A brake warning method, device, controller, storage medium and automobile

Abstract

The application relates to the technical field of vehicle brake warning, and discloses a brake warning method, a brake warning device, a controller, a storage medium and an automobile. The brake warning method comprises the following steps: acquiring speed information of a front vehicle, brake information of a rear vehicle and distance information between the front vehicle and the rear vehicle; determining warning information according to the speed information, the brake information and the distance information; and sending prompt information to a terminal device of the rear vehicle according to the warning information, so that a driver adjusts a current brake intensity according to the prompt information. Whether the current brake intensity should be adjusted can be determined according to the driving speeds of the front and rear vehicles and the distance between the front and rear vehicles under different conditions, so that the problem that the driver and the passengers feel uncomfortable when the distance between the front and rear vehicles is suddenly increased or the vehicle automatically triggers the emergency brake when the distance between the front and rear vehicles is suddenly increased due to the fact that the driver does not timely adjust the brake intensity when the distance between the front and rear vehicles is far.

Description

Technical Field

[0001] This application relates to the field of vehicle brake warning technology, and in particular, to a brake warning method, device, controller, storage medium, and automobile. Background Technology

[0002] When driving, especially at a medium to long distance from the vehicle in front, it's often difficult to judge the braking force of the vehicle ahead due to the greater distance. Drivers, being far from the vehicle, tend to apply less braking force when braking. These factors can lead to initially weak braking, and even when the distance to the vehicle ahead is close, the vehicle's speed remains high. This forces the driver to brake harder when the distance is already short, potentially triggering emergency braking, which can cause discomfort for the driver and passengers, affecting ride comfort. Summary of the Invention

[0003] This application provides a brake warning method, device, controller, storage medium, and automobile to improve the comfort of the driver and passengers when the vehicle brakes.

[0004] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0005] According to one aspect of the embodiments of this application, a brake warning method is provided, the method comprising:

[0006] Obtain information on the speed of the vehicle in front, the braking information of the vehicle behind, and the distance between the two vehicles.

[0007] The warning information is determined based on the speed information, the braking information, and the distance information;

[0008] The warning information is sent to the terminal device of the following vehicle so that the driver can adjust the current braking force accordingly.

[0009] In one embodiment of this application, based on the foregoing scheme, determining the warning information according to the speed information, the braking information, and the distance information includes:

[0010] Based on the speed information, the braking information, the preset time variable, and the distance information, a relative distance relationship equation between the preceding vehicle and the following vehicle is generated. The relative distance relationship equation is used to characterize the relationship between the time variable and the distance information.

[0011] The warning information is determined based on the relative distance relationship equation and the braking information.

[0012] In one embodiment of this application, based on the foregoing scheme, the speed information includes the speed and acceleration of the preceding vehicle; the braking information includes the speed and acceleration of the following vehicle; and a relative distance relationship equation between the preceding and following vehicles is generated based on the speed information, the braking information, a preset time variable, and the distance information. This relative distance relationship equation characterizes the relationship between the time variable and the distance information, including:

[0013] Based on the speed and acceleration of the preceding vehicle, the speed and acceleration of the following vehicle, and the time variable, a relative speed relationship equation between the preceding vehicle and the following vehicle is generated. The relative speed relationship equation is used to characterize the relationship between the time variable and the relative distance between the preceding vehicle and the following vehicle.

[0014] The relative distance relationship equation between the preceding vehicle and the following vehicle is generated based on the relative speed relationship equation, the distance information, and the time variable.

[0015] In one embodiment of this application, based on the foregoing scheme, determining the warning information according to the relative distance relationship equation and the braking information includes:

[0016] A first braking distance relationship equation is generated based on the acceleration of the following vehicle, the preset first braking acceleration, and the relative velocity relationship equation.

[0017] A second braking distance relationship equation is generated based on the acceleration of the following vehicle, the preset second braking acceleration, and the relative velocity relationship equation.

[0018] The warning information is determined based on the positional relationship of the curves formed by the relative distance relationship equation, the first braking distance relationship equation, and the second braking distance relationship equation on a two-dimensional coordinate system.

[0019] In one embodiment of this application, based on the foregoing scheme, determining the warning information according to the positional relationship of the relative distance relationship equation, the first braking distance relationship equation, and the second braking distance relationship equation in a two-dimensional coordinate system includes:

[0020] If the first curve formed by the relative distance relationship equation on the two-dimensional coordinate system is above the second curve formed by the first braking distance relationship equation on the two-dimensional coordinate system, and the first curve does not intersect with the second curve, no warning will be issued;

[0021] If the first curve intersects the second curve, and the first curve intersects the third curve formed by the second braking distance relationship equation on the two-dimensional coordinate system, the relative speed between the front vehicle and the rear vehicle is obtained based on the relative speed relationship equation.

