An intelligent anti-rollover system for dump truck and control method thereof

Abstract

The invention relates to the technical field of dump trucks, and in particular to an intelligent anti-rollover system of a dump truck and a control method thereof, comprising a pressure sensor for detecting changes in air pressure on a vehicle suspension system and wheels, an angle measuring instrument for detecting changes in the posture of the dump truck, a speed measuring instrument for detecting the speed of an engine, an on-board computer for data acquisition, an ECU for sending control signals, a T-shaped frame and a pneumatic hydraulic pump, wherein both sides of the upper end of the T-shaped frame are provided with pneumatic hydraulic pumps, and both sides of the lower end of the T-shaped frame are provided with anti-rollover pneumatic hydraulic rods. In the invention, when the dump truck rolls over, the anti-rollover system can not only react quickly but also have a very stable effect by combining pneumatic transmission with hydraulic transmission, and at the same time, combined with a software control system, it has a triple detection link, which can effectively reduce the probability of misjudgment, and the anti-rollover mechanism is based on the original dump truck structure, and the anti-rollover system is added or removed, so that the whole system is modularized.

Description

Technical Field

[0001] The present invention relates to the technical field of dump trucks, and in particular to an intelligent anti-rollover system of a dump truck and a control method thereof. Background Art

[0002] Dump trucks have large carrying capacity and high performance, and are widely used in mining, agriculture, civil engineering and other operations. However, due to their high center of gravity, once they encounter a large slope or special circumstances, the center offset is large and they are prone to rollover.

[0003] Although some dump trucks have been installed with anti-rollover devices, they still have some shortcomings. For example, the load of the dump truck changes continuously during the unloading process, which affects the center of gravity of the vehicle. The anti-rollover system is usually adjusted according to the pre-set load conditions. Therefore, when the load changes, the system cannot adapt in time, resulting in poor effect of the anti-rollover system. In addition, the existing anti-rollover system has high working conditions. When the vehicle operates under unexpected working conditions, such as uneven roads or turning at too fast a speed, the anti-rollover system cannot respond in time and it is difficult to achieve an anti-rollover effect. Therefore, in response to the above problems, an intelligent anti-rollover system and a control method for a dump truck are proposed. Summary of the invention

[0004] The purpose of the present invention is to provide an intelligent anti-rollover system for a dump truck and a control method thereof, so as to solve the problem that although some dump trucks have been installed with anti-rollover devices, there are still some shortcomings, such as the load of the dump truck constantly changes during the unloading process, which affects the center of gravity position of the vehicle, and the anti-rollover system is usually adjusted according to pre-set load conditions. Therefore, when the load changes, the system cannot adapt in time, resulting in poor effect of the anti-rollover system; in addition, the existing anti-rollover system has high working condition requirements. When the vehicle is running under unexpected working conditions, such as uneven roads or turning at too fast a speed, the anti-rollover system cannot respond in time and it is difficult to achieve the anti-rollover effect.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An intelligent anti-rollover system for a dump truck and a control method thereof, comprising a pressure sensor for detecting changes in air pressure on a vehicle suspension system and wheels, an angle measuring instrument for detecting changes in the posture of the dump truck, a speed measuring instrument for detecting the size of an engine speed, an on-board computer for data acquisition, an ECU for sending control signals, a T-shaped frame and a pneumatic hydraulic pump, wherein pneumatic hydraulic pumps are installed on both sides of the upper end of the T-shaped frame, and anti-rollover pneumatic hydraulic rods are installed on both sides of the lower end of the T-shaped frame, the other end of the anti-rollover pneumatic hydraulic rod is connected to a rotating shaft connector, one end of the rotating shaft connector is connected to the pneumatic hydraulic telescopic rod through a spring and a telescopic rod, the other end of the rotating shaft connector is connected to a triangular prism support frame, the other end of the pneumatic hydraulic telescopic rod is connected to a large torque motor fixing frame, and a large torque motor is fixedly connected to the inner side of the large torque motor fixing frame; the pneumatic hydraulic pump comprises an air inlet, an exhaust hole, a high-pressure chamber, an air pressure chamber, and a high-pressure hose , a two-position five-way solenoid valve, and a two-way limit cylinder body, one side of the pneumatic hydraulic pump is provided with an air inlet hole, and the other side of the pneumatic hydraulic pump is provided with an exhaust hole, the two-position five-way solenoid valve is fixedly connected to a high-pressure hose, the other end of the high-pressure hose is fixedly connected to the two-way limit cylinder body, the other end of the two-position five-way solenoid valve is fixedly connected to the high-pressure warehouse through the high-pressure hose, one side of the high-pressure warehouse is fixedly connected to the air pressure chamber, one end of the air pressure chamber is fixedly connected with a gas-liquid pipeline, a gas-liquid sealing piston is slidably connected inside the gas-liquid pipeline, the inner side of one end of the gas-liquid pipeline away from the air pressure chamber is fixedly connected with a limit ring, and the gas-liquid pipeline is respectively connected with the anti-rollover pneumatic hydraulic rod and the pneumatic hydraulic telescopic rod; the anti-rollover pneumatic hydraulic rod and the pneumatic hydraulic rod fixedly have a positioning ring on the inner side of the fixed end, one end of the positioning ring is fixedly connected with a hydraulic return spring, the other end of the hydraulic return spring is fixedly connected to the hydraulic sealing piston, and a hydraulic chamber is opened on the other side of the hydraulic sealing piston.

