Movable road disaster night visual projection early warning method and device

Abstract

The invention discloses a movable road disaster night visual projection early warning method and device. The device comprises an electric carrying platform, a fixing device is arranged on the electric carrying platform, a telescopic device is arranged on the fixing device, a rotating device is arranged at the top end of the telescopic device, and a projection device is arranged on the rotating device; the telescopic device and the rotating device are combined for use, so that a projection picture is allowed to be accurately projected to a preset area, the projection accuracy is ensured, and the overall early warning efficiency of the early warning device is remarkably improved; the projection device enables an early warning sign and a signal to be clearly projected to the ground at night, so that a running vehicle can more strikingly receive early warning information, a driver is prompted to take prevention measures such as deceleration or parking, potential traffic accidents are effectively avoided, and the driving safety is improved. The technical problem that the early warning effect of an early warning device in the prior art is not obvious is solved.

Description

Technical Field

[0001] This invention belongs to the field of highway warning devices and relates to a nighttime visual projection early warning method, specifically a mobile nighttime visual projection early warning method and device for highway disasters. Background Technology

[0002] With the continuous expansion of my country's highway network, reaching a total mileage of 5.4368 million kilometers by the end of 2023, highway traffic safety and emergency response capabilities face severe challenges. Especially against the backdrop of frequent extreme weather events and exacerbated geological disasters such as landslides and mudslides, sudden road damage incidents have increased significantly, highlighting the limitations of traditional fixed early warning devices. Specifically, these limitations manifest as rigid deployment and insufficient timeliness. Existing warning signs are mostly fixed installations, unable to be dynamically adjusted according to the location of the disaster. After a disaster, emergency personnel must temporarily move equipment to the scene, which is time-consuming and labor-intensive, resulting in a serious delay in the transmission of warning information and making it difficult to give drivers time to react. At night and in low-visibility environments, traditional signs rely on passive reflection or limited lighting, significantly reducing their visibility and making it difficult for drivers to detect dangerous areas in time, easily leading to secondary accidents. Furthermore, the adjustment capabilities are limited; existing mobile warning devices generally lack fine-tuning functions. For example, the height, angle, and coverage of projection equipment often rely on manual estimation. The existing mobile devices are difficult to adapt to complex terrain or multi-lane scenarios. Although some devices have simple telescopic structures, they lack multi-level linkage and locking mechanisms, resulting in poor stability and susceptibility to vibration and displacement, which can lead to blurry or misaligned projected images. They also suffer from insufficient coverage of multiple lanes. Traditional projection technology has a fixed focal length and cannot dynamically adjust the projection width according to the number of lanes. In two-way six-lane or wider road sections, a single projection lamp cannot cover all lanes, resulting in blind spots in some areas. Furthermore, they have shortcomings in power and mobility. Existing mobile devices mostly rely on external power sources or small batteries, which have limited endurance. They also lack an integrated transportation platform, making it difficult to deploy quickly and flexibly in complex road conditions.

[0003] To address the aforementioned issues, while recent research has attempted to introduce mobile projection technology, key technological bottlenecks remain. These include the reliance on manual operation for height and angle adjustment, resulting in low precision; insufficient rigidity of the telescopic structure leading to swaying; and low integration between the power system and the transport platform, making it difficult to meet emergency response requirements. Based on these shortcomings, there is an urgent need for a highly integrated, rapidly deployable intelligent early warning system capable of arriving at the scene immediately after a disaster, accurately projecting high-brightness warning information onto the target area using multi-degree-of-freedom mechanical structures and adaptive optics technology.

[0004] Therefore, there is an urgent need to design a mobile nighttime visual projection early warning method and device for highway disasters. This method deeply integrates an electric transport platform, a multi-stage telescopic mechanism, a dual-axis rotating structure, and an adjustable focal length projection device, overcoming the key shortcomings of existing technologies in terms of mobility, stability, and adaptability to multiple scenarios, and providing an innovative solution for nighttime emergency early warning of highways. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a mobile method and device for nighttime visual projection early warning of highway disasters, so as to solve the technical problem that the early warning effect of the existing early warning device is not obvious.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A mobile road disaster nighttime visual projection early warning device includes an electric transport platform, a fixing device on the electric transport platform, a telescopic device on the fixing device, a rotating device at the top of the telescopic device, and a projection device on the rotating device.

