Method and device for on-line measurement of silicon steel sheet size in cross-cutting line based on machine vision

Abstract

A kind of machine vision-based transverse shear line silicon steel sheet size online measurement method and equipment, including setting detection silicon steel quantity;All silicon steel is transported to the same position of transfer platform;Single silicon steel sheet of transfer platform is handled to the support table of transparent structure;Light from the back of silicon steel sheet, vision detection mechanism obtains the overall shape image of silicon steel sheet, and obtains rough shape structure size by processing, confirms silicon steel model;Vision detection mechanism and mobile light source are synchronously moved to light from the back of silicon steel sheet to the local of silicon steel sheet, and real-time local image of silicon steel sheet is obtained, and after processing, real-time local structure size is obtained;Data processing module obtains fine structure size after fitting local structure size data, and detection system determines whether fine structure size meets requirements according to standard structure size.It realizes the automatic transfer, identification, measurement of silicon steel sheet, guarantees the placement position precision of silicon steel sheet, reduces the damage of site demand and handling process to silicon steel sheet, and saves labor cost.

Description

Technical Field

[0001] This invention relates to the field of measurement equipment technology, and in particular to a method and equipment for online measurement of the dimensions of cross-cut silicon steel sheets based on machine vision. Background Technology

[0002] Existing silicon steel sheet dimensional measurement equipment is typically offline, and there are two detection methods:

[0003] One method, manual point selection, relies on mechanical precision. It requires an operator to manually move the camera to the feature point on the silicon steel sheet using a dial, then select the feature point's coordinates. This process is repeated to obtain the coordinates of all feature points, and finally, the dimensional values ​​are derived. This process has the following risks / disadvantages:

[0004] ① The feature points need to be determined and selected by the operator. The selection of these points is subjective and fluctuates greatly.

[0005] ② The coordinate position is given by mechanical components, which will wear out after long-term use, and the detection accuracy cannot be guaranteed;

[0006] ③ The testing process is cumbersome and takes a long time.

[0007] Secondly, the template of the object to be tested is entered in advance, and the position of the initial point is given before measurement. The subsequent testing process is executed automatically and the test data is output.

[0008] Additionally, measuring equipment typically requires manual removal of the silicon steel sheets from the production equipment before measurement. Silicon steel sheets are characterized by their weight, softness, brittleness, susceptibility to impacts, and surface damage. Furthermore, the storage areas are often cramped and high. The process of manually moving the silicon steel sheets to the testing station and then stacking them back in their original location after testing presents the following risks / disadvantages:

[0009] ① The operating space is small, making it inconvenient to manually pick up / place silicon steel sheets;

[0010] ② When the silicon steel sheets are put back into the storage position, it is impossible to accurately locate their original position. The accuracy is insufficient, which affects the neatness of the stacking.

[0011] ③ During handling, because silicon steel sheets are relatively soft, operators cannot control their entire position, which can easily lead to defects such as corner impacts and scratches, affecting test results and product performance. Summary of the Invention

[0012] To address the shortcomings of existing production technologies, the applicant provides a machine vision-based online measurement method and equipment for silicon steel sheet dimensions at cross-cutting lines. This enables automatic transfer, automatic identification, and automatic measurement of the silicon steel sheets to be measured, ensuring the accuracy of the silicon steel sheet placement, reducing space requirements and damage to the silicon steel sheets during handling, and saving labor costs.

[0013] The technical solution adopted in this invention is as follows:

[0014] A machine vision-based online measurement method for the dimensions of cross-cut silicon steel sheets includes the following steps:

[0015] S1: Set the number of silicon steel sheets in one inspection cycle. The number of silicon steel sheets is the same as the number of silicon steel sheets in one production cycle of the cross-cutting line. The silicon steel sheets of one production cycle are stacked and placed at the unloading position of the cross-cutting line.

[0016] S2: The material handling mechanism automatically moves the material handling suction cup assembly to the unloading position of the cross-cutting line. After the material handling suction cup assembly grabs the single silicon steel sheet from the upper layer, it transports the silicon steel sheet to the transfer station.

[0017] S3: Repeat step S2 to sequentially move the silicon steel sheets of one production cycle to the same position on the transfer station;

[0018] S4: The pick-and-place suction cup assembly automatically moves to the top of the transfer platform. After the pick-and-place suction cup assembly grabs the single silicon steel sheet on the upper layer, the pick-and-place mechanism transports the silicon steel sheet to the support platform of the transparent structure. The pick-and-place suction cup assembly places the silicon steel sheet on the support platform.

[0019] S5: The visual inspection mechanism moves to the top of the silicon steel sheet on the support platform. The fixed light source under the support platform illuminates the back of the silicon steel sheet. The visual inspection mechanism acquires an overall shape image of the silicon steel sheet. The image processing module processes the overall shape image to obtain the rough shape and structural dimensions of the silicon steel sheet. The inspection system confirms the model of the silicon steel sheet based on the rough shape and structural dimensions of the silicon steel sheet.

[0020] S6: Turn off the fixed light source and turn on the moving light source to illuminate a local area of ​​the silicon steel sheet from the back. At the same time, the vision inspection mechanism and the moving light source move in sync and correspond to each other. The vision inspection mechanism acquires local images of different positions of the silicon steel sheet in real time. The image processing module receives the local images of the silicon steel sheet in real time and processes them to obtain the real-time local structural dimensions of the silicon steel sheet.

[0021] S7: The data processing module fits the local structural dimension data of the silicon steel sheet obtained in step S6 to obtain the fine structural dimension of the silicon steel sheet. The detection system determines whether the fine structural dimension of the silicon steel sheet meets the requirements according to the standard structural dimension corresponding to the model of the silicon steel sheet.

[0022] Repeat steps S4-S7 to complete the measurement of all silicon steel sheets in one production cycle and obtain the dimensions of all silicon steel sheets in one production cycle.

[0023] As a further improvement to the above technical solution:

[0024] After step S6 is completed, the pick-and-place suction cup assembly grabs the silicon steel sheet on the support platform, and the pick-and-place mechanism transports the silicon steel sheet to the unloading position of the measuring equipment. The order of the silicon steel sheets at the unloading position of the measuring equipment is the same as the order of the silicon steel sheets at the unloading position of the production equipment.

[0025] For silicon steel sheets with positioning holes in the middle, after one inspection cycle is completed, if the dimensions of all silicon steel sheets meet the requirements, the inspection system determines whether the silicon steel sheets at the unloading position of the measuring equipment are correctly sorted based on the positioning hole dimensions of all silicon steel sheets in one production cycle.

