Enameled wire chromatic aberration and surface defect on-line detection equipment and method

Abstract

The invention relates to the technical field of enamelled wires, in particular to an enamelled wire chromatic aberration and surface defect online detection device and method. The detection equipment comprises a temporary storage mechanism, a cleaning mechanism and an anti-shake mechanism, wherein the temporary storage mechanism is arranged on a rack and is used for temporarily storing an enameled wire to realize intermittent detection of the enameled wire; the cleaning mechanism is arranged on the temporary storage mechanism and is used for cleaning the surface of the enameled wire; the anti-shake mechanism is arranged on the rack and is used for stabilizing the enameled wire and acquiring an image; the cleaning mechanism comprises a brushing assembly and an adjusting assembly which are arranged on the temporary storage mechanism. Static enamelled wire surface defects can be intermittently detected, the influence of wire shaking on the recognition precision is reduced, image acquisition is clearer, the detection accuracy is improved, the surface of a wire can be cleaned, the subsequent detection precision is improved, and the detection efficiency is improved. The problems that the continuous transmission of the wire rod is easy to shake, the detection result is inaccurate, the surface of the wire rod has more impurities, and the recognition precision of the surface defect of the wire rod is influenced are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of enameled wires, and particularly to an on-line detection device and method for color difference and surface defects of enameled wires. Background Art

[0002] Surface quality problems of products have always been the main issues concerned in industrial production, and the surface quality of products will affect their commercial value and use value. Electromagnetic wires are usually divided into enameled wires, covered wires, enameled covered wires, and inorganic insulated wires. Among them, enameled electromagnetic wires are made by coating a corresponding paint solution on a conductor, followed by solvent evaporation, film curing, and cooling. The main purpose of painting is insulation, but problems such as uneven coating and protruding defects may occur during the painting process of electromagnetic wires, resulting in unqualified electromagnetic wires. The quality parameter detection of existing flat enameled electromagnetic wires is generally manual, with the disadvantages of low detection accuracy and low automation. It is not easy to produce products that meet both standard requirements and customer requirements, as they are affected by factors such as raw material quality, process parameters, production equipment, and environment. Therefore, the quality characteristics of various enameled wires are different.

[0003] Chinese Patent Application No. 2020102412800 discloses a machine vision detection method for surface defects of flat enameled electromagnetic wires based on deep learning, including the steps of: 1. Image acquisition of flat enameled electromagnetic wires: building a dark field environment and using a surface light source and a camera installed in a specified manner to acquire images of flat enameled electromagnetic wires; 2. Image preprocessing of flat enameled electromagnetic wires: using a clustering algorithm to segment the image of the area where the enameled wire is located; 3. Defect identification of flat enameled electromagnetic wires: training a convolutional neural network with labeled data, and training the model for the detection system to call to achieve the detection of surface defects of flat enameled electromagnetic wires. The present invention collects and preprocesses images of flat enameled electromagnetic wires through machine vision methods, and accurately identifies surface defects of flat enameled electromagnetic wires through a convolutional neural network, which can reduce the input of manpower, lower the detection cost, and improve the identification accuracy.

[0004] However, in the existing technical solutions during the continuous detection process, the wire is prone to jitter during continuous transmission. When using computer algorithms to perform jitter elimination processing on the collected wire images, if the algorithms are inaccurate, it will lead to false alarms or missed reports of unqualified wires, and the detection results are not accurate; moreover, there are many impurities on the wire surface, which affects the identification accuracy of wire surface defects. Summary of the Invention

[0005] The object of the present invention is to address the deficiencies of the prior art and provide an on-line detection device for the color difference and surface defects of enameled wires. Through the cooperation of the provided temporary storage mechanism and cleaning mechanism, the surface defects of static enameled wires are detected intermittently, the wire is more stable, the influence of wire jitter on the recognition accuracy is reduced, the image acquisition is clearer, the detection accuracy is improved, the surface of the wire can be cleaned, and the subsequent detection accuracy is improved, solving the problems that the wire is prone to jitter during continuous transmission, the detection result is inaccurate, and there are many impurities on the surface of the wire, affecting the recognition accuracy of the surface defects of the wire.

