Vehicle safety distance warning method and device and electronic equipment

Abstract

The invention relates to the field of vehicle safety early warning, in particular to a vehicle safety distance warning method and device and electronic equipment. The vehicle safety distance warning method comprises the steps that a safety distance reference value is determined according to the speed of a vehicle; determining a driving scene according to at least one of vehicle types of vehicles in front of and behind the vehicle, a road section where the vehicle is located and weather conditions; determining a safe distance adjustment coefficient according to the driving scene; determining a safe vehicle distance according to the safe distance reference value and the safe distance adjustment coefficient; under the condition that the current vehicle distance is smaller than or equal to an early warning threshold value, warning information is sent out; the early warning threshold value is the safe vehicle distance with a preset proportion. According to the method, the safe vehicle distance can be determined in a self-adaptive mode, the obtained safe vehicle distance is more scientific, a driver is effectively prompted through the projection lamp, the HUD and the voice, and safety is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle safety warning, and more specifically, to a vehicle safety distance warning method, device and electronic equipment. Background Art

[0002] With the continuous development of automobile technology and increasingly fierce competition, consumers have higher and higher demands for vehicle safety. Keeping a safe distance from the front and rear vehicles is an important means to improve driving safety. The current methods of maintaining a safe distance have the following defects: 1. When the distance to the following vehicle is too close, the driver is often reminded by icons, prompt sounds, etc. These solutions are not intuitive enough and sometimes fail to attract the driver's attention; 2. The current solution lacks an adaptive reminder system that determines different safe distances according to vehicle speed; 3. When the following vehicle is too close, the current solution cannot remind the following vehicle to pay attention to the safe distance, and the vehicle cannot reduce the risk of being rear-ended; 4. There is a lack of necessary methods to maintain a larger safe distance when the road surface is slippery, such as rainy days and icy roads; 5. There is a lack of necessary methods to maintain a larger safe distance from large trucks behind; 6. There is a lack of necessary methods to maintain a larger safe distance on long downhill slopes.

[0003] In view of this, this application is hereby filed. Summary of the invention

[0004] The purpose of the present application is to provide a vehicle safety distance warning method, device and electronic equipment to solve the problem that the prior art lacks safety distance warning based on factors such as vehicle speed, weather, vehicle type, etc. and cannot effectively remind the driver in multiple ways.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions: In a first aspect, the present application provides a vehicle safety distance warning method, comprising: Determine the safety distance reference value according to the vehicle speed; Determine the driving scenario based on at least one of the vehicle types of the vehicles in front of and behind the vehicle, the road section where the vehicle is located, and the weather conditions; Determining a safety distance adjustment coefficient according to the driving scenario; Determining a safe vehicle distance according to the safety distance reference value and the safety distance adjustment coefficient; When the current vehicle distance is less than or equal to the warning threshold, a warning message is issued; the warning threshold is a preset proportion of the safe vehicle distance.

[0006] As a further preferred technical solution, the driving scenario includes at least one standard scenario, each standard scenario corresponds to a safety distance adjustment coefficient, and the safety distance adjustment coefficients of all standard scenarios are all equal, all unequal, or partially equal.

[0007] As a further preferred technical solution, when the driving scenario includes multiple standard scenarios, the safety distance adjustment coefficient of the driving scenario is determined according to the maximum value of the safety distance adjustment coefficients corresponding to the multiple standard scenarios.

[0008] As a further preferred technical solution, standard scenarios include the presence of heavy trucks in front and behind the vehicle, driving in bad weather, and driving on a long downhill slope.

[0009] As a further preferred technical solution, the issuing of warning information includes: controlling the projection light to project first safe vehicle distance prompt information onto the road surface according to the width of the vehicle, the height of the projection light, the distance between the left and right ends of the projection light and the safe vehicle distance.

[0010] As a further preferred technical solution, the controlling the projection lamp to project the first safe vehicle distance prompt information onto the road surface according to the width of the vehicle, the height of the projection lamp, the distance between the left and right ends of the projection lamp and the safe vehicle distance comprises: Determining a first emission angle of the projection light according to the height of the projection light and the safe vehicle distance; Determining a second emission angle of the projection light according to the width of the vehicle, the distance between the left and right ends of the projection light, and the safe vehicle distance; According to the first emission angle of the projection light and the second emission angle of the projection light, the projection lamp is controlled to project first safe vehicle distance prompt information onto the road surface; the first safe vehicle distance prompt information includes a vehicle distance line and the safe vehicle distance.

