Road lighting early warning system and early warning method

Abstract

The invention discloses a road lighting early warning system and early warning method, and the method comprises the following steps: monitoring the rain and fog concentration of each road region of a target road at regular time, so as to judge whether the rain and fog concentration is greater than a preset threshold value or not; when the rain and fog concentration of any road area is larger than a preset threshold value, position distribution information of all vehicles in the corresponding road area is obtained, and the rear safety distance range of each vehicle in the road area is calculated according to the rain and fog concentration and the position distribution information; and according to the position distribution information and the corresponding rear safety distance range, directional early warning illumination in the rear safety distance range is carried out on each vehicle in the road area. According to the technical scheme, when the rain and fog concentration is large, directional early warning illumination within the rear safety distance range can be conducted on each vehicle in the road area with the large rain and fog concentration through the guardrail lamp beside the road, and therefore the driving safety in the rain and fog weather is greatly improved.

Description

Technical Field

[0001] This application relates to the technical field of road lighting, and particularly to a road lighting warning system and a warning method. Background Art

[0002] Since rainy and foggy weather will cause an increase in the water vapor content in the air, which in turn leads to a significant decrease in visibility during road driving. To avoid traffic accidents such as rear-end collisions, it is generally necessary to give certain driving safety warnings to the following vehicles. In existing roads, the main method is to turn on the rear fog lights during vehicle driving to give corresponding driving safety warnings to the following vehicles. However, in actual application, it is found that this driving safety warning method has a large potential safety hazard when facing rainy and foggy weather with high rain and fog concentration, because it is difficult for drivers to clearly see the rear fog lights of the vehicle in front. Summary of the Invention

[0003] The embodiments of this application provide a road lighting warning system and a warning method, aiming to improve the technical problem that there is a large potential safety hazard in the existing driving safety warning method when facing rainy and foggy weather with high rain and fog concentration, because it is difficult for drivers to clearly see the rear fog lights of the vehicle in front.

[0004] To this end, the embodiments of this application provide a road lighting warning system, including a controller and a plurality of guardrail lights. The plurality of guardrail lights are regularly distributed on one side or both sides of the target road. Each guardrail light is provided with a rain and fog concentration monitoring module, a vehicle position monitoring module, and at least one warning lighting module. The controller is electrically connected to all the rain and fog concentration monitoring modules, all the vehicle position monitoring modules, and all the warning lighting modules. Among them,

[0005] The rain and fog concentration monitoring module is used to regularly monitor the rain and fog concentration in the road area where the corresponding guardrail light is located and feedback it to the controller in real time;

[0006] The vehicle position monitoring module is used to monitor the vehicle positions in the road area where the corresponding guardrail light is located to obtain the position distribution information of all vehicles in the road area and feedback it to the controller in real time;

[0007] The controller is used to, when the rain and fog concentration in any of the road areas is greater than a preset threshold, obtain the position distribution information of all vehicles in the road area through the corresponding vehicle position monitoring module, and calculate the rear safety distance range of each vehicle in the road area according to the rain and fog concentration and the position distribution information, so as to control the warning lighting modules at the corresponding positions and in the corresponding quantities to work;

[0008] The warning lighting module is used to perform directional warning lighting within the rear safety distance range for each vehicle in the road area under the control of the controller.

[0009] Optionally, in some embodiments of the present application, the guardrail lamp includes a plurality of the warning lighting modules with different projection angles, and the projection angle of each warning lighting module corresponds to only one lane of the road area where the guardrail lamp is located, for directional warning lighting of vehicles in the corresponding lane.

[0010] Optionally, in some embodiments of the present application, the maximum projection angle α of each warning lighting module is:

[0011]

[0012] The light-emitting deflection angle θ of each warning lighting module is:

[0013]

[0014] Wherein, h is the installation height of the corresponding warning lighting module, s is the distance between the corresponding guardrail lamp and the roadside, n is the order of the corresponding lane relative to the corresponding guardrail lamp, when the corresponding lane is adjacent to the corresponding guardrail lamp, n = 1, and w is the lane width.

