Anti-collision alarm device and alarm method

Abstract

The invention discloses an anti-collision alarm device and an alarm method. The alarm device comprises an anti-collision body, an anti-collision buffer device, a first-stage early warning device, a second-stage early warning device and a third-stage early warning device, the primary early warning device comprises a radar mechanism and a sound early warning mechanism; the secondary early warning device comprises an early warning support frame, a pressure sensor, a flash early warning mechanism and a vibration early warning mechanism; the third-level early warning device comprises an impact sensor and a buffering folding supporting mechanism. According to the alarm method, the radar mechanism is used for triggering the sound early warning mechanism to carry out sound prompting; the pressure sensor is used for triggering the flash early warning mechanism to give out hard light flash warning and synchronously triggering the vibration early warning mechanism to give out mechanical vibration reminding. The impact sensor is used for triggering the buffering folding supporting mechanism to be unfolded so as to enhance the structural strength of the anti-collision buffering device, three-level active protection is formed, the dynamic response of long-distance early warning, contact warning and collision buffering is achieved, and the early warning timeliness and stability are improved.

Description

Technical Field

[0001] The present application relates to the technical field of anti-collision vehicle alarm devices, and in particular to an anti-collision vehicle alarm device and an alarm method. Background Art

[0002] As an important traffic safety facility widely used in road construction, accident handling and other scenarios, anti-collision vehicles effectively ensure traffic safety by providing collision buffers for workers and vehicles. In recent years, with the acceleration of urbanization and the surge in traffic volume, the functionality and safety requirements of anti-collision vehicles have increased significantly. However, in the existing technology, the warning system of anti-collision vehicles mostly adopts a single warning mode, which only monitors the environment through on-board radars, cameras and other equipment and sends warnings to the driver when potential dangers are identified. This independently operated warning mechanism has obvious limitations when dealing with complex traffic environments: not only does it lack multi-dimensional perception coordination, it is difficult to capture rapidly changing road risks in a timely manner, and when encountering special working conditions such as collisions on inclined roads, the monitoring blind spots of a single sensor are prone to cause warning delays, resulting in a decrease in the overall protection performance of the anti-collision vehicle, making it difficult to meet safety protection needs. Summary of the invention

[0003] In order to improve the defects that the early warning system of anti-collision vehicles mostly adopts a single early warning mode, lacks multi-dimensional perception coordination, and is difficult to meet the safety protection needs, the present application provides an alarm device and an alarm method for an anti-collision vehicle.

[0004] The present application provides an anti-collision vehicle alarm device and an alarm method using the following technical solutions: An anti-collision vehicle alarm device comprises an anti-collision vehicle body, an anti-collision buffer device connected to the rear end of the anti-collision vehicle body, a first-level warning device, a second-level warning device, and a third-level warning device connected to the anti-collision buffer device; The first-level warning device includes a radar mechanism connected to the rear end of the anti-collision buffer device, and a sound warning mechanism connected to the front end of the anti-collision buffer device; The secondary warning device includes a warning support frame connected to the rear end of the anti-collision buffer device and extending in a direction away from the anti-collision buffer device, a pressure sensor connected to the warning support frame, a flash warning mechanism connected to the warning support frame and electrically connected to the pressure sensor, and a vibration warning mechanism connected to the warning support frame and electrically connected to the pressure sensor; The three-level warning device includes an impact sensor connected to the rear end of the anti-collision buffer device, and a buffer folding support mechanism inserted in the anti-collision buffer device and electrically connected to the impact sensor.

[0005] By adopting the above technical solution, when the radar mechanism detects that the rear vehicle is approaching, the sound warning mechanism is triggered to give a sound prompt to achieve a first-level warning; if the vehicle continues to approach and touches the warning support frame, the pressure sensor triggers the flash warning mechanism to issue a strong light flashing warning, and simultaneously triggers the vibration warning mechanism to issue a mechanical vibration reminder to achieve a second-level warning; when the collision impact force reaches a preset threshold, the impact sensor triggers the buffer folding support mechanism to unfold to enhance the structural strength of the anti-collision buffer device, forming a third-level active protection; This application realizes the dynamic response of "long-distance warning-contact warning-collision buffering", improving the timeliness and stability of the warning; the extended design of the warning support frame expands the detection range of the pressure sensor, combined with the tactile feedback of the vibration warning mechanism, effectively covering the inclined road collision scenario; the buffer folding support mechanism quickly unfolds after the impact sensor is triggered to form an energy-absorbing structure, reducing the deformation risk of the anti-collision vehicle body; this application improves the active safety and impact resistance of the anti-collision vehicle in complex traffic environments through a multi-modal protection mechanism of sound, light, vibration and mechanical buffering.

[0006] Preferably, the warning support frame includes a first extension support frame located on one side of the anti-collision buffer device, a second extension support frame arranged on the other side of the anti-collision buffer device and parallel to the first extension support frame, and a vibration support frame arranged between the first extension support frame and the second extension support frame and arranged in an array in a direction away from the anti-collision buffer device, and the vibration warning mechanism is arranged on the vibration support frame.

[0007] By adopting the above technical solution, the warning support frame is distributed in parallel on both sides of the anti-collision buffer device through the first extension support frame and the second extension support frame to form a symmetrical support structure. When the vehicle approaches, the collision contact monitoring range is expanded by extending the layout. When the rear vehicle presses the vibration support frame, the pressure sensor is triggered to generate an electrical signal, and the vibration warning mechanism is synchronously driven to generate high-frequency mechanical vibration along the vibration support frame to form a tactile perception alarm, so that the mechanical vibration signal is directly transmitted to the vehicle, and the warning penetration is enhanced; at the same time, the array-arranged vibration support frame disperses the impact energy through multiple nodes to reduce local stress concentration; This application achieves pressure dispersion and precise sensing by using a multi-level support structure through the coordinated layout of the first and second extended support frames on both sides and the array-type vibration support frame, while expanding the collision contact monitoring area. Combined with the distributed setting of the vibration warning mechanism on the vibration support frame, the tactile warning intensity is enhanced, especially for collision scenarios on inclined roads, to ensure the reliability and sensitivity of the secondary warning system under complex impacts.

[0008] Preferably, the vibration support frame includes a support frame body, a warning detection slope surface arranged on the support frame body, and a warning vibration plane arranged on the support frame body and located on one side of the warning detection slope surface; the pressure sensor is connected to the warning detection slope surface, the vibration warning mechanism is arranged on the warning vibration plane and electrically connected to the pressure sensor, the warning vibration plane is provided with a vibration fixing hole arranged along the length direction of the support frame body, and the vibration warning mechanism is inserted into the vibration fixing hole.

