Airport pavement friction coefficient test vehicle

Abstract

The invention relates to the technical field of road surface monitoring, and discloses an airport road surface friction coefficient test vehicle, which comprises a trailer chassis, one side of the trailer chassis is provided with a trailer frame, both sides of the inner wall of the trailer frame are provided with placing boxes, both sides of the inner cavity of the trailer frame are provided with driving tires, and the driving tires are arranged in the trailer frame. A chain connecting system is arranged on a transmission rod connected with the two driving tires, a lifting system is installed on the top of the trailer frame and comprises an oil cylinder used for controlling the hinged testing tires to ascend and descend in an inner cavity of the trailer frame, one side of the chain connecting system is connected with the testing tires, and the other side of the chain connecting system is connected with the other side of the chain connecting system. The system is used for controlling and testing the tire slip rate through a chain connection system. The slip rate control between the test tire and the driving tire is realized through the chain connection system, and the slip rate is always kept in a range of 12-15%, so that the test result is more consistent.

Description

Technical Field

[0001] The invention relates to the technical field of road surface monitoring, in particular to an airport road surface friction coefficient testing vehicle. Background Art

[0002] The friction coefficient of the airport runway is one of the important parameters that affect the safety of aircraft take-off and landing and the service life of the runway. The anti-skid performance of the runway is directly related to the friction between the tires and the ground during the take-off and landing of the aircraft. Especially in slippery, rainy and snowy weather conditions, the reduction of the friction coefficient will increase the aircraft's taxiing distance, affect the braking effect, and thus increase safety risks. Therefore, regular testing of the runway's friction coefficient is of great significance to the safety management of airport operations.

[0003] Traditional friction coefficient testing equipment mainly relies on manual or semi-automatic operation, and it is usually difficult to achieve real-time and automated friction data collection. These devices have problems such as unstable slip rate control and insufficient data sampling accuracy during operation. Especially under slippery road conditions, the water film thickness of the sprinkler system is difficult to accurately control, resulting in poor accuracy and repeatability of test results. In addition, traditional equipment usually lacks efficient abnormality detection and alarm mechanisms. When the slip rate exceeds the standard or the friction data is abnormal during the test, the operator cannot be informed in time, posing a safety hazard.

[0004] To this end, those skilled in the art provide an airport pavement friction coefficient testing vehicle to solve the problems raised in the above background technology. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an airport pavement friction coefficient testing vehicle, which solves the problems of unstable slip rate control and insufficient data sampling accuracy during use of the prior art testing vehicles.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an airport road friction coefficient test vehicle, including a trailer chassis, a trailer frame is installed on one side of the trailer chassis, placement boxes are provided on both sides of the inner wall of the trailer frame, drive tires are installed on both sides of the inner cavity of the trailer frame, a chain connection system is provided on the transmission rod connected to the two drive tires, a lifting system is installed on the top of the trailer frame, the lifting system includes a cylinder for controlling the lifting of the articulated test tire in the inner cavity of the trailer frame, one side of the chain connection system is connected to the test tire, and is used to control the slip rate of the test tire through the chain connection system, a water tank is installed on one side of the trailer frame, a sprinkler system is installed at one end of the water tank, and is perpendicular to the test tire.

[0007] Preferably, a test system is installed inside the placement box to control each component to complete the road friction test, and the test system includes:

[0008] A water volume control module, used to form a water film between the test tire and the road surface;

[0009] Electrical control module, used to integrate and manage the operation of each module;

[0010] Friction test wheel module, used to directly contact the road surface and collect friction data;

[0011] Slip rate guarantee module, used to control the slip rate of the test tire;

[0012] The alarm and safety warning module is used to monitor abnormal conditions of equipment during operation.

[0013] Preferably, the slip rate guarantee module includes a chain connection system and a slip rate control sensor, the chain connection system controls the slip rate between the test tire and the drive tire by adjusting the transmission ratio, and the slip rate control sensor is used to detect the slip rate of the test tire in real time.

[0014] Preferably, the chain connection system of the slip ratio guarantee module realizes the adjustment of the slip ratio through a PID control algorithm, and the slip ratio range is controlled within a variation range of 12-15%.

[0015] Preferably, the sprinkler system comprises a water pump and a valve. The water pump is installed in the inner cavity of the water tank and is electrically connected to the water volume control module.

