Wading early warning system and method for new energy automobile

Abstract

The invention discloses a new energy automobile wading early warning system and method, and belongs to the technical field of new energy automobile intelligent driving. The system comprises a data acquisition unit used for acquiring front wading area information and surrounding environment information of a target vehicle; the water level sensor is used for detecting the fording depth of the target vehicle; the vehicle speed sensor is used for detecting the running vehicle speed of the target vehicle; the battery management unit is used for acquiring the current residual electric quantity of the target vehicle; the display screen is used for prompting whether the target vehicle can pass through the front wading area or not; and the data processing unit is used for judging whether the target vehicle can pass through the front wading area or not according to the front wading area information and the surrounding environment information of the target vehicle and the wading depth, the running speed and the remaining electric quantity of the target vehicle, and sending a judgment result to the display screen. The system is applied to a scene with a wading area in front, information is integrated through the data processing unit, whether the target vehicle can pass through the wading area or not is obtained through analysis, and safety is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of intelligent driving of new energy vehicles, and specifically relates to a water wading warning system and method for new energy vehicles. Background Art

[0002] With the rapid development of intelligent network technology, intelligent driving technology is becoming more mature. At the same time, with the progress of human society, the diversification and change of global climate are becoming more and more obvious. New energy vehicles will face more extreme application scenarios, including wading scenarios. Therefore, under the general trend of new energy vehicle development, it is particularly important to improve the wading ability of new energy vehicles.

[0003] However, most of the existing new energy vehicle waterproofing technologies are based on waterproofing design and are still at the stage of improving the water resistance of vehicles. They have not yet reached the level of being fully waterproof and not afraid of wading. Driving in wading water can easily cause damage to the vehicle and reduce the service life of the vehicle. At the same time, the existing new energy vehicle waterproofing technologies focus on waterproofing and do not combine waterproofing with driving. When facing wading driving scenes, drivers can only make judgments based on their personal driving experience, which poses a high safety hazard. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a new energy vehicle wading warning system and method, which can give the driver reasonable warning prompts on the premise of ensuring the safety of the vehicle itself, so as to assist the driver to safely pass through the wading area.

[0005] The present invention provides the following technical solutions:

[0006] In a first aspect, a new energy vehicle wading warning system is provided, comprising: a data acquisition unit, for collecting information on a wading area in front of a target vehicle and surrounding environment information; wherein the surrounding environment information includes height information of a vehicle traveling in front of the target vehicle, height information of a static reference object in front of the target vehicle, and depth of a ground depression in front of the target vehicle; a water level sensor, for detecting the wading depth of the target vehicle; a vehicle speed sensor, for detecting the driving speed of the target vehicle; a battery management unit, for obtaining the current remaining power of the target vehicle; a display screen, for prompting whether the target vehicle can pass through the wading area in front; a data processing unit, connected to the data acquisition unit, the water level sensor, the vehicle speed sensor, the battery management unit and the display screen, for judging whether the target vehicle can currently pass through the wading area in front according to the information on the wading area in front of the target vehicle and surrounding environment information, the wading depth, the driving speed and the remaining power of the target vehicle, and sending the judgment result to the display screen.

[0007] As an optional technical solution of the present invention, it also includes: a navigation positioning unit, connected to the data processing unit, for obtaining the current position information of the target vehicle and sending it to the data processing unit.

[0008] As an optional technical solution of the present invention, the water-related area information includes the length of the water-related area.

[0009] As an optional technical solution of the present invention, the data acquisition unit includes a camera and a radar, which are jointly arranged around the target vehicle.

[0010] As an optional technical solution of the present invention, the height information of the vehicle traveling in front of the target vehicle includes the height of the traveling vehicle and the height of the traveling vehicle exposed to the wading area; the height information of the static reference object in front of the target vehicle includes the height of the static reference object and the height of the static reference object exposed to the wading area.

[0011] In a second aspect, a warning method based on the new energy vehicle wading warning system according to the first aspect is provided, comprising: obtaining wading area information in front of the target vehicle, surrounding environment information and wading depth of the target vehicle;

[0012] Determine whether there is a moving vehicle or a static reference object in front of the target vehicle based on the surrounding environment information of the target vehicle;

[0013] If it exists, the water depth of the wading area is calculated based on the height information of the moving vehicle or the static reference object; if it does not exist, the water depth of the wading area is calculated based on the wading depth of the target vehicle and the depth of the ground depression in front of the target vehicle;

[0014] Determine whether the water depth in the wading area is greater than the safe depth. If so, determine whether the target vehicle can pass through the wading area based on the wading area information in front of the target vehicle, the target vehicle's driving speed and the remaining power, and issue a warning prompt through the display screen; if not, prompt the target vehicle through the display screen that it can pass through the wading area.

