Roundness detection method, detection system, detection device, medium and electronic equipment

Abstract

The invention relates to a roundness detection method, a roundness detection system, a roundness detection device, a medium and electronic equipment. The method comprises the following steps: acquiring three-dimensional contour data of a circle of a tire on line, and processing the three-dimensional contour data to obtain three-dimensional data representing a circle of tire area; data of corresponding positions needing to be detected are extracted from the data of the circle of tire area, the distances between all adjacent space points in the data are calculated, all the distances are summed, and the sum value is the tire perimeter; the maximum value and the minimum value representing the tire thickness are extracted from the data of the circle of tire area, and a surface run-out value is obtained after processing; and judging the roundness of the tire according to the perimeter and the surface runout value of the tire. Compared with the existing manual measurement technology, the device has the following remarkable advantages that unqualified tires can be effectively screened out, the waste tire rate is reduced, and the tire forming quality is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of tire detection, and particularly relates to a roundness detection method, a detection system, a detection device, a medium and an electronic device. Background Art

[0002] In the prior art, the circumference of the tire surface is measured manually with a flexible ruler, and the surface runout cannot be accurately measured. Only by observing the whole tire manually can it be determined whether there is a large deformation. This measurement method has a large error, and different operators may obtain different results. Moreover, when observing the deformation, there are also significant differences in the observation results. In addition, manual measurement can only measure the first tire, and subsequent tires cannot be continuously measured online. And the runout measurement of all tires cannot be determined manually at all. When calculating based on the manual measurement results, due to the inaccurate measurement results, the calculated results also have a large error. Therefore, the existing manual measurement methods can neither ensure the forming quality of the tires nor obtain effective data for analysis and improvement. Therefore, there is an urgent need to study a roundness detection method, a detection system, a detection device, a medium and an electronic device. Summary of the Invention

[0003] In order to overcome the above problems existing in the prior art, the present invention provides a roundness detection method, a detection system, a detection device, a medium and an electronic device to solve the above problems existing in the prior art.

[0004] A roundness detection method includes detecting the circumference and surface runout of a tire, and the method comprises the following steps: S1. Obtain the three-dimensional contour data of one week of the tire online, and after processing, obtain the three-dimensional data representing the tire area of one week. S2. Extract the data of the corresponding positions to be detected from the data of the tire area of one week, calculate the distances between all adjacent spatial points in the data, and sum all the distances. The sum value is the circumference of the tire. S3. Extract the maximum and minimum values representing the tire thickness from the data of the tire area of one week, and after processing, obtain the surface runout value. S4. Judge the roundness of the tire according to the tire circumference and the surface runout value.

[0005] In the above aspect and any possible implementation manner, a further implementation manner is provided. The S1 further includes: removing the data of the non-tire area from the three-dimensional contour data by using gradient filtering to obtain the three-dimensional data representing the tire area of one week.

[0006] For the aspects and any possible implementation manners described above, a further implementation manner is provided. Each spatial point of the three-dimensional data is represented by (x, y, z), where x represents the tire width direction, y represents the tire circumferential direction, and z represents the tire thickness direction.

[0007] For the aspects and any possible implementation manners described above, a further implementation manner is provided. The data of the corresponding position to be detected includes n spatial points, and the adjacent spatial points form n - 1 point spacings. Calculate and sum all the point spacings, where n is a positive integer greater than or equal to 2.

[0008] For the aspects and any possible implementation manners described above, a further implementation manner is provided. S3 includes taking the difference between the maximum z value and the minimum z value of the tire thickness, and the obtained difference is the surface maximum runout value.

[0009] For the aspects and any possible implementation manners described above, a further implementation manner is provided. It further includes S5. Taking the z values of all spatial points as the tire radius values and drawing a tire runout curve graph.

[0010] The present invention further provides a roundness detection system for implementing the method described above. The system includes a 3D camera, a processing device, and a tire forming machine, where The 3D camera is arranged at the tire forming machine station and is fixed obliquely above the periodic tire through a gantry for online collecting and scanning the tire to obtain the three-dimensional contour data of one week of the tire; The processing device is used to obtain the three-dimensional contour data scanned by the 3D camera, determine all spatial points from the contour data, and obtain the tire circumference and surface runout values for detecting roundness after processing all the spatial points.

