Vehicle sand protection control method and device and vehicle

Abstract

The invention is suitable for the technical field of vehicles, and provides a vehicle sand protection control method and device and a vehicle. The method comprises the steps that after it is detected that a vehicle enters a sand area, a fan is controlled to rotate at a first rotating speed; wherein the first rotating speed is greater than a preset rotating speed; detecting whether the fan rotates abnormally; if the fan rotates abnormally, the fan is controlled to rotate at a second rotating speed; wherein the second rotating speed is smaller than the first rotating speed; if the fan rotates normally, the fan is controlled to continuously rotate at the first rotating speed, and the step of detecting whether the fan rotates abnormally or not is executed again after a preset time period until the vehicle leaves the sand area. After a vehicle enters a sand area, the situation that parts of the fan are damaged and fall off due to sand attachment can be prevented, vehicle driving is not affected, and safety problems are reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a vehicle sand protection control method, device and vehicle. Background Art

[0002] As the functions of vehicles increase, many vehicles have certain desert off-road functions. When vehicles are off-road in the desert, they cross the sand for a long distance and the driving environment is harsh, and the rotating parts in the vehicle, such as the cooling fan used to dissipate heat from the engine, will be filled with sand.

[0003] When rotating parts such as fans are covered with a lot of sand, their own running resistance will increase or their balance will be restricted, and they may even cause their own parts to be damaged or fall off, affecting vehicle driving and causing safety problems. Summary of the invention

[0004] In view of this, the embodiments of the present application provide a vehicle sand protection control method, device and vehicle to solve the technical problem that when the vehicle is off-roading in the desert, the vehicle fan is covered with a lot of sand, causing itself to be abnormal or damaged, thereby affecting the vehicle's driving.

[0005] In a first aspect, an embodiment of the present application provides a vehicle sand protection control method, comprising:

[0006] After detecting that the vehicle has entered a sandy area, the fan is controlled to rotate at a first speed; wherein the first speed is greater than a preset speed;

[0007] Detecting whether the fan rotates abnormally;

[0008] If the fan rotates abnormally, controlling the fan to rotate at a second speed; wherein the second speed is lower than the first speed;

[0009] If the fan rotates normally, the fan is controlled to continue rotating at the first speed, and the step of detecting whether the fan rotates abnormally is re-executed after a preset time period until the vehicle leaves the sandy area.

[0010] In a possible implementation manner of the first aspect, after the fan rotates normally and the vehicle leaves the sandy area, the method further includes:

[0011] After controlling the fan to rotate for a first preset time based on the idle speed, controlling the fan to rotate for a second preset time based on a third speed to perform self-cleaning; the third speed is greater than the idle speed;

[0012] The steps of controlling the fan to rotate for a first preset time based on the idle speed and then controlling the fan to rotate for a second preset time based on the third speed are repeatedly performed until the number of repetitions reaches a preset number, and self-cleaning is stopped.

[0013] In a possible implementation of the first aspect, the method further includes:

[0014] In the process of controlling the fan to rotate for a second preset time based on the third speed, detecting whether the maximum speed of the fan is less than the third speed, and detecting whether the time required for the fan speed to reach the third speed is greater than the third preset time;

[0015] If the maximum rotation speed of the fan is lower than the third rotation speed, or the time required for the rotation speed of the fan to reach the third rotation speed is longer than the third preset time, an abnormal alarm is issued.

[0016] In a possible implementation manner of the first aspect, the second speed includes multiple speeds;

[0017] Before controlling the fan to rotate at the second speed, the method further includes:

[0018] Obtaining the degree of abnormal rotation of the fan;

[0019] The second rotation speed is determined according to the degree of abnormal rotation of the fan; wherein the second rotation speed is negatively correlated with the degree of abnormal rotation of the fan, and the second rotation speed is greater than or equal to the idle speed.

[0020] In a possible implementation manner of the first aspect, detecting whether the rotation of the fan is abnormal includes:

[0021] Detecting whether the dynamic balance of the fan is abnormal, and detecting whether the rotation angular velocity of the fan is abnormal;

[0022] If the dynamic balance of the fan is abnormal, or the rotation angular velocity of the fan is abnormal, it is determined that the fan rotates abnormally.

[0023] In a possible implementation manner of the first aspect, detecting whether the dynamic balance of the fan is abnormal and detecting whether the rotation angular velocity of the fan is abnormal include:

[0024] Detecting whether the rotation speed of the fan is outside a preset rotation speed range, and if the rotation speed is outside the preset rotation speed range, determining that the dynamic balance of the fan is abnormal;

[0025] It is detected whether the rotation angular velocity of the fan is outside a preset angular velocity range. If the rotation angular velocity of the fan is outside the preset angular velocity range, it is determined that the rotation angular velocity of the fan is abnormal.

[0026] In a possible implementation of the first aspect, detecting whether the vehicle enters a sandy area includes:

[0027] detecting whether the driving mode of the vehicle is a sand mode, and if the driving mode is a sand mode, determining that the vehicle has entered a sand area;

[0028] Alternatively, detecting whether the vehicle is located in a preset sandy area, and if the vehicle is located in the preset sandy area, determining that the vehicle has entered the sandy area;

[0029] Alternatively, an image of the surrounding environment of the vehicle is acquired, and it is detected whether there is a sandy scene in the surrounding environment image. If there is a sandy scene in the surrounding environment image, it is determined that the vehicle has entered a sandy area.

