Testing device for testing ABS performance of automobile tire

Abstract

The invention relates to the technical field of automobile safety, and discloses a test device for testing the ABS performance of an automobile tire, and the device comprises a bottom-layer pedestal which is used for fixing a tested vehicle; the frame is arranged at the bottom of the bottom-layer base and used for supporting the bottom-layer base; the motor is arranged in the middle of the frame, two output ends of the motor are fixedly connected with gears through transmission shafts, and the motor is used for assisting in driving a test vehicle to move; the test road surface is arranged at the bottom of the frame, the upper side of the test road surface is fixedly connected with a track rack, and the gear is meshed with the track rack and used for enabling a test vehicle to move along the track rack. According to the invention, the temperature and humidity of the test environment are accurately adjusted, the test road adhesion coefficient can be varied, and the environment change is responded in real time, so that the accuracy, consistency and reliability of the ABS performance test are effectively improved, and the reliability and repeatability of the test data are ensured by restraining the vehicle displacement.

Description

Technical Field

[0001] The invention relates to the technical field of automobile safety, in particular to a testing device for testing ABS performance of automobile tires. Background Art

[0002] With the increasing demand for automobile safety, ABS (anti-lock braking system) has been widely used in modern automobiles as an important part of the vehicle safety system. In order to ensure the performance and safety of the ABS system, testing the ABS performance of automobile tires has become a necessary link.

[0003] Existing test devices usually use mechanized devices to simulate the test environment through vehicle driving or rotating equipment. Such devices test the braking performance of tires by rotating the test road surface or pushing the vehicle through traction. These systems can simulate different road adhesion conditions and test the response of the ABS system by changing the road material or adhesion.

[0004] However, the testing methods of the prior art have some obvious deficiencies. First, the testing environment of the prior test device is relatively simple, and the changes in temperature and humidity are difficult to accurately control, and cannot truly simulate the changeable actual road environment. In addition, the prior device can usually only be tested in a static or limited motion state, and cannot effectively simulate the dynamic changes of the vehicle during driving. In addition, the prior art fails to fully solve the error problem caused by vehicle displacement or road adhesion changes during the test process. These deficiencies lead to a lack of consistency and high precision in the test results, affecting the accuracy and reliability of the ABS system performance evaluation. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a test device for testing the ABS performance of automobile tires, which solves the problems of single testing environment and lack of precise control in the prior art.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A test device for testing the ABS performance of automobile tires, comprising:

[0007] A bottom base for fixing the test vehicle;

[0008] A frame, which is arranged at the bottom of the bottom base and is used to support the bottom base;

[0009] An electric motor is arranged in the middle of the frame, and both output ends of the electric motor are fixedly connected with gears through a transmission shaft, so as to assist in driving the test vehicle to move;

[0010] A plurality of test pavements are arranged at the bottom of the frame, a track rack is fixedly connected to the upper side of the test pavements, the gear and the track rack are meshed, and are used to make the test vehicle move along the track rack. The plurality of test pavements are used to adjust the adhesion coefficient of the pavement during the test, so that the test device can simulate a variety of pavement environments more realistically;

[0011] A cooling and heating control unit and a spraying unit, both of which are arranged outside the test road surface and are used to adjust the temperature and humidity of the test road surface to simulate tire performance under various environments;

[0012] The monitoring system is used to monitor the temperature and humidity of the test road surface so that the adjusted temperature and humidity reach the required range.

[0013] Preferably, a plurality of fixing brackets are installed in the middle of the frame, and the motor is fixedly connected to one end of the fixing bracket away from the frame, so as to fix the motor and keep the motor stable during operation.

[0014] Preferably, a threaded hole is provided in the middle of the frame, and a through hole is provided in the middle of the bottom base, the through hole is used for connecting bolts to enter, and the threaded hole is used for threaded connection with the connecting bolts to connect and fix the bottom base and the frame.

[0015] Preferably, the transmission shaft is fixedly connected to the gear via a semicircular key, and the semicircular key is used to transmit the power output by the motor to the gear.

[0016] Preferably, a bearing is fixedly connected to the middle of the frame, and the transmission shaft is fixedly connected to the inner ring of the bearing. The bearing is used to support the transmission shaft to ensure the stability of the rotation of the transmission shaft in the frame.

