A vehicle safety sign warning system

Abstract

The present invention provides a vehicle-mounted safety sign warning system, which belongs to the technical field of safety warnings, and specifically comprises: a projection brightness determination module that projects a set brightness according to the ambient light brightness; a projection area determination module that is responsible for automatically identifying the lane of a broken-down vehicle and determining the projection area; a projection distance determination module that is responsible for determining the projection distance of a safety sign projection system; a projection safety sign output module that is responsible for outputting a projected safety sign according to the projection distance, the projection area and the projection set brightness; a projection distance optimization module that is responsible for obtaining the number of vehicles following the broken-down vehicle and the driving speed based on a preset period, and determining the optimal projection distance of the safety sign projection system in combination with the number of vehicles following the lane occupied by the broken-down vehicle and the driving speed, and optimizing the projection distance according to the optimal projection distance, thereby improving the setting efficiency and safety of the safety sign warning device.

Description

Technical Field

[0001] The invention belongs to the technical field of safety warnings, and in particular relates to a vehicle-mounted safety sign warning system. Background Art

[0002] When a vehicle breaks down, a warning device is often set in the vehicle's driving lane or a specific lane to avoid safety accidents such as the rear vehicle hitting the front vehicle. In the existing technical solutions, there are many ways to use projection to realize the setting of the warning device. Specifically, in "An Automobile Electronic Warning Sign System, Road Condition Warning System and Working Method thereof", a warning pattern and voice warning are quickly projected at a fixed distance behind the parking space after a car breaks down, which can prevent the occurrence of secondary traffic accidents. However, there are the following problems:

[0003] When performing projection, the different settings of the projection distance according to the vehicle's driving road conditions are neglected. Specifically, on different road conditions such as municipal roads and highways, the vehicle's driving speed and maximum speed limit are not the same. Therefore, if the projection distance cannot be set differently according to the driving road conditions, the safety of the vehicle cannot be guaranteed.

[0004] When projecting, the projection area is determined based on lane recognition without consideration. Specifically, on highways or other municipal roads, there are often multiple lanes. If the projection area is selected manually, not only is the adjustment speed slow, but it may also affect the normal driving of vehicles in other lanes. Therefore, if the projection cannot be automatically performed based on lane recognition, the safety of the vehicle cannot be guaranteed.

[0005] In view of the above technical problems, the present invention provides a vehicle-mounted safety sign warning system. Summary of the invention

[0006] To achieve the purpose of the present invention, the present invention adopts the following technical solutions:

[0007] According to one aspect of the present invention, a vehicle-mounted safety sign warning method is provided.

[0008] A vehicle-mounted safety sign warning method, characterized by comprising:

[0009] S11: obtaining the ambient light brightness, and when determining that the safety sign can be marked by projection according to the ambient light brightness, determining the projection setting brightness according to the ambient light brightness, automatically identifying the lane of the broken-down vehicle to obtain an identification result, and determining the projection area according to the identification result;

[0010] S12 determines the speed limit section and the number of lanes of the vehicle according to the type of the road where the broken-down vehicle is located, determines the projection distance of the safety sign projection system in combination with the number of lanes and lane widths occupied by the broken-down vehicle, and outputs the projected safety sign according to the projection distance, projection area, and projection setting brightness;

[0011] S13 determines the power consumption of the safety sign according to the projection distance, the projection area, and the projection setting brightness, and when it is determined that the projection distance can be optimized according to the power consumption and the remaining power of the safety sign projection system, proceeds to the next step;

[0012] S14 obtains the number and driving speed of the following vehicles of the broken-down vehicle based on a preset period, determines the optimal projection distance of the safety sign projection system in combination with the number and driving speed of the following vehicles in the lane occupied by the broken-down vehicle, and optimizes the projection distance according to the optimal projection distance.

[0013] A further technical solution is that when the ambient light brightness is greater than a preset brightness, it is determined that it is not possible to mark the safety sign by projection, and a suggestion to use a fixed warning sign is output.