[0026] If one of the silicon steel sheets is sorted incorrectly, the incorrectly sorted silicon steel sheet is a misordered sheet. The automatic sorting steps are as follows:

[0027] S811: Transfer all the silicon steel sheets above the misordered sheets to the transfer platform in sequence and stack them;

[0028] S812: Transfer the misordered wafer to the support platform;

[0029] S813: Transfer the silicon steel sheets on the transfer table and the staggered sheets on the support table to the silicon steel sheets at the unloading position of the measuring equipment in the correct order.

[0030] For silicon steel sheets with positioning holes in the middle, after one inspection cycle is completed, if the dimensions of all silicon steel sheets meet the requirements, the inspection system determines whether the silicon steel sheets at the unloading position of the measuring equipment are correctly sorted based on the positioning hole dimensions of all silicon steel sheets in one production cycle.

[0031] If multiple silicon steel sheets are incorrectly sorted, the correctly sorted silicon steel sheets at the bottom of the measuring equipment's unloading position are the correct sheet group. The correct silicon steel sheets that need to be stacked above the correct sheet group are the sequential sheets. The automatic sorting steps are as follows:

[0032] S821: Transfer all the silicon steel sheets above the correct sheet group to the transfer platform in sequence and stack them;

[0033] S822: Determine whether the correct order of the pieces to be stacked above the correct piece group is on the support platform or the transfer platform;

[0034] S823: If the sequential sheet is located on the transfer platform, move the silicon steel sheets above the sequential sheet to the support platform in sequence and stack them, and then move and stack the sequential sheet on top of the correct sheet group.

[0035] If the sequential sheet is located on the support platform, the silicon steel sheets above the sequential sheet are sequentially moved to the transfer platform and stacked. Then the sequential sheet is moved and stacked on top of the correct sheet group.

[0036] S824: After the sequential wafers are stacked on top of the correct wafer group to form a new correct wafer group, repeat steps S822 and S823 until the number of silicon wafers in the new correct wafer group is the same as the number of silicon wafers in a detection cycle.

[0037] A machine vision-based online measurement device for the dimensions of silicon steel sheets in a cross-cutting line includes a processor for running the online measurement method for silicon steel sheet dimensions as described in any one of claims 1-4, and a support assembly on which a material handling mechanism, a transfer table, and a detection platform assembly are provided.

[0038] The material handling mechanism is equipped with a material handling suction cup assembly for gripping silicon steel sheets, and the material handling mechanism is used to automatically move the material handling suction cup assembly.

[0039] The transfer platform is used to place multiple silicon steel sheets and corresponds to the material handling suction cup assembly.

[0040] The middle part of the detection platform component is a support platform, which is a transparent structure. The support platform is used to place silicon steel sheets. A fixed light source is installed on the support component at the bottom of the support platform. A movable light source that moves relative to the support platform is provided between the fixed light source and the support platform.

[0041] A visual inspection mechanism is provided on the material handling mechanism. The visual inspection mechanism includes a visual inspection component, which corresponds to the upper surface of the silicon steel sheet placed on the support platform. The visual inspection component is used to acquire an image of the silicon steel sheet.

[0042] As a further improvement to the above technical solution:

[0043] The material handling mechanism includes two X-axis moving modules arranged parallel to each other on the support assembly. Each X-axis moving module has an X-axis moving block and is used to drive the X-axis moving block to move along a horizontal straight line. The mechanism also includes a Y-axis moving module, with its two ends fixedly connected to the two X-axis moving blocks. Each Y-axis moving module has a Y-axis moving block and is used to drive the Y-axis moving block to move along a horizontal straight line. The moving direction of the Y-axis moving block is perpendicular to the moving direction of the X-axis moving block.

[0044] The detection platform component is mounted on the support assembly between the two X-axis moving modules.

[0045] The visual inspection mechanism includes a vertical moving module fixedly installed on the Y-axis moving block, and a visual inspection component is provided on the vertical moving module. The vertical moving module is used to drive the visual inspection component to move in the vertical direction.

[0046] A Z-axis moving module is also fixedly installed on the Y-axis moving block. The Z-axis moving module is equipped with the material pick-and-place suction cup assembly, which is used to drive the material pick-and-place suction cup assembly to move in the vertical direction.

[0047] The structure of the Z-axis moving module is as follows: it includes a Z-axis bracket fixedly installed on the Y-axis moving block, a first motor fixedly installed on the Z-axis bracket, a first lead screw rotatably installed on the Z-axis bracket and a first slider slidably installed on the Z-axis bracket, the length direction of the first lead screw is consistent with the vertical direction, the first slider is drivenly connected to the first lead screw, and the material pick-and-place suction cup assembly is fixedly installed on the first slider;

[0048] The structure of the vertical movement module is as follows: it includes a vertical support fixedly installed on the Y-axis moving block, a second motor fixedly installed on the vertical support, a second lead screw rotatably installed on the vertical support, and a second slider slidably installed on the vertical support. The length direction of the second lead screw is consistent with the vertical direction, the second slider is drivenly connected to the second lead screw, and the vision inspection component is fixedly installed on the second slider.

[0049] The visual inspection component includes a model identification camera and a size detection camera.

[0050] The structure of the detection platform component is as follows: it includes a platform bracket, which is fixedly installed on the support component. The support platform is fixedly installed on the platform bracket. Slide rails are installed on both sides of the platform bracket. A horizontal slider is slidably installed on the slide rails. A horizontal drive mechanism is installed on one side of the platform bracket. The horizontal drive mechanism includes a drive motor fixedly installed on the platform bracket and a horizontal lead screw rotatably installed on the platform bracket. The output end of the drive motor is drivenly connected to the horizontal lead screw. The horizontal lead screw is drivenly connected to the horizontal slider. The end of the movable light source is fixedly connected to the horizontal slider.

[0051] The beneficial effects of this invention are as follows:

[0052] This invention features a compact and reasonable structure, and is easy to operate. It achieves automatic transfer of silicon steel sheets by automatically handling the silicon steel sheets between the unloading position, transfer table, and support table of the cross-cutting line, reducing space requirements and damage to the silicon steel sheets during handling. By using backlighting combined with the image acquisition function of a vision camera, the process of selecting measurement reference points is eliminated, and there is no need to pre-enter templates. The size of the silicon steel sheet can be directly determined by the structural dimensions of the corresponding model to determine whether the size meets the requirements, enabling accurate and rapid detection of the size of the silicon steel sheet, and realizing automatic identification and automatic measurement.

