Road lighting system and guardrail lamp thereof

Abstract

The invention discloses a road lighting system and a guardrail lamp thereof, the guardrail lamp is mounted on any side of a target road in the transverse direction, the vehicle driving direction of the target road is taken as the longitudinal direction, and the direction perpendicular to the vehicle driving direction of the target road is taken as the transverse direction; the guardrail lamp comprises at least one directional illumination module, and the directional illumination module comprises a plurality of directional illumination modules with different projection angles, so that each directional illumination module is controlled by the corresponding projection angle to directionally irradiate a sideline of a target road or directionally irradiate a lane separation line of the target road. According to the technical scheme, it can be ensured that a driver can well distinguish the lane and the road side boundary even in the low-visibility rain and fog weather, surrounding vehicles can be easily and clearly seen, and then the driving safety in the rain and fog weather is greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of road lighting, and particularly to a road lighting system and its guardrail lights. Background Art

[0002] In rainy and foggy weather with low visibility, for the lamps of existing road lighting systems, the light emitted by them will be lost after passing through the fog. After the lost light propagates to the road surface, due to the reflection loss of the road surface and the usually higher fog concentration near the ground, the reflected light of the road surface will also have a large loss, making it difficult for drivers to clearly see the road surface, and it is also difficult for the reflected light of the road surface to illuminate the vehicle in front, which easily causes traffic accidents such as rear-end collisions and side collisions. Summary of the Invention

[0003] The embodiments of the present application provide a road lighting system and its guardrail lights, aiming to improve the technical problem that for the lamps of existing road lighting systems, the light emitted by them will have a large loss in rainy and foggy weather with low visibility, resulting in drivers having difficulty seeing the road surface and the vehicle in front clearly, and easily causing traffic accidents such as rear-end collisions and side collisions.

[0004] To this end, the embodiments of the present application provide a guardrail light, which is applied to a road lighting system. The road lighting system is used for lighting a target road. The guardrail light is installed on any side of the target road in the transverse direction. The guardrail light includes at least one directional lighting module, and the directional lighting module includes a number of directional lighting modules with different projection angles, so that each directional lighting module, under the control of the corresponding projection angle, either directionally irradiates the edge line of the target road or directionally irradiates the lane separation line of the target road.

[0005] Optionally, in some embodiments of the present application, each guardrail light is disposed opposite to at least one lane separation line in the transverse direction.

[0006] Optionally, in some embodiments of the present application, all the lane separation lines opposite to the current guardrail light are used as the first separation lines, and the part of the edge line opposite to the first separation lines in the transverse direction is used as the first edge line;

[0007] At least one of the directional lighting modules includes a forward lighting module, and the forward lighting module includes a number of forward directional lighting modules with different projection angles, so that each forward directional lighting module, under the control of the corresponding projection angle, either directionally irradiates the first edge line or directionally irradiates one of the first separation lines.

[0008] Optionally, in some embodiments of the present application, all the lane dividing lines adjacent to the first dividing line and located behind the first dividing line in the longitudinal direction are used as the second dividing line. At least one of the directional lighting modules further includes a reverse lighting module, and the reverse lighting module includes a plurality of reverse directional lighting modules with different projection angles, such that each reverse directional lighting module is controlled to directionally irradiate one of the second dividing lines at a corresponding projection angle.

[0009] Optionally, in some embodiments of the present application, all the lane dividing lines adjacent to the first dividing line and located in front of the first dividing line in the longitudinal direction are used as the third dividing line. At least one of the directional lighting modules further includes a forward lighting module, and the forward lighting module includes a plurality of forward directional lighting modules with different projection angles, such that each forward directional lighting module is controlled to directionally irradiate one of the third dividing lines at a corresponding projection angle.

