An alarm blocking system

Abstract

The utility model belongs to the technical field of highway early warning blocking, especially relates to a warning blocking system. Warning blocking system, including the first camera for carrying out accident monitoring to the key monitoring road section, still include the water curtain imaging unit of electric connection with the first camera, the first camera sets up at the top of water curtain imaging unit, water curtain imaging unit includes spraying device, projection adjusting device and water supply equipment, spraying device is located at the top of water curtain imaging unit, water supply equipment is linked together with spraying device through water pipe, spraying device releases water liquid downward and forms water curtain, projection adjusting device sets up at the top of water curtain imaging unit and is perpendicular to the plane where water curtain is, projection adjusting device projects to water curtain, the starting point of key monitoring road section is the highway position where water curtain imaging unit is located, the terminal point of key monitoring road section is the Y4 position place of the front of water curtain imaging unit along the highway advancing direction. The utility model can carry out warning blocking to the vehicle on the highway.

Description

Technical Field

[0001] This utility model belongs to the field of highway early warning and blocking technology, and in particular relates to an alarm and blocking system. Background Technology

[0002] Vehicles travel at high speeds on highways, and traffic volume surges during holidays.

[0003] When an accident occurs on a highway, traffic police cannot immediately reach the scene to conduct an accident investigation and manage traffic. Before the police arrive, vehicles often fail to brake in time, or following vehicles fail to brake because they are unaware of the accident ahead, leading to chain-reaction accidents. Furthermore, accidents occurring inside tunnels on highways frequently result in subsequent chain-reaction accidents.

[0004] While drones can now be used to broadcast warnings and guide traffic after accidents on highways, their effectiveness is limited for vehicles already inside tunnels, and even more so for vehicles with closed windows and using car stereos in the summer. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an alarm and blocking system that can effectively alarm and block vehicles on the highway, thereby reducing the occurrence of subsequent chain accidents.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An alarm and obstruction system includes a first camera for monitoring accidents on key road sections, and a water curtain imaging unit electrically connected to the first camera, with the first camera positioned above the water curtain imaging unit. The water curtain imaging unit includes a spray device, a projection adjustment device, and a water supply device. The spray device is located at the top of the water curtain imaging unit. The water supply device is connected to the spray device via a water pipe. The spray device releases water downwards to form a water curtain that is vertical and spans across the road. The projection adjustment device is positioned at the top of the water curtain imaging unit and perpendicular to the plane of the water curtain, projecting onto the water curtain. The starting point of the key monitoring road section is the location of the water curtain imaging unit on the road, and the ending point of the key monitoring road section is a position Y4 ahead of the water curtain imaging unit along the direction of travel on the road.

[0008] Preferably, the spraying device includes a liquid storage pipe and a water column unit; the liquid storage pipe is located at the top of the spraying device, and the bottom of the liquid storage pipe is parallel to the ground; the top of the liquid storage pipe is connected to the water supply equipment through a water pipe; several adjacent and closely arranged water column units are provided at the bottom of the liquid storage pipe; the water column units release water downward to form water columns, and several water columns are closely arranged to form a water curtain.

[0009] Preferably, the water column unit includes, from top to bottom, a pressure regulating valve, a liquid storage box, and a nozzle; each liquid storage box and the liquid storage pipe are connected by a pipe, and a pressure regulating valve is installed on the pipe; several nozzles are installed at the bottom of the liquid storage box.

[0010] Preferably, the bottom of the liquid storage box is provided with three or more rows of nozzles, with adjacent rows of nozzles arranged alternately; with the vehicle's direction of travel as the front-to-back direction, the odd-numbered rows of nozzles are in the same position in the left-to-right direction, and the even-numbered rows of nozzles are in the same position in the left-to-right direction.