[0017] Preferably, a mounting groove is provided on the upper side of the bottom base, and the mounting groove is used for conveniently installing the test vehicle.

[0018] Preferably, the monitoring system comprises:

[0019] The temperature and humidity sensor modules are distributed above the test road surface and are used to monitor the temperature and humidity of the test road surface in real time;

[0020] A data acquisition module, connected to the temperature and humidity sensor module, for collecting sensor signals and generating corresponding digital signals;

[0021] A central control module, in communication with the data acquisition module, for analyzing the digital signal and generating an environment adjustment instruction;

[0022] An actuator, including a cold and hot control unit and a spraying unit, connected to the central control module, for adjusting the temperature and humidity of the test road surface according to the environmental adjustment instruction;

[0023] The display and communication module is connected to the central control module and is used to display the temperature and humidity status and adjustment parameters of the test road surface in real time, and supports uploading the monitoring data to a remote terminal.

[0024] Preferably, the arrangement of the temperature and humidity sensor modules includes:

[0025] According to the area of ​​the test road surface and the monitoring accuracy requirements, multiple temperature and humidity sensors are evenly distributed to ensure that all areas of the test road surface are within the monitoring range;

[0026] The temperature and humidity data at different locations on the test road are obtained through temperature and humidity sensors, and distributed monitoring results are generated.

[0027] Preferably, the work of the central control module includes:

[0028] Receiving the temperature and humidity monitoring data transmitted by the data acquisition module;

[0029] Analyze the monitoring data in combination with the test requirements to generate average values ​​of temperature and humidity;

[0030] An adjustment instruction is generated according to the analysis result and transmitted to the actuator.

[0031] Preferably, the temperature and humidity adjustment of the actuator includes:

[0032] When the test road surface temperature is lower than the target temperature, the cold and hot control unit is started to heat the test road surface;

[0033] When the humidity of the test road surface is lower than the target humidity, the spraying unit is started to spray and adjust the test road surface;

[0034] Adjust the operating status of the hot and cold control unit and the spraying unit according to the real-time monitoring results to keep the temperature and humidity of the test road surface stable at the target values.

[0035] The present invention provides a test device for testing the ABS performance of automobile tires. It has the following beneficial effects:

[0036] 1. The present invention can simulate different test road surfaces through the monitoring system, the hot and cold control unit and the spraying unit, and control different temperature and humidity scenes of the test road surface, so as to make the ABS performance test scenes more diversified, ensure that the experimental environment is stable at the preset target value, thereby improving the accuracy and consistency of the tire ABS performance test. Through the dynamic adjustment function, the system can respond to environmental changes in real time to ensure the reliability and repeatability of the test data. In addition, by paving multiple test road surfaces at the same time, the adhesion coefficient of the road surface can be adjusted, so that the test device can simulate the diversified road environment more realistically, and at the same time provide a more accurate basis for the optimization and adjustment of the ABS system.

[0037] 2. The present invention can constrain the lateral and vertical displacement of the vehicle, so that the vehicle moves only in the longitudinal direction, thereby preventing the test results from being affected by changes in lateral force, road surface conditions, and load. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a plan view of the present invention;

[0039] Figure 2 For the present invention Figure 1 Schematic diagram of the cross section at AA in the middle;

[0040] Figure 3 For the present invention Figure 1 Schematic diagram of the cross section at the middle BB;

[0041] Figure 4 It is a structural schematic diagram of the installation slot of the present invention;

[0042] Figure 5 is a system structure diagram of the monitoring system of the present invention;

[0043] Figure 6 It is a schematic diagram of the adhesion rate of the test road surface of the present invention.

[0044] Among them, 1. electric motor; 2. bottom base; 3. transmission shaft; 4. frame; 5. gear; 6. track rack; 7. bearing; 8. fixing frame; 9. threaded hole; 10. test pavement; 11. installation groove. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Please refer to the attached Figure 1 -Attached Figure 5The embodiment of the present invention provides a test device for testing the ABS performance of automobile tires, comprising:

[0047] The bottom base 2 is used to fix the test vehicle. The bottom base 2 provides a firm support and vehicle fixing function to ensure the stability of the test vehicle, thus providing a guarantee for the accuracy and repeatability of the experimental data.