[0010] Optionally, in some embodiments of the present application, the lateral projection angle θ1 of the forward directional lighting module that directionally irradiates the first side line is:

[0011]

[0012] The lateral projection angle θ2 of the forward directional lighting module that directionally irradiates the first dividing line is:

[0013]

[0014] w n = d + w1 + n·w0 + (n - 0.5)·w2

[0015] where h is the installation height of the corresponding forward directional lighting module, d is the distance between the current guardrail lamp and the first side line, w1 is the width of the first side line, w0 is the lane width of the target road, w2 is the width of the first dividing line, and all the first dividing lines are numbered starting from 1 in the order from near to far from the current guardrail lamp in the preset direction, and n is the order number corresponding to the first dividing line that is directionally irradiated.

[0016] Optionally, in some embodiments of the present application, the maximum lateral projection opening angle α1 of the forward directional lighting module that directionally irradiates the first side line is:

[0017]

[0018] The maximum lateral projection opening angle α2 of the forward directional lighting module that directionally irradiates the first dividing line is:

[0019]

[0020] Wherein, h is the installation height of the corresponding forward-directional lighting module, d is the lateral distance between the current guardrail lamp and the sideline, w1 is the width of the sideline, w0 is the lane width of the target road, w2 is the width of the first dividing line, and all the first dividing lines are numbered starting from 1 in the order from near to far from the current guardrail lamp in the preset direction, and n is the number corresponding to the first dividing line for directional illumination.

[0021] Optionally, in some embodiments of the present application, the directional lighting module is a red light lighting module or a yellow light lighting module.

[0022] In addition, an embodiment of the present application further provides a road lighting system, including a plurality of the above-mentioned guardrail lamps, and the plurality of guardrail lamps are respectively regularly distributed on either side or both sides of the target road in the transverse direction.

[0023] Optionally, in some embodiments of the present application, at least one guardrail lamp is correspondingly arranged in the transverse direction for each lane dividing line;

[0024] The minimum longitudinal light distribution opening angle β0 of each directional lighting module for directionally illuminating the sideline of the target road is:

[0025]

[0026] Wherein, L0 is the longitudinal length of the guardrail lamp, d0 is the distance between two adjacent guardrail lamps, d is the lateral distance between the current guardrail lamp and the sideline, and w1 is the width of the sideline.

[0027] With the technical solution provided by the present application, through the above structural settings, the directional lighting module of the guardrail lamp of the present application includes a number of directional lighting modules with different projection angles, so that each directional lighting module, under the control of the corresponding projection angle, either directionally illuminates the sideline of the target road or directionally illuminates the lane dividing line of the target road. Since the sidelines and lane dividing lines of the target road are usually white and have a higher reflectivity than the road surface such as asphalt or cement, more reflected light can be generated to illuminate the surrounding environment and vehicles, enabling the driver to clearly distinguish the lanes and road sidelines even in rainy and foggy weather with low visibility, and also being able to easily see the surrounding vehicles, thereby greatly improving driving safety in rainy and foggy weather. It can be seen that this technical solution can effectively improve the technical problem of the existing road lighting system's lamps, where the light emitted has a large loss in rainy and foggy weather with low visibility, resulting in the driver's difficulty in seeing the road surface and the vehicle in front, and easily causing traffic accidents such as rear-end collisions and side collisions. Description of the Drawings

[0028] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0029] Figure 1 It is a schematic cross-sectional illumination diagram of the road lighting system in the target road in the embodiment of the present application;

[0030] Figure 2 It is a schematic longitudinal illumination diagram of the road lighting system in the target road in the embodiment of the present application;

[0031] Figure 3 It is a schematic parameter diagram of the lateral projection of the road lighting system in the target road in the embodiment of the present application;

[0032] Figure 4 It is a schematic parameter diagram of the longitudinal projection of the road lighting system in the target road in the embodiment of the present application;

[0033] Figure 5 It is a schematic diagram of the light projection angle controlled by the TIR lens for the lateral direction of the road in the embodiment of the present application;

[0034] Figure 6 It is a schematic diagram of the light projection angle controlled by the TIR lens for the longitudinal direction of the road in the embodiment of the present application.

[0035] 10. Road lighting system; 11. Guardrail lamp; 12. Directional lighting module;

[0036] 20. Target road; 21. Side line; 22. Lane separation line; 221. First separation line; 222. Second separation line; 223. Third separation line; 30. TIR lens. Detailed implementation manners

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0038] It should be noted that all the directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the attached drawings). If this specific posture changes, the directional indications will also change accordingly.