[0022] If the relative speed is lower than the first target speed, a level one warning will be issued;

[0023] If the relative speed is higher than the speed of the first target but lower than the speed of the second target, a level two warning will be issued;

[0024] Wherein, the second curve is located above the third curve; the first target speed is the relative speed corresponding to the intersection point of the first curve and the second curve, the second target speed is the relative speed corresponding to the intersection point of the first curve and the third curve, and the first target speed is lower than the second target speed.

[0025] In one embodiment of this application, based on the foregoing scheme, sending a prompt message to the terminal device of the following vehicle according to the warning information includes:

[0026] If the warning information is a Level 1 warning, a prompt message to appropriately increase the braking force is sent to the terminal device;

[0027] If the warning information is a level two warning, a prompt message to significantly increase the braking force is sent to the terminal device.

[0028] According to one aspect of the embodiments of this application, a brake warning device is provided. The brake warning device includes an acquisition unit, configured to acquire speed information of a preceding vehicle, braking information of a following vehicle, and distance information between the preceding and following vehicles; a determination unit, configured to determine warning information based on the speed information, the braking information, and the distance information; and a sending unit, configured to send a prompt message to a terminal device of the following vehicle based on the warning information, so that the driver can adjust the current braking force according to the prompt message.

[0029] According to one aspect of the embodiments of this application, a computer-readable storage medium is provided, on which a computer program is stored, the computer program including executable instructions that, when executed by a processor, implement the brake warning method as described in the above embodiments.

[0030] According to one aspect of the embodiments of this application, a controller is provided, the controller including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus;

[0031] Memory, used to store computer programs;

[0032] When the processor executes a program stored in memory, it implements the steps of the brake warning method as described in the above embodiments.

[0033] According to one aspect of the embodiments of this application, a car is provided, the car including a brake warning system and a brake force indicator strip; the brake force indicator strip is used to indicate the current braking force to vehicles behind, and the brake warning system is used to perform the steps of the brake warning method as described in the above embodiments.

[0034] In the technical solution of this application embodiment, warning information is determined by acquiring the speed information of the preceding vehicle, the braking information of the following vehicle, and the distance information between the preceding and following vehicles. Different warning information can be determined based on different speed, braking, and distance information, and different prompts can be given to the driver based on different warning information. The system can determine whether the current braking force should be adjusted based on the driving speed of the preceding and following vehicles and the distance between them under different circumstances. This prevents the driver from failing to adjust the braking force in time when the distance between the preceding and following vehicles is large, which could lead to a sudden increase in braking force or automatic emergency braking when the distance between the preceding and following vehicles is small, causing discomfort to the driver and passengers.

[0035] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0036] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0037] Figure 1 This is a flowchart illustrating a brake warning method according to an embodiment of this application;

[0038] Figure 2 This is a flowchart illustrating a method for determining warning information based on the speed information, the braking information, and the distance information according to an embodiment of this application.

[0039] Figure 3 This is a block diagram illustrating a brake warning device according to an embodiment of this application;

[0040] Figure 4 This is a schematic diagram of a brake force indicator light strip according to an embodiment of this application;

[0041] Figure 5 This is a structural diagram of the controller according to an embodiment of this application;

[0042] Figure 6 This is a schematic diagram showing the position of the first curve above the second curve according to an embodiment of this application;

[0043] Figure 7 This is a schematic diagram showing the intersection positions of the first curve, the second curve, and the third curve according to an embodiment of this application;

[0044] Figure 8 This is a schematic diagram illustrating the visualization of the warning information during a Level 1 early warning, according to an embodiment of this application.

[0045] Figure 9 This is a schematic diagram illustrating another level-one warning message visualization according to an embodiment of this application. Detailed Implementation

[0046] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0047] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0048] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller node devices.

[0049] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0050] It should be noted that "multiple" in this article refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0051] The implementation details of the technical solutions in the embodiments of this application are described in detail below:

[0052] First, it should be noted that the brake warning scheme proposed in this application can be applied to related technical fields of vehicle brake warning. For example, it addresses the problem of drivers failing to adjust braking force in time when the distance between them is large, resulting in sudden, forceful braking when the distance is small, causing discomfort to the driver and passengers. Therefore, providing warnings during vehicle braking to prompt the driver to adjust the current braking force and improve the comfort of the driver and passengers is particularly important.