[0015] Optionally, in some embodiments of the present application, the longitudinal light distribution angle β of each warning lighting module on the road is less than

[0016] Optionally, in some embodiments of the present application, the warning lighting module is a red-yellow light lighting module. The rear safety distance range of each vehicle includes a first safety distance range close to the rear of the corresponding vehicle and a second safety distance range far from the rear of the corresponding vehicle. The red-yellow light lighting module is used to perform red light warning lighting for one of the first safety distance range and the second safety distance range, and yellow light warning lighting for the other.

[0017] In addition, an embodiment of the present application further provides a road lighting warning system, including a controller, a plurality of guardrail lamps, and a plurality of vehicle position monitoring modules. The plurality of guardrail lamps and the plurality of vehicle position monitoring modules are respectively regularly distributed on one side or both sides of the target road. Each guardrail lamp is provided with a rain and fog concentration monitoring module and at least one warning lighting module. The controller is electrically connected to all the rain and fog concentration monitoring modules, all the vehicle position monitoring modules, and all the warning lighting modules, wherein,

[0018] The rain and fog concentration monitoring module is used to regularly monitor the rain and fog concentration in the road area where the corresponding guardrail lights are located and feedback it to the controller in real time;

[0019] The vehicle position monitoring module is used to monitor the vehicle positions in the road area where it is located to obtain the position distribution information of all vehicles in the road area and feedback it to the controller in real time;

[0020] The controller is used to, when the rain and fog concentration in any of the road areas is greater than a preset threshold, obtain the position distribution information of all vehicles in the road area through the corresponding vehicle position monitoring module, and calculate the rear safety distance range of each vehicle in the road area according to the rain and fog concentration and the position distribution information, so as to control the warning lighting modules at the corresponding positions and in the corresponding quantities to work;

[0021] The warning lighting module is used to, under the control of the controller, perform directional warning lighting within the rear safety distance range of each vehicle in the road area.

[0022] In addition, an embodiment of the present application further provides a road lighting warning method, which is applied to the above road lighting warning system. The road lighting warning method includes the following steps:

[0023] Regularly monitor the rain and fog concentration in each road area of the target road to determine whether the rain and fog concentration is greater than a preset threshold;

[0024] When the rain and fog concentration in any of the road areas is greater than a preset threshold, obtain the position distribution information of all vehicles in the corresponding road area, and calculate the rear safety distance range of each vehicle in the road area according to the rain and fog concentration and the position distribution information;

[0025] According to the position distribution information and the corresponding rear safety distance range, perform directional warning lighting within the rear safety distance range of each vehicle in the road area.

[0026] Optionally, in some embodiments of the present application, the rear safety distance range of each vehicle includes a first safety distance range close to the rear of the corresponding vehicle and a second safety distance range far from the rear of the corresponding vehicle;

[0027] The first safety distance range is the range between the rear of the vehicle and the driving safety position. The driving safety position is located behind the vehicle and the distance between it and the vehicle is the first driving safety distance L1: L1 = k × v × t, where k is the rain and fog concentration coefficient, v is the maximum driving speed limit in the road area; t is the preset reaction time of the driver;

[0028] The second safety distance range is from the driving safety position to the driving safety warning position. The driving safety warning position is located behind the driving safety position, and the distance between the driving safety warning position and the driving safety position is the second driving safety distance L2: L2 < L1.

[0029] Optionally, in some embodiments of the present application, the step of performing directional warning lighting within the rear safety distance range for each vehicle in the road area includes:

[0030] Controlling the warning lighting modules at corresponding positions and in corresponding quantities to perform continuous red light lighting or non - continuous red light lighting within the first safety distance range of each vehicle, and controlling the warning lighting modules at corresponding positions and in corresponding quantities to perform continuous yellow light lighting or non - continuous yellow light lighting within the second safety distance range of each vehicle.

[0031] Optionally, in some embodiments of the present application, the step of performing directional warning lighting within the rear safety distance range for each vehicle in the road area includes:

[0032] Controlling the warning lighting modules at corresponding positions and in corresponding quantities to perform continuous yellow light lighting or non - continuous yellow light lighting within the first safety distance range of each vehicle, and controlling the warning lighting modules at corresponding positions and in corresponding quantities to perform continuous red light lighting or non - continuous red light lighting within the second safety distance range of each vehicle.