[0030] In a possible implementation manner of the first aspect, controlling the fan to rotate at a first speed includes:

[0031] Obtaining a standard rotation speed of a fan corresponding to the sand area;

[0032] Obtaining a first speed according to the sum of the standard speed and the additional speed;

[0033] Based on the first rotation speed, the fan is controlled to rotate.

[0034] In a second aspect, an embodiment of the present application provides a vehicle sand protection control device, comprising:

[0035] A first control module, configured to control the fan to rotate at a first speed after detecting that the vehicle has entered a sandy area; wherein the first speed is greater than a preset speed;

[0036] A detection module, used to detect whether the fan rotates abnormally;

[0037] A second control module, used for controlling the fan to rotate at a second speed when the fan rotates abnormally; wherein the second speed is lower than the first speed;

[0038] The third control module is used to control the fan to continue rotating at the first speed when the fan rotates normally, and to re-execute the step of detecting whether the fan rotates abnormally after a preset time period until the vehicle leaves the sandy area.

[0039] In a possible implementation manner of the second aspect, after the fan rotates normally and the vehicle leaves the sandy area, the third control module is further configured to:

[0040] After controlling the fan to rotate for a first preset time based on the idle speed, controlling the fan to rotate for a second preset time based on a third speed to perform self-cleaning; the third speed is greater than the idle speed;

[0041] The steps of controlling the fan to rotate for a first preset time based on the idle speed and then controlling the fan to rotate for a second preset time based on the third speed are repeatedly performed until the number of repetitions reaches a preset number, and self-cleaning is stopped.

[0042] In a possible implementation manner of the second aspect, the third control module is further configured to:

[0043] In the process of controlling the fan to rotate for a second preset time based on the third speed, detecting whether the maximum speed of the fan is less than the third speed, and detecting whether the time required for the fan speed to reach the third speed is greater than the third preset time;

[0044] If the maximum rotation speed of the fan is lower than the third rotation speed, or the time required for the rotation speed of the fan to reach the third rotation speed is longer than the third preset time, an abnormal alarm is issued.

[0045] In a possible implementation manner of the second aspect, the second speed includes a plurality of speeds; and the second control module is further configured to:

[0046] Obtaining the degree of abnormal rotation of the fan;

[0047] The second rotation speed is determined according to the degree of abnormal rotation of the fan; wherein the second rotation speed is negatively correlated with the degree of abnormal rotation of the fan, and the second rotation speed is greater than or equal to the idle speed.

[0048] In a possible implementation manner of the second aspect, the detection module is further used to:

[0049] Detecting whether the dynamic balance of the fan is abnormal and whether the rotation angular velocity of the fan is abnormal;

[0050] If the dynamic balance of the fan is abnormal, or the rotation angular velocity of the fan is abnormal, it is determined that the fan rotates abnormally.

[0051] In a possible implementation manner of the second aspect, the detection module is further used to:

[0052] Detecting whether the rotation speed of the fan is outside a preset rotation speed range, and if the rotation speed is outside the preset rotation speed range, determining that the dynamic balance of the fan is abnormal;

[0053] It is detected whether the rotation angular velocity of the fan is outside a preset angular velocity range. If the rotation angular velocity of the fan is outside the preset angular velocity range, it is determined that the rotation angular velocity of the fan is abnormal.

[0054] In a possible implementation manner of the second aspect, the first control module is further configured to:

[0055] detecting whether the driving mode of the vehicle is a sand mode, and if the driving mode is a sand mode, determining that the vehicle has entered a sand area;

[0056] Alternatively, detecting whether the vehicle is located in a preset sandy area, and if the vehicle is located in the preset sandy area, determining that the vehicle has entered the sandy area;

[0057] Alternatively, an image of the surrounding environment of the vehicle is acquired, and it is detected whether there is a sandy scene in the surrounding environment image. If there is a sandy scene in the surrounding environment image, it is determined that the vehicle has entered a sandy area.

[0058] In a possible implementation manner of the second aspect, the first control module is further configured to:

[0059] Obtaining a standard rotation speed of a fan corresponding to the sand area;

[0060] Obtaining a first speed according to the sum of the standard speed and the additional speed;

[0061] Based on the first rotation speed, the fan is controlled to rotate.

[0062] In a third aspect, an embodiment of the present application provides a vehicle, including a memory and a controller, wherein the memory stores a computer program that can be run on the controller, and when the controller executes the computer program, the vehicle sand protection control method as described in any one of the first aspects is implemented.

[0063] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a controller, the vehicle sand protection control method as described in any one of the first aspects is implemented.

[0064] It can be understood that the beneficial effects of the second to fourth aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here.

[0065] The vehicle sand protection control method, device and vehicle provided in the embodiments of the present application first speed up the fan after detecting that the vehicle has entered a sandy area, and control the fan to rotate at a higher first speed to prevent sand from covering the fan. Thereafter, detect whether the fan rotation is abnormal. When abnormal fan rotation is detected, it indicates that the fan's own balance is limited or the running resistance is increased due to the adhesion of external sand. At this time, the fan speed is reduced and the fan is controlled to rotate at a second speed to protect the fan and cabin-related components from damage. When it is detected that the fan rotation is normal, the fan is controlled to continue to maintain the first speed to prevent sand from covering the fan, and the fan rotation is continuously detected to see if it is abnormal until the vehicle leaves the sandy area. In this way, the fan can be prevented from being damaged or falling off due to the adhesion of sand, without affecting the vehicle's driving and reducing the occurrence of safety problems.

