Tire scratch checking system, method and device

Abstract

The invention discloses a tire scratch checking system, method and device, and relates to the technical field of tire scratch checking. According to the technical scheme, when the vehicle is in the running state, the laser beams are emitted at intervals along the horizontal center line of the tire to implement laser ranging through the ranging terminal installed on the outer side of the tire, so that the ranging data measured by each laser beam are obtained; the spacing distance between the tire and the wheel cover is determined according to the distance measurement data measured by the spacing laser beam, the spacing distance represents the size of the space between the tire and the wheel cover when the vehicle is in a driving state, and the horizontal deformation of the tire when the vehicle is in the driving state can be accurately verified according to the spacing distance to judge whether the tire and the wheel cover are scratched or not. According to the technical scheme, the spacing distance between the tire and the wheel cover in the vehicle driving state can be measured in real time, whether the tire rubs the wheel cover or not in various driving states of the vehicle is accurately verified, and then the tire and wheel cover rubbing verification accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tire scratch detection, and in particular to a tire scratch detection system, method and device. Background Art

[0002] Under certain extreme working conditions, cars may have scratches on their tires and wheel covers. To avoid scratches, theoretical clearance values ​​are specified during design and development. Before cars roll off the production line, actual vehicles are required to verify the difference between the clearance between the tire and the wheel cover and the theoretical value, and to check the interference between the tire and the wheel cover. Currently, OEMs mainly rely on driving vehicles through specific road conditions and observing whether there are scratches on the wheel cover to determine interference. Although this method can determine whether the tire and wheel cover are dynamically scratched, it cannot verify the deviation between the dynamic clearance value and the theoretical requirement value, resulting in an inability to accurately verify whether the tire is at risk of scratching the wheel cover. Summary of the invention

[0003] In order to solve the technical problem of how to accurately check whether a tire has scratched a wheel cover, the present invention provides a tire scratch checking system, method and device, which can check whether a tire has scratched a wheel cover during driving, thereby improving the accuracy of tire and wheel cover scratch checking.

[0004] The embodiment of the present invention provides the following solution:

[0005] In a first aspect, an embodiment of the present invention provides a tire scratch detection system, the system comprising:

[0006] The distance measuring terminal is installed on the outer side of the tire so that the distance measuring terminal and the wheel cover on the outer periphery of the tire remain relatively still when the vehicle is in a driving state; the distance measuring terminal is used to transmit laser beams at intervals along the horizontal center line of the tire to perform laser distance measurement when the vehicle is in a driving state, so as to obtain the distance measurement data measured by each laser beam;

[0007] The processing terminal is connected to the distance measuring terminal. The processing terminal is used to determine the spacing distance between the tire and the wheel cover according to the distance measuring data measured by all laser beams, and to verify whether the horizontal deformation of the tire under driving state will cause the tire to scratch the wheel cover.

[0008] In an optional embodiment, the system further includes:

[0009] The acceleration sensor is installed on the component that jumps vertically synchronously with the tire when the vehicle is in motion. The acceleration sensor is used to measure the acceleration of the tire in the vertical direction and output it to the outside;

[0010] The adjusting component is connected to the acceleration sensor, the first fixed end of the adjusting component is connected to the body of the vehicle, and the second fixed end of the adjusting component is connected to the ranging terminal; the adjusting component is used to receive the acceleration of the tire in the vertical direction, and adjust the vertical position of the ranging terminal according to the acceleration, so that the laser beam emitted by the ranging terminal follows the horizontal center line.

[0011] In an optional embodiment, the adjustment component includes:

[0012] A fixed arm, one end of which is configured as a first fixed end and connected to a body of the vehicle;

[0013] A telescopic arm, one end of the telescopic arm is connected to the other end of the fixed arm, and the other end of the telescopic arm is connected to the ranging terminal;

[0014] The controller is connected to the telescopic arm, and is used to determine the telescopic length of the telescopic arm according to the acceleration, so as to adjust the vertical position of the ranging terminal so that the laser beam emitted by the ranging terminal follows the horizontal center line.

[0015] In a second aspect, an embodiment of the present invention further provides a tire scratch detection method, the method comprising:

[0016] When the vehicle is in a driving state, the distance measuring terminal is controlled to emit laser beams at intervals along the horizontal center line of the tire to perform laser distance measurement, so as to obtain distance measurement data measured by each laser beam, wherein the distance measuring terminal is installed on the outer side of the tire, and when the vehicle is in a driving state, the distance measuring terminal and the wheel cover on the outer periphery of the tire remain relatively stationary;

[0017] Based on the distance measurement data measured by all laser beams, the distance between the tire and the wheel cover is determined, and the horizontal deformation of the tire during driving is verified to see whether it will cause scratches between the tire and the wheel cover.