[0033] With the technical solution provided by the present application, through the above - mentioned structural and method - step settings, when the rain - fog concentration is relatively high, that is, when the rain - fog concentration exceeds the preset threshold, the guardrail lights beside the road can perform directional warning lighting within the rear safety distance range for each vehicle in the road area with a relatively high rain - fog concentration. When a rear vehicle enters the rear safety distance range of the previous vehicle, it can be timely informed through the corresponding directional warning lighting, so as to make corresponding deceleration treatment in time, thereby greatly improving the driving safety in rainy and foggy weather. It can be seen that this technical solution can effectively improve the existing driving safety warning method, which has a large driving safety hazard when facing rainy and foggy weather with a relatively high rain - fog concentration because it is difficult for the driver to clearly see the rear fog lights of the vehicle in front. Description of the Drawings

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0035] Figure 1 It is a structural block diagram of a road lighting warning system in an embodiment of the present application;

[0036] Figure 2 For Figure 1 It is a schematic diagram of the distribution of different vehicles and the lighting range in the road lighting warning system shown;

[0037] Figure 3 For Figure 1 It is a schematic diagram of the lateral projection of the road in the road lighting warning system shown;

[0038] Figure 4 For Figure 1 It is a schematic diagram of the maximum projection angle, the light emission deviation angle and the projection angle of the road cross-section warning lighting module in the road lighting warning system shown;

[0039] Figure 5 For Figure 1 It is a schematic diagram of the warning effect of discontinuous lighting of the road lighting warning system shown;

[0040] Figure 6 It is another structural block diagram of the road lighting warning system in an embodiment of the present application;

[0041] Figure 7 It is a flow block diagram of the road lighting warning method in an embodiment of the present application. Specific implementation manners

[0042] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0043] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0044] In addition, the descriptions involving "first", "second", etc. in this application are for descriptive purposes only, 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 may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions 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 this application.

[0045] In one embodiment, as Figures 1 to 6 shown, the embodiment of this application provides a road lighting warning system 100. The road lighting warning system 100 includes a controller 110 and a plurality of guardrail lights 120. The plurality of guardrail lights 120 are regularly distributed on one side or both sides of the target road. Each guardrail light 120 is provided with a rain and fog concentration monitoring module 121, a vehicle position monitoring module 122, and at least one warning lighting module 123. The controller 110 is electrically connected to all the rain and fog concentration monitoring modules 121, all the vehicle position monitoring modules 122, and all the warning lighting modules 123. Among them, the rain and fog concentration monitoring module 121 is mainly used to regularly monitor the rain and fog concentration in the road area where the corresponding guardrail light 120 is located and feedback it to the controller 110 in real time. The vehicle position monitoring module 122 is mainly used to monitor the vehicle positions in the road area where the corresponding guardrail light 120 is located to obtain the position distribution information of all vehicles in the road area and feedback it to the controller 110 in real time. The controller 110 is mainly used to, when the rain and fog concentration in any road area is greater than a preset threshold, obtain the position distribution information of all vehicles in the road area through the corresponding vehicle position monitoring module 122, and calculate the rear safety distance range 10 of each vehicle in the road area according to the rain and fog concentration and the position distribution information, so as to control the corresponding position and the corresponding number of warning lighting modules 123 to work. The warning lighting module 123 is mainly used to, under the control of the controller 110, perform directional warning lighting within the rear safety distance range 10 of each vehicle in the road area.

[0046] It can be understood that the road lighting warning system 100 in the embodiment of this application is mainly applied to one-way roads such as highways to perform road warning lighting in cases of low visibility such as rain and fog weather to ensure driving safety. The above-mentioned regular distribution of the plurality of guardrail lights 120 on one side or both sides of the target road specifically means that the plurality of guardrail lights 120 can be, for example, as Figure 2As shown, they are evenly distributed on both sides of the target road, or they can be evenly distributed on either side of the target road, or they are staggered on both sides of the target road. The guardrail lights 120 mentioned above can specifically be low-position lighting fixtures. Compared with conventional street lights, due to their relatively high installation height, in rainy and foggy weather with low visibility, it is difficult for the light to penetrate the fog and illuminate the road surface. The low-position lighting fixtures in the embodiments of the present application can reduce the distance for the light emitted by the fixtures to reach the road surface, thereby achieving better effects. The rain and fog concentration monitoring module 121 mentioned above can specifically be a common rain and fog concentration detection sensor. The vehicle position monitoring module 122 mentioned above can specifically obtain the distribution and position information of different vehicles in the corresponding road area through conventional detection methods such as lidar.

