Regional rolling resistance testing method and device

Abstract

The invention provides a method and device for testing rolling resistance in different areas, and belongs to the technical field of area testing, and the method comprises the steps: 1, selecting a target tire as a test sample, and obtaining the basic parameters of the target tire; 2, performing longitudinal partition treatment on the tread of the target tire to obtain five tread areas, and numbering any tread area; 3, based on the rolling resistance testing equipment and the shielding material, the rolling resistance values of different left side, right side, shoulder and middle tire pattern areas are measured in a grouped mode; and 4, evaluating the resistance of the target tire according to the rolling resistance value in combination with the tire pattern. The test precision is improved, and the tire performance is optimized.

Description

Technical Field

[0001] The present invention relates to the technical field of zone testing, and in particular to a method and device for testing rolling resistance in zones. Background Art

[0002] With the increasing penetration of new energy vehicles, demand for wider tires continues to grow, placing higher demands on tire rolling resistance. Current technology only tests the rolling resistance of the entire tread area, but lacks clarity on the rolling resistance of each longitudinal segment. Automakers and tire suppliers should conduct further research and development in this area to meet market demand for high-performance, environmentally friendly, and safe vehicles.

[0003] Furthermore, optimizing the rolling resistance of high-performance tires with high section widths and low aspect ratios is particularly important. With the rise of new energy electric vehicles, the increased weight of these vehicles has made improving the rolling resistance of tires even more urgent.

[0004] Therefore, the present invention proposes a method and device for testing rolling resistance in different areas. Summary of the Invention

[0005] The present invention provides a method and device for testing rolling resistance in different areas, which measures and studies the rolling resistance of each longitudinal tread block and develops a tire tread structure with lower rolling resistance and better performance.

[0006] In one aspect, the present invention provides a method for testing rolling resistance by region, comprising: Step 1: Select a target tire as a test sample and obtain basic parameters of the target tire; Step 2: Partition the tread of the target tire longitudinally to obtain five tread areas, and number each tread area; Step 3: Using the rolling resistance test equipment and the shielding material, measure the rolling resistance values of the left, right, shoulder, and center tire tread areas in groups. Step 4: Evaluate the resistance of the target tire based on the rolling resistance value and the tire pattern.

[0007] On the other hand, a target tire is selected as a test sample, and basic parameters of the target tire are obtained, including: Clarify the test objectives and select the tire type based on the test objectives; Select representative target tires among tire types as test samples; The basic parameters of the target tire are obtained according to the factory information of the target tire.

[0008] On the other hand, before the tread of the target tire is subjected to longitudinal partitioning processing, the following steps are performed: Based on the image acquisition device, an original image of the tread of the target tire is obtained; Performing grayscale processing on the original tread image to obtain a first image, and mapping the first image to a standard coordinate system; Perform Gaussian filtering on the first image and obtain the gradient of any pixel: ;in, Represents the gradient magnitude of the pixel point (x, y), Represents the grayscale value of the pixel (x, y), Indicates the gradient of the pixel point (x, y) in the x direction, represents the gradient of the pixel point (x, y) in the y direction, and T( ) represents the direction conversion function; Based on the gradient of any pixel point in the first image, a convolution operation is performed in combination with a preset convolution kernel to obtain a smooth pixel point, and a second image is constructed based on all the smooth pixel points; Scanning any adjacent pixel group of a preset size in the second image using a gradient factor, and if the gradient of any pixel point in the adjacent pixel group is not a local maximum, suppressing the gradient of the pixel point to 0 to obtain an extreme value pixel point; The pattern image of the target tire is constructed based on all extreme pixel points.

[0009] On the other hand, the tread of the target tire is partitioned longitudinally to obtain five tread areas, and each tread area is numbered, including: The pattern image is divided into a left shoulder, a right shoulder, and a center pattern according to the basic parameters of the target tire, and the left shoulder and the right shoulder are regarded as the first area and the second area respectively; Conduct symmetry analysis on the central pattern, including central symmetry and axial symmetry; Based on the distribution and symmetry of the central pattern, the central pattern is split from the center point of the image to both sides; According to the preset center width and the preset two side widths, the center pattern is symmetrically divided into a left image, a center image, and a right image, which are regarded as the third area, the fourth area, and the fifth area respectively.