[0016] Preferably, the water volume control module automatically adjusts the water output of the sprinkler system according to the driving speed of the test vehicle, simulating a slippery road surface condition with a water film thickness of 0.5-1 mm.

[0017] Preferably, the alarm and safety warning module includes an abnormality detection module and an alarm module, the abnormality detection module is used to detect excessive slip rate, abnormal fluctuation of friction force and sensor failure, and the alarm module prompts the operator through sound and light alarms under abnormal conditions.

[0018] A computer device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the test system as claimed in any one of claims 2 to 7 when executing the computer program.

[0019] Working principle: The airport road friction coefficient test vehicle of the present invention drives the trailer chassis to travel through the traction equipment, and each module works together to achieve the measurement of the road friction coefficient. The driving tires are installed on both sides of the inner cavity of the trailer frame and connected to the test tires through a chain connection system. When the equipment is running on the runway, the chain connection system generates the slip rate between the test tire and the driving tire by adjusting the transmission ratio. The slip rate control sensor detects the slip rate in real time and feeds back to the slip rate guarantee module. The chain connection system is adjusted through the PID control algorithm to ensure that the slip rate is maintained within the range of 12-15% to meet the requirements of measuring the friction coefficient.

[0020] The lifting and lowering of the test tire is controlled by a lifting system installed on the top of the trailer frame. The lifting system includes a cylinder that is used to place the test tire on the road and contact the ground during testing, and lift it up when not in testing state to reduce tire wear. The lifting operation is regulated by the electrical control module to ensure stable pressure in the test tire.

[0021] The water volume control module controls the water output of the water sprinkler system through the water pump and valve in the water tank to form a water film between the test tire and the road surface. The water volume control module adjusts the water volume of the water sprinkler system according to the driving speed of the equipment to keep the water film thickness within the range of 0.5-1mm, simulating slippery road conditions and ensuring the standardization of friction coefficient measurement.

[0022] The test tire is in direct contact with the road surface and collects friction data through the friction test wheel module. The friction sensor is installed on the test tire and feeds the measured friction data back to the electrical control module for friction coefficient calculation.

[0023] The alarm and safety warning module includes an abnormal detection module and an alarm module. The abnormal detection module is used to detect abnormal conditions of slip rate and friction, such as excessive slip rate or abnormal friction fluctuation. When an abnormal situation is detected, the alarm module reminds the operator through sound and light alarm to ensure the safe operation of the equipment.

[0024] The present invention provides an airport road friction coefficient testing vehicle, which has the following beneficial effects:

[0025] 1. The present invention realizes the slip rate control between the test tire and the driving tire through the chain connection system, ensuring that the slip rate is always kept within the range of 12-15%, making the test results more consistent.

[0026] 2. The water volume control module integrated in the test vehicle of the present invention can automatically adjust the water output of the sprinkler system according to the driving speed to form a standardized water film thickness, thereby accurately simulating slippery road conditions and is suitable for both dry and wet friction tests. In addition, the test mode of multiple speed conditions further enhances the adaptability of the equipment in different runway environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a plan view schematic diagram of the present invention;

[0028] Figure 2 It is a side view structural schematic diagram of the present invention;

[0029] Figure 3 Schematic diagram of the system framework of the present invention.

[0030] Among them, 1. trailer frame; 2. test tire; 3. drive tire; 4. chain connection system; 5. water tank; 6. lifting system; 7. trailer chassis; 8. sprinkler system; 9. placement box. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings 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.

[0032] Embodiment 1:

[0033] Please see attached Figure 1 -Attached Figure 2 The embodiment of the present invention provides an airport road friction coefficient test vehicle, including a trailer chassis 7, a trailer frame 1 is installed on one side of the trailer chassis 7, and placement boxes 9 are arranged on both sides of the inner wall of the trailer frame 1, and driving tires 3 are installed on both sides of the inner cavity of the trailer frame 1. A chain connection system 4 is arranged on the transmission rod connected to the two driving tires 3. A lifting system 6 is installed on the top of the trailer frame 1, and the lifting system 6 includes a cylinder for controlling the lifting of the hinged test tire 2 in the inner cavity of the trailer frame 1. One side of the chain connection system 4 is connected to the test tire 2, and is used to control the slip rate of the test tire 2 through the chain connection system 4. A water tank 5 is installed on one side of the trailer frame 1, and one end of the water tank 5 is installed on the sprinkler system 8 and is perpendicular to the test tire 2.