[0053] According to one aspect of this application, a brake warning method is provided. Figure 1 The flowchart illustrates a braking warning method according to an embodiment of this application. The testing method for the vehicle speed limiting system includes at least steps 110 to 130, which are described in detail below:

[0054] In step 110, the speed information of the vehicle in front, the braking information of the vehicle behind, and the distance information between the vehicle in front and the vehicle behind are obtained.

[0055] In this application, millimeter-wave radar and acceleration sensors equipped in the vehicle can be used to acquire information such as the speed of the vehicle in front, the braking information of the vehicle behind, and the distance between the two vehicles. The acquired information can then be uploaded to the brake warning system via CAN communication.

[0056] Continue to refer to Figure 1 In step 120, warning information is determined based on the speed information, the braking information, and the distance information.

[0057] In this application, warning information can be determined by speed information, braking information, and distance information. Different warning information can be determined based on the speed and acceleration of the vehicles relative to the ground and the relative distance between the vehicles in different situations, so as to adjust different braking forces. This allows the following vehicle to avoid collisions with the vehicle in front while further improving the comfort of the driver and passengers in the following vehicle.

[0058] In one embodiment of this application, warning information is determined based on the speed information, the braking information, and the distance information, such as... Figure 2 As shown, steps S1 to S2 can be followed:

[0059] Step S1: Generate a relative distance relationship equation between the preceding vehicle and the following vehicle based on the speed information, the braking information, the preset time variable, and the distance information. The relative distance relationship equation is used to characterize the relationship between the time variable and the distance information.

[0060] Step S2: Determine the warning information based on the relative distance relationship equation and the braking information.

[0061] In this embodiment, a relative distance relationship equation can be generated based on the speed information of the preceding vehicle, the braking information of the following vehicle, the distance information between the preceding and following vehicles, and a preset time variable t. This equation allows us to obtain the relative distance between the preceding and following vehicles after time t, enabling us to calculate whether a collision will occur if the following vehicle maintains its current speed and braking force, thus providing a reference for determining subsequent warning information.

[0062] In one embodiment of this application, the speed information includes the speed and acceleration of the preceding vehicle; the braking information includes the speed and acceleration of the following vehicle; and step S1 includes steps S11 and S12.

[0063] Step S11: Generate a relative speed relationship equation between the front vehicle and the rear vehicle based on the speed of the front vehicle, the acceleration of the front vehicle, the speed of the rear vehicle, the acceleration of the rear vehicle, and the time variable. The relative speed relationship equation is used to characterize the relationship between the time variable and the relative distance between the front vehicle and the rear vehicle.

[0064] Step S12: Generate the relative distance relationship equation between the front vehicle and the rear vehicle based on the relative speed relationship equation, the distance information, and the time variable.

[0065] In this embodiment, the relative velocity relationship equation consists of the relative velocity U0 of the front and rear vehicles, the relative acceleration a0 of the front and rear vehicles, the time variable t, and the relative velocity variable U of the front and rear vehicles. t The composition and relative velocity relationship equation can be derived from the following formula: U t =U0+a0*t, which can be used to calculate the relative speed of the front and rear vehicles after time t.

[0066] Furthermore, in step S12, the relative distance relationship equation consists of the relative velocity U0 of the front and rear vehicles, the relative acceleration a0 of the front and rear vehicles, the time variable t, the relative distance L0 between the front and rear vehicles, and the relative distance variable L between the front and rear vehicles. t And the relative speed variable U between the front and rear vehicles t The equation relating the composition and relative distances can be derived using the following formula: L t =U0*((U t -U0) / a0)+(1 / 2)*a0*((U t -U0) / a0)*((U t The equation -U0) / a0)+L0 can be used to calculate the relative distance between the vehicles after time t. This means that if the driver applies the current braking force, the acceleration of the vehicle behind will also remain unchanged, since the braking force remains constant. This allows for a prediction of whether the vehicle in front will collide with the vehicle in front if the driver applies the current braking force. Therefore, the relative distance equation can be used to issue a warning, determine the corresponding warning information, and prompt the driver whether the current braking force should be adjusted.

[0067] In one embodiment of this application, step S2 includes steps S21, S22 and S23.

[0068] Step S21: Generate a first braking distance relationship equation based on the acceleration of the rear vehicle, the preset first braking acceleration, and the relative velocity relationship equation.

