Burying type luminous pavement nail, its installation method and intelligent pavement nail system

Abstract

The application provides a buried light-emitting pavement marker, a mounting method thereof and a smart pavement marker system, which comprise an outer shell, an inner shell, a light module, an energy module and a communication module fixed in the inner shell; the top of the outer shell and the inner shell is flush with the buried reference surface; the inner shell is a cap-shaped member with a transparent top; the material strength of the outer shell is higher than that of the inner shell; the light module comprises a circuit board and lamp beads arranged in an array, the lamp beads are at least two columns and are fixed on the upper surface of the circuit board in opposite inclinations; the center of the light-emitting surface of each column of lamp beads is arranged in an inclination relative to the bottom surface of the circuit board, so that the projection light emitted by the opposite column of lamp beads is in reverse cross irradiation; the top cover of the inner shell is filled with a first gel with light transmission between the solar panel and the lamp beads; the gap between the energy storage element, the circuit board and at least the inner shell towards the top cover is filled with a second gel, so that the energy storage element, the circuit board and part of the inner shell form an integrated sealed structure.

Description

Technical Field

[0001] This invention relates to the field of intelligent transportation technology, specifically to an underground luminous road stud, its installation method, and a smart road stud system. Background Technology

[0002] With the development of smart cities and intelligent transportation systems, in-ground luminous road studs (also known as smart road studs) are widely used as an important visual guidance facility in scenarios such as lane boundary marking, intersection warnings, and pedestrian crossing reminders. These devices are usually buried under the road surface and emit visible light through built-in light sources to guide vehicle trajectories or warn of dangerous road sections.

[0003] Existing underground lighting devices mainly include protruding and fully buried structures, with the protruding structure being more common. To ensure the light source can project over obstacles and reach distant areas, the top of the device usually needs to be a certain distance above the road surface. While this protruding structure solves the problem of illumination distance, it is highly susceptible to being scraped by heavy vehicles such as snowplows and road sweepers, and is also easily impacted or run over by high-speed motor vehicles, leading to shell cracking or internal component failure. The fully buried structure solves the pressure resistance problem, but to prevent waterproofing and dustproofing, its emitting surface usually faces upwards (towards the sky). The light is only perceived by the human eye after diffuse reflection from the road surface, resulting in a significantly shortened effective viewing distance, making it almost ineffective in rainy, foggy, or bright sunlight conditions.

[0004] Traditional installation of underground road spikes typically involves filling with dry-hardened concrete, mortar, and then epoxy resin. Before installation, workers must perform tedious leveling work in the pre-embedded pit, which is not only time-consuming and labor-intensive but also requires a high level of skill. More importantly, air can be forced into the pit during the filling process, easily creating cavities between the bottom of the equipment and the filler. These cavities can cause stress concentration under the dynamic load of vehicles over long periods, leading to cracks or subsidence of the equipment casing, and subsequently causing malfunctions such as water ingress and short circuits, increasing subsequent maintenance costs.

[0005] Therefore, we are considering providing an in-ground luminous road stud, its installation method and system to overcome the shortcomings of the existing technology. Summary of the Invention

[0006] This invention addresses the shortcomings of existing technologies by providing an in-ground luminous road stud, its installation method, and a smart road stud system. Through optimized shell structure and optical design, the road stud achieves a flush installation with the road surface, ensuring both compressive strength and good light projection distance and visibility.

[0007] The first aspect of the present invention is to provide an underground luminous road stud, comprising an outer shell, an inner shell, and a lighting module, an energy module, and a communication module disposed inside the inner shell; the underground luminous road stud is entirely underground, and the tops of the outer shell and the inner shell are flush with the underground reference surface; the outer contour of the inner shell is adapted to the inner contour of the outer shell, and the inner shell is fixed inside the outer shell;

[0008] The inner shell is a cap-shaped component that is at least transparent at the top; and the outer shell is made of metal with a higher strength than the inner shell.

[0009] The lighting module includes a circuit board and LED beads arranged in an array. The LED beads are arranged in at least two columns and are fixed to the upper surface of the circuit board at an angle to each other. The center of the light-emitting surface of each column of LED beads is inclined relative to the bottom surface of the circuit board, so that the projected light emitted by the opposing columns of LED beads is cross-irradiated in opposite directions.