[0053] Furthermore, the present invention also has the following advantages:

[0054] (1) By setting up a support platform made of transparent material to place silicon steel sheets, and illuminating them from the back of the silicon steel sheets, the silicon steel sheets are all black and the non-silicon steel sheet areas are white in the resulting image. The two areas are clearly contrasted and have distinct boundaries. The error in the edge contour processing of the silicon steel sheets is within two pixels, and the influence of other interference objects can be ignored, which helps to improve the detection accuracy of silicon steel sheets.

[0055] (2) By first confirming the correct sequence of the correctly sorted silicon steel sheets, the order of the sheets to be stacked is obtained. Then, the incorrectly sorted silicon steel sheets are moved between the support platform and the transfer platform to find the order of the sheets to be stacked in sequence. This realizes automatic sorting when multiple silicon steel sheets are incorrectly sorted. At the same time, the silicon steel sheets are automatically measured, and the silicon steel sheets are automatically sorted and their sequence is automatically detected and corrected, thereby improving the automation level of production.

[0056] (3) The transfer platform serves as a relay platform between the silicon steel sheet stacking platform and the measuring equipment. A group of silicon steel sheets can be temporarily stored on the transfer platform for testing, making full use of the space and reducing the testing interval between two adjacent silicon steel sheets.

[0057] (4) By setting up a material handling suction cup assembly and a vision inspection mechanism on the material handling mechanism, the automatic movement of the material handling suction cup assembly and the vision inspection mechanism can be realized, while simplifying the structure of the moving mechanism of the measuring equipment and reducing the manufacturing cost of the measuring equipment. Attached Figure Description

[0058] Figure 1 This is a schematic diagram of the structure of the present invention.

[0059] Figure 2 This is a schematic diagram of the structure of the present invention (from another perspective).

[0060] Figure 3 This is a schematic diagram of the structure of the present invention (from another perspective).

[0061] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0062] Figure 5 This is a schematic diagram of the Z-axis moving module and related components of the present invention.

[0063] Figure 6 This is a schematic diagram of the vertical movement module and vision inspection component of the present invention.

[0064] Figure 7 A comparison image showing the front and back of a silicon steel sheet being illuminated.

[0065] Figure 8 Automatic sorting flowchart when multiple silicon steel sheets are sorted incorrectly.

[0066] Among them: 1. Support components;

[0067] 2. Material handling mechanism; 21. X-axis moving module; 211. X-axis moving block; 22. Y-axis moving module; 221. Y-axis moving block;

[0068] 23. Z-axis moving module; 231. First slider; 232. Z-axis bracket; 233. First motor; 24. Pick-up and unpick-up suction cup assembly; 241. Pick-up and unpick-up rack; 242. Suction cup mounting plate;

[0069] 3. Visual inspection mechanism; 31. Vertical moving module; 311. Second slider; 312. Vertical support; 313. Second motor; 32. Visual inspection component; 321. Model identification camera; 322. Size inspection camera; 4. Transfer platform;

[0070] 5. Detection platform components; 51. Support platform; 52. Slide rail; 53. Horizontal slider; 54. Platform bracket; 6. Fixed light source; 7. Moving light source; 8. Horizontal drive mechanism. Detailed Implementation

[0071] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0072] Example 1:

[0073] like Figures 1-6 As shown in this embodiment, the online measurement method for the dimensions of cross-cut silicon steel sheets based on machine vision includes the following steps:

[0074] S1: Set the number of silicon steel sheets in one inspection cycle. The number of silicon steel sheets is the same as the number of silicon steel sheets in one production cycle of the cross-cutting line. The silicon steel sheets of one production cycle are stacked and placed at the unloading position of the cross-cutting line.

[0075] Specifically, the silicon steel sheet inspection scheme in this embodiment is applicable to the inspection of multiple silicon steel sheets. A production cycle produces one set of silicon steel sheets, which constitutes a set of step-by-step silicon steel sheets in the core stacking operation. When positioning holes are provided on the silicon steel sheets, the dimensions of a set of silicon steel sheets are inconsistent, mainly differing in the position of the positioning holes. Based on the assembly requirements of the subsequent processes of the measuring equipment and the needs of specific production orders, all silicon steel sheets in a complete cycle are inspected before the set of silicon steel sheets is used for core stacking. A production cycle may contain three to nine silicon steel sheets, and the measuring equipment automatically inspects the dimensions of all silicon steel sheets in the cycle at once.

[0076] S2: The material handling mechanism 2 automatically moves the material handling suction cup assembly 24 to the unloading position of the cross-cutting line. After the material handling suction cup assembly 24 grabs the single silicon steel sheet on the upper layer, it transports the silicon steel sheet to the transfer table 4.

[0077] Specifically, before the pick-and-place suction cup assembly 24 grips the upper layer of single silicon steel sheet, the control system of the measuring equipment selects the number of suction cups on the pick-and-place suction cup assembly 24 to operate based on the key dimension information from the production equipment, so that the gripping area of ​​the pick-and-place suction cup assembly 24 matches the key dimension information. The industrial control computer transmits the key dimension information of the silicon steel sheet for one production cycle to the PLC module of the measuring equipment (i.e., the control system of the measuring equipment) via CAN bus communication. After reading the key dimension information, the PLC module compares it with the standard lookup table pre-stored in the PLC module, selects the number of vacuum generators and suction cups to be opened corresponding to the key dimension information, and controls the opening and closing of the corresponding number of solenoid valves through the PLC program, thereby realizing that only a certain number of vacuum suction cups are opened, ensuring precise control of the gripping position of the silicon steel sheet, ensuring uniform gripping position, and avoiding severe sagging of any part of the silicon steel sheet, which could damage the silicon steel sheet during transportation.

[0078] S3: Repeat step S2 to sequentially transport the silicon steel sheets of one production cycle to the same position on the transfer station 4;

[0079] Specifically, after a layer of silicon steel sheets is moved from the shearing line's unloading position to the transfer station 4, the silicon steel sheets are arranged in reverse order. For example, when the silicon steel sheets are unloading from the shearing line, their bottom-up sequence number is 1234567. After being transferred to the transfer station 4, the bottom-up sequence number is 7654321. When the silicon steel sheets are moved again from the support platform 51 to the measuring equipment's unloading position, their sequence number is 1234567. This ensures that the order of the silicon steel sheets remains unchanged during the production process, facilitating subsequent installation operations. Simultaneously, adding a transfer step during the inspection process allows a group of silicon steel sheets to be temporarily stored on the transfer station 4 for inspection, making full use of space and reducing the inspection interval between adjacent silicon steel sheets.

