Glass fiber grating intelligent laying trolley and construction method

Abstract

The invention relates to the technical field of road construction machinery, in particular to an intelligent glass fiber grating laying trolley and a construction method. The coating mechanism is used for quantitatively coating a binder on the pavement; the unwinding mechanism is used for bearing and releasing the glass fiber grating and controlling the releasing tension of the glass fiber grating; the guide mechanism guides and flattens the glass fiber grating and then lays the glass fiber grating on the binder layer; the pressing mechanism is used for rolling the glass fiber grating after the glass fiber grating is laid; the paving process of the glass fiber grating sequentially comprises the continuous working procedures of adhesive coating, grating paving and rolling; and the datum line tracking mechanism comprises a sensor for identifying a road datum line and a steering control unit for adjusting the advancing direction of the trolley based on a sensor signal. The glass fiber grating output at a constant speed through the unwinding mechanism is sequentially subjected to continuous procedures of adhesive coating, grating laying and rolling, so that the laying efficiency and quality are improved, and the construction time and the labor cost are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of road construction machinery, and particularly relates to a glass fiber grid intelligent laying trolley and a construction method. BACKGROUND

[0002] The glass fiber grid is a kind of reinforcing material used in road crack prevention and bridge deck waterproofing engineering, and has the advantages of high tensile strength and good crack resistance. At present, the laying of the glass fiber grid mainly relies on manual operation, and multiple people are required to cooperate to spread, flatten, apply adhesive and attach to the road surface during construction.

[0003] However, the manual laying method has the problems of low construction efficiency and high labor intensity, mainly manifested in that the glass fiber grid is prone to wrinkles and uneven laying, affecting the crack resistance effect, or the adhesive is not uniformly applied, resulting in local voids or insufficient infiltration and other technical problems. Most of the laying equipment in the prior art is large in size, complex in structure and high in cost, and is not suitable for the glass fiber grid which is light and limited in width.

[0004] Therefore, a special mechanical device suitable for glass fiber grid laying is urgently needed, which can realize mechanized and automated construction to improve the laying efficiency and ensure the laying quality, and is suitable for complex construction environment to realize efficient, accurate and safe intelligent laying of the glass fiber grid. SUMMARY

[0005] In view of at least one of the above technical problems, the present application provides a glass fiber grid intelligent laying trolley and a construction method, which uses an automatic mechanical structure to improve the construction efficiency and laying quality.

[0006] According to a first aspect of the present application, a glass fiber grid intelligent laying trolley is provided, comprising: a vehicle frame provided with traveling wheels at the bottom; a coating mechanism, a unwinding mechanism, a guide mechanism and a pressing mechanism are sequentially arranged from front to back along the traveling direction of the vehicle frame; the coating mechanism is used for quantitatively coating adhesive on the road surface; the unwinding mechanism is used for bearing and releasing the glass fiber grid and controlling the release tension of the glass fiber grid; the guide mechanism guides the glass fiber grid to be spread and laid on the adhesive layer; the pressing mechanism is used for rolling the glass fiber grid after laying to make the glass fiber grid adhere to the adhesive and the road surface; the laying process of the glass fiber grid sequentially experiences the continuous processes of coating adhesive, laying grid and rolling; a reference line tracking mechanism, comprising a sensor for identifying the reference line of the road surface and a steering control unit for adjusting the traveling direction of the trolley based on the sensor signal, the steering control unit controls the traveling wheels.

[0007] In some embodiments of the present application, the unwinding mechanism comprises an unwinding shaft rotatably connected to the vehicle frame, a shaft driving assembly for driving the unwinding shaft to unwind at a constant speed, and a tension controller for applying a rotational resistance to the unwinding shaft, the tension controller being configured to provide a damping force matching the travel speed of the coating mechanism.

[0008] In some embodiments of the present application, the guiding mechanism comprises at least one set of guiding rollers, and a guiding plate disposed on the guiding rollers and having an adjustable spacing in the axial direction of the guiding rollers.

