Driving safety early warning method and device, machine readable storage medium and vehicle

Abstract

The application relates to a driving safety early warning method and device, a machine readable storage medium and a vehicle, and belongs to the technical field of driving safety early warning. The method comprises the following steps: acquiring driving speed, front obstacle information, map information, road flatness information and road covering information of a vehicle in a driving process; determining a safety distance of the vehicle based on the driving speed and the road covering information; determining a driving recommended speed of the vehicle based on the safety distance, the front obstacle information, the map information and the road flatness information; and performing driving safety early warning based on the driving speed and the driving recommended speed. The application can accurately calculate the safety distance of the vehicle according to the driving speed and the road covering information of the vehicle, and can perform driving safety early warning on the driver of the vehicle according to the driving recommended speed determined based on the safety distance, the front obstacle information, the map information and the road flatness information, so that the driving comfort is improved, and the safety of driving is ensured.

Description

Technical Field

[0001] This invention relates to the field of driving safety warning technology, specifically to a driving safety warning method, a driving safety warning device, a machine-readable storage medium, and a vehicle. Background Technology

[0002] With the continuous development of the automotive industry, the number of cars on the road is also increasing. However, for some drivers with limited driving experience, it is difficult to accurately judge the braking distance of a vehicle under different road conditions and weather conditions, as well as the speed of the vehicle when passing through different road sections. This makes it difficult for drivers to brake in time and accurately control their speed when facing dangerous factors such as obstacles, rear-end collisions, sharp bends, and ditches, resulting in safety accidents such as vehicle collisions and vehicles falling off cliffs. Summary of the Invention

[0003] One objective of this invention is to provide a driving safety warning method to address the problem in the prior art where some drivers with limited driving experience are unable to brake in time or accurately control their speed when faced with dangerous factors such as obstacles, rear-end collisions, sharp bends, and ditches, resulting in safety accidents such as vehicle collisions and vehicles falling off cliffs. A second objective is to provide a driving safety warning device. A third objective is to provide a machine-readable storage medium. A fourth objective is to provide a vehicle.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A driving safety warning method, the method comprising:

[0006] Acquire information on the vehicle's speed, obstacles ahead, map data, road surface smoothness, and road cover during its operation;

[0007] Based on the driving speed and the road surface cover information, determine the safe distance of the vehicle;

[0008] Based on the safe distance, the information on obstacles ahead, the map information, and the road surface smoothness information, the recommended driving speed for this vehicle is determined;

[0009] Driving safety warnings are issued based on the driving speed and the recommended driving speed.

[0010] Based on the aforementioned technical methods, many drivers currently lack driving experience. These drivers often struggle to accurately judge braking distances and vehicle speeds under varying road conditions and weather conditions. This makes it difficult for them to brake promptly and control their speed effectively when facing obstacles, rear-end collisions, sharp bends, ditches, or other hazards, leading to accidents such as collisions and vehicles falling off cliffs. Therefore, this system determines the vehicle's safe distance based on its speed and road surface information. Then, based on this safe distance, information on obstacles ahead, map data, and road surface smoothness, a recommended speed is determined. By comparing this recommended speed with the actual speed, a driving safety warning is provided to the driver, improving driving comfort, enhancing safety, and reducing the occurrence of accidents.

[0011] Furthermore, the road surface covering information includes at least one of the following: no road surface covering, road surface covering is water accumulation, road surface covering is ice, and road surface covering is snow.

[0012] Based on the driving speed and the road surface cover information, a safe distance for the vehicle is determined, including:

[0013] Based on the road surface cover information, a preset friction coefficient between the vehicle and the road surface is determined through a preset correspondence relationship. The preset correspondence relationship is used to characterize the preset friction coefficient between the vehicle and the road surface corresponding to different road surface covers.

[0014] Based on the driving speed and the preset friction coefficient, the braking distance of the vehicle is determined;

[0015] Based on the braking distance, determine the safe distance for this vehicle.

[0016] Based on the aforementioned technical means, since the road surface friction coefficient varies under conditions of water accumulation, snow accumulation, and icy surfaces, the braking distance of a vehicle will also change under the same driving conditions. Therefore, by acquiring information about the road surface cover, the preset friction coefficient between the vehicle and the road surface can be obtained, thereby accurately calculating the vehicle's braking distance. In order to allow for some braking reaction time and further avoid the problem of complete braking in actual situations, a safe distance for the vehicle is determined based on the vehicle's braking distance; the safe distance for the vehicle is greater than the vehicle's braking distance.