[0010] The energy module includes a solar panel and an energy storage element. The solar panel converts light energy into electrical energy and stores it in the energy storage element.

[0011] The communication module is integrated on the circuit board and is used to realize remote control and status monitoring;

[0012] Moreover, the LED beads and solar panel are located on the upper surface of the circuit board, and the energy storage element is located at the lower part of the circuit board;

[0013] The space between the top cover of the inner housing and the solar panel and the lamp beads is filled with a light-transmitting first colloid; the gap between the energy storage element, the circuit board and at least the portion of the inner housing facing the top cover is filled with a second colloid, so that the energy storage element, the circuit board and part of the inner housing form an integral sealed structure.

[0014] Furthermore, the gap between the lamp beads, the solar panel, and the top cover of the inner shell is filled with a light-transmitting colloid with a refractive index close to that of the inner shell material; both the first colloid and the second colloid are two-component silicone rubber.

[0015] Furthermore, the outer shell includes an upper cover and a lower shell, which are threadedly connected, and the inner shell is sandwiched between the upper cover and the lower shell; a flange extends circumferentially from the outer peripheral wall of the inner shell, the bottom of the upper cover is supported on the upper surface of the flange; and the upper part of the lower shell is supported on the lower surface of the flange.

[0016] Preferably, the width of the flange is 1 / 3 to 1 / 2 of the width of the upper cover.

[0017] More preferably, the flange surface facing the upper cover is provided with at least one protrusion as a positioning post, the positioning post being adapted to the position and contour of the positioning groove at the bottom of the upper cover.

[0018] Furthermore, the internal structure of the bottom shell is divided into a first section, a second section, and a third section from top to bottom; the first section is located at the opening of the bottom shell, and its lateral inner contour and dimensions are adapted to the outer contour of the upper cover, for limiting and supporting the upper cover in the vertical direction; the second section is located below the first section, and its lateral inner contour corresponds to the outer contour of the flange of the inner shell; the third section is located below the second section, and its lateral inner contour is adapted to the position and contour of the side wall of the inner shell, for securely accommodating the inner shell therein.

[0019] Furthermore, the center of the light-emitting surface of the lamp bead forms an angle of 45°-55° relative to the upper surface of the circuit board.

[0020] Furthermore, the difference between the refractive index of the inner shell material and the refractive index of the light-transmitting colloid is controlled within ±0.05 to avoid light refraction at the interface between the light-transmitting colloid and the inner shell.

[0021] Optionally, the first colloid is applied between the top cover of the inner casing and the solar panel using a dot-coating method.

[0022] Preferably, the inner shell is made of polycarbonate. Other equivalent alternative materials include: high-impact modified PMMA, and PC / PMMA co-extruded composite transparent plastic.

[0023] Furthermore, the energy storage element is a lithium iron phosphate battery with a capacity of 4000mAh; the bottom shell is made of aluminum alloy and its outer side wall is provided with multiple axially extending reinforcing ribs.

[0024] Furthermore, the energy module is also equipped with an external power supply interface; the conversion circuit of the circuit board is configured to: when the external power supply voltage is detected to be stable, prioritize using the external power supply to drive the lighting module and charge the energy storage element; when the external power supply is detected to be disconnected, switch to power supply to the energy storage element.

[0025] A second aspect of the present invention is to provide a method for installing the aforementioned in-ground luminous road stud, comprising:

[0026] Step 1: Excavate the pre-embedded trench at the target installation location;

[0027] Step 2: Inject a fluid or semi-fluid filler with a density greater than the average density of the buried luminous road studs into the pre-embedded groove;

[0028] Step 3: Place the assembled in-ground luminous road studs into the pre-embedded groove filled with filler material, place a weight on the upper surface of the in-ground luminous road studs, and use the leveling properties of the filler material and the buoyancy of the road studs to make the upper surface of the road studs naturally float to the preset road surface reference height.

[0029] Step 4: Allow the filler to solidify and harden completely, so that the filler can be tightly bonded to the outer wall of the bottom shell to form an anchoring layer.

[0030] Furthermore, the bottom coverage area of ​​the weight is larger than the opening diameter of the pre-embedded groove.