[0006] To achieve the above object, the present invention provides the following technical solutions: An on-line detection device for the color difference and surface defects of enameled wires, including an image acquisition mechanism installed on a frame, and further including a temporary storage mechanism provided on the frame for temporarily storing enameled wires to achieve intermittent detection thereof, a cleaning mechanism provided on the temporary storage mechanism for cleaning the surface of the enameled wires, and an anti-shake mechanism provided on the frame for stabilizing the enameled wires for image acquisition; The cleaning mechanism includes a brushing assembly provided on the temporary storage mechanism and an adjusting assembly provided on the temporary storage mechanism for adjusting the brushing assembly to adapt to the inclination angle of the enameled wire during the process of temporarily storing the enameled wire; During the process of the image acquisition mechanism detecting static enameled wires, the temporary storage mechanism temporarily stores the continuously transmitted enameled wires, the brushing assembly cleans the temporarily stored enameled wires, the adjusting assembly adjusts the state of the brushing assembly in real time to stably clean the surface of the enameled wire, the anti-shake mechanism quickly stabilizes the enameled wire at the image acquisition mechanism, and the image acquisition mechanism acquires the image of the enameled wire with little jitter interference.

[0007] Preferably, the temporary storage mechanism includes a temporary storage box provided on the frame and filled with cleaning liquid, two guiding wheels provided on the upper port of the temporary storage box through fixed rods, a flat extension rod lifted and lowered through a first slide on the inside of the temporary storage box, and a lifting wheel rotatably provided on the flat extension rod and used for pressing the enameled wire between the two guiding wheels into the temporary storage box.

[0008] Preferably, the adjusting assembly includes a first U-shaped frame provided on one of the fixed rods close to the image acquisition mechanism, a first U-shaped frame rotatably provided inside the first U-shaped frame, a first driving member provided on the first U-shaped frame and used for driving the first U-shaped frame, a transmission plate hinged inside the first U-shaped frame, a second U-shaped frame provided on the flat extension rod, a second U-shaped frame rotatably provided inside the second U-shaped frame, a second driving member provided on the second U-shaped frame and used for driving the second U-shaped frame, a guiding hole opened on the transmission plate, and a sliding column provided inside the second U-shaped frame and slidably matched with the guiding hole.

[0009] Preferably, the brushing assembly includes a cavity formed inside the drive plate, two L-shaped sliders slidably fitted inside the cavity, a first elastic member disposed between the two L-shaped sliders, a connecting rod disposed on the L-shaped slider and having one end penetrating to the outside of the drive plate, two L-shaped brush plates respectively disposed at the ends of the connecting rod and cooperating to wrap the surface of the enameled wire, two transmission rods respectively hingedly disposed on the L-shaped sliders and hinged to each other through a hinge seat, a pin unit elastically lifted and lowered through the inside of the sliding column, a chute formed on the inner wall of the guiding hole and slidably fitted with the lower end of the pin unit, an avoidance groove formed at the end of the guiding hole for accommodating the upper end of the pin unit, a limiting groove formed on the chute, and a transmission block slidably fitted inside the limiting groove and connected to the hinge seat through an elastic cord to drive the two L-shaped brush plates to open.

[0010] Preferably, the anti-shake mechanism includes a tensioning assembly disposed on the frame for adjusting the tension of the enameled wire and a stabilizing assembly disposed on the frame for stabilizing the enameled wire.

[0011] Preferably, the tensioning assembly includes two transmission wheels disposed on the frame for horizontally guiding the enameled wire, a frame lifted and lowered through a second sliding table on the frame, a tensioning wheel disposed on the frame, a receiving wheel disposed on the frame and located directly below the tensioning wheel, a material box containing a marking liquid disposed on the frame, and an automatic spray head disposed on the frame for marking the defective segments of the enameled wire.

[0012] Preferably, the stabilizing assembly includes a bidirectional lead screw vertically rotatably disposed on the frame, a lifting frame threadedly disposed on the bidirectional lead screw, and a clamping strip frame disposed on the lifting frame through an elastic telescopic member and matching the enameled wire.

[0013] Preferably, the image acquisition mechanism includes two cameras inclined and symmetrically disposed on the frame for respectively acquiring two adjacent surfaces of the enameled wire and a diffused light source disposed on the cameras.

[0014] Preferably, it further includes a coiling reel disposed on the frame for collecting the enameled wire after detection.

