Environment simulation system for airfield pavement single-wheel wheel point instrument and wheel pressure calibration method

Abstract

The invention discloses an environment simulation system and a wheel pressure calibration method for an airport pavement single-wheel track instrument, and the system comprises a case housing located at the outer side of the track instrument, and the middle part in the case housing is provided with four limiting frames which are vertically distributed. The four limiting frames are evenly distributed at the four corners of the wheel switch instrument and fixedly connected with a rack of the wheel switch instrument, a bearing steel plate is jointly installed among the multiple limiting frames, and a pressure-sensitive sensor is installed on the bearing steel plate. The high-precision pressure-sensitive sensor is used for recording the contact area of the wheel track instrument and the pressure-sensitive sensor in real time, the dynamic pressure process and the pressure intensity value are calculated, the controller corrects the applied pressure of the wheel track instrument in time according to the result reflected on the controller by the data result, a traditional printing and dyeing paper and pressure-sensitive paper measuring method is replaced, and the measurement accuracy is improved. When movement deviation or speed change occurs, the movement deviation or the speed change can be timely reflected to the controller so as to adjust the movement track, the torque and the range of the wheel track instrument, and the accuracy of the movement process of the wheel track instrument is effectively guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of wheel rolling test, and in particular relates to an environment simulation system for a single-wheel wheel track meter on an airport pavement and a wheel pressure calibration method. Background Art

[0002] The pavement of civil aviation airports is usually constructed in the form of concrete. After being used under high load at the airport, various pavement diseases will gradually appear as the service life increases. For example, cracks, fissures, fractures, broken corners, edge drop, and corner drop. Although these diseases are diverse in form and have complex causes, rutting disease is a common quality problem that endangers the pavement of civil aviation airports. Analyzing the causes of its formation is of great significance to extending the service life of airport pavements and maintaining operational safety.

[0003] Rutting test is a commonly used method to test the quality of pavement, which is used to simulate the mechanical behavior of materials under actual load. However, the traditional rutting test machine is mainly used to evaluate the anti-rutting ability of asphalt mixture under simulated road traffic conditions. However, due to the unique characteristics and usage requirements of airport roads, the chassis temperature, temperature control protection, and average speed detection of traditional rutting test machines are not fully applicable to high-standard tests. There are also the following technical problems:

[0004] (1) Traditional wheel trackers lack safety protection and require a certain safety distance. They cannot continuously monitor the development and changes of the specimen during rolling. As a result, some wheel track equipment cannot be adjusted in time due to bearing offset, causing the rolling track to change.

[0005] (2) The wheel pressure of conventional wheel trackers is small, and the load-bearing capacity of the load-bearing frame is limited, which cannot meet the requirements of simulating actual wheel loads;

[0006] (3) Due to the substandard material of the wheel track gauge or the long service life, the pressure on the wheel track plate specimen is uneven and the pressure area increases, which leads to a decrease in the actual pressure and a great heterogeneity in the research results. In addition, the calibration method for wheel track pressure in the prior art is mostly printing and dyeing paper detection, which has a large distortion and cannot accurately and real-time reflect the actual pressure changes of the instrument.

[0007] Therefore, it is necessary to invent an environment simulation system and a wheel pressure calibration method for a single-wheel wheel track meter on an airport pavement. Summary of the invention

[0008] Technical problems to be solved: In view of the above technical problems, the present invention provides an environmental simulation system for a single-wheel wheel track meter for an airport pavement, so as to overcome the technical defects actually existing in use as mentioned in the background technology.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] An environmental simulation system for a single-wheel wheel track meter on an airport pavement comprises a chassis shell located outside the wheel track meter, wherein four vertically distributed limit frames are arranged in the middle of the chassis shell, and the four limit frames are evenly distributed at the four corners of the wheel track meter and fixedly connected to the frame of the wheel track meter, and a load-bearing steel plate is installed between the plurality of limit frames, and a pressure-sensitive sensor is installed on the load-bearing steel plate for sensing the wheel rolling test pressure of the wheel track meter in the vertical direction;

