Method and system for determining expected impact area of buffer retaining wall and buffer retaining wall

Abstract

The invention discloses a method and a system for determining an expected impact area of a buffer retaining wall and the buffer retaining wall. The method comprises the following steps: determining a first speed of a vehicle reaching a first boundary area and a second speed of the vehicle reaching a second boundary area in sequence; determining speed change information according to the first speed and the second speed; determining whether the vehicle impacts the buffer retaining wall according to the first speed and the speed change information; if yes, the expected collision area is determined on the buffer retaining wall according to the driving direction of the vehicle in the first boundary area. Whether the vehicle collides with the buffer retaining wall or not is judged according to the speed change of the vehicle, and after it is judged that the vehicle collides with the buffer retaining wall, the collision area is pre-judged according to the driving direction of the vehicle, so that protection is started in a targeted mode subsequently, the protection efficiency is remarkably improved, and energy waste is reduced.

Description

Technical Field

[0001] The present invention belongs to the road vehicle hazard avoidance technology, and particularly relates to a method and system for determining an expected impact area of a buffer retaining wall and a buffer retaining wall. Background Art

[0002] In open-pit mine operations, large mining trucks, as key transportation equipment, undertake the transportation tasks of ore and waste. However, due to the complexity and uncertainty of the mine environment, mining trucks may encounter various emergencies during operation, such as power loss and brake failure. Once these situations occur, they will pose a serious threat to the driving safety of the mining trucks. Especially on the ramp, if the mining truck slips due to a breakdown, its potential hazards cannot be ignored.

[0003] To protect the driving safety of mining trucks and reduce the harm of slipping accidents, mining enterprises generally set up buffer retaining walls on the buffer platforms of the ramps as the last line of defense. Currently, the mine retaining walls mainly include: sandbag retaining walls, concrete retaining walls, and tire retaining walls.

[0004] However, when the existing mine retaining walls are dealing with vehicle collision accidents, they can only passively withstand the impact force, and cannot predict the impact area for targeted protection of the impact area, resulting in low protection efficiency and unnecessary energy and resource consumption. Summary of the Invention

[0005] To solve the above problems, the present invention discloses a method and system for determining an expected impact area of a buffer retaining wall and a buffer retaining wall.

[0006] The present invention discloses a method for determining an expected impact area of a buffer retaining wall, including the following steps: Determine the first speed of the vehicle reaching the first boundary area and the second speed of the vehicle reaching the second boundary area in sequence; Determine the speed change information according to the first speed and the second speed; Determine whether the vehicle hits the buffer retaining wall according to the first speed and the speed change information; If so, determine the expected impact area on the buffer retaining wall according to the driving direction of the vehicle in the first boundary area.

[0007] Preferably, determining whether the vehicle hits the buffer retaining wall according to the first speed and the speed change information is specifically: Determine the braking information of the vehicle according to the first speed and the speed change information; Determine whether the vehicle hits the buffer retaining wall according to the braking information of the vehicle.

[0008] Preferably, an impact expected area is determined on the buffer retaining wall according to the driving direction of the vehicle in the first boundary area, specifically: Determine the driving trajectory of the vehicle in the first boundary area according to the driving direction; Determine the impact expected area on the buffer retaining wall according to the driving trajectory.

[0009] The present invention also discloses a system for determining an impact expected area of a buffer retaining wall, including: A speed acquisition module, configured to determine a first speed at which the vehicle arrives at the first boundary area in sequence and a second speed at which the vehicle arrives at the second boundary area; A speed change determination module, configured to determine speed change information according to the first speed and the second speed; A vehicle determination module, configured to determine whether the vehicle impacts the buffer retaining wall according to the first speed and the speed change information; An area determination module, configured to determine an impact expected area on the buffer retaining wall according to the driving direction of the vehicle in the first boundary area after determining that the vehicle impacts the buffer retaining wall.

[0010] The present invention also discloses a buffer retaining wall, including: a retaining wall system, a system for determining an impact expected area of the buffer retaining wall, and a control system; The system for determining an impact expected area of the buffer retaining wall is connected to the control system, and both are arranged on the retaining wall system; A plurality of connected first anti-collision modules are provided on one side of the retaining wall system facing the vehicle; The system for determining an impact expected area of the buffer retaining wall is configured to determine an impact expected area on the buffer retaining wall; The control system is connected to each first anti-collision module, and is configured to control the start of the first anti-collision module corresponding to the impact expected area while determining the impact expected area.