[0011] The present invention further provides a roundness detection device including detecting the circumference and surface runout of a tire. The device is used to implement the method described above. The device includes: An acquisition module for online acquiring the three-dimensional contour data of one week of the tire and obtaining the data representing the one-week tire area after processing; A first calculation module for extracting the data of the corresponding position to be detected from the data of the one-week tire area, calculating the distances between all adjacent spatial points in the data, and summing all the distances. The sum value is the tire circumference; A second calculation module for extracting the maximum and minimum values representing the tire thickness from the data of the one-week tire area and obtaining the surface runout value after processing; A judgment module for judging the roundness of the tire according to the tire circumference and surface runout values.

[0012] The present invention also provides a computer storage medium, on which a computer program is stored, and the computer program is executed by a processor to implement the method described above.

[0013] The present invention also provides an electronic device, which includes: a memory storing executable instructions; a processor that runs the executable instructions in the memory to implement the method described above.

[0014] Advantages of the present invention Compared with the prior art, the present invention has the following beneficial effects: The roundness detection method of the present invention includes detecting the circumference and surface runout of a tire. The method includes the following steps: obtaining three-dimensional contour data of one week of the tire online, and after processing, obtaining three-dimensional data representing the tire area of one week; extracting data at corresponding positions to be detected from the data of the tire area of one week, calculating the distances between all adjacent spatial points in the data, and summing all the distances, and this sum value is the circumference of the tire; extracting the maximum and minimum values representing the tire thickness from the data of the tire area of one week, and after processing, obtaining the surface runout value; judging the roundness of the tire according to the tire circumference and the surface runout value. Compared with the existing manual measurement technology, the present invention has the following remarkable advantages: it can effectively screen out unqualified tires, reduce the waste tire rate, and improve the tire forming quality; and it can completely collect tire forming data, and improve the forming process and the parameter ratio of the forming machine equipment by analyzing the data. Description of the drawings

[0015] Figure 1 It is a preparation flow chart of the present invention. Specific embodiments

[0016] To better understand the technical solution of the present invention, the content of the present invention includes but is not limited to the specific embodiments below. Similar technologies and methods should be regarded as within the scope of protection of the present invention. To make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will be described in detail with reference to the drawings and specific embodiments.

[0017] It should be clear that the embodiments described in the present invention are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts belong to the scope of protection of the present invention.

[0018] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0019] like Figure 1 As shown, the present invention provides a roundness detection method, including detecting the circumference and surface runout of a tire, the method comprising the following steps: S1. Obtaining the three-dimensional profile data of the tire for one week online, and processing it to obtain three-dimensional data representing the tire area for one week; S2. Extract the data of the corresponding position to be detected from the data of the tire area for one week, calculate the distance between all adjacent spatial points in the data, and sum all the distances, the sum is the tire circumference; S3 extracts the maximum and minimum values ​​of the tire thickness from the data of the tire area for one week, and obtains the surface runout value after processing; S4. Determine the roundness of the tire based on the tire circumference and the surface runout value.

[0020] As a disclosed embodiment, the S1 further includes: using gradient filtering to remove data of non-tire areas from the three-dimensional contour data to obtain three-dimensional data representing a circumference of the tire area.

[0021] As a disclosed embodiment, each spatial point of the three-dimensional data is represented by (x, y, z), wherein x represents the tire width direction, y represents the tire circumference direction, and z represents the tire thickness direction.

[0022] As a disclosed embodiment, the data of the corresponding position to be detected includes n spatial points, and adjacent spatial points form n-1 point spacings. All point spacings are calculated and summed, and n is a positive integer greater than or equal to 2.

[0023] As a disclosed embodiment, S3 includes subtracting the maximum z value and the minimum z value of the tire thickness, and the obtained difference is the maximum surface runout value.

[0024] As a disclosed embodiment, the S4 includes setting a threshold value in advance, comparing the calculated tire circumference and surface runout value with the respective set threshold values, judging the roundness of the tire based on the comparison results, and screening out unqualified tires based on the judgment results, thereby reducing the scrap tire rate and improving the tire molding quality.

[0025] As a disclosed embodiment, it also includes S5. Taking the z values ​​in all spatial points as tire radius values, and drawing a tire jump curve graph.