[0011] Preferably, the projection adjustment device includes a projection lamp, a slide rail, and a slide rod. The slide rail is located at the top of the water curtain imaging unit, and the length direction of the slide rail is the same as the length direction of the road. One end of the slide rod is fixedly connected to the projection lamp, and the other end of the slide rod is slidably engaged with the slide rail.

[0012] Preferably, when the water curtain imaging unit is installed on an open road, the water curtain imaging unit also includes a sunshade, and the spray device and projection adjustment device are all installed under the sunshade.

[0013] Preferably, the alarm and blocking system also includes a parking section, which is the section of road between the water curtain imaging unit and the water curtain imaging unit along the direction of travel of the road; alarm arrays and loudspeakers are installed on both sides of the road within the parking section.

[0014] Preferably, the alarm and blocking system also includes a deceleration zone, which is the section of the road between Y2 and Y3 behind the water curtain imaging unit along the direction of road travel; warning lights and speed limit signs are installed on both sides of the road within the deceleration zone; wherein, 0 < Y3 < Y2.

[0015] Preferably, the alarm and blocking system also includes a second camera and a warning zone. The warning zone is the section of road from Y1 to Y2 behind the water curtain imaging unit along the direction of travel, where Y2 < Y1. Information boards, loudspeakers, warning lights, and speed limit signs are installed on both sides of the road within the warning zone. The second camera is used to monitor accidents in the parking zone, deceleration zone, and warning zone. All information boards, loudspeakers, warning lights, speed limit signs, and alarm arrays in the parking zone, deceleration zone, and warning zone are electrically connected to the first camera and the second camera.

[0016] Preferably, several warning and blocking systems are set up on the highway, and adjacent warning and blocking systems are seamlessly connected; the end point of the key monitoring section in the current warning and blocking system is the starting point of the warning zone of the next warning and blocking system.

[0017] The beneficial effects of this utility model are as follows:

[0018] (1) The alarm and blocking system of this utility model can effectively alarm and block vehicles on the highway, reducing the occurrence of subsequent chain accidents.

[0019] (2) In an alarm and blocking system of the present invention, the water curtain imaging unit can form a vertical water curtain projection that spans the road to alarm and block vehicles entering the road.

[0020] (3) The alarm and blocking system of this utility model adopts a three-level warning and blocking interval of "warning-deceleration-stop" to effectively block vehicles from entering the key monitoring section from both sides of the road.

[0021] (4) From the moment a vehicle enters the warning zone of the current warning and blocking system, the warning and blocking system of this utility model uses visual and auditory channels to persuade the vehicle to slow down and stop. Even if the vehicle closes its windows and uses its car audio system, making the auditory persuasion ineffective, this utility model can also use warning lights, alarm arrays, and a water curtain projection set on the road in front of the vehicle's direction of travel to persuade the vehicle to slow down and stop through a more direct visual means. Furthermore, because the water curtain projection is vertical and spans across the road, the driver will definitely see it.

[0022] (5) In the spray device of the alarm and blocking system of this utility model:

[0023] ① The liquid storage pipeline is used to reduce the fluctuation of the liquid reaching the water column unit and to provide a stable liquid to the water column unit.

[0024] ② The pressure regulating valve can make the water released from the nozzle form a stable water column, which makes the water curtain projection effect better and avoids the nozzle releasing intermittent water droplets, thus affecting the clarity of the water curtain projection.

[0025] ③ The nozzle row arrangement at the bottom of the liquid storage box ensures that the nozzles in the odd-numbered rows are substitutes for each other, and the nozzles in the even-numbered rows are also substitutes for each other. This way, even if a nozzle is damaged, there will still be a water column at the corresponding position, ensuring the effect of the water curtain projection.

[0026] (6) In this utility model, the actual straight-line distance between the projection lamp and the water screen can be adjusted by sliding the slider on the slide rail, so that the projection brightness can be changed, so as to ensure that the driver can clearly see the water screen projection even when the ambient brightness is high, thus ensuring the alarm and blocking effect of the alarm and blocking system of this utility model.