[0009] In some embodiments of the present application, the coating mechanism comprises a storage tank, and a plurality of spray heads uniformly disposed on the side of the storage tank facing the road surface.

[0010] In some embodiments of the present application, the coating mechanism further comprises a first scraper and a second scraper disposed at the rear end of the spray heads in the travel direction of the vehicle frame, the first scraper and the second scraper being disposed in parallel, the side edges of the first scraper and the second scraper facing the road surface being adjustably spaced from the road surface.

[0011] In some embodiments of the present application, the side of the first scraper facing the road surface has uniformly distributed tooth-shaped notches, and the side of the second scraper facing the road surface is flat.

[0012] In some embodiments of the present application, the first scraper and the second scraper are further provided with a buffer suspension assembly between the first scraper and the second scraper and the vehicle frame, the buffer suspension assembly comprising a guiding post fixedly connected to the vehicle frame, a sliding member slidably connected to the guiding post, one end of the sliding member being fixedly connected to the first scraper and the second scraper, and an elastic compression member between the sliding member and the guiding post.

[0013] In some embodiments of the present application, the pressing mechanism comprises a plurality of pressing roller sets, the pressing roller sets being relatively closer or farther away from the road surface for pressing the fiberglass grid laid on the adhesive.

[0014] In some embodiments of the present application, the surface of the pressing roller sets is provided with an elastic material layer.

[0015] According to the second aspect of the present application, a fiberglass grid intelligent laying construction method is also provided, comprising the following steps: installing the fiberglass grid roll on the unwinding mechanism, and passing the starting end of the fiberglass grid through the guiding mechanism and to the road surface position under the pressing mechanism; adding the adhesive to the coating mechanism, and adjusting the guiding mechanism to adapt to the width of the fiberglass grid; starting the reference line tracking mechanism, aligning the sensor with the preset reference line on the road surface, and setting the travel path; The trolley is driven or pulled forward at a constant speed along the baseline. The coating mechanism applies adhesive to the road surface in a quantitative manner. The unwinding mechanism releases and guides the fiberglass grid, which is then laid flat on the adhesive layer. The pressing mechanism rolls the laid fiberglass grid to make it adhere tightly to the adhesive layer and the road surface. During the forward movement, the tension of the fiberglass grid in the unwinding mechanism is released to match the forward speed of the trolley and keep it flat. The travel direction is adjusted in real time by the baseline tracking mechanism to keep the laying straight.

[0016] The beneficial effects of this invention are as follows: The invention uses a coating mechanism to precisely apply adhesive to the road surface, ensuring uniform coverage of the adhesive material; an unwinding mechanism releases the fiberglass grid and controls its release tension to ensure smooth unfolding; under the action of a guiding mechanism, the fiberglass grid is accurately guided and flattened onto the adhesive layer, and finally rolled by a pressing mechanism to firmly adhere it to the road surface, ensuring high-quality and high-strength paving results; it achieves an automated construction process, reducing manual intervention and errors, and integrates a baseline tracking mechanism that uses sensors to identify the road baseline and adjust the walking direction, making the paving process more precise and adaptable to complex construction environments. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the intelligent fiberglass grid laying vehicle in an embodiment of the present invention; Figure 2 This is a structural schematic diagram of the intelligent fiberglass grid laying vehicle from another perspective in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the intelligent fiberglass grid laying trolley buffer suspension assembly in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the first scraper and the second scraper in the intelligent fiberglass grid laying trolley in an embodiment of the present invention; Figure 5 This is a schematic diagram of the guiding mechanism in the intelligent fiberglass grid laying trolley in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the nozzle and the first scraper in the intelligent fiberglass grid laying trolley in an embodiment of the present invention; Figure 7This is a step diagram illustrating the intelligent laying method of fiberglass grid in an embodiment of the present invention.