[0047] In this way, for the road lighting warning system 100 in the embodiments of the present application, when the rain and fog concentration is relatively high, that is, when the rain and fog concentration exceeds the preset threshold, it can perform directional warning lighting within the rear safety distance range 10 for each vehicle in the road area with a relatively high rain and fog concentration through the guardrail lights 120 beside the road. When a rear vehicle enters within the rear safety distance range 10 of the previous vehicle, it can be timely informed through the corresponding directional warning lighting, so as to make a corresponding deceleration treatment in a timely manner, thereby greatly improving the driving safety in rainy and foggy weather.

[0048] In some examples, as Figure 1 and Figure 3 shown, the guardrail lights 120 can specifically include a plurality of warning lighting modules 123 with different projection angles. The projection angle of each warning lighting module 132 is set only corresponding to one lane in the road area where the guardrail lights 120 are located, for the directional warning lighting of the vehicles in the corresponding lane. In this way, through the above structural settings, no matter which vehicle is driving in the corresponding road area, there is a corresponding warning lighting module 123 for corresponding directional warning lighting. At the same time, since the projection angle of each warning lighting module 123 is set only corresponding to one lane in the road area where the guardrail lights 120 are located, it can effectively avoid the situation where the warnings between different lanes affect each other and cause warning confusion.

[0049] It can be understood that taking Figure 3 the road area including three lanes as an example, the corresponding guardrail lights 120 should include at least three warning lighting modules 123. Among them, the projection angle of the first warning lighting module 123 is set only corresponding to lane 1, the projection angle of the second warning lighting module 123 is set only corresponding to lane 2, and the projection angle of the third warning lighting module 123 is set only corresponding to lane 3.

[0050] In some examples, as Figure 1 and Figure 4 shown, the maximum projection angle α of each warning lighting module 123 is:

[0051]

[0052] The light-emitting deflection angle θ of each warning lighting module is as follows:

[0053]

[0054] Wherein, h is the installation height of the corresponding warning lighting module 123, s is the distance between the corresponding guardrail lamp 120 and the roadside, n is the order of the corresponding lane relative to the corresponding guardrail lamp. When the corresponding lane is adjacent to the corresponding guardrail lamp 120, n = 1, and w is the lane width.

[0055] In this way, through the above structural settings, it is possible to effectively prevent the problem of mutual interference between illuminations of different lanes by controlling the maximum projection angle of each warning lighting module 123 to be only α. It is also possible to control the light-emitting deflection angle of each warning lighting module 123 to be θ, so that each warning lighting module 123 irradiates the middle position of the corresponding lane, further ensuring the directional warning lighting effect of each warning lighting module 123.

[0056] In some examples, such as Figure 1 and Figure 5 shown, the longitudinal light distribution angle β of each warning lighting module 123 on the road is less than In this way, through the above structural settings, discontinuous lighting can be achieved to obtain a more obvious warning effect.

[0057] It can be understood that if continuous lighting is to be achieved, the longitudinal light distribution angle β of each warning lighting module 123 on the road can be made greater than

[0058] In some examples, such as Figure 1 and Figure 2 shown, the warning lighting module 123 can specifically be a red-yellow light lighting module. The rear safety distance range 10 of each vehicle includes a first safety distance range 11 close to the rear of the corresponding vehicle and a second safety distance range 12 far from the rear of the corresponding vehicle. The red-yellow light lighting module 123 is used to perform red light warning lighting on one of the first safety distance range 11 and the second safety distance range 12, and yellow light warning lighting on the other. In this way, through the above structural settings, since the fog penetration ability of red light and yellow light is stronger than that of white light, the warning lighting module 123 using red-yellow light lighting can achieve better effects in rainy and foggy weather.