[0014] A further technical solution is that the projection setting brightness is dynamically adjusted according to the ambient light brightness. Specifically, the higher the ambient light brightness is, the higher the projection setting brightness is.

[0015] A further technical solution is that the method for determining the recognition result is:

[0016] A road image of the road behind the broken-down vehicle is obtained, and the road image is converted into a grayscale image. An adaptive threshold is used to perform image segmentation on the grayscale image to obtain a segmented image, and lane detection is performed using a Canny detection operator and the segmented image to obtain a recognition result.

[0017] A further technical solution is that the method for determining the projection area is:

[0018] When the broken-down vehicle occupies a lane, the lane occupied by the broken-down vehicle is used as the projection area;

[0019] When the broken-down vehicle occupies multiple lanes, all the lanes occupied by the broken-down vehicle are used as projection areas.

[0020] A further technical solution is that the method for determining the projection distance of the broken-down vehicle is:

[0021] S21 determines the maximum driving speed and the minimum driving speed of the vehicle according to the speed limit interval of the vehicle, and determines the initial projection distance of the safety sign projection system according to the maximum driving speed and the minimum driving speed of the vehicle;

[0022] S22 determines the number of free lanes of the highway where the broken-down vehicle is located according to the number of lanes and the number of lanes occupied by the broken-down vehicle, and determines whether the initial projection distance meets the requirement through the number of free lanes, if yes, proceeds to the next step, if no, proceeds to step S24;

[0023] S23: determining whether the initial projection distance meets the requirement according to the number of vacant lanes adjacent to the lane occupied by the broken-down vehicle and the number of lanes occupied by the broken-down vehicle; if so, determining the projection distance of the safety sign according to the initial projection distance of the safety sign projection system;

[0024] S24 determines the risk avoidance difficulty of the following vehicle based on the number of vacant lanes adjacent to the lane occupied by the body of the broken-down vehicle, the number of lanes occupied by the broken-down vehicle, and the number of vacant lanes on the highway where the broken-down vehicle is located, and corrects the initial projection distance based on the risk avoidance difficulty to obtain the projection distance of the safety sign.

[0025] A further technical solution is that the projection distance of the safety sign is related to the difficulty of the following vehicle to avoid danger, wherein the greater the difficulty of the following vehicle to avoid danger, the longer the projection distance of the safety sign.

[0026] A further technical solution is to determine whether the projection distance can be optimized according to the power consumption and the remaining power of the safety sign projection system, which specifically includes:

[0027] The remaining working time of the safety sign projection system is determined according to the power consumption and the remaining power of the safety sign projection system, and whether the projection distance can be optimized is determined by the remaining working time and a preset time threshold.

[0028] In a second aspect, the present invention provides a vehicle-mounted safety sign warning system, which adopts the above-mentioned vehicle-mounted safety sign warning method, and is characterized in that it specifically includes:

[0029] Projection brightness determination module; projection area determination module; projection distance determination module; projection safety sign output module; projection distance optimization module;

[0030] The projection brightness determination module is responsible for obtaining the ambient light brightness, and when determining that the safety sign can be identified by projection according to the ambient light brightness, the projection setting brightness is determined according to the ambient light brightness;

[0031] The projection area determination module is responsible for automatically identifying the lane of the broken-down vehicle to obtain a recognition result, and determining the projection area according to the recognition result;

[0032] The projection distance determination module is responsible for determining the speed limit range and the number of lanes of the vehicle according to the type of the road where the broken-down vehicle is located, and determining the projection distance of the safety sign projection system in combination with the number of lanes and lane widths occupied by the broken-down vehicle;

[0033] The projection safety sign output module is responsible for outputting the projection safety sign according to the projection distance, projection area and projection setting brightness;

[0034] The projection distance optimization module is responsible for obtaining the number and driving speed of the following vehicles of the broken-down vehicle based on a preset period, and determining the optimal projection distance of the safety sign projection system in combination with the number and driving speed of the following vehicles in the lane occupied by the broken-down vehicle, and optimizing the projection distance according to the optimal projection distance.