[0010] On the other hand, based on the rolling resistance test equipment and shielding materials, the rolling resistance values of different left, right, shoulder, and middle tire tread areas are measured in groups, including: Select materials that meet the preset performance standards as shielding materials; Cutting the blocking material based on a preset center width, a preset single-side width, and a shoulder width to obtain a first material; Using the first material to block the first and third areas of the target tire to obtain a measurable right area of the tire, and performing a rolling resistance test on the measurable right area of the tire to obtain a first rolling resistance value; The first material is used to block the second area and the fifth area of the target tire to obtain a measurable left area of the tire. A rolling resistance test is performed on the measurable left area of the tire to obtain a second rolling resistance value.

[0011] On the other hand, based on the rolling resistance test equipment and shielding materials, the rolling resistance values of different left, right, shoulder, and middle tire tread areas are measured in groups, including: Cutting the blocking material according to the preset center width, the preset total value of the width on both sides, and the shoulder width to obtain a second material; Using the second material to block the first, third, fourth, and fifth areas of the target tire to obtain a measurable right shoulder area of the tire, and performing a rolling resistance test on the measurable right shoulder area of the tire to obtain a third rolling resistance value; Using the second material to block the second, third, fourth, and fifth areas of the target tire to obtain a measurable left shoulder area of the tire, and performing a rolling resistance test on the measurable left shoulder area of the tire to obtain a fourth rolling resistance value; Cutting the blocking material according to the preset center width, the preset two side widths and the shoulder width to obtain a third material; The first area, the second area, the third area, and the fifth area of the target tire are blocked with the third material to obtain a measurable center area of the tire. A rolling resistance test is performed on the measurable center area of the tire to obtain a fifth rolling resistance value.

[0012] On the other hand, evaluating the resistance of the target tire according to the rolling resistance value in combination with the tire tread pattern includes: According to the five rolling resistance values of the target tire and the tire pattern, the resistance of the target tire is calculated as: ;in, represents the resistance of the target tire, represents the preset weight coefficient of the i-th rolling resistance value, Indicates the standard tire rolling resistance coefficient, Indicates the influence factor of tire material on rolling resistance, Indicates the pattern ratio of the rolling resistance area corresponding to the i-th rolling resistance value, represents the rated load gravity of the target tire, f( ) represents the load function, Indicates the rolling resistance coefficient corresponding to the speed v in the rolling resistance test equipment, represents the conversion coefficient related to the speed ratio, Indicates the specified standard speed of the target tire; If the target tire resistance is greater than the preset resistance, it is determined that the target tire pattern is unqualified; otherwise, it is determined that the target tire pattern is qualified.

[0013] In another aspect, the present invention provides a device for testing rolling resistance in different regions, comprising: Basic parameter module: selects a target tire as a test sample and obtains the basic parameters of the target tire; Partitioning module: partitions the tread of the target tire longitudinally to obtain five tread areas, and numbers each tread area; Measurement module: Based on the rolling resistance test equipment and shielding materials, the rolling resistance values of the left, right, shoulder, and middle tire tread areas are measured in groups; Evaluation module: evaluates the resistance of the target tire according to the rolling resistance value.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a method and device for testing rolling resistance in different areas, which measures and studies the rolling resistance of each longitudinal tread block and develops a tire tread structure with lower rolling resistance and better performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 1 is a flow chart of a method for testing rolling resistance in different regions provided by an embodiment of the present invention; Figure 2 1 is a schematic structural diagram of a device for testing rolling resistance in different regions provided by an embodiment of the present invention; Figure 3 This is a schematic diagram of the five areas after vertical partitioning; Figure 4 This is a schematic diagram of the measurable right side area of the tire; Figure 5 This is a schematic diagram of the measurable left side area of the tire; Figure 6 This is a schematic diagram of the measurable right shoulder area of the tire; Figure 7 This is a schematic diagram of the measurable center area of the tire. DETAILED DESCRIPTION

[0017] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0018] Example 1: like Figure 1 As shown, the method for testing rolling resistance in different regions provided by an embodiment of the present invention includes: Step 1: Select a target tire as a test sample and obtain basic parameters of the target tire; Step 2: Partition the tread of the target tire longitudinally to obtain five tread areas, and number each tread area; Step 3: Using the rolling resistance test equipment and the shielding material, measure the rolling resistance values of the left, right, shoulder, and center tire tread areas in groups. Step 4: Evaluate the resistance of the target tire based on the rolling resistance value and the tire pattern.