[0048] A frame 4 is provided at the bottom of the bottom base 2 and is used to support the bottom base 2. The design of the frame 4 ensures the overall strength and stability of the test device and reduces mechanical errors that occur during the test;

[0049] The motor 1 is arranged in the middle of the frame 4. Both output ends of the motor 1 are fixedly connected to the gear 5 through the transmission shaft 3, which is used to assist in driving the test vehicle to move. Through the cooperation of the motor 1, the transmission shaft 3 and the gear 5, the test vehicle can achieve stable and continuous movement, meet the requirements of various speed and acceleration tests, and provide accurate experimental conditions for ABS performance evaluation;

[0050] A plurality of test pavements 10 are arranged at the bottom of the frame 4. A track rack 6 is fixedly connected to the upper side of the test pavement 10. The gear 5 and the track rack 6 are meshed to make the test vehicle move along the track rack 6. The plurality of test pavements 10 are used to adjust the adhesion coefficient of the pavement during the test, so that the test device can simulate a variety of pavement environments more realistically, so that the test personnel can compare the working conditions of the ABS system under different friction conditions, and provide a more accurate basis for the optimization and adjustment of the ABS system. Through the guidance of the track rack 6, the controllability of the test vehicle's motion path can be guaranteed, and the deviation of the experimental results caused by lateral slip or error can be avoided;

[0051] The hot and cold control unit and the spraying unit are both arranged outside the test road surface 10, and are used to adjust the temperature and humidity of the test road surface 10 to simulate the tire performance under various environments. The hot and cold control unit can adjust the temperature of the test road surface 10, and the tire ABS performance test under multiple temperature conditions can be completed within a limited time, thereby improving the experimental efficiency. The spraying unit can simulate rainy days or wet road environments, thus expanding the application scenarios of the experimental device and making the test results closer to the actual driving environment.

[0052] The monitoring system is used to monitor the temperature and humidity of the test road surface 10 so that the adjusted temperature and humidity reach the required range. Through the monitoring system, the test road surface 10 can be monitored in real time and adjusted to the required temperature and humidity, thereby improving the test effect of the detection device.

[0053] Please refer to the attached Figure 1 -Attached Figure 3In a preferred embodiment of the present invention, a plurality of fixing brackets 8 are installed in the middle of the frame 4, and the motor 1 is fixedly connected to one end of the fixing bracket 8 away from the frame 4, so as to fix the motor 1 and keep the motor 1 stable during operation. The fixing bracket 8 is used to connect the motor 1 and the frame 4, thereby ensuring that the motor 1 remains stable during high-load operation, avoiding the test accuracy affected by vibration or loose connection, and improving the durability of the device.

[0054] Please refer to the attached Figure 1 -Attached Figure 3 In a preferred embodiment of the present invention, a threaded hole 9 is provided in the middle of the frame 4, and a through hole is provided in the middle of the bottom base 2. The through hole is used for the connection bolt to enter, and the threaded hole 9 is used for threaded connection with the connection bolt to connect and fix the bottom base 2 and the frame 4. The design of the threaded hole 9 and the through hole enables the frame 4 and the bottom base 2 to be firmly connected by bolts, avoiding deformation or performance degradation of the device caused by looseness or offset during operation, while simplifying the assembly and maintenance process and improving the installation efficiency.

[0055] Please refer to the attached Figure 1 -Attached Figure 3 In a preferred embodiment of the present invention, the transmission shaft 3 is fixedly connected to the gear 5 through a semicircular key. The semicircular key is used to transmit the power output by the motor 1 to the gear 5. The semicircular key connection between the transmission shaft 3 and the gear 5 can ensure efficient power transmission while avoiding slippage or looseness during operation, thereby improving the smoothness and durability of the transmission. The semicircular key bears the shear force between the transmission shaft 3 and the gear 5 through its working surface, thereby ensuring stable transmission of power under high torque conditions.