[0011] A temperature control mechanism is provided in the chassis shell, and the temperature control mechanism includes an electric heater and an air-cooled radiator, the electric heater and the air-cooled radiator are respectively located in the inner cavity of the chassis shell and on the side wall of the chassis shell, a temperature sensor is installed in the chassis shell for sensing the temperature in the chassis shell, a monitoring probe and a safety indicator light are also installed in the chassis shell, the safety indicator light sends a prompt signal when the temperature in the chassis shell is abnormal, and the monitoring probe is used to monitor the movement trajectory and movement speed of the wheel track meter;

[0012] A control panel is arranged outside the chassis shell, and a connection end of the control panel is electrically connected to a controller, and a connection end of the controller is electrically connected to an emergency stop button for emergency cutting off the working circuit of the wheel track meter;

[0013] The input end and output end of the controller are electrically connected to an A / D converter and a D / A converter respectively; the temperature sensor, pressure sensitive sensor and monitoring probe are electrically connected to the A / D converter; the electric heater, air-cooled radiator, wheel track meter and safety indicator light are electrically connected to the D / A converter; various results and control parameters are displayed and changed in real time through the control panel.

[0014] Preferably, a power supply is installed on the chassis shell, and the electric heater, control panel, temperature sensor, air-cooled radiator, pressure-sensitive sensor, wheel track meter, monitoring probe and safety indicator light are all electrically connected to the power supply.

[0015] Preferably, a vertically distributed partition steel plate is tightly fitted between the front and rear walls on the inner side of the chassis shell, and the interior of the chassis shell is divided into an experimental bin and a storage bin. The partition steel plate is fixedly connected to two adjacent limit frames, and a plurality of evenly distributed holes are opened on the surface of the partition steel plate, and the holes connect the experimental bin and the storage bin.

[0016] Preferably, the load-bearing steel plate is arranged horizontally, and the working surface of the pressure-sensitive sensor is horizontally embedded in the inner side of the load-bearing steel plate, and the surface of the chassis shell is sprayed with insulating paint;

[0017] The load-bearing steel plate is provided with a plurality of evenly distributed small holes.

[0018] Preferably, the load-bearing steel plate and the limiting frame are detachably connected by bolts, and anti-slip nails are provided at the installation positions of the load-bearing steel plate and the limiting frame for auxiliary fixation and position adjustment of the load-bearing steel plate and the limiting frame.

[0019] Preferably, a swing door is hingedly connected to one side of the chassis shell located in the storage bin, and a storage rack is provided in the storage bin for storing test pieces for experiments.

[0020] Preferably, a material changing door panel is hingedly connected to one side of the chassis shell located at the experimental chamber, and a transparent glass window is arranged on the material changing door panel.

[0021] Preferably, the bottom of the chassis shell is movably connected to two drawers, and the two drawers are respectively arranged below the experimental compartment and the storage compartment.

[0022] Preferably, a plurality of evenly distributed support frames are fixedly connected to the bottom of the chassis shell, and the top of the support frame located directly below the limiting frame penetrates the chassis shell and the load-bearing steel plate and is fixedly connected to the support frame.

[0023] A wheel pressure calibration method for a single-wheel wheel tracker on an airport pavement is based on an environment simulation system for a single-wheel wheel tracker on an airport pavement. The calibration method comprises the following steps:

[0024] S1. Place the test piece on the load-bearing steel plate and fix it, connect the wheel track meter to the power supply, and turn on the electrical components in the system;

[0025] S2. Input the preset wheel pressure value on the control panel according to the actual measurement requirements. At the same time, ensure that the temperature sensor, electric heater, air-cooled radiator, pressure-sensitive sensor, monitoring probe and safety indicator light are all in normal working condition;

[0026] S3, turn on the electric heater to gradually raise the internal temperature of the chassis shell to the preset test temperature. During this process, monitor the temperature change inside the chassis shell in real time to keep the temperature within the set range. If the temperature exceeds the safe range, the controller will automatically start the safety indicator light and the air cooling radiator and sound an alarm;

[0027] S4. After the temperature inside the chassis shell is stable, start the wheel track meter and make the rolling wheel of the wheel track meter run at the set movement speed. At this time, the pressure sensitive sensor starts to monitor and record the contact area in real time, digitize and graph the pressure distribution, calculate the actual pressure of the test piece according to the calibration data, and refine the fitting data;

[0028] S5. Observe the reaction result after pressure detection correction through the control panel. If it is found that the pressure value deviates from the preset value, calibrate it by adjusting the parameters in the controller until the pressure value stabilizes within the preset range.