[0011] As a further preferred technical solution, the issuing of warning information includes: controlling the HUD to display a safe distance between the vehicle and the vehicle in front.

[0012] As a further preferred technical solution, the warning information includes: playing a prompt voice to keep a safe distance, and playing a prompt voice of the type of vehicles behind and behind the vehicle when the vehicle type is a heavy truck, playing a prompt voice of the section of the road where the vehicle is located when the road section where the vehicle is located is a long downhill section, and playing a prompt voice of the weather conditions when the weather conditions are rainy, snowy or foggy.

[0013] In a second aspect, the present application provides a vehicle safety distance warning device, comprising: A safety distance reference value determination module is used to determine a safety distance reference value according to the vehicle speed; A driving scene determination module, used to determine the driving scene according to at least one of the vehicle types of the vehicles in front and behind the vehicle, the road section where the vehicle is located, and the weather conditions; A safety distance adjustment coefficient determination module, used to determine the safety distance adjustment coefficient according to the driving scenario; A safe vehicle distance determination module, used to determine the safe vehicle distance according to the safe distance reference value and the safe distance adjustment coefficient; The warning module is used to issue a warning message when the current vehicle distance is less than or equal to a warning threshold; the warning threshold is a preset proportion of the safe vehicle distance.

[0014] In a third aspect, the present application provides an electronic device, including: at least one processor, and a memory communicatively coupled to at least one of the processors; The memory stores instructions that can be executed by at least one of the processors, and the instructions are executed by at least one of the processors so that at least one of the processors can perform the above method.

[0015] Compared with the prior art, the beneficial effects of this application are: The vehicle safety distance warning method provided by the present application determines the safety distance reference value according to the speed of the vehicle; determines the driving scene according to at least one of the vehicle type of the vehicle in front and behind the vehicle, the road section where the vehicle is located, and the weather conditions; determines the safety distance adjustment coefficient according to the driving scene; determines the safety distance according to the safety distance reference value and the safety distance adjustment coefficient; issues a warning message when the current vehicle distance is less than or equal to the warning threshold; the warning threshold is a preset proportion of the safety distance. The method can adaptively determine the safety distance by combining multiple factors such as the speed of the vehicle, the vehicle type of the vehicle in front and behind the vehicle, the road section where the vehicle is located, and the weather conditions. The obtained safety distance is more scientific, and issues a warning message when the current vehicle distance is less than or equal to the warning threshold, so as to at least remind the driver to pay attention to the vehicle distance and ensure driving safety.

[0016] Furthermore, the present application also issues warnings in the form of projection lights, HUD or voice, providing the driver with a more comprehensive perception of the surrounding environment, especially at night or in conditions of low visibility, which can help the driver better judge driving safety. The projection lights can be controlled to project the first safe distance prompt information onto the road surface, which can remind the driver of the following vehicle to pay attention to the safe distance and reduce the possibility of the vehicle being rear-ended due to the mistake of the following vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1It is a flow chart of a vehicle safety distance warning method provided by the present application; Figure 2 is a schematic diagram of the first emission angle of the projection light in this application; Figure 3 is a schematic diagram of the second emission angle of the projection light in this application; Figure 4 It is a structural schematic diagram of the vehicle safety distance warning device provided by the present application; Figure 5 It is a structural schematic diagram of the electronic device provided by this application. DETAILED DESCRIPTION

[0019] The following is a description of exemplary embodiments of the present application in conjunction with the accompanying drawings, including various details of the embodiments of the present application to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. Similarly, for the sake of clarity and conciseness, the description of well-known functions and structures is omitted in the following description.

[0020] As mentioned in the background technology, the existing technology lacks safe distance warning based on factors such as vehicle speed, weather, and vehicle type, and cannot effectively remind the driver in multiple ways. In this regard, the present application determines the safe distance based on the vehicle speed, the vehicle type of the vehicle in front and behind the vehicle, the road section where the vehicle is located, and the weather conditions. When the current vehicle distance is less than or equal to the warning threshold, a warning message is issued to scientifically and effectively remind the driver and improve driving safety. The present application is further described in detail below in conjunction with the embodiments.