[0069] Step S22: Generate a second braking distance relationship equation based on the acceleration of the rear vehicle, the preset second braking acceleration, and the relative velocity relationship equation.

[0070] Step S23: Determine the warning information based on the positional relationship of the curves formed by the relative distance relationship equation, the first braking distance relationship equation, and the second braking distance relationship equation on the two-dimensional coordinate system.

[0071] In this embodiment, the relative acceleration a0 of the front and rear vehicles and the relative velocity variable U of the front and rear vehicles are obtained from the relative velocity relationship equation. t， The preset first braking acceleration can be specifically defined as the acceleration 'a' relative to the ground when the driver applies a heavy braking force that causes discomfort to the occupants. com The acceleration a of the following car ba Since the acceleration sensor can be used to determine the first braking distance, the equation can be derived from the following formula: L1=(U t *U t ) / 2(a0-(a com -a ba)), where L1 is the equation relating the relative distances between the front and rear vehicles under conditions that would cause discomfort to the occupants.

[0072] It should be noted that when examining whether the braking acceleration of the following vehicle will cause discomfort to the occupants, and when considering emergency braking, the acceleration of the following vehicle relative to the ground is taken into account. The relative acceleration 'a' of the preceding vehicle relative to the following vehicle is also considered. re It equals the acceleration a of the vehicle in front relative to the ground. fr Subtract the acceleration a of the rear vehicle relative to the ground. ba That is: a re =a fr -a ba Because we can use sensors to know the acceleration of the vehicle in front relative to the vehicle behind at a given moment, and the acceleration of the vehicle behind relative to the ground. Because the acceleration *a* of the vehicle relative to the ground during emergency braking... max The acceleration *a* relative to the ground when the driver applies heavy braking force, causing discomfort to the occupants. com All of these are known.

[0073] In this embodiment, similarly, step S22 is also explained based on the above principle. The preset second braking acceleration can be specifically the acceleration 'a' of the vehicle relative to the ground when the vehicle brakes suddenly. max Therefore, the second braking distance equation can be derived from the following formula: L2=(U t *U t ) / 2(a0-(a max -a ba )), where L2 is the equation relating the relative distances between the front and rear vehicles in the event of emergency braking.

[0074] Through L t The positional relationship of the curves L1, L2, and L2 in the two-dimensional coordinate system is used to determine what kind of warning information should be determined under different circumstances. The warning information includes first-level warning, second-level warning, and there may also be situations where no warning is triggered.

[0075] In one embodiment of this application, step S23 may be performed according to steps S231, S232, S233, and S234:

[0076] Step S231: If the first curve formed by the relative distance relationship equation on the two-dimensional coordinate system is above the second curve formed by the first braking distance relationship equation on the two-dimensional coordinate system, and the first curve does not intersect with the second curve, no warning is issued.

[0077] Step S232: If the first curve intersects with the second curve, and the first curve intersects with the third curve formed by the second braking distance relationship equation on the two-dimensional coordinate system, obtain the relative speed between the front vehicle and the rear vehicle based on the relative speed relationship equation.

[0078] Step S233: If the relative speed is lower than the first target speed, issue a first-level warning.

[0079] Step S234: If the relative speed is higher than the first target speed but lower than the second target speed, a level two warning is issued.

[0080] In this embodiment, in order to better understand the relative distance relationship equation L t The first curve Q1 formed on the two-dimensional coordinate system is positioned above the second curve Q2 formed on the two-dimensional coordinate system by the first braking distance relationship equation L1.

[0081] like Figure 6 As shown, L in the two-dimensional coordinate system represents the relative distance between the vehicle in front and the vehicle behind, and U in the two-dimensional coordinate system represents the relative speed between the vehicle in front and the vehicle behind. Obviously, no matter how the relative speed between the vehicle in front and the vehicle behind changes, the relative distance between the vehicle in front and the vehicle behind is greater than that of the second curve Q2 and the third curve Q3. In other words, no matter how the relative speed between the vehicle in front and the vehicle behind changes, it is not necessary to brake with an uncomfortable braking force to avoid a collision.

[0082] The relative distance relationship equation L mentioned in step S231 t The first curve Q1 formed on the two-dimensional coordinate system is compared with the second curve Q2 formed on the two-dimensional coordinate system by the first braking distance relationship equation L1. If the first curve Q1 is entirely above the second curve Q2 and Q1 and Q2 do not intersect, it means that the relative distance between the front and rear vehicles is greater than the relative distance between the front and rear vehicles under conditions that cause discomfort to the driver and passengers, indicating that the driver can brake according to the current braking force and avoid collision with the front vehicle while maintaining a comfortable ride.