[0015] Another object of the present invention is to provide a production method for a multi-layer carbon-ceramic brake disc in view of the deficiencies of the prior art. Through the cooperation of the enameled wire temporary storage process, the enameled wire cleaning process, the enameled wire anti-shake process, and the enameled wire detection process, the effect of accurately detecting the color difference and surface defects of the enameled wire online is achieved.

[0016] To achieve the above object, the present invention provides the following technical solutions: An on-line detection method for the color difference and surface defects of enameled wires, comprising the following steps: Step 1, the enameled wire temporary storage process. During the intermittent detection of the enameled wire, the enameled wire at the image acquisition mechanism is intermittently stationary, while the temporary storage mechanism temporarily stores the continuously transmitted enameled wire at the two guide wheels. Step 2, the enameled wire cleaning process. During the temporary storage of the enameled wire, the enameled wire is soaked in the cleaning liquid to be wetted. 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 inclination angle of the enameled wire. Step 3, the enameled wire anti-vibration process. First, the tension of the enameled wire at the image acquisition mechanism is adjusted to make the enameled wire straight, and then the enameled wire is clamped and stabilized to eliminate the interference of the enameled wire vibration. Step 4, the enameled wire detection process. Two CCD cameras cooperate to collect the image information of four surfaces of the enameled wire in an environment of diffuse reflection light to realize the four-sided detection of the enameled wire. The gigabit Ethernet standard is adopted, and data transmission is realized through the full-duplex connection of the switch. The computer system platform first preprocesses the enameled wire image, performs image denoising, enhancement processing, and separates the background of the enameled wire by 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 to detect the color difference, and then the surface defects of the enameled wire are identified. If there are defects in the current image, the features of the defects in the image are extracted and analyzed. If there are no defects in the current image, no subsequent processing is performed on the image, and the next frame of the original enameled wire image is directly read.

[0017] The beneficial effects of the present invention are as follows: (1) Through the cooperation of the temporary storage mechanism and the cleaning mechanism set in the present invention, on the one hand, compared with the continuous detection method, the surface defects of the static enameled wire are detected intermittently, the wire is more stable, the influence of wire shaking on the recognition accuracy is reduced, the image acquisition is clearer, and the detection accuracy is improved; on the other hand, the enameled wire to be detected can be temporarily stored, which is convenient for intermittently pausing the wire for detection, and during the temporary storage process of the wire, the surface of the wire is cleaned, the subsequent detection accuracy is improved, and the influence of dust or impurities on the detection result during the production process is prevented.

[0018] (2) Through the cooperation of the temporary storage mechanism and the adjustment component set in the present invention, on the one hand, during the temporary storage process of the wire, the angles of the two L-shaped brush plates can be adjusted in real time according to the inclination angle of the wire, so that the two L-shaped brush plates accurately wrap the surface of the wire, preventing the L-shaped brush plates from damaging the wire and improving the stability of wire cleaning; on the other hand, the two L-shaped brush plates can be automatically opened to facilitate flushing 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 missed washing of the wire surface.

[0019] (3) By cooperating with the tensioning component and the stabilizing component provided in the present invention, on the one hand, it can automatically adjust the tension of the wire at the image acquisition mechanism, prevent the wire from loosening and shaking, quickly tighten the wire, facilitate the wire to be stationary and stable, and can mark the defective part of the wire for subsequent re-inspection; on the other hand, it can quickly and stably fix the wire, reduce the amplitude of wire shaking, reduce the influence of wire shaking on the detection result, and improve the accuracy of the detection result.

[0020] In summary, the present invention has the advantages of automatic cleaning, good anti-shake effect, high detection accuracy, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of an on-line detection device for the color difference and surface defects of enameled wires.

[0022] Figure 2 It is a schematic structural diagram of the temporary storage mechanism.

[0023] Figure 3 It is a schematic structural diagram of the cleaning mechanism.

[0024] Figure 4 It is a transmission schematic diagram of the cleaning mechanism working.

[0025] Figure 5 It is a schematic structural diagram of the brushing component.

[0026] Figure 6 For Figure 5 The partial enlarged view at position A in

[0027] Figure 7 It is a schematic structural diagram of the plug unit.

[0028] Figure 8 It is a schematic structural diagram of the anti-shake mechanism.