[0021] Example 1 Figure 1 This is a flow chart of a vehicle safety distance warning method provided by this embodiment. This embodiment is applicable to vehicle safety distance warning during vehicle driving. This method can be executed by a vehicle safety distance warning device, which can be composed of software and / or hardware and is generally integrated in an electronic device, which can be a vehicle controller or an electronic control unit. For ease of understanding, each step in the method of this embodiment is performed by the electronic control unit.

[0022] like Figure 1 As shown, this embodiment provides a vehicle safety distance warning method, comprising the following steps: S110: Determine a safety distance reference value according to the vehicle speed.

[0023] The "vehicle speed" can be obtained by collecting the vehicle speed data on the CAN line of the vehicle. The vehicle refers to the vehicle that executes the vehicle safety distance warning method. The "safety distance benchmark value" is the benchmark value of the safety distance.

[0024] Optionally, the mapping relationship between the vehicle speed and the safety distance reference value can be obtained, and then the safety distance reference value can be determined according to the mapping relationship and the vehicle speed. The mapping relationship can be designed based on road regulations. Table 1 is an example of the mapping relationship.

[0025] Table 1

[0026] S120: Determine a driving scenario based on at least one of vehicle types of vehicles in front of and behind the vehicle, a road section where the vehicle is located, and weather conditions.

[0027] The vehicle type of the vehicle in front and behind the vehicle, the road section and weather conditions of the vehicle have a significant impact on more accurately determining the safe distance. For example, for cars and heavy trucks, under the same vehicle speed, weather conditions and other conditions, the braking distance of heavy trucks is longer than that of cars, and the corresponding safe distance of heavy trucks is also larger than that of cars. For another example, for flat road sections and downhill sections, under the same vehicle speed, weather conditions and other conditions, the braking distance of downhill sections is longer than that of flat road sections, and the corresponding safe distance of downhill sections is also larger than that of flat road sections. Therefore, the present application determines the driving scene according to at least one of the vehicle type of the vehicle in front and behind the vehicle, the road section and weather conditions of the vehicle, and then determines the safe distance based on factors such as the driving scene, and associates the safe distance with the driving scene, so that the obtained safe distance is more reliable.

[0028] Optionally, the driving scenario can be determined according to the vehicle type of the vehicles ahead and behind the vehicle, the driving scenario can be determined according to the road section the vehicle is located in, the driving scenario can be determined according to the weather conditions, the driving scenario can be determined according to the vehicle type of the vehicles ahead and behind the vehicle and the road section the vehicle is located in, the driving scenario can be determined according to the vehicle type of the vehicles ahead and behind the vehicle and the weather conditions, the driving scenario can be determined according to the road section the vehicle is located in and the weather conditions, or the driving scenario can be determined according to the vehicle type of the vehicles ahead and behind the vehicle, the road section the vehicle is located in and the weather conditions, etc.

[0029] In an optional implementation, the driving scenario includes at least one standard scenario, each standard scenario corresponds to a safety distance adjustment coefficient, and the safety distance adjustment coefficients of all standard scenarios are all equal, all unequal, or partially equal.

[0030] "Safety distance adjustment coefficient" refers to the coefficient used to adjust the safety distance in conjunction with the above safety distance reference value. After obtaining the safety distance adjustment coefficient, the safety distance can be further combined with the safety distance reference value and the driving scenario to obtain the safety distance. "Standard scenario" refers to the scenario where there is a warning lag when using the safety distance reference value for warning.

[0031] The safety distance adjustment coefficients of all standard scenarios are all equal, all unequal, or partially equal. For example, when the standard scenarios include heavy trucks in front and behind the vehicle, driving in bad weather, and long downhill driving, the safety distance adjustment coefficient for the standard scenario of heavy trucks in front and behind the vehicle is 3, the safety distance adjustment coefficient for the standard scenario of driving in bad weather is 2, and the safety distance adjustment coefficient for the standard scenario of long downhill driving is 2.

[0032] In an optional implementation, when the driving scenario includes multiple standard scenarios, the safety distance adjustment coefficient of the driving scenario is determined according to the maximum value of the safety distance adjustment coefficients corresponding to the multiple standard scenarios.

[0033] For example, when the driving scenarios include the three standard scenarios of heavy trucks in front and behind the vehicle, driving in bad weather, and long downhill driving, the maximum value of the safety distance adjustment coefficients corresponding to the three standard scenarios can be used as the safety distance adjustment coefficient for the driving scenario. For example, when there are heavy trucks in front and behind the vehicle, driving in bad weather, and long downhill driving, the safety distance adjustment coefficient is 3.