[0009] By adopting the above technical solution, when the vehicle contacts the warning detection slope, the pressure sensor detects the pressure signal in real time and triggers the vibration warning mechanism to start. The vibration warning mechanism generates high-frequency mechanical vibration through the vibration fixing holes on the warning vibration plane and transmits tactile warning to the car cab through the car tires; the warning detection slope and the inclined surface design of this application are used to guide the collision force to disperse along the slope direction, reducing the local stress concentration of the support frame body; the vibration warning mechanism is embedded in the warning vibration plane through the vibration fixing holes to ensure that the vibration energy is evenly transmitted along the length direction of the support frame body to avoid the vibration warning mechanism from falling off or shifting; the physical isolation design of the warning detection slope (pressure sensing) and the warning vibration slope (tactile feedback) realizes the coordinated operation of collision detection and warning response and shortens the signal transmission delay; the array arrangement of the vibration fixing holes optimizes the vibration wave transmission path, expands the tactile warning coverage area to the full length of the support frame body, and improves the warning recognition rate of the car collision scene.

[0010] Preferably, the first extension support frame and the second extension support frame each include an extension support body and an inclined guide slope surface provided at the end of the extension support body; The extension bracket body is provided with flash fixing grooves arranged in an array along the length direction of the extension bracket body, and the extension bracket body is also provided with a flash warning slope located in the flash fixing grooves; the flash warning mechanism is arranged on the flash warning slope and is electrically connected to the pressure sensor.

[0011] By adopting the above technical solution, when the car contacts the warning detection slope, the pressure sensor triggers the flash warning mechanism to project a strong light warning on the flash warning slope at an angle facing the car cab; the inclined guide slope converts the collision impact force into a component force along the axial direction of the extension bracket body through the inclined structure, thereby reducing the risk of damage to the extension bracket body caused by the impact; the array-distributed flash fixing grooves make the flash warning mechanism evenly arranged along the length direction of the extension bracket body, and cooperate with the inclined reflective surface design of the flash warning slope to achieve light signal coverage of the car cab, thereby improving the effect of the flash warning.

[0012] Preferably, the anti-collision buffer device comprises an anti-collision bag shell connected to the rear end of the anti-collision vehicle body, and an anti-collision buffer bag inserted in the anti-collision bag shell; The impact sensor is connected to the anti-collision bag shell and is located between the secondary warning device and the anti-collision buffer bag; the buffer folding support mechanism is inserted into the anti-collision bag shell and is located between the anti-collision vehicle body and the anti-collision buffer bag.

[0013] By adopting the above technical scheme, when a car collides with the anti-collision bag shell, the impact sensor detects the deformation pressure of the anti-collision bag shell in real time and triggers the buffer folding support mechanism to unfold towards the anti-collision vehicle body to perform multi-stage energy absorption; the impact sensor is arranged between the secondary warning device and the anti-collision buffer bag, and can accurately distinguish the contact pressure in the warning stage from the impact load in the collision stage to avoid false triggering of the buffer folding support mechanism; the buffer folding support mechanism unfolds in a direction away from the anti-collision vehicle body after the impact sensor is triggered to dynamically reinforce the buffer support force; the coordinated deformation of the folding support mechanism and the anti-collision buffer bag forms a gradient energy absorption path, so that the collision energy is dissipated step by step through the deformation of the anti-collision bag shell, the unfolding resistance of the folding mechanism and the plastic deformation of the anti-collision buffer bag, thereby maximizing the collision deceleration time.

[0014] Preferably, the buffer folding support mechanism includes a buffer support seat connected to the two side walls of the anti-collision bag shell, a hinged buffer frame connected to the anti-collision bag shell and located between the two buffer support seats, and a buffer drive assembly connected to the buffer support seat and used to drive the hinged buffer frame to unfold or fold; the buffer drive assembly is electrically connected to the impact sensor.

[0015] By adopting the above technical solution, when the impact sensor detects the collision impact force, the buffer drive assembly is triggered, and the buffer drive assembly drives the articulated buffer frame to unfold from a folded state to a direction away from the buffer support seats on both sides to form a support structure; the buffer support seats are symmetrically distributed on the two side walls of the anti-collision bag shell, and the overall torsional stiffness of the buffer drive assembly after unfolding is improved through the rigid connection with the anti-collision bag shell; the articulated buffer frame forms a gradient energy absorption buffer through the reverse action of the collision impact force through multi-stage dynamic unfolding resistance, thereby improving the early warning linkage and buffering effect.

[0016] Preferably, the articulated buffer frame includes an articulated support rod fixedly connected to the upper and lower side walls of the anti-collision bag shell, a first articulated rod sleeved on the outer side wall of the articulated support rod and rotatably connected to the articulated support rod, and a second articulated rod sleeved on the outer side wall of the articulated support rod and rotatably connected to the articulated support rod; the first articulated rod and the second articulated rod are cross-arranged and stacked in sequence along the length direction of the articulated support rod.

[0017] By adopting the above technical scheme, when the buffer drive assembly is started, the first hinged rod and the second hinged rod rotate synchronously around the hinged support rod and unfold; the hinged support rod is symmetrically fixed to the upper and lower side walls of the anti-collision bag shell, ensuring that the first hinged rod and the second hinged rod are evenly stressed when unfolded, avoiding unilateral deflection and causing structural instability; the cross-stacked first hinged rod and the second hinged rod form an "X"-shaped multi-directional support node after unfolding, and the bending strength of the structure is improved through mutual constraints between the rods; in the folded state, the first hinged rod and the second hinged rod are close to the hinged support rod, saving the internal space of the anti-collision bag shell, and after unfolding, the multi-node bracket and the anti-collision buffer bag together form a composite energy absorption path, thereby improving the buffering performance.

[0018] Preferably, the first articulated rod and the second articulated rod each include an articulated rod body, a fixed connecting plate arranged at one end of the anti-collision vehicle body and connected to the plurality of articulated rod bodies, and a buffer support baffle arranged at the other end of the anti-collision vehicle body and fixedly connected to the plurality of articulated rod bodies.

[0019] By adopting the above technical scheme, when the articulated rod body rotates and unfolds around the articulated support rod, the fixed connecting plate locks the multiple articulated rod bodies into overall synchronous movement, and the buffer support baffle abuts against the surface of the impact vehicle as it unfolds to form a distributed support; the fixed connecting plate enhances the overall rigidity of the articulated rod group through a multi-rod parallel structure to prevent stress concentration caused by asynchronous unfolding of a single articulated rod body; the large-area plane design of the buffer support baffle forms surface contact with the impact vehicle after unfolding, disperses the impact load through friction and support reaction force, and reduces the risk of bending and rectangular deformation of the articulated rod body; the articulated rod body is constrained at both ends by the fixed connecting plate and the buffer support baffle, forming a bidirectional compressive support structure after unfolding, thereby improving the bending strength; in the folded state, the buffer support baffle is close to the fixed connecting plate, compressing the storage space, and ensuring the miniaturization and rapid response characteristics of the anti-collision buffer device.