[0059] It can be understood that when the red and yellow light illumination module in this example performs red light warning illumination on the first safety distance range 11 and yellow light warning illumination on the second safety distance range 11, the yellow light illumination area is the safety warning buffer zone, reminding the following vehicle that it has approached the driving safety distance and should concentrate. The length of the yellow light illumination area should not exceed the driving safety distance to improve driving efficiency. The length of the red light illumination area can be set as the driving safety distance. When the following vehicle finds that it is in the red light illumination area, it should slow down. And when the red and yellow light illumination module in this example performs yellow light warning illumination on the first safety distance range 11 and red light warning illumination on the second safety distance range 11, the red light illumination area is for early warning and the yellow light illumination area is for deceleration warning.

[0060] In addition, the spot brightness of the red and yellow light illumination module can be gradually changed or flickered to achieve a more obvious warning effect. When controlling the corresponding positions and corresponding numbers of the warning illumination modules 123 to work for directional warning illumination on the first safety distance range 11, if the illumination length of the first safety distance range 11 is set as the first driving safety distance L1, the number of lit lamps can ensure that the illumination length is greater than L2. Similarly, when controlling the corresponding positions and corresponding numbers of the warning illumination modules 123 to work for directional warning illumination on the second safety distance range 12, if the illumination length of the second safety distance range 12 is set as the second driving safety distance L2, the number of lit lamps can ensure that the illumination length is greater than L2. Wherein, d above is the distance between two adjacent guardrail lights 120, and a is the lamp length of the warning illumination module 123.

[0061] In one embodiment, as Figure 6As shown in the figure, an embodiment of the present application further provides a road lighting warning system 200. The road lighting warning system 200 includes a controller 210, a plurality of guardrail lights 220, and a plurality of vehicle position monitoring modules 230. The plurality of guardrail lights 220 and the plurality of vehicle position monitoring modules 230 are respectively regularly distributed on one side or both sides of the target road. Each guardrail light 220 is provided with a rain and fog concentration monitoring module 221 and at least one warning lighting module 222. The controller 210 is electrically connected to all the rain and fog concentration monitoring modules 221, all the vehicle position monitoring modules 230, and all the warning lighting modules 222. Among them, the rain and fog concentration monitoring module 221 is mainly used to regularly monitor the rain and fog concentration in the road area where the corresponding guardrail light 220 is located and feedback it to the controller 210 in real time. The vehicle position monitoring module 230 is mainly used to monitor the vehicle positions in the road area where it is located to obtain the position distribution information of all vehicles in the road area and feedback it to the controller 210 in real time. The controller 210 is mainly used to, when the rain and fog concentration in any road area is greater than a preset threshold, obtain the position distribution information of all vehicles in the road area through the corresponding vehicle position monitoring module, and calculate the rear safety distance range of each vehicle in the road area according to the rain and fog concentration and the position distribution information, so as to control the warning lighting modules 222 at the corresponding positions and in the corresponding quantities to work. The warning lighting module 222 is mainly used to perform directional warning lighting within the rear safety distance range of each vehicle in the road area under the control of the controller 210.

[0062] It can be understood that the structure of the road lighting warning system 200 in the embodiment of the present application is basically the same as that of the road lighting warning system 100 in the previous application embodiment. The difference is only that its vehicle position monitoring module 230 is separately provided, rather than the vehicle position monitoring module 122 of the road lighting warning system 100 in the previous application embodiment being built into the corresponding guardrail light 120. At this time, since the vehicle position monitoring module 230 in the embodiment of the present application is a structure independent of the guardrail light 120, therefore, its layout can refer to the layout method of the guardrail light 120 to ensure that it can monitor the vehicle positions in the road area where it is located to obtain the position distribution information of all vehicles in the road area. Therefore, the layout method of the vehicle position monitoring module 230 and the layout method of the guardrail light 220 in the embodiment of the present application can both refer to the layout method of the guardrail light 120, which will not be elaborated here.