[0019] In this embodiment, the target tire refers to a specific tire used as a sample in the test.

[0020] In this embodiment, the basic parameters refer to the basic characteristics and specifications of the tire, including tire size, tire model, load index, etc.

[0021] In this embodiment, the longitudinal partitioning process refers to dividing the tire tread along the longitudinal direction (ie, parallel to the tire driving direction).

[0022] In this embodiment, the tread area refers to the portion of the tire that contacts the ground, that is, the surface pattern area of the tire.

[0023] In this embodiment, numbering refers to assigning a specific number to the five partitioned areas of the tire.

[0024] In this embodiment, Figure 3 As shown, the five tread areas after partitioning are shown in the figure.

[0025] In this embodiment, the rolling resistance testing device measures the rolling resistance by simulating the actual situation of the tire contacting the ground using a dedicated test wheel and ground material.

[0026] In this embodiment, the shielding material is selected from materials with low friction coefficient, high and low temperature resistance, and strong plasticity, such as polytetrafluoroethylene (with a friction coefficient of only 0.04) or metal materials with an even lower friction coefficient.

[0027] In this embodiment, the rolling resistance value refers to the resistance generated by factors such as tire deformation and friction when the tire contacts the ground and rolls.

[0028] In this embodiment, the tire pattern area refers to different pattern areas on the tire tread.

[0029] The working principle and beneficial effects of the above technical solution are: by dividing the tire tread into zones and using rolling resistance testing equipment to measure the rolling resistance value of each zone separately, and combining the pattern characteristics to evaluate the resistance of the tire, it is possible to accurately analyze tire performance, optimize the design, improve fuel efficiency and performance, and have significant energy-saving and environmental benefits.

[0030] Example 2: Based on the above embodiment 1, a target tire is selected as a test sample, and basic parameters of the target tire are obtained, including: Clarify the test objectives and select the tire type based on the test objectives; Select representative target tires among tire types as test samples; The basic parameters of the target tire are obtained according to the factory information of the target tire.

[0031] In this embodiment, the test target refers to the specific purpose to be achieved and the indicators to be evaluated when performing tire performance testing.

[0032] In this embodiment, tire types are classified according to the design, application, structure and performance of the tire, for example: off-road tire, traction tire, road tire, etc.

[0033] In this embodiment, representativeness means that the selected tires can represent most tire characteristics of a specific type, ensuring that the test results have wide applicability.

[0034] In this embodiment, the factory information refers to detailed technical and specification information about the tire provided by the manufacturer during the production process of the tire.

[0035] The working principle and beneficial effects of this technical solution are as follows: by clarifying the test objectives, selecting representative target tires, and obtaining their basic parameters, accurate data is provided for subsequent testing. This process ensures the scientific and accurate test results, optimizes tire design, and improves performance and fuel efficiency.

[0036] Example 3: Based on the above embodiment 1, before the tread of the target tire is subjected to longitudinal partitioning, the following steps are included: Based on the image acquisition device, an original image of the tread of the target tire is obtained; Performing grayscale processing on the original tread image to obtain a first image, and mapping the first image to a standard coordinate system; Perform Gaussian filtering on the first image and obtain the gradient of any pixel: ;in, Represents the gradient magnitude of the pixel point (x, y), Represents the grayscale value of the pixel (x, y), Indicates the gradient of the pixel point (x, y) in the x direction, represents the gradient of the pixel point (x, y) in the y direction, and T( ) represents the direction conversion function; Based on the gradient of any pixel point in the first image, a convolution operation is performed in combination with a preset convolution kernel to obtain a smooth pixel point, and a second image is constructed based on all the smooth pixel points; Scanning any adjacent pixel group of a preset size in the second image using a gradient factor, and if the gradient of any pixel point in the adjacent pixel group is not a local maximum, suppressing the gradient of the pixel point to 0 to obtain an extreme value pixel point; The pattern image of the target tire is constructed based on all extreme pixel points.

[0037] In this embodiment, the image acquisition device is a device used to capture the image of the target tire, such as a digital camera, an industrial camera, or a laser scanner.

[0038] In this embodiment, the original tread image is original image data of the tire surface acquired by an image acquisition device.

[0039] In this embodiment, grayscale processing is a basic operation in image processing, which refers to the process of converting a color image into a grayscale image.