[0034] Specifically, the trailer chassis 7 is used to connect the tractor and provide a stable mobile platform for the entire test equipment. A trailer frame 1 is installed on one side of the trailer chassis 7, and the trailer frame 1 is fixed to the trailer chassis 7 by a fastening structure to ensure that the frame remains stable when the equipment is driving. Placement boxes 9 are set on both sides of the inner wall of the trailer frame 1 for installing and protecting the core control system and test system components of the equipment. The placement box 9 is fixed to the inner wall of the trailer frame 1 by bolts or welding to ensure the safety of the components under vibration and impact environments.

[0035] Driving tires 3 are installed on both sides of the inner cavity of the trailer frame 1. The driving tires 3 are installed on fixed brackets on both sides of the inner cavity of the frame through bearing devices. The transmission structure of the driving tires 3 is connected to the power system of the tractor, so that the driving tires 3 drive the test vehicle forward as a whole when driving.

[0036] A chain connection system 4 is provided on the transmission rod connected to the two driving tires 3, and the chain connection system 4 realizes the slip rate control between the driving tire 3 and the test tire 2 by adjusting the transmission ratio. One end of the chain connection system 4 is connected to the transmission rod of the driving tire 3, and the other end is connected to the transmission shaft of the test tire 2, so that the power of the driving tire 3 is transmitted to the test tire 2 through the chain, ensuring that the required slip rate is maintained during the contact between the test tire 2 and the ground.

[0037] A lifting system 6 is installed on the top of the trailer frame 1, and the lifting system 6 is fixedly connected to the top of the trailer frame 1 through a set of support frames. The core component of the lifting system 6 is a cylinder, and the telescopic end of the cylinder is connected to the bracket of the test tire 2 through a hinge structure. The working stroke of the cylinder controls the lifting action of the test tire 2; when the cylinder is working, the test tire 2 can smoothly descend from a suspended state in a non-test state to a test state in contact with the ground, thereby achieving stable contact with the road surface, so as to provide continuous friction data during the test process.

[0038] One side of the chain connection system 4 is connected to the test tire 2, and the slip rate of the test tire 2 during operation is controlled by chain transmission to ensure that the slip rate of the test tire 2 is within a predetermined range under different speed conditions.

[0039] A water tank 5 is installed on one side of the trailer frame 1. The water tank 5 is fixed to the side of the frame through a supporting structure. A wave-proof baffle is arranged inside the water tank 5 to reduce the impact of water sloshing on the system during the driving of the test vehicle. One end of the water tank 5 is connected to a sprinkler system 8. The sprinkler system 8 includes a water pump and a multi-channel control valve. The water pump is installed on the water tank 5. The water outlet of the water pump is connected to the multi-channel control valve through a pipeline. The water outlet of the multi-channel control valve is connected to a sprinkler nozzle.

[0040] The sprinkler system 8 is arranged vertically to the test tire 2. The water supply of the water pump is adjusted according to the driving speed of the test vehicle through the water volume control module to ensure that a water film with a thickness of 0.5 to 1 mm is always maintained between the test tire 2 and the road surface, thereby meeting the requirements of the friction coefficient test under different wet and slippery road conditions.

[0041] Please see attached Figure 3 A test system is installed inside the placement box 9 to control each component to complete the road friction test. The test system includes:

[0042] The water volume control module is used to form a water film between the test tire 2 and the road surface; the watering system 8 includes a water pump and a valve, and the water pump is installed in the inner cavity of the water tank 5 and is electrically connected to the water volume control module. The water volume control module automatically adjusts the water output of the watering system 8 according to the driving speed of the test vehicle, and the simulated slippery road condition is a water film thickness of 0.5-1mm.

[0043] Specifically, a test system is installed inside the placement box 9, and the test system is used to integrate and control the operation of various components to ensure that the test vehicle can complete accurate road friction coefficient measurement under different conditions. The test system includes multiple functional modules, among which the water volume control module is one of the key components, which is specifically used to regulate the formation of a water film between the test tire 2 and the road surface to simulate slippery road test conditions. The water volume control module controls the water pump and valve of the sprinkler system 8 through electrical connection, ensuring that the water pump can extract water from the water tank 5 and adjust the flow rate through the control valve, injecting an appropriate amount of water into the sprinkler nozzle, and finally forming a uniform water film between the test tire 2 and the ground.