[0017] Furthermore, based on the driving speed and the road surface cover information, a safe distance for the vehicle is determined, including:

[0018] The safe distance for this vehicle is calculated using the following formula:

[0019]

[0020] Among them, S 安全 This is the safe distance for this vehicle; S 刹车 This is the braking distance of the vehicle; S 预设 is a constant; V is the vehicle's speed; g is the gravitational acceleration; u is the preset friction coefficient; t is the driver's reaction time.

[0021] Based on the above technical means and using the above calculation formula, the braking distance and safe distance of this vehicle can be accurately calculated.

[0022] Furthermore, the road surface smoothness information includes at least one of the following: the road surface is smooth, the road surface has potholes, and the road surface has bumps;

[0023] Based on the safe distance, the information on obstacles ahead, the map information, and the road surface smoothness information, the recommended driving speed for this vehicle is determined, including:

[0024] Determine whether there is an obstacle in front of the vehicle within the safe distance. If there is an obstacle, determine the recommended driving speed based on the distance between the vehicle and the obstacle. If there is no obstacle, determine whether there is a pothole on the road surface in front of the vehicle within the safe distance.

[0025] If a pothole exists and its width is greater than a preset width, the recommended driving speed is determined based on the distance between the vehicle and the pothole. If no pothole exists, it is determined whether there is a bump on the road surface in front of the vehicle within the safe distance.

[0026] If a protrusion exists and its vertical height is greater than a preset height, the recommended driving speed is determined based on the distance between the vehicle and the protrusion. If no protrusion exists, it is determined whether there is a curve in the road ahead of the vehicle within the safe distance.

[0027] If there is a curve and the radius of curvature of the curve is greater than the preset radius of curvature, the recommended driving speed is determined based on the radius of curvature of the curve; if there is no curve, the current driving speed of the vehicle is determined as the recommended driving speed.

[0028] Based on the aforementioned technical means, the recommended driving speed of the vehicle is determined by considering multiple different external environmental factors, such as whether there are obstacles in front of the vehicle within a safe distance, whether there are potholes with a width greater than a preset width, whether there are protrusions with a vertical height greater than a preset height, and whether there are curves with a radius of curvature greater than a preset radius of curvature. The data is comprehensive and can ensure the accuracy of the recommended driving speed, thereby providing the driver with accurate data reference.

[0029] Furthermore, the suggested driving speed is calculated based on the distance between the vehicle and the obstacle, determined based on the distance between the vehicle and the pothole, and determined based on the distance between the vehicle and the bump, including:

[0030] The recommended driving speed is calculated using the following formula:

[0031]

[0032] Among them, V 建议 Recommended driving speed; S 实际 denoted as , where is the distance between the vehicle and the obstacle, or the distance between the vehicle and the dent, or the distance between the vehicle and the protrusion; g is the acceleration due to gravity; and u is the preset coefficient of friction.

[0033] Based on the aforementioned technical means and calculation formula, an accurate recommended driving speed can be calculated based on the actual distance.

[0034] Furthermore, determining the recommended driving speed based on the radius of curvature of the curve includes:

[0035] The recommended driving speed is calculated using the following formula:

[0036]

[0037] Among them, V 建议 ε is the suggested driving speed; g is the correction coefficient; u is the gravitational acceleration; R is the radius of curvature of the curve.

[0038] Based on the aforementioned technical means and calculation formulas, an accurate recommended driving speed can be calculated according to the radius of curvature of the curve.

[0039] Furthermore, based on the driving speed and the recommended driving speed, a driving safety warning is issued, including:

[0040] If the driving speed is greater than the recommended driving speed, the recommended driving speed will be displayed and announced via voice.

[0041] Based on the aforementioned technical means, synchronous broadcasts are made via voice and central control screen display to ensure that the driver can obtain timely and accurate driving speed suggestions and control the vehicle.

[0042] Furthermore, the method also includes:

[0043] The method further includes providing voice safety reminders in one or more of the following situations:

[0044] There is an obstacle in front of the vehicle within the specified safe distance;

[0045] There is a pit within the safe distance, and the width of the pit is greater than the preset width;

[0046] There is a protrusion within the safe distance, and the vertical height of the protrusion is greater than the preset height;

[0047] There is a curve within the safe distance, and the radius of curvature of the curve is greater than the preset radius of curvature.