[0018] In an optional embodiment, before controlling the ranging terminal to emit laser beams at intervals along the horizontal center line of the tire to perform laser ranging, the method further includes:

[0019] The laser beam emitted by the distance measuring terminal and close to the wheel cover is configured as a reference beam;

[0020] Adjust the position of the reference beam on the horizontal center line so that the reference beam measures the distance to the target position on the wheel cover closest to the tire;

[0021] The laser beams other than the reference beam are arranged at intervals along the horizontal center line until the arranged laser beams are emitted to the tire in the target state, wherein the target state is a state where the tire is not turned and is not deformed in the horizontal direction.

[0022] In an optional embodiment, the distance between the tire and the wheel cover is determined based on the distance measurement data measured by all laser beams, and the horizontal deformation of the tire in the driving state is verified to see whether it will cause the tire to scratch the wheel cover, including:

[0023] According to the distance measurement data measured by each laser beam, the maximum spacing distance and the minimum spacing distance between the tire and the wheel cover when the vehicle is in a driving state are obtained;

[0024] According to the maximum spacing distance, the minimum spacing distance and the designed target spacing, the deviation range between the tire and the wheel cover is obtained;

[0025] When the deviation interval is within the preset safety interval, it is determined that there is no risk of scratching the tire and the wheel cover;

[0026] When the deviation interval is not within the preset safety interval, it is determined that there is a risk of scratching the tire and the wheel cover.

[0027] In an optional embodiment, according to the distance measurement data measured by each laser beam, the maximum spacing distance and the minimum spacing distance between the tire and the wheel cover when the vehicle is in a driving state are obtained, including:

[0028] In each laser ranging cycle, the ranging data measured by each laser beam is arranged in sequence from the wheel cover to the tire direction to obtain the data arrangement result of each laser ranging cycle;

[0029] Determine the interval between the tire and the wheel cover in all laser ranging cycles according to the data arrangement results and the corresponding ranging data;

[0030] The maximum value and the minimum value of all interval distances are determined as the maximum interval distance and the minimum interval distance, respectively.

[0031] In an optional embodiment, determining the interval distance between the tire and the wheel cover in all laser ranging cycles according to the data arrangement result and the corresponding ranging data includes:

[0032] Calculate the difference between two adjacent distance measurement data in the data arrangement result, and when the difference result is less than a preset difference value, determine the laser beam corresponding to the tire as the termination laser beam;

[0033] The distance between the reference laser beam and the termination laser beam on the side close to the wheel cover is determined as the spacing distance.

[0034] In an optional embodiment, before obtaining the maximum spacing distance and the minimum spacing distance between the tire and the wheel cover when the vehicle is in a driving state according to the distance measurement data measured by each laser beam, the method further includes:

[0035] The distance measurement data measured by each laser beam in each laser distance measurement cycle is cleaned to remove abnormal data caused by splashing foreign matter in the distance measurement data.

[0036] In a third aspect, an embodiment of the present invention further provides a tire scratch detection device, the device comprising:

[0037] The obtaining module is used to control the distance measuring terminal to emit laser beams at intervals along the horizontal center line of the tire to perform laser distance measurement when the vehicle is in a driving state, so as to obtain the distance measurement data measured by each laser beam, wherein the distance measuring terminal is installed on the outer side of the tire, and the distance measuring terminal and the wheel cover on the outer periphery of the tire remain relatively stationary when the vehicle is in a driving state;

[0038] The processing module is used to determine the distance between the tire and the wheel cover based on the distance measurement data measured by all laser beams, and to verify whether the horizontal deformation of the tire during driving will cause the tire to scratch the wheel cover.

[0039] Compared with the prior art, the tire scratch detection system, method and device of the present invention have the following advantages:

[0040] The technical solution of the present invention uses a distance measurement terminal installed on the outside of the tire to perform laser distance measurement by emitting laser beams at intervals along the horizontal center line of the tire when the vehicle is in a driving state, so as to obtain the distance measurement data measured by each laser beam; since the distance measurement terminal and the wheel cover on the outer periphery of the tire remain relatively stationary, the distance between the tire and the wheel cover can be determined by the distance measurement data measured by the interval laser beams. The distance between the tire and the wheel cover represents the size of the space between the tire and the wheel cover when the vehicle is in a driving state. The distance between the tire can be used to accurately verify whether the horizontal deformation of the tire of the vehicle in a driving state will cause the tire to scratch the wheel cover. The technical solution can measure the distance between the tire and the wheel cover in real time when the vehicle is in a driving state, accurately verify whether the tire of the vehicle scratches the wheel cover in various driving states, and thus improve the accuracy of the tire and wheel cover scratch verification. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A structural diagram of a tire scratch detection system provided by an embodiment of the present invention;

[0043] Figure 2 A main schematic diagram of a ranging terminal implementing ranging provided by an embodiment of the present invention;

[0044] Figure 3 A bottom-up schematic diagram of a ranging terminal implementing ranging according to an embodiment of the present invention;

[0045] Figure 4 A flowchart of a tire scratch detection method provided by an embodiment of the present invention;

[0046] Figure 5 A schematic diagram of the principle of implementing ranging by a ranging terminal provided in an embodiment of the present invention;

[0047] Figure 6 A schematic structural diagram of a tire scratch detection device provided in an embodiment of the present invention.