[0035] The beneficial effects of the present invention are:

[0036] By identifying the ambient light brightness and automatically determining the projection area, the technical problem of low clarity of the projected safety sign due to high ambient light brightness is avoided, and dynamic adjustment of the projection setting brightness is achieved. At the same time, the automatic setting of the projection area is taken into account, thereby improving overall work efficiency.

[0037] By determining the projection distance of the safety sign projection system according to the type of highway and the number and width of lanes occupied by the broken-down vehicle, the projection distance can be determined from two perspectives: the vehicle driving conditions and the lane occupied by the broken-down vehicle. This ensures the accuracy of the projection distance while also ensuring the safety of the vehicle.

[0038] The optimal projection distance of the safety sign projection system is determined by the driving conditions of the vehicles behind the broken-down vehicle and the driving conditions of the vehicles behind the lane occupied by the broken-down vehicle, thereby realizing the determination of the optimal projection distance based on real-time driving data, and further ensuring the safety and reliability of driving.

[0039] Other features and advantages will be described in the following description, and partly become apparent from the description, or understood by practicing the invention. The purpose and other advantages of the invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the accompanying drawings;

[0042] Figure 1 is a flow chart of a fundus camera state detection method according to Embodiment 1;

[0043] Figure 2 is a flow chart of a method for determining an optimal projection distance of a safety sign projection system according to Embodiment 1;

[0044] Figure 3 It is a framework diagram of a vehicle-mounted safety sign warning system according to Example 2. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments of this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification.

[0046] Example 1

[0047] To solve the above problems, according to one aspect of the present invention, Figure 1 According to one aspect of the present invention, a vehicle-mounted safety sign warning method is provided, which is characterized by specifically comprising:

[0048] S11: obtaining the ambient light brightness, and when determining that the safety sign can be marked by projection according to the ambient light brightness, determining the projection setting brightness according to the ambient light brightness, automatically identifying the lane of the broken-down vehicle to obtain an identification result, and determining the projection area according to the identification result;

[0049] It should be noted that when the ambient light brightness is greater than the preset brightness, it is determined that the safety sign cannot be marked by projection, and a suggestion to use a fixed warning sign is output.

[0050] Specifically, the projection setting brightness is dynamically adjusted according to the ambient light brightness. Specifically, the higher the ambient light brightness is, the higher the projection setting brightness is.

[0051] It can be understood that the method for determining the recognition result is:

[0052] A road image of the road behind the broken-down vehicle is obtained, and the road image is converted into a grayscale image. An adaptive threshold is used to perform image segmentation on the grayscale image to obtain a segmented image, and lane detection is performed using a Canny detection operator and the segmented image to obtain a recognition result.

[0053] It should be noted that the method for determining the projection area is:

[0054] When the broken-down vehicle occupies a lane, the lane occupied by the broken-down vehicle is used as the projection area;

[0055] When the broken-down vehicle occupies multiple lanes, all the lanes occupied by the broken-down vehicle are used as projection areas.

[0056] S12 determines the speed limit section and the number of lanes of the vehicle according to the type of the road where the broken-down vehicle is located, determines the projection distance of the safety sign projection system in combination with the number of lanes and lane widths occupied by the broken-down vehicle, and outputs the projected safety sign according to the projection distance, projection area, and projection setting brightness;

[0057] Specifically, the method for determining the projection distance of the broken-down vehicle is:

[0058] S21 determines the maximum driving speed and the minimum driving speed of the vehicle according to the speed limit interval of the vehicle, and determines the initial projection distance of the safety sign projection system according to the maximum driving speed and the minimum driving speed of the vehicle;