[0039] In addition, the descriptions involving "first", "second", etc. in the present application are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions conflicts with each other or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0040] In one embodiment, as Figures 1 to 4 shown, the embodiment of the present application provides a guardrail lamp 11, which is mainly installed on either side of the target road 20 in the transverse direction. Taking the vehicle driving direction of the target road 20 as the longitudinal direction, the direction perpendicular to the vehicle driving direction of the target road 20 is the transverse direction. The guardrail lamp 11 includes at least one directional lighting module 12, and the directional lighting module 12 includes several directional lighting modules (not shown) with different projection angles, so that each directional lighting module, under the control of the corresponding projection angle, either directionally irradiates the side line 21 of the target road or directionally irradiates the lane separation line 22 of the target road.

[0041] It can be understood that the guardrail lamp 11 in the embodiment of the present application is mainly applied to the road lighting system 10, and the road lighting system 10 is generally used for lighting the target road 20, and the target road 20 can specifically be a one-way road such as a highway. The above-mentioned guardrail lamp 11 being mainly installed on either side of the target road 20 in the transverse direction specifically means that the guardrail lamp 11 is located on the left or right outside the target road 20 as Figure 1 shown, and when the guardrail lamp 11 is as Figure 1When it is shown to be on the left side outside the target road 20, each directional lighting module 12 projects towards the right side. Similarly, when the guardrail lamp 11 is on the right side outside the target road 20, each directional lighting module 12 projects towards the left side. Each of the above-mentioned directional lighting modules, under the control of the corresponding projection angle, either directionally illuminates the side line 21 of the target road or the lane separation line 22 of the target road. Specifically, each directional lighting module under the same directional lighting module 12 has a different projection angle, and each different projection angle can either cause the corresponding directional lighting module to directionally illuminate the side line 21 of the target road or cause the corresponding directional lighting module to directionally illuminate the lane separation line 22 of the target road.

[0042] Generally speaking, different directional lighting modules can specifically have different projection angles by configuring lenses with different structures. To further improve the lighting brightness of the guardrail lamp 11 for the target road 20, the guardrail lamp 11 can specifically adopt the structure of a low-position guardrail lamp to reduce the distance from each of its directional lighting modules to the corresponding position on the road surface when emitting light, thereby reducing the loss during the propagation process and improving the lighting brightness of the guardrail lamp 11 for the target road 20.

[0043] In this way, for the guardrail lamp 11 in the embodiment of the present application, through the above structural arrangement, its directional lighting module 12 can include several directional lighting modules with different projection angles, so that each directional lighting module, under the control of the corresponding projection angle, either directionally illuminates the side line 21 of the target road 20 or the lane separation line 22 of the target road 20. Since the side line 21 and the lane separation line 22 of the target road 20 are usually white and have a higher reflectivity than the road surface such as asphalt or cement, more reflected light can be generated to illuminate the surrounding environment and vehicles, enabling the driver to clearly distinguish the lanes and the road side lines even in rainy and foggy weather with low visibility, and also being able to easily see the surrounding vehicles, thereby greatly improving the driving safety in rainy and foggy weather.

[0044] In some examples, such as Figure 1 and Figure 2As shown, each guardrail lamp 11 is arranged opposite to at least one lane dividing line 22 in the horizontal direction. In this way, through the above structural arrangement, it is convenient for each guardrail lamp 11 to perform corresponding directional projection on all the lane dividing lines 22 opposite to it in the horizontal direction, so as to ensure that all the lane dividing lines 22 are subjected to more uniform directional projection by the corresponding directional lighting module. Further, all the lane dividing lines opposite to the current guardrail lamp 11 are taken as the first dividing lines 221, and the part of the side line 21 opposite to the first dividing lines 221 in the horizontal direction is taken as the first side line. At least one directional lighting module includes a forward lighting module (not shown), and the forward lighting module includes a number of forward directional lighting modules with different projection angles, so that each forward directional lighting module, under the control of the corresponding projection angle, either directionally irradiates the first side line (not shown in the figure) or directionally irradiates a first dividing line 221. In this way, through the above structural arrangement, the current guardrail lamp can directionally irradiate its corresponding first side line and all its corresponding first dividing lines respectively through the forward lighting module.