[0027] (7) The shading canopy set in the water curtain imaging unit has the function of shading and rain protection, so that the water curtain imaging unit of this utility model is not limited to use only in tunnels, but can be used normally on open roads, and has strong versatility. Attached Figure Description

[0028] 1. Information board; 2. Loudspeaker; 3. Warning light; 4. Speed ​​limit sign; 5. Alarm array; 61. First camera; 62. Second camera; 7. Water curtain imaging unit; 71. Sprinkler system; 711. Liquid storage pipe; 712. Water column unit; 7121. Pressure transformer valve; 7122. Liquid storage box; 7123. Nozzle; 72. Projection adjustment device; 721. Projection lamp; 722. Slide rail; 723. Slide bar; 73. Sunshade canopy; 74. Water supply equipment;

[0029] Figure 1 This is a schematic diagram of the structure of the water curtain imaging unit of this utility model;

[0030] Figure 2 This is a schematic diagram of the overall structure of an alarm and blocking system according to the present invention;

[0031] Figure 3 This is a schematic diagram of the spray device.

[0032] Figure 4 This is a schematic diagram of the projection adjustment device from a top-down perspective.

[0033] Figure 5 for Figure 3 Enlarged view of point A in the middle;

[0034] Figure 6 This is a schematic diagram of the nozzle at the bottom of the liquid storage box. Detailed Implementation

[0035] To make the technical solution of this utility model clearer and more explicit, the utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Solutions derived by those skilled in the art through equivalent substitution and conventional reasoning of the technical features of this utility model without creative effort all fall within the protection scope of this utility model.

[0036] The accidents mentioned in this utility model refer not only to traffic accidents, but also to natural disasters and construction projects such as road repairs.

[0037] This invention aims to provide a hardware platform for alarm and barrier systems based on the location of accidents on highways. The alarm and barrier system can be installed on open highways or inside highway tunnels.

[0038] like Figure 2The diagram shows the overall structure of an alarm and obstacle prevention system, including a first camera 61 and a water curtain imaging unit 7. The first camera 61 is positioned above the water curtain imaging unit 7. The first camera 61 monitors key monitoring road sections for accidents. The starting point of the key monitoring road section is the road location corresponding to the water curtain imaging unit 7, and the ending point is the road location corresponding to a distance Y4 behind the water curtain imaging unit 7. Entering vehicles will sequentially pass through the starting and ending points of the key monitoring road section.

[0039] The first camera 61 is electrically connected to the water curtain imaging unit 7. When the first camera 61 detects an accident in the key monitoring section, the water curtain imaging unit 7 is activated to form a vertical water curtain that spans the road. A water curtain projection containing warning characters is formed in front of the vehicle, which then warns and blocks the vehicle from entering.

[0040] The structure of water curtain imaging unit 7 is as follows Figure 1 The image shown is from the perspective of an approaching vehicle, including a spray device 71, a projection adjustment device 72, and a water supply device 74. The water supply device 74 is connected to the spray device 71 via a water pipe and is used to supply water to the spray device 71. The spray device 71 is located on top of the water curtain imaging unit 7 and is used to form a water curtain. The projection adjustment device 72 is located on top of the water curtain imaging unit 7 and is set perpendicular to the water curtain. The projection adjustment device 72 projects onto the water curtain.

[0041] Optionally, the water supply equipment 74 in summer uses tap water or rainwater, while the water supply equipment 74 in winter uses a mixture of water and antifreeze.

[0042] In this invention, the antifreeze is ethylene glycol.

[0043] When the water curtain imaging unit 7 is installed inside the tunnel, the spray device 71 and the projection adjustment device 72 are both located at the top of the tunnel.

