Method and device for testing antiskid safety coefficient of road surface

Abstract

The invention relates to the technical field of pavement anti-skid safety coefficient testing, and provides a pavement anti-skid safety coefficient testing method and device, and the method comprises the following steps: driving a tire to rotate, and obtaining the initial set rotation speed V2 of the tire; a test environment module is controlled, so that the environment in the test space reaches preset environment parameters; controlling the tire to move, enabling the rotating tire to be in contact with the pavement test piece, and obtaining the rotating speed V1 of the tire after contact; the anti-skid safety coefficient S is calculated through a formula S = V2 / V1 * K; wherein K is the axle load coefficient of the pavement test piece. According to the invention, during testing, the anti-skid safety coefficient is obtained through detection of the initial speed and the speed after contact with the pavement test piece and based on the axle load coefficient of the pavement test piece, and the anti-skid performance can be visually reflected through the anti-skid safety coefficient. And the performance test can be quickly realized through the test device, and the accuracy of the performance test is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of testing the anti-slip safety coefficient of road surfaces, and particularly to a testing method and a testing device for the anti-slip safety coefficient of road surfaces. Background Art

[0002] The anti-slip performance of asphalt pavements is crucial for driving safety. For wet road surfaces, the contact between the tire and the road surface is significantly weakened under the influence of the fluid, resulting in the vehicle being prone to skidding and losing control when braking or turning. Due to the existence of the water film, the friction coefficient between the tire tread and the road surface will be correspondingly weakened. The anti-slip performance of asphalt pavements at high speeds is much less than that of dry road surfaces, the overall driving stability decreases, and hydroplaning is more likely to occur during emergency braking, leading to traffic accidents. Therefore, accurately evaluating the anti-slip ability of vehicles in complex environments such as wet conditions can provide an important basis for road design, construction, and maintenance.

[0003] In related technical solutions, during the road design stage, the anti-slip performance of road surfaces is mainly evaluated by using a pendulum friction coefficient tester to measure the friction coefficient of the road surface and the manual sand paving method to measure the texture depth of the road surface. However, these two methods are greatly affected by human subjective factors and the environment, easily leading to defects such as a large coefficient of variation in test results, poor test reproducibility, and inaccurate evaluation of test results. Moreover, the test environment of these two methods is single and cannot simulate the complex environment encountered by vehicles during actual driving. Therefore, there is still a lack of an intuitive and accurate comprehensive evaluation index for anti-slip performance. Summary of the Invention

[0004] The present invention provides a testing method and a testing device for the anti-slip safety coefficient of road surfaces to solve the defects in the prior art that it is difficult to intuitively evaluate the anti-slip performance and it is difficult to efficiently and accurately implement the anti-slip performance test.

[0005] The present invention provides a testing method for the anti-slip safety coefficient of road surfaces, including the following steps: Drive the tire to rotate and obtain the initial set rotational speed V2 of the tire; Control the test environment module to make the environment in the test space reach the preset environmental parameters; Control the movement of the tire to make the rotating tire contact the road test piece and obtain the rotational speed V1 of the tire after contact; Calculate the anti-slip safety coefficient S through the following formula: where K is the axle load coefficient of the road test piece.

[0006] According to the test method for the anti-slip safety coefficient of the road surface provided by the present invention, the movement of the tire is controlled so that the rotating tire contacts the road surface specimen, and the rotational speed V1 of the tire after contact is obtained. Specifically, it includes the following steps: Place the road surface specimen directly below the tire. When the tire rotates to a preset speed, control the tire to descend so that the tire contacts the road surface specimen for 1 second and then rises. While rising, obtain the rotational speed V1 of the tire after contact.

[0007] The second aspect of the present invention provides a test device based on the above test method for the anti-slip safety coefficient of the road surface, including: a box body, a test environment module, a driving device, and a lifting device; a test space is formed inside the box body, and a specimen bearing platform is provided in the test space, and the specimen bearing platform is used for installing the road surface specimen; the test environment module is arranged in the test space, and the test environment module is used to simulate a preset environment; the output end of the driving device is provided with a rotating shaft, and a tire is connected to the end of the rotating shaft, and the tire is located directly above the road surface specimen; the lifting device is connected to the driving device, and the lifting device is used to drive the driving device to move in the vertical direction so that the tire contacts or separates from the road surface specimen.