[0029] S6. After the calibration is completed, the wheel rutting test is started and the entire calibration process is recorded and archived.

[0030] Preferably, the deviation identification and parameter calibration process in S5 is specifically as follows:

[0031] A permissible error threshold a of the pressure is set, the pressure-sensitive sensor (19) converts the detected pressure and contact area into an electrical signal, and converts it into a digital signal through an A / D converter, and compares the real-time measured pressure value with the preset wheel pressure value of the wheel track meter inside the chassis shell. If the measured value exceeds the range of the preset value ±a, it is considered that there is a deviation, otherwise it is considered that there is no deviation;

[0032] When there is a deviation, the closed-loop control system of the wheel track meter (15) is used to automatically adjust the applied pressure through the following pressure correction formula until the pressure value returns to the preset range;

[0033] F new =F desired ×A desired / A current

[0034] In the formula, F new is the corrected wheel pressure, F desired A is the preset wheel pressure of the wheel track gauge inside the chassis shell. desired A is the preset wheel pressure of the wheel track gauge inside the chassis shell. current It is the current wheel pressure detected by the pressure-sensitive sensor.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] 1. The contact area between the wheel track meter and the pressure sensitive sensor is recorded in real time through a high-precision pressure sensitive sensor, and the dynamic pressure process and pressure value are calculated. The controller is reflected in the controller according to the data results so that the controller can correct the applied pressure of the wheel track meter in time, replacing the measurement method of traditional printing and dyeing paper and pressure-sensitive paper;

[0037] 2. By installing transparent tempered organic glass and high temperature resistant monitoring probe on the outside of the chassis shell, the changes of the test piece and the internal working conditions can be observed in real time. When movement deviation or speed change occurs, it can be promptly responded to the controller to adjust the movement trajectory, torque and range of the wheel track meter, effectively ensuring the accuracy of the wheel track meter movement process;

[0038] 3. The internal temperature, load parameters and movement speed of the chassis are adjusted through the control panel and the controller. The data detected by the monitoring probe and pressure-sensitive sensor are reflected in real time, which is convenient for observing and adjusting various parameters, realizing the automation and precise control of the wheel rolling test; the safety indicator light is used to remind when the internal temperature exceeds the expected error range, meeting the requirements of the simulated wheel load experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A three-dimensional diagram of the overall structure (perspective effect) of the environment simulation system provided by the present invention;

[0040] Figure 2 A stereoscopic diagram of the overall structure of the environment simulation system provided by the present invention from an external perspective;

[0041] Figure 3 A front view of the overall structure of the environment simulation system provided by the present invention;

[0042] Figure 4 A side view of the overall structure of the environment simulation system provided by the present invention;

[0043] Figure 5 A schematic diagram of the internal structure of the environment simulation system provided by the present invention;

[0044] Figure 6 A control flow chart of the environment simulation system provided by the present invention;

[0045] Figure 7 It is a flow chart of the wheel pressure calibration method of the wheel track meter in the present invention;

[0046] Figure 8 This is a deviation judgment logic diagram in the present invention.

[0047] In the figure:

[0048] 1. Chassis shell; 2. Load-bearing steel plate; 3. Hinged door; 4. Partition steel plate; 5. Emergency stop button; 6. Controller; 7. Material change door panel; 8. Limit frame; 9. Drawer; 10. Safety indicator light; 11. Electric heater; 12. Support frame; 13. Bolts; 14. Monitoring probe; 15. Wheel track meter; 16. Control panel; 17. Power supply; 18. Temperature sensor; 19. Pressure sensitive sensor; 20. Air-cooled radiator. DETAILED DESCRIPTION

[0049] In conjunction with the drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention are clearly and completely described. 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.