[0048] Description of reference numerals: 1-distance measuring terminal, 2-processing terminal, 3-tire, 4-wheel cover, 5-adjustment component;

[0049] 51-fixed arm, 52-telescopic arm. DETAILED DESCRIPTION

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the scope of protection of the embodiments of the present invention.

[0051] Regarding the problem of scratches between the tires and wheel covers of vehicles, sensors are often used to detect whether there is any scratch between the two. For example, the Chinese invention patent with publication number CN 112629887 A can measure the distance between the fender and the wheel center of the tire through a distance sensor, and can measure the rotation speed of the tire through a speed sensor. When the tire scratches the fender, if the rotation speed of the tire exceeds the specified speed, it means that there is a problem with the driver's operation; if the rotation speed of the tire does not exceed the specified speed, it means that there is a design problem with the vehicle itself. However, this solution cannot implement whether there is any scratch in the horizontal center line direction of the tire during the driving process of the vehicle. In actual applications, when the vehicle is in a driving state, the road surface excitation will cause the horizontal center line position of the tire to deform, and then scratch the wheel cover. The following embodiments of the present invention will specifically explain how to solve the accurate verification of scratches.

[0052] See also Figure 1 , Figure 1 A structural schematic diagram of a tire scratch detection system provided in an embodiment of the present invention, the system includes a distance measurement terminal 1 and a processing terminal 2.

[0053] The ranging terminal 1 is installed on the outside of the tire so that the ranging terminal and the wheel cover on the outer periphery of the tire remain relatively still when the vehicle is in a driving state. The ranging terminal can be installed on the vehicle via a fixed frame, for example, one end of the fixed frame is fixedly installed on the door, and the ranging terminal is installed on the other end. The ranging terminal is used to transmit laser beams at intervals along the horizontal center line of the tire to implement laser ranging when the vehicle is in a driving state, so as to obtain the ranging data measured by each laser beam. The ranging terminal 1 can be a terminal integrating multiple laser ranging sensors, each laser ranging sensor emits a corresponding laser beam, and multiple laser sensors are spaced apart on the horizontal center line. The spacing distance can be set based on actual needs, such as 0.5 mm, or it can be set to other values. The ranging data includes the distance between the ranging terminal and the wheel cover, and the distance between the ranging terminal and the tire.

[0054] The processing terminal 2 can be a computer device or a data processing server that can perform data calculations. The processing terminal 2 is connected to the distance measuring terminal 1, and the processing terminal is used to determine the interval distance between the tire and the wheel cover based on the distance measuring data measured by all laser beams, and to verify whether the horizontal deformation of the tire under driving conditions will cause the tire to scratch the wheel cover. It should be noted that all laser beams cover the space between the tire and the wheel cover on the horizontal center line, and most of the laser beams are in this space. When the laser beam is irradiated to the tire, the distance value represented by the measured distance measuring data will become smaller. Based on this, the number of laser beams that are not blocked by the tire among all laser beams can be obtained, and the interval distance is obtained based on the number of laser beams and the distance between the laser beams. When the interval distance is small, it means that there is a risk of scratching.

[0055] It can be understood that, since the laser beam in the embodiment of the present invention measures the distance along the axial direction of the tire, even when the vehicle is in certain special working conditions, such as the steering limit, the tire may have exceeded the coverage area of ​​the entire wheel cover, and the spatial distance between the tire and the wheel cover can still be measured. It is impossible to accurately measure this spatial distance based on a traditional ultrasonic rangefinder. In addition, the calibration system of the embodiment of the present invention also has the advantages of simple structure and easy to carry, which is convenient for technicians to carry when going out for testing, and its portability is good.

[0056] In actual applications, when the vehicle is in motion, the wheels bounce in the vertical direction. Under this condition, the distance measurement terminal cannot always be located on the horizontal center line of the tire, resulting in the problem of insufficient accuracy of the distance measurement data obtained. Based on this, in a specific implementation, the verification system also includes an acceleration sensor and an adjustment component.

[0057] The acceleration sensor is installed on a component that jumps vertically synchronously with the tire when the vehicle is in motion. For example, a packaging shell is set up, and the acceleration sensor is placed in the packaging shell. The packaging shell is fixed to the center of the wheel where the tire is located by gluing, bolting or snap connection. The acceleration sensor is used to measure the acceleration of the tire in the vertical direction and output it to the outside; the output method can be wireless transmission or wired transmission, which is not specifically limited here.