[0044] Spraying device 71 Figure 3 and Figure 5 As shown, the system includes a liquid storage pipe 711 and water column units 712. The liquid storage pipe 711 is located at the top of the spray device 71, and its bottom is parallel to the ground. One end of the pipe is connected to a water supply device 74, and the other end is connected to the top of the liquid storage pipe 711. Several adjacent and closely arranged water column units 712 are arranged at the bottom of the liquid storage pipe 711. The liquid storage pipe 711 is used to reduce water fluctuations reaching the water column units 712, providing a stable water supply to the water column units 712 and extending their lifespan. The water column units 712 release water columns downwards to form a water curtain.

[0045] The water column unit 712 consists of, from top to bottom, a pressure regulating valve 7121, a liquid storage box 7122, and a nozzle 7123. Each liquid storage box 7122 is connected to a liquid storage pipe 711 via a pipe, on which a pressure regulating valve 7121 is installed to adjust the water column flow rate and water pressure. Several nozzles 7123 are located at the bottom of the liquid storage box 7122.

[0046] The pressure regulator 7121 enables the water released from the nozzle 7123 to form a stable water column, resulting in a better water curtain projection effect and preventing the nozzle 7123 from releasing intermittent water droplets, which would affect the clarity of the water curtain projection.

[0047] Optionally, the bottom of the liquid reservoir 7122 is provided with three or more rows of nozzles 7123. For example... Figure 6 As shown, adjacent rows of nozzles 7123 are arranged alternately; with the vehicle's direction of travel as the front-to-back direction, each nozzle in the next row is positioned in the gap between adjacent nozzles in the previous row. Odd-numbered rows of nozzles are in the same position in the left-to-right direction, and all even-numbered rows of nozzles are in the same position in the left-to-right direction.

[0048] In this embodiment, the bottom of the liquid storage box 7122 is provided with four rows of nozzles 7123, the spacing between adjacent nozzles 7123 in each row is the same, the diameter of the nozzles 7123 is 4mm, and the spacing between adjacent nozzles in the same row is 30mm.

[0049] The nozzle row arrangement at the bottom of the liquid storage box 7122 of this utility model allows the nozzles at corresponding positions in the odd-numbered rows to substitute for each other, and the nozzles at corresponding positions in the even-numbered rows to also substitute for each other. In this way, even if a nozzle is damaged, there will still be a water column at the corresponding position, ensuring the effect of water curtain projection.

[0050] The projection adjustment device 72 includes a projection lamp 721, a slide rail 722, and a slide bar 723, such as Figure 4 As shown, with Figure 1 If it is the main view, then Figure 4 This is a right-side view. A slide rail 722 is fixedly mounted on the top side of the water curtain imaging unit 7, and its length is parallel to that of the road. One end of a slide rod 723 is fixedly connected to the projection lamp 721, and the other end is slidably engaged with the slide rail 722. The slide rod 723 adjusts the actual straight-line distance d between the projection lamp 721 and the water curtain by sliding along the slide rail 722. Adjusting the actual straight-line distance d between the projection lamp 721 and the water curtain refers to the shortest straight-line distance between the lamp head of the projection lamp 721 and the plane of the water curtain.

[0051] All other things being equal, changing the actual straight-line distance d will change the size and brightness of the projection on the water screen.

[0052] When the water curtain imaging unit 7 is installed inside the tunnel, the slide rail 722 is fixedly installed on the top side of the tunnel.

[0053] Optionally, the water curtain imaging unit 7 also includes a light-shielding canopy 73. The spray device 71 and the projection adjustment device 72 are both located below the light-shielding canopy 73. Both the spray device 71 and the projection adjustment device 72 are covered by the light-shielding canopy 73.

[0054] The sunshade 73's sunshade and rain protection functions mean that the water curtain imaging unit 7 of this utility model is not limited to use only in tunnels, but can also be used normally on open roads.

[0055] In this embodiment, the shading canopy 73 includes a steel arch frame, a PC polycarbonate sheet, and a reinforced concrete canopy wall. The PC polycarbonate sheet is fixedly installed on the top of the steel arch frame, and the bottom of the steel arch frame is fixed in the reinforced concrete canopy wall.