[0083] In this embodiment, to better understand the positional relationship where the first curve Q1 intersects the second curve Q2, and the first curve Q1 intersects the third curve Q3 formed by the second braking distance relationship equation L2 on the two-dimensional coordinate system, as follows: Figure 7 As shown, L in the two-dimensional coordinate system represents the relative distance between the front and rear vehicles, and U in the two-dimensional coordinate system also represents the relative speed between the front and rear vehicles.

[0084] exist Figure 7In the diagram, the first curve Q1 intersects with the second curve Q2 to form intersection point A, and the first curve Q1 intersects with the third curve Q3 to form intersection point B. Therefore, the level of warning can be determined by the speed range of the relative speed between the vehicle in front and the vehicle behind.

[0085] The first target speed refers to the relative speed corresponding to intersection point A, which represents the relative distance between the vehicles in front and behind that would cause discomfort to the driver and passengers. In other words, if the relative speeds of the vehicles in front and behind follow the trend of the first curve Q1, they will reach the relative distance between the vehicles in front and behind that would cause discomfort to the driver and passengers at point A. Therefore, when the vehicle is in the area corresponding to the portion of the first curve Q1 to the left of point A, a first-level warning will be issued, indicating that an uncomfortable braking force is required to avoid a collision during subsequent driving.

[0086] That is, when the relative speed mentioned in step S233 is lower than the first target speed, a first-level warning will be issued. If the relative speed is lower than the relative speed corresponding to point A, a first-level warning will be issued to remind the driver to increase the braking force appropriately to prevent the need to brake with an uncomfortable braking force to avoid collision during subsequent driving.

[0087] The second target speed refers to the relative speed at intersection point B, which represents the relative distance between the vehicles in an emergency braking scenario. In other words, if the relative speed between the vehicles is between points A and B, a level two warning is issued, prompting the driver to significantly increase braking force to avoid emergency braking. If the relative speed exceeds the second target speed, a collision will occur.

[0088] It should be noted that the appendix Figure 6 and appendix Figure 7 This is simply to better understand the relative positions of the first curve Q1, the second curve Q2, and the third curve Q3.

[0089] In one embodiment of this application, step S3 includes steps S31 and S32.

[0090] Step S31: If the warning information is a Level 1 warning, send a prompt message to the terminal device to appropriately increase the braking force.

[0091] Step S32: If the warning information is a level 2 warning, send a prompt message to the terminal device to significantly increase the braking force.

[0092] Assume the acceleration of the following vehicle relative to the ground is a. ba The acceleration 'a' of a vehicle relative to the ground during emergency braking. maxThe braking acceleration a of the following vehicle relative to the ground ba The difference is a1 = a max -a ba The acceleration *a* relative to the ground when the driver applies heavy braking force, causing discomfort to the occupants. com The braking acceleration a of the following vehicle relative to the ground ba The difference a2 = a com -a ba

[0093] So, if the acceleration of the preceding vehicle relative to the ground remains constant, and the acceleration 'a' of the following vehicle relative to the ground increases when the driver of the following vehicle brakes with great force to cause discomfort to the occupants... com If braking is applied, the acceleration of the car in front relative to the car behind is a. re -a2

[0094] So, if the acceleration of the vehicle in front relative to the ground remains constant, and the acceleration of the vehicle behind is 'a' (the acceleration of the vehicle relative to the ground during emergency braking)... max If braking is applied, the acceleration of the car in front relative to the car behind is a. re -a1

[0095] In other words, if the vehicle in front has a constant acceleration, and the driver of the vehicle behind brakes with a large force that causes discomfort to the occupants, the acceleration *a* relative to the ground will be different. com When braking, if the distance L between the car in front and the car behind and its speed U satisfy L = (U*U) / 2(a re If -a1), then collisions can be avoided.

[0096] If the following vehicle accelerates at the same rate as the vehicle in front while the vehicle in front continues to accelerate, and the following vehicle accelerates at the same rate as the vehicle accelerating relative to the ground during emergency braking (a)... max When braking, if the distance L between the car in front and the car behind and its speed U satisfy L = (U*U) / 2(a re -a2), then collisions can be avoided.

[0097] Based on the relationships derived earlier, at a certain time t0, assuming the velocity of the car in front relative to the car behind is U0, the acceleration of the car in front relative to the car behind is a0, the distance between the car in front and the car behind is L0, and the acceleration of the car behind relative to the ground is a... ba The acceleration relative to the ground when the driver of the following vehicle brakes with great force to cause discomfort to the occupants is a. com The acceleration of the following vehicle relative to the ground when it brakes suddenly is a. max .