[0058] The adjustment component and the acceleration sensor can transmit data by wired communication. The first fixed end of the adjustment component is connected to the body of the vehicle and can be fixedly installed on the door. The second fixed end of the adjustment component is connected to the distance measuring terminal, and the connection and fastening of the second fixed end and the distance measuring terminal can be realized by fasteners or other clamping structures. The adjustment component is used to receive the acceleration of the tire in the vertical direction, and adjust the vertical position of the distance measuring terminal according to the acceleration, so that the laser beam emitted by the distance measuring terminal follows the horizontal center line. The adjustment component can be a hydraulic telescopic mechanism or an electric telescopic mechanism. During the driving process of the vehicle, the acceleration sensor obtains the acceleration of the wheel in the vertical direction in real time and outputs it to the adjustment component. The adjustment component adjusts the position of the measurement terminal based on the acceleration sensor, so that the laser beam emitted by the measurement terminal irradiates the horizontal center line of the tire and covers the position of the wheel cover. When implementing the scratch test, the position to be tested can be the side of the tire close to the rear of the vehicle; of course, it can also include the side close to the tire close to the front of the vehicle.

[0059] For example, see Figure 2 and Figure 3 , Figure 2 and Figure 3 They are respectively the main view schematic diagram and the bottom view schematic diagram of the ranging terminal implementing ranging. The adjustment component 5 includes a fixed arm 51, a telescopic arm 52 and a controller. One end of the fixed arm is configured as a first fixed end, which is connected to the body of the vehicle. The fixed arm can be configured as a magnetic structure, which is directly adsorbed on the door of the vehicle. One end of the telescopic arm is connected to the other end of the fixed arm, and the other end of the telescopic arm is connected to the ranging terminal. The telescopic arm can be composed of an oil cylinder, an air cylinder or an electric telescope, and can be telescopically moved in the vertical direction. The controller can be a control board composed of a single-chip microcomputer, or it can be other terminal devices that can implement control. The controller can be connected to the telescopic arm through a cable. The controller is used to determine the telescopic length of the telescopic arm according to the acceleration, so as to adjust the vertical position of the ranging terminal so that the laser beam emitted by the ranging terminal follows the horizontal center line.

[0060] It should be noted that in order to ensure the stability of the ranging terminal, the adjustment component can also be set as a bracket structure to support the ranging terminal in the horizontal direction, maintain the freedom of the ranging terminal in the vertical direction, and adjust the position of the ranging terminal in the vertical direction through the telescopic arm, so that during the driving of the vehicle, the tires and wheel covers on the horizontal center line are always measured to obtain accurate ranging data.

[0061] Based on the same technical concept as the verification system, the embodiment of the present invention also provides a tire scratch verification method, please refer to Figure 4 , Figure 4 The following is a flow chart of a verification method, which can be applied to a processing terminal of a verification system to implement a tire and wheel cover scratch verification. The verification method includes:

[0062] S11. When the vehicle is in motion, the distance measuring terminal is controlled to emit laser beams at intervals along the horizontal center line of the tire to perform laser distance measurement to obtain distance measurement data measured by each laser beam, wherein the distance measuring terminal is installed on the outer side of the tire, and the distance measuring terminal and the wheel cover on the outer periphery of the tire remain relatively still when the vehicle is in motion.

[0063] Specifically, during the driving process of the vehicle, the ranging terminal installed on the vehicle will emit laser beams at a preset period on the horizontal center line of the tire. These laser beams are emitted along the horizontal center line of the tire and at a certain interval. This means that the ranging terminal will emit laser beams within a specific distance interval, and each laser beam will measure the distance of the object it irradiates.

[0064] See also Figure 5 , Figure 5 The schematic diagram of the distance measurement terminal implementing the distance measurement principle. The arrows in the figure indicate the irradiation direction of the laser beam. Taking the number of laser beams as an example, the laser beams include x1, x2, x3 and x4. Regardless of whether the vehicle is driving in a straight line or turning, each laser beam can measure the corresponding distance, that is, the distance measurement data. Each distance measurement data represents the measurement result of the corresponding laser beam.

[0065] The purpose of implementing laser ranging is to determine the distance between the tire and the wheel cover on the horizontal center line during vehicle driving. If the laser beam distribution is unreasonable, data collection and processing redundancy will be caused. Based on this, in a specific implementation, before controlling the ranging terminal to emit laser beams at intervals along the horizontal center line of the tire to implement laser ranging, the method also includes:

[0066] The first step is to configure the laser beam emitted by the ranging terminal near the wheel cover as the reference beam. The reference beam is the laser beam closest to the wheel cover among all the laser beams. Figure 5In the figure, the laser beam x1 is located at the outermost side, which is determined as the reference beam. Since the wheel cover does not deform during the driving of the vehicle, the reference beam is used as the starting point for the subsequent interval distance calculation.