[0056] Please refer to the attached Figure 1 -Attached Figure 3 In a preferred embodiment of the present invention, a bearing 7 is fixedly connected to the middle part of the frame 4, and the transmission shaft 3 is fixedly connected to the inner ring of the bearing 7. The bearing 7 is used to support the transmission shaft 3 to ensure the stability of the transmission shaft 3 in the frame 4. The bearing 7 and the frame 4 both provide strong support for the transmission shaft 3 to ensure the stability of the transmission shaft 3 during operation, reduce mechanical vibration and eccentricity problems, and avoid the lateral force generated by the meshing of the gear 5 when the transmission shaft 3 rotates. The outer ring of the bearing 7 is used to offset the axial thrust, thereby preventing the transmission shaft 3 from axial slipping during operation, thereby improving the reliability of the test device under high load conditions.

[0057] Please refer to the attached Figure 4 In a preferred embodiment of the present invention, a mounting groove 11 is provided on the upper side of the bottom base 2, and the mounting groove 11 is used for convenient installation of the test vehicle. The positioning function of the mounting groove 11 ensures the alignment and installation operation of the test vehicle, thereby improving the reliability of the experimental results.

[0058] Please refer to the attached Figure 5 In a preferred embodiment of the present invention, the monitoring system comprises:

[0059] The temperature and humidity sensor modules are distributed above the test road surface 10 to monitor the temperature and humidity of the test road surface 10 in real time. Through high-precision, multi-point distributed temperature and humidity monitoring, it is ensured that the environmental conditions of the test road surface 10 can be grasped in real time, providing a reliable basis for subsequent adjustments;

[0060] The data acquisition module is connected to the temperature and humidity sensor modules to collect sensor signals and generate corresponding digital signals. The high-precision signal processing capability of the data acquisition module avoids interference from environmental noise and provides a guarantee for the accuracy of experimental data.

[0061] The central control module is connected to the data acquisition module for analyzing digital signals and generating environmental adjustment instructions. The central control module ensures that the environmental parameters of the test road surface 10 are always stable within the target range through closed-loop feedback control, thereby improving the repeatability and accuracy of the experiment;

[0062] The actuator, including a cold and hot control unit and a spraying unit, is connected to the central control module and is used to adjust the temperature and humidity of the test road surface 10 according to the environmental adjustment command. The actuator can quickly respond to the command of the central control module to achieve dynamic adjustment of the test environment and ensure the diversity and accuracy of the experimental conditions;

[0063] The display and communication module is connected to the central control module and is used to display the temperature, humidity status and adjustment parameters of the test road surface 10 in real time, and supports uploading the monitoring data to the remote terminal. The display and communication module enhances the visual operation capability and remote monitoring capability of the device, greatly improving the convenience and management efficiency of the experiment.

[0064] Please refer to the attached Figure 5 In a preferred embodiment of the present invention, the arrangement of the temperature and humidity sensor module includes:

[0065] According to the area of ​​the test road surface 10 and the monitoring accuracy requirements, multiple temperature and humidity sensors are evenly distributed to ensure that each area of ​​the test road surface 10 is within the monitoring range. The evenly distributed sensor layout ensures real-time monitoring of environmental parameters in each area of ​​the test road surface 10, improving the comprehensiveness and accuracy of the monitoring data;

[0066] The temperature and humidity data of 10 different locations on the test road surface are obtained through sensors, and distributed monitoring results are generated. Among them, the temperature sensor: a digital temperature sensor is selected, which has high sensitivity and low latency characteristics, and can quickly capture small changes in ambient temperature. Humidity sensor: an integrated relative humidity sensor is selected, which has a wide measurement range and is suitable for simulating a variety of humidity conditions. The use of high-performance sensors combined with scientific installation methods ensures the rapidity and stability of data acquisition and avoids measurement errors caused by installation problems.