[0056] Optionally, the alarm and obstruction system of this utility model also includes an information board 1, a loudspeaker 2, a warning light 3, a speed limit sign 4, an alarm array 5, and a second camera 62. The road section between Y1 and Y2 in front of the current water curtain imaging unit 7 is designated as the warning zone of the current alarm and blocking system, which is the road section between Y1 and Y2 behind the current water curtain imaging unit 7 along the road's forward direction. The road section between Y2 and Y3 in front of the current water curtain imaging unit 7 is designated as the deceleration zone of the current alarm and blocking system, which is the road section between Y2 and Y3 behind the current water curtain imaging unit 7 along the road's forward direction. The road section between Y3 in front of the current water curtain imaging unit 7 and the current water curtain imaging unit 7 is designated as the parking zone of the current alarm and blocking system, which is the road section between Y3 behind the current water curtain imaging unit 7 along the road's forward direction and the current water curtain imaging unit 7. Wherein, 0 < Y3 < Y2 < Y1. The second camera 62 performs accident monitoring on the warning zone, deceleration zone, and parking zone of the current alarm and blocking system. Information boards 1, loudspeakers 2, warning lights 3, and speed limit signs 4 are installed on both sides of the road within the warning zone. Warning lights 3 and speed limit signs 4 are installed on both sides of the road within the deceleration zone. Alarm arrays 5 and loudspeakers 2 are installed on both sides of the road within the parking zone. All information boards 1, loudspeakers 2, warning lights 3, speed limit signs 4, and alarm arrays 5 within the parking zone, deceleration zone, and warning zone are electrically connected to the first camera 61 and the second camera 62.

[0057] All warning lights 3 and alarms in the alarm array 5 within all zones are set at equal intervals.

[0058] Vehicles entering the system sequentially pass through the warning zone, deceleration zone, and stopping zone of the current alarm barrier system. Each alarm barrier system employs a three-level warning and blocking zone system of "warning-deceleration-stop" to prevent vehicles from entering key monitored road sections.

[0059] In summary, the total length of the road segment where each alarm barrier system is located is S = Y1 + Y2 + Y3 + Y4.

[0060] In this embodiment, Y1 = 2 km, Y2 = 1 km, Y3 = 1 km, and Y4 = 2 km; the length of each section is based on the "Highway Maintenance Safety Operation Regulations" and the "Highway Route Design Specifications".

[0061] Optionally, several warning and blocking systems can be set up on the highway, with seamless connection between adjacent warning and blocking systems. That is, the highway location corresponding to the end of the current warning and blocking system (i.e., the end point of the key monitoring section in the current warning and blocking system) is the beginning of the next warning and blocking system (i.e., the starting point of the warning zone of the next warning and blocking system).

[0062] The alarm blocking methods of the alarm blocking system on highways are described below:

[0063] If the accident occurs in a key monitoring section of the current alarm and barrier system, it will be detected by the first camera 61. At this time, the current alarm and barrier system is activated: the information board 1 in the warning zone explains and plays the location of the accident and the accident situation / scene; the loudspeaker 2 broadcasts a slowdown warning; the warning light 3 flashes to warn; and the speed limit sign 4 displays the first maximum speed. In the deceleration zone, the warning light 3 flashes to warn; and the speed limit sign 4 displays the second maximum speed. In the parking zone, the alarm array 5 sounds and lights an alarm; the loudspeaker 2 warns to stop; and the water curtain imaging unit 7 opens the water curtain and projects the word "Stop" onto it. In this way, vehicles entering the warning zone of the current alarm and barrier system are advised to slow down and stop through visual and auditory means. Even if the vehicle closes its windows and uses its car audio system, making the auditory warning ineffective, this utility model can also use the warning light 3, the alarm array 5, and the water curtain projection set on the road in front of the vehicle's direction of travel to persuade the vehicle to slow down and stop through a more intuitive visual means. Furthermore, since the accident occurred on a key monitoring section of the current alarm and blocking system, this invention is sufficient to dissuade vehicles from slowing down and stopping before reaching the accident site simply by using the three-level warning and blocking interval of the current alarm and blocking system: "warning-deceleration-stop".