[0059] S22 determines the number of free lanes of the highway where the broken-down vehicle is located according to the number of lanes and the number of lanes occupied by the broken-down vehicle, and determines whether the initial projection distance meets the requirement through the number of free lanes, if yes, proceeds to the next step, if no, proceeds to step S24;

[0060] S23: determining whether the initial projection distance meets the requirement according to the number of vacant lanes adjacent to the lane occupied by the broken-down vehicle and the number of lanes occupied by the broken-down vehicle; if so, determining the projection distance of the safety sign according to the initial projection distance of the safety sign projection system;

[0061] S24 determines the risk avoidance difficulty of the following vehicle based on the number of vacant lanes adjacent to the lane occupied by the body of the broken-down vehicle, the number of lanes occupied by the broken-down vehicle, and the number of vacant lanes on the highway where the broken-down vehicle is located, and corrects the initial projection distance based on the risk avoidance difficulty to obtain the projection distance of the safety sign.

[0062] Furthermore, the projection distance of the safety sign is related to the difficulty of the following vehicle to avoid danger, wherein the greater the difficulty of the following vehicle to avoid danger, the longer the projection distance of the safety sign.

[0063] S13 determines the power consumption of the safety sign according to the projection distance, the projection area, and the projection setting brightness, and when it is determined that the projection distance can be optimized according to the power consumption and the remaining power of the safety sign projection system, proceeds to the next step;

[0064] Specifically, determining whether the projection distance can be optimized according to the power consumption and the remaining power of the safety sign projection system includes:

[0065] The remaining working time of the safety sign projection system is determined according to the power consumption and the remaining power of the safety sign projection system, and whether the projection distance can be optimized is determined by the remaining working time and a preset time threshold.

[0066] S14 obtains the number and driving speed of the following vehicles of the broken-down vehicle based on a preset period, determines the optimal projection distance of the safety sign projection system in combination with the number and driving speed of the following vehicles in the lane occupied by the broken-down vehicle, and optimizes the projection distance according to the optimal projection distance.

[0067] Specific examples, such as Figure 2 As shown, the method for determining the optimal projection distance of the safety sign projection system is:

[0068] S31: acquiring the number and driving speed of the vehicles behind the broken-down vehicle through the preset period, and determining the recommended projection distance of the safety sign projection system through the number and average driving speed of the vehicles behind the broken-down vehicle;

[0069] S32 determines the speeding vehicle according to the driving speed of the rear vehicle of the broken-down vehicle, and when it is determined that the recommended projection distance of the safety sign projection system cannot meet the requirement according to the number of the speeding vehicles and the average driving speed of the speeding vehicles, the recommended projection distance of the safety sign projection system is corrected by the number of the speeding vehicles and the average driving speed of the speeding vehicles to obtain a corrected projection distance;

[0070] S33 obtains the number of rear vehicles in the lane occupied by the broken-down vehicle and the number of speeding vehicles in the rear vehicles in the lane occupied by the broken-down vehicle, and determines the real-time evaluation value of the difficulty of avoiding the rear vehicles in the lane in combination with the number of adjacent free lanes of the lane occupied by the broken-down vehicle, and determines whether the corrected projection distance meets the requirements according to the real-time evaluation value of the difficulty of avoiding the rear vehicles, and if so, determines the optimal projection distance of the safety sign projection system according to the corrected projection distance, and if not, proceeds to the next step;

[0071] S34 determines the projection compensation distance through the real-time evaluation value of the difficulty of avoiding the rear vehicle, the average speed of speeding vehicles in the lane occupied by the anchored vehicle, and the average speed of vehicles in the lane occupied by the anchored vehicle, and determines the optimal projection distance of the safety sign projection system based on the projection compensation distance and the corrected projection distance.

[0072] In the present invention, by identifying the ambient light brightness and automatically determining the projection area, the technical problem of low clarity of the projected safety sign due to high ambient light brightness is avoided, and dynamic adjustment of the projection setting brightness is achieved. At the same time, the automatic setting of the projection area is taken into consideration, thereby improving the overall work efficiency.

