabilizing component 42 work together to automatically adjust the tension of the wires at the five points of the image acquisition mechanism, preventing the wires from loosening and shaking, quickly tightening the wires, facilitating the stabilization of the wires, and marking the detected defects of the wires for subsequent re-inspection. On the other hand, the wires can be stabilized quickly, reducing the amplitude of wire vibration, reducing the impact of wire vibration on the detection results, and improving the accuracy of the detection results.

[0070] In detail, when the cleaned wire is transferred to the position of the image acquisition mechanism 5, the winding reel 6 stops winding the wire, the second slide 412 drives the frame 413 to descend, causing the tensioning wheel 414 to descend and press the wire against the receiving wheel 415, so that the wire between the two transmission wheels 411 is taut. Then, the third drive unit drives the two clamping frames 424 to clamp the wire through the bidirectional lead screw 421. After the wire is stable, the two clamping frames 424 separate and reset, and the wire is ready for testing.

[0071] Example 3

[0072] like Figures 8-9 As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 2 and Embodiment 1 is as follows:

[0073] like Figures 8-9 As shown, the image acquisition mechanism 5 includes two sets of cameras 51 that are tilted and symmetrically arranged on the frame 1 and used to acquire images of two adjacent surfaces of the enameled wire respectively, and a diffuse light source 52 arranged on the camera 51.

[0074] It also includes a winding reel 6 mounted on the frame 1 for collecting the tested enameled wire, the winding reel 6 being driven by an existing power source to automatically wind up the wire.

[0075] It is worth mentioning that the two CCD cameras 51 work together to acquire image information of the four sides of the enameled wire in a diffuse light environment, thereby realizing the four-sided detection of the enameled wire.

[0076] Example 4

[0077] like Figure 13 As shown, this embodiment provides an online detection method for color difference and surface defects in enameled wire, including the following steps:

[0078] Step 1, enameled wire temporary storage process: During the intermittent detection of enameled wire, the enameled wire at the image acquisition mechanism 5 is intermittently stationary, while the temporary storage mechanism 2 performs temporary storage processing on the enameled wire continuously transmitted at the two guide wheels 23.

[0079] Step two, the enameled wire cleaning process: during the temporary storage of the enameled wire, the enameled wire is soaked in the cleaning solution to moisten it. During the release of the enameled wire, the surface of the enameled wire is continuously cleaned, and the brushing angle is automatically adjusted according to the tilt angle of the enameled wire.

[0080] Step 3, the anti-shake process of the enameled wire: First, adjust the tension of the enameled wire at point 5 of the image acquisition mechanism to straighten the enameled wire, and then clamp and stabilize the enameled wire to eliminate the interference of the enameled wire shaking.

[0081] Step four, the enameled wire inspection process: Two CCD cameras 51 work together to acquire image information of the four sides of the enameled wire under diffuse light, realizing four-sided inspection of the enameled wire. The data transmission is achieved through a full-duplex connection of the switch using the gigabit Ethernet standard. The computer system platform first preprocesses the enameled wire image, including image denoising, enhancement processing, and separation of the background of the enameled wire using the inter-frame difference method. The target area of ​​the enameled wire is extracted based on the difference in gray values ​​in the image, color difference is detected, and then surface defects of the enameled wire are identified. If there are defects in the current image, the defects in the image are feature extracted and analyzed. If there are no defects in the current image, no further processing is performed on the image, and the next frame of the original enameled wire image is directly read.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An online detection device for color difference and surface defects of enameled wire, comprising an image acquisition mechanism (5) mounted on a frame (1), characterized in that, It also includes a temporary storage mechanism (2) set on the frame (1) for temporarily storing the enameled wire to achieve intermittent detection of it, a cleaning mechanism (3) set on the temporary storage mechanism (2) for cleaning the surface of the enameled wire, and an anti-shake mechanism (4) set on the frame (1) for stabilizing the enameled wire for image acquisition. The cleaning mechanism (3) includes a brushing assembly (31) disposed on the temporary storage mechanism (2) and an adjustment assembly (32) disposed on the temporary storage mechanism (2) for adjusting the brushing assembly (31) to adapt to the tilt angle of the enameled wire during the temporary storage process. During the process of the image acquisition mechanism (5) detecting static enameled wire, the temporary storage mechanism (2) temporarily stores the enameled wire that is being continuously transmitted, the brushing component (31) cleans the temporarily stored enameled wire, the adjustment component (32) adjusts the state of the brushing component (31) in real time to stably clean the surface of the enameled wire, the anti-shake mechanism (4) quickly and smoothly cleans the enameled wire located at the image acquisition mechanism (5), and the image acquisition mechanism (5) acquires images of enameled wire with small shaking interference. The temporary storage mechanism (2) includes a temporary storage tank (21) installed on the frame (1) and containing cleaning fluid, two sets of guide wheels (23) installed on the upper port of the temporary storage tank (21) via a fixing rod (22), a horizontal extension rod (25) that is raised and lowered inside the temporary storage tank (21) via a first slide (24), and a lifting wheel (26) that is rotatably installed on the horizontal extension rod (25) and used to press the enameled wire between the two guide wheels (23) into the interior of the temporary storage tank (21). The adjustment assembly (32) includes a first U-shaped frame (321) disposed on a fixed rod (22) near the image acquisition mechanism (5), a first U-shaped frame (322) rotatably disposed inside the first U-shaped frame (321), a first driving member (323) disposed on the first U-shaped frame (321) and used to drive the first U-shaped frame (322), a transmission plate (324) hingedly disposed inside the first U-shaped frame (322), a second U-shaped frame (325) disposed on the horizontal extension rod (25), a second U-shaped frame (326) rotatably disposed inside the second U-shaped frame (325), a second driving member (327) disposed on the second U-shaped frame (325) and used to drive the second U-shaped frame (326), a guide hole (328) opened on the transmission plate (324), and a sliding column (329) disposed inside the second U-shaped frame (326) and slidingly engaged with the guide hole (328). The brushing assembly (31) includes a cavity (311) formed inside the transmission plate (324), two sets of L-shaped sliders (312) slidably fitted inside the cavity (311), a first elastic member (313) between the two L-shaped sliders (312), a connecting rod (314) mounted on the L-shaped sliders (312) with one end extending to the outside of the transmission plate (324), two sets of L-shaped brush plates (315) respectively mounted at the ends of the connecting rods (314) and cooperating with each other to wrap the surface of the enameled wire, and two sets of transmission plates respectively hinged on the L-shaped sliders (312) and hinged to each other by hinge seats (316). The rod (317), the pin unit (318) that is through and elastically raised and lowered inside the slide column (329), the slide groove (319) that is opened on the inner wall of the guide hole (328) and slides with the lower end of the pin unit (318), the clearance groove (3191) that is opened at the tail end of the guide hole (328) and is used to accommodate the upper end of the pin unit (318), the limiting groove (3192) opened on the slide groove (319), and the transmission block (3194) that is slidably installed inside the limiting groove (3192) and connected to the hinge seat (316) by the elastic rope (3193) to drive the two L-shaped brush plates (315) to open.