[0044] The water pump of the sprinkler system 8 is installed in the inner cavity of the water tank 5 and is fixed in an anti-vibration manner to reduce the impact of vibration on the water supply system during driving. The water volume control module has speed sensing and automatic adjustment functions, which can monitor the driving speed of the test vehicle in real time and automatically adjust the water output of the sprinkler system 8 according to the speed change to ensure that the water film thickness is maintained within the range of 0.5-1 mm at different vehicle speeds.

[0045] This water film thickness control can not only fully simulate wet and slippery road conditions to ensure the standardization and consistency of friction coefficient measurement, but also avoid test deviations caused by water film thickness being too thin or too thick, thereby providing accurate anti-skid performance data support for airport pavements.

[0046] Electrical control module, used to integrate and manage the operation of each module;

[0047] Specifically, the module includes a central processing unit (CPU), an input and output interface (I / O interface), a data acquisition unit and a communication module to achieve multi-module collaborative operation and real-time data processing. The central processing unit manages the various functions of the test vehicle through a programmed logic control (PLC), including the operation of the lifting system 6 slip rate guarantee module, the water volume control module, and the alarm and safety warning module. The electrical control module receives data from sensors such as friction sensors, slip rate sensors, and speed sensors through the I / O interface, and collects and processes the friction coefficient, slip rate, and water film thickness information generated during the test in real time.

[0048] The data acquisition unit samples the sensor data at high frequency and reduces noise interference through filtering algorithms to ensure data accuracy. The communication module uses a high-speed data bus (such as CAN or RS485) to achieve data transmission between modules, ensuring rapid system response and stable control. The central processing unit of the electrical control module also includes a PID control algorithm, which controls the slip rate of the test tire 2 by adjusting the transmission ratio of the slip rate guarantee module to ensure that the slip rate remains within the target range of 12-15% during the test.

[0049] At the same time, the electrical control module also accurately manages the adjustment instructions of the water volume control module, so that the sprinkler system 8 test vehicle can stably control the water output at different speeds to ensure that the water film thickness meets the test standards. The electrical control module also integrates data storage functions to record friction data, slip rate and other important parameters during the test for subsequent analysis and reference. Through the comprehensive integration and real-time management of various modules, this module enables the test vehicle to operate reliably and stably on various road surfaces and test conditions, and generates accurate road friction coefficient data, providing important support for the evaluation of the anti-skid performance of airport roads.

[0050] Friction test wheel module, used to directly contact the road surface and collect friction data;

[0051] Specifically, the slip ratio guarantee module is used to control the slip ratio of the test tire 2; the slip ratio guarantee module includes a chain connection system 4 and a slip ratio control sensor, the chain connection system 4 controls the slip ratio between the test tire 2 and the drive tire 3 by adjusting the transmission ratio, and the slip ratio control sensor is used to detect the slip ratio of the test tire 2 in real time. The chain connection system 4 of the slip ratio guarantee module adjusts the slip ratio through the PID control algorithm, and the slip ratio range is controlled within a variation of 12-15%.

[0052] Specifically, the friction test wheel module is the core component of the test vehicle to measure the friction coefficient. It is specifically used to directly contact the road surface and accurately collect friction data to evaluate the anti-skid performance of the road surface. The module includes structural elements such as a test tire 2, a friction sensor, and a connecting bracket. The test tire 2 meets the test standards of the International Civil Aviation Organization (ICAO) and the Federal Aviation Administration (FAA). The material is wear-resistant and the air pressure is set to 0.207MPa to ensure stable friction characteristics under different temperature and humidity conditions. The test tire 2 is installed inside the trailer frame 1 and is connected to the tire 3 through a chain connection system 4, so that it contacts the road surface at a set slip rate, thereby simulating the actual slip of the aircraft on the runway.

[0053] The friction sensor is tightly mounted on the bearing bracket of the test tire 2 and is used to monitor the friction between the test tire 2 and the road surface in real time. The sensor usually adopts a high-precision strain gauge or piezoelectric sensor with temperature compensation function, which can adapt to the operation requirements of the test vehicle under different temperature conditions on the airport runway. The friction data is collected by the sensor and transmitted to the electrical control module. The data acquisition unit will perform high-frequency sampling to ensure the continuity and accuracy of the friction signal. The sensor signal is filtered and denoised by the electrical control module to obtain stable friction coefficient data, which provides a reliable basis for the analysis of the anti-skid performance of the road surface.