[0066] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0068] Figure 1 It is a schematic diagram of an application scenario provided by an embodiment of the present application;

[0069] Figure 2 It is a flow chart of a vehicle sand protection control method provided by an embodiment of the present application;

[0070] Figure 3 is a flow chart of a vehicle sand protection control method provided by another embodiment of the present application;

[0071] Figure 4 is a flow chart of a vehicle sand protection control method provided by another embodiment of the present application;

[0072] Figure 5 It is a structural schematic diagram of a vehicle sand protection control device provided by an embodiment of the present application;

[0073] Figure 6 It is a schematic diagram of the structure of a vehicle provided in one embodiment of the present application. DETAILED DESCRIPTION

[0074] The present application is described more clearly below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the effects of the present application, but are not intended to limit the present application in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present application. These all fall within the scope of protection of the present application.

[0075] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0076] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0077] In the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0078] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0079] In addition, the “plurality” mentioned in the embodiments of the present application should be interpreted as two or more.

[0080] When a vehicle is off-roading in the desert, rotating parts such as fans in the vehicle will be covered with a lot of sand, which will increase their own running resistance or limit their balance, and even cause their own parts to be damaged or fall off, affecting the vehicle's driving and causing safety problems.

[0081] Based on the above problems, the inventors have discovered that after the vehicle enters a sandy area, the fan can be first controlled to rotate at a first speed to prevent sand from covering the fan. Afterwards, the fan rotation is detected to be abnormal. When abnormal fan rotation is detected, it means that the fan's own balance is limited or the operating resistance is increased due to the adhesion of foreign sand. At this time, the fan speed is reduced to rotate at a second speed to protect the fan and cabin components. When normal fan rotation is detected, it means that the fan is not affected by the sand or is very little affected by the sand. At this time, the fan is controlled to continue to rotate at the first speed to prevent sand from covering the fan. The fan rotation is continuously detected to see if it is abnormal until the vehicle leaves the sandy area. In this way, it can be avoided that the fan's own components are damaged due to the influence of sand, thereby affecting the vehicle's driving.

[0082] In order to make the purpose, technical solutions and advantages of the present invention more clear, specific embodiments will be described below in conjunction with the accompanying drawings.

[0083] First reference Figure 1 , Figure 1 An application scenario of the present application is schematically shown, in which a vehicle, a controller and a fan are included.

[0084] After detecting that the vehicle has entered a sandy area, the controller controls the fan to rotate at a first speed, and then detects whether the fan rotation is abnormal. If the fan rotation is abnormal, the controller controls the fan to rotate at a second speed. If the fan rotation is normal, the controller controls the fan to continue to rotate at the first speed, and re-executes the step of detecting whether the fan rotation is abnormal after a preset time period until the vehicle leaves the sandy area.

[0085] The first rotation speed is greater than a preset rotation speed, and the second rotation speed is less than the first rotation speed.

[0086] Optionally, the controller may be a hardware device with data storage, processing and analysis functions, such as an electronic control unit (ECU) or a hybrid control unit (HCU).

[0087] The above application scenarios may also include a speed sensor and an angular velocity sensor, etc. The speed sensor obtains the fan speed and sends it to the controller, and the angular velocity sensor obtains the fan rotation angular velocity and sends it to the controller. The controller detects whether the fan rotation is abnormal based on the obtained fan speed or rotation angular velocity.

[0088] Combine the following Figure 1 ,refer to Figure 2-Figure 3The vehicle sand protection control method provided according to the exemplary embodiment of the present application is described. It should be noted that the above application scenarios are only shown to facilitate understanding of the spirit and principle of the present application, and the embodiments of the present application are not limited in this respect. On the contrary, the embodiments of the present application can be applied to any applicable scenario.

[0089] Figure 2 FIG. 1 is a flow chart of a vehicle sand protection control method provided by an embodiment of the present application. Figure 2 As shown, the method in the embodiment of the present application may include:

[0090] Step 201: After detecting that the vehicle enters a sandy area, control the fan to rotate at a first speed.

[0091] In this embodiment, the fan is a cooling fan for cooling the engine or other heat generating components. After detecting that the vehicle has entered a sandy area, in order to prevent sand from covering the fan, the fan speed can be increased, that is, the fan is controlled to rotate at a first speed, wherein the first speed is greater than a preset speed.

[0092] Here, the preset speed may be the speed after the fan is accelerated when the vehicle enters the sandy area, for example, the standard speed of the fan corresponding to the sandy mode of the vehicle. When the fan rotates at the standard speed, it can just meet the heat dissipation requirements of the corresponding engine or other heat-generating components in the sandy mode.

[0093] In this embodiment, the fan is controlled to rotate at a higher first speed than a preset speed, which can prevent sand from covering the fan and at the same time improve the heat dissipation redundancy, which is conducive to better heat dissipation of the corresponding engine or other heat-generating components.

[0094] In some embodiments, when detecting whether the vehicle enters a sandy area, it may be detected whether the driving mode of the vehicle is a sandy mode. If the driving mode is a sandy mode, it is determined that the vehicle enters a sandy area.

[0095] Alternatively, it is detected whether the vehicle is located in a preset sandy area, and if the vehicle is located in the preset sandy area, it is determined that the vehicle has entered the sandy area.

[0096] Alternatively, an image of the surrounding environment of the vehicle is acquired to detect whether there is a sandy scene in the surrounding environment image. If there is a sandy scene in the surrounding environment image, it is determined that the vehicle has entered a sandy area.