[0045] It can be understood that the specific meaning of each guardrail lamp 11 being arranged opposite to at least one lane dividing line 22 in the horizontal direction in this example is that the connection line between the center of each guardrail lamp 11 and the center of the lane dividing line 22 opposite to it is a straight line extending in the horizontal direction. The specific meaning of taking the part of the side line 21 opposite to the first dividing lines 221 in the horizontal direction as the first side line in this example is that the length of the first side line in the vertical direction is the same as that of the first dividing lines 221, and the connection line between the center of the first side line and the center of the corresponding first dividing lines 221 is a straight line extending in the horizontal direction.

[0046] In some examples, such as Figure 1 and Figure 2As shown, all lane dividers 22 adjacent to the first divider line 221 and longitudinally located behind the first divider line are used as the second divider line 222. At least one directional lighting module further includes a reverse lighting module (not shown). The reverse lighting module includes a number of reverse directional lighting modules with different projection angles, such that each reverse directional lighting module is controlled to directionally illuminate a second divider line 222 at a corresponding projection angle. Thus, through the above structural arrangement, through the combined lighting between the reverse lighting module and the forward lighting module, when a vehicle blocks the lighting of a certain guardrail light 11 on the lane divider 22, the guardrail lights at adjacent positions can also illuminate the lane divider 22, thereby improving the lighting reliability. On the other hand, multi-directional lighting can increase the lighting range of the reflected light of the white line, making the environment and vehicles around the white line easier to be illuminated, and further enhancing the driving safety in rainy and foggy weather. Further, all lane dividers 22 adjacent to the first divider line 221 and longitudinally located in front of the first divider line 221 are used as the third divider line 223. At least one directional lighting module further includes a forward lighting module (not shown). The forward lighting module includes a number of forward directional lighting modules with different projection angles, and under the control of the corresponding projection angles, each forward directional lighting module is made to directionally illuminate a third divider line 223. Thus, through the above structural arrangement, through the combined lighting between the forward lighting module and the forward lighting module, when a vehicle blocks the lighting of a certain guardrail light 11 on the lane divider 22, the guardrail lights at adjacent positions can also illuminate the lane divider 22, thereby improving the lighting reliability. On the other hand, multi-directional lighting can increase the lighting range of the reflected light of the white line, making the environment and vehicles around the white line easier to be illuminated, and further enhancing the driving safety in rainy and foggy weather. Preferably, through the combined lighting between the reverse lighting module, the forward lighting module and the forward lighting module, when a vehicle blocks the lighting of a certain guardrail light 11 on the lane divider 22, the guardrail lights at adjacent positions can also illuminate the lane divider 22, thereby improving the lighting reliability. On the other hand, multi-directional lighting can increase the lighting range of the reflected light of the white line, making the environment and vehicles around the white line easier to be illuminated, and further enhancing the driving safety in rainy and foggy weather.

[0047] It can be understood that the directional lighting of the road edge line is generally not blocked by vehicles during driving. Therefore, it is generally not necessary to set corresponding reverse lighting modules and forward lighting modules to perform directional lighting on adjacent parts of the road edge line. However, in order to further improve driving safety in rainy and foggy weather and avoid the directional lighting of the road edge line being blocked by unknown objects under special circumstances, the part of the edge line 21 that is directly opposite to the second dividing line 222 in the horizontal direction can also be used as the second edge line (not shown in the figure). At least one reverse directional lighting module is controlled at a corresponding projection angle to directionally irradiate the second edge line. And the part of the edge line 21 that is directly opposite to the third dividing line 223 in the horizontal direction is used as the third edge line (not shown in the figure). At least one forward directional lighting module is controlled at a corresponding projection angle to directionally irradiate the third edge line.