[0031] A third aspect of the present invention is to provide a smart road stud system, comprising the above-mentioned buried luminous road studs and roadside units;

[0032] The buried luminous road stud is installed under the road surface; the roadside unit is set next to the lane to collect traffic status information and generate control commands; the roadside unit and the communication module of the buried luminous road stud are connected to each other to send the control commands to the buried luminous road stud and control the light color, brightness, flashing frequency and on / off status of its light module.

[0033] Furthermore, the road surface is selected from one of the following scenarios: municipal roads, highways, and parking lots.

[0034] In a preferred embodiment, the in-ground luminous road studs are installed in the merging and diverging areas of urban expressways and highways for outlining and / or alarm purposes.

[0035] In a preferred embodiment, the in-ground luminous road studs are installed under the pavement of the tidal lanes of urban roads for indicating the direction of travel.

[0036] The beneficial effects of this invention are as follows:

[0037] The road stud of this invention has a layered shell structure design consisting of a metal upper cover, a light-transmitting inner shell, and a metal bottom shell, which effectively disperses the stress of vehicle rolling and improves the pressure resistance and impact resistance; at the same time, the top of the road stud is flush with or slightly lower than the road surface, avoiding the risk of being scratched by heavy vehicles.

[0038] Furthermore, by tilting the LED beads towards each other, combined with the light-transmitting material of the inner shell and the light-transmitting colloid filling, the light can be emitted at a suitable angle and projected into the distance, thus solving the problem of short visibility of fully embedded road studs.

[0039] The installation method of the rail spikes utilizes the leveling and buoyancy principles of filler material with a density greater than that of the rail spikes for installation. It eliminates the need for manual leveling, simplifies the construction process, and improves installation efficiency. After the filler material solidifies, it is tightly bonded to the outer wall of the bottom shell to form a stable anchor, effectively preventing the rail spikes from settling and shifting, and avoiding the bottom cavity problem that is prone to occur in traditional installation methods. Attached Figure Description

[0040] Figure 1 This is a cross-sectional view of the buried luminous road stud described in Embodiment 1 of the present invention;

[0041] Figure 2 yes Figure 1 Exploded view;

[0042] Figure 3 This is a schematic diagram of the inner shell.

[0043] in,

[0044] 1: Top cover; 2: Inner shell; 3: Bottom shell; 4: Solar panel; 5: Circuit board; 6: Battery; 7: Bolt; 8: LED bead; 9: Flange; 10: Anti-slip protrusion; 11: Protrusion; 21: Top cover; 22: Side wall; 23: Positioning post. Detailed Implementation

[0045] To make the objectives, technical solutions, beneficial effects, and significant advancements of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings provided in the examples of the present invention. Obviously, all the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] In the description of this application, unless otherwise expressly specified and limited, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more; unless otherwise specified or explained, the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0047] Example 1

[0048] A smart road stud system includes an in-ground luminous road stud and a roadside unit. The in-ground luminous road stud is embedded under the road surface in the merging and diverging areas of urban expressways, serving as a curve marker for the direction of travel. The roadside unit is positioned beside the lane to collect traffic status information, vehicle movement, and decision-making information within the lane, and generates control commands based on the collected information. The roadside unit and the in-ground luminous road stud are communicatively connected via a communication module, which sends the control commands generated by the roadside unit to the control circuitry of the in-ground luminous road stud's circuit board. The control circuitry controls the light module's emission color, brightness, flashing frequency, on / off state, and the number of illuminated LEDs according to the control commands.

[0049] The roadside unit stores the road geometry parameters of the existing road segment and is configured to map the merging and diverging areas into multiple outlining regions arranged along the lane extension direction, including the entry section, the middle section of the curve, and the exit section, based on the vehicle position. The control commands generated by the roadside unit include controlling the illumination state of the road studs in the corresponding outlining regions based on the information collected by the roadside unit.

[0050] Entering a curve: The in-ground illuminated road studs in this area will flash in the first color (such as red) to alert the driver that the road ahead is entering a curve;

[0051] Middle section of the curve: Located after the entry point of the curve, the underground luminous road studs in this area are controlled to be constantly lit in a second color (such as yellow) to enhance the perception of the outline;

[0052] Exiting the curve: Located after the middle section of the curve, control the road studs in this area to return to their first color and remain constantly lit, indicating that you are leaving the curve.