[0015] As an optional technical solution of the present invention, if there is a moving vehicle in front of the target vehicle, the water depth of the wading area is expressed as:

[0016] ;

[0017] Among them, H represents the water depth of the wading area, Indicates the height of the vehicle. Indicates the height of the moving vehicle above the wading area;

[0018] If there is a static reference object in front of the target vehicle, the water depth in the wading area is expressed as:

[0019] ;

[0020] Among them, H represents the water depth of the wading area, represents the height of the static reference object, Indicates the height of the static reference object above the wading area;

[0021] If there is no moving vehicle or static reference object in front of the target vehicle, the water depth in the wading area is expressed as:

[0022] ;

[0023] Among them, H represents the water depth of the wading area, Indicates the wading depth of the target vehicle, Indicates the depth of the ground depression in front of the target vehicle.

[0024] As an optional technical solution of the present invention, the method of judging whether the target vehicle can pass through the wading area based on the wading area information in front of the target vehicle, the driving speed of the target vehicle and the remaining power includes:

[0025] Calculate the driving duration of the target vehicle when the wading depth is greater than the safety depth, expressed as:

[0026] ;

[0027] Wherein, T represents the driving duration, S represents the length of the wading area, and v represents the driving speed of the target vehicle;

[0028] Calculate the energy consumption value required for the target vehicle to pass through the wading area, expressed as:

[0029] ;

[0030] Where W represents the energy consumption value required for the target vehicle to pass through the wading area. represents water density, A represents the cross-sectional area of ​​the target vehicle perpendicular to the direction of motion, represents the drag coefficient of the target vehicle, and v is the speed of the target vehicle.

[0031] As an optional technical solution of the present invention, if the driving duration T of the target vehicle under the condition that the wading depth is greater than the safety depth is less than the safety setting value, and the energy consumption value W required for the target vehicle to pass through the wading area is less than the remaining power, then it is judged that the target vehicle can pass through the wading area, and a prompt is given through the display screen; otherwise, it is judged that the target vehicle cannot pass through the wading area, and an early warning is given through the display screen, and the driving route is replanned.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The new energy vehicle water wading warning system provided by the present invention combines water wading warning with intelligent driving, comprehensively analyzes and judges water wading risks through a data processing unit, and gives the driver reasonable warning reminders on the premise of ensuring the safety of the vehicle itself, so as to assist the driver to safely pass through the water wading area, effectively solve the technical defects of current new energy vehicles in dealing with water wading scenes, extend the service life of the vehicle, and reduce the cost of using the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a structural schematic diagram of a new energy vehicle wading warning system in an embodiment of the present invention;

[0035] Figure 2 is a flow chart of a new energy vehicle wading warning method in an embodiment of the present invention;

[0036] Figure 3 is a schematic diagram of a scene in which there is a moving vehicle in front of the target vehicle in an embodiment of the present invention;

[0037] Figure 4 is a schematic diagram of a scene in which a static reference object exists in front of a target vehicle in an embodiment of the present invention;

[0038] Figure 5 is a schematic diagram of a scenario in which there is no moving vehicle or static reference object in front of the target vehicle in an embodiment of the present invention. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0040] Example 1

[0041] This embodiment provides a new energy vehicle wading warning system, which is applied to a driving scenario in which there is a wading area ahead of the target vehicle.

[0042] like Figure 1 As shown, including:

[0043] The data acquisition unit is used to collect the wading area information in front of the target vehicle and the surrounding environment information. The surrounding environment information includes the height information of the vehicle in front of the target vehicle, the height information of the static reference object in front of the target vehicle, and the depth of the ground depression in front of the target vehicle. The wading area information includes the length of the wading area.

[0044] Furthermore, the data acquisition unit includes a camera and a radar, which are arranged together on the surrounding side of the target vehicle.

[0045] Further, the height information of the vehicle in front of the target vehicle includes the height of the vehicle and the height of the vehicle exposed to the wading area. The height information of the static reference object in front of the target vehicle includes the height of the static reference object and the height of the static reference object exposed to the wading area.