[0048] In some examples, such as Figure 3 shown, the horizontal projection angle θ1 of the forward directional lighting module that directionally irradiates the first edge line is:

[0049]

[0050] The horizontal projection angle θ2 of the forward directional lighting module that directionally irradiates the first dividing line 221 is:

[0051]

[0052] w n = d + w1 + n·w0 + (n - 0.5)·w2

[0053] where h is the installation height of the corresponding forward directional lighting module, d is the distance between the current guardrail lamp 11 and the first edge line, w1 is the width of the first edge line, w0 is the lane width of the target road 20, w2 is the width of the first dividing line 221, and all the first dividing lines are numbered starting from 1 in the order from near to far from the current guardrail lamp 11 in the preset direction, and n is the order corresponding to the first dividing line 221 that is directionally irradiated.

[0054] In this way, through the above structural settings, it can ensure that the corresponding forward directional lighting module can accurately irradiate the middle position of the first edge line in the horizontal direction by controlling the horizontal projection angle of the forward directional lighting module that directionally irradiates the first edge line to be θ1, so as to ensure that the entire directional lighting is more uniform. And it can ensure that the corresponding forward directional lighting module can accurately irradiate the middle position of the first dividing line 221 in the horizontal direction by controlling the horizontal projection angle of the forward directional lighting module that directionally irradiates the first dividing line 221 to be θ2, so as to ensure that the entire directional lighting is more uniform.

[0055] In some examples, such as Figure 3As shown, the maximum lateral projection angle α1 of the forward directional lighting module that directionally irradiates the first side line is:

[0056]

[0057] The maximum lateral projection angle α2 of the forward directional lighting module that directionally irradiates the first dividing line is:

[0058]

[0059] Wherein, h is the installation height of the corresponding forward directional lighting module, d is the lateral distance between the current guardrail lamp 11 and the side line 21, w1 is the width of the side line 21, w0 is the lane width of the target road 20, w2 is the width of the first dividing line 221, and all the first dividing lines 221 are sequentially numbered from 1 according to the preset direction from near to far from the current guardrail lamp 11, and n is the order corresponding to the first dividing line 221 irradiated directionally.

[0060] Thus, through the above structural settings, it can ensure that the lateral projection range of the forward directional lighting module that directionally irradiates the first side line can cover the entire first side line by controlling the lateral projection angle of the forward directional lighting module that directionally irradiates the first side line to be α1. And it can ensure that the lateral projection range of the forward directional lighting module that directionally irradiates the first dividing line 221 can cover the entire first dividing line 221 by controlling the lateral projection angle of the forward directional lighting module that directionally irradiates the first dividing line 221 to be α2.

[0061] In some examples, as Figure 3 shown, the directional lighting module is a red light lighting module or a yellow light lighting module. Thus, through the above structural settings, the characteristics that the fog penetration ability of red light and yellow light is stronger than that of white light can be utilized to further improve the lighting effect of the guardrail lamp 11 in rainy and foggy weather with low visibility.

[0062] In one embodiment, as Figures 1 to 4 The embodiment of the present application further provides a road lighting system 10, and the road lighting system 10 includes a plurality of the above-mentioned guardrail lamps 11, and the plurality of guardrail lamps 11 are respectively regularly distributed on either side or both sides of the target road 20 in the lateral direction.

[0063] It can be understood that the specific setting that the plurality of guardrail lamps 11 mentioned in this embodiment are respectively regularly distributed on one side or both sides of the target road 20 means that the plurality of guardrail lamps 11 can be, as Figure 2 shown, equally spaced on both sides of the target road 20 in the lateral direction, or equally spaced on either side of the target road 20 in the lateral direction, or staggered on both sides of the target road 20 in the lateral direction. Preferably, Figure 2A plurality of guardrail lights 11 as shown are evenly distributed on both sides in the transverse direction of the target road 20. At this time, when each guardrail light 11 is directed to illuminate the side line 21 of the target road, it can only be directed to illuminate the side line 21 on the same side of the target road 20 as its position, while the side line 21 on the side of the target road 20 different from its position is directed to be illuminated by another guardrail light 11 on the corresponding side.