[0053] like Figure 1 and Figure 2 As shown, the buried luminous road stud includes an outer shell, an inner shell 2, and a lighting module, an energy module, and a communication module disposed inside the inner shell 2. The buried luminous road stud is entirely buried, and the tops of the outer shell and inner shell 2 are flush with the underground reference surface. The outer shell includes an upper cover 1 and a bottom shell 3, which are threaded together. The outer contour of the inner shell 2 is adapted to the inner contour of the outer shell, and the inner shell 2 is sandwiched between the upper cover 1 and the bottom shell 3. The three are sequentially fastened to form a closed cavity, protecting the internal modules. The inner contours of the upper cover 1 and the bottom shell 3 are both adapted to the outer contour of the inner shell 2, and the upper cover 1 can be supported on the upper surface of the flange of the inner shell 2; the inner contour of the bottom shell 3 is adapted to the outer contour of the inner shell 2, and the lower surface of the flange of the inner shell 2 can be supported on the bottom shell 3. Furthermore, the height of the inner shell 2 is slightly less than the depth of the bottom shell 3, thus creating a gap of a certain height between the bottom of the inner shell 2 and the bottom shell 3.

[0054] like Figure 2 As shown, the upper cover 1 is annular in shape and made of aluminum alloy. Five through holes are circumferentially formed on the upper cover 1, and these through holes are arranged along the axial direction of the upper cover 1 and have internal threads for threaded connection with the bolts 7. Furthermore, the inner wall of the upper cover 1 at the locations of the through holes has a protrusion 11 extending towards its center, and the protrusion 11 smoothly transitions to the inner wall of the upper cover 1. The bottom of the upper cover 1 also includes at least one positioning groove.

[0055] The inner shell 2 is a one-piece molded, light-transmitting cap-shaped component, made entirely of polycarbonate (PC), which allows the light source of the lighting module to pass through. This invention does not limit the material of the inner shell 2, as long as it achieves visible light transmittance. 90% weather-resistant transparent engineering plastics with a notched impact strength ≥45kJ / ㎡ for simply supported beams are acceptable. Other equivalent alternatives include: high-impact modified PMMA and PC / PMMA co-extruded translucent composite plastics. For example... Figure 3 As shown, the inner housing 2 includes a top cover 21, a flange 9, and a side wall 22 from top to bottom. The side wall 22 extends vertically downward along the outer edge of the top cover 21, and the bottom outer periphery of the side wall 22 is adapted to the inner contour of the bottom housing 3. The flange 9 extends circumferentially along the outer periphery of the side wall 22 near the top cover 21, and the width of the flange 9 is 1 / 3 to 1 / 2 of the width of the upper cover 1. The upper edge of the flange contacts part of the bottom of the upper cover 1 to support the upper cover 1, and the lower edge of the flange of the inner housing 2 contacts the inner wall of the bottom housing 3, so that the bottom housing 3 supports the inner housing 2.

[0056] Furthermore, to facilitate positioning, the flange 9 has at least one protrusion on its surface facing the upper cover 1 as a positioning post 23, the positioning post 23 being adapted to the position and contour of the positioning groove at the bottom of the upper cover 1. The upper surface of the top cover 21 includes a plurality of granular anti-slip protrusions 10 arranged in an array, and the lower surface of the top cover 21 has a groove facing the upper surface, the position and contour of which correspond to the position and outer contour of the LED beads on the circuit board, serving as a receiving groove for the LED beads 8.