[0048] Based on the aforementioned technical means, when the above-mentioned dangerous situations exist, synchronous broadcasting of voice prompts can ensure that the driver receives timely and accurate driving speed suggestions, controls the vehicle, and improves driving safety.

[0049] A driving safety warning device, the device comprising:

[0050] The data acquisition module is used to acquire the vehicle's speed, information on obstacles ahead, map information, road surface smoothness information, and road surface cover information during the driving process.

[0051] The safe distance determination module is used to determine the safe distance of the vehicle based on the driving speed and the road surface cover information;

[0052] The recommended speed determination module is used to determine the recommended driving speed of the vehicle based on the safe distance, the obstacle information ahead, the map information, and the road surface smoothness information.

[0053] The safety warning module is used to provide driving safety warnings based on the driving speed and the recommended driving speed.

[0054] Based on the aforementioned technical methods, many drivers currently lack driving experience. These drivers often struggle to accurately judge braking distances and vehicle speeds under varying road conditions and weather conditions. This makes it difficult for them to brake promptly and control their speed effectively when facing obstacles, rear-end collisions, sharp bends, ditches, or other hazards, leading to accidents such as collisions and vehicles falling off cliffs. Therefore, this system determines the vehicle's safe distance based on its speed and road surface information. Then, based on this safe distance, information on obstacles ahead, map data, and road surface smoothness, a recommended speed is determined. By comparing this recommended speed with the actual speed, a driving safety warning is provided to the driver, improving driving comfort, enhancing safety, and reducing the occurrence of accidents.

[0055] A machine-readable storage medium storing instructions for causing a machine to perform the aforementioned driving safety warning method.

[0056] A vehicle including the aforementioned driving safety warning device.

[0057] The beneficial effects of this invention are:

[0058] (1) The present invention has the ability to accurately calculate the safe distance of the vehicle based on the vehicle's driving speed and road surface information, and to provide driving safety warnings to the driver based on the driving recommendation speed determined by the safe distance, information on obstacles ahead, map information and road surface smoothness information.

[0059] (2) During the driving process, the driver is given a driving safety warning based on the external environment, and the driver is given a basis for vehicle speed control, which can improve driving comfort, further ensure driving safety, and reduce driving safety accidents. Attached Figure Description

[0060] Figure 1 A flowchart of the driving safety warning method provided by the present invention;

[0061] Figure 2 This is an overall logic block diagram of the driving safety warning method provided by the present invention;

[0062] Figure 3 A flowchart of one embodiment of the driving safety warning method provided by the present invention;

[0063] Figure 4 This is a schematic diagram of the driving safety warning device provided by the present invention;

[0064] Figure 5 This is a structural schematic diagram of the vehicle provided by the present invention.

[0065] Among them, 10 is the data acquisition module; 20 is the safe distance determination module; 30 is the recommended speed determination module; and 40 is the safety warning module. Detailed Implementation

[0066] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0067] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0068] Figure 1 A flowchart of the driving safety warning method provided by the present invention; Figure 2 This is an overall logic block diagram of the driving safety warning method provided by the present invention; Figure 3 A flowchart of one embodiment of the driving safety warning method provided by the present invention; Figure 4 This is a schematic diagram of the driving safety warning device provided by the present invention; Figure 5 This is a structural schematic diagram of the vehicle provided by the present invention.

[0069] like Figure 1 As shown in the figure, this embodiment proposes a driving safety warning method, the method including:

[0070] Step 101: Obtain the vehicle's speed, information on obstacles ahead, map information, road surface smoothness information, and road surface cover information during the driving process;

[0071] Step 102: Determine the safe distance of the vehicle based on the driving speed and the road surface cover information;

[0072] Step 103: Based on the safe distance, the obstacle information ahead, the map information, and the road surface smoothness information, determine the recommended driving speed for this vehicle;

[0073] Step 104: Issue a driving safety warning based on the driving speed and the recommended driving speed.

[0074] The vehicle is equipped with a high-precision map, or can obtain high-precision map information from the cloud. Based on the route planned during navigation, it can anticipate curves and other features along the route, thus determining the radius of curvature of the curves. Road surface smoothness information includes at least one of the following: smooth road surface, road surface with potholes, and road surface with bumps. Road surface cover information includes at least one of the following: no road surface cover, road surface covered with water, road surface covered with ice, and road surface covered with snow.