[0020] Preferably, the buffer drive assembly includes a driving component body connected to the buffer support seat, and a guide push-pull rod connected to the output end of the driving component body and movably inserted in the hinged rod body; push-pull sliding grooves are correspondingly provided on the two hinged rod bodies close to the driving component body, and the push-pull sliding grooves are arranged along the length direction of the hinged rod body, and the two ends of the guide push-pull rod are respectively movably inserted in the two push-pull sliding grooves.

[0021] By adopting the above technical solution, when the impact sensor triggers the start of the driving component body, the guide push-pull rod slides in a straight line along the push-pull sliding groove in the hinged rod body, pushing the hinged rods on both sides to simultaneously unfold to the supported locking position; the linear guide design of the push-pull sliding groove limits the movement trajectory of the guide push-pull rod, ensuring that the unfolding angles of multiple hinged rod bodies are consistent, avoiding structural jamming due to differences in deflection angles; both ends of the guide push-pull rod are embedded in the push-pull sliding groove to form a bilateral force transmission path, so that the output thrust of the driving component body is evenly distributed to the hinged rod bodies on both sides, thereby improving the unfolding speed and force transmission efficiency; the rigid connection structure between the driving component body and the buffer support seat disperses the driving reaction force to the anti-collision package shell through the support seat, reducing the risk of wear caused by the vibration of the buffer drive component itself.

[0022] Preferably, a method for preventing a vehicle from being hit by a collision comprises a device for preventing a vehicle from being hit by a collision, and further comprises the following steps: S1: When the vehicle reaches the preset distance detected by the radar mechanism, the radar mechanism triggers the sound warning mechanism to issue a sound alarm to perform a first-level warning; S2: When the vehicle continues to move towards the direction of the anti-collision vehicle body, the pressure sensor is pressed down to trigger the flash warning mechanism to emit high-frequency flashes facing the vehicle, and the pressure sensor simultaneously triggers the vibration warning mechanism to emit high-frequency vibrations to perform a secondary warning; S3: When the vehicle hits the impact sensor on the anti-collision buffer device, the impact sensor triggers the buffer folding support mechanism to unfold in a direction away from the anti-collision vehicle body to perform a third-level warning.

[0023] By adopting the above technical solution, the radar mechanism detects the rear vehicle at a preset distance and triggers the sound warning mechanism to issue a high-frequency sound wave warning; when the vehicle continues to approach and contact the warning support frame, the pressure sensor is compressed to trigger the flash warning mechanism to project a high-frequency strong light and synchronously start the vibration warning mechanism to generate mechanical vibration, forming a sound, light, and tactile multi-modal warning; when the vehicle hits the anti-collision buffer device, the impact sensor detects the preset threshold of the impact force in real time and drives the buffer folding support mechanism to unfold to form a rigid support frame, and simultaneously compresses the anti-collision buffer bag for energy absorption; the present application constructs a three-level response logic of "remote warning-contact warning-active buffering", and the warning response time is shortened by the signal triggering of the radar mechanism, the pressure sensor, and the impact sensor; the dual signal synchronous output of the pressure sensor and the vibration warning mechanism and the flash warning mechanism solves the warning failure risk of a single warning mode in a rainy and foggy environment or a driver distracted scene; the design of the buffer folding support mechanism unfolding in the direction away from the vehicle body offsets the collision kinetic energy through the unfolding reaction force, and dissipates the remaining energy step by step in combination with the plastic deformation of the anti-collision buffer bag; the dynamic coordination of multi-level warning signals and mechanical buffering actions improves the protection efficiency.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. An anti-collision vehicle alarm device, when the radar mechanism detects the approach of the rear vehicle, the sound warning mechanism is triggered to give a sound prompt to achieve a first-level warning; if the vehicle continues to approach and touches the warning support frame, the pressure sensor triggers the flash warning mechanism to issue a strong light flashing warning, and simultaneously triggers the vibration warning mechanism to issue a mechanical vibration reminder to achieve a second-level warning; when the collision impact force reaches a preset threshold, the impact sensor triggers the buffer folding support mechanism to unfold to enhance the structural strength of the anti-collision buffer device, forming a third-level active protection; This application realizes the dynamic response of "long-distance warning-contact warning-collision buffering", improving the timeliness and stability of warning; the extended design of the warning support frame expands the detection range of the pressure sensor, and combined with the tactile feedback of the vibration warning mechanism, effectively covers the inclined road collision scene; the buffer folding support mechanism quickly unfolds after the impact sensor is triggered to form an energy-absorbing structure to reduce the deformation risk of the anti-collision vehicle body; this application improves the active safety and impact resistance of the anti-collision vehicle in complex traffic environments through a multi-modal protection mechanism of sound, light, vibration and mechanical buffering; 2. An alarm device for an anti-collision vehicle. When a car collides with an anti-collision bag shell, an impact sensor detects the deformation pressure of the anti-collision bag shell in real time and triggers the buffer folding support mechanism to unfold in the direction of the anti-collision vehicle body to perform multi-stage energy absorption. The impact sensor is arranged between the secondary warning device and the anti-collision buffer bag, and can accurately distinguish the contact pressure in the warning stage from the impact load in the collision stage to avoid false triggering of the buffer folding support mechanism. After the impact sensor is triggered, the buffer folding support mechanism unfolds in a direction away from the anti-collision vehicle body to dynamically reinforce the buffer support force. The coordinated deformation of the folding support mechanism and the anti-collision buffer bag forms a gradient energy absorption path, so that the collision energy is dissipated step by step through the deformation of the anti-collision bag shell, the unfolding resistance of the folding mechanism and the plastic deformation of the anti-collision buffer bag, thereby maximizing the collision deceleration time. 3. An alarm method for anti-collision vehicles, wherein a radar mechanism detects the rear vehicle at a preset distance and triggers a sound warning mechanism to issue a high-frequency sound wave warning; when the vehicle continues to approach and contacts the warning support frame, the pressure sensor is compressed to trigger the flash warning mechanism to project a high-frequency strong light and synchronously start the vibration warning mechanism to generate mechanical vibration, forming a multi-modal warning of sound, light and touch; when the vehicle hits the anti-collision buffer device, the impact sensor detects the preset threshold of the impact force in real time and drives the buffer folding support mechanism to unfold to form a rigid support frame, and synchronously compresses the anti-collision buffer bag for energy absorption; the present application constructs a three-level response logic of "remote warning-contact warning-active buffering", and the warning response time is shortened by the signal triggering of the radar mechanism, the pressure sensor and the impact sensor; the dual signal synchronous output of the pressure sensor and the vibration warning mechanism and the flash warning mechanism solves the warning failure risk of a single warning mode in a rainy and foggy environment or a driver distracted scene; the design of the buffer folding support mechanism unfolding in the direction away from the vehicle body offsets the collision kinetic energy through the unfolding reaction force, and dissipates the remaining energy step by step in combination with the plastic deformation of the anti-collision buffer bag; the dynamic coordination of multi-level warning signals and mechanical buffering actions improves the protection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the exploded structure of an embodiment of an anti-collision vehicle alarm device of the present application.