[0073] By determining the projection distance of the safety sign projection system according to the type of highway and the number and width of lanes occupied by the broken-down vehicle, the projection distance can be determined from two perspectives: the vehicle driving conditions and the lane occupied by the broken-down vehicle. This ensures the accuracy of the projection distance while also ensuring the safety of the vehicle.

[0074] The optimal projection distance of the safety sign projection system is determined by the driving conditions of the vehicles behind the broken-down vehicle and the driving conditions of the vehicles behind the lane occupied by the broken-down vehicle, thereby realizing the determination of the optimal projection distance based on real-time driving data, and further ensuring the safety and reliability of driving.

[0075] Example 2

[0076] On the other hand, Figure 3 As shown, the present invention provides a vehicle-mounted safety sign warning system, which adopts the above-mentioned vehicle-mounted safety sign warning method, and is characterized in that it specifically includes:

[0077] Projection brightness determination module; projection area determination module; projection distance determination module; projection safety sign output module; projection distance optimization module;

[0078] The projection brightness determination module is responsible for obtaining the ambient light brightness, and when determining that the safety sign can be identified by projection according to the ambient light brightness, the projection setting brightness is determined according to the ambient light brightness;

[0079] The projection area determination module is responsible for automatically identifying the lane of the broken-down vehicle to obtain a recognition result, and determining the projection area according to the recognition result;

[0080] The projection distance determination module is responsible for determining the speed limit range and the number of lanes of the vehicle according to the type of the road where the broken-down vehicle is located, and determining the projection distance of the safety sign projection system in combination with the number of lanes and lane widths occupied by the broken-down vehicle;

[0081] The projection safety sign output module is responsible for outputting the projection safety sign according to the projection distance, projection area and projection setting brightness;

[0082] The projection distance optimization module is responsible for obtaining the number and driving speed of the following vehicles of the broken-down vehicle based on a preset period, and determining the optimal projection distance of the safety sign projection system in combination with the number and driving speed of the following vehicles in the lane occupied by the broken-down vehicle, and optimizing the projection distance according to the optimal projection distance.

[0083] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device, equipment, and non-volatile computer storage medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0084] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0085] The above description is only one or more embodiments of this specification and is not intended to limit this specification. For those skilled in the art, one or more embodiments of this specification may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of one or more embodiments of this specification shall be included in the scope of the claims of this specification.

Claims

1. A vehicle safety sign warning method, characterized in that: Specifically include: Acquiring the ambient light brightness, and when determining that the safety sign can be marked by projection according to the ambient light brightness, determining the projection setting brightness according to the ambient light brightness, automatically identifying the lane of the broken-down vehicle to obtain an identification result, and determining the projection area according to the identification result; The speed limit range and the number of lanes of the vehicle are determined by the type of the road where the broken-down vehicle is located, and the projection distance of the safety sign projection system is determined in combination with the number of lanes and lane widths occupied by the broken-down vehicle, and the projection safety sign is output according to the projection distance, projection area and projection setting brightness; Determine the power consumption of the safety sign according to the projection distance, the projection area, and the projection setting brightness, and proceed to the next step when it is determined that the projection distance can be optimized according to the power consumption and the remaining power of the safety sign projection system; The number and driving speed of the vehicles behind the broken-down vehicle are obtained based on a preset period, and the optimal projection distance of the safety sign projection system is determined in combination with the number and driving speed of the vehicles behind the lane occupied by the broken-down vehicle, and the projection distance is optimized according to the optimal projection distance; The method for determining the projection distance of the broken-down vehicle is: S21 determines the maximum driving speed and the minimum driving speed of the vehicle according to the speed limit interval of the vehicle, and determines the initial projection distance of the safety sign projection system according to the maximum driving speed and the minimum driving speed of the vehicle; S22 determines the number of free lanes of the highway where the broken-down vehicle is located according to the number of lanes and the number of lanes occupied by the broken-down vehicle, and determines whether the initial projection distance meets the requirement through the number of free lanes, if yes, proceeds to the next step, if no, proceeds to step S24; S23: determining whether the initial projection distance meets the requirement according to the number of vacant lanes adjacent to the lane occupied by the broken-down vehicle and the number of lanes occupied by the broken-down vehicle; if so, determining the projection distance of the safety sign according to the initial projection distance of the safety sign projection system; S24 determines the risk avoidance difficulty of the following vehicle based on the number of vacant lanes adjacent to the lane occupied by the body of the broken-down vehicle, the number of lanes occupied by the broken-down vehicle, and the number of vacant lanes on the highway where the broken-down vehicle is located, and corrects the initial projection distance based on the risk avoidance difficulty to obtain the projection distance of the safety sign.