[0075] Based on the vehicle's speed and road surface information, a safe distance is determined. Then, based on this safe distance, information about obstacles ahead, map data, and road surface smoothness, a recommended driving speed is determined. By comparing this recommended speed with the actual driving speed, a driving safety warning is provided to the driver, thereby improving driving comfort, further ensuring driving safety, and reducing the occurrence of traffic accidents. Furthermore, to minimize computational and storage overhead on the vehicle, all data required for the calculations is stored in the cloud and synchronized with the vehicle in real time.

[0076] In another implementation, after issuing a driving safety warning based on the driving speed and the recommended driving speed, if the actual driving speed of the vehicle continues to be greater than the recommended driving speed after a preset time interval, the vehicle controller of the vehicle will automatically control the vehicle to decelerate to the recommended driving speed.

[0077] Furthermore, based on the driving speed and the road surface cover information, a safe distance for the vehicle is determined, including:

[0078] Based on the road surface cover information, a preset friction coefficient between the vehicle and the road surface is determined through a preset correspondence relationship. The preset correspondence relationship is used to characterize the preset friction coefficient between the vehicle and the road surface corresponding to different road surface covers.

[0079] Based on the driving speed and the preset friction coefficient, the braking distance of the vehicle is determined;

[0080] Based on the braking distance, determine the safe distance for this vehicle.

[0081] Specifically, the preset correspondence can be a preset relationship table or a preset relationship curve. This is achieved by pre-acquiring friction coefficient data of the vehicle when driving on different road surfaces (such as dry roads, wet roads, snow-covered roads, and icy roads), and then analyzing and fitting the data to obtain the preset correspondence. Furthermore, when determining the vehicle's safe distance based on braking distance, a preset distance value can be directly added to the braking distance as the vehicle's safe distance. This preset distance value is determined by the vehicle's weight.

[0082] Furthermore, based on the driving speed and the road surface cover information, a safe distance for the vehicle is determined, including:

[0083] The safe distance for this vehicle is calculated using the following formula:

[0084]

[0085] Among them, S 安全 This is the safe distance for this vehicle; S 刹车 This is the braking distance of the vehicle; S 预设is a constant; V is the vehicle's speed; g is the gravitational acceleration; u is the preset friction coefficient; t is the driver's reaction time.

[0086] Furthermore, such as Figure 2 As shown, based on the safe distance, the information on obstacles ahead, the map information, and the road surface smoothness information, the recommended driving speed for this vehicle is determined, including:

[0087] Determine whether there is an obstacle in front of the vehicle within the safe distance. If there is an obstacle, determine the recommended driving speed based on the distance between the vehicle and the obstacle. If there is no obstacle, determine whether there is a pothole on the road surface in front of the vehicle within the safe distance.

[0088] If a pothole exists and its width is greater than a preset width, the recommended driving speed is determined based on the distance between the vehicle and the pothole. If no pothole exists, it is determined whether there is a bump on the road surface in front of the vehicle within the safe distance.

[0089] If a protrusion exists and its vertical height is greater than a preset height, the recommended driving speed is determined based on the distance between the vehicle and the protrusion. If no protrusion exists, it is determined whether there is a curve in the road ahead of the vehicle within the safe distance.

[0090] If there is a curve and the radius of curvature of the curve is greater than the preset radius of curvature, the recommended driving speed is determined based on the radius of curvature of the curve; if there is no curve, the current driving speed of the vehicle is determined as the recommended driving speed.

[0091] In this embodiment, obstacles can be people walking on the road, animals, objects placed on the road, or vehicles moving or parked on the road, which pose a certain safety risk when they collide with the vehicle. Potholes on the road surface can be pits, ditches, etc., which may cause significant vibration, chassis scraping, or tire jamming when a vehicle passes over them. Elevations on the road surface can be road ledges, etc. When these elevations have a certain vertical height, they may cause collisions, chassis scraping, or tire jamming when a vehicle passes over them. When a vehicle enters a curve, excessive speed can cause it to overturn, resulting in significant damage. Therefore, this solution uses a comprehensive judgment based on the above-mentioned multiple parameters to provide the driver with a safe and accurate optimal vehicle speed, giving the driver more time to think and make judgments, thus improving driving safety.