[0011] Preferably, the buffer retaining wall further includes a monitoring system; The monitoring system, the system for determining an impact expected area of the buffer retaining wall, and the control system are arranged side by side on the retaining wall system, and are configured to monitor the impact parameters of the retaining wall system and feedback them to the terminal safety warning center; The monitoring system includes at least one of an inclination angle monitoring module, a vibration intensity monitoring module, and a temperature change monitoring module.

[0012] Preferably, the retaining wall system further includes a second anti-collision module and a third anti-collision module arranged in sequence along the direction away from the first anti-collision module; The second anti-collision module and the third anti-collision module are both arranged on the side of the first anti-collision module away from the vehicle; The first anti-collision module is used to provide flexible wrapping for the vehicle and reduce the damage suffered by the vehicle at the moment of impact; The second anti-collision module is connected to the first anti-collision module and is used to disperse and absorb the impact force; The third anti-collision module is used to provide support for the first anti-collision module and the second anti-collision module and consume the remaining impact force.

[0013] Preferably, the second anti-collision module includes: a plurality of auxetic unit cell arrays arranged at intervals on the side of the first anti-collision module away from the vehicle; Each auxetic unit cell array includes a plurality of auxetic unit cells arranged periodically in the same plane; The cross-section of the auxetic unit cell is any one of a hexagon, a rhombus and a triangle.

[0014] Preferably, the internal pores of the auxetic unit cell are of a gradient structure, and the size of the internal pores gradually increases in the direction close to the vehicle.

[0015] Preferably, the buffer wall further includes a power supply system; The power supply system is respectively connected to the buffer wall impact expected area determination system, the control system and the monitoring system.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention first judges whether the vehicle impacts the buffer wall according to the speed change of the vehicle. After judging that the vehicle impacts the buffer wall, it predicts the impact area according to its driving direction so as to start targeted protection subsequently, significantly improving the protection efficiency and reducing the waste of energy; (2) By integrating a variety of monitoring modules (such as inclination monitoring, vibration intensity monitoring and temperature change monitoring), the present invention can timely feedback the impact parameters to the safety terminal after an accident, facilitating the rapid adoption of rescue measures and improving the timeliness and accuracy of accident response; (3) Through the multi-level anti-collision module design, the present invention can effectively disperse and absorb the impact force, reduce the damage suffered by the vehicle at the moment of impact, and at the same time consume the remaining impact force, enhancing the overall protection ability of the buffer wall; (4) By using the auxetic unit cell array as the core structure of the second anti-collision module and combining with the gradient pore design, the present invention further optimizes the absorption and dispersion effect of the impact force and improves the anti-impact performance of the buffer wall; (5) By closely combining the buffer wall impact expected area determination system with the control system, the present invention realizes intelligent protection, can start the protection strategy at the moment of impact, and improves the active protection ability of the buffer wall; (6) By setting up the power supply system, the present invention ensures the stable operation of each functional module of the buffer retaining wall, enhances the reliability and sustainability of the system, and is applicable to mining operation scenarios under various complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of an upward vehicle hitting the buffer retaining wall; Figure 2 It is a schematic diagram of a downward vehicle hitting the buffer retaining wall; Figure 3 It is a schematic diagram of the height dimension limit of the buffer retaining wall; Figure 4 It is a schematic diagram of the connection of adjacent negative Poisson's ratio unit cell arrays; Figure 5 It is a schematic diagram of the structure of the monitoring system; Figure 6 It is a schematic diagram of the method for determining the impact expected area.