[0063] In this way, for the road lighting warning system 200 in the embodiments of the present application, when the rain and fog concentration is relatively high, that is, when the rain and fog concentration exceeds the preset threshold, the guardrail lights 220 beside the road can perform directional warning lighting within the rear safety distance range for each vehicle in the road area with a relatively high rain and fog concentration. When a rear vehicle enters the rear safety distance range of the previous vehicle, it can be informed in time through the corresponding directional warning lighting, so as to make a corresponding deceleration treatment in time, thereby greatly improving the driving safety in rainy and foggy weather.

[0064] In one embodiment, as Figure 7 shown, the embodiments of the present application further provide a road lighting warning method, and this road lighting warning method includes the following steps:

[0065] Step S110: Regularly monitor the rain and fog concentration of each road area of the target road to determine whether the rain and fog concentration is greater than the preset threshold.

[0066] It can be understood that, as Figures 1 to 6 shown, the road lighting warning method in the embodiments of the present application can be specifically applied to the road lighting warning system 100 or 200 in the above embodiments. Taking Figure 1 the road lighting warning system 100 shown as an example, since multiple guardrail lights 120 are equally spaced on both sides of the target road as Figure 2 shown, therefore, the rain and fog concentration monitoring module 121 of the multiple guardrail lights 120 can be used to regularly monitor the rain and fog concentration of each road area of the target road to determine whether the rain and fog concentration is greater than the preset threshold, so that other modules of the road lighting warning system 100 except the rain and fog concentration monitoring module 121 only work when the rain and fog concentration is greater than the preset threshold, so as to achieve the purpose of energy saving.

[0067] Step S120: When the rain and fog concentration of any road area is greater than the preset threshold, obtain the position distribution information of all vehicles in the corresponding road area, and calculate the rear safety distance range of each vehicle in the road area according to the rain and fog concentration and the position distribution information.

[0068] It can be understood that, as Figures 1 to 5 shown, when it is detected through the above method steps that the rain and fog concentration of any road area is greater than the preset threshold, the position monitoring module 122 of all vehicles in the corresponding road area can be controlled to work to obtain the position distribution information of all vehicles in the corresponding road area, and calculate the rear safety distance range 10 of each vehicle in the corresponding road area according to the rain and fog concentration and the position distribution information.

[0069] Step S130: According to the position distribution information and the corresponding rear safety distance range, perform directional warning lighting within the rear safety distance range for each vehicle in the road area.

[0070] It can be understood that, as Figures 1 to 5 shown, when the position distribution information of all vehicles in the corresponding road area and the rear safety distance range 10 of each vehicle in the corresponding road area are obtained through the above method steps, then, based on the position distribution information and the corresponding rear safety distance range 10, directional warning lighting within the rear safety distance range can be carried out for each vehicle in the corresponding road area, that is, lighting (preferably yellow light and / or red light lighting) is carried out within a certain distance range (i.e., the rear safety distance range) behind each vehicle in the corresponding road area, so as to remind the following vehicle whether it has entered this distance range and whether corresponding deceleration treatment should be carried out.

[0071] In this way, through the above method steps, when the rain and fog concentration is relatively high, that is, when the rain and fog concentration exceeds the preset threshold, the guardrail lights 220 beside the road can carry out directional warning lighting within the rear safety distance range for each vehicle in the road area with a relatively high rain and fog concentration, so that when the following vehicle enters the rear safety distance range of the previous vehicle, it can be timely informed through the corresponding directional warning lighting and make corresponding deceleration treatment in time, thereby greatly improving the driving safety in rainy and foggy weather.

[0072] In some examples, as Figures 1 to 5 shown, the rear safety distance range 10 of each vehicle may specifically include a first safety distance range 11 close to the rear of the corresponding vehicle and a second safety distance range 12 far from the rear of the corresponding vehicle. Among them, the first safety distance range 11 is the range between the rear of the vehicle and the driving safety position, and the driving safety position is located behind the vehicle and the distance from the vehicle is the first driving safety distance L1: L1 = k × v × t, where k is the rain and fog concentration coefficient, v is the maximum driving speed limit of the road area, and t is the preset reaction time of the driver. The second safety distance range 12 is from the driving safety position to the driving safety warning position, and the driving safety warning position is located behind the driving safety position and the distance from the driving safety position is the second driving safety distance L2:

[0073] L2 < L1. In this way, through the above structural settings, a reasonable safety distance range can be formed. While improving the driving efficiency, it can ensure that when the distance between the following vehicle and the previous vehicle is less than the first driving safety distance L1, the following vehicle can decelerate slowly in time to ensure driving safety in rainy and foggy weather.