[0064] It should be noted that even if the vehicle has its windows closed and is playing music loudly through its car stereo, and the driver cannot see the flashing lights and audible and visual alarms on the roadside, the driver will still see the water curtain projection spanning the road.

[0065] If the accident occurs within the warning zone, deceleration zone, or stopping zone of the current alarm barrier system, it will be detected by the second camera 62. At this time, the warning zone, deceleration zone, or stopping zone of the current alarm barrier system will be activated, and the previous alarm barrier system will also be activated. The situation within each zone after the activation of each alarm barrier system has been described above and will not be repeated here. Based on the above analysis, in order to ensure that the entering vehicle can see the water curtain projection, this utility model also activates the previous alarm barrier system. In this way, the entering vehicle will be advised to slow down and stop when entering the road section of the previous alarm barrier system. Furthermore, the water curtain projection in the previous alarm barrier system will also advise drivers of vehicles with closed windows and using car audio systems to slow down and stop, giving the entering vehicle sufficient time to slow down and stop before reaching the accident point.

[0066] Because some water screen imaging units 7 are used on open roads, although there are light-blocking canopies 73 for shading, the ambient brightness directly affects the image contrast of the water screen projection, which is directly related to the warning effect on drivers. When the brightness of the water screen projection remains constant, the image contrast of the water screen projection is very high at night; however, under clear daylight, the image contrast of the water screen projection drops significantly, and the visual impact on drivers is noticeably less than at night.

[0067] To ensure the warning effect of the water curtain projection, this invention changes the projection brightness of the water curtain imaging unit 7 by adjusting the actual straight-line distance between the projection lamp 721 and the water curtain in real time, so as to ensure the alarm blocking effect when the alarm blocking system is activated.

[0068] Technicians can adjust the actual straight-line distance d between the projection lamp 721 and the water curtain to ensure that the alarm barrier system activated at any time allows the driver to clearly see the water curtain projection from the front end of the current alarm barrier system, thus ensuring the alarm barrier effect of this utility model alarm barrier system.

[0069] Even if the water curtain imaging unit 7 is installed inside the tunnel, the ambient brightness will still have the same effect on the image contrast of the water curtain projection of the water curtain imaging unit 7 installed at the tunnel entrance. Therefore, the alarm blocking effect of the water curtain imaging unit 7 installed inside the tunnel can also be ensured by adjusting the actual straight-line distance d between the projection lamp 721 and the water curtain.

[0070] The technologies, shapes, and structures not described in detail in this utility model are all known technologies. It should also be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. The components or steps in the embodiments of this utility model can be decomposed and / or recombined, and these decompositions and / or recombinations should be considered as equivalent solutions of this application and should all fall within the protection scope of this utility model.

Claims

1. An alarm and obstruction system, comprising a first camera (61) for monitoring accidents on key monitored road sections, characterized in that: It also includes a water curtain imaging unit (7) electrically connected to the first camera (61), the first camera (61) being positioned above the water curtain imaging unit (7); the water curtain imaging unit (7) includes a spray device (71), a projection adjustment device (72), and a water supply device (74); the spray device (71) is located at the top of the water curtain imaging unit (7); the water supply device (74) is connected to the spray device (71) via a water pipe; the spray device (71) releases water downwards to form a water curtain, the water curtain being vertical and spanning across the road; the projection adjustment device (72) is positioned at the top of the water curtain imaging unit (7) and perpendicular to the plane where the water curtain is located, and the projection adjustment device (72) projects onto the water curtain; the starting point of the key monitoring section is the location of the water curtain imaging unit (7) on the road, and the ending point of the key monitoring section is the position Y4 ahead of the water curtain imaging unit (7) along the direction of travel of the road.

