Dynamic laser projection marking device for mutual rescue of rail transit motor train units based on vehicle-vehicle ad hoc network

Abstract

The invention relates to the technical field of laser projection, in particular to a dynamic laser projection marking device for mutual rescue of rail transit motor train units based on a vehicle-vehicle ad hoc network, which comprises a laser projection body, an outer sleeve box arranged outside the laser projection body, a protection mechanism arranged on the top surface in the laser projection body, and a mirror surface cleaning part. According to the dynamic laser projection marking device for mutual rescue of the rail transit motor train units based on the vehicle-vehicle ad hoc network, a baffle plate displacement end point triggers embedding of a guide block and a round hole, so that a liquid blocking plug moves downwards to conduct a cross-shaped through pipe, accurate time sequence matching of full opening of the baffle plate and spraying of cleaning liquid is achieved, a piston plate is matched, and a push plate is linked through a connecting rod; the opening action of the baffle is utilized to pressurize and supply liquid to the liquid storage tank, closed-loop control of mechanical action and cleaning start and stop is formed, the problem of response delay existing in a traditional separated system of the structure is solved, and the investment of additional pressurizing equipment is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of laser projection, in particular to a dynamic laser projection marking device for mutual rescue of rail transit EMUs based on a vehicle-to-vehicle ad hoc network. Background Art

[0002] The dynamic laser projection marking device for mutual rescue of rail transit EMUs based on the vehicle-to-vehicle self-organizing network is specially designed for rail transit emergency rescue. When a certain EMU breaks down and needs to be rescued, it shares its precise position, posture and connector information with the adjacent rescue vehicle in real time through the vehicle-to-vehicle self-organizing network. After receiving the data, the rescue vehicle calculates the optimal docking path and uses a high-precision laser projection system to dynamically project clear and eye-catching colored markings or arrows on the track or the ground.

[0003] The patent with application number CN202021865575.7 discloses a railway platform car position guidance device, which consists of a main control unit and a projection unit. The main control unit includes an information collection module, an information processing module, an identification generation module, a control module and a communication module, which is used to connect to the station data center and collect station stop plans, marshalling and other information, process and generate projection identification graphics for each door; the projection unit includes a receiving module and a laser projection module, which consists of multiple sets, which are installed on the station platform respectively, and communicate with the main control unit network to receive and project vehicle number identification information.

[0004] However, the laser projection system of existing rescue equipment lacks an integrated protection and self-cleaning mechanism. Its lens exposure mechanism and cleaning system are controlled separately, resulting in a delayed cleaning response after the baffle is opened, causing the lens to be quickly contaminated in rainy, foggy, and dusty environments. At the same time, traditional equipment relies on simple spraying, which can neither achieve mechanical interlocking between the baffle displacement stroke and the start and stop of cleaning, nor can it use the energy of the mechanism action to drive the supply of cleaning liquid. In addition, the existing projection device lacks a continuous protection mechanism, which makes it easy for flying insects and dust to adhere to the lens surface, and the residual droplets after cleaning need to be naturally air-dried.

[0005] In view of this, we propose a dynamic laser projection marking device for mutual rescue of rail transit EMUs based on a vehicle-to-vehicle ad hoc network. Summary of the Invention

[0006] The purpose of the present invention is to provide a dynamic laser projection marking device for mutual rescue of rail transit EMUs based on a vehicle-to-vehicle self-organizing network, with precise timing matching of full opening of the baffle and spraying of the cleaning liquid to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions: A dynamic laser projection marking device for mutual rescue of rail transit EMUs based on a vehicle-to-vehicle self-organizing network includes a laser projection body, an outer casing provided on the outside of the laser projection body, a protective mechanism provided on the top surface thereof, and a mirror cleaning portion; The protection mechanism includes a motor, a screw driven by the motor, a push plate sleeved on the outside of the screw, and baffles arranged at both ends of the push plate. The bottom surfaces of the left and right ends of the push plate are provided with protruding rods, and the top surface of the baffle is provided with an inclined groove and a circular hole. This setting drives the screw to rotate through the motor, drives the push plate to move, drives the convex rod to move along the inclined groove, and drives the two baffles to move relative to each other; The mirror cleaning unit includes a sleeve frame, a piston plate sliding in the sleeve frame, a liquid storage box arranged at the rear side of the piston plate, a liquid discharge pipe arranged at both ends of the liquid storage box, a connecting portion arranged at the front end of the liquid discharge pipe, and a liquid spray head between a pair of connecting portions; When the baffle moves, it drives the piston plate to move in the sleeve frame, and introduces external gas into the liquid storage tank to pressurize it, so that the cleaning liquid inside can flow from the discharge pipe into the connecting part and be sprayed by the liquid spray head onto the lens surface of the laser projection body.