[0008] The telescopic device includes an outer telescopic rod disposed in the fixed device, a middle telescopic rod fixedly disposed at the top of the outer telescopic rod, and an inner telescopic rod slidably disposed inside the middle telescopic rod; the bottom of the inner telescopic rod extends into the outer telescopic rod; a pair of outer toothed racks are disposed on the inner wall of the outer telescopic rod, and a pair of inner toothed racks are disposed on the outer wall of the inner telescopic rod.

[0009] A pair of telescopic motors are installed on the inner telescopic rod that extends into the outer telescopic rod. Each of the two telescopic motors has a telescopic gear on its output shaft. The two sides of each telescopic gear mesh with the outer rack and the inner rack, respectively.

[0010] The rotating device includes a base plate fixed to the top of the inner telescopic rod, and a first rotating structure and a second rotating structure are provided on the base plate; the first rotating structure includes a transverse ratchet rotatably mounted on the base plate and a pair of transverse fixing buckles, the pair of transverse fixing buckles being distributed on both sides of the transverse ratchet and engaging with the transverse ratchet; the second rotating structure includes three support arms fixed on the transverse ratchet, and the top of the support arms is provided with a rotating shaft.

[0011] The rotating shaft includes a housing, within which a vertical drive motor is housed. A pair of vertical ratchet wheels are mounted on the output shaft of the vertical drive motor, and a projection device is also mounted on the output shaft. A crossbar is movably mounted within the housing, and a pair of vertical latches are mounted on the crossbar, each latch engaging with one of the vertical ratchet wheels. A first protrusion is located on the inner wall of the housing, and a second protrusion is located on the crossbar. A spring is positioned between the first and second protrusions. A motor switch is located on the outer wall of the housing.

[0012] This invention also includes the following technical features:

[0013] The electric transport platform includes a support platform. A first rotating shaft and a second rotating shaft are arranged parallel to each other at the bottom of the support platform. A drive wheel is provided at both ends of the first rotating shaft, and a driven wheel is provided at both ends of the second rotating shaft. A drive motor is provided at the bottom of the support platform. A first gear is provided on the output shaft of the drive motor, and a second gear is provided on the first rotating shaft. The second gear meshes with the first gear.

[0014] The upper part of the inner section telescopic rod is provided with multiple pairs of fixing holes at equal intervals, and the upper end of the middle section telescopic rod is provided with a fixing buckle.

[0015] The fixing device includes a base, the base including a disc disposed on the support platform and a cylindrical mounting seat disposed on the disc, and the outer telescopic rod is disposed in the cylindrical mounting seat.

[0016] The disc is fixed to the support platform by screw number one, and the cylindrical mounting base is fixed to the outer telescopic rod by screw number two.

[0017] A mobile nighttime visual projection early warning method for highway disasters, based on the mobile nighttime visual projection early warning device for highway disasters, includes the following steps:

[0018] Step 1: Detect that the highway has been damaged and is impassable, and dispatch the mobile highway damage nighttime visual projection early warning device to the fire location.

[0019] Step 2: Calculate and adjust the telescopic distance of the telescopic device;

[0020] Step 3: Determine the projection distance S based on the number of lanes, lane width, and telescopic distance of the telescopic device;

[0021] Step 4: Turn on the projection device to project the warning message onto the ground.

[0022] In step 2, the total telescopic distance L of the telescopic device is calculated according to the following formula. Total ,

[0023] L Total =L1+L2+L3

[0024] L2 = p i θ i

[0025] in:

[0026] L1 is the length of the outer telescopic rod, in cm;

[0027] L2 is the length of the middle section of the telescopic rod, in cm;

[0028] L3 is the length of the inner telescopic rod, in cm;

[0029] θ i The number of revolutions of the telescopic gear;

[0030] p i , where is the circumference of the telescopic gear, in cm;

[0031] Step 3 specifically includes the following steps:

[0032] Q1, calculate the projection angle α, ° of the projection device according to the following formula;

[0033]

[0034] in:

[0035] H is the height between the bottom of the outer section of the telescopic pole and the ground, in cm;

[0036] D is the distance in cm between the projection point of the projection device on the ground and the location where the projection is needed;

[0037] Q2, calculate the projection distance S between the projection device and the location point to be projected according to the following formula;

[0038] S = D·sin(α).