[0008] According to the test device provided by the present invention, it further includes an electrical control system and a data acquisition system. The data acquisition system is used to collect the environmental parameters in the test space and the rotational speed of the tire, and the electrical control system is used to control the actions of the test environment module, the driving device, and the lifting device.

[0009] According to the test device provided by the present invention, the electrical control system includes an industrial control computer and a control cabinet. The industrial control computer is arranged inside the control cabinet. The test environment module, the driving device, and the lifting device are all electrically connected to the industrial control computer; a display and interaction terminal is provided on the cabinet body of the control cabinet, and the display and interaction terminal is electrically connected to the industrial control computer.

[0010] According to the test device provided by the present invention, an emergency stop button and a device switch are further provided on the control cabinet, and the emergency stop button and the device switch are arranged side by side.

[0011] According to the test device provided by the present invention, the data acquisition system includes a temperature and humidity sensor and a rotational speed sensor. The temperature and humidity sensor is connected to the box body and is located at the top of the test space, and the rotational speed sensor is connected to the rotating shaft.

[0012] According to the testing device provided by the present invention, the testing environment module includes a precipitation component and a temperature control component. The precipitation component includes a spraying part, which is connected to the box body and located directly above the tire. The temperature control component includes a heating module and a cooling module, both of which are connected to the box body and located within the testing space.

[0013] According to the testing device provided by the present invention, the box body is provided with a drainage port and a water inlet. The drainage port is communicated with the testing space and is used for discharging the accumulated water in the testing space. The water inlet is connected to the spraying part and is used for inputting spraying water.

[0014] According to the testing device provided by the present invention, the specimen platform is provided with a receiving groove for placing the road specimen. Fixing bolts are provided on both sides of the receiving groove and are used for locking the road specimen.

[0015] A testing method and a testing device for the anti-slip safety coefficient of a road surface provided by the present invention obtain the anti-slip safety coefficient by detecting the initial speed and the speed after contacting the road specimen during the test and based on the axle load coefficient of the road specimen itself. The anti-slip safety coefficient can intuitively reflect the quality of the anti-slip performance. And the performance test can be quickly realized through the testing device, improving the accuracy of the performance test. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic flow chart of the testing method for the anti-slip safety coefficient of the road surface provided by the present invention.

[0018] Figure 2 It is a schematic structural diagram of the testing device provided by the present invention.

[0019] Figure 3 It is a schematic structural diagram of the connection between the lifting device and the driving device in the testing device provided by the present invention.

[0020] Figure 4 It is a schematic structural diagram of the tire in the testing device provided by the present invention.

[0021] Reference Signs: 1. Box body; 11. Test space; 12. Road test piece; 13. Test piece bearing platform; 14. Platform part; 141. Inclined surface structure; 15. Drainage port; 16. Water inlet; 17. Fixed bolt; 2. Electrical cabinet; 21. Display screen; 22. Input keyboard; 23. Equipment switch; 24. Emergency stop button; 3. Equipment box; 4. Tire; 6. Spraying part; 7. Temperature and humidity sensor; 8. Driving device; 81. Rotating shaft; 82. Rotation speed sensor; 9. Lifting device; 91. Lifting main shaft; 92. Connecting piece. Detailed implementation manner

[0022] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0023] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for facilitating the description of the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the embodiments of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0025] In the embodiments of the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0026] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0027] For the test of the anti-slip safety performance of the road surface, in the related art, either the friction coefficient of the road surface is measured by a conventional pendulum friction coefficient tester and the manual sand paving method is used for testing. This kind of test has great limitations and is difficult to intuitively, truly and accurately reflect the performance of the road surface. Or the friction coefficient is tested by a test device. This kind of test method is difficult to intuitively and accurately reflect the anti-slip safety performance of the road surface. Therefore, the present invention provides a brand-new evaluation index, which can achieve an intuitive and accurate evaluation of the comprehensive anti-slip performance.

[0028] The following combines Figure 1 Describe a test method for the anti-slip safety coefficient of a road surface of the present invention, including the following steps: Step S10, drive the tire 4 to rotate and obtain the initial set rotation speed V2 of the tire 4. Specifically, before the test, it is necessary to make the tire 4 rotate to a preset speed and obtain the set rotation speed.