[0057] Furthermore, the outer contour of the top cover 21 of the inner housing 2 has a smoothly transitioned top cover recess, the contour of which corresponds to the protrusion 11 of the upper cover 1. The side wall 22 also has a smoothly transitioned side wall recess, the outer contour of which matches the inner contour of the bottom housing 3. The bottom housing 3, as the underground bearing component of the smart road stud, is made of one-piece molded aluminum alloy, possessing good structural strength and heat dissipation performance. Its internal structure is divided into a first section, a second section, and a third section from top to bottom. The first section is located at the uppermost opening of the bottom housing 3, and its lateral inner contour and dimensions match the outer contour of the upper cover 1, used to limit and support the upper cover 1 in the vertical direction, ensuring the stable connection of the upper structure of the smart road stud. The second section is located below the first section, and its lateral inner contour corresponds to the outer contour of the flange 9 of the inner housing 2. In the assembled state, the upper surface of the second partition abuts against the lower surface of the flange 9, providing support and ensuring a tight fit between the inner shell 2 and the second partition. The third partition is located below the second partition and forms the main cavity of the bottom shell 3. The transverse inner contour of the third partition is adapted to the position and contour of the side wall 22 of the inner shell 2, allowing the inner shell 2 to be stably housed within it. Furthermore, the height of the side wall 22 is slightly less than the depth of the third partition, thus maintaining a certain height gap between the bottom of the inner shell 2 and the inner bottom surface of the bottom shell 3. This gap can serve as a heat dissipation and ventilation channel or cable routing space.

[0058] Since the outer wall of the bottom shell 3 needs to be buried in the road soil, multiple reinforcing ribs extending along its axial direction are also provided on the outer wall of the bottom shell 3. This is to reduce weight without reducing strength, increase the contact area between the bottom shell 3 and the surrounding soil, effectively disperse the load transmitted from the upper part, and prevent uneven settlement of the lamp after it is buried. At the same time, the uneven surface can also play a certain role in resisting buoyancy and torsion, preventing the road spike from rotating and enhancing the anchoring force of the lamp in the soft soil layer.

[0059] During assembly, the inner contour of the upper cover 1 is tightly fitted with the outer contour of the top cover 21, and the bottom of the upper cover 1 is supported on the upper surface of the flange 9; the inner contour of the bottom housing 3 is fitted with the outer contour of the side wall 22, and the upper part of the bottom housing 3 is supported on the lower surface of the flange 9. The upper cover 1, inner housing 2, and bottom housing 3 are fixed by bolts 7 passing sequentially through the through holes of the upper cover 1 and the threaded holes of the bottom housing 3.

[0060] The inner shell 2 contains a lighting module, an energy module, and a communication module arranged downwards.

[0061] The lighting module includes a control circuit and an array of LED beads 8. The control circuit is integrated on a circuit board 5, which is a rectangular PCB board. Two rows of opposing LED beads 8 are soldered to the top surface, with each row containing 3-5 LED beads. The LED beads 8 are used to emit directional light. The energy module includes a solar panel 4 and a battery 6 to realize the conversion and storage of light energy into electrical energy.

[0062] The communication module is integrated on circuit board 5. It is electrically connected to the control circuit and interacts with external control units, including but not limited to receiving control commands from external control units and sending them to the control circuit. The control circuit and communication module circuit are arranged on the bottom surface of the circuit board.

[0063] Two rows of LED beads 8 are fixedly mounted on the circuit board 5 at an angle to each other via a bracket. The center of their light-emitting surfaces is inclined at 45° relative to the top surface of the circuit board 5 (i.e., the upper cover 1), and the positions of the LED beads are correspondingly arranged. Figure 1 The LEDs on the left project light to the upper right, while the LEDs on the right project light to the upper left, creating a reverse cross-illumination effect that expands the ground illumination range.

[0064] Furthermore, the gap between the LED bead and the top cover of the inner shell is filled with a light-transmitting colloid with a refractive index close to that of polycarbonate; the light-transmitting colloid is a highly light-transmitting two-component silicone rubber.

[0065] Furthermore, the inner shell 2 is made of PC material as the light-transmitting material and filled with light-transmitting colloid, which ensures that the light bead maintains a straight illumination before it enters the air from the top contact surface with the air. By adjusting the light-emitting angle of the light bead, a suitable refraction angle is ensured to be emitted into the distance after it enters the air.

[0066] A solar panel 4 is disposed above the circuit board 5, positioned between two rows of LED beads, and closely attached to the lower surface of the top cover 21 of the inner housing 2. The solar panel 4 is a flexible monocrystalline silicon solar panel.

[0067] The solar panel 4 is installed on the lower surface of the top cover of the inner shell 2. High light transmittance two-component silicone rubber is used as the bonding and sealing medium. By dotting or coating the high light transmittance two-component silicone rubber, it fully fills the gap between the solar panel 4 and the top cover 21 and cures to form a sealing and bonding layer.