[0008] In the technical solution of the present invention, the outer casing includes a casing, a partition welded to the inner wall of the casing, a fixing frame fixedly connected to the rear wall of the casing by bolts, a fan fixedly connected to the center of the rear wall of the fixing frame by screws, heating wires arranged on the left and right sides of the fan, a cover plate clamped to the top surface of the casing and the fixing frame, and two rectangular openings are opened inside the partition.

[0009] In the technical solution of the present invention, slide grooves that pass through the left and right sides are opened on the box walls at both ends of the box body, an air duct that passes through the front and back and is connected to the slide grooves is opened inside the box body, and a number of regularly distributed air holes that pass through the top and bottom are opened on the top surface of the cover plate.

[0010] The above configuration, through the arrangement of the fan and the heating wire, cooperates with the air duct, so that in cold climates, the air flow can be heated and blown towards the lens of the laser projector body, thereby preventing the lens of the laser projector body from freezing when it comes into contact with water and affecting the projection effect.

[0011] In the technical solution of the present invention, the motor is fixedly connected to the top surface of the laser projection body by screws, the screw rod is coaxially connected to the output shaft of the motor, and the end of the screw rod passes through the partition and is rotatably connected to the inner wall of the box.

[0012] In the technical solution of the present invention, the push plate is threadedly connected to the screw rod and slidably connected to the inner wall of the box body, and the protruding rod and the push plate are integrally formed.

[0013] In the technical solution of the present invention, the longitudinal cross-section of the baffle is L-shaped, the size of the inclined groove is adapted to the size of the protruding rod, and a connecting groove with an L-shaped transverse cross-section is provided on the rear wall of the baffle. The end of the connecting groove is connected to the outer wall of the baffle, and a guide vane is clamped on the groove wall of the connecting groove.

[0014] The above arrangement prevents a large amount of dust from pouring in and contaminating the lens of the laser projection body when the front baffle is opened by providing two detachable baffles in front of the lens of the laser projection body.

[0015] In the technical solution of the present invention, the sleeve frame is clamped and fixed to the outer side of the partition opening, the side wall and rear wall of the sleeve frame are clamped with the air inlet valve and the air outlet valve respectively, and the piston plate is slidably connected to the inside of the sleeve frame.

[0016] In the technical solution of the present invention, the mirror cleaning part also includes a connecting rod clamped between the push plate and the piston plate, an air pipe connected to the air outlet valve is clamped on the outer wall of the liquid storage box, and the rear end of the discharge pipe extends to the interior of the liquid storage box near the bottom.

[0017] This setting reduces the investment in additional pressurizing equipment by pressurizing the liquid storage tank while the baffle is open.

[0018] In the technical solution of the present invention, the connecting part includes a cross-through pipe, a liquid-blocking plug slidably connected to its longitudinal tube body, and a guide block integrally formed on the bottom surface of the liquid-blocking plug. A liquid-through hole is opened on the top of the liquid-blocking plug and passes through the left and right sides. When the two baffles are completely separated, the bottom end of the liquid-blocking plug falls into the circular hole, connecting the liquid-through hole with the transverse tube body of the cross-through pipe.

[0019] In the technical solution of the present invention, the size of the longitudinal tube body of the cross tube is adapted to the size of the circular hole, and the two ends of the transverse tube body of the cross tube are respectively clamped and fixed to the discharge pipe and the liquid spray head, and the liquid spray head is clamped and fixed above the front end opening of the box body.

[0020] This setting achieves precise timing matching of the full opening of the damper and the release of cleaning fluid from the spray head.

[0021] Compared with the prior art, the present invention has the following beneficial effects: 1. This dynamic laser projection marking device for mutual rescue of rail transit EMUs based on a vehicle-to-vehicle self-organizing network triggers the engagement of the guide block with the circular hole at the end point of the baffle displacement, causing the liquid blocking plug to move downward to connect the cross-tube, achieving precise timing matching between the full opening of the baffle and the spraying of the cleaning fluid. The piston plate is linked to the push plate through the connecting rod, and the opening action of the baffle is used to pressurize the liquid storage tank to supply liquid, forming a closed-loop control of mechanical action and cleaning start and stop. This structure solves the response delay problem existing in traditional separate systems and reduces the investment in additional pressurizing equipment.