[0029] Step S20, control the test environment module to make the environment in the test space 11 reach the preset environmental parameters. Specifically, the tire 4 needs to perform test operations in the test space 11 to be able to simulate the real use scenario and improve the accuracy of the test.

[0030] Step S30: Control the movement of the tire 4 so that the rotating tire 4 contacts the road test piece 12, and obtain the rotational speed V1 of the tire 4 after contact; calculate the anti-slip safety factor S through the following formula: where K is the axle load coefficient of the road test piece 12.

[0031] Specifically, it includes the following steps: Place the road test piece 12 directly below the tire 4. When the tire 4 rotates to a preset speed, control the tire 4 to descend so that the tire 4 contacts the road contact piece for 1 second and then rises. While rising, obtain the rotational speed V1 of the tire 4 after contact.

[0032] Specifically, the axle load coefficient of the road test piece 12 is related to its own thickness, material, and hierarchical structure. It can be obtained through standards such as the "Technical Standards for Highway Engineering" (JTGD30 - 2015) and the "Design Code for Highway Pavements" (JTGD50 - 2017). These specifications usually give the calculation methods and design requirements for standard axle loads, design axle loads, and axle load coefficients to obtain the axle load coefficient K of the road test piece 12. After the road test piece 12 in this embodiment is determined, it can be determined through query and calculation and other methods, and the determined coefficient is stored in the test device so that the test device can directly call it during testing to achieve rapid calculation.

[0033] It can be understood that by contacting the rotating tire 4 with the road test piece 12, obtaining the rotational speeds before and after the test at the same time, and associating the ratio of the rotational speeds of the tire 4 before and after contact with the axle load coefficient K, the intuitive representation of the anti-slip safety performance is realized. Specifically, the ratio of the rotational speeds of the tire 4 before and after contact is the change rate of the rotational speed of the tire 4. Multiplying the change rate of the rotational speed by the axle load coefficient K of the road test piece 12 is related to the vehicle traction, vehicle braking force, and dynamic response of the vehicle under the conditions of the road test piece 12, thus realizing the intuitive representation of the anti-slip safety performance and being able to intuitively represent the anti-slip performance of the vehicle.

[0034] The second aspect of the present invention provides a test device based on the test method of the road surface anti-skid safety factor, including a box 1, a test environment module, a driving device 8 and a lifting device 9; a test space 11 is formed in the box 1, and a test piece support 13 is provided in the test space 11, and the test piece support 13 is used to install the road test piece 12; the test environment module is arranged in the test space 11, and the test environment module is used to simulate a preset environment; the output end of the driving device 8 is provided with a rotating shaft 81, and the end of the rotating shaft 81 is connected to a tire 4, and the tire 4 is located directly above the road test piece 12; the lifting device 9 is connected to the driving device 8, and the lifting device 9 is used to drive the driving device 8 to move in the vertical direction so that the tire 4 is in contact with or separated from the road test piece 12. When testing the road surface anti-skid safety factor, it is necessary to simulate the real use scenario so as to accurately measure the anti-skid safety factor of the road test piece 12. In this embodiment, the test space 11 in the box 1 and the test environment module are used to simulate various natural weather conditions, so that the anti-skid safety factor of the road test piece 12 can be tested in various environments, thereby improving the accuracy of the test.

[0035] Specifically, the interior of the box 1 has a cavity structure, and a test space 11 is formed by the cavity structure, and the test is implemented through the test space 11. When the test is carried out, the test piece support 13 can carry the road test piece 12, the tire 4 is connected to the driving device 8 by transmission, and the tire 4 is in contact with the road test piece 12, so that the anti-skid performance of the road test piece 12 can be tested by the rotation speed of the test wheel before and after the contact. The test method of the tool can be tested by the aforementioned test method.

[0036] Furthermore, the driving device 8 includes a driving motor, and the output end of the driving motor is connected to the rotating shaft 81, so as to drive the rotating shaft 81 to rotate, and drive the tire 4 to rotate through the rotating shaft 81. When specifically connected, a flange is provided at the end of the rotating shaft 81, and a bolt hole is provided on the wheel hub of the tire 4, so that the tire 4 is connected to the flange by bolts, so that the connection of the tire 4 is more stable.