[0039] Compared with the prior art, the beneficial technical effects of this invention are:

[0040] (I) The device of the present invention includes an electric transport platform, a fixing device, a telescopic device, a rotating device, and a projection device. The combined use of the telescopic device and the rotating device allows the projected image to be accurately projected onto a predetermined area. This not only ensures the accuracy of the projection but also significantly improves the overall warning effectiveness of the warning device. The projection device enables the warning signs and signals to be clearly projected onto the ground at night, so that vehicles in motion can receive the warning information more conspicuously, prompting drivers to take preventive measures such as slowing down or stopping, effectively avoiding potential traffic accidents, and solving the technical problem of the insignificant warning effect of the warning device in the prior art.

[0041] (II) When set up on roads with different numbers of lanes, the focal length, projection angle and projection height of the projection lamp can be adjusted to match different projection widths, thereby alerting vehicles traveling in all lanes.

[0042] (III) Compared with traditional roadside warning signs, the warning device of the present invention has high flexibility and can be quickly deployed to any location that needs warning, effectively reducing the risk of secondary accidents after a disaster. Attached Figure Description

[0043] Figure 1 This is a flowchart of the early warning method in this invention;

[0044] Figure 2 This is a schematic diagram of the early warning device in this invention;

[0045] Figure 3 This is a schematic diagram of the electric transport platform of the early warning device of the present invention;

[0046] Figure 4 This is a schematic diagram of the fixing device structure of the early warning device of the present invention;

[0047] Figure 5 This is a schematic diagram of the telescopic device structure of the early warning device of the present invention;

[0048] Figure 6 This is a three-dimensional schematic diagram of the telescopic device of the early warning device of the present invention;

[0049] Figure 7 This is a schematic diagram of the first rotating structure of the early warning device of the present invention;

[0050] Figure 8 This is a schematic diagram of the second rotating structure of the early warning device of the present invention;

[0051] Figure 9 This is a partial schematic diagram of the second rotating structure of the early warning device of the present invention.

[0052] The meanings of the labels in the diagram are as follows: 1. Electric transport platform; 2. Fixed device; 3. Telescopic device; 4. Rotating device; 5. Projection device.

[0053] Drive wheel 1-2, drive motor 1-3, driven wheel 1-4, first rotating shaft 1-5, second rotating shaft 1-6, first gear 1-7, second gear 1-8;

[0054] Base 2-1, screw #2 2-2, screw #1 2-3;

[0055] 2-1-1 disc, 2-1-2 cylindrical mounting base;

[0056] Outer telescopic rod 3-1, middle telescopic rod 3-2, inner telescopic rod 3-3, outer rack 3-4, telescopic gear 3-5, inner rack 3-6 (engagement), telescopic motor 3-7, fixing hole 3-8, fixing buckle 3-9;

[0057] First rotating structure 4-1, second rotating structure 4-2, support arm 4-3, rotating shaft 4-4, base plate 4-5;

[0058] Transverse ratchet 4-1-1, transverse retaining buckle 4-1-2;

[0059] 4-4-1 outer casing, 4-4-2 horizontal bar, 4-4-3 vertical ratchet, 4-4-4 vertical buckle, 4-4-5 vertical drive motor, 4-4-6 motor switch, 4-4-7 first protrusion, 4-4-8 second protrusion, 4-4-9 spring;

[0060] The specific content of the present invention will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0061] It should be noted that, unless otherwise specified, all components in this invention are those known in the art.

[0062] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0063] This invention discloses a mobile nighttime visual projection early warning device for highway disasters, such as... Figures 2-9 As shown, it includes an electric transport platform 1, a fixing device 2 is provided on the electric transport platform 1, a telescopic device 3 is provided on the fixing device 2, a rotating device 4 is provided at the top of the telescopic device 3, and a projection device 5 is provided on the rotating device 4.