[0074] It can be understood that in the rain and fog concentration coefficient k in this example, the k value is greater than 1, and the greater the monitored rain and fog concentration, the greater the k value. In the preset reaction time t of the driver in this example, it is usually assumed that the reaction time of the driver is 1.0 second to 2.5 seconds, and in low visibility conditions, the t value should be taken as 2.5 seconds.

[0075] In some examples, such as Figures 1 to 5 shown, the specific process of executing the above method step S130 is as follows: controlling the warning lighting modules at corresponding positions and in corresponding quantities to perform continuous red lighting or non - continuous red lighting within the first safety distance of each vehicle, and controlling the warning lighting modules at corresponding positions and in corresponding quantities to perform continuous yellow lighting or non - continuous yellow lighting within the second safety distance of each vehicle. Thus, through the setting of the above method steps, the yellow lighting area is a safety warning buffer zone, reminding the following vehicle that it has approached the driving safety distance and should concentrate. The length of the yellow lighting area should not exceed the driving safety distance to improve driving efficiency. The length of the red lighting area can be set as the driving safety distance. When the following vehicle finds that it is in the red lighting area, it should slow down. At the same time, compared with the continuous lighting method, it can improve the continuity of road lighting. When it adopts the non - continuous lighting method, it has a more obvious warning effect.

[0076] In some examples, the specific process of executing the above method step S130 is as follows: controlling the warning lighting modules at corresponding positions and in corresponding quantities to perform continuous yellow lighting or non - continuous yellow lighting within the first safety distance of each vehicle, and controlling the warning lighting modules at corresponding positions and in corresponding quantities to perform continuous red lighting or non - continuous red lighting within the second safety distance of each vehicle. Thus, through the setting of the above method steps, the red lighting area can be made for early warning and the yellow lighting area for deceleration warning.

[0077] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. 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 for 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 road lighting warning system, characterized in that: It includes a controller and a plurality of guardrail lights, wherein the plurality of guardrail lights are regularly distributed on one side of a target road or on both sides of a target road, each of the guardrail lights is provided with a rain and fog concentration monitoring module, a vehicle position monitoring module and at least one early warning lighting module, and the controller is electrically connected to all the rain and fog concentration monitoring modules, all the vehicle position monitoring modules and all the early warning lighting modules, wherein: The rain and fog concentration monitoring module is used to regularly monitor the rain and fog concentration of the road area where the corresponding guardrail lamp is located, and provide real-time feedback to the controller; The vehicle position monitoring module is used to monitor the vehicle position of the road area where the corresponding guardrail light is located, so as to obtain the position distribution information of all vehicles in the road area and feed it back to the controller in real time; The controller is used to obtain the position distribution information of all vehicles in the road area through the corresponding vehicle position monitoring module when the rain and fog concentration in any of the road areas is greater than a preset threshold, and calculate the rear safety distance range of each vehicle in the road area according to the rain and fog concentration and the position distribution information, so as to control the corresponding position and the corresponding number of warning lighting modules to work; The warning lighting module is used to perform directional warning lighting within a rear safety distance range for each vehicle in the road area under the control of the controller.

2. The road lighting warning system according to claim 1, characterized in that: The guardrail light comprises a plurality of warning lighting modules with different projection angles, and the projection angle of each warning lighting module is only set corresponding to one lane of the road area where the guardrail light is located, so as to be used for directional warning lighting of vehicles in the corresponding lane.

3. The road lighting warning system according to claim 2, characterized in that: The maximum projection angle α of each warning lighting module is: The light deflection angle θ of each warning lighting module is: Among them, h is the installation height of the corresponding warning lighting module, s is the distance between the corresponding guardrail light and the roadside, n is the order of the corresponding lane relative to the corresponding guardrail light, when the corresponding lane is adjacent to the corresponding guardrail light, n=1, and w is the lane width.