[0037] like Figure 3 As shown, the lifting device 9 includes a lifting drive device 8 and a lifting main shaft 91. One end of the lifting main shaft 91 is connected to the output of the lifting drive device 8, and the other end of the lifting main shaft 91 is connected to the drive device 8, so that it can drive the drive device 8 and the tire 4 to move in the vertical direction.

[0038] Specifically, the lifting device 9 can be a linear drive motor, a hydraulic cylinder device or a pneumatic cylinder device. A connecting member 92 is provided at the end of the lifting main shaft 91, and the connection with the drive device 8 is achieved through the connecting member 92. During the lifting movement of the lifting device 9, the drive device 8 and the tire 4 are driven to move up and down, so as to realize the contact and separation operations with the road test piece 12. Preferably, a linear stepper motor can be used for driving. The output end of the linear stepper motor is connected to the lifting main shaft 91, and the vertical drive is realized through the linear stepper motor. The precise control of the lifting distance can be achieved by means of the linear stepper motor, so as to realize the precise control of contact and separation.

[0039] When specifically arranged, buffer layers are provided on the side walls opposite to each other in the test space 11. The buffer layers can prevent the impact or collision caused accidentally during equipment installation, so as to effectively protect the box body 1 and improve the overall safety performance and structural stability of the device.

[0040] In a specific application, an equipment box 3 is connected to the back of the box body 1. The equipment box 3 has electrical connection lines and the installation and movement space for the equipment. Specifically, both the lifting device 9 and the drive device 8 are arranged in the equipment box 3. A vertical chute is opened on the connecting wall surface between the equipment box 3 and the box body 1. The rotating shaft 81 extends into the test space 11 from the chute, so as to drive the rotating shaft 81 and the tire 4 to move up and down when the drive device 8 moves up and down. Of course, for the electrical connection of the drive device 8, a cable trough can be arranged in the equipment box 3, and the cables of the drive device 8 are placed through the cable trough, so as to improve the safety during the movement of the drive device 8.

[0041] In some embodiments provided by the present invention, the test device further includes an electrical control system and a data acquisition system. The data acquisition system is used to collect the environmental parameters in the test space 11 and the rotation speed of the tire 4, and the electrical control system is used to control the actions of the test environment module, the drive device 8 and the lifting device 9. The electrical control system can perform automatic tests based on the control logic (i.e., the above-mentioned test method for the road surface anti-slip safety factor), avoiding the interference of human factors and improving the test accuracy.

[0042] It can be understood that when performing environmental simulation, it is necessary to feedback whether the currently simulated environment meets the preset requirements. Therefore, by setting up a data acquisition system for collection and feedback, the actions of the test environment module can be adjusted until the preset environmental requirements are met.

[0043] In the embodiments provided according to the present invention, the electrical control system includes an industrial control computer and a control cabinet. The industrial control computer is disposed inside the control cabinet. The test environment module, the driving device 8, and the lifting device 9 are all electrically connected to the industrial control computer; a display interaction terminal is provided on the cabinet body of the control cabinet, and the display interaction terminal is electrically connected to the industrial control computer. When conducting tests, it is necessary to perform environment simulation and contact actions through the execution components. In this embodiment, the industrial control computer is used to control the test environment module, the driving device 8, and the lifting device 9, so as to achieve automated operations, and real-time feedback and real-time interaction can be realized through the display interaction terminal, improving its convenience.

[0044] Specifically, the display interaction terminal includes a touch display screen 21 and an input keyboard 22. The touch display screen 21 can display the final test results, and the input keyboard 22 can achieve custom input and custom interaction, thereby improving its flexibility. For example, after obtaining the axle load coefficient K of the road specimen 12, it can be input through the display interaction terminal and stored in the industrial control computer. There is a memory in the industrial control computer, and various input data and transportation logic can be stored in the memory, so as to realize automatic calculation of data and display of results during the test, improving the convenience of the test.

[0045] In some embodiments, an emergency stop button 24 and a device switch 23 are further provided on the control cabinet. The emergency stop button 24 and the device switch 23 are arranged side by side. Through the settings of the emergency stop button 24 and the device switch 23, the start-up and shutdown can be carried out quickly, improving the convenience and safety performance.

[0046] Specifically, the emergency stop button 24 and the device switch 23 are both electrically connected to the industrial control computer, and they can control the power input of the industrial control computer. When emergency stop is required, the power input can be quickly cut off through the emergency stop button 24, thereby improving the safety performance of the device.