[0080] S4: The pick-and-place suction cup assembly 24 automatically moves to the top of the transfer platform 4. After the pick-and-place suction cup assembly 24 grabs the single silicon steel sheet on the upper layer, the pick-and-place mechanism 2 transports the silicon steel sheet to the top of the transparent support platform 51. The pick-and-place suction cup assembly 24 places the silicon steel sheet on the support platform 51.

[0081] S5: The visual inspection mechanism 3 moves to the top of the silicon steel sheet on the support platform 51. The fixed light source 6 below the support platform 51 illuminates the back of the silicon steel sheet. The visual inspection mechanism 3 acquires the overall shape image of the silicon steel sheet. The image processing module processes the overall shape image to obtain the rough shape structure size of the silicon steel sheet. The inspection system confirms the model of the silicon steel sheet based on the rough shape structure size of the silicon steel sheet.

[0082] Specifically, the movement position of the visual inspection mechanism 3 can be located by the image information collected by the model identification camera 321 of the visual inspection mechanism 3, and then the data is integrated after the size detection camera 322 of the visual inspection mechanism 3 collects local images.

[0083] By setting a transparent support platform 51 to place the silicon steel sheet, and illuminating it from the back of the silicon steel sheet, the silicon steel sheet appears entirely black and the non-silicon steel sheet areas appear white in the resulting image. The two areas are clearly contrasted and have distinct boundaries. The error in processing the edge contour of the silicon steel sheet is within two pixels, and the influence of other interference objects can be ignored, which helps to improve the detection accuracy of the silicon steel sheet.

[0084] The transparent support platform 51 serves to hold the silicon steel sheet, facilitating backlighting of the silicon steel sheet by the light source assembly during size measurement. Compared to front lighting, backlighting helps the vision inspection component 32 accurately measure the size of the silicon steel sheet. A comparison of front and back lighting effects is shown in the figure. Figure 7 As shown, image a is the image captured by the camera when the light is from the front, and image b is the image captured by the camera when the light is from the back.

[0085] Using front lighting requires consideration of the background material, color, and texture of the silicon steel sheet, and places high demands on the light intensity on the shooting surface. The contrast between the silicon steel sheet area and the non-silicon steel sheet area in the resulting image is not as strong as with back lighting, and the error in edge contour processing exceeds four pixels, which will reduce the detection accuracy and be affected by other dirt particles and foreign objects, increasing the complexity of detection processing.

[0086] S6: Turn off the fixed light source 6 and turn on the movable light source 7 to illuminate a local area of ​​the silicon steel sheet from the back. At the same time, the vision inspection mechanism 3 and the movable light source 7 move vertically and synchronously. The vision inspection mechanism 3 acquires local images of different positions of the silicon steel sheet in real time. The image processing module receives the local images of the silicon steel sheet in real time and processes them to obtain the real-time local structural dimensions of the silicon steel sheet. Preferably, the moving direction of the movable light source 7 is along the length of the silicon steel sheet, so that the illumination of the movable light source 7 is concentrated in the entire width direction of the silicon steel sheet. During the movement of the vision inspection mechanism 3, the dimensions of the edge of the silicon steel sheet are gradually acquired. After data fitting, the complete size structure of the silicon steel sheet is obtained for size measurement. The movable light source 7 and the vision inspection component 32 move to the image acquisition point at the same speed, which can reach 0.4m / s. The starting point and ending point of the size inspection camera 322 are defined internally by the control system of the inspection equipment. The acquired images are transmitted to the computer of the control system of the inspection equipment. The computer has a built-in image processing module to process the images and obtain the size information.

[0087] S7: The data processing module fits the local structural dimension data of the silicon steel sheet obtained in step S6 to obtain the fine structural dimension of the silicon steel sheet. The detection system determines whether the fine structural dimension of the silicon steel sheet meets the requirements according to the standard structural dimension corresponding to the model of the silicon steel sheet.

[0088] Specifically, the structural dimensions of the silicon steel sheet include the number of positioning holes in the silicon steel sheet and the coordinates and radii of the center of all holes, as well as the coordinates of the corner points of the outer contour of the silicon steel sheet. Since backlighting is used for imaging, the silicon steel sheet is easily separated from the background, and no excessive preprocessing of the image is required, preserving the original image to the greatest extent possible to improve the accuracy of subsequent edge detection. The coordinate points obtained by the image processing module are returned to the computer, and the data processing module in the computer processes the data and outputs data such as length and angle in the computer's EXCEL file.

[0089] Repeat steps S4-S7 to complete the measurement of all silicon steel sheets in one production cycle and obtain the dimensions of all silicon steel sheets in one production cycle.

[0090] The automatic transfer of silicon steel sheets is achieved by automatically handling the silicon steel sheets between the unloading position of the cross-cutting line, the transfer table 4, and the support table 51. This reduces the space requirements and the damage to the silicon steel sheets during handling. The backlighting method combined with the image acquisition function of the vision camera eliminates the need to select measurement reference points and pre-enter templates. It directly judges whether the size of the silicon steel sheet meets the requirements based on the structural dimensions of the corresponding model, enabling accurate and rapid detection of the size of the silicon steel sheet and achieving automatic identification and measurement.

[0091] Furthermore, after step S6 is completed, the pick-and-place suction cup assembly 24 picks up the silicon steel sheet on the support table 51, and the pick-and-place mechanism 2 transports the silicon steel sheet to the unloading position of the measuring equipment. The order of the silicon steel sheets at the unloading position of the measuring equipment is the same as the order of the silicon steel sheets at the unloading position of the production equipment.

[0092] Specifically, the location of the material feeding position of the measuring equipment can be set according to production needs.

[0093] After the silicon steel sheets in a production cycle are measured, the inspected silicon steel sheets are sorted to match the order when they are cut into the cross-cutting line, and an automatic error correction station is provided.

[0094] Furthermore, for silicon steel sheets with positioning holes in the middle, after the inspection of silicon steel sheets in one inspection cycle is completed, if the dimensions of the silicon steel sheets all meet the requirements, the inspection system determines whether the silicon steel sheets at the unloading position of the measuring equipment are correctly sorted based on the positioning hole dimensions of all silicon steel sheets in one production cycle.