[0029] Figure 9 For Figure 8 The structural top view of

[0030] Figure 10 It is a schematic structural diagram of the tensioning component.

[0031] Figure 11 It is a schematic structural diagram of the stabilizing component.

[0032] Figure 12 It is a schematic structural diagram of the image acquisition mechanism.

[0033] Figure 13 It is a schematic flow diagram of an on-line detection method for the color difference and surface defects of enameled wires. DETAILED DESCRIPTION OF THE INVENTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0036] Embodiment 1 As Figures 1-7 shown, this embodiment provides an on-line detection device for the color difference and surface defects of enameled wires, which includes an image acquisition mechanism 5 installed on a frame 1, and further includes a temporary storage mechanism 2 arranged on the frame 1 for temporarily storing enameled wires to realize intermittent detection thereof, and a cleaning mechanism 3 arranged on the temporary storage mechanism 2 for cleaning the surface of enameled wires. The cleaning mechanism 3 includes a brushing assembly 31 arranged on the temporary storage mechanism 2 and an adjusting assembly 32 arranged on the temporary storage mechanism 2 for adjusting the brushing assembly 31 to adapt to the inclination angle of the enameled wire during the process of temporarily storing the enameled wire. During the process of the image acquisition mechanism 5 detecting static enameled wires, the temporary storage mechanism 2 temporarily stores the continuously transmitted enameled wires, the brushing assembly 31 cleans the temporarily stored enameled wires, and the adjusting assembly 32 adjusts the state of the brushing assembly 31 in real time to stably clean the surface of the enameled wire.

[0037] Furthermore, as Figures 1-2As shown, the temporary storage mechanism 2 includes a temporary storage box 21 provided on the frame 1 and filled with cleaning liquid inside, two groups of guide wheels 23 provided at the upper port of the temporary storage box 21 through fixing rods 22, a flat extension rod 25 lifted and lowered inside the temporary storage box 21 through a first sliding table 24, and a lifting wheel 26 rotatably provided on the flat extension rod 25 and used to press the enameled wire between the two guide wheels 23 into the temporary storage box 21.

[0038] It is worth mentioning that the structures and functions of the first sliding table 24 and the second sliding table 412 are both prior arts and will not be elaborated here. They are only used to achieve simple lifting functions.

[0039] It should be noted that the transmission speed of the enameled wire on one of the guide wheels 23 far 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.

[0040] Furthermore, as Figures 3-4 shown, the adjusting assembly 32 includes a first U-shaped frame 321 provided on one of the fixing rods 22 close to the image acquisition mechanism 5, a first U-shaped frame 322 rotatably provided inside the first U-shaped frame 321, a first driving member 323 provided on the first U-shaped frame 321 and used to drive the first U-shaped frame 322, a transmission plate 324 hinged inside the first U-shaped frame 322, a second U-shaped frame 325 provided on the flat extension rod 25, a second U-shaped frame 326 rotatably provided inside the second U-shaped frame 325, a second driving member 327 provided on the second U-shaped frame 325 and used to drive the second U-shaped frame 326, a guiding hole 328 opened on the transmission plate 324, and a sliding column 329 provided inside the second U-shaped frame 326 and slidably matched with the guiding hole 328.

[0041] It is worth mentioning that both the first driving member 323 and the second driving member 327 adopt existing stepping motors.

[0042] It should be noted that through the cooperation of the temporary storage mechanism 2 and the adjusting assembly 32, on the one hand, during the process of temporarily storing the wire, the angles of the two L-shaped brush plates 315 can be adjusted in real time according to the inclination angle of the wire, 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 flushing 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 washing of the wire surface.

[0043] Furthermore, as Figures 4-7As shown in the figure, the brushing assembly 31 includes a cavity 311 formed inside the drive plate 324, two groups of L-shaped sliders 312 slidably arranged inside the cavity 311, a first elastic member 313 arranged between the two L-shaped sliders 312, a connecting rod 314 arranged on the L-shaped slider 312 and having one end penetrating to the outside of the drive plate 324, two groups of L-shaped brush plates 315 respectively arranged at the ends of the connecting rod 314 and cooperating with each other to wrap the surface of the enameled wire, two groups of transmission rods 317 respectively hinged on the L-shaped sliders 312 and hinged to each other through a hinge seat 316, a pin unit 318 elastically lifted and lowered through the inside of the sliding column 329, a chute 319 formed on the inner wall of the guiding hole 328 and slidably cooperating with the lower end of the pin unit 318, an avoidance groove 3191 formed at the end of the guiding hole 328 for accommodating the upper end of the pin unit 318, a limiting groove 3192 formed on the chute 319, and a transmission block 3194 slidably arranged inside the limiting groove 3192 and connected to the hinge seat 316 through an elastic cord 3193 to drive the two L-shaped brush plates 315 to open.