[0047] It should be known that the specific connection circuit for the emergency stop button 24 and the device switch 23 is a conventional connection circuit in the related art, and those skilled in the art can easily know the specific circuit through existing materials, so it will not be elaborated here.

[0048] In some embodiments provided according to the present invention, the data acquisition system includes a temperature and humidity sensor 7 and a rotational speed sensor 82. The temperature and humidity sensor 7 is connected to the box body 1 and is located at the top of the test space 11. The rotational speed sensor 82 is connected to the rotating shaft 81. Through the setting of the temperature and humidity sensor 7, the temperature and humidity in the test space 11 can be detected, so as to realize the detection of the environmental state in the test space 11. Through the setting of the rotational speed sensor 82, the real-time detection of the rotational speed of the tire 4 can be realized, so as to measure the rotational speed before and after contact, and the measured data is fed back to the industrial control computer, and then the road surface anti-skid safety coefficient can be obtained through the processing of the data by the industrial control computer.

[0049] Specifically, the temperature and humidity sensor 7 is connected to the box body 1 and is located inside the test space 11. The sensing end of the temperature and humidity sensor 7 faces the test space 11, so as to be able to sense the temperature and humidity inside the test space 11 and be able to adjust even through the feedback data. The rotational speed sensor 82 can sense the rotational speed of the tire 4 in real time, so that the rotational speed of the tire 4 can be accurately obtained after contact.

[0050] In a specific embodiment, the test environment module includes a precipitation component and a temperature control component. The precipitation component includes a spraying part 6. The spraying part 6 is connected to the box body 1 and is located directly above the tire 4. The temperature control component includes a heating module (not shown in the figure) and a cooling module (not shown in the figure). Both the heating module and the cooling module are connected to the box body 1 and are located inside the test space 11. It is necessary to simulate the external environment inside the test space 11. For example, it is necessary to simulate precipitation, icing, water accumulation, etc. under different temperatures. In this embodiment, the precipitation is realized through the spraying part 6, and it is directly facing the tire 4 and the road test piece 12, which can fully realize the simulation of the scenario.

[0051] Specifically, the heating module includes an electric heating component. The electric heating component is connected to the box body 1 and can heat the test space 11. The cooling module includes a liquid cooling module. The liquid cooling module is connected to the box body 1 and can cool the temperature of the test space 11, so as to be able to realize operations such as icing. Of course, the cooling module can also be through external air conditioners and other means to realize the overall cooling, so as to be able to realize icing and temperature adjustment.

[0052] In some embodiments, a drain port and a water inlet 16 are provided on the box body 1. The drain port is communicated with the test space 11, and the drain port is used to drain the accumulated water in the test space 11. The water inlet 16 is connected to the spraying part 6, and the water inlet 16 is used to input spraying water. Through the setting of the drain port, the accumulated water in the test space 11 can be quickly discharged, and spraying water can be input through the water inlet 16, so as to realize the simulation of precipitation and improve the accuracy of the test.

[0053] Specifically, both the drain port and the water inlet 16 are connected to the bottom of the box body 1. Among them, the water inlet 16 is connected to the spraying part 6 through a flow channel or a pipeline, so as to be able to input water to the spraying part 6 and realize simulated precipitation through the spraying part 6. Specifically, when setting, the drain port and the water inlet 16 are arranged side by side. The side-by-side arrangement of the drain port and the water inlet 16 can facilitate the connection of the drain pipeline and the water inlet pipeline.

[0054] In specific applications, electromagnetic valves can be provided at the positions of the drain port and the water inlet 16. Through the electromagnetic valves, the opening or closing of the drain passage and the water inlet passage can be realized.

[0055] In a specific embodiment, a receiving groove for placing the road specimen 12 is provided on the specimen bearing platform 13. Fixing bolts 17 are provided on both sides of the receiving groove, and the fixing bolts 17 are used to lock the road specimen 12. The road specimen 12 will contact the tire 4 during the test, which requires maintaining the stability of the road specimen 12. In this embodiment, the installation of the road specimen 12 is realized by the fixing bolts 17 on both sides, improving the stability of the installation of the road specimen 12 and preventing the road specimen 12 from disengaging from the specimen bearing platform 13 during the test.