[0064] The telescopic device 3 includes an outer telescopic rod 3-1 installed in the fixed device 2, a middle telescopic rod 3-2 fixedly installed at the top of the outer telescopic rod 3-1, an inner telescopic rod 3-3 slidably installed inside the middle telescopic rod 3-2, and the bottom of the inner telescopic rod 3-3 extending into the outer telescopic rod 3-1.

[0065] A pair of outer racks 3-4 are provided on the inner wall of the outer telescopic rod 3-1, and a pair of inner racks 3-6 are provided on the outer wall of the inner telescopic rod 3-3.

[0066] A pair of telescopic motors 3-7 are installed on the inner telescopic rod 3-3 that extends into the outer telescopic rod 3-1. Each pair of telescopic motors 3-7 has a telescopic gear 3-5 on its output shaft. The two sides of each telescopic gear 3-5 mesh with the outer rack 3-4 and the inner rack 3-6, respectively.

[0067] The rotating device 4 includes a base plate 4-5 fixed to the top of the inner telescopic rod 3-3. The base plate 4-5 is provided with a first rotating structure 4-1 and a second rotating structure 4-2. The first rotating structure 4-1 includes a transverse ratchet 4-1-1 rotatably mounted on the base plate 4-5 and a pair of transverse fixing buckles 4-1-2. The pair of transverse fixing buckles 4-1-2 are distributed on both sides of the transverse ratchet 4-1-1 and are engaged with the transverse ratchet 4-1-1.

[0068] The second rotating structure 4-2 includes three support arms 4-3 fixed on the transverse ratchet 4-1-1, and the top of the support arms 4-3 is provided with a rotating shaft 4-4.

[0069] The rotating shaft 4-4 includes a housing 4-4-1, a vertical drive motor 4-4-5 is installed inside the housing 4-4-1, a pair of vertical ratchet wheels 4-4-3 are installed on the output shaft of the vertical drive motor 4-4-5, and a projection device 5 is also installed on the output shaft of the vertical drive motor 4-4-5.

[0070] A crossbar 4-4-2 is movably installed inside the outer casing 4-4-1. A pair of vertical latches 4-4-4 are provided on the crossbar 4-4-2. The pair of vertical latches 4-4-4 respectively cooperate with a pair of vertical ratchet wheels 4-4-3.

[0071] A first protrusion 4-4-7 is provided on the inner wall of the outer casing 4-4-1, a second protrusion 4-4-8 is provided on the crossbar 4-4-2, and a spring 4-4-9 is provided between the first protrusion 4-4-7 and the second protrusion 4-4-8.

[0072] A motor switch 4-4-6 is installed on the outer wall of the outer casing 4-4-1.

[0073] In the above scheme, the fixing device 2 of the electric transport platform 1 can securely mount the telescopic device 3, the rotating device 4, and the projection device 5 onto the electric transport platform. The built-in battery of the electric transport platform 1 provides the necessary power support for these devices. In emergency situations such as highway disasters, the electric transport platform 1 can be used to quickly transport the early warning device to a designated location along a predetermined route. Upon arrival, the nighttime visual projection early warning device for highway disasters is precisely deployed through control software to achieve effective early warning for passing vehicles.

[0074] The telescopic device 3 is located on the base 1 and consists of three telescopic rods to achieve height adjustment and positioning of the device. This design ensures the telescopic stability and accuracy of the telescopic device.

[0075] The middle telescopic rod 3-2 of the telescopic device 3 is nested inside the outer telescopic rod 3-1. Two telescopic gears 3-5 mounted on the inner telescopic rod are driven by a telescopic motor 3-7, thus achieving precise control of the telescopic rod's extension and retraction. The inner telescopic rod 3-3 is designed to be housed inside the middle telescopic rod 3-2, and is equipped with an inner rack 3-6 on its outer side, meshing with the telescopic gears 3-5 to enhance the mechanical stability and synchronization of the entire telescopic mechanism. By adjusting the telescopic gears 3-5 within the telescopic device, and through the movement of the telescopic gears 3-5 on the inner rack 3-6 and the outer rack 3-4, the vertical extension and retraction of the entire telescopic device is provided, ensuring that the telescopic device can be accurately fixed in a preset position.