[0034] In an optional implementation, the standard scenarios include the presence of heavy trucks in front of and behind the vehicle, driving in bad weather, and driving on a long downhill slope.

[0035] Among them, "bad weather driving" means that the vehicle is currently driving in snowy, foggy, snowy and other weather conditions.

[0036] The standard scenario of heavy trucks in front and behind the vehicle can be obtained based on the images of the vehicles in front and behind the vehicle, which can be obtained by using the camera set in front of the vehicle and the camera set in the rear of the vehicle respectively. The front and rear vehicles refer to the front vehicle closest to the vehicle and the rear vehicle closest to the vehicle, that is, if multiple vehicles are collected, the closest to the vehicle shall prevail. The standard scenario of driving in bad weather can be determined based on the weather forecast and the data of the rain sensor equipped on the vehicle. The rain sensor can be set on the roof, and a capacitive rain sensor can be used, and the sensor and the connecting wire must have good waterproofness to prevent damage due to exposure to the external environment. The weather forecast can be obtained from the meteorological service platform, and the data is updated in real time through the Internet of Vehicles. The weather forecast includes cloudy, sunny, rainy, snowy, temperature, humidity, wind force, wind direction, etc. The standard scenario of long downhill driving can be obtained by analyzing the images of warning signs located on the vehicle road or on both sides of the road during driving. Common road warning signs include four categories: prohibition sign warning signs, warning sign warning signs, direction sign warning signs, and guide sign warning signs. Direction warning signs include long downhill warning signs, continuous bend warning signs, sharp left turn warning signs, etc.

[0037] Optionally, the vehicle images in front and behind the vehicle may be input into a vehicle classification model to output the vehicle types of the vehicles in front and behind the vehicle; The road warning sign image is input into the warning sign classification model, and the warning sign type is output; based on the warning sign type, the road section where the vehicle is located is determined.

[0038] This embodiment provides a specific method for determining the vehicle type of the vehicle in front and behind the vehicle and the road section where the vehicle is located, which is mainly implemented by a vehicle classification model and a warning sign classification model. Among them, the "vehicle classification model" refers to a model that can identify the type of vehicle from an image containing a vehicle. Common vehicle types include but are not limited to sedans, SUVs, MPVs, sports cars, pickup trucks, light trucks, heavy trucks, passenger cars, buses, etc. This classification model can use a deep learning network model. The "warning sign classification model" refers to a model that can identify the type of warning sign from an image containing a road warning sign. This classification model can also use a deep learning network model.

[0039] S130. Determine a safety distance adjustment coefficient according to the driving scenario.

[0040] As can be seen from the foregoing, the reliability of the safety distance reference value obtained only from the vehicle speed is slightly weak. Under certain special driving conditions, the above safety distance reference value needs to be further increased to ensure driving safety.

[0041] In addition to at least one standard scenario, the driving scenario may also include non-standard scenarios, such as no heavy trucks in front or behind the vehicle, no bad weather, and no long downhill driving. Therefore, the safety distance adjustment factor needs to be determined according to the specific conditions of the driving scenario.

[0042] Optionally, when all driving scenes are non-standard scenes, the safety distance adjustment coefficient is determined to be 1; when the driving scenes only include one standard scene, the safety distance adjustment coefficient is determined to be the safety distance adjustment coefficient corresponding to the standard scene; when the driving scenes include at least two standard scenes, the safety distance adjustment coefficient is determined to be the maximum value of the safety distance adjustment coefficients corresponding to the two standard scenes.

[0043] S140: Determine a safe vehicle distance according to the safety distance reference value and the safety distance adjustment coefficient.

[0044] In some examples, the vehicle speed is 100km / h, and the safety distance reference value obtained from Table 1 is 100m. If the driving scenario at this time is that there are heavy trucks in front and behind the vehicle, the safety distance adjustment factor is 3, and the safe distance is 3×100=300m. If the driving scenario at this time is a long downhill driving, the safety distance adjustment factor is 2, and the safe distance is 2×100=200m. If the driving scenario at this time is driving in bad weather, the safety distance adjustment factor is 2, and the safe distance is 2×100=200m. If the driving scenario at this time is that there are heavy trucks in front and behind the vehicle and a long downhill driving, the safety distance adjustment factor is 3, and the safe distance is 3×100=300m.