[0019] Reference numerals: 1. Frame; 11. Wheel; 2. Coating mechanism; 21. Storage bin; 22. Nozzle; 23. First scraper; 23a. Toothed notch; 24. Second scraper; 25. Buffer suspension assembly; 25a. Guide column; 25b. Elastic compression component; 3. Unwinding mechanism; 31. Unwinding shaft; 4. Guiding mechanism; 41. Guide roller; 42. Guide plate; 5. Pressing mechanism; 51. Pressing roller group; 6. Baseline tracking mechanism. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] like Figures 1 to 6 The fiberglass grille intelligent laying trolley shown includes: The frame 1 has wheels 11 at the bottom. It should be noted that the frame 1 can take many forms, such as folding, modular and detachable, or a one-piece structure. Similarly, the wheels can also take many forms, such as omnidirectional wheels or steerable wheels; the wheels can also be pneumatic tires, rubber tires, or tracks, etc.

[0024] Along the direction of travel of the frame 1, from front to back, there are a coating mechanism 2, an unwinding mechanism 3, a guiding mechanism 4 and a pressing mechanism 5. The coating unit 2 is used to apply adhesive to the road surface in a measured amount. The coating unit 2 can take many forms, such as spray coating, roller coating, or drip coating. Similarly, the width of the coating area of ​​the coating unit 2 can be set according to the actual width of the fiberglass grid.

[0025] The unwinding mechanism 3 is used to carry out the release of the fiberglass grid and control the release tension of the fiberglass grid; it should be noted that the unwinding speed of the unwinding mechanism 3 can be controlled by braking damping.

[0026] The guiding mechanism 4 guides the fiberglass grid to be flattened and then laid on the adhesive layer; The pressing mechanism 5 is used to roll the fiberglass grid after it is laid, so that the fiberglass grid adheres to the adhesive and the road surface. The pressing mechanism 5 can be a vibrating roller, a heated roller, or a roller with other structural forms to achieve the pressing of the fiberglass grid to the ground.

[0027] The process of laying fiberglass geogrid involves a series of steps, including applying adhesive, laying the geogrid, and rolling. The baseline tracking mechanism 6 includes a sensor for identifying the road baseline and a steering control unit for adjusting the direction of travel of the vehicle based on the sensor signal. The steering control unit controls the traveling wheels 11.

[0028] This invention uses a coating mechanism 2 to precisely apply adhesive to the road surface, ensuring uniform coverage of the adhesive material; an unwinding mechanism 3 is responsible for releasing the fiberglass grid and controlling its release tension to ensure smooth unfolding; under the action of a guiding mechanism 4, the fiberglass grid is accurately guided and flattened onto the adhesive layer, and finally rolled by a pressing mechanism 5 to firmly adhere it to the road surface, ensuring high-quality and high-strength paving results; it realizes an automated construction process, reducing manual intervention and errors, and integrates a baseline tracking mechanism 6, which identifies the road baseline through sensors and adjusts the walking direction, making the paving process more precise and adaptable to complex construction environments.

[0029] Manual installation often results in uneven grid release and misaligned tension control, leading to grid wrinkles and unevenness, which affects crack resistance and bonding quality. Especially when manually unwinding the fiberglass grid, it is difficult to simultaneously control the matching speed of the road surface adhesive application and grid release, further exacerbating the instability of construction quality. The unwinding mechanism 3 includes an unwinding shaft 31 rotatably connected to the frame 1, a shaft drive assembly that drives the unwinding shaft 31 to unwind at a uniform speed, and a tension controller that applies rotational resistance to the unwinding shaft 31. The tension controller is configured to provide damping force matching the travel speed of the coating mechanism 2. By mounting the fiberglass grid on the unwinding shaft 31 on the frame 1 and configuring the shaft drive assembly and tension controller, the shaft drive assembly ensures that the unwinding shaft 31 releases the fiberglass grid at a uniform speed, and the tension controller provides intelligent damping force by applying rotational resistance, ensuring precise matching between the unwinding tension and the travel speed of the coating mechanism 2. It solves the problem of the release speed and coating speed of fiberglass grid being out of sync, and can also effectively avoid working conditions such as wide slack, insufficient tension or excessive tightness during grid release.