[0018] In the figures: 1 is the ramp; 2 is the buffer platform; 3 is the second anti-collision module; 4 is the third anti-collision module; 5 is the vehicle; 6 is the slope; 7 is the negative Poisson's ratio unit cell array; 8 is the cable tie; 9 is the solar panel; 10 is the storage battery; 11 is the data acquisition module; 12 is the wireless transmission module; 13 is the accelerometer; 14 is the tilt sensor; 15 is the temperature sensor; 16 is the connection wire; 17 is the first boundary area; 18 is the second boundary area; 19 is the ramp retaining wall; 20 is the speed acquisition module; 21 is the integration of the speed change determination module, vehicle determination module and area determination module. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. However, those skilled in the art should clearly understand that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits and methods are omitted to avoid unnecessary details from interfering with the description of the present invention.

[0020] The present invention discloses a method for determining the impact expected area of a buffer retaining wall, which includes the following steps: Determine the first speed of the vehicle 5 reaching the first boundary area 17 and the second speed reaching the second boundary area 18 in sequence; both the first boundary area 17 and the second boundary area 18 are areas between the vehicle 5 and the buffer retaining wall, and their shapes and sizes are specified by those skilled in the art themselves, and the first boundary area 17 is closer to the buffer retaining wall.

[0021] In Embodiment 1, the first boundary region 17 is a rectangular region that is 5 m away from the buffer retaining wall. Its width is the same as the road surface width, and its length is 1 m. The second boundary region 18 is a rectangular region that is 10 m away from the buffer retaining wall, and its size range is the same as that of the first boundary region 17.

[0022] Determine the speed change information based on the first speed and the second speed; record the time when the vehicle 5 enters from the first boundary region 17 to the second boundary region 18 as the first time, and the speed change information is the ratio of the speed difference between the first speed and the second speed to the first time.

[0023] Determine whether the vehicle 5 hits the buffer retaining wall based on the first speed and the speed change information; If so, determine the impact expected area on the buffer retaining wall according to the driving direction of the vehicle 5 in the first boundary region 17.

[0024] Preferably, determining whether the vehicle 5 hits the buffer retaining wall according to the first speed and the speed change information is specifically as follows: Determine the braking information of the vehicle 5 based on the first speed and the speed change information; Determine whether the vehicle 5 hits the buffer retaining wall according to the braking information of the vehicle 5.

[0025] Specifically, according to the first speed and the speed change information, combined with the acceleration displacement formula, the driving distance required for the vehicle 5 to stop can be obtained. Compare the driving distance with the first preset threshold. If the driving distance is greater than the first preset threshold, it is determined that the vehicle 5 hits the buffer retaining wall. The first preset threshold is preset by those skilled in the art according to the actual situation. Preferably, in Embodiment 1, the first preset threshold is equal to the distance from the first boundary region 17 to the buffer retaining wall.

[0026] In other embodiments, determining whether the vehicle 5 hits the buffer retaining wall according to the first speed and the speed change information is specifically as follows: Determine whether the vehicle 5 is an accelerating vehicle or a constant-speed vehicle according to the speed change information; If so, compare the first speed of the accelerating vehicle or the constant-speed vehicle with the second preset threshold. If it is greater than the second preset threshold, it is determined that the accelerating vehicle or the constant-speed vehicle will hit the buffer retaining wall. The basis for judging whether the vehicle 5 hits the retaining wall in this embodiment is that when the first speed of the vehicle 5 reaches the first boundary region 17 is too large (exceeding the second preset threshold) and it is still accelerating or moving at a constant speed, it can be determined that the vehicle 5 has lost control, and then the vehicle 5 will hit the buffer retaining wall under the action of inertia subsequently.

[0027] Preferably, determining the impact expected area on the buffer retaining wall according to the driving direction of the vehicle 5 in the first boundary region 17 is specifically as follows: Determine the driving trajectory of the vehicle 5 within the first boundary area 17 according to the driving direction; determine the impact expected area on the buffer retaining wall according to the driving trajectory.

[0028] Specifically, the present invention takes the position point where the vehicle 5 reaches the first boundary area 17 as the starting point, and draws a straight line according to the vector extension line of the driving direction, and takes this straight line as the driving trajectory of the vehicle 5 within the first boundary area 17. The intersection area of this driving trajectory and the buffer retaining wall is the impact expected area. The basis for the present invention to determine the driving trajectory and the impact expected area according to the driving trajectory is that when the vehicle 5 is determined to hit the buffer retaining wall, it can be considered that it has lost control and will maintain its original direction of travel due to inertia until it hits the buffer retaining wall.