[0045] S150: When the current vehicle distance is less than or equal to a warning threshold, a warning message is issued; the warning threshold is a preset ratio of the safe vehicle distance.

[0046] “Current vehicle distance” refers to the distance between the vehicle in front or behind at the current moment. The current vehicle distance can be calculated using a laser ranging radar. The effective working distance of a laser ranging radar can cover 100 meters. The calculation steps of the current vehicle distance are as follows: (1) Emitting laser pulses: The radar system emits laser pulses. These pulses travel at the speed of light (approximately 3×10 8(2) Record the emission and reception time: When the laser emits a laser pulse, the timer records the emission time T1; when the receiver receives the reflected laser, the timer records the reception time T2. (3) Calculate the flight time: The interval ΔT between T1 and T2 is the "flight time" of the laser. (4) Calculate the distance: According to the formula R=(c·ΔT) / 2, the one-way distance R from the radar to the target can be calculated, where c represents the speed of light. Two laser ranging radars can be optionally set up, one at the front and one at the rear of the vehicle, and work in conjunction with the corresponding settings of the front and rear cameras of the vehicle. The laser ranging radars at the corresponding positions are turned on only when the front and rear cameras recognize the vehicle.

[0047] "Warning threshold" refers to the minimum value used for safe vehicle distance warning. The warning threshold is a preset ratio of the safe vehicle distance. In order to improve the timeliness of the warning, it is generally necessary to issue a warning when the current vehicle distance is about to be less than the safe vehicle distance. Therefore, the above preset ratio is greater than 1, and 1.05~1.1 can be selected. For example, the safe vehicle distance is 100m, the preset ratio is 1.05, and the warning threshold is 105m.

[0048] In an optional embodiment, the issuing of the warning information includes: controlling the projection lamp to project the first safe vehicle distance prompt information onto the road surface according to the width of the vehicle, the height of the projection lamp, the distance between the left and right ends of the projection lamp and the safe vehicle distance.

[0049] "Projector lamp" refers to a device installed at the front and rear of the vehicle that can project light. DLP (Digital Light Processing) projection device is optional. DLP projection device includes a converging lens, a three-color light source, a color wheel, a trimming lens and a DMD (Digital Micromirror Device) lens. The light emitted by the LED light source in the DLP projection device is uniformed by a converging lens, and then the processed light passes through the color wheel to separate the light into three colors RGB (red (R), green (G), blue (B)), or RGBW (red (R), green (G), blue (B), white (W)) and more colors. The color is then irradiated onto the DMD chip through the trimming lens, where the DMD chip is a mirror encapsulated in a closed space composed of metal and glass. The DMD chip is composed of hundreds of thousands or even millions of micromirrors. One micromirror represents one pixel, and the change rate is 1000 times / second or faster to control whether the light passes through. The DMD chip is controlled by the corresponding DLP circuit board to control the pixel switch state. Finally, the light is irradiated onto the road, forming the desired projection content.

[0050] In an optional implementation, controlling the projection lamp to project the first safe vehicle distance prompt information onto the road surface according to the width of the vehicle, the height of the projection lamp, the distance between the left and right ends of the projection lamp, and the safe vehicle distance includes: Determining a first emission angle of the projection light according to the height of the projection light and the safe vehicle distance; Determining a second emission angle of the projection light according to the width of the vehicle, the distance between the left and right ends of the projection light, and the safe vehicle distance; According to the first emission angle of the projection light and the second emission angle of the projection light, the projection lamp is controlled to project first safe vehicle distance prompt information onto the road surface; the first safe vehicle distance prompt information includes a vehicle distance line and the safe vehicle distance.