[0067] The second step is to adjust the position of the reference beam on the horizontal center line so that the reference beam in the horizontal direction measures the distance to the target position on the wheel cover that is closest to the tire. The target position is the position on the wheel cover that is most likely to be scratched by the tire. The target position can be determined based on the design model of the tire and the wheel cover. For example, based on the simulation of the three-dimensional data model of the tire and the wheel cover, the position that first touches the wheel cover after the tire is deformed in the horizontal direction is the target position.

[0068] The third step is to arrange the laser beams other than the reference beam along the horizontal center line at intervals until the arranged laser beams are emitted to the tire in the target state. The target state is the state where the tire is not turning and has not deformed in the horizontal direction, that is, the state where the tire is located when the vehicle is driving in a straight line, and the direction angle of the wheel is 0°. Please continue to refer to Figure 5 , the laser beams other than the reference beam include laser beams x2, x3 and x4, which are arranged at intervals along the horizontal center line. When laser beam x4 is emitted to the tire, it means that all laser beams have covered the space between the tire and the wheel cover, and the interval distance measurement of the space can be implemented. After the distance measurement is implemented based on the arranged laser beams, the distance measurement data measured by each laser beam can be obtained, and the process goes to step S12.

[0069] S12. Determine the spacing between the tire and the wheel cover based on the distance measurement data measured by all laser beams, and verify whether the horizontal deformation of the tire in the driving state will cause the tire to scratch the wheel cover.

[0070] Specifically, all the distance measurement data can be used to determine the position where the tire blocks the laser beam, and then the interval distance can be calculated. The interval distance can be used to determine the remaining space distance between the tire and the wheel cover after the tire is deformed. A distance curve can be obtained based on all the interval distances. The distance curve is a curve in which the interval distance changes with driving time, or it can be a curve in which the interval distance changes with mileage. The interval curve can be used to determine the change in the interval distance of the vehicle under different driving conditions, and then it can be determined whether there is remaining space between the tire and the wheel cover. When the remaining space is 0 or small, it means that the tire deformation will cause the tire to scratch the wheel cover; conversely, when the remaining space is large, it means that there is no risk of scratching the wheel cover.

[0071] Exemplarily, step S12 includes sub-steps S12-1 to S12-4, which are specifically described as follows:

[0072] S12-1. According to the distance measurement data measured by each laser beam, the maximum spacing distance and the minimum spacing distance between the tire and the wheel cover when the vehicle is in a driving state are obtained. A data processing model can be constructed, and the distance measurement data measured by all laser beams are used as a data set to be processed. The data of the data set is input into the data processing model, and the maximum value and the minimum value in the data set are determined by the data processing model, and they are used as the maximum spacing distance and the minimum spacing distance respectively.

[0073] The principle of laser ranging is to emit a laser to the position to be measured, obtain the path time of the laser path through the reflected light at the position to be measured, and obtain the ranging data by the ratio of the path time to the laser transmission speed. However, during the driving of the vehicle, the splashing of foreign objects due to the rotation of the tires has an adverse effect on the accuracy of data collection. Based on this, after obtaining the ranging data, it is also necessary to clean the ranging data measured by each laser beam in each laser ranging cycle to remove the abnormal data caused by splashing foreign objects in the ranging data.

[0074] Specifically, when implementing data cleaning, corresponding processing can be implemented based on the point-like and discontinuous characteristics of abnormal data. For example, based on the distance measurement data obtained by adjacent laser beams, determine whether there is abnormal data. Specifically, the distance measurement data measured by each laser beam is used to determine the termination laser beam. The termination laser beam is the first laser beam emitted to the tire among all laser beams in the horizontal direction from the wheel cover to the tire. Please continue to refer to Figure 5 , the laser beam x4 in the figure is the terminated laser beam. After x4 is determined to be the terminated laser beam, if the distance measurement data obtained by the subsequent laser beam x5 is also small, or the difference between the two is less than the preset difference threshold, it means that the distance measurement data obtained by the laser beam x4 is correct; otherwise, it means that the normal distance measurement of the laser beam x4 may be blocked by splashing foreign matter, and the corresponding distance measurement data is deleted or corrected to implement data cleaning of the distance measurement data. Through data cleaning processing, the obtained distance measurement data can be made more accurate and the influence of splashing foreign matter on the data can be reduced.

[0075] In practical applications, in order to improve the measurement accuracy of the spacing distance between the tire and the wheel cover, the distance between adjacent laser beams is usually set within 1 mm. The amount of calculation in the data processing process is large, and there may be calculation redundancy based on the above method. Based on this, in a specific implementation, sub-step S12-1 includes:

[0076] The first step is to arrange the distance measurement data measured by each laser beam in each laser distance measurement cycle from the wheel cover to the tire in sequence to obtain the data arrangement result of each laser distance measurement cycle. Figure 5 , laser beams x1 to x4 are arranged sequentially from the wheel cover to the tire direction, and based on this arrangement, the data arrangement result of each laser ranging cycle can be obtained.