[0076] The first rotating structure 4-1 is disc-shaped and provides horizontal rotation for the projection device. It is operated manually. When a spiral rotation is required, the horizontal fixing buckle 4-1-2 can be pushed back first, and then the horizontal ratchet 4-1-1 can be manually adjusted to rotate. After rotating to a reasonable angle, the horizontal fixing buckle 4-1-2 can be pushed back to lock the first rotating structure.

[0077] The second rotating structure 4-2 provides vertical rotation for the projection device 5. When vertical adjustment of the projection device 5 is required, firstly, the vertical ratchet 4-4-3 is unlocked by pressing the vertical latch 4-4-4, allowing the internal components of the rotating structure to rotate freely. Then, the vertical drive motor switch 4-4-6 is activated, engaging the vertical drive motor 4-4-5. The operation of the vertical drive motor 4-4-5 will drive the vertical ratchet 4-4-3 to rotate synchronously to the desired vertical angle. Once the rotating structure reaches the predetermined position, the operator must turn off the vertical drive motor switch 4-4-6 to cut off the power and stop the motor. Next, the previously pressed vertical latch 4-4-4 is released. At this time, the spring 4-4-9 inside the vertical latch 4-4-4 will automatically activate, causing the vertical latch 4-4-4 to return to its original position, thereby relocking the vertical ratchet 4-4-3 and ensuring that the second rotating structure 4-2 is stable in the adjusted position.

[0078] The electric transport platform 1 includes a support platform. A first rotating shaft 1-5 and a second rotating shaft 1-6 are arranged parallel to each other at the bottom of the support platform. A drive wheel 1-2 is arranged at both ends of the first rotating shaft 1-5, and a driven wheel 1-4 is arranged at both ends of the second rotating shaft 1-6. A drive motor 1-3 is arranged at the bottom of the support platform. A first gear 1-7 is arranged on the output shaft of the drive motor 1-3, and a second gear 1-8 is arranged on the first rotating shaft 1-5. The second gear 1-8 meshes with the first gear 1-7.

[0079] In the above technical solution, when the electric transport platform 1 moves, the drive motor 1-3 serves as the power source, driving the drive wheel 1-2 to rotate, thereby providing forward power for the entire electric transport platform 1. The power is transmitted to the driven wheel 1-4 through the first rotating shaft 1-5, ensuring the stable movement of the platform. In addition, the driven wheel 1-4 has a steering function, allowing the platform to flexibly adjust its direction of travel, ensuring that it can travel smoothly and accurately to the predetermined position under various road conditions. This greatly improves the mobility and adaptability of the device, enabling it to be quickly deployed and function in emergencies such as road disasters.

[0080] The upper part of the inner section telescopic rod 3-3 is provided with multiple pairs of fixing holes 3-8 at equal intervals, and the upper end of the middle section telescopic rod 3-2 is provided with fixing buckles 3-9.

[0081] In the above technical solution, when the telescopic device is extended to the predetermined position, the fixing buckle 3-9 is embedded in the fixing hole 3-8 to achieve stable positioning of the telescopic device.

[0082] The fixing device 2 includes a base 2-1, which includes a disc 2-1-1 set on a support platform and a cylindrical mounting seat 2-1-2 set on the disc 2-1-1. An outer telescopic rod 3-1 is provided in the cylindrical mounting seat 2-1-2.

[0083] Preferably, the middle part of the base 2-1 is a hollow area, providing space for the power and data transmission lines of the telescopic device and the projection device.

[0084] The disc 2-1-1 is fixed to the support platform 1 by screw No. 1 2-3, and the cylindrical mounting base 2-1-2 is fixed to the outer telescopic rod 3-1 by screw No. 2 2-2.

[0085] In the above technical solution, screw 2-3 ensures that the fixing device 2 is securely installed on the electric transport platform 1, and screw 2-2 ensures that the telescopic device 3 is securely installed on the fixing device 2.