[0051] The present embodiment does not impose any special restrictions on the specific form, installation position and number of the projection lamps, as long as the desired projection effect can be achieved. It is understandable that in order to achieve the projection of the front and rear roads of the vehicle, at least two projection lamps should be set, that is, respectively set at the front and rear of the vehicle. Optionally, two projection lamps are set at the front and rear of the vehicle respectively. The above-mentioned "projection lamp height" refers to the height of the projection lamp from the ground. "The distance between the left and right ends of the projection lamp" refers to the distance between the leftmost and rightmost ends of the projection lamp located at the front of the vehicle, or the distance between the leftmost and rightmost ends of the projection lamp located at the rear of the vehicle. It should be noted that the above-mentioned leftmost and rightmost ends do not refer to the leftmost and rightmost ends of a projection lamp, but the leftmost and rightmost ends formed by all the projection lamps at the front of the vehicle, or the leftmost and rightmost ends formed by all the projection lamps at the rear of the vehicle. For example, when there are two left and right projection lamps at the front of the vehicle, the above-mentioned distance is the distance between the leftmost end of the left projection lamp and the rightmost end of the right projection lamp. "The first emission angle of the projection light" refers to the up and down angle when the projection light is emitted. The "second emission angle of the projected light" refers to the left and right angle of the projected light when it is emitted. The "distance line" appears as a light strip. If other vehicles do not appear in the range between the vehicle and the distance line, it means that the distance is safe. If other vehicles appear in the range, it means that the vehicle needs to take measures (such as adjusting the speed, etc.) to increase the distance. The safe distance can be displayed in front of the distance line for a clearer display.

[0052] In this embodiment, the projection light can be projected at a safe distance from the vehicle by determining the first emission angle of the projection light, and the width of the projection light can be kept the same as the width of the vehicle by determining the second emission angle of the projection light, thereby making the visualization effect of the first safe distance prompt information better.

[0053] Alternatively, if Figure 2 As shown, the first emission angle α of the projection light is calculated by the following formula: α=arctan(L / h), where L is the safe vehicle distance and h is the height of the projection light. Figure 3As shown, the second emission angle β of the above-mentioned projection light is calculated using the following formula: , where W is the width of the vehicle, w is the distance between the left and right ends of the projection light, and L is the safe vehicle distance.

[0054] Optionally, the left and right angles of the actual projection light emission may be smaller than the second projection light emission angle. To make the light more obvious, the light source near the light band can be turned off by adjusting the DMD chip during projection to make it darker. At the same time, in order not to affect the driver's sight, the darkened area cannot be too wide.

[0055] In an optional implementation, issuing a warning message includes: controlling the HUD to display a safe distance between the vehicle and the vehicle in front.

[0056] "HUD" is a Head Up Display, and the driver can see the content displayed by the HUD without lowering his head. In this embodiment, the HUD is controlled to display the safe distance between the vehicle and the vehicle in front, and the safe distance between the vehicle and the vehicle behind can be displayed or not.

[0057] In an optional embodiment, the warning information includes: playing a voice prompt to keep a safe distance, playing a voice prompt of the type of vehicles behind and behind the vehicle when the vehicle type is a heavy truck, playing a voice prompt of the section of the road where the vehicle is located when the road section where the vehicle is located is a long downhill section, and playing a voice prompt of the weather conditions when the weather conditions are rainy, snowy or foggy.

[0058] There are many different prompt voices depending on the vehicle's driving conditions. Among them, the prompt voice for keeping a safe distance must be played (such as "Please pay attention to keep a safe distance"). If heavy trucks appear in front and behind the vehicle at the same time, the vehicle type promotion voice must be played (such as "Large truck approaching from behind"). If the vehicle is on a long downhill section at the same time, the prompt voice of the section where the vehicle is located must be played (such as "Long downhill ahead"). If the weather conditions are rainy, snowy and foggy at the same time, the prompt voice of the weather conditions must be played (such as "The road is slippery in rainy days") to remind the driver to pay attention to these special conditions. The further added prompt voices under the above special conditions can be played in combination with the prompt voice for keeping a safe distance, such as "The road is slippery in rainy days, please pay attention to keep a safe distance."

[0059] In various implementations of S150, only when the current vehicle distance is less than or equal to the warning threshold value, the projection lamp is controlled to project the first safe vehicle distance prompt information onto the road surface, and the HUD is controlled to display the safe vehicle distance between the vehicle and the vehicle in front. Compared with the method of always projecting or displaying prompt information, it can avoid disturbing itself and surrounding vehicles, making the HUD interface simpler and the prompt effect better.

[0060] The above-mentioned vehicle safe distance warning method adaptively determines the safe distance based on multiple factors such as the vehicle speed, the vehicle type of the vehicles in front and behind the vehicle, the road section where the vehicle is located, weather conditions, etc. The obtained safe distance is more scientific, and when the current distance is less than or equal to the warning threshold, a warning message is issued to at least remind the driver to pay attention to the distance and ensure driving safety.