[0067] Please refer to the attached Figure 5 In a preferred embodiment of the present invention, the work of the central control module includes:

[0068] Receive temperature and humidity monitoring data transmitted by the data acquisition module;

[0069] Analyze the monitoring data according to the test requirements and generate the average values ​​of temperature and humidity;

[0070] After receiving the data from the distributed sensors, the central control module needs to calculate the average temperature and humidity values ​​of the entire test road surface 10, the formula is:

[0071]

[0072] in:

[0073] T avg , RH avg T is the average temperature and humidity of the test road surface 10; i , RH i is the measured temperature and humidity of the i-th sensor; w i is the weight of the i-th sensor, defined as:

[0074]

[0075] Where (x i ,y i ) is the position coordinate of the i-th sensor, (x c ,y c ) is the coordinate of the center position of the road surface;

[0076] The temperature and humidity deviation is calculated using the following formula:

[0077] ΔT=T target -T avg ,ΔRH=RH target -RH avg

[0078] in:

[0079] T target , RH targetare the target temperature and humidity preset for the experiment respectively;

[0080] ΔT and ΔRH are the deviations between the current environmental parameters and the target values, respectively;

[0081] The adjustment command is generated according to the analysis results and transmitted to the actuator, where the formula for controlling the power output command of the heater or cooling unit is:

[0082]

[0083] in:

[0084] P heat ,P cool are the power outputs of the heater and cooling units respectively; K heat , K cool To adjust the gain factor, determine the adjustment speed and range;

[0085] The working time or frequency of the spraying unit is generated according to the humidity deviation, and the formula is:

[0086] Q spray =K spray ΔRH

[0087] in:

[0088] Q spray is the spray volume of the spraying unit (unit: L / min); K spray is the humidity adjustment gain coefficient;

[0089] The command is transmitted to the actuator via the CAN bus or wireless module, and the delay time τ delay It needs to be shortened as much as possible. The formula is:

[0090]

[0091] in:

[0092] L data is the length of the instruction data packet (unit: bit); R transmission The transmission rate of the communication interface (unit: bit / s) is provided by the central control module, which provides a mathematical basis for the precise adjustment of the test environment, ensuring the efficiency of the device operation and the reliability of the experimental results.

[0093] Please refer to the attached Figure 5 In a preferred embodiment of the present invention, the temperature and humidity adjustment of the actuator includes:

[0094] When the temperature of the test road surface 10 is lower than the target temperature, the cold and hot control unit is started to heat the test road surface 10;

[0095] When the humidity of the test road surface 10 is lower than the target humidity, the spraying unit is started to spray the test road surface 10;

[0096] The operating states of the hot and cold control unit and the spraying unit are adjusted according to the real-time monitoring results to keep the temperature and humidity of the test road surface 10 stable at the target values. The hot and cold control unit and the spraying unit can be controlled through the central control module, thereby reducing the test errors caused by temperature and humidity fluctuations, thereby improving the accuracy and repeatability of the automobile tire ABS performance test.

[0097] Working principle: First, the test vehicle is fixed on the test device through the bottom base 2 to ensure its stability during the test. Secondly, the output power of the motor 1 drives the transmission shaft 3 to be transmitted to the gear 5, and the gear 5 is meshed with the track rack 6, thereby pushing the test vehicle to move along the track rack 6. The different adhesion coefficients of the track rack 6 simulate a variety of road conditions. The test vehicle runs in different starting, acceleration, and braking modes to measure the ABS performance;

[0098] The movement phase includes: starting acceleration: the motor 1 drives the vehicle at a constant acceleration to gradually reach the speed required by the experiment; uniform speed movement: the vehicle keeps moving forward at a constant speed through the stable output of the motor 1; deceleration braking: the vehicle applies braking force, and the motor 1 adjusts the torque at the same time to make the vehicle decelerate quickly, so as to realize the test of ABS performance;

[0099] In addition, by monitoring the temperature and humidity of the test road surface 10 through the monitoring system, and controlling the operation of the cold and hot control unit and the spraying unit according to demand, it is possible to simulate a variety of environmental conditions and achieve a comprehensive test of the ABS performance of automobile tires.

[0100] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A test device for testing the ABS performance of automobile tires, characterized in that: include: A bottom base (2) for fixing the test vehicle; A frame (4) is arranged at the bottom of the bottom base (2) and is used to support the bottom base (2); An electric motor (1) is arranged in the middle of the frame (4), and both output ends of the electric motor (1) are fixedly connected to gears (5) via a transmission shaft (3) for assisting in driving the test vehicle to move; A plurality of test pavement surfaces (10) are arranged at the bottom of the frame (4); a track rack (6) is fixedly connected to the upper side of the test pavement surfaces (10); the gear (5) and the track rack (6) are meshed to enable the test vehicle to move along the track rack (6); the plurality of test pavement surfaces (10) are used to adjust the adhesion coefficient of the pavement during the test, so that the test device can more realistically simulate a diverse road environment; A cooling and heating control unit and a spraying unit, wherein the cooling and heating control unit and the spraying unit are both arranged outside the test road surface (10) and are used to adjust the temperature and humidity of the test road surface (10) to simulate tire performance under various environments; The monitoring system is used to monitor the temperature and humidity of the test road surface (10) so that the adjusted temperature and humidity reach the required range.