[0050] like Figure 1-8As shown, an environmental simulation system for a single-wheel wheel track meter for an airport pavement comprises a chassis shell 1 located outside the wheel track meter 15, four vertically distributed limit frames 8 are arranged in the middle of the chassis shell 1, and the four limit frames 8 are evenly distributed at the four corners of the wheel track meter 15 and fixedly connected to the frame of the wheel track meter 15, a load-bearing steel plate 2 is installed between the plurality of limit frames 8, and a pressure-sensitive sensor 19 is installed on the load-bearing steel plate 2 for sensing the wheel rolling test pressure of the wheel track meter 15 in the vertical direction;

[0051] The pressure-sensitive sensor 19 includes a conductive layer, a grid plate, a printed material layer, an insulating layer and an inner adhesive material, and its measuring points are dense (up to 2000 points / cm 2 ), thin and light (thickness 0.2mm), high real-time performance (20us), strong flexibility, good waterproofness, and high temperature resistance of 100℃. The testable range is 0~30KPa, 20mm~300mm, and the accuracy error is less than 0.5%;

[0052] A temperature control mechanism is provided in the chassis shell 1, and the temperature control mechanism includes an electric heater 11 and an air-cooled radiator 20, the electric heater 11 and the air-cooled radiator 20 are respectively located in the inner cavity of the chassis shell 1 and on the side wall of the chassis shell 1, a temperature sensor 18 is installed in the chassis shell 1, and the number of the temperature sensors 18 is set to be multiple, which is used to monitor the temperature change inside the chassis shell 1 in real time, and a monitoring probe 14 and a safety indicator light 10 are also installed in the chassis shell 1, the safety indicator light 10 sends a prompt signal when the temperature in the chassis shell 1 is abnormal, and the monitoring probe 14 is used to monitor the movement trajectory and movement speed of the wheel track meter 15;

[0053] The frame composed of the limit frame 8 and the load-bearing steel plate 2 with holes can bear a load pressure of >3.0Mpa, and the internal temperature of the chassis shell 1 can be adjusted arbitrarily between 0-80°C;

[0054] A control panel 16 is provided on the outside of the chassis housing 1, and a connection end of the control panel 16 is electrically connected to a controller 6, and a connection end of the controller 6 is electrically connected to an emergency stop button 5, which is used to urgently cut off the working circuit of the wheel track meter 15. Once the operator finds an abnormal situation, the emergency stop button 5 can be immediately pressed to stop the wheel track meter 15 from running immediately, thereby ensuring the safety of the operator and the equipment;

[0055] In order to further improve the convenience and safety of the system, the control panel 16 is designed as a touch screen. Users can operate through an intuitive graphical interface to set rolling path, speed, temperature and load parameters. The control panel 16 also has a fault diagnosis function that can display the system operation status and potential problems, so that maintenance personnel can find and solve problems in a timely manner;

[0056] The input end and output end of the controller 6 are electrically connected to an A / D converter and a D / A converter respectively. The temperature sensor 18, the pressure sensitive sensor 19 and the monitoring probe 14 are all electrically connected to the A / D converter. The electric heater 11, the air-cooled radiator 20, the wheel track meter 15 and the safety indicator light 10 are all electrically connected to the D / A converter. The control panel 16 is used to display and change various results and control parameters in real time. According to the rolling path and speed requirements preset on the control panel 16, the wheel track meter 15 is controlled to operate;

[0057] After completing the pressure calibration, the test piece is fixed on the load-bearing steel plate 2, and the wheel track meter 1515 is started through the control panel 16 to reciprocate in the horizontal direction according to the preset conditions to achieve a variety of actual scene simulation effects. During the experiment, the movement trajectory and movement speed of the wheel track meter 15 are observed through the material change door panel 77 and the monitoring probe 14, and fed back to the controller 6 for timely adjustment. After the experiment, the results displayed in the control panel 16, such as speed, load, temperature, and duration, can be used to analyze various values ​​and archive them.

[0058] Specifically, a power supply 17 is installed on the chassis shell 1, and the electric heater 11, the control panel 16, the temperature sensor 18, the air-cooled radiator 20, the pressure-sensitive sensor 19, the wheel track meter 15, the monitoring probe 14 and the safety indicator light 10 are all electrically connected to the power supply 17.

[0059] Specifically, a vertically distributed partition steel plate 4 is tightly fitted between the front and rear inner walls of the chassis shell 1, and the interior of the chassis shell 1 is divided into an experimental bin and a storage bin. The partition steel plate 4 is fixedly connected to two adjacent limit frames 8, and a plurality of evenly distributed holes are opened on the surface of the partition steel plate 4, and the holes connect the experimental bin and the storage bin.