[0061] Furthermore, the present application also issues warnings in the form of projection lights, HUD or voice, providing the driver with a more comprehensive perception of the surrounding environment, especially at night or in conditions of low visibility, which can help the driver better judge driving safety. The projection lights can be controlled to project the first safe distance prompt information onto the road surface, which can remind the driver of the following vehicle to pay attention to the safe distance and reduce the possibility of the vehicle being rear-ended due to the mistake of the following vehicle.

[0062] Example 2 like Figure 4 As shown, this embodiment provides a vehicle safety distance warning device, including: A safety distance reference value determination module 201 is used to determine a safety distance reference value according to the vehicle speed; A driving scene determination module 202, for determining a driving scene according to at least one of the vehicle types of vehicles in front of and behind the vehicle, the road section where the vehicle is located, and weather conditions; A safety distance adjustment coefficient determination module 203, used to determine a safety distance adjustment coefficient according to the driving scenario; A safe vehicle distance determination module 204, configured to determine a safe vehicle distance according to the safety distance reference value and the safety distance adjustment coefficient; The warning module 205 is used to issue a warning message when the current vehicle distance is less than or equal to a warning threshold; the warning threshold is a preset ratio of the safe vehicle distance.

[0063] The device is used to execute the above method, and thus has at least functional modules and beneficial effects corresponding to the above method.

[0064] Example 3 like Figure 5 As shown, this embodiment provides an electronic device, including: at least one processor; and a memory communicatively connected to at least one of the processors; wherein, The memory stores instructions executable by at least one of the processors, and the instructions are executed by at least one of the processors to enable at least one of the processors to perform the above method. At least one processor in the electronic device can perform the above method, and thus has at least the same advantages as the above method.

[0065] Optionally, the electronic device also includes interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. The various components are connected to each other using different buses and can be installed on a common mainboard or installed in other ways as needed. The processor can process instructions executed in the electronic device, including instructions stored in or on a memory to display graphical information of a GUI (Graphical User Interface) on an external input / output device (such as a display device coupled to an interface). In other embodiments, if necessary, multiple processors can be used together with multiple memories, and / or multiple buses can be used together with multiple memories. Similarly, multiple electronic devices can be connected (for example, as a server array, a group of blade servers, or a multi-processor system), and each device provides some necessary operations. Figure 5 A processor 301 is taken as an example.

[0066] The memory 302, as a computer-readable storage medium, can be used to store software programs, computer executable programs and modules, such as program instructions / modules corresponding to the vehicle safety distance warning method in the embodiment of the present application (for example, the safety distance reference value determination module, the driving scene determination module, the safety distance adjustment coefficient determination module, the safety distance determination module, and the warning module in the vehicle safety distance warning device). The processor 301 executes various functional applications and data processing of the device by running the software programs, instructions and modules stored in the memory 302, that is, realizes the above-mentioned vehicle safety distance warning method.

[0067] The memory 302 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system and at least one application required for a function; the data storage area may store data created according to the use of the terminal, etc. In addition, the memory 302 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 302 may further include a memory remotely arranged relative to the processor 301, and these remote memories may be connected to the device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0068] The electronic device may further include: an input device 303 and an output device 304. The processor 301, the memory 302, the input device 303 and the output device 304 may be connected via a bus or other means. Figure 5 The example of connecting through bus is taken in the following.

[0069] The input device 303 can receive input digital or character information, and the output device 304 can include a display device, an auxiliary lighting device (e.g., LED), and a tactile feedback device (e.g., a vibration motor), etc. The display device can include, but is not limited to, a liquid crystal display (LCD), a light emitting diode (LED) display, and a plasma display. In some embodiments, the display device can be a touch screen.

[0070] Example 4 This embodiment provides a computer-readable storage medium, on which computer instructions are stored, and the computer instructions are used to enable a computer to execute the above method. The computer instructions on the computer-readable storage medium are used to enable a computer to execute the above method, and thus have at least the same advantages as the above method.

[0071] The medium in this application may adopt any combination of one or more computer-readable media. The medium may be a computer-readable signal medium or a computer-readable storage medium. The medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination thereof. More specific examples of the medium (a non-exhaustive list) include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this document, the medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, device, or device.

[0072] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, which carry computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0073] The program code contained on the computer-readable medium can be transmitted using any appropriate medium, including but not limited to wireless, wire, optical cable, RF (Radio Frequency), etc., or any suitable combination of the above.