2. A test device for testing the ABS performance of automobile tires according to claim 1, characterized in that: A plurality of fixing frames (8) are installed in the middle of the frame (4), and the motor (1) is fixedly connected to one end of the fixing frame (8) away from the frame (4) for fixing the motor (1) and maintaining the stability of the motor (1) during operation.

3. A test device for testing the ABS performance of automobile tires according to claim 1, characterized in that: A threaded hole (9) is provided in the middle of the frame (4), and a through hole is provided in the middle of the bottom base (2). The through hole is used for the entry of a connecting bolt, and the threaded hole (9) is used for threaded connection with the connecting bolt to connect and fix the bottom base (2) and the frame (4).

4. A test device for testing the ABS performance of automobile tires according to claim 1, characterized in that: The transmission shaft (3) is fixedly connected to the gear (5) via a semicircular key, and the semicircular key is used to transmit the power output by the motor (1) to the gear (5).

5. A test device for testing the ABS performance of automobile tires according to claim 1, characterized in that: A bearing (7) is fixedly connected to the middle of the frame (4), and the transmission shaft (3) is fixedly connected to the inner ring of the bearing (7). The bearing (7) is used to support the transmission shaft (3) to ensure the stability of the rotation of the transmission shaft (3) in the frame (4).

6. A test device for testing the ABS performance of automobile tires according to claim 1, characterized in that: The upper side of the bottom base (2) is provided with a mounting groove (11), and the mounting groove (11) is used for conveniently mounting a fixture to fix the test vehicle.

7. A test device for testing the ABS performance of automobile tires according to claim 1, characterized in that: The monitoring system comprises: Temperature and humidity sensor modules are distributed above the test road surface (10) and are used to monitor the temperature and humidity of the test road surface (10) in real time; A data acquisition module, connected to the temperature and humidity sensor module, for collecting sensor signals and generating corresponding digital signals; A central control module, in communication with the data acquisition module, for analyzing the digital signal and generating an environment adjustment instruction; An actuator, including a cold and hot control unit and a spraying unit, connected to the central control module and used to adjust the temperature and humidity of the test road surface (10) according to the environmental adjustment instruction; The display and communication module is connected to the central control module and is used to display the temperature and humidity status and adjustment parameters of the test road surface (10) in real time, and supports uploading the monitoring data to a remote terminal.

8. A test device for testing the ABS performance of automobile tires according to claim 7, characterized in that: The arrangement of the temperature and humidity sensor module includes: According to the area of ​​the test road surface (10) and the monitoring accuracy requirements, multiple temperature and humidity sensors are evenly distributed to ensure that all areas of the test road surface are within the monitoring range; Temperature and humidity data at different locations on the test road surface (10) are acquired through temperature and humidity sensors, and distributed monitoring results are generated.

9. A test device for testing the ABS performance of automobile tires according to claim 8, characterized in that: The work of the central control module includes: Receiving the temperature and humidity monitoring data transmitted by the data acquisition module; Analyze the monitoring data in combination with the test requirements to generate average values ​​of temperature and humidity; An adjustment instruction is generated according to the analysis result and transmitted to the actuator.

10. A test device for testing the ABS performance of automobile tires according to claim 9, characterized in that: The temperature and humidity regulation of the actuator includes: When the temperature of the test road surface (10) is lower than the target temperature, the cold and hot control unit is started to heat the test road surface (10); When the humidity of the test road surface (10) is lower than the target humidity, the spraying unit is started to perform spraying adjustment on the test road surface (10); The operating states of the cooling and heating control unit and the spraying unit are adjusted according to the real-time monitoring results to keep the temperature and humidity of the test road surface (10) stable at the target values.

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