[0040] In this embodiment, the first image refers to the original image of the tread of the target tire after grayscale processing.

[0041] In this embodiment, the standard coordinate system refers to a mathematical reference frame used to determine the position of each pixel in the image.

[0042] In this embodiment, Gaussian filtering is a technique commonly used in image processing to remove noise and blur an image. The Gaussian filter convolves the image with a Gaussian function to smooth the image and reduce noise.

[0043] In this embodiment, the gradient refers to the rate at which the grayscale value of an image pixel changes with spatial position.

[0044] In this embodiment, the direction conversion function converts the gradient information of a pixel point from one coordinate system to another coordinate system.

[0045] In this embodiment, the preset convolution kernel refers to a predefined matrix used in a convolution operation, which is used to process pixels in an image.

[0046] In this embodiment, smoothed pixels refer to pixels whose noise in the image is reduced through a filtering convolution operation.

[0047] In this embodiment, the second image is an image generated based on the original first image and the convolution kernel operation after Gaussian filtering and smoothing.

[0048] In this embodiment, the gradient factor represents the intensity coefficient of the grayscale change at a certain point in the image.

[0049] In this embodiment, the preset size refers to a fixed size of the used area in image processing.

[0050] In this embodiment, the adjacent pixel group refers to a local area in the image processing process, which is composed of a number of pixel points around a specific pixel point in the image.

[0051] In this embodiment, the local maximum refers to a pixel point whose grayscale value or gradient value is the largest relative to the grayscale values of other surrounding pixels within a neighborhood of the pixel point.

[0052] In this embodiment, the extreme pixel point refers to a pixel point that satisfies local maximum suppression after being scanned by the gradient factor.

[0053] In this embodiment, the pattern image represents the significant texture features in the tire tread.

[0054] The working principle and beneficial effects of the above technical solution are: extracting the pattern image of the target tire through image processing technology, and using grayscale processing, Gaussian filtering, gradient calculation and convolution operations to accurately identify and extract tread pattern features, thereby improving the accuracy of tire pattern analysis and helping to optimize tire design and performance evaluation.

[0055] Example 4: Based on the above embodiment 1, the tread of the target tire is partitioned longitudinally to obtain five tread areas, and each tread area is numbered, including: The pattern image is divided into a left shoulder, a right shoulder, and a center pattern according to the basic parameters of the target tire, and the left shoulder and the right shoulder are regarded as the first area and the second area respectively; Conduct symmetry analysis on the central pattern, including central symmetry and axial symmetry; Based on the distribution and symmetry of the central pattern, the central pattern is split from the center point of the image to both sides; According to the preset center width and the preset two side widths, the center pattern is symmetrically divided into a left image, a center image, and a right image, which are regarded as the third area, the fourth area, and the fifth area respectively.

[0056] In this embodiment, the shoulder refers to the area on both sides of the tire tread, which is the transition area connecting the central part of the tire and the sidewall of the tire.

[0057] In this embodiment, the center pattern is the pattern area in the middle portion of the tire tread, usually located in the center of the tire.

[0058] In this embodiment, the first area is a left portion of the tire shoulder.

[0059] In this embodiment, the second region is a right portion of the tire shoulder.

[0060] In this embodiment, the symmetry analysis includes central symmetry and axial symmetry. Central symmetry refers to the symmetry of an image around a certain central point or the symmetry of an image around a certain central axis.

[0061] In this embodiment, the preset center width refers to the preset width of the “center pattern” area in the tire pattern image.

[0062] In this embodiment, the preset widths on both sides refer to the widths of the areas on both sides surrounding the central pattern in the tire pattern image, and the widths on both sides are equal.

[0063] In this embodiment, the third area is located on the left side of the image, and is a portion segmented from the center point of the tire pattern image to the left.

[0064] In this embodiment, the fourth area is located at the center of the image.

[0065] In this embodiment, the fifth area is located on the right side of the image, and is a portion segmented to the right from the center point of the tire pattern image.

[0066] The working principle and beneficial effects of the above technical solution are: by performing regional division and symmetry analysis on the target tire pattern image, the center pattern is accurately identified and segmented into left, center and right areas, which helps to analyze the tire pattern characteristics more carefully and provide support for tire performance evaluation.