[0056] Specifically, the specimen bearing platform 13 is connected to the platform part 14, and the platform part 14 has an inclined surface structure 141. The drain outlet of the box body 1 is located at the bottom of the inclined surface structure 141, so as to realize rapid drainage. The specimen bearing platform 13 is connected to the inclined surface of the platform part 14, and the surface of the specimen bearing platform 13 remains horizontal. During the precipitation mode, the water flow can flow out through the inclined surface of the platform part 14, preventing the precipitation from accumulating inside the box body 1.

[0057] It can be understood that the stability of the installation of the road specimen 12 is improved by means of the receiving groove and the fixing bolts 17, preventing disengagement during the test process.

[0058] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment combines the rotational speeds before and after the contact of the tire 4 and the axle load coefficient of the road specimen 12 to realize an intuitive reaction of the road surface anti-slip safety factor. And efficient and accurate testing can be achieved through the testing device.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for testing the anti-skid safety factor of a road surface, characterized in that: The following steps are involved: Drive the tire to rotate and obtain the initial set rotation speed V2 of the tire; Control the test environment module so that the environment in the test space reaches the preset environmental parameters; Control the movement of the tire so that the rotating tire contacts the road test piece, and obtain the tire rotation speed V1 after contact; The anti-slip safety factor S is calculated by the following formula: Where K is the axle load factor of the road specimen.

2. The method for testing the road surface anti-skid safety factor according to claim 1, characterized in that: Controlling the movement of the tire so that the rotating tire contacts the road test piece and obtaining the tire rotation speed V1 after contact; specifically comprising the following steps: The road test piece is placed directly under the tire. When the tire rotates to a preset speed, the tire is controlled to descend so that the tire contacts the road contact piece for 1 second and then rises up. While rising up, the rotation speed V1 of the tire after contact is obtained.

3. A testing device based on the testing method of road surface anti-skid safety factor according to claim 1 or 2, characterized in that: include: A box body, wherein a test space is formed in the box body, wherein a test piece support is provided in the test space, and the test piece support is used to install a road test piece; A test environment module, the test environment module is arranged in the test space, and the test environment module is used to simulate a preset environment; A driving device, wherein a rotating shaft is provided at an output end of the driving device, and a tire is connected to an end of the rotating shaft, and the tire is located directly above the road test piece; A lifting device is connected to the driving device, and is used to drive the driving device to move in a vertical direction so that the tire contacts or separates from the road test piece.

4. The testing device according to claim 3, characterized in that: It also includes an electrical control system and a data acquisition system. The data acquisition system is used to collect environmental parameters in the test space and the rotation speed of the tire. The electrical control system is used to control the actions of the test environment module, the driving device and the lifting device.

5. The testing device according to claim 4, characterized in that: The electrical control system comprises an industrial computer and a control cabinet, wherein the industrial computer is arranged in the control cabinet, and the test environment module, the driving device and the lifting device are all electrically connected to the industrial computer; A display interaction terminal is provided on the cabinet body of the control cabinet, and the display interaction terminal is electrically connected to the industrial control machine.

6. The testing device according to claim 5, characterized in that: The control cabinet is also provided with an emergency stop button and an equipment switch, and the emergency stop button and the equipment switch are arranged side by side.

7. The testing device according to claim 4, characterized in that: The data acquisition system includes a temperature and humidity sensor and a rotation speed sensor. The temperature and humidity sensor is connected to the box and is located at the top of the test space. The rotation speed sensor is connected to the rotating shaft.

8. The testing device according to claim 3, characterized in that: The test environment module includes a precipitation component and a temperature control component, the precipitation component includes a spray part, the spray part is connected to the box body and is located directly above the tire; The temperature control component includes a heating module and a cooling module. Both the heating module and the cooling module are connected to the box and are located in the test space.

9. The testing device according to claim 8, characterized in that: The box body is provided with a drain port and a water inlet, the drain port is communicated with the test space, and the drain port is used to discharge the accumulated water in the test space; The water inlet is connected to the spraying part, and the water inlet is used to input spraying water.

10. The testing device according to claim 3, characterized in that: The test piece support platform is provided with a receiving groove for placing the road test piece, and fixing bolts are provided on both sides of the receiving groove, and the fixing bolts are used to lock the road test piece.

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