[0086] This invention also provides a mobile method for nighttime visual projection early warning of highway disasters, such as... Figure 1 As shown, the mobile highway disaster nighttime visual projection early warning device includes the following steps:

[0087] Step 1: If a road is damaged and impassable, a mobile road damage nighttime visual projection early warning device is dispatched to the fire location.

[0088] Step 2: Calculate and adjust the telescopic distance of the telescopic device 3;

[0089] Step 3: Determine the projection distance S based on the number of lanes, lane width, and telescopic distance of telescopic device 3;

[0090] Step 4: Turn on the projection device 5 to project the warning information onto the ground.

[0091] In step 2, the total telescopic distance L of the telescopic device 3 is calculated according to the following formula. Total ,

[0092] L Total =L1+L2+L3

[0093] L2 = p i θ i

[0094] in:

[0095] L1 is the length of the outer telescopic rod 3-1, in cm;

[0096] L2 is the length of the middle section telescopic rod 3-2, in cm;

[0097] L3 is the length of the inner telescopic rod 3-3, in cm;

[0098] θ i This refers to the number of rotations of telescopic gears 3-5;

[0099] p i The circumference of telescopic gear 3-5 is in cm;

[0100] Step 3 specifically includes the following steps:

[0101] Q1, calculate the projection angle α, ° of projection device 5 according to the following formula;

[0102]

[0103] in:

[0104] H is the height between the bottom of the outer section telescopic rod 3-1 and the ground, in cm;

[0105] D is the distance in cm between the projection point of the projection device 5 on the ground and the location where the projection needs to be made.

[0106] Q2, calculate the projection distance S between the projection device 5 and the location point to be projected according to the following formula;

[0107] S = D·sin(α).

[0108] In the above technical solution, the projection angle can be adjusted by adjusting the telescopic device 3 to change the length of the telescopic rod. Furthermore, the projection range can be adjusted by adjusting the focal length of the projection lamp in the projection device 5. In roads with different numbers of lanes, the projection width A can be adjusted to accommodate changes in projection width due to the different number of lanes.

Claims

1. A portable nighttime visual projection early warning device for highway disasters, characterized in that, It includes an electric transport platform (1), a fixing device (2) is provided on the electric transport platform (1), a telescopic device (3) is provided on the fixing device (2), a rotating device (4) is provided at the top of the telescopic device (3), and a projection device (5) is provided on the rotating device (4). The telescopic device (3) includes an outer telescopic rod (3-1) disposed in the fixed device (2), a middle telescopic rod (3-2) fixedly disposed at the top of the outer telescopic rod (3-1), an inner telescopic rod (3-3) slidably disposed inside the middle telescopic rod (3-2); the bottom of the inner telescopic rod (3-3) extends into the outer telescopic rod (3-1); a pair of outer toothed racks (3-4) are disposed on the inner wall of the outer telescopic rod (3-1), and a pair of inner toothed racks (3-6) are disposed on the outer wall of the inner telescopic rod (3-3); A pair of telescopic motors (3-7) are provided on the inner telescopic rod (3-3) that extends into the outer telescopic rod (3-1). Each pair of telescopic motors (3-7) has a telescopic gear (3-5) on its output shaft. The two sides of each telescopic gear (3-5) mesh with the outer rack (3-4) and the inner rack (3-6) respectively. The rotating device (4) includes a base plate (4-5) fixed to the top of the inner telescopic rod (3-3). The base plate (4-5) is provided with a first rotating structure (4-1) and a second rotating structure (4-2). The first rotating structure (4-1) includes a transverse ratchet (4-1-1) rotatably mounted on the base plate (4-5) and a pair of transverse fixing buckles (4-1-2). The pair of transverse fixing buckles (4-1-2) are distributed on both sides of the transverse ratchet (4-1-1) and are engaged with the transverse ratchet (4-1-1). The second rotating structure (4-2) includes three support arms (4-3) fixed on the transverse ratchet (4-1-1). The top of the support arms (4-3) is provided with a rotating shaft (4-4). The rotating shaft (4-4) includes a housing (4-4-1), within which a vertical drive motor (4-4-5) is installed. A pair of vertical ratchet wheels (4-4-3) are mounted on the output shaft of the vertical drive motor (4-4-5). A projection device (5) is also mounted on the output shaft of the vertical drive motor (4-4-5). A crossbar (4-4-2) is movably installed within the housing (4-4-1), and a pair of vertical latches (4-4-3) are mounted on the crossbar (4-4-2). 4-4-4), a pair of vertical buckles (4-4-4) respectively engage with a pair of vertical ratchet wheels (4-4-3); a first protrusion (4-4-7) is provided on the inner wall of the outer shell (4-4-1), a second protrusion (4-4-8) is provided on the crossbar (4-4-2), and a spring (4-4-9) is provided between the first protrusion (4-4-7) and the second protrusion (4-4-8); a motor switch (4-4-6) is provided on the outer wall of the outer shell (4-4-1).