[0054] During the test, the friction test wheel module maintains a slip rate of 12-15% according to the adjustment of the slip rate guarantee module, ensuring that the test tire 2 generates stable friction while in contact with the road surface. The precision design of this module can maintain measurement consistency under different speed conditions (such as 65 km / h and 96 km / h). The installation position of the friction test wheel module is optimized to ensure that the contact surface and force of the test tire 2 are uniform, thereby improving the reliability of the friction data. After completing the test, the module lifts the test tire 2 off the road surface through the lifting system 6 cylinders to reduce tire wear in the non-test state. Through the structural design of the friction test wheel module and high-precision friction acquisition, the test vehicle can provide accurate data support for the friction coefficient measurement of the airport runway, which helps the airport management department to analyze the anti-skid performance and make maintenance decisions of the runway.

[0055] The alarm and safety warning module is used to monitor the abnormal state of the equipment during operation. The alarm and safety warning module includes an abnormal detection module and an alarm module. The abnormal detection module is used to detect excessive slip rate, abnormal friction fluctuations and sensor failures. The alarm module prompts the operator through sound and light alarms in abnormal states.

[0056] Specifically, the core function of the abnormality detection module is to monitor the key parameters of the test vehicle in real time, including slip rate, friction value and the operating status of the sensor. The slip rate monitoring function is used to detect whether the slip rate of the test tire 2 exceeds the set range of 12-15%. Through the data connection with the slip rate control sensor, once the slip rate is detected to be too high or too low, the abnormality detection module immediately identifies and marks the state. At the same time, friction monitoring is used to detect the fluctuation of friction between the test tire 2 and the road surface. If the friction data fluctuates abnormally or exceeds the normal range, the abnormality detection module will judge it as abnormal friction. In addition, the abnormality detection module also has a sensor fault detection function, which is used to check the working status of friction sensors, slip rate sensors and other sensors in real time, identify data transmission abnormalities or sensor failures, and promptly warn of possible problems with the equipment.

[0057] The alarm module is used to issue an audible and visual alarm to the operator in an abnormal state. This module is connected to the abnormal detection module. When an abnormal situation such as excessive slip rate, abnormal friction fluctuation or sensor failure is detected, the alarm module will issue an alarm through the speaker and warning light, and simultaneously remind the operator of the existence of the abnormal situation in the form of sound and light. The dual prompting method of sound and light alarm can effectively attract the attention of the operator, so that he can take necessary countermeasures in the first time. The intensity of the sound and light alarm of the alarm module is adjustable to meet the operation requirements in different noise environments.

[0058] The alarm and safety warning module continuously monitors the key parameters during the test, realizes multiple monitoring of slip rate, friction and sensor status, and promptly warns the operator when abnormal conditions are found. The introduction of this module not only improves the operating safety of the equipment in the complex airport runway environment, but also provides an effective means for real-time intervention during the test process, ensuring that the test vehicle can quickly respond, shut down or adjust in the event of an abnormality, thereby ensuring the reliability of the data and the long-term stable operation of the equipment.

[0059] Embodiment 2

[0060] The second embodiment of the present invention is based on the same inventive concept and proposes a computer-readable storage medium. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, the steps of the test system of the above embodiment are implemented.

[0061] Embodiment 3

[0062] The third embodiment of the present invention is based on the same inventive concept and proposes a terminal, which includes: a processor and a memory; the processor and the memory communicate with each other; the memory is used to store instructions; the processor is used to execute the instructions in the memory to execute the test system of the above embodiment.

[0063] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0064] Embodiment 4: Test mode embodiment

[0065] The friction coefficient test vehicle of the present invention is based on the first embodiment, supports friction resistance test at two speeds, and can select dry and wet friction test modes according to different test requirements. The specific implementation process is as follows:

[0066] Test Example 1: Dry Friction Test at 65 km / h

[0067] In the dry friction test mode, the sprinkler system 8 is turned off and the test vehicle runs at a speed of 65 km / h. This mode does not use the water volume control module, and the test tire 2 directly contacts the runway on a road surface without a water film. During the test, the drive tire 3 drives the test tire 2 to run at a slip rate of 12-15%, and the friction sensor collects the friction data between the test tire 2 and the runway and feeds it back to the electrical control module. The test system completes the runway friction coefficient measurement under dry friction conditions based on the friction and slip rate data collected in real time.