[0060] Specifically, the load-bearing steel plate 2 is horizontally arranged, and the working surface of the pressure-sensitive sensor 19 is horizontally embedded in the inner side of the load-bearing steel plate 2. The surface of the chassis shell 1 is sprayed with insulating paint. In order to ensure the stability and reliability of the wheel track meter 15, the surface of the chassis shell 1 is insulated, and the internal material surface is subjected to high-precision grinding and polishing to ensure that the friction coefficient between the internal components is stable and small;

[0061] The load-bearing steel plate 2 is provided with a number of evenly distributed small holes to facilitate heat transfer and prevent the load-bearing steel plate 2 from deforming due to stress generated by thermal expansion and contraction.

[0062] Specifically, the load-bearing steel plate 2 and the limiting frame 8 are detachably connected by bolts 13, and anti-slip nails are provided at the installation positions of the load-bearing steel plate 2 and the limiting frame 8 for auxiliary fixation and position adjustment of the load-bearing steel plate 2 and the limiting frame 8, so that the gap between the limiting frame 8 and the load-bearing steel plate 2 is appropriate, avoiding problems such as poor transmission or increased wear caused by too large or too small a gap.

[0063] Preferably, the chassis shell 1 is hinged with a swing door 3 on one side of the storage bin, and a storage rack is provided in the storage bin for storing experimental specimens, so that their storage environment is consistent with the environment during the test, reducing experimental errors caused by environmental factors and improving experimental accuracy and reliability.

[0064] Specifically, a material changing door panel 7 is hingedly connected to one side of the chassis shell 1 located in the experimental chamber, and a transparent glass window is provided on the material changing door panel 7 to facilitate the replacement of experimental specimens and observation of the experimental process.

[0065] Specifically, two drawers 9 are movably connected to the bottom of the chassis shell 1, and the two drawers 9 are respectively arranged below the experimental compartment and the storage compartment.

[0066] Specifically, a plurality of evenly distributed support frames 12 are fixedly connected to the bottom of the chassis shell 1 , and the top of the support frame 12 located directly below the limiting frame 8 penetrates the chassis shell 1 and the load-bearing steel plate 2 and is fixedly connected to the support frame 12 .

[0067] A wheel pressure calibration method for a single-wheel wheel tracker on an airport pavement is based on an environment simulation system for a single-wheel wheel tracker on an airport pavement. The calibration method comprises the following steps:

[0068] S1. Place the test piece on the load-bearing steel plate 2 and fix it, connect the wheel track meter 15 to the power supply 17, and turn on the electrical components in the system;

[0069] S2. Input the preset wheel pressure value on the control panel 16 according to the actual measurement requirements. At the same time, ensure that the temperature sensor 18, the electric heater 11, the air-cooled radiator 20, the pressure-sensitive sensor 19, the monitoring probe 14 and the safety indicator light 10 are all in normal working condition;

[0070] S3, turning on the electric heater 11, so that the internal temperature of the chassis shell 1 gradually rises to the preset test temperature. During this process, the temperature change inside the chassis shell 1 is monitored in real time to keep the temperature within the set range. If the temperature exceeds the safe range, the controller 6 will automatically start the safety indicator light 10 and the air cooling radiator 20, and sound an alarm;

[0071] S4, after the temperature inside the chassis shell 1 is stabilized, the wheel track meter 15 is started, and the rolling wheel of the wheel track meter 15 is operated at a set movement speed. At this time, the pressure sensitive sensor 19 starts to monitor and record the contact area in real time, digitizes and graphs the pressure distribution, calculates the real pressure borne by the test piece according to the calibration data, and refines the fitting data;

[0072] S5, monitor the rolling wheel movement position feedback of the wheel track meter 15 in real time through the monitoring probe 14, and observe the reaction result after the pressure detection correction in combination with the control panel 16. If it is found that the pressure value deviates from the preset value, calibrate it by adjusting the parameters in the controller 6 until the pressure value is stabilized within the preset range, thereby realizing accurate control of the rolling wheel movement;

[0073] The deviation identification and parameter calibration process is as follows:

[0074] A permissible error threshold a of the pressure is set, such as 5% in this embodiment, the pressure-sensitive sensor 19 converts the detected pressure and contact area into an electrical signal, and converts it into a digital signal through an A / D converter, and compares the real-time measured pressure value with the preset wheel pressure value of the wheel track meter 15 inside the chassis shell 1. If the measured value exceeds the range of the preset value ±a, it is considered that there is a deviation, otherwise it is considered that there is no deviation;

