Tire contour digital holographic image scanning analysis working method and system and medium

Abstract

The invention provides a tire contour digital holographic image scanning analysis working method and system and a medium, and the method comprises the steps: S1, starting scanning equipment, scanning an outer side tread, and then scanning a tire inner ring of an inner ring; s2, importing scanned tire data into a holographic size generation model, and executing a scanned file importing instruction to form a readable model file; s3, aligning the tire contour data, and selecting an optimal fitting measurement object to perform modulus fitting operation; s4, measuring features are selected through the list directory tree, input feature options in the menu bar are executed, a deviation vector instruction is executed, and therefore errors are adjusted; and S5, executing a report table creating instruction, selecting a feature position needing to be displayed, and generating a digital holographic image containing data of the tire contour size through a display terminal.

Description

Technical Field

[0001] The present invention relates to the field of digital analysis, and particularly to a working method, system and medium for digital holographic image scanning and analysis of tire profiles. Background Art

[0002] In the tire manufacturing industry, the accuracy of tire profile dimensions and tread patterns has a crucial impact on tire performance, safety and service life. With the progress of technology and the wide application of digital technologies, the working method of digital holographic image scanning and analysis of tire profiles has gradually become the mainstream technology in the industry. However, in the actual application process, this technology still faces many challenges and technical problems.

[0003] Traditional tire profile scanning methods often rely on manual measurement and simple scanning equipment, which are not only inefficient, but also difficult to ensure the accuracy and consistency of measurement. With the complexity and diversity of tire designs, traditional scanning methods have been difficult to meet the high-precision requirements of modern tire manufacturing. How to ensure the accurate alignment of scanned data to form a complete tire model is a difficult point in tire profile scanning technology. At the same time, the complexity and diversity of tire tread patterns also pose great challenges to the fitting process. How to perform scanning fusion for different tread patterns to form a tire tread pattern profile with dimensions, so in the process of processing and analyzing tire profile scanning data, how to efficiently extract and interpret useful information, how to simplify the data processing process and improve processing efficiency are the problems that need to be solved in tire profile scanning technology. Summary of the Invention

[0004] The present invention aims to at least solve the technical problems existing in the prior art, and particularly innovatively provides a working method, system and medium for digital holographic image scanning and analysis of tire profiles.

[0005] To achieve the above object of the present invention, the present invention provides a working method for digital holographic image scanning and analysis of tire profiles, including the following steps:

[0006] S1, start the scanning device, scan the outer tread, and then scan the inner tire ring of the inner circle;

[0007] S2, import the scanned tire data into the holographic dimension generation model, execute the scanning file import instruction to form a readable model file;

[0008] S3, align the tire profile data, and select the best fitting measurement object for modulus fitting operation;

[0009] S4, select the measurement feature through the list directory tree, execute the input feature option in the menu bar, and execute the deviation vector instruction to adjust the error;

[0010] S5. Execute the instruction to create a report form, select the feature positions to be displayed, and generate a digital holographic image containing data on the tire contour dimensions through the display terminal.

[0011] Preferably, in the above technical solution, S2 includes:

[0012] S2-1. After selecting and completing the coordinate system according to the dimensional requirements and design requirements of the tire contour, create three coordinate axes of x, y, and z, set the attributes of the tire length scale, dimension unit, and tire measurement contour direction; determine the origin position on the workpiece and the reference elements related to the coordinate axes, such as holes, bosses, etc., and add them to the tire as the origin. Among them, the holographic dimension generation model can quickly obtain the positions and dimensions of the fixing holes by establishing a coordinate system with the axial direction of the tire as the Z axis, the coordinate origin as the center point of the tire, and the coordinate origin as the wheel disc side of the tire hub. Take the fixing hole farthest from the origin on the tire as the X axis. Since there are two or more fixing holes farthest from the origin, it is necessary to first enter the dimensional data of the fixing holes farthest from the origin.