[0095] If one of the silicon steel sheets is sorted incorrectly, the incorrectly sorted silicon steel sheet is a misordered sheet. The automatic sorting steps are as follows:

[0096] S811: Transfer all the silicon steel sheets above the misordered sheets to the transfer table 4 in sequence and stack them;

[0097] S812: Transfer the misordered piece to the support platform 51;

[0098] S813: Transfer the silicon steel sheets on the transfer table 4 and the staggered sheets on the support table 51 to the silicon steel sheets at the unloading position of the measuring equipment in the correct order.

[0099] The specific sorting actions are illustrated in Table 1.

[0100] Table 1. Schematic diagram of silicon steel sheet sorting action

[0101]

[0102] Furthermore, for silicon steel sheets with positioning holes in the middle, after the inspection of silicon steel sheets in one inspection cycle is completed, if the dimensions of the silicon steel sheets all meet the requirements, the inspection system determines whether the silicon steel sheets at the unloading position of the measuring equipment are correctly sorted based on the positioning hole dimensions of all silicon steel sheets in one production cycle.

[0103] If multiple silicon steel sheets are incorrectly sorted, the correctly sorted silicon steel sheets at the bottom of the measuring equipment's unloading position are the correct sheet group. The correct silicon steel sheets that need to be stacked above the correct sheet group are the sequential sheets. The automatic sorting flowchart is as follows: Figure 8 As shown, the automatic sorting steps are as follows:

[0104] S821: Transfer all the silicon steel sheets above the correct sheet group to the transfer table 4 in sequence and stack them;

[0105] S822: Determine whether the correct order of the pieces to be stacked above the correct piece group is on the support platform 51 or the transfer platform 4;

[0106] S823: If the sequential sheet is located on the transfer table 4, the silicon steel sheets above the sequential sheet are sequentially transported to the support table 51 and stacked. Then the sequential sheet is transported and stacked on top of the correct sheet group.

[0107] If the sequential sheet is located on the support platform 51, the silicon steel sheets above the sequential sheet are sequentially transported to the transfer platform 4 and stacked. Then the sequential sheet is transported and stacked on top of the correct sheet group.

[0108] S824: After the sequential wafers are stacked on top of the correct wafer group to form a new correct wafer group, repeat steps S822 and S823 until the number of silicon wafers in the new correct wafer group is the same as the number of silicon wafers in a detection cycle.

[0109] By first confirming the correct sequence of silicon steel sheets to be stacked, the incorrectly ordered silicon steel sheets are then moved between the support platform 51 and the transfer platform 4 to find the correct sequence of sheets to be stacked. This achieves automatic sorting when multiple silicon steel sheets are incorrectly ordered, and simultaneously enables automated measurement of silicon steel sheets, automated sequence detection and error correction sorting, thereby improving the level of automation in production.

[0110] Example 2:

[0111] like Figures 1-4 As shown, the online measurement device for silicon steel sheet size based on machine vision in this embodiment includes a processor for running the online measurement method for silicon steel sheet size in Embodiment 1, and also includes a support component 1, on which a material handling mechanism 2, a transfer table 4 and a detection platform component 5 are provided;

[0112] The material handling mechanism 2 is equipped with a material handling suction cup assembly 24 for gripping silicon steel sheets. The material handling mechanism 2 is used to automatically move the material handling suction cup assembly 24.

[0113] The transfer station 4 is used to place multiple silicon steel sheets and corresponds to the material handling suction cup assembly 24.

[0114] The middle part of the testing platform component 5 is a support platform 51. The support platform 51 is a transparent structure. The support platform 51 is used to place silicon steel sheets. A fixed light source 6 is installed on the support component 1 at the bottom of the support platform 51. A movable light source 7 that moves relative to the support platform 51 is set between the fixed light source 6 and the support platform 51.

[0115] A visual inspection mechanism 3 is provided on the material handling mechanism 2. The visual inspection mechanism 3 includes a visual inspection component 32, which corresponds to the upper surface of the silicon steel sheet placed on the support table 51. The visual inspection component 32 is used to acquire images of the silicon steel sheet.

[0116] Specifically: the visual inspection mechanism 3 and the material handling suction cup assembly 24 do not work simultaneously;

[0117] The material handling mechanism 2 is used to transport silicon steel sheets from the unloading position of the upstream cross-cutting line to the measuring equipment. After the silicon steel sheets are inspected, they are transported to the unloading position of the measuring equipment and enter the next core stacking process, thus realizing the function of online inspection.

[0118] The transfer station 4 serves as a relay platform between the silicon steel sheet stacking platform and the measuring equipment. A set of silicon steel sheets can be temporarily stored on the transfer station 4 for testing, making full use of the space and reducing the testing interval between two adjacent silicon steel sheets.

[0119] The support platform 51 can provide support and allow the light from the light source component to pass through the edge of the silicon steel sheet and enter the field of view of the vision inspection component 32. The support platform 51 can be made of transparent glass.

[0120] The material pick-and-place suction cup assembly 24 can move axially in the three directions of X-axis, Y-axis and Z-axis in the coordinate system through the material pick-and-place mechanism 2, so as to precisely control the position of the material pick-and-place suction cup assembly 24. Specifically, the material pick-and-place mechanism 2 can include an X-axis moving module 21, a Y-axis moving module 22 and a Z-axis moving module 23. Each moving module is equipped with a motor and a reducer, so that each moving module can move accurately to the designated position.

[0121] The vision inspection component 32 can acquire the overall shape image of the silicon steel sheet and local images of different positions of the silicon steel sheet; the feeding and unloading mechanism 2 serves as the driving mechanism for the moving vision inspection mechanism 3, which drives the vision inspection mechanism 3 to move and thus realizes the movement of the vision inspection component 32, so that the vision inspection component 32 corresponds to the position of the silicon steel sheet to be inspected.

[0122] By setting a material handling suction cup assembly 24 and a vision inspection mechanism 3 on the material handling mechanism 2, the automatic movement of the material handling suction cup assembly 24 and the vision inspection mechanism 3 can be realized, while simplifying the structure of the moving mechanism of the measuring equipment and reducing the manufacturing cost of the measuring equipment.