[0092] In another implementation, information about the road surface cover is collected using an onboard road surface roughness detection device, such as... Figure 3As shown, the system uses road surface roughness detection device to collect information on road surface cover and the current vehicle speed to calculate the distance required for braking (i.e., the vehicle's braking distance). Combined with a preset safety distance, it calculates the safe braking distance (i.e., the vehicle's safe distance). Simultaneously, it determines whether there is any danger ahead (i.e., if there is an obstacle and / or a pothole within the safe distance with a width greater than the preset width and / or a protrusion with a height greater than the preset height and / or a curve with a radius of curvature greater than the preset radius of curvature). Voice prompts are then given, and a suitable speed (i.e., the recommended driving speed) is calculated and displayed. After the driver receives the prompt, the vehicle speed is reduced to the suitable speed (i.e., the recommended driving speed), and the navigation is displayed normally (e.g., using green to display vehicle speed and navigation route information).

[0093] Further, the suggested driving speed is calculated based on the distance between the vehicle and the obstacle, determined based on the distance between the vehicle and the pothole, and determined based on the distance between the vehicle and the bump, including:

[0094] The recommended driving speed is calculated using the following formula:

[0095]

[0096] Among them, V 建议 Recommended driving speed; S 实际 denoted as , where is the distance between the vehicle and the obstacle, or the distance between the vehicle and the dent, or the distance between the vehicle and the protrusion; g is the acceleration due to gravity; and u is the preset coefficient of friction.

[0097] Further, determining the recommended driving speed based on the radius of curvature of the curve includes:

[0098] The recommended driving speed is calculated using the following formula:

[0099]

[0100] Among them, V 建议 ε is the suggested driving speed; g is the correction coefficient; u is the gravitational acceleration; R is the radius of curvature of the curve.

[0101] Furthermore, the driving safety warning based on the driving speed and the recommended driving speed includes:

[0102] If the driving speed is greater than the recommended driving speed, the recommended driving speed will be displayed and announced via voice.

[0103] Specifically, when the driving speed is lower than the recommended driving speed, it indicates that the vehicle's current speed meets the set requirements. Even when facing dangerous factors such as obstacles, rear-end collisions, sharp bends, and ditches, the driver has a longer reaction time, and the probability of the vehicle causing danger is relatively low, thus ensuring high safety. Therefore, no reminder is needed to the driver. In this embodiment, the methods for reminding the driver include: displaying the recommended driving speed on the central control screen and providing a voice announcement of the recommended driving speed. For example, a voice announcement might say: "The vehicle speed exceeds the optimal driving speed. Please reduce your speed to below the recommended driving speed." Simultaneously, the recommended driving speed is displayed in red on the central control screen, as red is more conspicuous and provides a better reminder effect.

[0104] Furthermore, the method also includes providing voice safety reminders in one or more of the following situations:

[0105] There is an obstacle in front of the vehicle within the specified safe distance;

[0106] There is a pit within the safe distance, and the width of the pit is greater than the preset width;

[0107] There is a protrusion within the safe distance, and the vertical height of the protrusion is greater than the preset height;

[0108] There is a curve within the safe distance, and the radius of curvature of the curve is greater than the preset radius of curvature.

[0109] Specifically, in this embodiment, if there is an obstacle in front of the vehicle within a safe distance, a warning will be issued: "There is a collision risk ahead, and it is recommended to reduce the vehicle speed to xx km / h." Simultaneously, the road ahead and the recommended driving speed will be displayed in red on the central control screen. If there is a pothole in front of the vehicle within the safe distance, and the width of the pothole is greater than a preset width, a warning will be issued: "There is a risk of getting stuck ahead, and it is recommended to reduce the vehicle speed to xx km / h." Simultaneously, the road ahead and the recommended driving speed will be displayed in red on the central control screen. If there is a protrusion in front of the vehicle within the safe distance, and the height of the protrusion is greater than a preset height, a warning will be issued: "There is a risk of hitting the vehicle ahead, and it is recommended to reduce the vehicle speed to xx km / h." Simultaneously, the road ahead and the recommended driving speed will be displayed in red on the central control screen. If there is a curve in front of the vehicle within the safe distance, and the radius of curvature of the curve is greater than a preset radius of curvature, a warning will be issued: "There is a risk of rollover ahead, and it is recommended to reduce the vehicle speed to xx km / h." Simultaneously, the road ahead and the recommended driving speed will be displayed in red on the central control screen. When the driver reduces the vehicle speed below the recommended driving speed, the road ahead and recommended driving speed displayed on the central control screen will return to green. When multiple hazards occur simultaneously, the system will alert the driver to the first hazard that appears.