[0098] In this embodiment, the terminal device can specifically be the vehicle's dashboard and in-vehicle speaker. Based on the determined warning information, if the current warning is Level 1, the instrument panel and voice prompts the driver to appropriately increase braking force to prevent the driver from having to brake with uncomfortable force to avoid a collision during subsequent driving. If the current warning is Level 2, the instrument panel and voice prompts the driver to significantly increase braking force and gradually reduce vehicle speed to prevent the vehicle from triggering emergency braking.

[0099] Continue to refer to Figure 1 In step 130, a prompt message is sent to the terminal device of the following vehicle based on the warning information, so that the driver can adjust the current braking force according to the prompt message.

[0100] In one embodiment of this application, the step of sending a prompt message to the terminal device of the following vehicle based on the warning information can be performed according to steps S3 and S4.

[0101] Step S3: If the warning information is a Level 1 warning, send a prompt message to the terminal device to appropriately increase the braking force.

[0102] Step S4: If the warning information is a level 2 warning, send a prompt message to the terminal device to significantly increase the braking force.

[0103] In this embodiment, the terminal device can specifically be the vehicle's dashboard and in-vehicle speaker. Based on the determined warning information, if the current warning is Level 1, the instrument panel and voice prompts the driver to appropriately increase braking force to prevent the driver from having to brake with uncomfortable force to avoid a collision during subsequent driving. If the current warning is Level 2, the instrument panel and voice prompts the driver to significantly increase braking force and gradually reduce vehicle speed to prevent the vehicle from triggering emergency braking.

[0104] Figure 3 This is a block diagram illustrating a brake warning device according to an embodiment of this application, with reference to... Figure 3 As shown, a brake warning device 400 according to an embodiment of this application includes: an acquisition unit 401, a determination unit 402, and a sending unit 403.

[0105] The acquisition unit 401 is used to acquire the speed information of the vehicle in front, the braking information of the vehicle behind, and the distance information between the vehicle in front and the vehicle behind.

[0106] The determining unit 402 is used to determine warning information based on the speed information, the braking information, and the distance information.

[0107] The sending unit 403 is used to send a prompt message to the terminal device of the following vehicle according to the warning information, so that the driver can adjust the current braking force according to the prompt message.

[0108] On the other hand, this application also provides a vehicle including a brake warning system and a brake pressure indicator light strip, wherein the brake pressure indicator light strip has the following structure: Figure 4 As shown, it is used to indicate the current braking force to vehicles behind, and the brake warning system is used to perform the steps of the brake warning method provided in the above embodiments.

[0109] To accurately and clearly indicate the braking force of the vehicle behind, a special brake force indicator light strip has been designed. This brake force indicator light strip is located at the rear of the vehicle and is used in conjunction with the braking status and full braking force indicator light strip.

[0110] like Figure 4 As shown, the brake pressure indicator light will illuminate when the vehicle brakes. Figure 4 The system includes indicator lights for braking status and full braking force. The braking status light strip is the long rectangular bar above ten rectangles, while the full braking force indicator light strip consists of ten rectangles arranged side by side. The brake force indicator light strip illuminates when the vehicle brakes. Figure 4 If five rectangles are illuminated, it means that the current braking force of the vehicle is 50% of the full braking force, and the braking status light strip will also be illuminated.

[0111] It is important to note that Figure 4 This is just an illustration; the rear design of the vehicle may vary and can be customized to other shapes. Furthermore, the brake pressure indicator light strip can be further refined to provide higher resolution for brake pressure indication. When the driver presses the brake pedal or the vehicle's automatic braking system is activated, the brake pressure indicator light strip illuminates, alerting vehicles behind that the vehicle is braking. The indicator light strip displays the current braking force in real time, with the force indicated by the percentage of the illuminated brake pressure indicator light strip's width relative to the width of the full braking force indicator light strip.

[0112] For example, when the braking force is 100%, all brake force indicator lights are illuminated, and the length of the illuminated strip is equal to the length of the braking status and full braking force indicator lights. When the braking force is 50%, half of the brake force indicator lights are illuminated, and the total width of the illuminated strip is equal to half the width of the braking status and full braking force indicator lights.