[0067] Example 5: Based on the above embodiment 1, the rolling resistance values of the left, right, shoulder, and middle tire tread areas were measured in groups using the rolling resistance test equipment and the shielding material, including: Select materials that meet the preset performance standards as shielding materials; Cutting the blocking material based on a preset center width, a preset single-side width, and a shoulder width to obtain a first material; Using the first material to block the first and third areas of the target tire to obtain a measurable right area of the tire, and performing a rolling resistance test on the measurable right area of the tire to obtain a first rolling resistance value; The first material is used to block the second area and the fifth area of the target tire to obtain a measurable left area of the tire. A rolling resistance test is performed on the measurable left area of the tire to obtain a second rolling resistance value.

[0068] In this embodiment, the shoulder width refers to the width of an area related to the outer shoulder of the tire in the tire tread image.

[0069] In this embodiment, the first material refers to a material obtained by cutting the shielding material according to a preset center width, a single-side width, and a shoulder width.

[0070] In this embodiment, the tire can measure the right side area such as Figure 4 The unshaded portion is shown.

[0071] In this embodiment, the first rolling resistance value refers to the result of a rolling resistance test on the measurable right side of the tire.

[0072] In this embodiment, the tire can measure the left side area such as Figure 5 The unshaded portion is shown.

[0073] In this embodiment, the second rolling resistance value refers to the result of a rolling resistance test on the measurable left area of the tire.

[0074] The working principle and beneficial effects of the above technical solution are as follows: by cutting out the masking material and blocking different areas of the tire, rolling resistance tests are performed to obtain rolling resistance values for the left and right areas of the tire. This method helps to evaluate the impact of different areas on tire rolling resistance performance and provides a basis for optimizing tire design.

[0075] Example 6: Based on the above embodiment 1, the rolling resistance test equipment and the shielding material are used to measure the rolling resistance values of the left, right, shoulder, and middle tire tread areas in groups, and further include: Cutting the blocking material according to the preset center width, the preset total value of the width on both sides, and the shoulder width to obtain a second material; Using the second material to block the first, third, fourth, and fifth areas of the target tire to obtain a measurable right shoulder area of the tire, and performing a rolling resistance test on the measurable right shoulder area of the tire to obtain a third rolling resistance value; Using the second material to block the second, third, fourth, and fifth areas of the target tire to obtain a measurable left shoulder area of the tire, and performing a rolling resistance test on the measurable left shoulder area of the tire to obtain a fourth rolling resistance value; Cutting the blocking material according to the preset center width, the preset two side widths and the shoulder width to obtain a third material; The first area, the second area, the third area, and the fifth area of the target tire are blocked with the third material to obtain a measurable center area of the tire. A rolling resistance test is performed on the measurable center area of the tire to obtain a fifth rolling resistance value.

[0076] In this embodiment, the second material is obtained by cutting the shielding material according to the preset center width, the preset total value of the widths on both sides, and the shoulder width.

[0077] In this embodiment, the tire can measure the right shoulder area as follows Figure 6 Unshaded area shown.

[0078] In this embodiment, the tire can detect the left shoulder area. Figure 6 symmetrical sides.

[0079] In this embodiment, the third rolling resistance value is a value obtained by performing a rolling resistance test on a measurable right shoulder area of the tire.

[0080] In this embodiment, the fourth rolling resistance value is a value obtained by performing a rolling resistance test on a measurable left shoulder area of the tire.

[0081] In this embodiment, the third material is obtained by cutting the shielding material according to the preset center width, the preset total value of the widths on both sides, and the shoulder width.

[0082] In this embodiment, the tire measurable center area is as follows: Figure 7 Unshaded area shown.

[0083] In this embodiment, the fifth rolling resistance value is a rolling resistance test value obtained at a measurable central area of the tire.

[0084] The working principle and beneficial effects of the above technical solution are as follows: by cutting different masking materials, rolling resistance tests are conducted on different areas of the tire, and rolling resistance values are obtained for different areas. This method helps to comprehensively evaluate the rolling resistance performance of the tire in different areas, providing data support for optimizing tire design and improving performance.