[0075] When there is a deviation, the closed-loop control system of the wheel track meter 15 is used to adjust the telescopic rod on the top of the rolling wheel, thereby driving the height position of the rolling wheel to change, and the applied pressure is automatically adjusted by the following pressure correction formula until the pressure value returns to the preset range; if the automatic calibration fails or the system detects an abnormality (such as a sensor failure), it is necessary to stop the machine for manual calibration. Manual calibration can perform more detailed adjustments and troubleshooting to ensure that the wheel track meter 15 can provide accurate wheel pressure data during the measurement process;

[0076] F new =F desired ×A desired / A current

[0077] In the formula, F new is the corrected wheel pressure, in N;

[0078] F desired is the preset wheel pressure of the wheel track gauge 15 inside the chassis housing 1, in N;

[0079] A desired is the preset wheel pressure of the wheel track meter 15 inside the chassis housing 1, in KPa;

[0080] A current is the current wheel pressure detected by the pressure-sensitive sensor 19, in KPa;

[0081] S6. After the calibration is completed, the wheel rutting test is started, and the entire calibration process is recorded and archived for subsequent inspection and maintenance.

[0082] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An environmental simulation system for a single-wheel wheel track meter for an airport pavement, comprising a housing (1) located outside a wheel track meter (15), characterized in that: Four vertically distributed limit frames (8) are arranged in the middle of the chassis shell (1), and the four limit frames (8) are evenly distributed at the four corners of the wheel track meter (15) and are fixedly connected to the frame of the wheel track meter (15). A load-bearing steel plate (2) is installed between the plurality of limit frames (8), and a pressure-sensitive sensor (19) is installed on the load-bearing steel plate (2) for sensing the wheel rolling test pressure of the wheel track meter (15) in the vertical direction; The case shell (1) is provided with a temperature control mechanism, and the temperature control mechanism comprises an electric heater (11) and an air-cooled radiator (20), the electric heater (11) and the air-cooled radiator (20) being respectively located in the inner cavity of the case shell (1) and on the side wall of the case shell (1), a temperature sensor (18) being installed in the case shell (1) for sensing the temperature in the case shell (1), a monitoring probe (14) and a safety indicator light (10) being also installed in the case shell (1), the safety indicator light (10) sending out a prompt signal when the temperature in the case shell (1) is abnormal, and the monitoring probe (14) being used to monitor the movement trajectory and movement speed of the wheel track meter (15); A control panel (16) is arranged outside the chassis housing (1), and a connection end of the control panel (16) is electrically connected to a controller (6), and a connection end of the controller (6) is electrically connected to an emergency stop button (5) for emergency cutting off a working circuit of the wheel track meter (15); The input end and output end of the controller (6) are electrically connected to an A / D converter and a D / A converter respectively; the temperature sensor (18), the pressure sensitive sensor (19) and the monitoring probe (14) are all electrically connected to the A / D converter; the electric heater (11), the air-cooled radiator (20), the wheel track meter (15) and the safety indicator light (10) are all electrically connected to the D / A converter; and various results and control parameters are displayed and changed in real time through the control panel (16).

2. The environmental simulation system for a single-wheel wheel tracker for an airport pavement according to claim 1, characterized in that: A power supply (17) is installed on the chassis shell (1), and the electric heater (11), the control panel (16), the temperature sensor (18), the air-cooled radiator (20), the pressure-sensitive sensor (19), the wheel track meter (15), the monitoring probe (14) and the safety indicator light (10) are all electrically connected to the power supply (17).

3. The environmental simulation system for a single-wheel wheel tracker for an airport pavement according to claim 1, characterized in that: A vertically distributed partition steel plate (4) is tightly fitted between the front and rear walls inside the chassis shell (1), and the inside of the chassis shell (1) is divided into an experimental compartment and a storage compartment. The partition steel plate (4) is fixedly connected to two adjacent limit frames (8), and a plurality of evenly distributed holes are opened on the surface of the partition steel plate (4), and the holes connect the experimental compartment and the storage compartment.

4. The environmental simulation system for a single-wheel wheel tracker for an airport pavement according to claim 1, characterized in that: The load-bearing steel plate (2) is arranged horizontally, and the working surface of the pressure-sensitive sensor (19) is horizontally embedded in the inner side of the load-bearing steel plate (2), and the surface of the chassis shell (1) is sprayed with insulating paint; The load-bearing steel plate (2) is provided with a plurality of evenly distributed small holes.