[0022] 2. This dynamic laser projection marking device for mutual rescue between rail transit EMUs based on a vehicle-to-vehicle self-organizing network innovatively integrates air ducts, guide vane arrays, and connecting slots to form an airflow network. After the fan drives the airflow to accelerate through the air duct, the guide vanes form a laminar air curtain on the lens surface, instantly drying and cleaning residual droplets, and establishing a continuous positive pressure barrier to prevent flying insects from attaching, suppressing the deposition of dust on the track. This collaboratively ensures that the lens can continuously output high-definition projection markings in complex environments such as rain, fog, and dust, thereby improving the success rate of rescue docking. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the structure of the outer box in the present invention; Figure 4 It is a partial structural diagram of the outer casing in the present invention; Figure 5 Schematic diagram of the structure of the protection mechanism of the present invention; Figure 6 For the present invention Figure 5 A magnified schematic diagram of part A; Figure 7 Schematic diagram of the structure of the baffle in the present invention; Figure 8 This is one of the structural diagrams of the mirror cleaning unit in the present invention; Figure 9 This is the second structural diagram of the mirror cleaning unit in the present invention; Figure 10 It is a schematic cross-sectional view of the structure of the connecting portion in the present invention; Description of reference numerals: 100. Laser projection body; 200, outer box; 210, box body; 211, slide; 212, air duct; 220, partition; 230, fixing frame; 240, fan; 250, heating wire; 260, cover; 300, protective mechanism; 310, motor; 320, screw; 330, push plate; 331, protruding rod; 340, baffle; 341, inclined groove; 342, circular hole; 343, connecting groove; 400, mirror cleaning unit; 410, sleeve frame; 420, piston plate; 430, connecting rod; 440, liquid storage tank; 450, drain pipe; 460, connecting unit; 461, cross pipe; 462, liquid blocking plug; 4620, liquid hole; 463, guide block; 470, liquid spray head. DETAILED DESCRIPTION

[0024] The following will provide a clear and complete description of the technical solutions of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0025] See also Figures 1-4 As shown, this embodiment provides a technical solution: A dynamic laser projection marking device for mutual rescue of rail transit EMUs based on a vehicle-to-vehicle self-organizing network includes a laser projection body 100, an outer casing 200 is provided on the outside of the laser projection body 100, a protective mechanism 300 and a mirror cleaning part 400 are provided on the top surface thereof.

[0026] Specifically, the outer box 200 includes a box body 210, a partition 220 welded to the inner wall of the box body 210, a fixed frame 230 fixedly connected to the rear wall of the box body 210 by bolts, a fan 240 fixedly connected to the center of the rear wall of the fixed frame 230 by screws, an electric heating wire 250 arranged on the left and right sides of the fan 240, and a cover 260 clamped on the top surface of the box body 210 and the fixed frame 230. Two rectangular openings are opened inside the partition 220.

[0027] Furthermore, a slide groove 211 is provided on the left and right walls of the box body 210 at both ends, and an air duct 212 is provided inside the box body 210 that runs through the front and back and is connected to the slide groove 211. A plurality of air holes that are regularly distributed and run through the top and bottom are provided on the top surface of the cover plate 260.

[0028] Furthermore, the slide groove 211 on the box body 210 is used to provide a sliding area for the structure in the protective mechanism 300, the air duct 212 is used to allow the air flow to blow from the rear end to the front end of the box body 210, the partition 220 is used to separate the space above the laser projection body 100, the fixing frame 230 is used to provide a fixing platform for the fan 240 and the heating wire 250, and the cover 260 is used to provide protection for the equipment in the box body 210. This setting, through the setting of the fan 240 and the heating wire 250, cooperates with the air duct 212, so that in cold climates, the air flow can be heated and then blown to the lens of the laser projection body 100, thereby preventing the lens of the laser projection body 100 from freezing when it encounters water and affecting the projection effect.

[0029] See also Figure 5-Figure 7As shown, in this embodiment, the protective mechanism 300 includes a motor 310, a screw rod 320 driven by it, a push plate 330 sleeved on the outside of the screw rod 320, and baffles 340 arranged at both ends of the push plate 330. The bottom surfaces of the left and right ends of the push plate 330 are provided with protruding rods 331, and the top surface of the baffle 340 is provided with an inclined groove 341 and a circular hole 342. The motor 310 drives the screw rod 320 to rotate, drives the push plate 330 to displace, drives the protruding rod 331 to move along the inclined groove 341, and drives the two baffles 340 to move relative to each other.