[0097] Optionally, when the driving mode of the vehicle is detected as sand mode in the present embodiment, it indicates that the vehicle enters the sand area at this time, and the driving mode of the vehicle is automatically switched to the sand mode by manual or vehicle controller. In the present embodiment, the positioning of the vehicle can also be obtained in real time, and it is judged whether the vehicle is in the preset sand area according to the positioning of the vehicle, for example, the GPS positioning of the vehicle is obtained, and when the GPS positioning of the vehicle is in the preset sand area calibrated by GPS, it indicates that the vehicle enters the sand area. The present embodiment can also set a preset distance, such as the preset distance is 100 meters, when the GPS positioning of the vehicle is 100 meters away from the boundary of the preset sand area calibrated by GPS, it indicates that the vehicle is about to enter the sand area, and the fan can be controlled to rotate at a first speed at this time, that is, the fan is controlled in advance to achieve a better fan sand clearing effect and better protect the fan.

[0098] For example, the embodiment can also obtain the vehicle's surrounding environment image in real time, for example, by using a vehicle-mounted camera to obtain the vehicle's surrounding environment image, and perform scene recognition on the surrounding environment image. If a sand scene is recognized in the surrounding environment image, it indicates that the vehicle has entered a sandy area.

[0099] In some embodiments, when controlling the fan to rotate at a first speed, the standard speed of the fan corresponding to the sandy area can be obtained, and the first speed is obtained based on the sum of the standard speed and the additional speed, and the fan is controlled to rotate based on the first speed.

[0100] Exemplarily, the standard speed of the fan corresponding to the sand area can be the standard speed of the fan corresponding to the sand mode of the vehicle, and the additional speed can be set as needed so that when the fan rotates at the sum of the standard speed and the additional speed, it can effectively prevent sand from covering the fan and increase heat dissipation redundancy. For example, the additional speed can be set to 500rpm.

[0101] Step 202: Detect whether the fan rotation is abnormal.

[0102] After the fan is controlled to rotate at the first speed, although the speed can be increased to prevent certain sand from sticking to the fan, in order to further protect the fan and related parts and prevent the sand from affecting the operation of the fan and damaging the parts after the fan is covered with sand, the present embodiment can timely detect whether the fan is rotating abnormally. When abnormal fan rotation is detected, it indicates that the fan may be limited in its own balance or increase in operating resistance due to the attachment of foreign sand, and the fan should be controlled in time.

[0103] In some embodiments, when detecting whether the fan rotation is abnormal, it is possible to detect whether the fan dynamic balance is abnormal and whether the fan rotation angular velocity is abnormal, and when the fan dynamic balance is abnormal or the fan rotation angular velocity is abnormal, it is determined that the fan rotation is abnormal.

[0104] Exemplarily, in this embodiment, it is possible to detect whether the fan speed is outside a preset speed range. If the speed is outside the preset speed range, it is determined that the fan dynamic balance is abnormal. It is also possible to detect whether the fan rotation angular velocity is outside a preset angular velocity range. If the fan rotation angular velocity is outside the preset angular velocity range, it is determined that the fan rotation angular velocity is abnormal.

[0105] In this embodiment, when the fan speed does not conform to the preset speed range, or the fan rotation angular velocity does not conform to the preset angular velocity range, it indicates that the fan has abnormal dynamic balance or increased stress due to the adhesion of foreign sand particles, and the fan rotation is abnormal. The preset speed range and the preset angular velocity range can be set as needed, for example, the preset speed and the preset angular velocity can be set according to the first speed.

[0106] Step 203: If the fan rotates abnormally, control the fan to rotate at a second speed; wherein the second speed is lower than the first speed.

[0107] In this embodiment, when abnormal fan rotation is detected, it indicates that the fan cannot work normally because its own balance is limited or the running resistance is increased due to the adhesion of foreign sand particles. At this time, in order to protect the fan and related parts in the cabin and prevent the fan from being damaged or falling off due to the adhesion of sand particles, thereby affecting the driving of the vehicle, the fan speed should be controlled to be reduced, for example, the fan should be controlled to rotate at a second speed, which can be an idle speed.

[0108] In this way, reducing the fan speed, for example, controlling the fan speed to idle speed, can effectively protect the fan and related components in the cabin from damage, thereby preventing the occurrence of safety problems.

[0109] It should be noted that after abnormal fan rotation is detected and the fan is controlled to rotate at the second speed, if the vehicle leaves the sandy area, the fan can be controlled to continue to rotate at the second speed or other lower speed to protect the fan and related components in the cabin.

[0110] Step 204: If the fan rotates normally, the fan is controlled to continue rotating at the first speed, and the step of detecting whether the fan rotates abnormally is re-executed after a preset time period, until the vehicle leaves the sandy area.

[0111] In this embodiment, when it is detected that the fan is rotating normally, it means that the sand is not or less attached to the fan at this time, and the fan is not affected by the sand or is slightly affected by the sand. At this time, the fan is maintained to continue to rotate at a higher first speed to prevent the sand from covering the fan. At the same time, before the vehicle leaves the sandy area, it is continuously detected whether the fan rotates abnormally, such as re-detecting whether the fan rotates abnormally after each preset time period. In this way, when the fan rotates abnormally, it can be detected in time, so that corresponding control is performed later to protect the fan and related components in the cabin.

[0112] The vehicle sand protection control method provided in the embodiment of the present application first speeds up the fan after the vehicle enters the sand area, and controls the fan to rotate at a higher first speed to prevent sand from covering the fan. Thereafter, it detects whether the fan rotation is abnormal. When it is detected that the fan rotation is abnormal, it means that the fan's own balance is limited or the running resistance is increased due to the adhesion of foreign sand. At this time, the fan speed is reduced and the fan is controlled to rotate at a second speed to protect the fan and cabin-related components from damage. When it is detected that the fan rotation is normal, the fan is controlled to continue to maintain the first speed to prevent sand from covering the fan, and the fan rotation is continuously detected to see if it is abnormal until the vehicle leaves the sand area. In this way, the fan can be prevented from being damaged or falling off due to the adhesion of sand, without affecting the vehicle's driving and reducing the occurrence of safety problems.