[0085] Example 7: Based on the above embodiment 6, evaluating the resistance of the target tire according to the rolling resistance value in combination with the tire tread pattern includes: According to the five rolling resistance values of the target tire and the tire pattern, the resistance of the target tire is calculated as: ;in, represents the resistance of the target tire, represents the preset weight coefficient of the i-th rolling resistance value, Indicates the standard tire rolling resistance coefficient, Indicates the influence factor of tire material on rolling resistance, Indicates the pattern ratio of the rolling resistance area corresponding to the i-th rolling resistance value, represents the rated load gravity of the target tire, f( ) represents the load function, Indicates the rolling resistance coefficient corresponding to the speed v in the rolling resistance test equipment, represents the conversion coefficient related to the speed ratio, Indicates the specified standard speed of the target tire; If the target tire resistance is greater than the preset resistance, it is determined that the target tire pattern is unqualified; otherwise, it is determined that the target tire pattern is qualified.

[0086] In this embodiment, resistance refers to the rolling resistance generated by the target tire under specific conditions (speed, load, tire pattern).

[0087] In this embodiment, the standard tire rolling resistance coefficient refers to a rolling resistance coefficient generated by an idealized tire under specific conditions.

[0088] In this embodiment, the impact factor refers to the contribution of the pattern design to the rolling resistance when calculating the rolling resistance of the target tire.

[0089] In this embodiment, the load function is a function used in tire testing and evaluation to describe the effect of load on rolling resistance.

[0090] In this embodiment, the rolling resistance area pattern ratio refers to the ratio of the pattern area directly related to rolling resistance in the tire surface.

[0091] In this embodiment, the preset resistance refers to the maximum allowable rolling resistance that the target tire should achieve according to certain standards or requirements when designing and evaluating the tire.

[0092] The working principle and beneficial effects of the above technical solution are as follows: By combining five rolling resistance values, pattern ratio, and load factors, the comprehensive resistance of the target tire is calculated. If the resistance exceeds the preset value, the tire pattern is deemed unqualified, helping to ensure that tire performance meets regulations and improving the scientific and accurate design of tires.

[0093] Example 8: like Figure 2 As shown, an embodiment of the present invention provides a device for testing rolling resistance in different regions, comprising: Basic parameter module: selects a target tire as a test sample and obtains the basic parameters of the target tire; Partitioning module: partitions the tread of the target tire longitudinally to obtain five tread areas, and numbers each tread area; Measurement module: Based on the rolling resistance test equipment and shielding materials, the rolling resistance values of the left, right, shoulder, and middle tire tread areas are measured in groups; Evaluation module: evaluates the resistance of the target tire according to the rolling resistance value.

[0094] The working principle and beneficial effects of the above technical solution are: by dividing the tire tread into zones and using rolling resistance testing equipment to measure the rolling resistance value of each zone separately, and combining the pattern characteristics to evaluate the resistance of the tire, it is possible to accurately analyze tire performance, optimize the design, improve fuel efficiency and performance, and have significant energy-saving and environmental benefits.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for testing rolling resistance in different regions, characterized in that: include: Step 1: Select a target tire as a test sample and obtain basic parameters of the target tire; Step 2: Partition the tread of the target tire longitudinally to obtain five tread areas, and number each tread area; Step 3: Using the rolling resistance test equipment and the shielding material, measure the rolling resistance values of the left, right, shoulder, and center tire tread areas in groups. Step 4: Evaluate the resistance of the target tire based on the rolling resistance value and the tire pattern.

2. The method for testing rolling resistance by region according to claim 1, characterized in that: A target tire is selected as a test sample, and basic parameters of the target tire are obtained, including: Clarify the test objectives and select the tire type based on the test objectives; Select representative target tires among tire types as test samples; The basic parameters of the target tire are obtained according to the factory information of the target tire.

3. The method for testing rolling resistance by region according to claim 1, characterized in that: Before the tread of the target tire is longitudinally partitioned, the following steps are included: Based on the image acquisition device, an original image of the tread of the target tire is obtained; Performing grayscale processing on the original tread image to obtain a first image, and mapping the first image to a standard coordinate system; Perform Gaussian filtering on the first image and obtain the gradient of any pixel: ;in, Represents the gradient magnitude of the pixel point (x, y), Represents the grayscale value of the pixel (x, y), Indicates the gradient of the pixel point (x, y) in the x direction, represents the gradient of the pixel point (x, y) in the y direction, and T( ) represents the direction conversion function; Based on the gradient of any pixel point in the first image, a convolution operation is performed in combination with a preset convolution kernel to obtain a smooth pixel point, and a second image is constructed based on all the smooth pixel points; Scanning any adjacent pixel group of a preset size in the second image using a gradient factor, and if the gradient of any pixel point in the adjacent pixel group is not a local maximum, suppressing the gradient of the corresponding pixel point to 0 to obtain an extreme value pixel point; The pattern image of the target tire is constructed based on all extreme pixel points.