[0030] Specifically, the motor 310 is fixedly connected to the top surface of the laser projection body 100 by screws, the screw rod 320 is coaxially connected to the output shaft of the motor 310 , and the end of the screw rod 320 passes through the partition 220 and is rotatably connected to the inner wall of the box body 210 .

[0031] Furthermore, the push plate 330 is threadedly connected to the screw rod 320 and slidably connected to the inner wall of the box body 210 , and the protruding rod 331 and the push plate 330 are integrally formed.

[0032] Furthermore, the longitudinal cross-section of the baffle 340 is L-shaped, the size of the inclined groove 341 is adapted to the size of the protruding rod 331, and a connecting groove 343 with an L-shaped transverse cross-section is provided on the rear wall of the baffle 340. The end of the connecting groove 343 is connected to the outer wall of the baffle 340, and a guide vane is clamped on the groove wall of the connecting groove 343.

[0033] Furthermore, after the motor 310 is started, the driving screw 320 rotates and drives the push plate 330 to move backward, driving the protruding rod 331 to move along the inclined groove 341 on the baffle 340, thereby driving the two baffles 340 to move away from each other, exposing the lens of the laser projection body 100 under the vehicle body hook, and at the same time allowing the connecting groove 343 to be connected to the air duct 212. This setting prevents a large amount of dust from pouring in and contaminating the lens of the laser projection body 100 when the front baffle is opened by arranging two detachable baffles 340 in front of the lens of the laser projection body 100.

[0034] See also Figure 5-10 As shown, in this embodiment, the mirror cleaning unit 400 includes a housing 410, a piston plate 420 sliding in the housing 410, a liquid storage box 440 arranged on the rear side of the piston plate 420, a drainage pipe 450 arranged at both ends of the liquid storage box 440, a connecting portion 460 arranged at the front end of the drainage pipe 450, and a liquid spray head 470 between the pair of connecting portions 460. When the baffle 340 moves, it drives the piston plate 420 to move in the housing 410, and introduces external gas into the liquid storage box 440 to pressurize it, so that the cleaning liquid inside the liquid storage box can flow from the drainage pipe 450 into the connecting portion 460 and be sprayed onto the lens surface of the laser projection body 100 by the liquid spray head 470.

[0035] Specifically, the sleeve frame 410 is clamped and fixed to the outer side of the opening of the partition 220 , the side wall and the rear wall of the sleeve frame 410 are clamped with the air inlet valve and the air outlet valve respectively, and the piston plate 420 is slidably connected to the inside of the sleeve frame 410 .

[0036] Furthermore, the mirror cleaning part 400 also includes a connecting rod 430 clamped between the push plate 330 and the piston plate 420, an air pipe connected to the air outlet valve is clamped on the outer wall of the liquid storage box 440, and the rear end of the drain pipe 450 extends to the interior of the liquid storage box 440 near the bottom.

[0037] Furthermore, the piston plate 420 moves backward along with the push plate 330 through the connecting rod 430, and the gas in the sleeve frame 410 enters the interior of the liquid storage tank 440 through the air pipe on the rear wall air outlet valve, thereby pressurizing the interior. This setting reduces the investment in additional pressurizing equipment by pressurizing the liquid storage tank 440 while the baffle 340 is open.

[0038] See also Figure 5-10 As shown, in this embodiment, the connecting portion 460 includes a cross-through tube 461, a liquid-blocking plug 462 slidably connected to its longitudinal tube body, and a guide block 463 integrally formed on the bottom surface of the liquid-blocking plug 462. A liquid-through hole 4620 is provided at the top of the liquid-blocking plug 462, which passes through the left and right liquids. When the two baffles 340 are completely separated, the bottom end of the liquid-blocking plug 462 falls into the circular hole 342, thereby connecting the liquid-through hole 4620 with the horizontal tube body of the cross-through tube 461.

[0039] Specifically, the size of the longitudinal tube body of the cross tube 461 is adapted to the size of the circular hole 342 , and the two ends of the transverse tube body of the cross tube 461 are respectively clamped and fixed to the discharge pipe 450 and the spray head 470 , and the spray head 470 is clamped and fixed above the front opening of the box body 210 .