[0026] Figure 2 It is a three-dimensional structural schematic diagram of a second-level warning device and a third-level warning device of an anti-collision vehicle alarm device embodiment of the present application.

[0027] Figure 3 It is a three-dimensional structural schematic diagram of an early warning support frame of an embodiment of an anti-collision vehicle alarm device of the present application.

[0028] Figure 4 It is a schematic diagram of the top structure of a buffer folding support mechanism of an anti-collision vehicle alarm device embodiment of the present application.

[0029] Figure 5 This is a schematic cross-sectional view of a buffer folding support mechanism of an anti-collision vehicle alarm device embodiment of the present application. Figure 1 .

[0030] Figure 6 This is a schematic cross-sectional view of a buffer folding support mechanism of an anti-collision vehicle alarm device embodiment of the present application. Figure 2 .

[0031] Figure 7 It is a schematic diagram of the steps of an embodiment of an anti-collision vehicle alarm method of the present application.

[0032] Description of reference numerals: 1. Anti-collision vehicle body; 2. Anti-collision buffer device; 21. Anti-collision bag shell; 22. Anti-collision buffer bag; 3. First-level warning device; 31. Radar mechanism; 32. Sound warning mechanism; 4. Secondary warning device; 41. Warning support frame; 42. Pressure sensor; 43. Flash warning mechanism; 44. Vibration warning mechanism; 411. First extension support frame; 412. Second extension support frame; 413. Vibration support frame; 4111. Extension support body; 4112. Inclined guide slope; 4113. Flash fixing groove; 4114. Flash warning slope; 4131. Support frame body; 4132. Warning detection slope; 4133. Warning vibration plane; 4134. Vibration fixing hole; 5. Level 3 warning device; 51. Impact sensor; 52. Buffer folding support mechanism; 521. Buffer support seat; 522. Articulated buffer frame; 523. Buffer drive assembly; 524. Elastic buffer component; 5221. Articulated support rod; 5222. First articulated rod; 5223. Second articulated rod; 5224. Articulated rod body; 5225. Fixed connecting plate; 5226. Buffer support baffle; 5231. Drive component body; 5232. Guide push-pull rod; 5233. Push-pull sliding groove. DETAILED DESCRIPTION

[0033] The following is combined with Figures 1 to 7 This application is described in further detail.

[0034] The present application embodiment discloses an anti-collision vehicle alarm device and an alarm method. Figure 1 , an anti-collision vehicle alarm device, comprising an anti-collision vehicle body 1, an anti-collision buffer device 2 connected to the rear end of the anti-collision vehicle body 1, a first-level warning device 3 connected to the anti-collision buffer device 2, a second-level warning device 4, and a third-level warning device 5; The first-level warning device 3 includes a radar mechanism 31 connected to the rear end of the anti-collision buffer device 2, and a sound warning mechanism 32 connected to the front end of the anti-collision buffer device 2; The secondary warning device 4 includes a warning support frame 41 connected to the rear end of the anti-collision buffer device 2 and extending in a direction away from the anti-collision buffer device 2, a pressure sensor 42 connected to the warning support frame 41, a flash warning mechanism 43 connected to the warning support frame 41 and electrically connected to the pressure sensor 42, and a vibration warning mechanism 44 connected to the warning support frame 41 and electrically connected to the pressure sensor 42; The third-level warning device 5 includes an impact sensor 51 connected to the rear end of the anti-collision buffer device 2 , and a buffer folding support mechanism 52 inserted into the anti-collision buffer device 2 and electrically connected to the impact sensor 51 .

[0035] In the present application, when the radar mechanism 31 detects the approach of the rear vehicle, the sound warning mechanism 32 is triggered to give a sound prompt to achieve a first-level warning; if the vehicle continues to approach and contact the warning support frame 41, the pressure sensor 42 triggers the flash warning mechanism 43 to issue a strong light flashing warning, and simultaneously triggers the vibration warning mechanism 44 to issue a mechanical vibration reminder to achieve a second-level warning; when the collision impact force reaches a preset threshold, the impact sensor 51 triggers the buffer folding support mechanism 52 to unfold to enhance the structural strength of the anti-collision buffer device 2, forming a third-level active protection; The present application realizes the dynamic response of "long-range warning-contact warning-collision buffering" through the three-level coordination of the radar mechanism 31, the pressure sensor 42 and the impact sensor 51, thereby improving the timeliness and stability of the warning. The extended design of the warning support frame 41 expands the detection range of the pressure sensor 42, and combines the tactile feedback of the vibration warning mechanism 44 to effectively cover the inclined road collision scene. The buffer folding support mechanism 52 is quickly unfolded after the impact sensor 51 is triggered to form an energy-absorbing structure to reduce the deformation risk of the anti-collision vehicle body 1. The present application improves the active safety and impact resistance of the anti-collision vehicle in complex traffic environments through a multi-modal protection mechanism of sound, light, vibration and mechanical buffering. The sound warning mechanism 32 of the present application is preferably a speaker or a horn, and the radar mechanism 31 is preferably a millimeter wave radar.

[0036] Furthermore, if Figure 2 As shown, the warning support frame 41 includes a first extension support frame 411 located on one side of the anti-collision buffer device 2, a second extension support frame 412 arranged on the other side of the anti-collision buffer device 2 and parallel to the first extension support frame 411, and a vibration support frame 413 arranged between the first extension support frame 411 and the second extension support frame 412 and arranged in an array in a direction away from the anti-collision buffer device 2, and the vibration warning mechanism 44 is arranged on the vibration support frame 413.

[0037] The warning support frame 41 of the present application is distributed in parallel on both sides of the anti-collision buffer device 2 through the first extension support frame 411 and the second extension support frame 412 to form a symmetrical support structure. When the vehicle approaches, the collision contact monitoring range is expanded by extending the layout. When the rear vehicle presses the vibration support frame 413, the pressure sensor 42 is triggered to generate an electrical signal, and the vibration warning mechanism 44 is synchronously driven to generate high-frequency mechanical vibration along the vibration support frame 413 to form a tactile perception alarm, so that the mechanical vibration signal is directly transmitted to the vehicle, and the warning penetration is enhanced; at the same time, the array-arranged vibration support frame 413 disperses the impact energy through multiple nodes to reduce local stress concentration; The present application utilizes the coordinated layout of the first extension support frame 411 and the second extension support frame 412 on both sides and the array-type vibration support frame 413 to expand the collision contact monitoring area while utilizing the multi-level support structure to achieve pressure dispersion and precise sensing. Combined with the distributed arrangement of the vibration warning mechanism 44 on the vibration support frame 413, the tactile warning intensity is enhanced, especially for the inclined road collision scene, to ensure the reliability and sensitivity of the secondary warning system under complex impacts; The first extension support frame 411 and the second extension support frame 412 are preferably made of flexible plastic to facilitate rolling or folding for storage; the distance between the first extension support frame 411 and the second extension support frame 412 is equal to the lane width, and the vibration warning mechanism 44 is preferably a vibrator.