4. The method for testing rolling resistance by region according to claim 1, characterized in that: The tread of the target tire is partitioned longitudinally to obtain five tread areas, and each tread area is numbered, including: The pattern image is divided into a left shoulder, a right shoulder, and a center pattern according to the basic parameters of the target tire, and the left shoulder and the right shoulder are regarded as the first area and the second area respectively; Conduct symmetry analysis on the central pattern, including central symmetry and axial symmetry; Based on the distribution and symmetry of the central pattern, the central pattern is split from the center point of the image to both sides; According to the preset center width and the preset two side widths, the center pattern is symmetrically divided into a left image, a center image, and a right image, which are regarded as the third area, the fourth area, and the fifth area respectively.

5. The method for testing rolling resistance by region according to claim 1, characterized in that: Based on the rolling resistance test equipment and shielding materials, the rolling resistance values of different tire tread areas, including the left side, right side, shoulder, and middle, are measured separately. Select materials that meet the preset performance standards as shielding materials; Cutting the blocking material based on a preset center width, a preset single-side width, and a shoulder width to obtain a first material; Using the first material to block the first and third areas of the target tire to obtain a measurable right area of the tire, and performing a rolling resistance test on the measurable right area of the tire to obtain a first rolling resistance value; The first material is used to block the second area and the fifth area of the target tire to obtain a measurable left area of the tire. A rolling resistance test is performed on the measurable left area of the tire to obtain a second rolling resistance value.

6. The method for testing rolling resistance by region according to claim 1, characterized in that: Based on the rolling resistance test equipment and shielding materials, the rolling resistance values of different tire tread areas, including the left side, right side, shoulder, and middle, are measured separately. Cutting the blocking material according to the preset center width, the preset total value of the width on both sides, and the shoulder width to obtain a second material; Using the second material to block the first, third, fourth, and fifth areas of the target tire to obtain a measurable right shoulder area of the tire, and performing a rolling resistance test on the measurable right shoulder area of the tire to obtain a third rolling resistance value; Using the second material to block the second, third, fourth, and fifth areas of the target tire to obtain a measurable left shoulder area of the tire, and performing a rolling resistance test on the measurable left shoulder area of the tire to obtain a fourth rolling resistance value; Cutting the blocking material according to the preset center width, the preset two side widths and the shoulder width to obtain a third material; The first area, the second area, the third area, and the fifth area of the target tire are blocked with the third material to obtain a measurable center area of the tire. A rolling resistance test is performed on the measurable center area of the tire to obtain a fifth rolling resistance value.

7. The method for testing rolling resistance by region according to claim 6, characterized in that: Evaluating the resistance of the target tire according to the rolling resistance value and the tire tread pattern, including: According to the five rolling resistance values of the target tire and the tire pattern, the resistance of the target tire is calculated as: ;in, represents the resistance of the target tire, represents the preset weight coefficient of the i-th rolling resistance value, Indicates the standard tire rolling resistance coefficient, Indicates the influence factor of tire material on rolling resistance, Indicates the pattern ratio of the rolling resistance area corresponding to the i-th rolling resistance value, represents the rated load gravity of the target tire, f( ) represents the load function, Indicates the rolling resistance coefficient corresponding to the speed v in the rolling resistance test equipment, represents the conversion coefficient related to the speed ratio, Indicates the specified standard speed of the target tire; If the target tire resistance is greater than the preset resistance, it is determined that the target tire pattern is unqualified; otherwise, it is determined that the target tire pattern is qualified.

8. A device for testing rolling resistance in different areas, characterized in that: include: Basic parameter module: selects a target tire as a test sample and obtains the basic parameters of the target tire; Partitioning module: partitions the tread of the target tire longitudinally to obtain five tread areas, and numbers each tread area; Measurement module: Based on the rolling resistance test equipment and shielding materials, the rolling resistance values of the left, right, shoulder, and middle tire tread areas are measured in groups; Evaluation module: evaluates the resistance of the target tire according to the rolling resistance value.

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