[0068] The circuit board 5 is located inside the inner housing 2 and is completely sealed with black two-component silicone rubber. Furthermore, the circuit board 5 is not used as a partition layer; therefore, the outer contour of the circuit board is smaller than the inner diameter of the inner housing.

[0069] The battery 6 is a lithium iron phosphate battery with a capacity of 4000mAh. The battery 6 is fixed and sealed to the back of the circuit board 5 using black two-component silicone rubber. During installation, after placing the battery 6 on the back of the circuit board 5, the gaps between the battery 6 and the inner casing 2, and between the battery 6 and the circuit board 5, are filled with black two-component silicone rubber, forming an integrated sealed structure with the circuit board 5 and part of the inner casing, thus ensuring that the entire casing is completely waterproof. Furthermore, the LED beads 8 are fixed to the circuit board 5 by direct-plug soldering, forming a stable mechanical and electrical connection with the circuitry of the circuit board 5. The battery 6 and the solar panel 4 are detachably connected to the circuit board 5 via wires to obtain power. The light energy collected by the solar panel 4 is processed by the conversion circuit of the circuit board 5 and stored in the battery 6 as electrical energy.

[0070] The communication module adopts a multi-mode selectable framework, including a LoRa module and a 2.4GHz chain network structure, supporting flexible configuration of multiple wireless communication protocols to adapt to the networking requirements of different scenarios. The LoRa module enables long-distance, low-power wide-area communication, while the 2.4GHz chain network module enables short-distance, high-data-rate local area networking. The communication module communicates with an external control unit to remotely control the lighting mode (such as flashing frequency and brightness) and monitor battery level and LED chip malfunctions.

[0071] In the preparation of the buried luminous road stud, the inner shell 2 is inverted and placed in the order of solar panel 4, circuit board and battery;

[0072] Furthermore, a light-transmitting colloid is applied or coated between the top cover 21 of the inner shell 2 and the solar panel 4;

[0073] The gap between the LED and the top cover of the inner housing is filled with a light-transmitting colloid;

[0074] The circuit board 5 is completely encapsulated and sealed with black two-component silicone rubber.

[0075] The gap between the battery 6, the circuit board 5, and at least the inner shell facing the top cover is filled with black two-component silicone rubber, so that the battery 6, the circuit board 5, and part of the inner shell form an integral sealed structure; the refractive index of the light-transmitting colloid is close to that of polycarbonate, and the light-transmitting colloid is a high-transmittance two-component silicone rubber.

[0076] After the inner shell is prepared, it is placed into the bottom shell. The upper cover 1, inner shell 2, and bottom shell 3 are fixed by passing the bolts 7 through the through holes of the upper cover 1 and the threaded holes of the bottom shell 3 in sequence.

[0077] When the buried luminous road stud is in use, the solar panel 4 converts light energy into electrical energy when there is sufficient sunlight, and stores it in the battery via the circuit board 5. At night or in low light, the battery 6 powers the lighting module. Two rows of opposing LED beads 8 emit light towards each other at a fixed tilt angle. The light shines in a straight line from the top cover of the inner housing 2 to the air contact surface before entering the air, so as to achieve the warning or guidance function. The communication module uploads the operating status to the roadside unit in real time and receives instructions from the roadside unit.

[0078] This embodiment 1 achieves high reliability and low maintenance requirements for buried luminous road studs through a layered shell structure of "upper cover - inner shell - lower shell", a 45-degree tilting design of LED beads, and dual power supply of solar energy and batteries, making it particularly suitable for road safety signage scenarios.

[0079] Example 2

[0080] A smart road stud system includes an in-ground luminous road stud, a roadside unit, and a control unit; wherein the in-ground luminous road stud is buried under the road surface of a parking lot. The in-ground luminous road stud includes a housing and a lighting module, an energy module, and a communication module disposed within the housing. The structure of the in-ground luminous road stud in this embodiment is basically the same as in Embodiment 1, the only difference being the energy module within the lighting module.

[0081] The energy module has a cable outlet hole and is equipped with an IP68-rated cable locking head. The locking head has a built-in EPDM rubber sealing ring, and the axial compression force generated by tightening the nut locks the cable, meeting the stringent dustproof and waterproof requirements of buried equipment.