[0007] As a further optimization of the present invention, the air inlet is connected to the air compressor via a one-way valve and a high-pressure hose, and the air outlet is connected to the vacuum pump via a one-way valve and a high-pressure hose.

[0008] As a further optimization content of the present invention, the two-position five-way solenoid valve includes a first air hole, a second air hole, a third air hole, a fourth air hole and a fifth air hole, the first air hole and the second air hole are connected to the two-way limit cylinder body through a high-pressure hose, the fourth air hole is connected to the high-pressure chamber through a high-pressure hose, and the first air hole is connected to the air inlet control chamber, and the second air hole is connected to the exhaust port control chamber.

[0009] As a further optimization of the present invention, the two-way limit cylinder body is slidably connected with a two-way piston, a limit spring is installed on the middle outer side of the two-way piston, an air inlet control chamber is provided on the inner side of one end of the two-way limit cylinder body, an exhaust port control chamber is provided on the inner side of the other end of the two-way limit cylinder body, and air outlet holes are opened on the top of the two-way limit cylinder body.

[0010] As a further optimization of the present invention, a DC brushless motor is fixedly connected inside the triangular prism support frame, a crawler drive wheel is fixedly connected to the top of the DC brushless motor main shaft, and a crawler track is installed on the outside of the crawler drive wheel.

[0011] As a further optimization of the present invention, there are three crawler tracks, which are installed on the inner sides of the three end faces of the triangular prism support frame, and there are four crawler drive wheels installed inside any crawler track, and the crawler drive wheels correspond one-to-one to the DC brushless motor, and the DC brushless motor is controlled by the ECU.

[0012] As a further optimization of the present invention, the gas-liquid sealing piston and the hydraulic sealing piston are both conically arranged, and the contact area between the hydraulic sealing piston and the gas is three times that of the gas-liquid sealing piston.

[0013] As a further optimized content of the present invention, the vertical section of the T-frame is T-shaped, the T-frame and the anti-rollover pneumatic hydraulic rod are connected by a pin shaft, and the high-torque motor fixing frame is fixed to one side of the dump truck frame by bolts.

[0014] As a further optimized content of the present invention, wherein: the control signal generated by the ECU is transmitted to the solenoid valve to control the on and off of the solenoid valve.