[0038] Furthermore, if Figure 2 As shown, the vibration support frame 413 includes a support frame body 4131, an early warning detection slope 4132 arranged on the support frame body 4131, and an early warning vibration plane 4133 arranged on the support frame body 4131 and located on one side of the early warning detection slope 4132; the pressure sensor 42 is connected to the early warning detection slope 4132, the vibration early warning mechanism 44 is arranged on the early warning vibration plane 4133 and is electrically connected to the pressure sensor 42, and the early warning vibration plane 4133 is provided with a vibration fixing hole 4134 arranged along the length direction of the support frame body 4131, and the vibration early warning mechanism 44 is inserted into the vibration fixing hole 4134.

[0039] In the present application, when the vehicle contacts the warning detection slope 4132, the pressure sensor 42 detects the pressure signal in real time and triggers the vibration warning mechanism 44 to start. The vibration warning mechanism 44 generates high-frequency mechanical vibration through the vibration fixing hole 4134 on the warning vibration plane 4133 and transmits a tactile warning to the car cab through the car tire; the warning detection slope 4132 of the present application is designed to guide the collision force to disperse along the slope direction, thereby reducing the local stress concentration of the support frame body 4131; the vibration warning mechanism 44 is embedded in the warning detection slope 4132 through the vibration fixing hole 4134. The warning vibration plane 4133 ensures that the vibration energy is evenly transmitted along the length direction of the support frame body 4131 to prevent the vibration warning mechanism 44 from falling off or shifting; the physical isolation design of the warning detection slope 4132 (pressure sensing) and the warning vibration slope 4133 (tactile feedback) realizes the coordinated operation of collision detection and warning response and shortens the signal transmission delay; the array arrangement of the vibration fixing holes 4134 optimizes the vibration wave transmission path, expands the tactile warning coverage area to the full length range of the support frame body 4131, and improves the warning recognition rate of the car collision scene; Two ends of the support frame body 4131 are connected to the first extension support frame 411 and the second extension support frame 412 respectively.

[0040] Specifically, Figure 3As shown, the first extension support frame 411 and the second extension support frame 412 each include an extension support body 4111 and an inclined guide slope 4112 provided at the end of the extension support body 4111; The extension bracket body 4111 is provided with flash fixing grooves 4113 arranged in an array along the length direction of the extension bracket body 4111, and the extension bracket body 4111 is also provided with a flash warning slope 4114 located in the flash fixing grooves 4113; the flash warning mechanism 43 is arranged on the flash warning slope 4114 and is electrically connected to the pressure sensor 42.

[0041] In the present application, when the car contacts the warning detection slope 4132, the pressure sensor 42 triggers the flash warning mechanism 43 to project a strong light warning on the flash warning slope 4114 facing the car cab; the inclined guide slope 4112 converts the collision impact force into a component force along the axial direction of the extension bracket body 4111 through the inclined structure, reducing the risk of damage to the extension bracket body 4111 caused by the impact; the array-distributed flash fixing grooves 4113 make the flash warning mechanism 43 evenly arranged along the length direction of the extension bracket body 4111, and cooperate with the inclined reflective surface design of the flash warning slope 4114 to achieve light signal coverage of the car cab, thereby improving the effect of the flash warning; The flash warning mechanism 43 is preferably an LED flash lamp; the end of the extension bracket body 4111 is connected to the anti-collision vehicle body 1, and the inclined guide slope 4112 is provided on the other end of the extension bracket body 4111 relative to the anti-collision vehicle body 1.

[0042] More specifically, if Figure 2 As shown, the anti-collision buffer device 2 includes an anti-collision bag shell 21 connected to the rear end of the anti-collision vehicle body 1, and an anti-collision buffer bag 22 inserted into the anti-collision bag shell 21; The impact sensor 51 is connected to the anti-collision bag shell 21 and is located between the secondary warning device 4 and the anti-collision buffer bag 22 ; the buffer folding support mechanism 52 is inserted into the anti-collision bag shell 21 and is located between the anti-collision vehicle body 1 and the anti-collision buffer bag 22 .

[0043] In the present application, when a car collides with the anti-collision bag shell 21, the impact sensor 51 detects the deformation pressure of the anti-collision bag shell 21 in real time and triggers the buffer folding support mechanism 52 to unfold in the direction of the anti-collision vehicle body 1 to perform multi-stage energy absorption; the impact sensor 51 is arranged between the secondary warning device 4 and the anti-collision buffer bag 22, and can accurately distinguish the contact pressure in the warning stage from the impact load in the collision stage to avoid the false triggering of the buffer folding support mechanism 52; the buffer folding support mechanism 52 is unfolded in a direction away from the anti-collision vehicle body 1 after the impact sensor 51 is triggered, and the buffer support force is dynamically reinforced; the coordinated deformation of the buffer folding support mechanism 52 and the anti-collision buffer bag 22 forms a gradient energy absorption path, so that the collision energy is dissipated step by step through the deformation of the anti-collision bag shell 21, the unfolding resistance of the folding mechanism and the plastic deformation of the anti-collision buffer bag 22, thereby maximizing the collision deceleration time; The anti-collision buffer bag 22 of the present application is preferably an inflatable airbag structure. The nested structure of the anti-collision buffer bag shell 21 and the anti-collision buffer bag 22 of the present application forms a "rigid shell-flexible buffer layer" composite energy absorption system, which disperses the initial impact force through the anti-collision buffer bag shell 21 and absorbs the residual energy through the anti-collision buffer bag 22, thereby improving the overall impact resistance efficiency.

[0044] In addition, if Figure 2 and Figure 4 As shown, the buffer folding support mechanism 52 includes a buffer support seat 521 connected to the two side walls of the anti-collision bag shell 21, a hinged buffer frame 522 connected to the anti-collision bag shell 21 and located between the two buffer support seats 521, and a buffer drive component 523 connected to the buffer support seat 521 and used to drive the hinged buffer frame 522 to unfold or fold; the buffer drive component 523 is electrically connected to the impact sensor 51.