[0113] To avoid the lack of intuitiveness in directly displaying vehicle distance, and the poor readability of changing numbers, such as... Figures 8-9As shown, the distance to other vehicles is represented by arrows or horizontal lines, which change in length in real time as the distance changes. In addition, based on the judgment, if the current braking force is appropriate, the distance display bar will be displayed in green or blue without the brake pedal or warning text.

[0114] If the system detects a Level 1 warning and triggers it, the distance indicator bar will turn yellow, a yellow pedal will flash above the bar, and an audio or beeping sound will be emitted, displaying the message: "Brake comfort warning, please increase braking force." Figure 8 as well as Figure 9 All of these are visual patterns displayed when a Level 1 warning is triggered.

[0115] Furthermore, if the judgment triggers a level 2 warning, the distance display bar will turn red, and a red pedal above it will flash, accompanied by a voice message or a high-frequency beep, and the message "Emergency braking warning, please increase braking force" will be displayed.

[0116] It should be noted that the shapes shown in the figure are only two ways to visualize warnings. In other embodiments, other different shapes can be used for visualization.

[0117] See Figure 5 This application provides a controller, including a processor 111, a communication interface 112, a memory 113, and a communication bus 114, wherein the processor 111, the communication interface 112, and the memory 113 communicate with each other through the communication bus 114.

[0118] Memory 113 is used to store computer programs;

[0119] The processor 111 is used to execute the program stored in the memory 113 to implement the brake warning method provided in the above embodiment.

[0120] This application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by processor 111, implements the steps of the brake warning method provided in the above embodiments.

[0121] Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solutions according to the embodiments of this application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, external hard drive, etc.) or on a network, including several instructions to cause a computing device (such as a personal computer, server, terminal device, or network device, etc.) to execute the method according to the embodiments of this application.

[0122] Furthermore, the above figures are merely illustrative of the processes included in the method according to exemplary embodiments of this application, and are not intended to be limiting. It is readily understood that the processes shown in the above figures do not indicate or limit the temporal order of these processes. Additionally, it is readily understood that these processes may be executed synchronously or asynchronously, for example, in multiple modules.

[0123] It should be understood that this application is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

[0124] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0125] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the invention herein.

Claims

1. A brake warning method, characterized by, The method comprises: obtaining speed information of a front vehicle, brake information of a rear vehicle, and distance information between the front vehicle and the rear vehicle; determining early warning information according to the speed information, the brake information, and the distance information; sending prompt information to a terminal device of the rear vehicle according to the early warning information, so that a driver adjusts a current brake intensity according to the prompt information; the determination of the early warning information according to the speed information, the brake information, and the distance information comprises: generating a relative distance relationship equation of the front vehicle and the rear vehicle based on the speed information, the brake information, a preset time variable, and the distance information, the relative distance relationship equation being used to represent a relationship between the time variable and the distance information; determining the early warning information according to the relative distance relationship equation and the brake information; the speed information comprises a speed of the front vehicle and an acceleration of the front vehicle; the brake information comprises a speed of the rear vehicle and an acceleration of the rear vehicle; the generation of the relative distance relationship equation of the front vehicle and the rear vehicle based on the speed information, the brake information, a preset time variable, and the distance information, the relative distance relationship equation being used to represent a relationship between the time variable and the distance information, comprises: generating a relative speed relationship equation of the front vehicle and the rear vehicle based on the speed of the front vehicle, the acceleration of the front vehicle, the speed of the rear vehicle, the acceleration of the rear vehicle, and the time variable, the relative speed relationship equation being used to represent a relationship between the time variable and a relative distance between the front vehicle and the rear vehicle; generating the relative distance relationship equation of the front vehicle and the rear vehicle based on the relative speed relationship equation, the distance information, and the time variable; the determination of the early warning information according to the relative distance relationship equation and the brake information comprises: generating a first brake distance relationship equation based on the acceleration of the rear vehicle, a preset first brake acceleration, and the relative speed relationship equation; generating a second brake distance relationship equation based on the acceleration of the rear vehicle, a preset second brake acceleration, and the relative speed relationship equation; determining the early warning information according to a position relationship of curves formed by the relative distance relationship equation, the first brake distance relationship equation, and the second brake distance relationship equation in a two-dimensional coordinate system; the determination of the early warning information according to the position relationship of the relative distance relationship equation, the first brake distance relationship equation, and the second brake distance relationship equation in the two-dimensional coordinate system comprises: if a first curve formed by the relative distance relationship equation in the two-dimensional coordinate system is located above a second curve formed by the first brake distance relationship equation in the two-dimensional coordinate system, and the first curve does not intersect the second curve, no early warning is performed. if the first curve intersects the second curve and the first curve intersects a third curve formed by the second brake distance relationship equation on the two-dimensional coordinate system, obtaining a relative speed between the front vehicle and the rear vehicle based on the relative speed relationship equation; if the relative speed is lower than a first target speed, performing a first-level early warning; if the relative speed is higher than the first target speed and lower than a second target speed, performing a second-level early warning; wherein the second curve is located above the third curve; the first target speed is a relative speed corresponding to an intersection point of the first curve and the second curve, and the second target speed is a relative speed corresponding to an intersection point of the first curve and the third curve, and the first target speed is lower than the second target speed.