[0015] As further optimized content of the present invention, wherein: S1: detecting the change of the dump truck posture by using the deflection measuring instrument, detecting the change of the air pressure on the vehicle suspension system or the wheel by the pressure sensor, and detecting the engine speed by the speed measuring instrument;

[0016] S2: Transmit the collected data back to the on-board computer;

[0017] S3: When it is determined that the dump truck has a rollover risk, the specific lengths of the anti-rollover pneumatic hydraulic rod and the pneumatic hydraulic telescopic rod that need to be extended, as well as the angle at which the high-torque motor needs to rotate, are calculated, and the ECU then controls the high-torque motor and the pneumatic hydraulic pump to work.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In the present invention, when the dump truck rolls over, the anti-rollover system can not only react quickly but also have a very stable effect by combining pneumatic transmission with hydraulic transmission. At the same time, it has a triple detection link combined with the software control system, which can effectively reduce the probability of misjudgment. In addition, the anti-rollover mechanism is based on the original dump truck structure, and the anti-rollover system is added or removed, and the whole system is modularized for easy maintenance. At the same time, the anti-rollover mechanism is equipped with rotating shaft connectors on both sides, and the device can rotate arbitrarily. After contacting the ground, it can rotate due to force to better cope with various inclined roads, increase the road adhesion coefficient, and improve the stability of the vehicle body;

[0020] 2. In the present invention, the triangular prism frame structure unique to the anti-rollover mechanism has a track on one side that has reduced mass due to long-term friction. Since the device can rotate arbitrarily according to the rotating shaft, the track on the side with a larger mass of the three sides of the anti-rollover mechanism is more inclined to the ground, so that the track on the side with a larger mass always contacts the ground first, and the durability is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the installation position structure of the anti-rollover pneumatic hydraulic rod of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the double-pass limit cylinder of the present invention;

[0024] Figure 4 It is a schematic diagram of the internal structure of the double-pass limit cylinder of the present invention;

[0025] Figure 5 For the present invention Figure 2 A schematic diagram of the enlarged structure at point A;

[0026] Figure 6 It is a schematic diagram of the internal structure of the crawler of the present invention;

[0027] Figure 7 This is a schematic diagram of the internal structure of the gas-liquid pipeline of the present invention;

[0028] Figure 8 This is a schematic diagram of the installation position structure of the positioning ring of the present invention;

[0029] Fig. 9 It is a schematic diagram of the T-shaped frame structure of the present invention;

[0030] Fig.10 This is a schematic diagram of the structure of the brushless DC motor of the present invention;

[0031] Fig.11 This is an internal cross-sectional view of a two-position five-way solenoid valve of the present invention;

[0032] Fig.12 It is a control principle diagram of the software control system of the present invention.

[0033] In the figure: 1. air inlet; 2. exhaust hole; 3. high-pressure chamber; 4. air pressure chamber; 5. high-pressure hose; 6. gas-liquid pipeline; 7. gas-liquid sealing piston; 8. limit ring; 9. hydraulic sealing piston; 10. hydraulic chamber; 11. hydraulic return spring; 12. positioning ring; 13. double-pass limit cylinder; 14. two-way piston; 15. limit spring; 16. anti-rollover pneumatic hydraulic rod; 17. high-torque motor; 18. high-torque motor fixing bracket; 19. pneumatic hydraulic telescopic rod; 20. spring; 21. telescopic rod; 22. crawler; 23. triangular prism support frame; 24. T-shaped frame;

[0034] 25, two-position five-way solenoid valve; 251, first air hole; 252, second air hole; 253, third air hole; 254, fourth air hole; 255, fifth air hole;

[0035] 26. Track drive wheel; 27. DC brushless motor; 28. Pneumatic hydraulic pump; 29. ​​Air inlet control room; 30. Exhaust outlet control room; 31. Air outlet; 32. Rotating shaft connector. DETAILED DESCRIPTION

[0036] Embodiment 1

[0037] See also Figure 1 , Figure 2 , Figure 5 As shown, this example provides an intelligent anti-rollover system for a dump truck and a control method thereof, wherein the anti-rollover system mainly includes: a pneumatic hydraulic telescopic rod 19, a high-torque motor 17, an anti-rollover pneumatic hydraulic rod 16, a crawler 22, a triangular prism support frame 23, a crawler drive wheel 26, a high-torque motor fixing frame 18, a pneumatic hydraulic pump 28, a spring 20, and a telescopic rod 21;

[0038] See also Figure 3 As shown, the pneumatic hydraulic pump includes: an air inlet 1, an exhaust hole 2, a high-pressure chamber 3, an air pressure chamber 4, a high-pressure hose 5, a two-position five-way solenoid valve 25, and a two-way limit cylinder 13. The air compressor is connected to the one-way valve with a high-pressure hose and connected to the air inlet 1. The vacuum pump is connected to the one-way valve and the exhaust hole 2 through a high-pressure hose. The one-way valve prevents the high-pressure gas from flowing back.