[0044] It should be noted that the pin unit 318 includes a sleeve 3181 elastically lifted and lowered through the inside of the sliding column 329, and a wedge-shaped rod 3183 slidably arranged inside the sleeve 3181 through a second elastic member 3182.

[0045] It is worth mentioning that a flushing nozzle is arranged on the inner side wall of the temporary storage box 21. During the downward rotation of the drive plate 324, the opened two L-shaped brush plates 315 are flushed, and brushing cotton is arranged on the inner wall of the L-shaped brush plate 315.

[0046] 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 transmitted. Therefore, during the downward rotation of the drive plate 324, the two L-shaped brush plates 315 are driven to open, facilitating the flushing of the L-shaped brush plates 315. When the enameled wire at the image acquisition mechanism 5 starts to be dynamically transmitted, the two L-shaped brush plates 315 quickly reset to brush the surface of the enameled wire.

[0047] In this embodiment, through the cooperation of the temporary storage mechanism 2 and the cleaning mechanism 3, on the one hand, compared with the continuous detection method, the intermittent detection of the static surface defects of the enameled wire makes the wire more stable, reduces the influence of wire jitter on the recognition accuracy, makes the image acquisition clearer, and improves the detection accuracy; on the other hand, it can temporarily store the enameled wire to be detected, facilitating the intermittent suspension of the wire for detection, and during the process of temporarily storing the wire, cleaning the surface of the wire, improving the subsequent detection accuracy, and preventing dust or impurities from affecting the detection result during the production process.

[0048] Specifically, when the enameled wire at the image acquisition mechanism 5 is static and not transmitting, the first sliding table 24 drives the lifting wheel 26 to descend through the horizontal extension rod 25. The sliding column 329 drives the transmission plate 324 to rotate downward through the guiding hole 328, so that the transmission plate 324 is always parallel to the wire to adapt to the change of the inclination angle of the wire. At the same time, the lower end of the wedge-shaped rod 3183 of the pin unit 318 slides along the sliding groove 319 and drives the transmission block 3194 to slide synchronously along the limiting groove 3192, so that the transmission block 3194 drives the elastic rope 3193 to drive the two transmission rods 317 through the hinge seat 316 to open the L-shaped slider 312. The L-shaped slider 312 drives the two L-shaped brush plates 315 to separate from the surface of the wire through the connecting rod 314 for flushing. At the same time, the first driving member 323 adjusts the inclination angle of the first U-shaped frame 322, and the second driving member 327 adjusts the inclination angle of the second U-shaped frame 326, so that the transmission plate 324 adapts to the inclination angle of the wire. When storing a specified length of wire, the sliding column 329 moves to the avoidance groove 3191 at the end of the guiding hole 328. The upper end of the sleeve 3181 rises into the avoidance groove 3191 under the action of elastic force, so that the lower end of the wedge-shaped rod 3183 rises away from the transmission block 3194. The transmission block 3194 resets along the limiting groove 3192 under the action of the elastic rope 3193. The two L-shaped brush plates 315 quickly reset under the action of the first elastic member 313 to clamp the surface of the wire. Then, the first sliding table 24 drives the lifting wheel 26 to rise and reset through the horizontal extension rod 25, so that the sliding column 329 drives the transmission plate 324 to rotate upward and reset through the guiding hole 328 to adapt to the change of the inclination angle of the wire. The two L-shaped brush plates 315 are stable in brushing. Until the pin unit 318 of the sliding column 329 moves to the position of the transmission plate 324, the inclined surface at the lower end of the wedge-shaped rod 3183 contacts the top of the transmission plate 324. The transmission plate 324 forces the wedge-shaped rod 3183 to rise into the sleeve 3181 through the inclined surface until the lower end of the wedge-shaped 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-shaped rod 3183 is reset downward under the elastic force of the second elastic member 3182 to the lower part of the sleeve 3181 for the next use.