[0110] In another implementation, the driving safety warning to the driver is provided through a combination of the vehicle's central control screen and voice prompts. When there are no hazards ahead, the safe distance to the vehicle is displayed only on the central control screen. When the road surface is slippery, the central control screen recommends the current optimal driving speed. When hazards appear ahead, a voice prompt indicates a collision risk or bumpy road ahead, suggesting that the vehicle speed be reduced to xx km / h, and the road ahead is displayed in red on the central control screen. When the driver reduces the speed to an appropriate level, the road ahead returns to green.

[0111] like Figure 4 As shown, this embodiment also proposes a driving safety warning device, the device comprising:

[0112] The data acquisition module 10 is used to acquire the vehicle's driving speed, information on obstacles ahead, map information, road surface smoothness information, and road surface cover information during the driving process.

[0113] The safe distance determination module 20 is used to determine the safe distance of the vehicle based on the driving speed and the road surface cover information;

[0114] The recommended speed determination module 30 is used to determine the recommended driving speed of the vehicle based on the safe distance, the obstacle information ahead, the map information and the road surface smoothness information;

[0115] The safety warning module 40 is used to provide driving safety warnings based on the driving speed and the recommended driving speed.

[0116] This embodiment also proposes a machine-readable storage medium storing instructions that cause the machine to execute the above-described driving safety warning method.

[0117] like Figure 5 As shown, this embodiment also proposes a vehicle that includes the aforementioned driving safety warning device.

[0118] In this embodiment, a road roughness detection device installed on the vehicle is used to collect information on road surface coverings. The road roughness detection device is installed under the front of the vehicle or on the roof. Specifically, it can be a radar or laser infrared sensor. By emitting detection signals to the road surface, the specific conditions of the road surface coverings are determined based on the received signals, such as water accumulation, ice, snow accumulation, etc.

[0119] In this embodiment, a forward road condition detection device is used to collect information on obstacles ahead and road surface smoothness. This device can be a radar or a ranging sensor. It is installed at a downward angle to detect not only horizontal obstacles to prevent collisions, but also road hazards such as potholes, ditches, and sharp turns, preventing vehicles from getting stuck or falling off cliffs. Furthermore, it alerts the driver to factors causing vehicle bumps, such as road subsidence, potholes, and speed bumps, improving driving comfort. The tilt angle of the forward road condition detection device can also be adjusted according to road conditions. When the road is slippery, the device will be raised to a suitable position, ensuring that the distance between the device's furthest observation point and the vehicle body remains consistent with the required braking distance.

[0120] The above embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention.

[0121] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application.

Claims

1. A driving safety warning method, characterized in that, The method includes: Acquire information on the vehicle's speed, obstacles ahead, map data, road surface smoothness, and road cover during its operation; Based on the driving speed and the road surface cover information, determine the safe distance of the vehicle; Based on the safe distance, the information on obstacles ahead, the map information, and the road surface smoothness information, the recommended driving speed for this vehicle is determined; Driving safety warnings are issued based on the driving speed and the recommended driving speed. The road surface smoothness information includes at least one of the following: the road surface is smooth, the road surface has potholes, and the road surface has bumps; Based on the safe distance, the information on obstacles ahead, the map information, and the road surface smoothness information, the recommended driving speed for this vehicle is determined, including: Determine whether there is an obstacle in front of the vehicle within the safe distance. If there is an obstacle, determine the recommended driving speed based on the distance between the vehicle and the obstacle. If there is no obstacle, determine whether there is a pothole on the road surface in front of the vehicle within the safe distance. If a pothole exists and its width is greater than a preset width, the recommended driving speed is determined based on the distance between the vehicle and the pothole. If no pothole exists, it is determined whether there is a bump on the road surface in front of the vehicle within the safe distance. If a protrusion exists and its vertical height is greater than a preset height, the recommended driving speed is determined based on the distance between the vehicle and the protrusion. If no protrusion exists, it is determined whether there is a curve in the road ahead of the vehicle within the safe distance. If there is a curve and the radius of curvature of the curve is greater than the preset radius of curvature, the recommended driving speed is determined based on the radius of curvature of the curve; if there is no curve, the current driving speed of the vehicle is determined as the recommended driving speed.