[0013] Preferably, in the above technical solution, S2 further includes:

[0014] S2-2. Set the coordinate origin as the center point of the tire, and all calculations regarding the tire dimensions and positions will be based on this reference point, thus ensuring the consistency and accuracy of the calculations. With the origin as the center, it is convenient to calculate the distances from each point on the tire to the origin, and then determine the positions and dimensions of the fixing holes;

[0015] S2-3. In the holographic dimension generation model, it is crucial to quickly and accurately obtain the positions and dimensions of the fixing holes. By setting a reasonable origin, the efficiency of data processing can be significantly improved. For the position features of the tire hub, use the corresponding reference elements to establish its feature coordinate system and map it to the workpiece coordinate system.

[0016] Preferably, in the above technical solution, S3 includes:

[0017] S3-1. Convert the alignment method to point pairs through overall best fit, perform overall best fit by selecting the calibration of the starting point position, use the filtering instruction to denoise the imported tire contour data and remove the noise points generated during the scanning process. If the scanning data is divided into multiple parts, use the alignment tool of PolyWorks to accurately align the sequentially scanned parts together to form a complete tire model.

[0018] Preferably, in the above technical solution, S3 further includes:

[0019] S3-2. Select the scanned feature object, use the measurement feature instruction to create a feature option, obtain the feature list through the pop-up dialog box, and thus create the selection of the maximum fixed screw hole feature points on the tire contour.

[0020] Since on industrial tires, the fixed hole positions are the most easily recognizable feature points, which are different from the circular symmetric structures of the outer and inner wheels of the tire.

[0021] Then, create the minimum fixed screw holes, lines or surfaces in sequence as the reference positions for fitting, and then select the outer contour line, inner contour line, and tread pattern in sequence. During the fitting process, scan and fuse for different tread patterns.

[0022] Due to the differences in the tread patterns of different industrial tire contours, use the initially scanned individual tread pattern segments as seeds, record the dimensions of the individual tread pattern segments to form the boundary contour dimensions of the upper and lower limits in the three dimensions of the X, Y, and Z axes, establish an initial scan record, obtain the number and layout of the individual tread pattern segments through scanning, and fuse the boundary contour dimensions with the obtained number and layout of the individual tread pattern segments, thereby forming a tire tread pattern contour with dimensions; number and record the tire tread pattern contour with dimensions, and save it.

[0023] S3-3. When scanning the tire contour again; obtain the data of the individual tread pattern segments and match them with the scanned tire contour, and extract the tire tread pattern data with matching numbers.

[0024] The present invention also discloses a computer system, including:

[0025] A processor;

[0026] A memory for storing instructions executable by the processor;

[0027] Wherein, when the processor is configured to execute the executable instructions, it implements the tire contour digital holographic image scanning and analysis working method according to any one of claims 2 to 5.

[0028] The present invention also discloses a computer-readable storage medium, including:

[0029] A memory with a computer program stored thereon;

[0030] A processor for executing the program in the memory to implement the tire contour digital holographic image scanning and analysis working method according to any one of claims 2 to 5.

[0031] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are:

[0032] Through comprehensive scanning steps (S1) and alignment and fitting operations (S3), this method can accurately capture the details of the tire contour, including the outer tread, the inner tire ring of the inner circle, and the tread pattern, etc. The establishment of the holographic dimension generation model (S2) and the reasonable setting of the coordinate system provide an accurate basis for subsequent dimension calculation and position determination, significantly improving the efficiency of data processing. By executing the instruction to create a report form (S5), this method can generate a digital holographic image containing the tire contour dimension data, making the scanning results more intuitive and easy to understand, and enhancing the visualization effect of the data. Numbering and recording the tire tread pattern contour with dimensions and saving it (S3-2) ensure the traceability of the data, facilitating subsequent data analysis and comparison. Using the alignment tool of PolyWorks (S3-1), this method can accurately align multiple scanned parts together to form a complete tire model, ensuring the integrity of the model. Through overall best fitting and denoising processing (S3-1), and the scanning fusion for different tread patterns (S3-2), this method can handle the complex and variable tire contour features, maintaining the consistency of the data. This method is applicable to industrial tires of different types and sizes. By adjusting the scanning parameters and fitting options, it can flexibly adapt to the contour features of different tires, with strong adaptability. The tread pattern scanning fusion technology (S3-2) and the matching process (S3-3) in the method are extended to the scanning and analysis of other objects with complex patterns or structures, having a wide range of application prospects.