[0082] Furthermore, the energy module's conversion circuit switches power modes. When the external power supply voltage is detected to be stable, the system cuts off the battery power supply circuit and switches to wired direct drive, while simultaneously charging the battery. When the external power supply is detected to be disconnected, it seamlessly switches back to battery power mode, ensuring uninterrupted illumination. The lighting module uses an external power supply to solve the problem of insufficient battery life of traditional buried road studs in continuous rainy weather or high-power scenarios. This allows the road studs to be deployed on highways without mains power access, or integrated into smart street lighting systems or parking guidance systems in cities with mains power supply, significantly improving the product's adaptability to different scenarios.

[0083] Example 3

[0084] This embodiment provides a method for installing the buried luminous road stud as described in Embodiment 1. The buried luminous road stud utilizes buoyancy for installation, and the specific installation steps are as follows:

[0085] Step 1: Excavate a pre-embedded groove at the target installation location. The depth and diameter of the pre-embedded groove are both greater than the height of the bottom shell 3 to ensure that there is enough space for the subsequent insertion of the light-emitting road stud and the flow of the filling material.

[0086] Step Two: Select a fluid or semi-fluid filler with a density greater than the average density and inject it into the pre-embedded groove. The filler is a commonly used inorganic rapid repair material in construction, such as fast-hardening cement mortar or high-strength non-shrink grout. The filling amount is determined according to the construction site. Moreover, in this step, there is no need to manually level the bottom of the groove; the self-leveling property of the filler itself can achieve subsequent self-adaptive leveling.

[0087] Step 3: Place the assembled in-ground luminous road studs into the pre-embedded groove filled with filler material. Since the overall density of the in-ground luminous road studs is less than the density of the selected filler material, according to Archimedes' principle, the in-ground luminous road studs will experience an upward buoyancy force in the liquid filler material. At this time, the in-ground luminous road studs will naturally float upwards under the action of buoyancy until the upper surface of the inner shell 2 reaches the preset road surface reference height.

[0088] Furthermore, a weight is placed on the upper surface of the buried luminous stud, with the bottom area of ​​the weight covering a diameter larger than the opening diameter of the pre-embedded groove. The weight's gravity prevents the buried luminous stud from floating or shifting before the filler solidifies, and forces excess filler that overflows during the placement of the stud to flow out of the groove through the gap between the outer wall of the stud and the inner wall of the groove. Once the buried luminous stud is in position and shows no further displacement, any remaining filler overflowing around the groove opening is cleaned.

[0089] Step 4: Allow the filler to fully solidify and harden. During this period, the filler will bond tightly to the outer wall of the bottom shell 3, forming a stable anchoring layer. Once the filler has reached the predetermined strength, remove the top weight to complete the underground installation of the in-ground luminous road stud.

[0090] Currently, when maintenance is required, the method for removing buried equipment involves drilling another hole next to the existing maintenance pre-embedded trench to remove the complete equipment. Unlike existing technologies, the buried luminous road stud of this invention only requires removing the bolts to easily remove the upper cover 1 and inner shell 2, while the bottom shell 3 does not need to be removed, facilitating routine maintenance.

[0091] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A type of buried luminous road stud, characterized in that... It includes an outer shell, an inner shell (2), and a lighting module, an energy module, and a communication module fixedly installed inside the inner shell (2); the buried luminous road stud is buried in the ground, and the top of the outer shell and the inner shell (2) are flush with the buried reference surface; the outer contour of the inner shell (2) is adapted to the inner contour of the outer shell, and the inner shell (2) is fixed inside the outer shell; The inner shell (2) is a cap-shaped component with at least a transparent top; and the outer shell is made of metal with a higher strength than the inner shell. The lighting module includes a circuit board (5) and an array of LED beads (8). The LED beads (8) are arranged in at least two columns and are fixed to the upper surface of the circuit board (5) at an angle to each other. The center of the light-emitting surface of each column of LED beads (8) is inclined relative to the bottom surface of the circuit board (5) so that the projected light emitted by the opposite columns of LED beads is cross-irradiated in opposite directions. The energy module includes a solar panel (4) and an energy storage element, wherein the solar panel (4) converts light energy into electrical energy and stores it in the energy storage element; The communication module is integrated on the circuit board (5) and is used to realize remote control and status monitoring; Moreover, the lamp beads (8) and solar panels (4) are located on the upper surface of the circuit board (5), and the energy storage element is located at the lower part of the circuit board (5); The top cover (21) of the inner housing (2) is filled with a light-transmitting first colloid between the solar panel and the lamp beads; the gap between the energy storage element, the circuit board (5) and at least the inner housing facing the top cover is filled with a second colloid, so that the energy storage element, the circuit board (5) and the inner housing (2) form an integrated sealed structure. Furthermore, the gap between the lamp bead (8), the solar panel (4) and the top cover (21) of the inner shell (2) is filled with a light-transmitting colloid with a refractive index close to that of the inner shell material; both the first colloid and the second colloid are two-component silicone rubber.