[0030] During the laying of fiberglass geogrid, ensuring its precise positioning and flat unfolding on the coating layer is crucial. The guiding mechanism 4 includes at least one set of guide rollers 41, and guide plates 42 disposed on the guide rollers 41, with adjustable spacing relative to the guide rollers 41 along their axial direction. Figure 2 , Figure 5 As shown, the guide roller 41 ensures the smooth transmission of the fiberglass grid after release, and the guide plate 42 can adjust the spacing along the axial direction of the guide roller 41 to adapt to fiberglass grids of different specifications and widths. It can not only make precise adjustments according to actual needs to ensure that the fiberglass grid always maintains the correct direction and consistent tension during movement, but also effectively prevent grid offset and curling problems.

[0031] Manual coating not only makes it difficult to ensure uniform distribution of the adhesive, but also easily leads to waste or insufficient application, resulting in localized voids or weak adhesion, thus significantly affecting the reinforcing performance and function of the fiberglass geogrid. Figure 2 , Figure 6 As shown, the coating mechanism 2 includes a material storage tank 21, with multiple nozzles 22 evenly arranged on the side of the material storage tank 21 facing the road surface. The material storage tank 21 is used to store adhesive, ensuring continuous material supply during construction. Through the configuration of multiple nozzles 22, the adhesive can be evenly sprayed onto the road surface, ensuring that the thickness of the adhesive layer is consistent. This can significantly improve the adhesion between the adhesive and the road surface and the fiberglass geogrid, so that each section of geogrid laid can lay a good foundation for subsequent construction stages.

[0032] The uniformity and thickness consistency of the adhesive coating are crucial for improving overall construction quality. Manual application makes it difficult to precisely control the thickness and uniformity of the adhesive, easily leading to localized areas of excessive or insufficient thickness, which in turn affects the adhesion of the fiberglass geogrid and the overall durability of the road surface. Figure 2 , Figure 4 As shown, the coating mechanism 2 also includes a first scraper 23 and a second scraper 24 disposed at the rear end of the nozzle 22 along the traveling direction of the vehicle frame 1. The first scraper 23 and the second scraper 24 are arranged in parallel, with their sides facing the road surface, and the distance between them is adjustable. The parallel arrangement of the two scrapers, with their sides facing the road surface and the adjustable distance between them, helps to further homogenize the adhesive after spraying, ensuring a constant thickness and consistent flatness of the adhesive layer across its entire width. The first scraper 23 roughly smooths the adhesive, and the second scraper 24 further smooths it, ensuring uniform adhesion between the adhesive and the fiberglass grid.

[0033] Relying solely on nozzle 22 for initial adhesive distribution may result in localized areas of excessively thick or thin coating, which is detrimental to subsequent grid laying and adhesion. (Continue to refer to...) Figure 4 The first scraper 23 has evenly distributed toothed notches 23a on the side facing the road surface, while the second scraper 24 has a flat edge on the side facing the road surface. The evenly distributed toothed notches 23a on the edge of the first scraper 23 help to initially separate and control the adhesive layer, forming evenly spaced small grooves on the surface. These grooves effectively control the flow of the adhesive and prevent excessive accumulation during travel. The second scraper 24 has a smooth edge and is responsible for finely smoothing the initially toothed adhesive layer, ensuring a uniform and smooth coating is ultimately formed.

[0034] During the installation of fiberglass geogrid, uneven road surfaces and diverse construction environments often affect the stability and quality of adhesive application. Fixed scrapers, when dealing with road undulations, often struggle to ensure uniform adhesive thickness and may cause equipment damage or scraper wear. Figure 2 , Figure 3As shown, a buffer suspension assembly 25 is also provided between the first scraper 23 and the second scraper 24 and the frame 1. This assembly includes a guide column 25a fixedly connected to the frame 1, with a sliding member slidably connected to the guide column 25a. One end of the sliding member is fixedly connected to the first scraper 23 and the second scraper 24, and an elastic compression member 25b is provided between the sliding member and the guide column 25a. The sliding member, with one end fixedly connected to the first scraper 23 and the second scraper 24, can slide on the guide column 25a. The two scrapers automatically adjust according to the unevenness of the road surface. The elastic compression member 25b between the sliding member and the guide column 25a provides additional buffering and suspension functions. This effectively absorbs the impact and vibration caused by road surface unevenness, maintains a constant contact force between the scraper and the road surface, and ensures that the adhesive layer is uniformly coated and maintains high quality under all road conditions.