[0068] Test Example 2: Wet Friction Test at 65 km / h

[0069] In the wet friction test mode, the water volume control module is started to control the water output of the sprinkler system 8 to ensure that the water film thickness is 0.5-1 mm. The test vehicle is driven at a speed of 65 km / h, and the test tire 2 contacts the runway under the water film condition. The slip rate is controlled at 12-15% by the slip rate guarantee module. The friction sensor collects wet friction data and feeds it back to the electrical control module. The wet friction test is used to evaluate the anti-skid performance of the runway in a wet and slippery state.

[0070] Test Example 3: Dry Friction Test at 96 km / h

[0071] In the dry friction test mode, the sprinkler system 8 is turned off and the test vehicle is running at a speed of 96 km / h. Due to the high speed, the electrical control module makes a more precise PID adjustment to the slip rate guarantee module to keep the slip rate at 12-15%. The test tire 2 is in direct contact with the dry road surface, and the friction sensor collects friction data to complete the friction coefficient test under high-speed dry friction conditions.

[0072] Test Example 4: Wet Friction Test at 96 km / h

[0073] In the wet friction test mode, the water volume control module is started and the watering system 8 is adjusted to ensure that the water film thickness is 0.5-1 mm. The test vehicle is driven at a speed of 96 km / h, and the slip rate between the drive tire 3 and the test tire 2 is maintained at 12-15%. The friction sensor collects wet friction data in real time, and the data is transmitted to the electrical control module for processing. This mode is used to test the anti-skid performance of the runway in a wet and slippery state and at high speed.

[0074] 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. Airport road friction coefficient test vehicle, characterized by: The invention comprises a trailer chassis (7), a trailer frame (1) is installed on one side of the trailer chassis (7), a placement box (9) is arranged on both sides of the inner wall of the trailer frame (1), a driving tire (3) is installed on both sides of the inner cavity of the trailer frame (1), a chain connection system (4) is arranged on the transmission rod connected to the two driving tires (3), a lifting system (6) is installed on the top of the trailer frame (1), the lifting system (6) comprises an oil cylinder, which is used to control the lifting of the hinged test tire (2) in the inner cavity of the trailer frame (1), one side of the chain connection system (4) is connected to the test tire (2), and is used to control the slip rate of the test tire (2) through the chain connection system (4), and a water tank (5) is installed on one side of the trailer frame (1), and a sprinkler system (8) is installed at one end of the water tank (5) and is perpendicular to the test tire (2).

2. The airport road friction coefficient testing vehicle according to claim 1, characterized in that: A test system is installed inside the placement box (9) for controlling each component to complete the road friction test. The test system includes: A water volume control module, used for forming a water film between the test tire (2) and the road surface; Electrical control module, used to integrate and manage the operation of each module; Friction test wheel module, used to directly contact the road surface and collect friction data; Slip rate guarantee module, used to control the slip rate of the test tire; The alarm and safety warning module is used to monitor abnormal conditions of equipment during operation.

3. The airport road friction coefficient testing vehicle according to claim 2, characterized in that: The slip rate guarantee module comprises a chain connection system (4) and a slip rate control sensor. The chain connection system (4) controls the slip rate between the test tire (2) and the drive tire (3) by adjusting the transmission ratio. The slip rate control sensor is used to detect the slip rate of the test tire (2) in real time.

4. The airport road friction coefficient testing vehicle according to claim 2, characterized in that: The chain connection system (4) of the slip ratio guarantee module realizes the adjustment of the slip ratio through a PID control algorithm, and the slip ratio range is controlled within a variation range of 12-15%.

5. The airport road friction coefficient testing vehicle according to claim 1, characterized in that: The watering system (8) comprises a water pump and a valve. The water pump is installed in the inner cavity of the water tank (5) and is electrically connected to the water volume control module.

6. The airport road friction coefficient testing vehicle according to claim 2, characterized in that: The water volume control module automatically adjusts the water output of the water sprinkling system (8) according to the driving speed of the test vehicle, simulating a slippery road surface condition with a water film thickness of 0.5-1 mm.

7. The airport road friction coefficient testing vehicle according to claim 2, characterized in that: The alarm and safety warning module includes an abnormality detection module and an alarm module. The abnormality detection module is used to detect excessive slip rate, abnormal fluctuation of friction force and sensor failure. The alarm module prompts the operator through sound and light alarms in abnormal conditions.

8. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the test system according to any one of claims 2 to 7 is implemented.

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