[0046] A water level sensor is used to detect the wading depth of the target vehicle.

[0047] The vehicle speed sensor is used to detect the driving speed of the target vehicle.

[0048] The battery management unit is used to obtain the current remaining power of the target vehicle.

[0049] The display screen is used to indicate whether the target vehicle can pass through the wading area ahead.

[0050] The data processing unit is connected to the data acquisition unit, the water level sensor, the vehicle speed sensor, the battery management unit and the display screen, and is used to judge whether the target vehicle can currently pass through the front wading area according to the front wading area information of the target vehicle and the surrounding environment information, the wading depth of the target vehicle, the driving speed and the remaining power, and send the judgment result to the display screen.

[0051] The navigation and positioning unit is connected to the data processing unit and is used to obtain the current position information of the target vehicle and send it to the data processing unit.

[0052] Example 2

[0053] This embodiment provides an early warning method based on Embodiment 1.

[0054] like Figure 2 As shown, specifically including:

[0055] Step 1: Obtain the wading area information in front of the target vehicle, the surrounding environment information and the wading depth of the target vehicle.

[0056] Step 2: Determine whether there is a moving vehicle or a static reference object in front of the target vehicle based on the surrounding environment information of the target vehicle.

[0057] Step 3: If it exists, the water depth of the wading area is calculated based on the height information of the moving vehicle or the static reference object; if it does not exist, the water depth of the wading area is calculated based on the wading depth of the target vehicle and the depth of the ground depression in front of the target vehicle.

[0058] like Figure 3 As shown in the figure, if there is a moving vehicle in front of the target vehicle, the water depth in the wading area is expressed as:

[0059] ;

[0060] Among them, H represents the water depth of the wading area, Indicates the height of the vehicle. Indicates the height of the moving vehicle above the wading area.

[0061] like Figure 4 As shown in the figure, if there is a static reference object in front of the target vehicle, the water depth in the wading area is expressed as:

[0062] ;

[0063] Among them, H represents the water depth of the wading area, represents the height of the static reference object, Indicates the height of the static reference object above the wading area.

[0064] like Figure 5 As shown in the figure, if there is no moving vehicle or static reference object in front of the target vehicle, the water depth in the wading area is expressed as:

[0065] ;

[0066] Among them, H represents the water depth of the wading area, Indicates the wading depth of the target vehicle, Indicates the depth of the ground depression in front of the target vehicle.

[0067] Step 4: Determine whether the water depth in the wading area is greater than the safe depth. If so, determine whether the target vehicle can pass through the wading area based on the wading area information in front of the target vehicle, the target vehicle's driving speed and the remaining power, and issue a warning prompt through the display screen; if not, prompt the target vehicle through the display screen that it can pass through the wading area.

[0068] Specifically, the driving duration of the target vehicle under the condition that the wading depth is greater than the safety depth is calculated, which is expressed as:

[0069] ;

[0070] Wherein, T represents the driving duration, S represents the length of the wading area, and v represents the driving speed of the target vehicle.

[0071] Calculate the energy consumption value required for the target vehicle to pass through the wading area, expressed as:

[0072] ;

[0073] Where W represents the energy consumption value required for the target vehicle to pass through the wading area. represents water density, A represents the cross-sectional area of ​​the target vehicle perpendicular to the direction of motion, represents the drag coefficient of the target vehicle, and v is the speed of the target vehicle.

[0074] If the driving duration T of the target vehicle when the wading depth is greater than the safety depth is less than the safety setting value, and the energy consumption value W required for the target vehicle to pass through the wading area is less than the remaining power, then it is judged that the target vehicle can pass through the wading area, and a prompt is given through the display screen; otherwise, it is judged that the target vehicle cannot pass through the wading area, and an early warning is given through the display screen, and the driving route is replanned.

[0075] Furthermore, when the water depth in the wading area is greater than the safe depth and the target vehicle can pass through the wading area, the display screen recommends the driving speed and lane to the driver, and displays the system request to control the vehicle for the driver to choose.