[0077] The second step is to determine the distance between the tire and the wheel cover in all laser ranging cycles based on the data arrangement results and the corresponding ranging data. Based on the data arrangement results and the corresponding ranging data, a ranging curve can be generated. The ranging curve is a curve that shows the variation of ranging data with the data arrangement position. Figure 5 Taking the four laser beams as an example, the ranging data corresponding to the laser beam x1 is taken as the origin, and the ranging data corresponding to the laser beam x4 are arranged in sequence. If the interval distance represented by the ranging data corresponding to any of the laser beams x3-x4 is greatly reduced, it means that the laser beam is blocked by the tire, and the distance between the laser beam x1 and the blocked laser beam is the interval distance.

[0078] The specific implementation scheme will be described below. When calculating the interval distance, the difference between two adjacent distance measurement data in the data arrangement result is calculated. When the difference result is less than the preset difference, it means that the difference between the two adjacent distance measurement data is large, and the laser beam close to the tire side is blocked by the tire, resulting in a significant reduction in the measured distance. The corresponding laser beam close to the tire is determined as the termination laser beam; the distance between the reference laser beam close to the wheel cover side and the termination laser beam is determined as the interval distance. The interval distance S can be calculated based on the formula S = a × n, where a is the distance between adjacent laser beams, and n is the number of interval laser beams between the reference laser beam and the termination laser beam. The error of the interval distance S calculated in this way is less than a.

[0079] It should be noted that the correction coefficient of the spacing distance can also be set based on actual needs, and the spacing distance can be further corrected by the correction coefficient to improve the accuracy of the spacing distance calculation. The correction coefficient can be set based on actual needs so that the correction amount of the spacing distance is in direct proportion to the distance between adjacent laser beams.

[0080] In the third step, the maximum and minimum values ​​of all interval distances are determined as the maximum interval distance and the minimum interval distance, respectively. The maximum interval distance and the minimum interval distance can be determined by linear scanning. First, two variables are set to represent the maximum value and the minimum value, respectively, and the initial values ​​are set to the first element of the data set constructed by all interval distances. Then, each element in the data set is checked one by one. For each element, if it is greater than the current maximum value, the maximum value is updated; if it is less than the current minimum value, the minimum value is updated. This process continues until all elements of the data set have been checked. Finally, the maximum and minimum values ​​in the data set are stored in these two variables, and the maximum interval distance and the minimum interval distance can be obtained based on this method.

[0081] S12-2. Obtain the deviation interval between the tire and the wheel cover according to the maximum spacing distance, the minimum spacing distance and the designed target spacing distance. The target spacing distance is the theoretical design distance between the tire and the wheel cover. It is not verified whether the tire deformation in the horizontal direction will cause scratches. The difference between the target spacing distance and the maximum spacing distance is the lower deviation of the deviation interval, and the difference between the target spacing distance and the minimum spacing distance is the upper deviation of the deviation interval.

[0082] S12-3. When the deviation interval is within the preset safety interval, it is determined that there is no risk of scratching the tire and the wheel cover. The safety interval can be determined based on a calibration experiment or can be set based on the experience of a technician, and is not specifically limited here. If the deviation interval is within the preset safety interval, it means that both the upper deviation and the lower deviation are reasonable, and there is no risk of scratching the tire and the wheel cover.

[0083] S12-4. When the deviation interval is not within the preset safety interval, it indicates that the upper deviation or the lower deviation is unreasonable, and it is determined that there is a risk of scratching the tire and the wheel cover.

[0084] Based on the same technical concept as the verification system, the embodiment of the present invention also provides a tire scratch verification device, please refer to Figure 6 , Figure 6 The figure is a schematic diagram of the structure of the verification device. The verification device includes:

[0085] The obtaining module 601 is used to control the distance measuring terminal to emit laser beams at intervals along the horizontal center line of the tire to perform laser distance measurement when the vehicle is in a driving state, so as to obtain the distance measurement data measured by each laser beam, wherein the distance measuring terminal is installed on the outer side of the tire, and the distance measuring terminal and the wheel cover on the outer periphery of the tire remain relatively stationary when the vehicle is in a driving state;

[0086] The processing module 602 is used to determine the distance between the tire and the wheel cover according to the distance measurement data measured by all laser beams, and to verify whether the horizontal deformation of the tire in the driving state will cause the tire to scratch the wheel cover.

[0087] In an optional embodiment, the verification device further includes:

[0088] A configuration module, used for configuring the laser beam emitted by the ranging terminal near the side of the wheel cover as a reference beam;

[0089] An adjustment module, used for adjusting the position of the reference beam at the horizontal center line so that the reference beam measures the distance to the target position on the wheel cover closest to the tire;

[0090] The arrangement module is used to arrange the laser beams other than the reference beam at intervals along the horizontal center line until the arranged laser beams are emitted to the tire in the target state, wherein the target state is a state where the tire is not turned and is not deformed in the horizontal direction.