[0113] In some embodiments, in order to further prevent sand from adhering to the fan, a sand-proof net may be provided outside the fan, and the sand-proof net may surround or semi-surround the fan to prevent sand from adhering to the fan.

[0114] Optionally, as can be seen from the above, when abnormal fan rotation is detected, the fan speed is controlled to be reduced so that the fan rotates at the second speed. Here, in order to reduce the impact of reducing the fan speed on vehicle driving, the second speed can also be determined according to the abnormal degree of fan rotation.

[0115] Figure 3 FIG. 2 is a flow chart of a vehicle sand protection control method provided by another embodiment of the present application. Figure 3 As shown, the method in the embodiment of the present application may include:

[0116] Step 301: After detecting that the vehicle enters a sandy area, control the fan to rotate at a first speed.

[0117] For example, after detecting that the vehicle has entered a sandy area, in order to prevent sand from covering the fan, the fan speed may be increased, that is, the fan may be controlled to rotate at a first speed, wherein the first speed is greater than a preset speed.

[0118] Here, the preset speed may be the speed after the vehicle enters a sandy area and the fan is accelerated, for example, it may be the standard speed of the fan corresponding to the sandy mode of the vehicle.

[0119] Step 302: Detect whether the fan rotation is abnormal.

[0120] Exemplarily, it is possible to detect whether the dynamic balance of the fan is abnormal and whether the rotational angular speed of the fan is abnormal, and when the dynamic balance of the fan is abnormal or the rotational angular speed of the fan is abnormal, it is determined that the fan rotation is abnormal.

[0121] Step 303: If the fan rotates abnormally, the degree of abnormal rotation of the fan is obtained, a second rotation speed is determined according to the degree of abnormal rotation of the fan, and the fan is controlled to rotate at the second rotation speed.

[0122] The second speed includes a plurality of speeds, and the second speed is less than the first speed. Also, the second speed is negatively correlated with the degree of abnormal rotation of the fan, and the second speed is greater than or equal to the idle speed.

[0123] Correspondingly, when abnormal rotation of the fan is detected, the degree of abnormal rotation of the fan can also be determined.

[0124] Exemplarily, after detecting that the speed of the fan is outside the preset speed range, this embodiment further detects the speed range interval in which the speed of the fan is located. For example, the speed range interval is divided into multiple sub-speed intervals, and different sub-speed intervals correspond to different degrees of abnormal fan rotation. The lower the upper limit value of the sub-speed interval, the greater the corresponding degree of abnormal fan rotation. Thus, the degree of abnormal fan rotation can be determined based on the sub-speed interval in which the speed of the fan is located. The second speed is negatively correlated with the degree of abnormal fan rotation. The greater the degree of abnormal fan rotation, the lower the second speed.

[0125] For example, if it is detected that the fan speed is in a certain sub-speed range for a long time, the degree of fan rotation abnormality corresponding to the sub-speed range is used as the current degree of fan rotation abnormality. Then, based on the correspondence between the degree of fan rotation abnormality and the second speed, the second speed is determined, and the fan is controlled to rotate at the second speed.

[0126] Similarly, after detecting that the rotational angular velocity of the fan is outside the preset angular velocity range, this embodiment further detects the angular velocity range interval in which the rotational angular velocity of the fan is located. For example, the angular velocity range interval is divided into a plurality of sub-angular velocity intervals, and different sub-angular velocity intervals correspond to different degrees of abnormal fan rotation. The lower the upper bound value of the sub-angular velocity interval, the greater the corresponding degree of abnormal fan rotation. Thus, the degree of abnormal fan rotation can be determined based on the sub-angular velocity interval in which the rotational angular velocity of the fan is located. The second rotation speed is negatively correlated with the degree of abnormal fan rotation. The greater the degree of abnormal fan rotation, the lower the second rotation speed.

[0127] Thus, after detecting abnormal rotation of the fan, the embodiment determines the second rotation speed according to the degree of abnormal rotation of the fan, and the second rotation speed is negatively correlated with the degree of abnormal rotation of the fan, thereby reducing the impact of reducing the fan rotation speed on vehicle driving.

[0128] It should be noted that if the abnormality of the fan rotation determined based on the fan rotation speed is different from the abnormality of the fan rotation determined based on the fan rotation angular velocity, the larger abnormality of the two is used as the abnormality of the fan rotation.

[0129] Step 304: If the fan rotates normally, the fan is controlled to continue rotating at the first speed, and the step of detecting whether the fan rotates abnormally is re-executed after a preset time period, until the vehicle leaves the sandy area.

[0130] The specific implementation process and principle of steps 301 to 302 and step 304 in this embodiment can refer to the relevant description in the above embodiments, which will not be repeated here.

[0131] In this embodiment, when abnormal rotation of the fan is detected, a second rotation speed is determined according to the degree of abnormal rotation of the fan, and the fan is controlled to rotate at the second rotation speed, thereby reducing the impact of reducing the fan rotation speed on vehicle driving.

[0132] Optionally, when the vehicle finishes driving on the sand and leaves the sandy area, the fan may be controlled to perform self-cleaning in order to reduce the impact of sand on the fan and keep the fan in an optimal working state.