2. The online detection device for color difference and surface defects of enameled wire according to claim 1, characterized in that, The anti-shake mechanism (4) includes a tensioning component (41) mounted on the frame (1) for adjusting the tension of the enameled wire and a stabilizing component (42) mounted on the frame (1) for stabilizing the enameled wire.

3. The online detection device for color difference and surface defects of enameled wire according to claim 2, characterized in that, The tensioning assembly (41) includes two sets of drive wheels (411) mounted on the frame (1) for horizontally guiding the enameled wire, a frame (413) mounted on the frame (1) via a second slide (412), a tensioning wheel (414) mounted on the frame (413), a receiving wheel (415) mounted on the frame (1) and located directly below the tensioning wheel (414), a material box (416) mounted on the frame (413) and containing marking liquid, and an automatic nozzle (417) mounted on the frame (413) for marking defective segments of the enameled wire.

4. The online detection device for color difference and surface defects of enameled wire according to claim 2, characterized in that, The stabilizing assembly (42) includes a bidirectional lead screw (421) that is vertically rotatably mounted on the frame (1), a lifting frame (422) that is threaded onto the bidirectional lead screw (421), and a clamping frame (424) that is mounted on the lifting frame (422) via an elastic telescopic member (423) and matches the enameled wire.

5. The online detection device for color difference and surface defects of enameled wire according to claim 1, characterized in that, The image acquisition mechanism (5) includes two sets of cameras (51) that are tilted and symmetrically arranged on the frame (1) and used to acquire images of two adjacent surfaces of the enameled wire respectively, and a diffuse light source (52) arranged on the camera (51).

6. The online detection device for color difference and surface defects of enameled wire according to claim 1, characterized in that, It also includes a reel (6) mounted on the frame (1) for collecting the enameled wire after testing.

7. An online detection method for color difference and surface defects of enameled wire, applied to an online detection device for color difference and surface defects of enameled wire as described in any one of claims 1-6, characterized in that, Includes the following steps: Step 1, enameled wire temporary storage process: During the intermittent detection of enameled wire, the enameled wire at the image acquisition mechanism (5) is intermittently stationary, while the temporary storage mechanism (2) performs temporary storage processing on the enameled wire continuously transmitted at the two guide wheels (23). Step two, the enameled wire cleaning process: during the temporary storage of the enameled wire, the enameled wire is soaked in the cleaning solution to moisten it. During the release of the enameled wire, the surface of the enameled wire is continuously cleaned, and the brushing angle is automatically adjusted according to the tilt angle of the enameled wire. Step 3, the anti-shake process of the enameled wire: First, adjust the tension of the enameled wire at the image acquisition mechanism (5) to straighten the enameled wire, and then clamp and stabilize the enameled wire to eliminate the interference of the enameled wire shaking. Step four, the enameled wire inspection process, two CCD cameras (51) work together to collect image information of the four sides of the enameled wire in a diffuse light environment and identify defects.

Images