[0045] In the present application, when the impact sensor 51 detects the impact force of the collision, the buffer drive component 523 is triggered, and the buffer drive component 523 drives the articulated buffer frame 522 to unfold from the folded state to the direction away from the buffer support seats 521 on both sides to form a support structure; the buffer support seats 521 are symmetrically distributed on the two side walls of the anti-collision bag shell 21, and the overall torsional rigidity of the buffer drive component 523 after unfolding is improved through the rigid connection with the anti-collision bag shell 21; the articulated buffer frame 522 forms a gradient energy absorption buffer through the multi-stage dynamic unfolding resistance and the reverse action of the collision impact force, thereby improving the early warning linkage and buffering effect; The buffer drive assembly 523 is preferably an electric push rod or a hydraulic cylinder, which enables the articulated buffer frame 522 to be quickly deployed, ensuring the timeliness of the third-level early warning protection response.

[0046] And, if Figure 4As shown, the articulated buffer frame 522 includes an articulated support rod 5221 fixedly connected to the upper and lower side walls of the anti-collision bag shell 21, a first articulated rod 5222 sleeved on the outer wall of the articulated support rod 5221 and rotatably connected to the articulated support rod 5221, and a second articulated rod 5223 sleeved on the outer wall of the articulated support rod 5221 and rotatably connected to the articulated support rod 5221; the first articulated rod 5222 and the second articulated rod 5223 are cross-arranged and stacked in sequence along the length direction of the articulated support rod 5221.

[0047] In the present application, when the buffer drive assembly 523 is started, the first hinged rod 5222 and the second hinged rod 5223 rotate synchronously around the hinged support rod 5221 and unfold; the hinged support rod 5221 is symmetrically fixed to the upper and lower side walls of the anti-collision bag shell 21, ensuring that the first hinged rod 5222 and the second hinged rod 5223 are evenly stressed when unfolded, avoiding unilateral deflection and structural instability; the cross-stacked first hinged rod 5222 and the second hinged rod 5223 form an "X"-shaped multi-directional support node after unfolding, and the bending strength of the structure is improved through mutual constraints between the rods; in the folded state, the first hinged rod 5222 and the second hinged rod 5223 are close to the hinged support rod 5221, saving the internal space of the anti-collision bag shell 21, and after unfolding, the multi-node bracket and the anti-collision buffer bag 22 jointly form a composite energy absorption path, thereby improving the buffering performance.

[0048] Furthermore, if Figure 5 As shown, the first articulated rod 5222 and the second articulated rod 5223 each include an articulated rod body 5224, a fixed connecting plate 5225 disposed at one end close to the anti-collision vehicle body 1 and connected to multiple articulated rod bodies 5224, and a buffer support baffle 5226 disposed at the other end of the anti-collision vehicle body 1 and fixedly connected to multiple articulated rod bodies 5224.

[0049] In the present application, when the articulated rod body 5224 rotates and unfolds around the articulated support rod 5221, the fixed connecting plate 5225 locks the multiple articulated rod bodies 5224 into an integral synchronous movement, and the buffer support baffle 5226 abuts against the surface of the impact vehicle with the unfolding action to form a distributed support; the fixed connecting plate 5225 enhances the overall rigidity of the articulated rod group through a multi-rod parallel structure to prevent the single articulated rod body 5224 from unfolding asynchronously and causing stress concentration; the large-area plane design of the buffer support baffle 5226 forms a surface contact with the impact vehicle after unfolding, and disperses the impact load through friction and support reaction force, thereby reducing the risk of bending and rectangular deformation of the articulated rod body 5224; the articulated rod body 5224 is constrained at both ends by the fixed connecting plate 5225 and the buffer support baffle 5226, so as to form a bidirectional compression-resistant bracket structure after unfolding, thereby improving the bending strength; in the folded state, the buffer support baffle 5226 is close to the fixed connecting plate 5225, compressing the storage space, and ensuring the miniaturization and rapid response characteristics of the anti-collision buffer device 2; The hinge rod body 5224 is sleeved on the outer side wall of the hinge support rod 5221 and is rotatably connected to the hinge support rod 5221 .

[0050] Furthermore, if Figure 5 and Figure 6 As shown, the buffer drive assembly 523 includes a driving component body 5231 connected to the buffer support seat 521, and a guide push-pull rod 5232 connected to the output end of the driving component body 5231 and movably inserted in the hinged rod body 5224; push-pull sliding grooves 5233 are correspondingly provided on the two hinged rod bodies 5224 close to the driving component body 5231, and the push-pull sliding grooves 5233 are arranged along the length direction of the hinged rod body 5224, and the two ends of the guide push-pull rod 5232 are respectively movably inserted in the two push-pull sliding grooves 5233.

[0051] In the present application, when the impact sensor 51 triggers the start of the driving component body 5231, the guide push-pull rod 5232 slides in a straight line along the push-pull sliding groove 5233 in the hinged rod body 5224, pushing the hinged rods on both sides to simultaneously unfold to the supported locking position; the linear guide design of the push-pull sliding groove 5233 limits the movement trajectory of the guide push-pull rod 5232, ensuring that the unfolding angles of multiple hinged rod bodies 5224 are consistent, avoiding structural jamming due to differences in deflection angles; both ends of the guide push-pull rod 5232 are embedded in the push-pull sliding grooves 5233 to form a bilateral force transmission path, so that the output thrust of the driving component body 5231 is evenly distributed to the hinged rod bodies 5224 on both sides, thereby improving the unfolding speed and force transmission efficiency; the rigid connection structure between the driving component body 5231 and the buffer support seat 521 disperses the driving reaction force to the anti-collision package shell 21 through the buffer support seat 521, thereby reducing the risk of wear caused by the vibration of the buffer drive component 523 itself.

[0052] Specifically, if Figure 4 and Figure 6 As shown, the buffer folding support mechanism 52 also includes an elastic buffer component 524 arranged between the buffer support baffle 5226 and the buffer support seat 521.

[0053] In the present application, when the buffer folding support mechanism 52 is unfolded, the collision impact force is transmitted to the elastic buffer component 524 through the buffer support baffle 5226. The elastic buffer component 524 absorbs the residual kinetic energy through compression deformation and slows down the rigid contact impact between the buffer support baffle 5226 and the buffer support seat 521; the elastic buffer component 524 absorbs the peak impact energy through compression deformation at the moment of collision, reducing the risk of stress concentration on the hinge rod body 5224; the damping characteristics of the elastic buffer component 524 prolong the release time of the collision energy, so that the buffer folding support mechanism 52 The deployment resistance of the structure 52 forms a dynamic balance with the impact force, avoiding overload fracture at the connection between the buffer support seat 521 and the anti-collision bag shell 21; the elastic buffer component 524 presses the buffer support baffle 5226 and the buffer support seat 521 in a non-collision state, so that the buffer support baffle 5226 and the buffer support seat 521 maintain a moving trend in a direction away from each other; the coordinated deformation of the elastic buffer component 524 and the anti-collision buffer bag 22 forms a "elastic pre-compression-plastic energy dissipation" dual-stage energy absorption mechanism, which reduces the collision acceleration peak and improves the buffering efficiency; The elastic buffer component 524 is preferably a metal spring structure or high-resilience rubber.