[0064] In this way, in the road lighting system 10 of the embodiment of the present application, through the above structural arrangement, the directional lighting module 12 of the guardrail light 11 includes a number of directional lighting modules with different projection angles, so that each directional lighting module is controlled at the corresponding projection angle to either directionally illuminate the side line 21 of the target road 20 or directionally illuminate the lane separation line 22 of the target road 20. Since the side line 21 and the lane separation line 22 of the target road 20 are usually white and have a higher reflectivity than the road surface such as asphalt or cement, more reflected light can be generated to illuminate the surrounding environment and vehicles, so that the driver can clearly distinguish the lanes and the road side lines even in rainy and foggy weather with low visibility, and can also easily see the surrounding vehicles, thus greatly improving the driving safety in rainy and foggy weather.

[0065] In some examples, as Figure 4 shown, at least one guardrail light 11 is correspondingly arranged in the transverse direction for each lane separation line 22. In this way, through the above structural arrangement, it can be ensured that at least one guardrail light 11 can correspondingly perform directional lighting on each lane separation line 22. Further, the minimum longitudinal light distribution opening angle β0 of each directional lighting module that directionally illuminates the side line 21 of the target road 20 is:

[0066]

[0067] where L0 is the longitudinal length of the guardrail light, d0 is the distance between two adjacent guardrail lights, d is the lateral distance between the current guardrail light and the side line, and w1 is the width of the side line. In this way, through the above structural arrangement, continuous and uniform lighting of the road side line can be realized to achieve the directional lighting effect.

[0068] It can be understood that since the spacing of the guardrail lights 11 is usually not equal to the distance of the lane dividing lines 22, the relative position of the guardrail lights 11 and the white lines changes. That is, it is impossible to make the light completely project onto the lane dividing lines 22 through a fixed longitudinal beam angle. The longitudinal angle can be set to be adjustable on the three directional lighting modules of the lamp, so as to adjust the longitudinal projection deflection angle γ according to the actual situation during on-site installation. The projection center of the forward lighting module should point to the center of the lane dividing line 22 that is closest to the lamp longitudinally. The centers of the adjacent lane dividing lines 22 in the driving direction and the reverse driving direction are respectively the projection centers of the forward lighting module and the reverse lighting module. In the longitudinal direction of the road, in order to make the light of the forward lighting module fully irradiate on the first dividing line 221, the maximum longitudinal beam angle is when the lamp center is directly opposite to the center of two adjacent lane dividing lines 22, such as Figure 4 the position where the guardrail light 11 is located in the middle guardrail lamp, and at this time the longitudinal projection beam angle is where L is the length of the lane dividing line 22, s is the spacing between the lane dividing lines 22, and the longitudinal beam angle of the forward lighting module should be less than β1; the projection beam angles of the forward lighting module and the reverse lighting module should be less than

[0069] In some examples, such as Figure 5 shown, in the transverse direction of the road, each directional lighting module uses the characteristic of the TIR lens 30 to collimate the light beam to reduce the projection opening angle of the directional lighting module, so as to concentrate the light on the corresponding white line (i.e., the side line 21 or the lane dividing line 22). The specific principle is as follows: The light rays emitted by the light source of the directional lighting module at different angles are refracted by the upper wall of the TIR lens 30 and totally reflected by the side wall, and are emitted in a direction close to perpendicular to the light-emitting surface, thereby forming a smaller projection opening angle.

[0070] In some examples, such as Figure 6 shown, in the longitudinal direction of the road, the light rays of the light source of each directional lighting module are close to perpendicular emission after being refracted by the upper wall of the TIR lens 30, and the collimated light rays incident on the light-emitting surface after being totally reflected by the side wall are curved surfaces. Therefore, by controlling the curvature of this curved surface, the collimated light rays can be refracted into the required light-emitting angles, thereby controlling the projection opening angle.