[0091] In an optional embodiment, the processing module includes:

[0092] A first obtaining submodule is used to obtain the maximum spacing distance and the minimum spacing distance between the tire and the wheel cover when the vehicle is in a driving state according to the distance measurement data measured by each laser beam;

[0093] The second obtaining submodule is used to obtain the deviation interval between the tire and the wheel cover according to the maximum spacing distance, the minimum spacing distance and the designed target spacing;

[0094] The first determination submodule is used to determine that there is no risk of scratching between the tire and the wheel cover when the deviation interval is within a preset safety interval;

[0095] The second determination submodule is used to determine that there is a risk of scratching between the tire and the wheel cover when the deviation interval is not within a preset safety interval.

[0096] In an optional embodiment, the first obtaining submodule includes:

[0097] An obtaining unit, used for sequentially arranging the distance measurement data measured by each laser beam from the wheel cover to the tire direction in each laser distance measurement cycle, so as to obtain the data arrangement result of each laser distance measurement cycle;

[0098] A first determination unit, for determining the interval distance between the tire and the wheel cover in all laser ranging cycles according to the data arrangement result and the corresponding ranging data;

[0099] The second determining unit is used to determine the maximum value and the minimum value of all interval distances as the maximum interval distance and the minimum interval distance respectively.

[0100] In an optional embodiment, the first determining unit includes:

[0101] A first determination subunit is used to calculate the difference between two adjacent distance measurement data in the data arrangement result, and when the difference result is less than a preset difference value, determine the laser beam corresponding to the tire as the termination laser beam;

[0102] The second determining subunit is used to determine the distance between the reference laser beam and the termination laser beam close to the wheel cover side as the spacing distance.

[0103] In an optional embodiment, the processing module further includes:

[0104] The cleaning submodule is used to clean the distance measurement data measured by each laser beam in each laser distance measurement cycle to remove abnormal data caused by splashing foreign matter in the distance measurement data.

[0105] The technical solution provided in the embodiments of the present invention has at least the following technical effects or advantages:

[0106] 1. Through the distance measurement terminal installed on the outside of the tire, when the vehicle is in driving state, laser beams are emitted at intervals along the horizontal center line of the tire to implement laser distance measurement, so as to obtain the distance measurement data measured by each laser beam; since the distance measurement terminal and the wheel cover on the outer periphery of the tire remain relatively still, the distance measurement data measured by the interval laser beams can be used to determine the distance between the tire and the wheel cover. The distance measurement characterizes the size of the space between the tire and the wheel cover when the vehicle is in driving state. The distance measurement can be used to accurately verify whether the horizontal deformation of the tire of the vehicle in driving state will cause the tire to scratch the wheel cover. This technical solution can measure the distance measurement between the tire and the wheel cover in real time when the vehicle is in driving state, accurately verify whether the tire of the vehicle scratches the wheel cover in various driving states, and thus improve the accuracy of the tire and wheel cover scratch verification.

[0107] 2. Real-time detection of the distance between the wheel tire and the wheel cover, and comparison with the designed target distance, on the one hand, can determine whether the actual distance between mass-produced vehicles meets the design requirements; on the other hand, it can be used to guide the development of vehicle models and provide a reference for subsequent development of vehicle models. In addition, the system is easy to set up and carry, which is very convenient.

[0108] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0109] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (modules, systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded computer, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0110] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0111] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0112] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0113] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A tire scratch detection system, characterized in that: The system comprises: The distance measuring terminal is installed on the outer side of the tire so that the distance measuring terminal and the wheel cover on the outer periphery of the tire remain relatively still when the vehicle is in a driving state; the distance measuring terminal is used to emit laser beams at intervals along the horizontal center line of the tire to perform laser distance measurement when the vehicle is in a driving state, so as to obtain distance measurement data measured by each laser beam; A processing terminal is connected to the distance measuring terminal, and is used to determine the spacing distance between the tire and the wheel cover based on the distance measuring data measured by all laser beams, and to verify whether the horizontal deformation of the tire in the driving state will cause the tire to scratch the wheel cover.

2. The tire scratch detection system according to claim 1, characterized in that: The system further comprises: An acceleration sensor is installed on a component that vertically jumps synchronously with the tire when the vehicle is in a driving state, and the acceleration sensor is used to measure the acceleration of the tire in the vertical direction and output it to the outside; An adjusting component is connected to the acceleration sensor, wherein a first fixed end of the adjusting component is connected to a body of the vehicle, and a second fixed end of the adjusting component is connected to the ranging terminal; the adjusting component is used to receive the acceleration of the tire in a vertical direction, and adjust the vertical position of the ranging terminal according to the acceleration, so that the laser beam emitted by the ranging terminal follows the horizontal center line.