[0123] Furthermore, such as Figures 1-3 As shown, the material handling mechanism 2 includes two X-axis moving modules 21 arranged parallel to each other on the support component 1. X-axis moving modules 21 are provided with X-axis moving blocks 211. The X-axis moving modules 21 are used to drive the X-axis moving blocks 211 to move in a horizontal straight line direction. It also includes a Y-axis moving module 22. The two ends of the Y-axis moving module 22 are fixedly connected to the two X-axis moving blocks 211 respectively. Y-axis moving modules 22 are provided with Y-axis moving blocks 221. The Y-axis moving module 22 is used to drive the Y-axis moving blocks 221 to move in a horizontal straight line direction. The moving direction of the Y-axis moving blocks 221 is perpendicular to the moving direction of the X-axis moving blocks 211.

[0124] The detection platform component 5 is installed on the support component 1 between the two X-axis moving modules 21.

[0125] Specifically, the X-axis moving module 21 and the Y-axis moving module 22 have the same structure. Both can be driven by a motor to rotate the lead screw and then move the X-axis moving block 211 or the Y-axis moving block 221 through the nut on the lead screw. The support component 1 is a frame structure.

[0126] Furthermore, such as Figures 4-6 As shown, the visual inspection mechanism 3 includes a vertical moving module 31 fixedly mounted on the Y-axis moving block 221. A visual inspection component 32 is disposed on the vertical moving module 31. The vertical moving module 31 is used to drive the visual inspection component 32 to move in the vertical direction. The vertical moving module 31 drives the visual inspection component 32 to move vertically to a suitable detection focal length.

[0127] A Z-axis moving module 23 is also fixedly installed on the Y-axis moving block 221. A material pick-and-place suction cup assembly 24 is provided on the Z-axis moving module 23. The Z-axis moving module 23 is used to drive the material pick-and-place suction cup assembly 24 to move in the vertical direction.

[0128] Furthermore, such as Figures 4-6 As shown, the structure of the Z-axis moving module 23 is as follows: it includes a Z-axis bracket 232 fixedly installed on the Y-axis moving block 221, a first motor 233 fixedly installed on the Z-axis bracket 232, a first lead screw rotatably installed on the Z-axis bracket 232 and a first slider 231 slidably installed on the Z-axis bracket 232, the length direction of the first lead screw is consistent with the vertical direction, the first slider 231 is connected to the first lead screw in a transmission, and a material pick-and-place suction cup assembly 24 is fixedly installed on the first slider 231;

[0129] The structure of the vertical moving module 31 is as follows: it includes a vertical support 312 fixedly installed on the Y-axis moving block 221, a second motor 313 fixedly installed on the vertical support 312, a second lead screw rotatably installed on the vertical support 312, and a second slider 311 slidably installed on the vertical support 312. The length direction of the second lead screw is consistent with the vertical direction. The second slider 311 is connected to the second lead screw in a transmission connection. A vision inspection component 32 is fixedly installed on the second slider 311.

[0130] The Z-axis moving module 23 is driven by a screw drive, which makes the vertical movement of the pick-and-place suction cup assembly 24 precise and controllable; the vertical moving module 31 is driven by a screw drive, which makes the vertical movement of the vision inspection assembly 32 precise and controllable.

[0131] Furthermore, such as Figure 5 As shown, the structure of the pick-and-place suction cup assembly 24 is as follows: it includes a pick-and-place rack 241 installed on the Z-axis moving module 23, a suction cup mounting plate 242 installed at the bottom of the pick-and-place rack 241, the suction cup mounting plate 242 is parallel to the horizontal plane, and multiple suction cups are arrayed on the suction cup mounting plate 242.

[0132] Specifically, the pick-and-place rack 241 is fixedly connected to the first slider 231 on the Z-axis moving module 23; the suction cup on the pick-and-place suction cup assembly 24 is used to pick up silicon steel sheets. The suction action of the suction cup is controlled by the suction cup control system, which includes a vacuum generator, a vacuum pressure gauge, and a solenoid valve. The suction cup is connected to the vacuum generator through a pipe. Each vacuum generator is equipped with a solenoid valve to control the opening and closing of the vacuum generator. When the solenoid valve is open, the vacuum generator causes the suction cup to generate suction force, which can adsorb the silicon steel sheet to be tested; when the solenoid valve is closed, the vacuum generator is closed, and the suction cup does not generate suction force.

[0133] Multiple distributed suction cups can activate different numbers of vacuum generators and suction cups as needed based on the latest critical dimensions of the silicon steel sheet to be inspected. This reduces unnecessary waste while ensuring the entire surface of the silicon steel sheet is picked up, preventing severe sagging in any part of the sheet. The latest critical dimensions of the silicon steel sheet mentioned here are derived from the upstream cross-cut line and are approximate dimensional information.

[0134] The control system of the measuring equipment controls the movement of the X-axis moving module 21 and the Y-axis moving module 22 to move the Z-axis moving module 23 to the position for picking up and placing silicon steel sheets. The first motor 233 of the Z-axis moving module 23 starts and drives the picking up and placing suction cup assembly 24, which is fixedly installed on the first slider 231, to move up and down.

[0135] When it is necessary to pick up the silicon steel sheet, the first motor 233 starts, causing the first slider 231 to move downward, which in turn causes the pick-and-place suction cup assembly 24 to move downward. The downward movement height is controlled by data preset in the control system of the measuring equipment. The upper surface of the silicon steel sheet just contacts or slightly presses against the suction cup on the pick-and-place suction cup assembly 24. The suction cup sucks in air and adsorbs the upper silicon steel sheet. After that, the first motor 233 starts, causing the first slider 231 to move upward, which in turn causes the pick-and-place suction cup assembly 24 and the picked-up silicon steel sheet to be lifted together.

[0136] When it is necessary to place the silicon steel sheet, the first motor 233 starts to move the first slider 231 downward to a suitable height. This height is controlled by data preset in the control system of the measuring device. The suction cup stops sucking air and uses the gravity of the silicon steel sheet to separate the silicon steel sheet from the suction cup. Then the first motor 233 starts to move the first slider 231 upward, and the material pick-and-place suction cup assembly 24 is lifted.

[0137] Furthermore, such as Figure 6 As shown, the visual inspection component 32 includes a model identification camera 321 and a size inspection camera 322. Both the model identification camera 321 and the size inspection camera 322 are purchased components.