[0029] The present invention also discloses a buffer retaining wall impact expected area determination system, including: A speed acquisition module 20, which is used to determine the first speed of the vehicle 5 reaching the first boundary area 17 in sequence and the second speed of reaching the second boundary area 18; A speed change determination module, which is used to determine speed change information according to the first speed and the second speed; A vehicle determination module, which is used to determine whether the vehicle 5 hits the buffer retaining wall according to the first speed and the speed change information; An area determination module, which is used to determine the impact expected area on the buffer retaining wall according to the driving direction of the vehicle 5 within the first boundary area 17 after determining that the vehicle 5 hits the buffer retaining wall.

[0030] The present invention also discloses a buffer retaining wall, including: a retaining wall system, a buffer retaining wall impact expected area determination system, and a control system; The buffer retaining wall impact expected area determination system and the control system are connected and are both arranged on the retaining wall system; On the side of the retaining wall system facing the vehicle 5, there are a plurality of connected first anti-collision modules; in one embodiment, the first anti-collision module is an airbag, and the side of the retaining wall system facing the vehicle 5 is divided into a plurality of continuous blocks, and an airbag is correspondingly arranged in each block.

[0031] The buffer retaining wall impact expected area determination system is used to determine the impact expected area on the buffer retaining wall; The control system is connected to each first anti-collision module and is used to control the start of the first anti-collision module corresponding to the impact expected area while determining the impact expected area.

[0032] Preferably, the retaining wall system further includes a second anti-collision module 3 and a third anti-collision module 4 arranged in sequence along the direction away from the first anti-collision module; Both the second anti-collision module 3 and the third anti-collision module 4 are arranged on the side of the first anti-collision module away from the vehicle; The first anti-collision module is used to provide a flexible wrapping for the vehicle 5 and reduce the damage suffered by the vehicle 5 at the moment of impact; The second anti-collision module 3 is connected to the first anti-collision module and is used to disperse and absorb the impact force; The third anti-collision module 4 is used to provide support for the first anti-collision module and the second anti-collision module 3 and consume the remaining impact force to prevent the vehicle 5 from rolling down the slope 6 due to excessive impact force.

[0033] Preferably, the second anti-collision module 3 includes: a plurality of negative Poisson's ratio unit cell arrays 7 arranged at intervals on the side of the first anti-collision module away from the vehicle 5; as Figure 4 shown, adjacent negative Poisson's ratio unit cell arrays 7 are connected by iron wires or cable ties 8, and the interval between adjacent negative Poisson's ratio unit cell arrays 7 is less than 20 cm.

[0034] In the present invention, the negative Poisson's ratio unit cell array 7 is introduced, making full use of the mechanical properties of the negative Poisson's ratio structure, which has good impact resistance, fracture resistance, energy absorption and vibration isolation performance. When the negative Poisson's ratio unit cell array 7 is arranged on the buffer platform 2, when the vehicle 5 has a collision accident, the negative Poisson's ratio unit cell array 7 can withstand the impact force from the vehicle 5 and disperse the impact force over a larger area through deformation, reducing local stress concentration and improving the durability and stability of the buffer retaining wall.

[0035] Compared with the traditional rigid buffer retaining wall, the present invention can greatly reduce the damage degree of the vehicle 5 during the impact process, protect the safety of the driver, and at the same time ensure the integrity of the mechanical components and parts of the vehicle 5 to the greatest extent, reduce the subsequent maintenance workload, and reduce the risk of casualties caused by instantaneous impact.

[0036] Each negative Poisson's ratio unit cell array 7 includes a plurality of negative Poisson's ratio unit cells arranged periodically in the same plane; The cross-section of the negative Poisson's ratio unit cell is any one of a hexagon, a rhombus, a triangle or a circle.

[0037] Preferably, the buffer retaining wall further includes a monitoring system; The monitoring system, the buffer retaining wall impact expected area determination system and the control system are arranged side by side on the retaining wall system and are used to monitor the impact parameters of the retaining wall system and feedback them to the terminal safety warning center; in one embodiment, the monitoring system, the buffer retaining wall impact expected area determination system and the control system are all arranged on the top of the third anti-collision module 4, and the buffer retaining wall impact expected area determination system is located at any end of the top of the third anti-collision module 4.