2. The buried luminous road stud according to claim 1, characterized in that, The outer shell includes an upper cover (1) and a bottom shell (3) which are threaded together, and the inner shell (2) is sandwiched between the upper cover (1) and the bottom shell (3); a flange (9) is formed by extending circumferentially on the outer peripheral wall of the inner shell (2), the bottom of the upper cover (1) is supported on the upper surface of the flange (9); the upper part of the bottom shell (3) is supported on the lower surface of the flange (9).

3. The buried luminous road stud according to claim 2, characterized in that, The internal structure of the bottom shell (3) is divided into a first section, a second section and a third section from top to bottom; the first section is located at the opening of the bottom shell (3), and its lateral inner contour and size are adapted to the outer contour of the upper cover (1), which is used to limit and support the upper cover (1) in the vertical direction; the second section is located below the first section, and its lateral inner contour corresponds to the outer contour of the flange (9) of the inner shell (2); the third section is located below the second section, and its lateral inner contour is adapted to the position and contour of the side wall (22) of the inner shell (2), which is used to stably accommodate the inner shell (2).

4. The buried luminous road stud according to claim 1, characterized in that, The center of the light-emitting surface of the lamp bead (8) is at an angle of 45°-55° relative to the upper surface of the circuit board (5).

5. The buried luminous road stud according to claim 1, characterized in that, The difference between the refractive index of the inner shell (2) and the refractive index of the first colloid is controlled within ±0.

05.

6. The buried luminous road stud according to claim 2, characterized in that, The inner shell is made of polycarbonate, the upper cover (1) and the bottom shell (3) are made of aluminum alloy, and the outer side wall of the bottom shell (3) is provided with multiple axially extending reinforcing ribs.

7. The buried luminous road stud according to claim 1, characterized in that, The energy module is also equipped with an external power supply interface; the conversion circuit of the circuit board (5) is configured to: when the external power supply voltage is detected to be stable, prioritize using the external power supply to drive the lighting module and charge the energy storage element; when the external power supply is detected to be disconnected, switch to power supply to the energy storage element.

8. A method for installing an in-ground luminous road stud, used for installing the in-ground luminous road stud as described in any one of claims 1 to 7, characterized in that, include: Step 1: Excavate the pre-embedded trench at the target installation location; Step 2: Inject a fluid or semi-fluid filler with a density greater than the average density of the buried luminous road studs into the pre-embedded groove; Step 3: Place the assembled in-ground luminous road studs into the pre-embedded groove filled with filler material, place a weight on the upper surface of the in-ground luminous road studs, and use the leveling properties of the filler material and the buoyancy of the road studs to make the upper surface of the road studs naturally float to the preset road surface reference height. Step 4: Let the filler solidify and harden completely, allowing it to bond tightly to the outer wall of the outer shell to form an anchoring layer.

9. The installation method according to claim 8, characterized in that, The bottom coverage area of ​​the weight is greater than the opening diameter of the pre-embedded groove.

10. A smart road stud system, characterized in that... Includes the in-ground luminous road studs and roadside units as described in any one of claims 1 to 7; The buried luminous road stud is installed under the road surface; the roadside unit is set next to the lane to collect traffic status information and generate control commands; the roadside unit and the communication module of the buried luminous road stud are connected to each other to send the control commands to the buried luminous road stud and control the light color, brightness, flashing frequency and on / off status of its light module.

Images