[0033] This working method for scanning and analyzing the digital holographic image of the tire contour improves the accuracy of scanning and analysis, enhances the efficiency of data processing, and improves the integrity and consistency of the model.

[0034] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Brief Description of the Drawings

[0035] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0036] Figure 1 is the general schematic diagram of the present invention;

[0037] Figure 2 is the schematic diagram of contour scanning of the present invention;

[0038] Figure 3 is the schematic diagram of marking the digital contour of the present invention;

[0039] Figure 4 is the schematic diagram of cross-section specification marking of the present invention;

[0040] Figure 5 It is a schematic diagram of the radian specification of the present invention;

[0041] Figure 6 It is a schematic diagram of the texture specification of the present invention;

[0042] Figure 7 It is a schematic diagram of the generation of digital scanned images of the present invention. Detailed implementation manners

[0043] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as limiting the present invention.

[0044] As Figures 1 to 7 shown, the present invention discloses a working method for digital holographic image scanning and analysis of tire profiles, including the following steps:

[0045] Scan the tire with a profile scanner. After the scanning is completed, store the scanned file as an STL format file.

[0046] S1. Especially during the process of scanning the tire, since the tire is circular, it is necessary to first scan the outer tread and then scan the inner tire ring of the inner circle.

[0047] The process of analyzing the tire size: (The analysis software is PolyWorks)

[0048] First, adjust the scanning speed of the tire according to the tire width to ensure that the pattern is scanned completely and accurately, and then scan the inner circle of the tire according to the load index, speed rating and wheel diameter of the tire.

[0049] S2. Import the scanned tire data into the holographic size generation model, execute the scanning file import instruction to form a readable model file, such as forming a CAD model (such as.STEP,.igs format) and the scanned triangulated model (.stl format);

[0050] S2-1. After selecting and completing the coordinate system according to the dimensional requirements and design requirements of the tire contour, create three coordinate axes, namely x, y, and z, and set the attributes of the tire length scale, dimension unit, and tire measurement contour direction. Determine the origin position on the workpiece and the reference elements related to the coordinate axes, such as holes, bosses, etc., and add them to the tire as the origin. Among them, the holographic dimension generation model can quickly obtain the position and size of the fixed holes by establishing a coordinate system with the axial direction of the tire as the Z-axis, the coordinate origin as the center point of the tire, and the coordinate origin as the wheel disc side of the tire hub. Take the fixed hole farthest from the origin as the X-axis. Since there are two or more fixed holes farthest from the origin, it is necessary to first input the dimensional data of the fixed holes farthest from the origin.

[0051] S2-2. Setting the coordinate origin as the center point of the tire (the wheel disc side of the hub) provides a clear reference point for the entire model. All calculations regarding the tire dimensions and positions will be based on this reference point, thus ensuring the consistency and accuracy of the calculations. With the origin as the center, it is convenient to calculate the distances from various points on the tire to the origin, and then determine the positions and sizes of the fixed holes.

[0052] S2-3. In the holographic dimension generation model, it is crucial to quickly and accurately obtain the positions and sizes of the fixed holes. By setting a reasonable origin, the efficiency of data processing can be significantly improved. For the position features of the tire hub, use the corresponding reference elements to establish its feature coordinate system and map it to the workpiece coordinate system.

[0053] S3. Align the tire contour data and select the best-fit measurement object. There are two methods: local best fit and global best fit.

[0054] S3-1. Convert the alignment method to point-to-point through global best fit. Execute global best fit by selecting the calibration of the starting point position. Use the filtering instruction to denoise the imported tire contour data and remove the noise points generated during the scanning process to improve the accuracy of the data. If the scanned data is divided into multiple parts (such as the outer tread and the inner hub), use the alignment tool in PolyWorks to accurately align the sequentially scanned parts together to form a complete tire model.