2. The driving safety early warning method according to claim 1, characterized in that, The road surface covering information includes at least one of the following: no road surface covering, road surface covering is water accumulation, road surface covering is ice, and road surface covering is snow. Based on the driving speed and the road surface cover information, a safe distance for the vehicle is determined, including: Based on the road surface cover information, a preset friction coefficient between the vehicle and the road surface is determined through a preset correspondence relationship. The preset correspondence relationship represents the preset friction coefficient between the vehicle and the road surface corresponding to different road surface covers. Based on the driving speed and the preset friction coefficient, the braking distance of the vehicle is determined; Based on the braking distance, determine the safe distance for this vehicle.

3. The driving safety early warning method according to claim 1, characterized in that, Based on the driving speed and the road surface cover information, a safe distance for the vehicle is determined, including: The safe distance for this vehicle is calculated using the following formula: ； in, This is the safe distance for this vehicle; This is the braking distance of the vehicle. It is a constant; This is the vehicle's speed; It is the acceleration due to gravity; The preset friction coefficient; This refers to the driver's reaction time.

4. The driving safety early warning method according to claim 1, characterized in that, The recommended driving speed is calculated based on the distance between the vehicle and the obstacle, determined based on the distance between the vehicle and the pothole, and determined based on the distance between the vehicle and the bump, including: The recommended driving speed is calculated using the following formula: ； in, Recommended driving speed; This refers to the distance between the vehicle and an obstacle, or the distance between the vehicle and a dent, or the distance between the vehicle and a protrusion. It is the acceleration due to gravity; The preset friction coefficient.

5. The driving safety early warning method according to claim 1, characterized in that, Determining the recommended driving speed based on the radius of curvature of the curve includes: The recommended driving speed is calculated using the following formula: ； in, Recommended driving speed; This is a correction factor; It is the acceleration due to gravity; The preset friction coefficient; Let be the radius of curvature of the curve.

6. The driving safety early warning method according to claim 1, characterized in that, Driving safety warnings based on the driving speed and the recommended driving speed include: If the driving speed is greater than the recommended driving speed, the recommended driving speed will be displayed and announced via voice. The method further includes providing voice safety reminders in one or more of the following situations: There is an obstacle in front of the vehicle within the specified safe distance; There is a pit within the safe distance, and the width of the pit is greater than the preset width; There is a protrusion within the safe distance, and the vertical height of the protrusion is greater than the preset height; There is a curve within the safe distance, and the radius of curvature of the curve is greater than the preset radius of curvature.

7. A driving safety warning device, characterized in that, The device includes: The data acquisition module is used to acquire the vehicle's speed, information on obstacles ahead, map information, road surface smoothness information, and road surface cover information during the driving process. The safe distance determination module is used to determine the safe distance of the vehicle based on the driving speed and the road surface cover information; The recommended speed determination module is used to determine the recommended driving speed of the vehicle based on the safe distance, the obstacle information ahead, the map information, and the road surface smoothness information. The safety warning module is used to provide driving safety warnings based on the driving speed and the recommended driving speed. The road surface smoothness information includes at least one of the following: the road surface is smooth, the road surface has potholes, and the road surface has bumps; Based on the safe distance, the information on obstacles ahead, the map information, and the road surface smoothness information, the recommended driving speed for this vehicle is determined, including: Determine whether there is an obstacle in front of the vehicle within the safe distance. If there is an obstacle, determine the recommended driving speed based on the distance between the vehicle and the obstacle. If there is no obstacle, determine whether there is a pothole on the road surface in front of the vehicle within the safe distance. If a pothole exists and its width is greater than a preset width, the recommended driving speed is determined based on the distance between the vehicle and the pothole. If no pothole exists, it is determined whether there is a bump on the road surface in front of the vehicle within the safe distance. If a protrusion exists and its vertical height is greater than a preset height, the recommended driving speed is determined based on the distance between the vehicle and the protrusion. If no protrusion exists, it is determined whether there is a curve in the road ahead of the vehicle within the safe distance. If there is a curve and the radius of curvature of the curve is greater than the preset radius of curvature, the recommended driving speed is determined based on the radius of curvature of the curve; if there is no curve, the current driving speed of the vehicle is determined as the recommended driving speed.

8. A machine-readable storage medium, characterized in that, The machine-readable storage medium stores instructions for causing the machine to perform the driving safety warning method according to any one of claims 1-6.

9. A vehicle, characterized in that, Includes the driving safety warning device as described in claim 7.

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