2. The brake warning method of claim 1, wherein, the sending of prompt information to the terminal device of the rear vehicle according to the early warning information comprises: if the early warning information is the first-level early warning, sending prompt information of appropriately increasing brake intensity to the terminal device; if the early warning information is the second-level early warning, sending prompt information of greatly increasing brake intensity to the terminal device.

3. A brake warning device, characterized by the apparatus comprises: an obtaining unit configured to obtain speed information of a front vehicle, brake information of a rear vehicle, and distance information between the front vehicle and the rear vehicle; a determining unit configured to determine early warning information according to the speed information, the brake information, and the distance information; generate a relative distance relationship equation of the front vehicle and the rear vehicle based on the speed information, the brake information, a preset time variable, and the distance information, the relative distance relationship equation being used to represent a relationship between the time variable and the distance information; determine the early warning information according to the relative distance relationship equation and the brake information; the speed information comprises a speed of the front vehicle and an acceleration of the front vehicle; the brake information comprises a speed of the rear vehicle and an acceleration of the rear vehicle; the generating of the relative distance relationship equation of the front vehicle and the rear vehicle based on the speed information, the brake information, a preset time variable, and the distance information, the relative distance relationship equation being used to represent a relationship between the time variable and the distance information, comprises: generate a relative speed relationship equation of the front vehicle and the rear vehicle based on the speed of the front vehicle, the acceleration of the front vehicle, the speed of the rear vehicle, the acceleration of the rear vehicle, and the time variable, the relative speed relationship equation being used to represent a relationship between the time variable and a relative distance between the front vehicle and the rear vehicle; generate the relative distance relationship equation of the front vehicle and the rear vehicle based on the relative speed relationship equation, the distance information, and the time variable; generate a first brake distance relationship equation based on the acceleration of the rear vehicle, a preset first brake acceleration, and the relative speed relationship equation; generate a second brake distance relationship equation based on the acceleration of the rear vehicle, a preset second brake acceleration, and the relative speed relationship equation; The position relationship of curves formed by the relative distance relationship equation, the first brake distance relationship equation and the second brake distance relationship equation in a two-dimensional coordinate system determines the pre-warning information; The position relationship of curves formed by the relative distance relationship equation, the first brake distance relationship equation and the second brake distance relationship equation in a two-dimensional coordinate system determines the pre-warning information, and the method comprises the following steps: If a first curve formed by the relative distance relationship equation in the two-dimensional coordinate system is located above a second curve formed by the first brake distance relationship equation in the two-dimensional coordinate system, and the first curve does not intersect the second curve, no pre-warning is performed; If the first curve intersects the second curve, and the first curve intersects a third curve formed by the second brake distance relationship equation in the two-dimensional coordinate system, the relative speed between the front vehicle and the rear vehicle is obtained based on the relative speed relationship equation; If the relative speed is lower than a first target speed, a first-level pre-warning is performed; If the relative speed is higher than the first target speed and lower than a second target speed, a second-level pre-warning is performed; The second curve is located above the third curve; the first target speed is a relative speed corresponding to an intersection point of the first curve and the second curve, the second target speed is a relative speed corresponding to an intersection point of the first curve and the third curve, and the first target speed is lower than the second target speed; A sending unit is configured to send prompt information to a terminal device of the rear vehicle according to the pre-warning information, so that a driver adjusts a current brake intensity according to the prompt information.

4. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by a processor to implement the steps of the method of any one of claims 1-2.

5. A controller characterized by comprising: The controller comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus; The memory is configured to store a computer program; The processor is configured to execute the program stored in the memory to implement the steps of the method of any one of claims 1-2.

6. An automobile characterized by comprising: The brake pre-warning system and the brake intensity indication lamp strip are provided, the brake intensity indication lamp strip is configured to indicate a current brake intensity to a rear vehicle, and the brake pre-warning system is configured to execute the steps of the method of any one of claims 1-2.

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