4. The road lighting warning system according to claim 2, characterized in that: Each of the warning lighting modules has a longitudinal light distribution angle β less than 5. The road lighting warning system according to claim 1, characterized in that: The warning lighting module is a red-yellow light lighting module. The rear safety distance range of each vehicle includes a first safety distance range close to the rear of the corresponding vehicle and a second safety distance range far from the rear of the corresponding vehicle. The red-yellow light lighting module is used to perform red light warning lighting for one of the first safety distance range and the second safety distance range, and to perform yellow light warning lighting for the other.

6. A road lighting warning system, characterized in that: It includes a controller, a plurality of guardrail lights and a plurality of vehicle position monitoring modules, wherein the plurality of guardrail lights and the plurality of vehicle position monitoring modules are regularly distributed on one side of a target road or on both sides of a target road, each of the guardrail lights is provided with a rain and fog concentration monitoring module and at least one early warning lighting module, and the controller is electrically connected to all the rain and fog concentration monitoring modules, all the vehicle position monitoring modules and all the early warning lighting modules, wherein: The rain and fog concentration monitoring module is used to regularly monitor the rain and fog concentration of the road area where the corresponding guardrail lamp is located, and provide real-time feedback to the controller; The vehicle position monitoring module is used to monitor the vehicle position in the road area to obtain the position distribution information of all vehicles in the road area and feed it back to the controller in real time; The controller is used to obtain the position distribution information of all vehicles in the road area through the corresponding vehicle position monitoring module when the rain and fog concentration in any of the road areas is greater than a preset threshold, and calculate the rear safety distance range of each vehicle in the road area according to the rain and fog concentration and the position distribution information, so as to control the corresponding position and the corresponding number of warning lighting modules to work; The warning lighting module is used to perform directional warning lighting within a rear safety distance range for each vehicle in the road area under the control of the controller.

7. A road lighting warning method, characterized in that: Applied to the road lighting warning system as claimed in any one of claims 1 to 6, the road lighting warning method comprises the following steps: Regularly monitoring the rain and fog concentration of each road area of ​​the target road to determine whether the rain and fog concentration is greater than a preset threshold; When the rain and fog concentration of any of the road areas is greater than a preset threshold, obtaining the position distribution information of all vehicles in the corresponding road area, and calculating the rear safety distance range of each vehicle in the road area according to the rain and fog concentration and the position distribution information; According to the position distribution information and the corresponding rear safety distance range, directional warning lighting is performed on each of the vehicles in the road area within the rear safety distance range.

8. The road lighting warning method according to claim 7, characterized in that: The rear safety distance range of each vehicle includes a first safety distance range close to the rear of the corresponding vehicle and a second safety distance range far from the rear of the corresponding vehicle; The first safety distance range is the range from the rear of the vehicle to the driving safety position, the driving safety position is located behind the vehicle, and the distance between the driving safety position and the vehicle is the first driving safety distance L1: L1 = k × v × t, where k is the rain and fog concentration coefficient, v is the maximum speed limit of the road area; t is the preset reaction time of the driver; The second safety distance range is from the driving safety position to the driving safety warning position. The driving safety warning position is located behind the driving safety position, and the distance between the driving safety position and the driving safety position is the second driving safety distance L2: L2 <L1。 9. The road lighting warning method according to claim 8, characterized in that: The step of performing directional warning lighting within a rear safety distance range for each of the vehicles in the road area comprises: Control the corresponding positions and the corresponding number of the warning lighting modules to perform continuous red light illumination or discontinuous red light illumination within the first safety distance range of each of the vehicles, and control the corresponding positions and the corresponding number of the warning lighting modules to perform continuous yellow light illumination or discontinuous yellow light illumination within the second safety distance range of each of the vehicles.

10. The road lighting warning method according to claim 8, characterized in that: The step of performing directional warning lighting within a rear safety distance range for each of the vehicles in the road area comprises: Control the corresponding positions and the corresponding number of the warning lighting modules to perform continuous yellow light illumination or discontinuous yellow light illumination within the first safety distance range of each of the vehicles, and control the corresponding positions and the corresponding number of the warning lighting modules to perform continuous red light illumination or discontinuous red light illumination within the second safety distance range of each of the vehicles.

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