[0054] More specifically, if Figure 7 As shown, a method for preventing a vehicle from being hit by a collision comprises an alarm device for preventing a vehicle from being hit by a collision, and further comprises the following steps: S1: When the vehicle reaches the preset distance detected by the radar mechanism 31, the radar mechanism 31 triggers the sound warning mechanism 32 to issue a sound alarm to perform a first-level warning; S2: When the vehicle continues to move towards the direction of the anti-collision vehicle body 1, the pressure sensor 42 is pressed down, triggering the flash warning mechanism 43 to emit high-frequency flashes facing the vehicle, and the pressure sensor 42 simultaneously triggers the vibration warning mechanism 44 to emit high-frequency vibrations to perform a secondary warning; S3: When the vehicle hits the impact sensor 51 on the anti-collision buffer device 2, the impact sensor 51 triggers the buffer folding support mechanism 52 to unfold in a direction away from the anti-collision vehicle body 1 to perform a third-level warning.

[0055] In S1 of the present application, the radar mechanism 31 detects the rear vehicle at a preset distance and triggers the sound warning mechanism 32 to issue a high-frequency sound wave warning; in S2, when the vehicle continues to approach and contacts the warning support frame 41, the pressure sensor 42 is compressed to trigger the flash warning mechanism 43 to project a high-frequency strong light and simultaneously start the vibration warning mechanism 44 to generate mechanical vibration, forming a sound, light, and tactile multi-modal warning; in S3, when the vehicle hits the anti-collision buffer device 2, the impact sensor 51 detects the preset threshold of the impact force in real time and drives the buffer folding support mechanism 52 to unfold to form a rigid support frame, and simultaneously compresses the anti-collision buffer bag 22 for energy absorption; the present application constructs a "remote warning-contact warning- The three-level response logic of "active buffering" is triggered by the signals of the radar mechanism 31, the pressure sensor 42, and the impact sensor 51, which shortens the warning response time; the dual signal synchronous output of the pressure sensor 42 and the vibration warning mechanism 44 and the flash warning mechanism 43 in S2 solves the risk of warning failure of a single warning mode in a rainy and foggy environment or when the driver is distracted; the design of the buffer folding support mechanism 52 in S3 unfolding in a direction away from the anti-collision vehicle body 1 offsets the collision kinetic energy through the unfolding reaction force, and dissipates the remaining energy step by step in combination with the plastic deformation of the anti-collision buffer package 22; the dynamic coordination of multi-level warning signals and mechanical buffering actions improves the protection efficiency.

[0056] The implementation principle of an anti-collision vehicle alarm device and an alarm method in the embodiment of the present application is as follows: An anti-collision vehicle alarm device, when a radar mechanism 31 detects that a rear vehicle is approaching, a sound warning mechanism 32 is triggered to give a sound prompt, so as to achieve a first-level warning; if the vehicle continues to approach and contacts a warning support frame 41, a pressure sensor 42 triggers a flash warning mechanism 43 to give a strong flashing warning, and simultaneously triggers a vibration warning mechanism 44 to give a mechanical vibration reminder, so as to achieve a second-level warning; when the collision impact force reaches a preset threshold, an impact sensor 51 triggers a buffer folding support mechanism 52 to unfold to enhance the structural strength of the anti-collision buffer device 2, so as to form a third-level active protection; The present application realizes the dynamic response of "long-range warning-contact warning-collision buffering" through the three-level coordination of the radar mechanism 31, the pressure sensor 42 and the impact sensor 51, thereby improving the timeliness and stability of the warning. The extended design of the warning support frame 41 expands the detection range of the pressure sensor 42, and combines the tactile feedback of the vibration warning mechanism 44 to effectively cover the inclined road collision scene. The buffer folding support mechanism 52 is quickly unfolded after the impact sensor 51 is triggered to form an energy-absorbing structure to reduce the deformation risk of the anti-collision vehicle body 1. The present application improves the active safety and impact resistance of the anti-collision vehicle in complex traffic environments through a multi-modal protection mechanism of sound, light, vibration and mechanical buffering. When the car collides with the anti-collision bag shell 21, the impact sensor 51 detects the deformation pressure of the anti-collision bag shell 21 in real time and triggers the buffer folding support mechanism 52 to unfold in the direction of the anti-collision vehicle body 1 to perform multi-stage energy absorption; the impact sensor 51 is arranged between the secondary warning device 4 and the anti-collision buffer bag 22, and can accurately distinguish the contact pressure in the warning stage from the impact load in the collision stage to avoid the false triggering of the buffer folding support mechanism 52; the buffer folding support mechanism 52 is unfolded in the direction away from the anti-collision vehicle body 1 after the impact sensor 51 is triggered, and the buffer support force is dynamically reinforced; the coordinated deformation of the buffer folding support mechanism 52 and the anti-collision buffer bag 22 forms a gradient energy absorption path, so that the collision energy is dissipated step by step through the deformation of the anti-collision bag shell 21, the unfolding resistance of the folding mechanism and the plastic deformation of the anti-collision buffer bag 22, thereby maximizing the collision deceleration time; An anti-collision vehicle alarm method, in S1, a radar mechanism 31 detects the rear vehicle at a preset distance and triggers a sound warning mechanism 32 to emit a high-frequency sound wave warning; in S2, when the vehicle continues to approach and contact the warning support frame 41, the pressure sensor 42 is compressed to trigger the flash warning mechanism 43 to project a high-frequency strong light and synchronously start the vibration warning mechanism 44 to generate mechanical vibration, forming a sound, light, and tactile multi-modal warning; in S3, when the vehicle hits the anti-collision buffer device 2, the impact sensor 51 detects the preset threshold of the impact force in real time and drives the buffer folding support mechanism 52 to unfold to form a rigid support frame, and synchronously compresses the anti-collision buffer bag 22 for energy absorption; this application constructs a "remote warning-connection The three-level response logic of "touch warning-active buffering" is triggered by the signals of the radar mechanism 31, the pressure sensor 42, and the impact sensor 51, which shortens the warning response time; the dual signal synchronous output of the pressure sensor 42 and the vibration warning mechanism 44 and the flash warning mechanism 43 in S2 solves the warning failure risk of a single warning mode in a rainy and foggy environment or when the driver is distracted; the design of the buffer folding support mechanism 52 in S3 unfolding in a direction away from the anti-collision vehicle body 1 offsets the collision kinetic energy through the unfolding reaction force, and dissipates the remaining energy step by step in combination with the plastic deformation of the anti-collision buffer package 22; the dynamic coordination of multi-level warning signals and mechanical buffering actions improves the protection efficiency.