[0133] Figure 4 FIG. 2 is a flow chart of a vehicle sand protection control method provided by another embodiment of the present application. Figure 4 As shown, the method in the embodiment of the present application may include:

[0134] Step 401: After detecting that the vehicle enters a sandy area, control the fan to rotate at a first speed.

[0135] For example, after detecting that the vehicle has entered a sandy area, the fan speed can be increased to prevent sand from covering the fan, that is, the fan is controlled to rotate at a first speed, wherein the first speed is greater than a preset speed. Here, the preset speed can be the speed after the vehicle enters the sandy area and the fan speed is increased, for example, it can be the standard speed of the fan corresponding to the sandy mode.

[0136] In this embodiment, the fan is controlled to rotate at a higher first speed than a preset speed, which can prevent sand from covering the fan and at the same time improve the heat dissipation redundancy, which is conducive to better heat dissipation of the corresponding engine or other heat-generating components.

[0137] Step 402: Detect whether the fan rotation is abnormal.

[0138] After the fan is controlled to rotate at the first speed, although the speed can be increased to prevent certain sand from sticking to the fan, in order to further protect the fan and related parts and prevent the fan from being covered with sand, the sand may affect the operation of the fan and damage the parts, and the fan rotation may be detected in time. When abnormal fan rotation is detected, it indicates that the fan may be limited in its own balance or increase in operating resistance due to the attachment of foreign sand, and the fan should be controlled in time.

[0139] Step 403: If the fan rotates abnormally, control the fan to rotate at a second speed; wherein the second speed is lower than the first speed.

[0140] For example, when abnormal fan rotation is detected, it indicates that the fan cannot work normally because its own balance is limited or the running resistance is increased due to the adhesion of foreign sand. At this time, in order to protect the fan and related parts in the cabin and prevent the fan from being damaged or falling off due to the adhesion of sand, thereby affecting the driving of the vehicle, the fan speed should be controlled to be reduced, for example, the fan should be controlled to rotate at a second speed, which can be an idle speed.

[0141] Step 404: If the fan rotates normally, the fan is controlled to continue rotating at the first speed, and the step of detecting whether the fan rotates abnormally is re-executed after a preset time period, until the vehicle leaves the sandy area.

[0142] Exemplarily, when it is detected that the fan is rotating normally, it means that the sand is not covering or is less covering the fan, and the fan is not affected by the sand or is very little affected by the sand. At this time, the fan is maintained to continue rotating at a higher first speed to prevent the sand from covering the fan.

[0143] At the same time, it can continuously detect whether the fan rotation is abnormal.

[0144] The specific implementation process and principle of steps 401 to 404 in this embodiment can refer to the relevant description in the above embodiments, which will not be repeated here.

[0145] Step 405: After the fan rotates normally and the vehicle leaves the sandy area, the fan is controlled to rotate at different speeds for self-cleaning.

[0146] Optionally, in this embodiment, the vehicle leaves the sandy area, which means that the vehicle leaves the sandy area when it is detected that the fan is rotating normally. After the vehicle leaves the sandy area, the fan can be controlled to rotate at two speeds, fast and slow. For example, the fan is first controlled to rotate at a slow speed, and then the fan is controlled to rotate at a fast speed, so that the fan can shake off the sand on its surface to achieve self-cleaning. Alternatively, the fan can be controlled to rotate at different speeds of fast, medium, slow, or more levels.

[0147] Exemplarily, when detecting whether the vehicle has left the sandy area, this embodiment may detect whether the driving mode of the vehicle is the sandy mode, and if the driving mode is not the sandy mode, it is determined that the vehicle has left the sandy area. It may also detect whether the vehicle is located in a preset sandy area, and if the vehicle is not located in the preset sandy area, it is determined that the vehicle has left the sandy area. It may also acquire an image of the surrounding environment of the vehicle, detect whether there is a sandy scene in the surrounding environment image, and if there is no sandy scene in the surrounding environment image, it is determined that the vehicle has left the sandy area.

[0148] In some embodiments, when controlling the fan to rotate at different speeds, the fan can be controlled to rotate for a first preset time based on the idle speed, and then controlled to rotate for a second preset time based on the third speed. The step of controlling the fan to rotate for a first preset time based on the idle speed and then controlling the fan to rotate for a second preset time based on the third speed is repeated until the number of repetitions reaches a preset number and self-cleaning stops.

[0149] The third speed is greater than the idle speed. For example, the third speed may be a standard speed corresponding to the fan in the current mode of the vehicle.

[0150] For example, the fan is controlled to rotate at a slower idle speed and a faster third speed respectively, so that the fan can shake off the fine sand particles adhering to its surface and achieve self-cleaning. Furthermore, the above steps of controlling the fan to rotate at the idle speed first and then at the third speed can be repeated for a preset number of times to achieve a better fan self-cleaning effect and shake off all the sand particles adhering to the fan surface as much as possible.

[0151] In some embodiments, during the process of controlling the fan to rotate for a second preset time based on a third speed, it is also possible to detect whether the maximum speed of the fan is less than the third speed, and whether the time required for the fan speed to reach the third speed is greater than the third preset time. If the maximum speed of the fan is less than the third speed, or the time required for the fan speed to reach the third speed is greater than the third preset time, an abnormal alarm is issued.

[0152] In this embodiment, when the fan is controlled to perform self-cleaning, specifically when the fan is controlled to rotate at a third speed for a second preset time, if the fan speed cannot reach the third speed, or the fan speed can reach the third speed but the time required to reach the third speed is greater than the third preset time, and the third preset time is less than the second preset time, then it means that the fan rotation is abnormal at this time, and the control abnormality alarm is prompted to remind the occupants in the vehicle.