[0026] The specific implementation process of the present invention is as follows: The present invention scans the three-dimensional data of the entire tire using a 3D camera to construct a three-dimensional model, thereby calculating the circumference and surface runout of the tire. The steps are as follows: Step 1: Use a 3D camera to collect the three-dimensional data of one week of the tire. The 3D camera is placed at the tire forming station and fixed obliquely above the periodic tire through a gantry. The laser of the 3D camera is incident perpendicular to the axis of the forming drum, ensuring that the distance between the camera and the drum axis is fixed at 800 mm. The acquisition process is to scan the contour data of one week of the tire online and process it in real time online; Step 2: Analyze the three-dimensional data, extract the data representing the tire, and remove other interferences. The obtained contour data contains data of some non-tire areas, which have an impact on the later detection. Therefore, the data of the non-tire areas is removed using the gradient filtering method, and the data of the tire area is retained for later use. Among them, the gradient filtering method is a commonly used processing method, and the specific operation method will not be elaborated here.

[0027] Step 3: Extract the data representing the position of one week of the tire from the data representing the tire area. The scanned data of the tire is the entire tire surface, while the actual position to be detected is usually the column at the center of the tire (i.e., the center of the surface), or a certain position specified by the customer. Therefore, the column of data to be detected and analyzed (i.e., the data of this column is the data at the center of the surface or a column of data at other positions specified by the customer) is extracted for later calculation; Step 4: The extracted column of data includes multiple spatial point positions. Calculate the distance between adjacent two spatial points according to these spatial point positions. For example, if the extracted column of data includes n spatial point positions, then calculate the distance between two adjacent spatial points, and then obtain the n - 1 point distances between all adjacent spatial points, where n is greater than or equal to 2.

[0028] Step 5: Sum up the distances between all adjacent spatial points, which is the circumference of the tire. For example, accumulate the n - 1 point distances obtained in Step 4, and the obtained summation result is the circumference length of the tire; Step 6: The spatial position points in the data are represented in a three-dimensional coordinate system, i.e., (x, y, z). x represents the data in the tire width direction, y represents the data in the tire circumference direction, and z represents the data in the tire thickness direction. In this step, according to the z-direction data of the spatial position points in the one-week position data, extract the data with the maximum and minimum z values in the one-week position data of the tire as the maximum and minimum values of the tire thickness, and use the maximum and minimum values in the tire thickness data as the highest and lowest points of the tire surface runout; Step 7: Subtract the minimum value from the maximum value in the tire thickness data obtained in Step 6, which is the maximum surface runout value. When the runout value is below the set threshold, it indicates that the roundness of the tire is qualified. Therefore, it is used as one of the detection dimensions.

[0029] Step 8: According to the z-values of all the spatial position points in the extracted tire one-week position data and their positions in the camera space (i.e., the positions of the spatial points corresponding to the z-values in the camera space), convert all the z-values in the current column into tire radius values for drawing the tire radius fluctuation curve later, that is, use the value obtained by converting the z-value of the spatial position point through the camera coordinate system as the tire radius value; Step 9: Plot the tire radius values as a curve, which is the tire runout curve. The maximum surface runout value obtained in the previous step 7 is a relative value. The tire runout curve in this step is to perform a spatial conversion on the maximum surface runout in step 7 to convert it into a tire radius, which is used to characterize the tire radius information. The surface runout is the change in the depth value of the tire outer surface. Through this spatial conversion, the surface runout value can be converted into a radius value. When the radius values are all the same or individual radius values are within the allowable error range, it indicates that the tire roundness is qualified.

[0030] The present invention scans the three-dimensional data of the entire tire using a 3D camera, constructs a three-dimensional model (i.e., the image display of the spatial three-dimensional coordinate points), thereby calculating the tire circumference, surface runout value, and tire runout curve. The entire process is simple to calculate and the obtained results are accurate.

[0031] As an embodiment disclosed by the present invention, the present invention also provides a roundness detection system for implementing the method. The system includes a 3D camera, a processing device, and a tire forming machine, wherein, The 3D camera is arranged on the tire forming machine station and is fixed obliquely above the periodic tire through a gantry for online collecting and scanning the tire to obtain the three-dimensional contour data of the tire for one week; The processing device is used to obtain the three-dimensional contour data scanned by the 3D camera, determine all the spatial points from the contour data, process all the spatial points, remove the data of the non-tire area to obtain the data of the tire area, and perform calculation and processing on the data of the tire area to obtain the tire circumference, surface runout value, and runout curve for detecting roundness.