[0040] Furthermore, when the baffle 340 moves to the end, the guide block 463 falls into the inside of the circular hole 342, allowing the liquid blocking plug 462 to move downward in the longitudinal tube body of the cross tube 461, and the two ends of the transverse tube body of the cross tube 461 are connected through the liquid hole 4620, so that the cleaning liquid can be sprayed by the liquid spray head 470 to the lens of the laser projection body 100 after the baffle 340 is fully opened to clean it. This setting realizes the precise timing matching between the full opening of the baffle 340 and the spraying of the cleaning liquid by the liquid spray head 470.

[0041] Finally, it should be noted that the laser projection body 100 and motor 310 involved in the present invention are all universal standard parts or components known to those skilled in the art. Their structures and principles are known to those skilled in the art through technical manuals or conventional experimental methods. In the idle space of this device, the laser projection body 100 and the motor 310 are connected to the external power supply through wires. The specific connection method should refer to the working principle of the present invention. The electrical connection between the electrical components is completed in a sequential working order, and the detailed connection methods are all well-known technologies in the art.

[0042] When the dynamic laser projection marking device for mutual rescue of rail transit EMUs based on a vehicle-to-vehicle ad hoc network of the present invention is in use, when a rescue vehicle approaches a faulty vehicle, the rescue vehicle and the faulty vehicle simultaneously open their front tailgates and release their end hooks; Next, the motor 310 in the protection mechanism 300 is activated, driving the screw rod 320 to rotate, which in turn drives the push plate 330 to move backward, driving the protruding rod 331 to move along the inclined slot 341 on the baffle 340, thereby driving the two baffles 340 away from each other, exposing the lens of the laser projection body 100 below the vehicle body hook; At this time, the piston plate 420 in the mirror cleaning unit 400 moves backward along with the push plate 330 via the connecting rod 430, and the gas in the sleeve frame 410 enters the interior of the liquid storage box 440 through the air pipe on the rear wall outlet valve, thereby pressurizing the interior; Subsequently, when the baffle 340 moves to the end, the guide block 463 falls into the circular hole 342, allowing the liquid blocking plug 462 to move downward within the longitudinal tube body of the cross tube 461. The two ends of the transverse tube body of the cross tube 461 are connected through the liquid hole 4620. After the baffle 340 is fully opened, the cleaning liquid can be sprayed by the liquid spray head 470 toward the lens of the laser projection body 100 to clean it. Next, the fan 240 in the outer case 200 is activated, allowing external air to enter the interior of the fixing frame 230 and then enter the interior of the connecting slot 343 through the air duct 212. The guide vanes on the wall of the connecting slot 343 then form an airflow over the lens surface of the laser projection body 100, drying the lens while preventing flying insects from settling on the lens surface and affecting the projection of the track. Afterwards, the rescue vehicle driver accurately controls the vehicle speed and end hook posture by observing the dynamic laser projection markings in real time. The distance parameters and cross reference markings generated in real time by the projection system provide the driver with a basis for spatial positioning and angle calibration. When the distance between vehicles reaches the docking threshold, the projection markings automatically switch to dynamic guidance mode to assist the driver in completing the hook locking operation with millimeter-level precision.

[0043] The foregoing descriptions of specific exemplary embodiments of the present invention are for purposes of illustration and description. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is apparent that many variations and modifications are possible in light of the foregoing teachings. The exemplary embodiments have been selected and described for the purpose of explaining the specific principles of the invention and their practical application, thereby enabling those skilled in the art to make and utilize a variety of exemplary embodiments of the invention and various options and modifications. The scope of the invention is intended to be defined by the description and its equivalents.

Claims

1. A dynamic laser projection marking device for mutual rescue of rail transit EMUs based on a vehicle-to-vehicle self-organizing network, comprising a laser projection body, characterized in that: The laser projection body is provided with an outer box, a protective mechanism and a mirror cleaning part on the top surface thereof; The protection mechanism includes a motor, a screw driven by the motor, a push plate sleeved on the outside of the screw, and baffles arranged at both ends of the push plate. The bottom surfaces of the left and right ends of the push plate are each provided with a protruding rod, and the top surface of the baffle is provided with an inclined groove and a circular hole. The motor drives the screw to rotate, driving the push plate to move, driving the protruding rod to move along the inclined groove, and driving the two baffles to move relative to each other. The mirror cleaning unit includes a sleeve frame, a piston plate sliding in the sleeve frame, a liquid storage box arranged on the rear side of the piston plate, a drainage pipe arranged at both ends of the liquid storage box, a connecting part arranged at the front end of the drainage pipe, and a liquid spray head between a pair of connecting parts. When the baffle moves, it drives the piston plate to move in the sleeve frame, and introduces external gas into the liquid storage box to pressurize it, so that the cleaning liquid inside it can flow from the drainage pipe to the connecting part and be sprayed onto the lens surface of the laser projection body by the liquid spray head.