2. The alarm and blocking system according to claim 1, characterized in that: The spraying device (71) includes a liquid storage pipe (711) and a water column unit (712); the liquid storage pipe (711) is located at the top of the spraying device (71), and the bottom of the liquid storage pipe (711) is parallel to the ground; the top of the liquid storage pipe (711) is connected to the water supply equipment (74) through a water pipe; several adjacent and closely arranged water column units (712) are provided at the bottom of the liquid storage pipe (711); the water column units (712) release water downward to form a water column, and several water columns are closely arranged to form a water curtain.

3. The alarm and blocking system according to claim 2, characterized in that: The water column unit (712) includes, from top to bottom, a pressure regulating valve (7121), a liquid storage box (7122), and a nozzle (7123); each liquid storage box (7122) and the liquid storage pipe (711) are connected by a pipe, and the pressure regulating valve (7121) is installed on the pipe; several nozzles (7123) are installed at the bottom of the liquid storage box (7122).

4. The alarm and blocking system according to claim 3, characterized in that: The bottom of the liquid storage box (7122) is provided with three or more rows of nozzles (7123), with adjacent rows of nozzles (7123) arranged alternately; with the vehicle's direction of travel as the front and back direction, the odd-numbered rows of nozzles (7123) are in the same position in the left and right directions, and the even-numbered rows of nozzles (7123) are in the same position in the left and right directions.

5. The alarm and blocking system according to claim 1, characterized in that: The projection adjustment device (72) includes a projection lamp (721), a slide rail (722) and a slide rod (723). The slide rail (722) is located on the top of the water curtain imaging unit (7), and the length direction of the slide rail (722) is the same as the length direction of the road. One end of the slide rod (723) is fixedly connected to the projection lamp (721), and the other end of the slide rod (723) is slidably engaged with the slide rail (722).

6. The alarm and blocking system according to claim 1, characterized in that: When the water curtain imaging unit (7) is set on an open road, the water curtain imaging unit (7) also includes a shade canopy (73), and the spray device (71) and projection adjustment device (72) are all set under the shade canopy (73).

7. The alarm and blocking system according to claim 1, characterized in that: The alarm and blocking system also includes a parking section, which is the section of road between Y3 behind the water curtain imaging unit (7) and the water curtain imaging unit (7) along the direction of road travel; alarm arrays (5) and loudspeakers (2) are installed on both sides of the road in the parking section.

8. The alarm and blocking system according to claim 7, characterized in that: The warning and blocking system also includes a deceleration zone, which is the section of the road between Y2 and Y3 behind the water curtain imaging unit (7) along the direction of road travel; warning lights (3) and speed limit signs (4) are installed on both sides of the road within the deceleration zone; where 0 < Y3 < Y2.

9. The alarm and blocking system according to claim 8, characterized in that: The alarm and blocking system also includes a second camera (62) and a warning zone. The warning zone is the section of the road between Y1 and Y2 behind the water curtain imaging unit (7) along the direction of road travel, where Y2 < Y1. Information boards (1), loudspeakers (2), warning lights (3) and speed limit signs (4) are installed on both sides of the road within the warning zone. The second camera (62) is used to monitor accidents in the parking zone, deceleration zone and warning zone. All information boards (1), loudspeakers (2), warning lights (3), speed limit signs (4), and alarm arrays (5) in the parking zone, deceleration zone, and warning zone are electrically connected to the first camera (61) and the second camera (62).

10. The alarm and blocking system according to claim 1, characterized in that: Several warning and barrier systems are set up on the highway, and adjacent warning and barrier systems are seamlessly connected; the end of the key monitoring section in the current warning and barrier system is the starting point of the warning zone of the next warning and barrier system.

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