[0074] Computer program code for performing the operation of the present application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (e.g., using an Internet service provider to connect through the Internet).

[0075] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this application can be executed in parallel, sequentially or in different orders, as long as the expected results of the technical solution disclosed in this application can be achieved, and this document is not limited here.

[0076] The above specific implementations do not constitute a limitation on the protection scope of this application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included in the protection scope of this application.

Claims

1. A vehicle safety distance warning method, characterized in that: include: Determine the safety distance reference value according to the vehicle speed; Determine the driving scenario based on at least one of the vehicle types of the vehicles in front of and behind the vehicle, the road section where the vehicle is located, and the weather conditions; Determining a safety distance adjustment coefficient according to the driving scenario; Determining a safe vehicle distance according to the safety distance reference value and the safety distance adjustment coefficient; When the current vehicle distance is less than or equal to the warning threshold, a warning message is issued; The warning threshold is a preset ratio of the safe vehicle distance.

2. The vehicle safety distance warning method according to claim 1, characterized in that: The driving scenario includes at least one standard scenario, each standard scenario corresponds to a safety distance adjustment coefficient, and the safety distance adjustment coefficients of all standard scenarios are all equal, all unequal, or partially equal.

3. The vehicle safety distance warning method according to claim 2, characterized in that: In the case that the driving scenario includes multiple standard scenarios, the safety distance adjustment coefficient of the driving scenario is determined according to the maximum value of the safety distance adjustment coefficients corresponding to the multiple standard scenarios.

4. The vehicle safety distance warning method according to claim 2, characterized in that: Standard scenarios include heavy trucks in front and behind the vehicle, driving in bad weather, and driving on a long downhill slope.

5. The vehicle safety distance warning method according to claim 1, characterized in that: The issuing of the warning information includes: controlling the projection lamp to project the first safe vehicle distance prompt information onto the road surface according to the width of the vehicle, the height of the projection lamp, the distance between the left and right ends of the projection lamp and the safe vehicle distance.

6. The vehicle safety distance warning method according to claim 5, characterized in that: The step of controlling the projection lamp to project the first safe vehicle distance prompt information onto the road surface according to the width of the vehicle, the height of the projection lamp, the distance between the left and right ends of the projection lamp, and the safe vehicle distance comprises: Determining a first emission angle of the projection light according to the height of the projection light and the safe vehicle distance; Determining a second emission angle of the projection light according to the width of the vehicle, the distance between the left and right ends of the projection light, and the safe vehicle distance; According to the first emission angle of the projection light and the second emission angle of the projection light, the projection lamp is controlled to project first safe vehicle distance prompt information onto the road surface; the first safe vehicle distance prompt information includes a vehicle distance line and the safe vehicle distance.

7. The vehicle safety distance warning method according to claim 1, characterized in that: The issuing of the warning information includes: controlling the HUD to display a safe distance between the vehicle and the vehicle ahead.

8. The vehicle safety distance warning method according to claim 1, characterized in that: The warning information includes: playing a prompt voice to keep a safe distance, playing a prompt voice of the type of vehicles behind and behind the vehicle when the vehicle type is a heavy truck, playing a prompt voice of the section of the road where the vehicle is located when the road section where the vehicle is located is a long downhill section, and playing a prompt voice of the weather conditions when the weather conditions are rainy, snowy or foggy.

9. A vehicle safety distance warning device, characterized in that: include: A safety distance reference value determination module is used to determine a safety distance reference value according to the vehicle speed; A driving scene determination module, used to determine the driving scene according to at least one of the vehicle types of the vehicles in front and behind the vehicle, the road section where the vehicle is located, and the weather conditions; A safety distance adjustment coefficient determination module, used to determine the safety distance adjustment coefficient according to the driving scenario; A safe vehicle distance determination module, used to determine the safe vehicle distance according to the safe distance reference value and the safe distance adjustment coefficient; The warning module is used to issue a warning message when the current vehicle distance is less than or equal to a warning threshold; the warning threshold is a preset proportion of the safe vehicle distance.

10. An electronic device, characterized in that: include: at least one processor, and a memory communicatively coupled to at least one of the processors; The memory stores instructions executable by at least one of the processors, and the instructions are executed by at least one of the processors so that the at least one processor can execute the method according to any one of claims 1 to 8.

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