5. The environmental simulation system for a single-wheel wheel tracker for an airport pavement according to claim 1, characterized in that: The load-bearing steel plate (2) and the limiting frame (8) are detachably connected via bolts (13), and anti-slip nails are provided at the installation positions of the load-bearing steel plate (2) and the limiting frame (8) for auxiliary fixing and position adjustment of the load-bearing steel plate (2) and the limiting frame (8).

6. The environmental simulation system for a single-wheel wheel tracker for an airport pavement according to claim 3, characterized in that: The case shell (1) is hingedly provided with a flat door (3) on one side of the storage bin, and a storage rack is provided in the storage bin for storing test pieces for experiments.

7. The environmental simulation system for a single-wheel wheel tracker for an airport pavement according to claim 3, characterized in that: The chassis shell (1) is hingedly connected to a refueling door panel (7) on one side of the experimental chamber, and a transparent glass window is provided on the refueling door panel (7); The bottom of the chassis shell (1) is movably connected to two drawers (9), and the two drawers (9) are respectively arranged below the experimental compartment and the storage compartment.

8. The environmental simulation system for a single-wheel wheel tracker for an airport pavement according to claim 1, characterized in that: The bottom of the chassis shell (1) is fixedly connected to a plurality of evenly distributed support frames (12), and the top of the support frame (12) located directly below the limiting frame (8) penetrates the chassis shell (1) and the load-bearing steel plate (2) and is fixedly connected to the support frame (12).

9. A wheel pressure calibration method for an environmental simulation system for a single-wheel wheel track meter on an airport pavement according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Place the test piece on the load-bearing steel plate (2) and fix it, connect the wheel track meter (15) to the power supply (17), and turn on the electrical components in the system; S2. Input a preset wheel pressure value on the control panel (16) according to actual measurement requirements, and at the same time, ensure that the temperature sensor (18), the electric heater (11), the air-cooled radiator (20), the pressure-sensitive sensor (19), the monitoring probe (14) and the safety indicator light (10) are all in normal working condition; S3, turning on the electric heater (11) to gradually raise the internal temperature of the chassis shell (1) to a preset test temperature. During this process, the temperature change inside the chassis shell (1) is monitored in real time to keep the temperature within a set range. If the temperature exceeds a safe range, the controller (6) will automatically start the safety indicator light (10) and the air-cooling radiator (20), and sound an alarm; S4. After the temperature inside the chassis housing (1) is stabilized, the wheel track meter (15) is started, and the rolling wheel of the wheel track meter (15) is operated at a set movement speed. At this time, the pressure sensitive sensor (19) starts to monitor and record the contact area in real time, digitizes and graphs the pressure distribution, calculates the actual pressure borne by the test piece based on the calibration data, and refines the fitting data; S5. Observe the reaction result after pressure detection correction through the control panel (16). If it is found that the pressure value deviates from the preset value, calibrate by adjusting the parameters in the controller (6) until the pressure value is stabilized within the preset range; S6. After the calibration is completed, the wheel rutting test is started and the entire calibration process is recorded and archived.

10. The method for calibrating wheel pressure of a single wheel rudder on an airport pavement according to claim 9, characterized in that: The deviation determination and parameter calibration process in S5 is specifically as follows: A permissible error threshold a of the pressure is set, the pressure-sensitive sensor (19) converts the detected pressure and contact area into an electrical signal, and converts it into a digital signal through an A / D converter, and compares the real-time measured pressure value with the preset wheel pressure value of the wheel track meter (15) inside the chassis shell (1). If the measured value exceeds the range of the preset value ±a, it is considered that there is a deviation; otherwise, it is considered that there is no deviation; When there is a deviation, the closed-loop control system of the wheel track meter (15) is used to automatically adjust the applied pressure through the following pressure correction formula until the pressure value returns to the preset range; F new =F desired ×A desired / A current In the formula, F new is the corrected wheel pressure, F desired is the preset wheel pressure of the wheel track gauge (15) inside the chassis housing (1), A desired is the preset wheel pressure of the wheel track meter (15) inside the chassis housing (1), A current It is the current wheel pressure detected by the pressure-sensitive sensor (19).

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