2. The portable highway disaster nighttime visual projection early warning device as described in claim 1, characterized in that, The electric transport platform (1) includes a support platform. A first rotating shaft (1-5) and a second rotating shaft (1-6) are arranged parallel to each other at the bottom of the support platform. A drive wheel (1-2) is arranged at both ends of the first rotating shaft (1-5), and a driven wheel (1-4) is arranged at both ends of the second rotating shaft (1-6). A drive motor (1-3) is arranged at the bottom of the support platform. A first gear (1-7) is arranged on the output shaft of the drive motor (1-3), and a second gear (1-8) is arranged on the first rotating shaft (1-5). The second gear (1-8) meshes with the first gear (1-7).

3. The portable highway disaster nighttime visual projection early warning device as described in claim 1, characterized in that, The upper part of the inner section telescopic rod (3-3) is provided with multiple pairs of fixing holes (3-8) at equal intervals, and the upper end of the middle section telescopic rod (3-2) is provided with a fixing buckle (3-9).

4. The portable highway disaster nighttime visual projection early warning device as described in claim 2, characterized in that, The fixing device (2) includes a base (2-1), the base (2-1) includes a disc (2-1-1) disposed on the support platform and a cylindrical mounting seat (2-1-2) disposed on the disc (2-1-1), and the outer telescopic rod (3-1) is disposed in the cylindrical mounting seat (2-1-2).

5. The portable highway disaster nighttime visual projection early warning device as described in claim 1, characterized in that, The disc (2-1-1) is fixed to the support platform 1 by screw No. 1 (2-3), and the cylindrical mounting base (2-1-2) is fixed to the outer telescopic rod (3-1) by screw No. 2 (2-2).

6. A mobile nighttime visual projection early warning method for highway disasters, based on the mobile nighttime visual projection early warning device for highway disasters according to any one of claims 1 to 5, comprising the following steps: Step 1: Detect that the highway has been damaged and is impassable, and dispatch the mobile highway damage nighttime visual projection early warning device to the fire location. Step 2: Calculate and adjust the telescopic distance of the telescopic device (3); Step 3: Determine the projection distance S based on the number of lanes, lane width, and telescopic distance of the telescopic device (3); Step 4: Turn on the projection device (5) to project the warning information onto the ground.

7. The portable highway disaster nighttime visual projection early warning device as described in claim 6, characterized in that, In step 2, the total telescopic distance L of the telescopic device (3) is calculated according to the following formula. Total , L Total L1+L2+L3 L2=p i θ i in: L1 is the length of the outer telescopic rod (3-1), in cm; L2 is the length of the middle section of the telescopic rod (3-2), in cm; L3 is the length of the inner telescopic rod (3-3), in cm; θ i The number of revolutions of the telescopic gear (3-5); p i The circumference of the telescopic gear (3-5) is in cm.

8. The portable highway disaster nighttime visual projection early warning device as described in claim 6, characterized in that, Step 3 specifically includes the following steps: Q1, calculate the projection angle α of the projection device (5) according to the following formula; in: H is the height between the bottom of the outer section of the telescopic rod (3-1) and the ground, in cm; D is the distance, in cm, between the projection point of the projection device (5) on the ground and the location point where the projection is needed; Q2, calculate the projection distance S between the projection device (5) and the position point to be projected according to the following formula; S = D·sin(α).

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