[0039] See also Figure 4 , Fig.11 As shown, the two-way limit cylinder includes a two-way piston 14, an air outlet 31, a limit spring 15, an air inlet control chamber 29, and an exhaust port control chamber 30, and the two-position five-way solenoid valve includes a first air hole 251, a second air hole 252, a third air hole 253, a fourth air hole 254, and a fifth air hole 255;

[0040] The ECU receives signals from the sensor and generates control signals according to pre-set logic and algorithms to open or close the passage of the solenoid valve. These control signals are transmitted to the solenoid valve through the ECU output interface to control its switch state.

[0041] The opening and closing of the air outlet 31 is controlled by using a two-position five-way solenoid valve 25. The two-position five-way solenoid valve and the fourth air hole 254 are connected to the air compressor through a high-pressure hose 5. The third air hole 253 and the fourth air hole 254 are connected to the outside. The first air hole 251 and the second air hole 252 are connected to the two-way limit cylinder body 13 through the high-pressure hose 5. At the same time, the first air hole 251 is connected to the air inlet control chamber 29, and the second air hole 252 is connected to the exhaust port control chamber 30.

[0042] When the deflection angle of the deflection measuring instrument reaches the threshold value, the ECU controls the conduction and cutoff of the fourth air hole 254 and the first air hole 251 and the second air hole 252, thereby controlling the relative size of the air pressure in the air inlet control chamber 29 and the exhaust control chamber 30, and finally realizes the conduction and cutoff of the air outlet 31; when the air pressure in the air inlet control chamber 29 is greater than the air pressure in the exhaust control chamber 30, the two-way piston 14 moves in the direction of the lower air pressure, so that the air outlet 31 is closed, so that the high-pressure chamber 3 stores the high-pressure gas; on the contrary, when the air pressure in the air inlet control chamber 29 is less than the air pressure in the exhaust control chamber 30, the two-way piston 14 moves in the direction of the lower air pressure, so that the air outlet 31 is opened, the exhaust pipe is closed, and the high-pressure gas enters the air pressure chamber 4;

[0043] See also Figure 5 As shown, the rollover prevention mechanism is mainly composed of a spring 20, a telescopic rod 21, a shaft connector 32 and other parts. Its function is to adapt to the pneumatic hydraulic telescopic rod 19 and the rollover prevention pneumatic hydraulic rod 16 to maintain a stable connection with the triangular prism support frame 23 when they are extended to different lengths;

[0044] See also Figure 6 , Fig.10 As shown, the triangular prism support frame has three faces, each of which has a crawler track 22 and four crawler track drive wheels 26. The crawler track drive wheels 26 are connected to the DC brushless motor 27 through a keyway. The on-board computer and ECU control the speed of the DC brushless motor, thereby controlling the speed of the crawler track drive wheels 26.

[0045] See also Figure 7 , Figure 8As shown, the pneumatic hydraulic telescopic rod 19 has the same internal structure as the anti-rollover pneumatic hydraulic rod 16, both of which are composed of a hydraulic sealing piston 9, a hydraulic return spring 11, and a positioning ring 12. When high-pressure gas enters the gas-liquid pipeline 6, the gas-liquid sealing piston 7 is pushed to move, thereby pushing the hydraulic oil below. The limit ring 8 limits the movement of the gas-liquid sealing piston 7. The hydraulic chamber 10 transmits pressure through the hydraulic oil, so that the hydraulic sealing piston 9 moves and compresses the hydraulic return spring 11. When the gas is extracted from the gas-liquid pipeline 6, the pressure in the hydraulic chamber 10 decreases, and the hydraulic sealing piston 9 returns to the upper end of the hydraulic chamber 10 under the elastic force of the hydraulic return spring 11 and the atmospheric pressure. The piston is designed to be conical in shape to better fit the cavity contact and enhance its sealing performance.