[0038] As Figure 5As shown, the monitoring system includes at least one of an inclination monitoring module, a vibration intensity monitoring module, and a temperature change monitoring module. Specifically, the inclination monitoring module is the tilt sensor 14, the vibration intensity monitoring module is the accelerometer 13, and the temperature change monitoring module is the temperature sensor 15; Furthermore, the monitoring system further includes a data acquisition module 11 and a wireless transmission module 12 that are electrically connected or communicatively connected through a connection line 16; the data acquisition module 11 is respectively connected to the inclination monitoring module, the vibration intensity monitoring module, and the temperature change monitoring module.

[0039] The data acquisition module 11 uses a low-power microcontroller to collect sensor data in real time and perform preliminary processing; the wireless transmission module 12 feeds back the data to the terminal safety warning center through wireless communication technologies such as Wi-Fi and Bluetooth.

[0040] The present invention integrates an advanced monitoring system, which can monitor impact parameters such as the vibration intensity, tilt angle, and temperature change of the buffer retaining wall in real time. After the impact parameters are collected and preliminarily processed by a low-power microcontroller, they are instantaneously fed back to the terminal safety warning center through wireless communication technologies such as Wi-Fi and Bluetooth, realizing remote monitoring and warning of the state of the buffer retaining wall, not only improving the efficiency of safety management, but also providing a valuable time window for quickly taking rescue measures.

[0041] The third anti-collision module 4 is an earth pile or a crushed stone pile piled on the side of the second anti-collision module 3 away from the vehicle 5, and the earth pile or the crushed stone pile is tamped by construction machinery.

[0042] Preferably, the internal pores of the negative Poisson's ratio unit cell are of a gradient structure, and the size of the internal pores gradually increases in the direction close to the vehicle 5.

[0043] In one embodiment, the cross-section of each negative Poisson's ratio unit cell is a regular hexagon, which is beneficial to the transfer of loads between adjacent negative Poisson's ratio unit cells during impact. Each negative Poisson's ratio unit cell is a gradient pore structure, and the porosity near the impact surface gradually increases from 50% to 80%. The increase or decrease of the porosity can be achieved by increasing the pore size or thickening the wall thickness of the negative Poisson's ratio unit cell.

[0044] Preferably, the side length of the regular hexagon negative Poisson's ratio unit cell is 1.5 cm. Adjacent regular hexagon negative Poisson's ratio unit cells are bonded by polyethylene (PE) or polypropylene (PP). The material of the negative Poisson's ratio unit cell is selected from materials with high strength, good toughness, and low cost such as polyvinyl chloride or polyester resin.

[0045] Preferably, the buffer retaining wall further includes a power supply system; The power supply system is respectively connected to the buffer retaining wall impact expected area determination system, the control system, and the monitoring system.

[0046] The power supply system includes a solar panel 9 and a storage battery 10.