[0071] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: They can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A guardrail lamp, used in a road lighting system, wherein the road lighting system is used for lighting a target road, characterized in that: The guardrail lamp is installed on either side of the target road in the transverse direction, with the vehicle driving direction of the target road as the longitudinal direction and the direction perpendicular to the vehicle driving direction of the target road as the transverse direction; The guardrail lamp includes at least one directional lighting module, which includes a plurality of directional lighting modules with different projection angles, so that each of the directional lighting modules, under the control of the corresponding projection angle, either directionally illuminates the edge line of the target road or directionally illuminates the lane separator line of the target road.

2. The guardrail lamp according to claim 1, characterized in that: Each of the guardrail lights is arranged opposite to at least one lane dividing line in the transverse direction.

3. The guardrail lamp according to claim 2, characterized in that: All the lane dividing lines directly facing the current guardrail light are taken as first dividing lines, and the part of the sideline directly facing the first dividing line in the horizontal direction is taken as the first sideline; At least one of the directional lighting modules includes a forward lighting module, and the forward lighting module includes a plurality of forward directional lighting modules with different projection angles, so that each of the forward directional lighting modules, under the control of the corresponding projection angle, either directionally illuminates the first edge line or directionally illuminates the first dividing line.

4. The guardrail lamp according to claim 3, characterized in that: All the lane dividing lines adjacent to the first dividing line and located behind the first dividing line in the longitudinal direction are used as second dividing lines. At least one of the directional lighting modules also includes a reverse lighting module, and the reverse lighting module includes a plurality of reverse directional lighting modules with different projection angles, so that each of the reverse directional lighting modules directionally illuminates one of the second dividing lines under the control of the corresponding projection angle.

5. The guardrail lamp according to claim 3, characterized in that: All the lane dividing lines adjacent to the first dividing line and located in front of the first dividing line in the longitudinal direction are used as third dividing lines. At least one of the directional lighting modules also includes a forward lighting module, and the forward lighting module includes a plurality of forward directional lighting modules with different projection angles, so that each of the forward directional lighting modules directionally illuminates one of the third dividing lines under the control of the corresponding projection angle.

6. The guardrail lamp according to claim 3, characterized in that: The lateral projection angle θ1 of the forward directional lighting module for directional illumination of the first edge is: The lateral projection angle θ2 of the forward directional lighting module that directional illuminates the first dividing line is: w n =d+w1+n·w0+(n-0.5)·w2 Among them, h is the installation height of the corresponding forward directional lighting module, d is the distance between the current guardrail light and the first side line, w1 is the width of the first side line, w0 is the lane width of the target road, w2 is the width of the first dividing line, and all the first dividing lines are numbered sequentially starting from 1 according to the distance from the current guardrail light in the preset direction from near to far, and n is the number corresponding to the first dividing line of the corresponding directional illumination.

7. The guardrail lamp according to claim 3, characterized in that: The maximum lateral projection angle α1 of the forward directional lighting module for directional irradiation of the first edge line is: The maximum lateral projection angle α2 of the forward directional lighting module for directional illumination of the first dividing line is: Among them, h is the installation height of the corresponding forward directional lighting module, d is the lateral distance between the current guardrail light and the edge line, w1 is the width of the edge line, w0 is the lane width of the target road, w2 is the width of the first dividing line, and all the first dividing lines are sequenced from 1 to far according to the distance from the current guardrail light in the preset direction, and n is the corresponding order of the first dividing lines of the corresponding directional illumination.

8. The guardrail lamp according to any one of claims 1 to 7, characterized in that: The directional lighting module is a red light lighting module or a yellow light lighting module.

9. A road lighting system, characterized in that: It comprises a plurality of guardrail lights as described in any one of claims 1 to 7, and the plurality of guardrail lights are regularly distributed on any side of the target road in the lateral direction or on both sides of the target road in the lateral direction.

10. The road lighting system according to claim 9, characterized in that: Each lane dividing line is provided with at least one guardrail light in the horizontal direction; The minimum longitudinal light distribution angle β0 of each directional lighting module that directional illuminates the edge of the target road is: Among them, L0 is the longitudinal length of the guardrail light, d0 is the distance between two adjacent guardrail lights, d is the lateral distance between the current guardrail light and the edge line, and w1 is the width of the edge line.

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