[0035] Mechanical or manual pressing methods often result in uneven force or insufficient pressure, leading to air bubbles or unevenness between the fiberglass geogrid surface and the adhesive layer, affecting its final load-bearing performance and project lifespan. For example... Figure 2 As shown, the pressing mechanism 5 includes multiple pressing roller groups 51, which can be relatively close to or far from the road surface to press the fiberglass geogrid laid on the adhesive. The pressing roller groups 51 can be precisely adjusted to the optimal force state according to the laying environment and requirements, thereby ensuring that each part of the fiberglass geogrid is fully adhered to the adhesive layer. By applying uniform and moderate pressure, each part of the geogrid can be firmly bonded to the road surface, eliminating any possible air bubbles or voids.

[0036] In some embodiments of the present invention, the surface of the pressing roller assembly 51 is provided with an elastic material layer.

[0037] According to a second aspect of the present invention, a method for intelligently laying fiberglass grids is also provided, such as... Figure 7 As shown, the steps include: S10: Install the fiberglass grid roll onto the unwinding mechanism 3, and pass the starting end of the fiberglass grid through the guide mechanism 4 and lead it to the road surface position under the pressing mechanism 5; S20: Add adhesive to coating mechanism 2 and adjust guiding mechanism 4 to adapt to the width of fiberglass grid; S30: Activate the baseline tracking mechanism 6 to align the sensor with the preset baseline on the road surface and set the travel path; S40: Drive or traction the trolley to move forward at a constant speed along the baseline. The coating mechanism 2 applies adhesive to the road surface in a quantitative manner. The unwinding mechanism 3 releases and guides the flattened fiberglass grid to lay on the adhesive layer. The pressing mechanism 5 rolls the laid fiberglass grid to make it tightly adhere to the adhesive layer and the road surface. S50: During the forward movement, the tension of the fiberglass grid in the unwinding mechanism 3 is released to match the forward speed of the trolley and keep it flat. The travel direction is adjusted in real time by the baseline tracking mechanism 6 to keep the laying straight.

[0038] This invention provides a trolley-based construction method for intelligent laying of fiberglass geogrid, ensuring efficient and high-quality laying of fiberglass geogrid in road construction. The fiberglass geogrid roll is installed on the unwinding mechanism 3, and the starting end of the geogrid is passed through the guide mechanism 4 and guided to the road surface position under the pressing mechanism 5 to ensure neat unfolding. Adhesive is added to the coating mechanism 2, and the guide mechanism 4 is adjusted to accommodate geogrids of different widths, ensuring uniform adhesive application and comprehensive geogrid laying. The baseline tracking mechanism 6 is activated, and the trolley's travel path is set by aligning with the baseline on the path using sensors to ensure precise straightness of the laying. In actual construction, the trolley moves at a constant speed along the baseline. The coating mechanism 2 applies a quantitative amount of adhesive to the road surface, the unwinding mechanism 3 releases the fiberglass geogrid, which is then flattened by the guide mechanism 4 and laid on top. Subsequently, the pressing mechanism 5 rolls the laid geogrid to ensure tight adhesion. By controlling the release tension of the unwinding mechanism 3 and the real-time adjustment of the baseline tracking mechanism 6, the speed of the geogrid and the trolley are matched to ensure a flat state. This method significantly improves paving efficiency and quality, achieves automation and precise control, reduces construction time and material waste, and enhances operational safety and project durability, providing strong technical support for the road construction industry.