[0032] As an embodiment disclosed by the present invention, the present invention also provides a roundness detection device for detecting the circumference and surface runout of a tire. The device is used to implement the method. The device includes: An acquisition module for online acquiring the three-dimensional contour data of the tire for one week and obtaining the data representing the tire area for one week after processing; A first calculation module for extracting the data of the corresponding positions to be detected from the data of the tire area for one week, calculating the distances between all adjacent spatial points in the data, and summing up all the distances. The sum value is the tire circumference; A second calculation module, configured to extract the maximum and minimum values representing the tire thickness from the data of the one-week tire area, and obtain a surface runout value after processing; A judgment module, configured to judge the roundness of the tire according to the tire circumference and the surface runout value.

[0033] As an embodiment disclosed by the present invention, the present invention further provides a computer storage medium, on which a computer program is stored, and the computer program is executed by a processor to implement the method described above.

[0034] As an embodiment disclosed by the present invention, the present invention further provides an electronic device, which includes: A memory, storing executable instructions; A processor, the processor running the executable instructions in the memory to implement the method described above.

[0035] The above description shows and describes several preferred embodiments of the present invention. However, as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be within the scope of the application concept described herein, and can be modified by the above teachings or the technology or knowledge in the relevant field. And any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims

1. A roundness detection method, comprising detecting the circumference and surface runout of a tire, characterized in that: The method comprises the following steps: S1. Obtaining the three-dimensional profile data of the tire for one week online, and processing it to obtain three-dimensional data representing the tire area for one week; S2. Extract the data of the corresponding position to be detected from the data of the tire area for one week, calculate the distance between all adjacent spatial points in the data, and sum all the distances, the sum is the tire circumference; S3 extracts the maximum and minimum values ​​of the tire thickness from the data of the tire area for one week, and obtains the surface runout value after processing; S4. Determine the roundness of the tire based on the tire circumference and the surface runout value.

2. The roundness detection method according to claim 1, characterized in that: The step S1 further includes: removing data of non-tire areas from the three-dimensional contour data by using gradient filtering to obtain three-dimensional data representing a circumference of the tire area.

3. The roundness detection method according to claim 2, characterized in that: Each spatial point of the three-dimensional data is represented by (x, y, z), wherein x represents the tire width direction, y represents the tire circumference direction, and z represents the tire thickness direction.

4. The roundness detection method according to claim 2, characterized in that: The data of the corresponding position to be detected includes n spatial points, and adjacent spatial points form n-1 point spacings. All point spacings are calculated and summed, and n is a positive integer greater than or equal to 2.

5. The roundness detection method according to claim 3, characterized in that: The step S3 includes subtracting the maximum z value and the minimum z value of the tire thickness, and the obtained difference is the maximum surface runout value.

6. The roundness detection method according to claim 3, characterized in that: The invention also includes S5. converting the z values ​​of all the space points into tire radius values ​​through the camera coordinate system, and drawing a tire runout curve diagram.

7. A roundness detection system, characterized in that: The system is used to implement the method described in any one of claims 1 to 6, and the system includes a 3D camera, a processing device and a tire building machine, wherein: The 3D camera is arranged on the tire building machine station and fixed obliquely above the cycle tire through a gantry, and is used to collect and scan the tire online to obtain the three-dimensional profile data of the tire for one week; The processing device is used to obtain the three-dimensional contour data obtained by scanning with the 3D camera, determine all spatial points from the contour data, and obtain the tire circumference and surface runout value for detecting roundness after processing all spatial points.

8. A roundness detection device, comprising detecting the circumference and surface runout of a tire, characterized in that: The device is used to implement the method according to any one of claims 1 to 7, and the device comprises: An acquisition module is used to acquire the three-dimensional profile data of a tire around the circle online, and obtain data representing the tire area around the circle after processing; A first calculation module is used to extract data of corresponding positions to be detected from the data of the tire area around the tire, calculate the distances between all adjacent spatial points in the data, and sum all the distances, and the sum is the tire circumference; A second calculation module is used to extract the maximum and minimum values ​​representing the tire thickness from the data of the tire area around the circle, and obtain the surface runout value after processing; The judging module is used to judge the roundness of the tire according to the tire circumference and the surface runout value.

9. A computer storage medium, characterized in that The medium stores a computer program, and the computer program is executed by a processor to implement the method according to any one of claims 1 to 7.

10. An electronic device, characterized in that: The electronic device comprises: A memory storing executable instructions; A processor, wherein the processor runs the executable instructions in the memory to implement the method according to any one of claims 1 to 7.

Images