3. The tire scratch detection system according to claim 2, characterized in that: The adjustment component comprises: a fixed arm, one end of which is configured as the first fixed end and connected to the body of the vehicle; A telescopic arm, one end of which is connected to the other end of the fixed arm, and the other end of which is connected to the ranging terminal; A controller is connected to the telescopic arm, and the controller is used to determine the telescopic length of the telescopic arm according to the acceleration to adjust the vertical position of the ranging terminal so that the laser beam emitted by the ranging terminal follows the horizontal center line.

4. A tire scratch detection method, characterized in that: The method comprises: When the vehicle is in a driving state, the distance measuring terminal is controlled to emit laser beams at intervals along the horizontal center line of the tire to perform laser distance measurement, so as to obtain distance measurement data measured by each laser beam, wherein the distance measuring terminal is installed on the outer side of the tire, and when the vehicle is in a driving state, the distance measuring terminal and the wheel cover on the outer periphery of the tire remain relatively stationary; The spacing distance between the tire and the wheel cover is determined based on the distance measurement data measured by all laser beams, and it is verified whether the horizontal deformation of the tire in the driving state will cause the tire to scratch the wheel cover.

5. The tire scratch detection method according to claim 4, characterized in that: Before controlling the ranging terminal to emit laser beams at intervals along the horizontal center line of the tire to perform laser ranging, the method further includes: configuring the laser beam emitted by the distance measuring terminal close to the side of the wheel cover as a reference beam; Adjusting the position of the reference beam on the horizontal center line so that the reference beam measures the distance to the target position on the wheel cover closest to the tire; The laser beams other than the reference beam are arranged at intervals along the horizontal center line until the arranged laser beams are emitted to the tire in a target state, wherein the target state is a state in which the tire is not turned and is not deformed in the horizontal direction.

6. The tire scratch detection method according to claim 4, characterized in that: The step of determining the spacing between the tire and the wheel cover according to the distance measurement data measured by all laser beams, and verifying whether the horizontal deformation of the tire in the driving state will cause the tire to scratch the wheel cover, includes: According to the distance measurement data measured by each laser beam, obtaining the maximum spacing distance and the minimum spacing distance between the tire and the wheel cover when the vehicle is in a driving state; Obtaining a deviation interval between the tire and the wheel cover according to the maximum spacing distance, the minimum spacing distance and the designed target spacing; When the deviation interval is within a preset safety interval, determining that there is no risk of scratching between the tire and the wheel cover; When the deviation interval is not within a preset safety interval, it is determined that there is a risk of scratching between the tire and the wheel cover.

7. The tire scratch detection method according to claim 6, characterized in that: The step of obtaining the maximum spacing distance and the minimum spacing distance between the tire and the wheel cover when the vehicle is in a driving state according to the distance measurement data measured by each laser beam comprises: In each laser ranging cycle, the ranging data measured by each laser beam is sequentially arranged from the wheel cover to the tire direction to obtain the data arrangement result of each laser ranging cycle; Determine the interval between the tire and the wheel cover in all laser ranging cycles according to the data arrangement result and the corresponding ranging data; The maximum value and the minimum value of all interval distances are determined as the maximum interval distance and the minimum interval distance, respectively.

8. The tire scratch detection method according to claim 7, characterized in that: Determining the interval distance between the tire and the wheel cover in all laser ranging cycles according to the data arrangement result and the corresponding ranging data includes: Difference is calculated for two adjacent distance measurement data in the data arrangement result, and when the difference result is less than a preset difference value, the laser beam corresponding to the tire is determined as the termination laser beam; The distance between the reference laser beam on the side close to the wheel cover and the termination laser beam is determined as the spacing distance.

9. The tire scratch detection method according to claim 6, characterized in that: Before obtaining the maximum spacing distance and the minimum spacing distance between the tire and the wheel cover when the vehicle is in a driving state according to the distance measurement data measured by each laser beam, the method further includes: Data cleaning is performed on the distance measurement data measured by each laser beam in each laser distance measurement cycle to remove abnormal data caused by splashing foreign matter in the distance measurement data.

10. A tire scratch detection device, characterized in that: The device comprises: an acquisition module, used for controlling a distance measuring terminal to emit laser beams at intervals along the horizontal center line of the tire to perform laser distance measurement when the vehicle is in a driving state, so as to obtain distance measurement data measured by each laser beam, wherein the distance measuring terminal is installed on the outer side of the tire, and the distance measuring terminal and the wheel cover on the outer periphery of the tire remain relatively stationary when the vehicle is in a driving state; The processing module is used to determine the distance between the tire and the wheel cover according to the distance measurement data measured by all laser beams, and to verify whether the horizontal deformation of the tire in the driving state will cause the tire to scratch the wheel cover.

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