[0055] Through the global best fit method, select the fitting algorithms for the overall shape and size of the tire, such as the least squares method and nonlinear fitting.

[0056] According to the specific characteristics of the tire, set the fitting algorithm and use the mean squared error loss function.

[0057]

[0058] y i is the actual scanned value, ωxi +b is the predicted value of the fit, n is the number of scan points, ω is the slope, b is the intercept, and x i is the input value; the goal of the gradient descent method is achieved by iteratively updating the parameters ω and b to minimize the loss function J(ω, b),

[0059]

[0060] where α is the learning rate, is the partial derivative of the loss function with respect to ω, is the partial derivative of the loss function with respect to b. Continue to calculate the new partial derivatives and update the parameters until the maximum number of iterations is reached.

[0061] Set the maximum number of iterations to 1000 times. After each iteration, we calculate the new value of the loss function and compare it with the value of the loss function in the previous iteration to determine whether the convergence condition is met.

[0062] S3-2. Select the scanned feature object, use the measurement feature instruction to create a feature option, and obtain the feature list through the pop-up dialog box, so as to create the selection of the maximum fixed screw hole feature points on the tire contour,

[0063] Since on industrial tires, the fixed hole position is the most easily recognizable feature point, different from the circular symmetric structure of the outer and inner wheels of the tire.

[0064] Then create the minimum fixed screw hole, line or surface in sequence as the reference position for fitting, and then select the outer contour line, inner contour line, and tread pattern in sequence. During the fitting process, scan and fuse different tread patterns;

[0065] According to the differences in the tread patterns of different industrial tire contours, use the initially scanned individual tread pattern segments as seeds, record the dimensions of the individual tread pattern segments to form the boundary contour dimensions of the upper and lower limits in the three dimensions of the X, Y, and Z axes, establish an initial scan record, obtain the number and layout of individual tread pattern segments through scanning, and fuse the boundary contour dimensions with the number and layout of the obtained individual tread pattern segments to form a tire tread pattern contour with dimensions; number and record the tire tread pattern contour with dimensions and save it;

[0066] S3-3. When scanning the tire contour again; obtain the data of individual tread pattern segments and match them with the scanned tire contour, and extract the tire tread pattern data with matching numbers,

[0067] S3-4. Scanning in the above order can make the scanning process more orderly and efficient. The scanning device can move along a predefined path, reducing unnecessary repeated scanning and movement, thereby improving the scanning efficiency. The orderly scanning order helps to simplify the subsequent data processing process. Since the scanning data is organized in a certain logical order, it is easier to extract and interpret useful information when performing data processing and analysis.

[0068] S4. Select the measurement feature through the list directory tree, execute the option of entering features in the menu bar, execute the deviation vector instruction, and then respectively execute to display the minimum deviation and the maximum deviation to view the maximum and minimum values of the surface analysis result. According to Figure 5 、 6 and the content shown in Figure 7, the corresponding deviation content can be seen.

[0069] Then select the feature object in the directory tree, execute the instruction of the attributes of the entered feature, and respectively execute to identify the minimum deviation value and the maximum deviation value in the display option to view the extreme values;

[0070] S5. Execute the instruction to create a report table, select the feature position to be displayed, present the scanning measurement results in tabular form, generate a digital holographic image containing the data of the tire contour dimensions through the display terminal, and through executing the report generation instruction, perform typesetting and annotation editing on the report, such as adjusting the font, color, adding annotations, etc., to make the report clearer and more beautiful. Execute the instruction to export the report in PDF format to form a paper file for storage and sharing.

[0071] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A tire profile digital holographic image scanning and analysis working method, characterized in that: The steps include: S1, start the scanning device, scan the outer tread, and then scan the inner ring of the tire; S2, importing the scanned tire data into the holographic size generation model, executing the scan file import instruction, and forming a readable model file; S3, aligning the tire profile data and selecting the best fitting measurement object to perform a modulus fitting operation; S4, select the measurement feature through the list directory tree, execute the input feature option in the menu bar, and execute the deviation vector command to adjust the error; S5, executing the command of creating a report form, selecting the characteristic position to be displayed, and generating a digital holographic image containing the data of the tire profile size through the display terminal.