[0138] Furthermore, such as Figure 4As shown, the structure of the detection platform component 5 is as follows: it includes a platform bracket 54, which is fixedly mounted on the support component 1. A support platform 51 is fixedly mounted on the platform bracket 54. Slide rails 52 are mounted on both sides of the platform bracket 54, and a horizontal slider 53 is slidably mounted on the slide rails 52. A horizontal drive mechanism 8 is mounted on one side of the platform bracket 54. The horizontal drive mechanism 8 includes a drive motor fixedly mounted on the platform bracket 54 and a horizontal lead screw rotatably mounted on the platform bracket 54. The output end of the drive motor is connected to the horizontal lead screw, and the horizontal lead screw is connected to the horizontal slider 53. The end of the movable light source 7 is fixedly connected to the horizontal slider 53. The rotation of the output end of the drive motor drives the horizontal lead screw to rotate. The horizontal lead screw and the horizontal slider 53 are connected by a thread. The rotation of the horizontal lead screw drives the horizontal slider 53 to slide on the slide rails 52, thereby causing the movable light source 7 to move relative to the support platform 51.

[0139] Specifically, during the operation of the measuring equipment, the model identification camera 321 first identifies the specific model of the silicon steel sheet, and then the dimension inspection camera 322 measures the size of the silicon steel sheet. The fixed light source 6 is a fixed strip light source, aligned with the length direction of the silicon steel sheet on the support platform 51, and its specific length is adapted to the length of the silicon steel sheet being measured. It is used to illuminate the back of the silicon steel sheet when the model identification camera 321 is working, providing a large-area light source. At the same time, the model identification camera 321 does not have high requirements for lighting conditions and accuracy, and the use of the fixed light source 6 can provide a large-area light source. With adequate ambient lighting and sufficient light intensity, the model identification camera 321 acquires the overall external structural dimensions to identify the model of the silicon steel sheet; the movable light source 7 is located between the support platform 51 and the fixed light source 6, and is used to provide back lighting from the back of the silicon steel sheet's inspection area. It provides illumination when the size inspection camera 322 is working. When the size inspection camera 322 is working, the movable light source 7 and the size inspection camera 322 move synchronously, which can provide good lighting conditions. The light is strong and concentrated, ensuring image quality, improving size inspection accuracy, and reducing inspection complexity.

[0140] The fixed light source 6 and the movable light source 7 do not work at the same time. When the movable light source 7 is not working, it moves to one end of the support platform 51 to avoid blocking the light when the fixed light source 6 is working.

[0141] The above description is an explanation of the present invention and not a limitation thereof. The scope of the present invention is defined by the claims. Within the scope of protection of the present invention, any form of modification may be made.

Claims

1. A machine vision-based online measurement method for the dimensions of cross-cut silicon steel sheets, characterized in that: Includes the following steps: S1: Set the number of silicon steel sheets in one inspection cycle. The number of silicon steel sheets is the same as the number of silicon steel sheets in one production cycle of the cross-cutting line. The silicon steel sheets of one production cycle are stacked and placed at the unloading position of the cross-cutting line. S2: The material handling mechanism (2) automatically moves the material handling suction cup assembly (24) to the unloading position of the cross-cutting line. The material handling suction cup assembly (24) grabs the single silicon steel sheet on the upper layer and then transports the silicon steel sheet to the transfer table (4). S3: Repeat step S2 to sequentially transport the silicon steel sheets of one production cycle to the same position on the transfer station (4); S4: The pick-and-place suction cup assembly (24) automatically moves to the top of the transfer table (4). After the pick-and-place suction cup assembly (24) grabs the single silicon steel sheet on the upper layer, the pick-and-place mechanism (2) transports the silicon steel sheet to the top of the support platform (51) of the transparent structure. The pick-and-place suction cup assembly (24) places the silicon steel sheet on the support platform (51). S5: The visual inspection mechanism (3) moves to the top of the silicon steel sheet on the support platform (51), and the fixed light source (6) under the support platform (51) illuminates the back of the silicon steel sheet. The visual inspection mechanism (3) obtains the overall shape image of the silicon steel sheet. The image processing module processes the overall shape image to obtain the rough shape structure size of the silicon steel sheet. The inspection system confirms the model of the silicon steel sheet based on the rough shape structure size of the silicon steel sheet. S6: Turn off the fixed light source (6), turn on the moving light source (7) to illuminate the silicon steel sheet from the back of the silicon steel sheet. At the same time, the visual inspection mechanism (3) and the moving light source (7) move up and down in sync. The visual inspection mechanism (3) acquires local images of different positions of the silicon steel sheet in real time. The image processing module receives the local images of the silicon steel sheet in real time and processes them to obtain the real-time local structural dimensions of the silicon steel sheet. S7: The data processing module fits the local structural dimension data of the silicon steel sheet obtained in step S6 to obtain the fine structural dimension of the silicon steel sheet. The detection system determines whether the fine structural dimension of the silicon steel sheet meets the requirements according to the standard structural dimension corresponding to the model of the silicon steel sheet. Repeat steps S4-S7 to complete the measurement of all silicon steel sheets in one production cycle and obtain the dimensions of all silicon steel sheets in one production cycle; By first confirming the correct sequence of the correctly sorted silicon steel sheets, the order in which they need to be stacked is obtained. Then, the incorrectly sorted silicon steel sheets are moved between the support platform (51) and the transfer platform (4) to find the order in which they need to be stacked, thus realizing automatic sorting when multiple silicon steel sheets are incorrectly sorted.

2. The online measurement method for the dimensions of cross-cut silicon steel sheets based on machine vision as described in claim 1, characterized in that: After step S6 is completed, the pick-and-place suction cup assembly (24) grabs the silicon steel sheet on the support table (51), and the pick-and-place mechanism (2) transports the silicon steel sheet to the unloading position of the measuring equipment. The order of the silicon steel sheets at the unloading position of the measuring equipment is the same as the order of the silicon steel sheets at the unloading position of the production equipment.

3. The online measurement method for the dimensions of cross-cut silicon steel sheets based on machine vision as described in claim 2, characterized in that: For silicon steel sheets with positioning holes in the middle, after one inspection cycle is completed, if the dimensions of all silicon steel sheets meet the requirements, the inspection system determines whether the silicon steel sheets at the unloading position of the measuring equipment are correctly sorted based on the positioning hole dimensions of all silicon steel sheets in one production cycle. If one of the silicon steel sheets is sorted incorrectly, the incorrectly sorted silicon steel sheet is a misordered sheet. The automatic sorting steps are as follows: S811: Transfer all the silicon steel sheets above the staggered sheet to the transfer table (4) in sequence and stack them; S812: Transfer the misordered piece to the support platform (51); S813: Transfer the silicon steel sheets on the transfer table (4) and the staggered sheets on the support table (51) in the correct order to the silicon steel sheets at the unloading position of the measuring equipment.