[0046] See also Fig. 9 The anti-rollover pneumatic hydraulic rod 16 is connected to the T-shaped frame via a pin shaft, so that the anti-rollover pneumatic hydraulic rod can rotate around the pin shaft, thereby better cooperating with the rotation of the pneumatic hydraulic telescopic rod 19.

[0047] Embodiment 2

[0048] Combined with Figure 1-12 , the method of using the present invention is as follows:

[0049] When the dump truck is started, the air compressor starts working together to provide high-pressure gas for the pneumatic hydraulic pump. At this time, the two-position five-way solenoid valve is closed, and the air compressor first discharges the high-pressure gas into the two-way limit cylinder 13 through the high-pressure hose 5. The internal two-way piston 14 moves under pressure, blocking the air outlet. After 1 second, the air compressor starts to provide high-pressure gas to the high-pressure chamber 3 through the high-pressure hose 5, and the two-way piston blocks the air outlet 31. At this time, the high-pressure chamber 3 can store high-pressure gas;

[0050] When the dump truck starts, the ECU control system begins to receive the pressure measurement values ​​of the suspension system and wheel pressure from the pressure sensor, the angle measurement values ​​of the suspension system and steering system from the deflection measuring instrument, and the speed measurement value of the engine from the speed measuring instrument. The detection sequence is: the pressure measurement value of the pressure sensor - the angle measurement value of the deflection measuring instrument - the speed measurement value of the speed measuring instrument;

[0051] When the pressure sensor's pressure measurement value is less than the preset rollover risk threshold, the onboard computer determines that it is safe;

[0052] When the pressure measurement value of the pressure sensor is greater than the preset rollover risk threshold, and the angle measurement value of the deflection measuring instrument is less than the set rollover risk threshold, the on-board computer determines that it is safe;

[0053] When the pressure measurement value of the pressure sensor is greater than the preset rollover hazard threshold, the angle measurement value of the deflection measuring instrument is greater than the preset rollover hazard threshold, and the speed measurement value of the speed measuring instrument is less than the preset rollover hazard threshold, the on-board computer determines that it is safe;

[0054] When the pressure measurement value of the pressure sensor is greater than the preset rollover danger threshold, the angle measurement value of the deflection measuring instrument is greater than the preset rollover danger threshold, and the speed measurement value of the speed measuring instrument is greater than the preset rollover danger threshold, the on-board computer determines that it is dangerous and activates the anti-rollover system;

[0055] After the software control system has undergone triple detection, combined with the data fed back to the software control system by the pressure sensor and the deflection measuring instrument, the software control system is calculated, and finally the position of the dump truck is calculated, and the rotation angle of the large torque motor 17 and the extension angle of the pneumatic hydraulic telescopic rod 19 are calculated. The two-position five-way solenoid valve 25 is quickly energized, and the two-way piston 14 is driven to move, thereby opening the air outlet 31, and the exhaust pipe is closed at the same time. The air pressure chamber 4 is quickly connected to the high-pressure chamber 3, and the air pressure rises, thereby pushing the gas-liquid sealing piston 7 to squeeze the hydraulic oil, and then pushing the hydraulic sealing piston 9 to extend the pneumatic hydraulic rod 19 and the anti-rollover pneumatic hydraulic rod 16, so that the triangular prism support frame 23 can be reasonably extended to the corresponding angle and length of the vehicle body according to the inclination angle of the vehicle body to prevent further rollover, and the position of the triangular prism support frame 23 is adjusted by further pressurization of the pneumatic hydraulic pump 28 and the angle change of the large torque motor 17, so that the position of the dump truck is corrected at the fastest speed to straighten the vehicle body;

[0056] When the triangular prism support frame 23 contacts the ground, due to the force of the ground and its ability to rotate around the telescopic rod, the triangular prism support frame 23 can make the side with the track 22 contact the ground. When the track 22 contacts the ground, the ECU controls the brushless DC motor 27 to keep its speed slightly higher than the driving speed of the dump truck to offset part of the rollover torque and help the vehicle body regain balance.