[0047] The present invention also discloses a construction method for a buffer retaining wall, including: (1) As shown in Figure 1 and Figure 2 , the buffer platform 2 is located at the end of the ramp 1, and the length of the boundary line between the buffer platform 2 and the ground is recorded as the width of the buffer platform 2; further, as shown in Figure 6 , a ramp retaining wall 19 is also provided on one side of the ramp 1. In the present invention, a grader or an excavator is used to clean the loose stones on the buffer platform 2, level the ground, and then a foundation pit with a depth of 0.3 m to 0.5 m is excavated at the preset position for placing the second anti-collision module 3, and the bottom of the foundation pit is leveled; (2) Place the pre-customized negative Poisson's ratio unit cell array 7 into the foundation pit, as shown in Figure 3 . H is the height of the first point on the truck bed from the ground. The first point is located at the contact surface between the outer edge of the rear wheel of the vehicle 5 and the negative Poisson's ratio unit cell array 7, and this contact surface is perpendicular to the ground. The height of the negative Poisson's ratio unit cell array 7 exposed above the ground is less than or equal to H, so as to prevent the buffer retaining wall from lifting the truck bed of the vehicle 5 in case of the vehicle 5 sliding backward; (3) A standardized interface design is adopted between adjacent negative Poisson's ratio unit cells. After a single negative Poisson's ratio unit cell is damaged, it can be quickly replaced without overall demolition. Further, after all the negative Poisson's ratio unit cell arrays 7 are laid and installed, a plurality of negative Poisson's ratio unit cell arrays 7 are connected into a whole with iron wires or ties 8 to form a second anti-collision module 3 with an energy absorption and buffering function. The height of the second anti-collision module 3 is H + (0.3 m to 0.5 m), the width is the same as the width of the buffer platform 2, and the thickness is 1.5 m to 2 m; (4) After the construction operation of the second anti-collision module 3 is completed, use an excavator to tamp the root of the second anti-collision module 3; (5) Install a buffer retaining wall impact expected area determination system, a control system, and a monitoring system on the top of the third anti-collision module 4, and test whether the installed systems work properly, and monitor the states of the vehicle 5 and the buffer retaining wall in real time. As shown in Figure 6 , in one embodiment, the integration 21 of the rapid change determination module, the vehicle determination module, and the area determination module is arranged on the third anti-collision module 4; (6) Stack an earth pile or a crushed stone pile behind the second anti-collision module 3. Its dimensions are mainly as follows: the top thickness is 1 m to 2 m, the bottom thickness is 2 m to 3.5 m, and it is 0.5 m to 1.5 m higher than the second anti-collision module 3. The width of the earth pile or the crushed stone pile is the same as the width of the second anti-collision module 3; (7)Divide the side of the second anti-collision module 3 facing the vehicle 5 into a plurality of continuous blocks. In each block, arrange airbags that match the size of the block. The airbags are fixed by adhesion or using a hot melt gun on the negative Poisson's ratio unit cell array 7. Specifically, the high-strength adhesive can be epoxy resin or polyurethane glue. Fixing with a hot melt gun specifically means: using a hot melt gun to apply hot melt adhesive on the contact surface between the airbag and the negative Poisson's ratio unit cell array 7, quickly pressing the airbag and the negative Poisson's ratio unit cell array 7 together, and forming a firm connection after cooling; (8)Furthermore, in order to avoid the weakening effect of sunlight irradiation or weathering on the present invention and extend the service life of the present invention as much as possible, after the laying and installation are completed, the present invention also lays a simple geotextile on the airbags, the second anti-collision module 3 and the earth / muck pile, and sprays warning signs with paint or other materials.

[0048] Compared with the prior art, the present invention has the following beneficial effects: (1)The present invention first judges whether the vehicle hits the buffer retaining wall according to the speed change of the vehicle. After judging that the vehicle hits the buffer retaining wall, it predicts the impact area according to its driving direction, so as to start the protection targeted subsequently, significantly improving the protection efficiency and reducing the waste of energy; (2)By integrating a variety of monitoring modules (such as inclination monitoring, vibration intensity monitoring and temperature change monitoring), the present invention can timely feedback the impact parameters to the safety terminal after an accident, facilitating the rapid adoption of rescue measures and improving the timeliness and accuracy of accident response; (3)Through the multi-level anti-collision module design, the present invention can effectively disperse and absorb the impact force, reduce the damage suffered by the vehicle at the moment of impact, and at the same time consume the remaining impact force, enhancing the overall protection ability of the retaining wall; (4)By using the negative Poisson's ratio unit cell array as the core structure of the second anti-collision module and combining with the gradient pore design, the present invention further optimizes the absorption and dispersion effect of the impact force and improves the anti-impact performance of the buffer retaining wall; (5)By closely combining the buffer retaining wall impact expected area determination system with the control system, the present invention realizes intelligent protection, can start the protection strategy when the impact occurs, and improves the active protection ability of the buffer retaining wall; (6)By setting up a power supply system, the present invention ensures the stable operation of each functional module of the buffer retaining wall, enhances the reliability and sustainability of the system, and is applicable to the mine operation scenarios under various complex environments.