[0076] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0077] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0078] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A new energy vehicle wading warning system, characterized in that: include: A data acquisition unit is used to collect information about the wading area in front of the target vehicle and surrounding environment information; wherein the surrounding environment information includes height information of vehicles traveling in front of the target vehicle, height information of static reference objects in front of the target vehicle, and depth of ground depression in front of the target vehicle; A water level sensor for detecting the wading depth of the target vehicle; A vehicle speed sensor, used to detect the driving speed of the target vehicle; A battery management unit, used to obtain the current remaining power of the target vehicle; A display screen is used to indicate whether the target vehicle can pass through the wading area ahead; The data processing unit is connected to the data acquisition unit, the water level sensor, the vehicle speed sensor, the battery management unit and the display screen, and is used to judge whether the target vehicle can currently pass through the front wading area according to the front wading area information of the target vehicle and the surrounding environment information, the wading depth of the target vehicle, the driving speed and the remaining power, and send the judgment result to the display screen.

2. The new energy vehicle wading warning system according to claim 1 is characterized in that: Also includes: The navigation and positioning unit is connected to the data processing unit and is used to obtain the current position information of the target vehicle and send it to the data processing unit.

3. The new energy vehicle wading warning system according to claim 1 is characterized by: The water-wading area information includes the length of the water-wading area.

4. The new energy vehicle wading warning system according to claim 1 is characterized by: The data acquisition unit includes a camera and a radar, which are arranged together on the periphery of the target vehicle.

5. The new energy vehicle wading warning system according to claim 1 is characterized by: The height information of the vehicle in front of the target vehicle includes the height of the vehicle and the height of the vehicle exposed to the wading area; The height information of the static reference object in front of the target vehicle includes the height of the static reference object and the height of the static reference object exposed from the wading area.

6. An early warning method based on the new energy vehicle wading early warning system according to any one of claims 1 to 5, characterized in that: include: Obtaining the wading area information in front of the target vehicle, the surrounding environment information and the wading depth of the target vehicle; Determine whether there is a moving vehicle or a static reference object in front of the target vehicle based on the surrounding environment information of the target vehicle; If present, the water depth of the wading area is calculated using the height information of the moving vehicle or static reference object; If it does not exist, the water depth of the wading area is calculated based on the wading depth of the target vehicle and the depth of the ground depression in front of the target vehicle; Determine whether the water depth in the wading area is greater than the safe depth. If so, determine whether the target vehicle can pass through the wading area based on the wading area information in front of the target vehicle, the target vehicle's driving speed and the remaining power, and issue a warning prompt through the display screen; if not, prompt the target vehicle through the display screen that it can pass through the wading area.

7. The new energy vehicle wading warning method according to claim 6 is characterized in that: If there is a moving vehicle in front of the target vehicle, the water depth in the wading area is expressed as: ； Among them, H represents the water depth of the wading area, Indicates the height of the vehicle. Indicates the height of the moving vehicle above the wading area; If there is a static reference object in front of the target vehicle, the water depth in the wading area is expressed as: ； Among them, H represents the water depth of the wading area, represents the height of the static reference object, Indicates the height of the static reference object above the wading area; If there is no moving vehicle or static reference object in front of the target vehicle, the water depth in the wading area is expressed as: ； Among them, H represents the water depth of the wading area, Indicates the wading depth of the target vehicle, Indicates the depth of the ground depression in front of the target vehicle.

8. The new energy vehicle wading warning method according to claim 6 is characterized in that: The method of judging whether the target vehicle can pass through the wading area based on the wading area information in front of the target vehicle, the driving speed of the target vehicle and the remaining power includes: Calculate the driving duration of the target vehicle when the wading depth is greater than the safety depth, expressed as: ； Wherein, T represents the driving duration, S represents the length of the wading area, and v represents the driving speed of the target vehicle; Calculate the energy consumption value required for the target vehicle to pass through the wading area, expressed as: ； Where W represents the energy consumption value required for the target vehicle to pass through the wading area. represents water density, A represents the cross-sectional area of ​​the target vehicle perpendicular to the direction of motion, represents the drag coefficient of the target vehicle, and v is the speed of the target vehicle.

9. The new energy vehicle wading warning method according to claim 8, characterized in that: If the target vehicle's driving duration T is less than the safety setting value when the wading depth is greater than the safety depth, and the energy consumption value W required for the target vehicle to pass through the wading area is less than the remaining power, it is determined that the target vehicle can pass through the wading area, and a prompt is given through the display screen; Otherwise, it is determined that the target vehicle cannot pass through the wading area, and an early warning is issued through the display screen, and the driving route is replanned.

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