2. The dynamic laser projection marking device for mutual rescue of rail transit EMUs based on a vehicle-to-vehicle ad hoc network according to claim 1 is characterized by: The outer box includes a box body, a partition welded to the inner wall of the box body, a fixing frame fixedly connected to the rear wall of the box body by bolts, a fan fixedly connected to the center of the rear wall of the fixing frame by screws, heating wires arranged on the left and right sides of the fan, and a cover plate clamped on the top surface of the box body and the fixing frame. Two rectangular openings are opened inside the partition.

3. The dynamic laser projection marking device for mutual rescue of rail transit EMUs based on a vehicle-to-vehicle ad hoc network according to claim 2 is characterized by: The box walls at both ends of the box body are provided with sliding grooves that pass through left and right, the box body is provided with an air duct that passes through front and back and is connected to the sliding grooves, and the top surface of the cover plate is provided with a number of regularly distributed air holes that pass through up and down.

4. The dynamic laser projection marking device for mutual rescue of rail transit EMUs based on a vehicle-to-vehicle ad hoc network according to claim 1 is characterized by: The motor is fixedly connected to the top surface of the laser projection body by screws, the screw rod is coaxially connected to the output shaft of the motor, and the end of the screw rod passes through the partition and is rotatably connected to the inner wall of the box body.

5. The dynamic laser projection marking device for mutual rescue of rail transit EMUs based on a vehicle-to-vehicle ad hoc network according to claim 1 is characterized by: The push plate is threadedly connected to the screw rod and slidably connected to the inner wall of the box body, and the protruding rod and the push plate are integrally formed.

6. The dynamic laser projection marking device for mutual rescue of rail transit EMUs based on a vehicle-to-vehicle ad hoc network according to claim 1 is characterized by: The longitudinal section of the baffle is L-shaped, the size of the inclined groove is adapted to the size of the protruding rod, and a connecting groove with an L-shaped transverse section is provided on the rear wall of the baffle. The end of the connecting groove is connected to the outer wall of the baffle, and a guide vane is clamped on the groove wall of the connecting groove.

7. The dynamic laser projection marking device for mutual rescue of rail transit EMUs based on a vehicle-to-vehicle ad hoc network according to claim 1 is characterized by: The sleeve frame is clamped and fixed to the outer side of the partition opening, the side wall and the rear wall of the sleeve frame are clamped with an air inlet valve and an air outlet valve respectively, and the piston plate is slidably connected to the inside of the sleeve frame.

8. The dynamic laser projection marking device for mutual rescue of rail transit EMUs based on a vehicle-to-vehicle ad hoc network according to claim 1 is characterized by: The mirror cleaning part also includes a connecting rod clamped between the push plate and the piston plate, an air pipe connected to the air outlet valve is clamped on the outer wall of the liquid storage box, and the rear end of the discharge pipe extends to the inside of the liquid storage box near the bottom.

9. The dynamic laser projection marking device for mutual rescue of rail transit EMUs based on a vehicle-to-vehicle ad hoc network according to claim 1 is characterized by: The connecting part includes a cross pipe, a liquid blocking plug slidably connected to its longitudinal tube body, and a guide block integrally formed on the bottom surface of the liquid blocking plug. A liquid through hole is opened on the top of the liquid blocking plug and passes through the left and right sides. When the two baffles are completely separated, the bottom end of the liquid blocking plug falls into the circular hole, thereby connecting the liquid through hole with the horizontal tube body of the cross pipe.

10. The dynamic laser projection marking device for mutual rescue of rail transit EMUs based on a vehicle-to-vehicle ad hoc network according to claim 9 is characterized in that: The size of the longitudinal tube body of the cross pipe is adapted to the size of the circular hole. The two ends of the transverse tube body of the cross pipe are respectively fixed with the discharge pipe and the liquid spray head. The liquid spray head is fixed above the front opening of the box body.

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