[0153] In this embodiment, after the vehicle finishes driving on the sand and leaves the sandy area, in order to reduce the impact of sand on the fan and keep the fan in the best working condition, the fan can be controlled to rotate at different speeds to throw off the sand covering the fan surface.

[0154] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0155] Figure 5 Schematic diagram of the structure of a vehicle sand protection control device provided by an embodiment of the present application. Figure 5 As shown, the vehicle sand protection control device provided in this embodiment may include: a first control module 501 , a detection module 502 , a second control module 503 and a third control module 504 .

[0156] The first control module 501 is used to control the fan to rotate at a first speed after detecting that the vehicle enters a sandy area; wherein the first speed is greater than a preset speed.

[0157] The detection module 502 is used to detect whether the fan rotates abnormally.

[0158] The second control module 503 is used to control the fan to rotate at a second speed when the fan rotates abnormally; wherein the second speed is lower than the first speed.

[0159] The third control module 504 is used to control the fan to continue rotating at the first speed when the fan rotates normally, and to re-execute the step of detecting whether the fan rotates abnormally after a preset time period until the vehicle leaves the sandy area.

[0160] Optionally, after the fan rotates normally and the vehicle leaves the sandy area, the third control module 504 is further configured to:

[0161] After controlling the fan to rotate for a first preset time based on the idle speed, controlling the fan to rotate for a second preset time based on a third speed to perform self-cleaning; the third speed is greater than the idle speed;

[0162] The steps of controlling the fan to rotate for a first preset time based on the idle speed and then controlling the fan to rotate for a second preset time based on the third speed are repeatedly performed until the number of repetitions reaches a preset number, and self-cleaning is stopped.

[0163] Optionally, the third control module 504 is further configured to:

[0164] In the process of controlling the fan to rotate for a second preset time based on the third speed, detecting whether the maximum speed of the fan is less than the third speed, and detecting whether the time required for the fan speed to reach the third speed is greater than the third preset time;

[0165] If the maximum rotation speed of the fan is lower than the third rotation speed, or the time required for the rotation speed of the fan to reach the third rotation speed is longer than the third preset time, an abnormal alarm is issued.

[0166] Optionally, the second speed includes a plurality of speeds; before controlling the fan to rotate at the second speed, the second control module 503 is further configured to:

[0167] Obtaining the degree of abnormal rotation of the fan;

[0168] The second rotation speed is determined according to the degree of abnormal rotation of the fan; wherein the second rotation speed is negatively correlated with the degree of abnormal rotation of the fan, and the second rotation speed is greater than or equal to the idle speed.

[0169] Optionally, the detection module 502 is further configured to:

[0170] Detecting whether the dynamic balance of the fan is abnormal and whether the rotation angular velocity of the fan is abnormal;

[0171] If the dynamic balance of the fan is abnormal, or the rotation angular velocity of the fan is abnormal, it is determined that the fan rotates abnormally.

[0172] Optionally, the detection module 502 is further configured to:

[0173] Detecting whether the rotation speed of the fan is outside a preset rotation speed range, and if the rotation speed is outside the preset rotation speed range, determining that the dynamic balance of the fan is abnormal;

[0174] It is detected whether the rotation angular velocity of the fan is outside a preset angular velocity range. If the rotation angular velocity of the fan is outside the preset angular velocity range, it is determined that the rotation angular velocity of the fan is abnormal.

[0175] Optionally, the first control module 501 is further used for:

[0176] detecting whether the driving mode of the vehicle is a sand mode, and if the driving mode is a sand mode, determining that the vehicle has entered a sand area;

[0177] Alternatively, detecting whether the vehicle is located in a preset sandy area, and if the vehicle is located in the preset sandy area, determining that the vehicle has entered the sandy area;

[0178] Alternatively, an image of the surrounding environment of the vehicle is acquired, and it is detected whether there is a sandy scene in the surrounding environment image. If there is a sandy scene in the surrounding environment image, it is determined that the vehicle has entered a sandy area.

[0179] Optionally, the first control module 501 is further used for:

[0180] Obtaining a standard rotation speed of a fan corresponding to the sand area;

[0181] Obtaining a first speed according to the sum of the standard speed and the additional speed;

[0182] Based on the first rotation speed, the fan is controlled to rotate.

[0183] It should be noted that the information interaction, execution process, etc. between the above-mentioned devices / units are based on the same concept as the method embodiment of the present application. Their specific functions and technical effects can be found in the method embodiment part and will not be repeated here.

[0184] Figure 6 Schematic diagram of the structure of a vehicle provided by an embodiment of the present application. Figure 6 As shown, the vehicle 600 of this embodiment includes: a controller 610 and a memory 620, wherein the memory 620 stores a computer program 621 that can be run on the controller 610. When the controller 610 executes the computer program 621, the steps in any of the above-mentioned method embodiments are implemented, for example Figure 2 Alternatively, the controller 610 implements the functions of each module / unit in the above-mentioned device embodiments when executing the computer program 621, for example Figure 5 Functions of modules 501 to 504 are shown.

[0185] Exemplarily, the computer program 621 may be divided into one or more modules / units, one or more modules / units are stored in the memory 620 and executed by the controller 610 to complete the present application. The one or more modules / units may be a series of computer program instruction segments capable of completing specific functions, and the instruction segments are used to describe the execution process of the computer program 621 in the vehicle 600.

[0186] Those skilled in the art will understand that Figure 6 These are merely examples of vehicles and do not constitute a limitation on the vehicle, and may include more or fewer components than those shown in the figure, or a combination of certain components, or different components, such as input and output devices, network access devices, buses, etc.