[0039] Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A smart fiberglass grid laying trolley, characterized in that, include: The frame is equipped with wheels at the bottom; A coating mechanism, an unwinding mechanism, a guiding mechanism, and a pressing mechanism are arranged sequentially from front to back along the travel direction of the vehicle frame; The coating mechanism is used to apply adhesive to the road surface in a quantitative manner; The unwinding mechanism is used to carry out the release of the fiberglass grid and control the release tension of the fiberglass grid; The guiding mechanism guides the fiberglass grid to be flattened and then laid on the adhesive layer; The pressing mechanism is used to roll the fiberglass grid after it is laid, so that the fiberglass grid adheres to the adhesive and the road surface. The fiberglass geogrid laying process involves a series of steps, including applying adhesive, laying the geogrid, and rolling. The baseline tracking mechanism includes a sensor for identifying road baselines and a steering control unit for adjusting the direction of travel of the vehicle based on the sensor signals, the steering control unit controlling the travel wheels.

2. The intelligent fiberglass grid laying trolley according to claim 1, characterized in that, The unwinding mechanism includes an unwinding shaft rotatably connected to the frame, a shaft drive assembly for driving the unwinding shaft to unwind at a uniform speed, and a tension controller for applying rotational resistance to the unwinding shaft, the tension controller being configured to provide a damping force matching the travel speed of the coating mechanism.

3. The intelligent fiberglass grid laying trolley according to claim 1, characterized in that, The guiding mechanism includes at least one set of guide rollers and a guide plate disposed on the guide rollers and whose spacing is adjustable relative to the guide rollers along the axial direction.

4. The intelligent fiberglass grid laying trolley according to claim 1, characterized in that, The coating mechanism includes a storage tank, on the side of the storage tank facing the road surface, a plurality of spray nozzles are evenly arranged.

5. The intelligent fiberglass grid laying trolley according to claim 4, characterized in that, The coating mechanism further includes a first scraper and a second scraper disposed at the rear end of the nozzle along the travel direction of the vehicle frame. The first scraper and the second scraper are arranged in parallel, with their sides facing the road surface and the distance between them and the road surface is adjustable.

6. The intelligent fiberglass grid laying trolley according to claim 5, characterized in that, The first scraper has evenly distributed toothed notches on the side facing the road surface, while the second scraper has a flat edge on the side facing the road surface.

7. The intelligent fiberglass grid laying trolley according to claim 6, characterized in that, The first scraper and the second scraper are further provided with a buffer suspension assembly between them and the vehicle frame, including a guide column fixedly connected to the vehicle frame. A sliding member is slidably connected to the guide column. One end of the sliding member is fixedly connected to the first scraper and the second scraper. An elastic compression member is provided between the sliding member and the guide column.

8. The intelligent fiberglass grid laying trolley according to claim 1, characterized in that, The pressing mechanism includes multiple pressing roller groups, which can be relatively close to or far away from the road surface, and are used to press the fiberglass grid laid on the adhesive.

9. The intelligent fiberglass grid laying trolley according to claim 8, characterized in that, The surface of the pressing roller assembly is provided with an elastic material layer.

10. A method for intelligently laying fiberglass geogrid, characterized in that, The fiberglass grid intelligent laying trolley as described in any one of claims 1 to 9 includes the following steps: The fiberglass geogrid roll is installed on the unwinding mechanism, and the starting end of the fiberglass geogrid is passed through the guide mechanism and led to the road surface position under the pressing mechanism; Add adhesive to the coating mechanism and adjust the guiding mechanism to accommodate the width of the fiberglass grid; Start the baseline tracking mechanism, align the sensor with the preset baseline on the road surface, and set the walking path; The trolley is driven or pulled forward at a constant speed along the baseline. The coating mechanism applies adhesive to the road surface in a quantitative manner. The unwinding mechanism releases and guides the fiberglass grid, which is then laid flat on the adhesive layer. The pressing mechanism rolls the laid fiberglass grid to make it adhere tightly to the adhesive layer and the road surface. During the forward movement, the tension of the fiberglass grid in the unwinding mechanism is released to match the forward speed of the trolley and keep it flat. The travel direction is adjusted in real time by the baseline tracking mechanism to keep the laying straight.

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