2. A vehicle safety sign warning method as claimed in claim 1, characterized in that: When the ambient light brightness is greater than the preset brightness, it is determined that the safety sign cannot be marked by projection, and a suggestion to use a fixed warning sign is output.

3. The vehicle safety sign warning method according to claim 1, characterized in that: The projection setting brightness is dynamically adjusted according to the ambient light brightness. Specifically, the higher the ambient light brightness is, the higher the projection setting brightness is.

4. The vehicle-mounted safety sign warning method according to claim 1, characterized in that: The method for determining the recognition result is: A road image of the road behind the broken-down vehicle is obtained, and the road image is converted into a grayscale image. An adaptive threshold is used to perform image segmentation on the grayscale image to obtain a segmented image, and lane detection is performed using a Canny detection operator and the segmented image to obtain a recognition result.

5. The vehicle-mounted safety sign warning method according to claim 1, characterized in that: The method for determining the projection area is: When the broken-down vehicle occupies a lane, the lane occupied by the broken-down vehicle is used as the projection area; When the broken-down vehicle occupies multiple lanes, all the lanes occupied by the broken-down vehicle are used as projection areas.

6. The vehicle-mounted safety sign warning method according to claim 1, characterized in that: The projection distance of the safety sign is related to the difficulty of avoiding danger for the following vehicle, wherein the greater the difficulty of avoiding danger for the following vehicle, the farther the projection distance of the safety sign is.

7. The vehicle-mounted safety sign warning method according to claim 1, characterized in that: Determining whether the projection distance can be optimized according to the power consumption and the remaining power of the safety sign projection system specifically includes: The remaining working time of the safety sign projection system is determined according to the power consumption and the remaining power of the safety sign projection system, and whether the projection distance can be optimized is determined by the remaining working time and a preset time threshold.

8. A vehicle-mounted safety sign warning system, using a vehicle-mounted safety sign warning method according to any one of claims 1 to 7, characterized in that: Specifically include: Projection brightness determination module; projection area determination module; projection distance determination module; projection safety sign output module; projection distance optimization module; The projection brightness determination module is responsible for obtaining the ambient light brightness, and when determining that the safety sign can be identified by projection according to the ambient light brightness, the projection setting brightness is determined according to the ambient light brightness; The projection area determination module is responsible for automatically identifying the lane of the broken-down vehicle to obtain a recognition result, and determining the projection area according to the recognition result; The projection distance determination module is responsible for determining the speed limit range and the number of lanes of the vehicle according to the type of the road where the broken-down vehicle is located, and determining the projection distance of the safety sign projection system in combination with the number of lanes and lane widths occupied by the broken-down vehicle; The projection safety sign output module is responsible for outputting the projection safety sign according to the projection distance, projection area and projection setting brightness; The projection distance optimization module is responsible for obtaining the number and driving speed of the following vehicles of the broken-down vehicle based on a preset period, and determining the optimal projection distance of the safety sign projection system in combination with the number and driving speed of the following vehicles in the lane occupied by the broken-down vehicle, and optimizing the projection distance according to the optimal projection distance.

Images