[0057] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An anti-collision vehicle alarm device, characterized in that: It comprises an anti-collision vehicle body (1), an anti-collision buffer device (2) connected to the rear end of the anti-collision vehicle body (1), a first-level warning device (3) connected to the anti-collision buffer device (2), a second-level warning device (4), and a third-level warning device (5); The first-level warning device (3) comprises a radar mechanism (31) connected to the rear end of the anti-collision buffer device (2), and a sound warning mechanism (32) connected to the front end of the anti-collision buffer device (2); The secondary warning device (4) comprises a warning support frame (41) connected to the rear end of the anti-collision buffer device (2) and extending in a direction away from the anti-collision buffer device (2), a pressure sensor (42) connected to the warning support frame (41), a flash warning mechanism (43) connected to the warning support frame (41) and electrically connected to the pressure sensor (42), and a vibration warning mechanism (44) connected to the warning support frame (41) and electrically connected to the pressure sensor (42); The three-level warning device (5) comprises an impact sensor (51) connected to the rear end of the anti-collision buffer device (2), and a buffer folding support mechanism (52) inserted into the anti-collision buffer device (2) and electrically connected to the impact sensor (51).

2. The anti-collision vehicle alarm device according to claim 1, characterized in that: The warning support frame (41) comprises a first extension support frame (411) located on one side of the anti-collision buffer device (2), a second extension support frame (412) located on the other side of the anti-collision buffer device (2) and arranged parallel to the first extension support frame (411), and a vibration support frame (413) located between the first extension support frame (411) and the second extension support frame (412) and arranged in an array in a direction away from the anti-collision buffer device (2), and the vibration warning mechanism (44) is arranged on the vibration support frame (413).

3. The anti-collision vehicle alarm device according to claim 2, characterized in that: The vibration support frame (413) comprises a support frame body (4131), an early warning detection slope (4132) arranged on the support frame body (4131), and an early warning vibration plane (4133) arranged on the support frame body (4131) and located on one side of the early warning detection slope (4132); the pressure sensor (42) is connected to the early warning detection slope (4132), the vibration early warning mechanism (44) is arranged on the early warning vibration plane (4133) and is electrically connected to the pressure sensor (42), and the early warning vibration plane (4133) is provided with a vibration fixing hole (4134) arranged along the length direction of the support frame body (4131), and the vibration early warning mechanism (44) is inserted into the vibration fixing hole (4134).

4. The anti-collision vehicle alarm device according to claim 2, characterized in that: The first extension support frame (411) and the second extension support frame (412) both include an extension support body (4111) and an inclined guide slope (4112) provided at the end of the extension support body (4111); The extension bracket body (4111) is provided with flash fixing grooves (4113) arranged in an array along the length direction of the extension bracket body (4111), and the extension bracket body (4111) is also provided with a flash warning slope (4114) located on the flash fixing grooves (4113); the flash warning mechanism (43) is arranged on the flash warning slope (4114) and is electrically connected to the pressure sensor (42).

5. The anti-collision vehicle alarm device according to claim 1, characterized in that: The anti-collision buffer device (2) comprises an anti-collision bag shell (21) connected to the rear end of the anti-collision vehicle body (1), and an anti-collision buffer bag (22) inserted into the anti-collision bag shell (21); The impact sensor (51) is connected to the anti-collision bag shell (21) and is located between the secondary warning device (4) and the anti-collision buffer bag (22); the buffer folding support mechanism (52) is inserted into the anti-collision bag shell (21) and is located between the anti-collision vehicle body (1) and the anti-collision buffer bag (22).

6. The anti-collision vehicle alarm device according to claim 5, characterized in that: The buffer folding support mechanism (52) comprises a buffer support seat (521) connected to the two side walls of the anti-collision bag shell (21), an articulated buffer frame (522) connected to the anti-collision bag shell (21) and located between the two buffer support seats (521), and a buffer drive component (523) connected to the buffer support seat (521) and used to drive the articulated buffer frame (522) to unfold or fold; the buffer drive component (523) is electrically connected to the impact sensor (51).

7. The anti-collision vehicle alarm device according to claim 6, characterized in that: The articulated buffer frame (522) includes an articulated support rod (5221) fixedly connected to the upper and lower side walls of the anti-collision bag shell (21), a first articulated rod (5222) sleeved on the outer side wall of the articulated support rod (5221) and rotatably connected to the articulated support rod (5221), and a second articulated rod (5223) sleeved on the outer side wall of the articulated support rod (5221) and rotatably connected to the articulated support rod (5221); the first articulated rod (5222) and the second articulated rod (5223) are cross-arranged and stacked in sequence along the length direction of the articulated support rod (5221).

8. The anti-collision vehicle alarm device according to claim 7, characterized in that: The first hinged rod (5222) and the second hinged rod (5223) each comprise a hinged rod body (5224), a fixed connection plate (5225) disposed at one end of the anti-collision vehicle body (1) and connected to a plurality of the hinged rod bodies (5224), and a buffer support baffle (5226) disposed at the other end of the anti-collision vehicle body (1) and fixedly connected to a plurality of the hinged rod bodies (5224).

9. The anti-collision vehicle alarm device according to claim 8, characterized in that: The buffer drive assembly (523) includes a driving component body (5231) connected to the buffer support seat (521), and a guide push-pull rod (5232) connected to the output end of the driving component body (5231) and movably inserted in the hinged rod body (5224); push-pull sliding grooves (5233) are correspondingly provided on the two hinged rod bodies (5224) close to the driving component body (5231), and the push-pull sliding grooves (5233) are arranged along the length direction of the hinged rod body (5224), and the two ends of the guide push-pull rod (5232) are respectively movably inserted in the two push-pull sliding grooves (5233).

10. A method for preventing a vehicle from crashing, characterized in that: The anti-collision vehicle alarm device according to any one of claims 1 to 9 further comprises the following steps: S1: When the vehicle reaches a preset distance detected by the radar mechanism (31), the radar mechanism (31) triggers the sound warning mechanism (32) to issue a sound alarm to perform a first-level warning; S2: When the vehicle continues to move towards the direction approaching the anti-collision vehicle body (1), the pressure sensor (42) is pressed down, triggering the flash warning mechanism (43) to emit a high-frequency flash towards the vehicle, and the pressure sensor (42) synchronously triggers the vibration warning mechanism (44) to emit a high-frequency vibration, so as to perform a secondary warning; S3: When a vehicle collides with the impact sensor (51) on the anti-collision buffer device (2), the impact sensor (51) triggers the buffer folding support mechanism (52) to unfold in a direction away from the anti-collision vehicle body (1) to perform a third-level warning.

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