[0057] Embodiment 3

[0058] The present invention also provides a vehicle rollover prevention judgment and control method, comprising the following steps:

[0059] S1: The pressure sensor obtains the air pressure changes on the dump truck's suspension system or wheels;

[0060] S2: Compare the value measured by the pressure sensor with the left and right height difference threshold of the vehicle body through the software control system;

[0061] S3: When the value measured by the pressure sensor is greater than the left and right height difference threshold of the vehicle body, the anti-rollover system is initialized and ready to start;

[0062] S4: The deflection measuring instrument can measure the position and angle changes of the dump truck's suspension system, body structure or steering system;

[0063] S5: comparing the measured data of the deflection angle measuring instrument with the deflection angle threshold of the vehicle body;

[0064] S6: when the deflection angle measuring instrument is greater than the vehicle body deflection angle threshold, the speed measuring instrument is initialized to measure the engine speed;

[0065] S7: Comparing the speed measuring instrument with the engine speed threshold through the software control system;

[0066] S8: When the software control system detects that the test results of the pressure sensor, the angle measuring instrument, and the speed measuring instrument are all greater than their corresponding thresholds, the on-board computer controls the ECU to start the anti-rollover system.

[0067] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. An intelligent anti-rollover system for a dump truck, comprising a pressure sensor for detecting changes in air pressure on a vehicle suspension system and wheels, an angle measuring instrument for detecting changes in the attitude of the dump truck, a speed measuring instrument for detecting the speed of an engine, an on-board computer for data collection, an ECU for sending control signals, a T-frame (24) and a pneumatic hydraulic pump (28), characterized in that: Pneumatic hydraulic pumps (28) are installed on both sides of the upper end of the T-shaped frame (24), and anti-rollover pneumatic hydraulic rods (16) are installed on both sides of the lower end of the T-shaped frame (24). The other end of the anti-rollover pneumatic hydraulic rod (16) is connected to a rotating shaft connector (32), one end of the rotating shaft connector (32) is connected to a pneumatic hydraulic telescopic rod (19) through a spring (20) and a telescopic rod (21), the other end of the rotating shaft connector (32) is connected to a triangular prism support frame (23), and the other end of the pneumatic hydraulic telescopic rod (19) is connected to a high-torque motor fixing frame (18), and a high-torque motor (17) is fixedly connected to the inner side of the high-torque motor fixing frame (18); The pneumatic hydraulic pump (28) comprises an air inlet (1), an air outlet (2), a high-pressure chamber (3), an air pressure chamber (4), a high-pressure hose (5), a two-position five-way solenoid valve (25), and a two-way limit cylinder (13). The pneumatic hydraulic pump (28) is provided with an air inlet (1) on one side, and an air outlet (2) on the other side. The two-position five-way solenoid valve (25) is fixedly connected to the high-pressure hose (5), and the other end of the high-pressure hose (5) is fixedly connected to the two-way limit cylinder (13). The other end of the electromagnetic valve (25) is fixedly connected to the high-pressure chamber (3) through a high-pressure hose (5); one side of the high-pressure chamber (3) is fixedly connected to the air pressure chamber (4); one end of the air pressure chamber (4) is fixedly connected to a gas-liquid pipeline (6); a gas-liquid sealing piston (7) is slidably connected inside the gas-liquid pipeline (6); a limiting ring (8) is fixedly connected to the inner side of one end of the gas-liquid pipeline (6) away from the air pressure chamber (4); and the gas-liquid pipeline (6) is respectively connected to the anti-rollover pneumatic hydraulic rod (16) and the pneumatic hydraulic telescopic rod (19); A positioning ring (12) is fixedly connected to the inner side of the fixed end of the anti-rollover pneumatic hydraulic rod (16) and the pneumatic hydraulic telescopic rod (19); one end of the positioning ring (12) is fixedly connected to a hydraulic return spring (11); the other end of the hydraulic return spring (11) is fixedly connected to a hydraulic sealing piston (9); and a hydraulic chamber (10) is provided on the other side of the hydraulic sealing piston (9).