4. The online measurement method for the dimensions of cross-cut silicon steel sheets based on machine vision as described in claim 2, characterized in that: For silicon steel sheets with positioning holes in the middle, after one inspection cycle is completed, if the dimensions of all silicon steel sheets meet the requirements, the inspection system determines whether the silicon steel sheets at the unloading position of the measuring equipment are correctly sorted based on the positioning hole dimensions of all silicon steel sheets in one production cycle. If multiple silicon steel sheets are incorrectly sorted, the correctly sorted silicon steel sheets at the bottom of the measuring equipment's unloading position are the correct sheet group. The correct silicon steel sheets that need to be stacked above the correct sheet group are the sequential sheets. The automatic sorting steps are as follows: S821: Transfer all the silicon steel sheets above the correct sheet group to the transfer table (4) in sequence and stack them; S822: Determine whether the position of the sequence of pieces to be stacked above the correct piece group is on the support platform (51) or on the transfer platform (4); S823: If the sequential sheet is located on the transfer table (4), the silicon steel sheets above the sequential sheet are moved to the support table (51) and stacked. Then the sequential sheet is moved and stacked on top of the correct sheet group. If the sequential sheet is located on the support platform (51), the silicon steel sheets above the sequential sheet are sequentially transported to the transfer platform (4) and stacked, and then the sequential sheet is transported and stacked on top of the correct sheet group; S824: After the sequential wafers are stacked on top of the correct wafer group to form a new correct wafer group, repeat steps S822 and S823 until the number of silicon wafers in the new correct wafer group is the same as the number of silicon wafers in a detection cycle.

5. A machine vision-based online measurement device for the dimensions of silicon steel sheets at cross-cutting lines, characterized in that: The device includes a processor for running the online measurement method for silicon steel sheet dimensions as described in any one of claims 1-4, and also includes a support assembly (1) on which a material handling mechanism (2), a transfer table (4), and a detection platform assembly (5) are provided. The material handling mechanism (2) is provided with a material handling suction cup assembly (24) for gripping silicon steel sheets. The material handling mechanism (2) is used to automatically move the material handling suction cup assembly (24). The transfer station (4) is used to place multiple silicon steel sheets and corresponds to the material pick-and-place suction cup assembly (24); The middle part of the detection platform component (5) is a support platform (51). The support platform (51) is a transparent structure. The support platform (51) is used to place silicon steel sheets. A fixed light source (6) is installed on the support component (1) at the bottom of the support platform (51). A movable light source (7) that moves relative to the support platform (51) is provided between the fixed light source (6) and the support platform (51). A visual inspection mechanism (3) is provided on the material handling mechanism (2). The visual inspection mechanism (3) includes a visual inspection component (32). The visual inspection component (32) corresponds to the upper surface of the silicon steel sheet placed on the support platform (51). The visual inspection component (32) is used to acquire the image of the silicon steel sheet.

6. The online measurement device for the dimensions of silicon steel sheets based on machine vision as described in claim 5, characterized in that: The material handling mechanism (2) includes two X-axis moving modules (21) arranged parallel to each other on the support component (1). An X-axis moving block (211) is provided on the X-axis moving module (21). The X-axis moving module (21) is used to drive the X-axis moving block (211) to move along a horizontal straight line. It also includes a Y-axis moving module (22). The two ends of the Y-axis moving module (22) are fixedly connected to the two X-axis moving blocks (211) respectively. A Y-axis moving block (221) is provided on the Y-axis moving module (22). The Y-axis moving module (22) is used to drive the Y-axis moving block (221) to move along a horizontal straight line. The moving direction of the Y-axis moving block (221) is perpendicular to the moving direction of the X-axis moving block (211). The detection platform component (5) is mounted on the support component (1) between the two X-axis moving modules (21).

7. The online measurement device for the dimensions of silicon steel sheets based on machine vision as described in claim 6, characterized in that: The visual inspection mechanism (3) includes a vertical moving module (31) fixedly installed on the Y-direction moving block (221), and a visual inspection component (32) is provided on the vertical moving module (31). The vertical moving module (31) is used to drive the visual inspection component (32) to move in the vertical direction. The Z-axis moving module (23) is also fixedly installed on the Y-axis moving block (221). The Z-axis moving module (23) is provided with the material pick-and-place suction cup assembly (24). The Z-axis moving module (23) is used to drive the material pick-and-place suction cup assembly (24) to move in the vertical direction.

8. The online measurement device for the dimensions of silicon steel sheets based on machine vision as described in claim 7, characterized in that: The structure of the Z-axis moving module (23) is as follows: it includes a Z-axis bracket (232) fixedly installed on the Y-axis moving block (221), a first motor (233) fixedly installed on the Z-axis bracket (232), a first lead screw rotatably installed on the Z-axis bracket (232) and a first slider (231) slidably installed on the Z-axis bracket (232), the length direction of the first lead screw is consistent with the vertical direction, the first slider (231) is connected to the first lead screw in a transmission, and the material pick-and-place suction cup assembly (24) is fixedly installed on the first slider (231). The structure of the vertical moving module (31) is as follows: it includes a vertical support (312) fixedly installed on the Y-axis moving block (221), a second motor (313) fixedly installed on the vertical support (312), a second lead screw rotatably installed on the vertical support (312), and a second slider (311) slidably installed on the vertical support (312). The length direction of the second lead screw is consistent with the vertical direction, the second slider (311) is connected to the second lead screw in a transmission connection, and the vision detection component (32) is fixedly installed on the second slider (311).

9. The online measurement device for the dimensions of silicon steel sheets based on machine vision as described in any one of claims 5-8, characterized in that: The visual inspection component (32) includes a model discrimination camera (321) and a size inspection camera (322).

10. The online measurement device for the dimensions of silicon steel sheets based on machine vision as described in claim 5, characterized in that: The structure of the detection platform component (5) is as follows: it includes a platform bracket (54), which is fixedly installed on the support component (1). The support platform (51) is fixedly installed on the platform bracket (54). Slide rails (52) are installed on both sides of the platform bracket (54). A horizontal slider (53) is slidably installed on the slide rails (52). A horizontal drive mechanism (8) is installed on one side of the platform bracket (54). The horizontal drive mechanism (8) includes a drive motor fixedly installed on the platform bracket (54) and a horizontal lead screw rotatably installed on the platform bracket (54). The output end of the drive motor is connected to the horizontal lead screw, and the horizontal lead screw is connected to the horizontal slider (53). The end of the movable light source (7) is fixedly connected to the horizontal slider (53).

Images