[0187] The controller 610 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0188] The memory 620 may be an internal storage unit of the vehicle, such as a hard disk or memory of the vehicle, or an external storage device of the vehicle, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the vehicle. The above-mentioned memory 620 may also include both an internal storage unit of the vehicle and an external storage device. The above-mentioned memory 620 is used to store computer programs and other programs and data required by the vehicle. The memory 620 may also be used to temporarily store data that has been output or is to be output.

[0189] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0190] An embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a controller, the above-mentioned vehicle sand protection control method is implemented.

[0191] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0192] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0193] In the embodiments provided by the present invention, it should be understood that the disclosed devices / vehicles and methods can be implemented in other ways. For example, the device / vehicle embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0194] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0195] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0196] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the controller. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal and software distribution medium, etc.

[0197] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A vehicle sand protection control method, characterized in that: include: After detecting that the vehicle has entered a sandy area, the fan is controlled to rotate at a first speed; wherein the first speed is greater than a preset speed; Detecting whether the fan rotates abnormally; If the fan rotates abnormally, controlling the fan to rotate at a second speed; wherein the second speed is lower than the first speed; If the fan rotates normally, the fan is controlled to continue rotating at the first speed, and the step of detecting whether the fan rotates abnormally is re-executed after a preset time period until the vehicle leaves the sandy area.

2. The vehicle sand protection control method according to claim 1, characterized in that: After the fan rotates normally and the vehicle leaves the sandy area, the method further includes: After controlling the fan to rotate for a first preset time based on the idle speed, controlling the fan to rotate for a second preset time based on a third speed to perform self-cleaning; the third speed is greater than the idle speed; The steps of controlling the fan to rotate for a first preset time based on the idle speed and then controlling the fan to rotate for a second preset time based on the third speed are repeatedly performed until the number of repetitions reaches a preset number, and self-cleaning is stopped.

3. The vehicle sand protection control method according to claim 2, characterized in that: The method further comprises: In the process of controlling the fan to rotate for a second preset time based on the third speed, detecting whether the maximum speed of the fan is less than the third speed, and detecting whether the time required for the fan speed to reach the third speed is greater than the third preset time; If the maximum rotation speed of the fan is lower than the third rotation speed, or the time required for the rotation speed of the fan to reach the third rotation speed is longer than the third preset time, an abnormal alarm is issued.

4. The vehicle sand protection control method according to any one of claims 1 to 3, characterized in that: The second speed includes a plurality of speeds; Before controlling the fan to rotate at the second speed, the method further includes: Obtaining the degree of abnormal rotation of the fan; The second rotation speed is determined according to the degree of abnormal rotation of the fan; wherein the second rotation speed is negatively correlated with the degree of abnormal rotation of the fan, and the second rotation speed is greater than or equal to the idle speed.

5. The vehicle sand protection control method according to any one of claims 1 to 3, characterized in that: The detecting whether the fan rotates abnormally includes: Detecting whether the dynamic balance of the fan is abnormal and whether the rotation angular velocity of the fan is abnormal; If the dynamic balance of the fan is abnormal, or the rotation angular velocity of the fan is abnormal, it is determined that the fan rotates abnormally.

6. The vehicle sand protection control method according to claim 5, characterized in that: The detecting whether the dynamic balance of the fan is abnormal and whether the rotational angular velocity of the fan is abnormal includes: Detecting whether the rotation speed of the fan is outside a preset rotation speed range, and if the rotation speed is outside the preset rotation speed range, determining that the dynamic balance of the fan is abnormal; It is detected whether the rotation angular velocity of the fan is outside a preset angular velocity range. If the rotation angular velocity of the fan is outside the preset angular velocity range, it is determined that the rotation angular velocity of the fan is abnormal.

7. The vehicle sand protection control method according to any one of claims 1 to 3, characterized in that: Detecting whether the vehicle enters a sandy area includes: detecting whether the driving mode of the vehicle is a sand mode, and if the driving mode is a sand mode, determining that the vehicle has entered a sand area; Alternatively, detecting whether the vehicle is located in a preset sandy area, and if the vehicle is located in the preset sandy area, determining that the vehicle has entered the sandy area; Alternatively, an image of the surrounding environment of the vehicle is acquired, and it is detected whether there is a sandy scene in the surrounding environment image. If there is a sandy scene in the surrounding environment image, it is determined that the vehicle has entered a sandy area.

8. The vehicle sand protection control method according to any one of claims 1 to 3, characterized in that: The step of controlling the fan to rotate at a first speed includes: Obtaining a standard rotation speed of the fan corresponding to the sand area; Obtaining a first speed according to the sum of the standard speed and the additional speed; Based on the first rotation speed, the fan is controlled to rotate.

9. A vehicle sand protection control device, characterized in that: include: A first control module, configured to control the fan to rotate at a first speed after detecting that the vehicle has entered a sandy area; wherein the first speed is greater than a preset speed; A detection module, used to detect whether the fan rotates abnormally; A second control module, used for controlling the fan to rotate at a second speed when the fan rotates abnormally; wherein the second speed is lower than the first speed; The third control module is used to control the fan to continue rotating at the first speed when the fan rotates normally, and to re-execute the step of detecting whether the fan rotates abnormally after a preset time period until the vehicle leaves the sandy area.

10. A vehicle, comprising a memory and a controller, wherein the memory stores a computer program that can be run on the controller, characterized in that: When the controller executes the computer program, the vehicle sand protection control method according to any one of claims 1 to 8 is implemented.

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