2. The tire contour digital holographic image scanning and analysis working method according to claim 1 is characterized in that: The S2 includes: S2-1, according to the size requirements and design requirements of the tire profile, after the coordinate system is selected, create three coordinate axes x, y, and z, set the tire length scale, size unit, and the properties of the tire measurement profile direction; determine the origin position on the workpiece, as well as the reference elements related to the coordinate axis, such as holes, bosses, etc., and add them to the tire as the origin. The holographic size generation model is to establish a coordinate system with the axial direction of the tire as the Z axis, the coordinate origin as the center point of the tire, and the coordinate origin as the wheel disc side of the tire hub, so that the position and size of the fixing hole can be quickly obtained, and the fixing hole farthest from the origin of the tire is obtained as the X axis. Since there are 2 or more fixing holes farthest from the origin, it is necessary to first enter the size data of the fixing hole farthest from the origin.

3. The tire contour digital holographic image scanning and analysis working method according to claim 2 is characterized in that: The S2 further includes: S2-2, set the coordinate origin to the center point of the tire. All calculations on tire size and position will be based on this reference point, thus ensuring the consistency and accuracy of the calculations. With the origin as the center, it is convenient to calculate the distance from each point on the tire to the origin, and then determine the position and size of the fixing hole; S2-3, in the holographic size generation model, it is crucial to quickly and accurately obtain the position and size of the fixing holes. By setting a reasonable origin, the efficiency of data processing can be significantly improved. For the tire wheel position feature, use the corresponding reference element to establish its feature coordinate system and map it to the workpiece coordinate system.

4. The tire contour digital holographic image scanning and analysis working method according to claim 1 is characterized in that: The S3 includes: S3-1, convert the alignment mode into point pairs through overall best fit, perform overall best fit by selecting the calibration of the starting point, use the filtering command to denoise the imported tire profile data and remove the noise points generated during the scanning process. If the scanned data is divided into multiple parts, use the alignment tool of PolyWorks to accurately align the sequentially scanned parts together to form a complete tire model.

5. The tire contour digital holographic image scanning and analysis working method according to claim 1 is characterized in that: The S3 further includes: S3-2, select the scanned feature object, use the measurement feature command to create the feature option, obtain the feature list through the pop-up dialog box, and then create the feature point of the largest fixing screw hole on the tire profile. Because on industrial tires, the location of the fixing holes is the most easily identifiable feature point, which is different from the circular symmetrical structure of the outer and inner wheels of the tire. Then, the minimum fixing screw hole, line or surface is created in turn as the reference position for fitting, and then the outer contour line, inner contour line and tread pattern are selected in turn. During the fitting process, different tread patterns are scanned and fused; According to the differences in tread patterns of different industrial tire profiles, the initial scanned individual pattern segments are used as seeds, the sizes of the individual pattern segments are recorded to form the boundary profile sizes of the upper and lower limits in the three dimensions of the X, Y, and Z axes, and an initial scan record is established. The number and layout of the individual pattern segments are obtained by scanning, and the boundary profile size and the number and layout of the individual pattern segments are merged to form a tire tread pattern profile with size; the tire tread pattern profile with size is numbered and recorded, and saved; S3-3, when the tire profile is scanned again; obtain individual pattern segment data and match them with the scanned tire profile, and extract tire tread pattern data with matching numbers.

6. A computer system, characterized in that: include: processor; a memory for storing processor-executable instructions; Wherein, the processor is configured to implement the tire contour digital holographic image scanning and analysis working method described in any one of claims 2 to 5 when executing the executable instructions.

7. A computer-readable storage medium, characterized in that: include: a memory having a computer program stored thereon; A processor is used to execute the program in the memory to implement the tire contour digital holographic image scanning and analysis working method as described in any one of claims 2 to 5.

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