[0049] Embodiment 2 As Figure 1 and Figures 8-12 shown, where the same or corresponding components as those in Embodiment 1 are labeled with the corresponding reference numerals in Embodiment 1. For the sake of simplicity, only the differences from Embodiment 1 will be described below. The difference between this Embodiment 2 and Embodiment 1 is as follows: As Figure 1 and Figures 8-12As shown in the figure, the online detection device further includes an anti-shake mechanism 4 disposed on the frame 1 and used for stabilizing the enameled wire for image acquisition. The anti-shake mechanism 4 includes a tensioning assembly 41 disposed on the frame 1 and used for adjusting the tension degree of the enameled wire, and a stabilizing assembly 42 disposed on the frame 1 and used for stabilizing the enameled wire.

[0050] Furthermore, as Figures 8-10 shown, the tensioning assembly 41 includes two sets of driving wheels 411 disposed on the frame 1 and used for horizontally guiding the enameled wire, a frame 413 disposed on the frame 1 by lifting through a second sliding table 412, a tensioning wheel 414 disposed on the frame 413, a receiving wheel 415 disposed on the frame 1 and located directly below the tensioning wheel 414, a material box 416 disposed on the frame 413 and filled with a marking liquid, and an automatic spray head 417 disposed on the frame 413 and used for marking the defective section of the enameled wire.

[0051] It should be noted that the marking liquid in the material box 416 uses an existing fluorescent agent, which is convenient for rechecking the defective parts of the wire using an ultraviolet lamp.

[0052] It should also be noted that the structure and function of the automatic spray head 417 are both existing technologies and will not be elaborated here. When the image acquisition mechanism 5 detects a defect on the surface of the wire, the automatic spray head 417 sprays the marking liquid in the material box 416 onto the surface of the wire for marking, which is convenient for subsequent rechecking.

[0053] Furthermore, as Figures 11-12 shown, the stabilizing assembly 42 includes a bidirectional lead screw 421 rotatably disposed vertically on the frame 1, a lifting frame 422 threadedly disposed on the bidirectional lead screw 421, and a clamping strip frame 424 disposed on the lifting frame 422 through an elastic telescopic member 423 and matched with the enameled wire. The bidirectional lead screw 421 is driven by a third driving member, and the third driving member is an existing stepping motor.

[0054] It is worth mentioning that after the two clamping strip frames 424 clamp and stabilize the wire, when the two clamping strip frames 424 leave the wire, the elastic telescopic member 423 reduces the jitter generated by the wire when it comes into contact with the clamping strip frames 424, which is convenient for the wire to quickly stabilize.

[0055] In this embodiment, through the cooperation of the tensioning assembly 41 and the stabilizing assembly 42, on the one hand, it can automatically adjust the tension degree of the wire at the image acquisition mechanism 5, prevent the wire from loosening and shaking, quickly tighten the wire, facilitate the wire to be stationary and stable, and can mark the defective parts of the wire for convenient subsequent rechecking and processing; on the other hand, it can quickly stabilize the wire, reduce the amplitude of wire jitter, reduce the influence of wire jitter on the detection result, and improve the accuracy of the detection result.

[0056] Specifically, when the cleaned wire is transmitted to the position of the image acquisition mechanism 5, the coiling reel 6 stops coiling the wire, and the second sliding table 412 drives the frame 413 to descend, causing the tensioning wheel 414 to descend and press the wire against the receiving wheel 415, making the wire between the two driving wheels 411 taut. Then, the third driving member drives the two clamping strip frames 424 to clamp the wire through the bidirectional lead screw 421. After the wire is stable, the two clamping strip frames 424 separate and reset, and the wire is ready for detection.

[0057] Embodiment Three As Figures 8-9 shown, the same or corresponding components as those in Embodiment One are denoted by the corresponding reference numerals in Embodiment One. For the sake of simplicity, only the differences from Embodiment One will be described below. The difference between this Embodiment Two and Embodiment One lies in: As Figures 8-9 shown, the image acquisition mechanism 5 includes two groups of cameras 51 that are inclined and symmetrically arranged on the frame 1 and are used to respectively collect images of two adjacent surfaces of the enameled wire, and a diffused light source 52 arranged on the cameras 51; It further includes a coiling reel 6 arranged on the frame 1 and used to collect the enameled wire after detection. The coiling reel 6 is driven by an existing power source to automatically coil the wire.