2. The intelligent anti-rollover system for a dump truck according to claim 1, characterized in that: The air inlet (1) is connected to an air compressor via a one-way valve and a high-pressure hose (5), and the air outlet (2) is connected to a vacuum pump via a one-way valve and a high-pressure hose (5).

3. The intelligent anti-rollover system for a dump truck according to claim 1, characterized in that: The two-position five-way solenoid valve (25) comprises a first air hole (251), a second air hole (252), a third air hole (253), a fourth air hole (254) and a fifth air hole (255); the first air hole (251) and the second air hole (252) are connected to the two-way limit cylinder (13) through a high-pressure hose (5); the fourth air hole (254) is connected to the high-pressure chamber (3) through a high-pressure hose (5); the first air hole (251) is connected to the air inlet control chamber (29); and the second air hole (252) is connected to the exhaust port control chamber (30).

4. The intelligent anti-rollover system for a dump truck according to claim 1, characterized in that: A bidirectional piston (14) is slidably connected inside the two-way limit cylinder (13), a limit spring (15) is installed on the middle outer side of the two-way piston (14), an air inlet control chamber (29) is provided on the inner side of one end of the two-way limit cylinder (13), an exhaust port control chamber (30) is provided on the inner side of the other end of the two-way limit cylinder (13), and an air outlet hole (31) is provided on the top end of the two-way limit cylinder (13).

5. The intelligent anti-rollover system for a dump truck according to claim 1, characterized in that: A direct current brushless motor (27) is fixedly connected inside the triangular prism support frame (23), a crawler drive wheel (26) is fixedly connected to the top of the main shaft of the direct current brushless motor (27), and a crawler belt (22) is installed outside the crawler drive wheel (26).

6. The intelligent anti-rollover system for a dump truck according to claim 5, characterized in that: There are three crawler tracks (22), which are installed on the inner sides of three end surfaces of the triangular prism support frame (23). There are four crawler track drive wheels (26) installed inside any crawler track (22), and the crawler track drive wheels (26) correspond to the DC brushless motors (27) one by one, and the DC brushless motors (27) are controlled by the ECU.

7. The intelligent anti-rollover system for a dump truck according to claim 1, characterized in that: The gas-liquid sealing piston (7) and the hydraulic sealing piston (9) are both arranged in a conical shape, and the contact area between the hydraulic sealing piston (9) and the gas is three times that of the gas-liquid sealing piston (7).

8. The intelligent anti-rollover system for a dump truck according to claim 1, characterized in that: The vertical cross section of the T-shaped frame (24) is T-shaped, the T-shaped frame (24) and the anti-rollover pneumatic hydraulic rod (16) are connected via a pin shaft, and the high-torque motor fixing frame (18) is fixed to one side of the dump truck frame via bolts.

9. The intelligent anti-rollover system for a dump truck according to claim 1, characterized in that: The ECU receives a signal from a sensor, and generates a control signal which is transmitted to the solenoid valve to control the on and off of the solenoid valve.

10. A control method for an intelligent anti-rollover system of a dump truck according to any one of claims 1 to 9, characterized in that: S1: The change of the dump truck's posture is detected by the deflection measuring instrument, the pressure sensor detects the change of the air pressure on the vehicle's suspension system or wheels, and the speed measuring instrument detects the engine speed; S2: Transmit the collected data back to the on-board computer; S3: When it is determined that the dump truck has a risk of rollover, the specific lengths that the anti-rollover pneumatic hydraulic rod (16) and the pneumatic hydraulic telescopic rod (19) need to extend, as well as the angle that the high-torque motor (17) needs to rotate, are calculated, and the ECU then controls the high-torque motor (17) and the pneumatic hydraulic pump (28) to operate.

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