[0049] As described above, these are only several embodiments of the present application and do not impose any form of limitation on the present application. Although the present application is disclosed above with preferred embodiments, it is not intended to limit the present application. Any person skilled in the relevant art can make some changes or modifications within the scope of the technical solution of the present application by using the disclosed technical content, which are equivalent to equivalent embodiments and all fall within the scope of the technical solution.

Claims

1. A method for determining the expected area of impact of a buffer retaining wall, characterized in that, It includes the following steps: Determine the first speed at which the vehicle arrives at the first boundary area in sequence and the second speed at which it arrives at the second boundary area; Determine the speed change information according to the first speed and the second speed; Determine whether the vehicle hits the buffer wall according to the first speed and the speed change information; If so, determine the impact expected area on the buffer wall according to the driving direction of the vehicle in the first boundary area.

2. The method for determining the expected impact area of the buffer retaining wall according to claim 1, wherein Determine whether the vehicle hits the buffer wall according to the first speed and the speed change information, specifically: Determine the braking information of the vehicle according to the first speed and the speed change information; Determine whether the vehicle hits the buffer wall according to the braking information of the vehicle.

3. The method for determining the expected impact area of the buffer retaining wall according to claim 1, wherein Determine the impact expected area on the buffer wall according to the driving direction of the vehicle in the first boundary area, specifically: Determine the driving trajectory of the vehicle in the first boundary area according to the driving direction; Determine the impact expected area on the buffer wall according to the driving trajectory.

4. A buffer retaining wall impact desired area determination system, characterized in that, It includes: A speed acquisition module for determining the first speed at which the vehicle arrives at the first boundary area in sequence and the second speed at which it arrives at the second boundary area; A speed change determination module for determining the speed change information according to the first speed and the second speed; A vehicle determination module for determining whether the vehicle hits the buffer wall according to the first speed and the speed change information; An area determination module for determining the impact expected area on the buffer wall according to the driving direction of the vehicle in the first boundary area after determining that the vehicle hits the buffer wall.

5. A buffer retaining wall, characterized in that, Apply the buffer wall impact expected area determination system according to claim 4, where the buffer wall includes: a wall system, a buffer wall impact expected area determination system, and a control system; The buffer wall impact expected area determination system is connected to the control system, and both are arranged on the wall system; On the side of the wall system facing the vehicle, there are a plurality of connected first anti-collision modules; The buffer wall impact expected area determination system is used to determine the impact expected area on the buffer wall; The control system is connected to each first anti-collision module, and is used to control the start of the first anti-collision module corresponding to the impact expected area while determining the impact expected area.

6. The buffer retaining wall according to claim 5, wherein, It further includes a monitoring system; The monitoring system, the buffer wall impact expected area determination system, and the control system are arranged side by side on the wall system, and are used to monitor the impact parameters of the wall system and feedback them to the terminal safety warning center; The monitoring system includes at least one of an inclination angle monitoring module, a vibration intensity monitoring module, and a temperature change monitoring module.

7. The buffer retaining wall according to claim 5, characterized in that, The wall system further includes a second anti-collision module and a third anti-collision module arranged in sequence along the direction away from the first anti-collision module; The second anti-collision module and the third anti-collision module are both arranged on the side of the first anti-collision module away from the vehicle; The first anti-collision module is used to provide flexible wrapping for the vehicle to reduce the damage suffered by the vehicle at the moment of impact; The second anti-collision module is connected to the first anti-collision module and is used to disperse and absorb the impact force; The third anti-collision module is used to provide support for the first anti-collision module and the second anti-collision module and consume the remaining impact force.

8. The buffer retaining wall according to claim 7, wherein, The second anti-collision module includes: a plurality of auxetic unit cell arrays arranged at intervals on a side of the first anti-collision module away from the vehicle; Each auxetic unit cell array includes a plurality of auxetic unit cells arranged periodically in the same plane; The cross-section of the auxetic unit cell is any one of a hexagon, a rhombus, and a triangle.

9. The buffer retaining wall according to claim 8, wherein, The internal pores of the auxetic unit cell are of a gradient structure, and the size of the internal pores gradually increases in a direction close to the vehicle.

10. The buffer retaining wall according to claim 6, characterized in that, It further includes a power supply system; The power supply system is respectively connected to the buffer wall impact desired area determination system, the control system, and the monitoring system.

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