[0058] It should be noted that the two CCD cameras 51 cooperate to collect the image information of the four surfaces of the enameled wire in the environment of diffused reflection light, realizing the four-sided detection of the enameled wire.

[0059] Embodiment Four As Figure 13 shown, this embodiment provides an on-line detection method for the color difference and surface defects of enameled wire, including the following steps: Step One, the enameled wire temporary storage process. During the intermittent detection of the enameled wire, the enameled wire at the image acquisition mechanism 5 is intermittently stationary, while the temporary storage mechanism 2 temporarily stores the continuously transmitted enameled wire at the two guiding 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 liquid to be wetted, and 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 inclination angle of the enameled wire; Step Three, the enameled wire anti-vibration process. First, the tension of the enameled wire at the image acquisition mechanism 5 is adjusted to make the enameled wire straight, and then the enameled wire is clamped and stabilized to eliminate the interference of the enameled wire vibration; Step 4: Enameled wire detection process. Two CCD cameras 51 cooperate to collect image information of four sides of the enameled wire under the environment of diffuse reflection light, so as to realize the four-side detection of the enameled wire. The gigabit Ethernet standard is adopted, and data transmission is realized through the full-duplex connection of the switch. The computer system platform first preprocesses the enameled wire image, performs image denoising, enhancement processing, and separates the background of the enameled wire by 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, the color difference is detected, and then the surface defects of the enameled wire are identified. If there are defects in the current image, the features of the defects in the image are extracted and analyzed. If there are no defects in the current image, no subsequent processing is performed on the image, and the next frame of the original enameled wire image is directly read.

[0060] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An on-line detection device for the color difference and surface defects of enameled wires, comprising an image acquisition mechanism (5) installed on a frame (1), characterized in that, It further includes a temporary storage mechanism (2) disposed on the frame (1) and used for temporarily storing enameled wires to achieve intermittent detection thereof, a cleaning mechanism (3) disposed on the temporary storage mechanism (2) and used for cleaning the surface of the enameled wires, and an anti-shake mechanism (4) disposed on the frame (1) and used for stabilizing the enameled wires for image acquisition. The cleaning mechanism (3) includes a brushing assembly (31) disposed on the temporary storage mechanism (2) and an adjusting assembly (32) disposed on the temporary storage mechanism (2) and used for adjusting the brushing assembly (31) to adapt to the inclination angle of the enameled wires during the process of temporarily storing the enameled wires. During the process of the image acquisition mechanism (5) detecting static enameled wires, the temporary storage mechanism (2) temporarily stores the continuously transmitted enameled wires, the brushing assembly (31) cleans the temporarily stored enameled wires, the adjusting assembly (32) adjusts the state of the brushing assembly (31) in real time to stably clean the surface of the enameled wires, the anti-shake mechanism (4) quickly and stably positions the enameled wires at the image acquisition mechanism (5), and the image acquisition mechanism (5) acquires images of the enameled wires with little jitter interference.

2. The on-line detection device for the color difference and surface defects of enameled wire according to claim 1, characterized in that, The temporary storage mechanism (2) includes a temporary storage box (21) disposed on the frame (1) and filled with cleaning liquid, two guiding wheels (23) disposed on the upper port of the temporary storage box (21) through fixing rods (22), a horizontal extension rod (25) disposed inside the temporary storage box (21) and lifted and lowered through a first sliding table (24), and a lifting wheel (26) rotatably disposed on the horizontal extension rod (25) and used for pressing the enameled wires between the two guiding wheels (23) into the temporary storage box (21).

3. An on-line detection device for the color difference and surface defects of enameled wire according to claim 2, characterized in that, The adjusting assembly (32) includes a first U-shaped frame (321) disposed on one of the fixing rods (22) close to 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 for driving the first U-shaped frame (322), a transmission plate (324) hinged 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 for driving the second U-shaped frame (326), a guiding hole (328) opened on the transmission plate (324), and a sliding column (329) disposed inside the second U-shaped frame (326) and slidably matched with the guiding hole (328).

4. An on-line detection device for the color difference and surface defects of enameled wires according to claim 3, characterized in that, The brushing assembly (31) includes a cavity (311) formed inside the transmission plate (324), two L-shaped sliders (312) slidably and cooperatively arranged inside the cavity (311), a first elastic member (313) arranged between the two L-shaped sliders (312), a connecting rod (314) arranged on the L-shaped slider (312) and having one end penetrating to the outside of the transmission plate (324), two L-shaped brush plates (315) respectively arranged at the ends of the connecting rod (314) and cooperatively wrapping the surface of the enameled wire, two transmission rods (317) respectively hinged on the L-shaped sliders (312) and hinged to each other through a hinge seat (316), a pin unit (318) elastically lifted and lowered through the inside of the sliding column (329), a chute (319) formed on the inner wall of the guiding hole (328) and slidably cooperating with the lower end of the pin unit (318), an avoidance groove (3191) formed at the tail end of the guiding hole (328) for accommodating the upper end of the pin unit (318), a limiting groove (3192) formed on the chute (319), and a transmission block (3194) slidably arranged inside the limiting groove (3192) and connected to the hinge seat (316) through an elastic cord (3193) to drive the two L-shaped brush plates (315) to open.

5. An on-line detection device for the color difference and surface defects of enameled wires according to claim 1, characterized in that, The anti-shake mechanism (4) includes a tensioning assembly (41) arranged on the frame (1) for adjusting the tension degree of the enameled wire and a stabilizing assembly (42) arranged on the frame (1) for stabilizing the enameled wire.

6. The on-line detection device for the color difference and surface defects of enameled wire according to claim 5, characterized in that, The tensioning assembly (41) includes two transmission wheels (411) arranged on the frame (1) for horizontally guiding the enameled wire, a frame (413) lifted and lowered on the frame (1) through a second sliding table (412), a tensioning wheel (414) arranged on the frame (413), a receiving wheel (415) arranged on the frame (1) and located directly below the tensioning wheel (414), a material box (416) arranged on the frame (413) and filled with a marking liquid, and an automatic spray head (417) arranged on the frame (413) for marking the defective segments of the enameled wire.

7. An on-line detection device for the color difference and surface defects of enameled wires according to claim 5, characterized in that, The stabilizing assembly (42) includes a bidirectional lead screw (421) vertically rotatably arranged on the frame (1), a lifting frame (422) threaded on the bidirectional lead screw (421), and a clamping strip frame (424) arranged on the lifting frame (422) through an elastic telescopic member (423) and matching the enameled wire.

8. An on-line detection device for the color difference and surface defects of enameled wires according to claim 1, characterized in that, The image acquisition mechanism (5) includes two cameras (51) obliquely and symmetrically arranged on the frame (1) for respectively acquiring two adjacent surfaces of the enameled wire and a diffused light source (52) arranged on the camera (51).

9. An on-line detection device for the color difference and surface defects of enameled wires according to claim 1, characterized in that, It further includes a coiling reel (6) arranged on the frame (1) for collecting the enameled wire after detection.

10. An online detection method for the color difference and surface defects of enameled wire, which is applied to an online detection device for the color difference and surface defects of enameled wire as described in any one of claims 1-9, and is characterized in that, It includes the following steps: Step 1, temporary storage process of the enameled wire, during the process of intermittent detection of the enameled wire, the enameled wire at the image acquisition mechanism (5) is intermittently stationary, and the temporary storage mechanism (2) temporarily stores the enameled wire continuously transmitted at the two guide wheels (23); Step 2, the enameled wire cleaning process, in the process of temporarily storing the enameled wire, the enameled wire is soaked in the cleaning liquid to moisten it, and in the process of releasing the enameled wire, the surface of the enameled wire is continuously cleaned, and the brushing angle is automatically adjusted according to the inclination angle of the enameled wire; Step 3, the enameled wire anti-shake process, firstly adjust the tension of the enameled wire at the image acquisition mechanism (5), straighten the enameled wire, and then clamp and stabilize the enameled wire to eliminate the interference of enameled wire shaking; Step 4, enameled wire inspection process, two CCD cameras (51) cooperate to collect image information of four surfaces of the enameled wire under diffuse light environment and identify defects.

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