阅读说明：本技术 车窗除雾装置及车窗除雾方法 (Vehicle window defogging device and vehicle window defogging method ) 是由 吴荣华 于 2019-12-05 设计创作，主要内容包括：本申请提供了一种车辆除雾装置,应用于车辆。车辆包括第一车窗、第二车窗、及空调。车窗除雾装置包括：摄像头、第一温度传感器、第二温度传感器、湿度传感器、处理器。摄像头用于获取第一车窗、及第二车窗的起雾状态。第一温度传感器用于获取内表面的温度为第一温度。第二温度传感器用于获取外表面的温度为第二温度。湿度传感器,用于获取第一车窗、及第二车窗的表面湿度。处理器在摄像头获取到第一车窗、及第二车窗的至少一个起雾时,根据第一温度、第二温度、及表面湿度,控制空调出风进行除雾。本申请提供的车窗除雾装置消除了手动开启空调的安全隐患,使车窗除雾更加便利。本申请还提供了一种车辆除雾方法。(The application provides a vehicle defogging device is applied to the vehicle. The vehicle includes a first window, a second window, and an air conditioner. Door window defogging device includes: camera, first temperature sensor, second temperature sensor, humidity transducer, treater. The camera is used for obtaining the fogging states of the first vehicle window and the second vehicle window. The first temperature sensor is used for acquiring the temperature of the inner surface as a first temperature. The second temperature sensor is used for acquiring that the temperature of the outer surface is a second temperature. And the humidity sensor is used for acquiring the surface humidity of the first vehicle window and the second vehicle window. And when the processor acquires at least one of the first vehicle window and the second vehicle window, the processor controls the air outlet of the air conditioner to demist according to the first temperature, the second temperature and the surface humidity. The application provides a door window defogging device has eliminated the potential safety hazard of manually opening the air conditioner, makes the door window defogging more convenient. The application also provides a vehicle defogging method.)

1. The utility model provides a door window defogging device, is applied to the vehicle, its characterized in that, the vehicle includes first door window, second door window and air conditioner, door window defogging device includes:

the camera is used for acquiring the fogging states of the first vehicle window and the second vehicle window;

the first temperature sensor is used for acquiring the temperatures of the inner surfaces of the first vehicle window and the second vehicle window as first temperatures; the inner surface is a surface of the first window and the second window adjacent to the inside of the vehicle

The second temperature sensor is used for acquiring the temperatures of the outer surfaces of the first vehicle window and the second vehicle window as a second temperature; the outer surface is a surface of the first window and the second window adjacent to the outside of the vehicle

The humidity sensor is used for acquiring the surface humidity of the first vehicle window and the second vehicle window;

and the processor controls air conditioner outlet air to demist according to the first temperature, the second temperature and the surface humidity when the camera acquires at least one of the first vehicle window and the second vehicle window to be fogged.

2. The vehicle window defogging device according to claim 1,

when the first temperature is higher than the second temperature, the processor controls the air conditioner outlet air to enable the temperature of the inner surface to be reduced from the first temperature to the second temperature;

when the first temperature is lower than the second temperature, the processor controls the air outlet of the air conditioner to enable the temperature of the inner surface to be increased from the first temperature to the second temperature.

3. The vehicle window defogging device according to claim 2,

when the second temperature is lower than the first comfortable temperature, the processor controls the air conditioner outlet air to enable the temperature of the inner surface to be reduced from the first temperature to the vicinity of the second temperature;

when the second temperature is higher than a second comfortable temperature, the processor controls the air conditioner to discharge air so that the temperature of the inner surface is increased from the first temperature to the vicinity of the second temperature.

4. The vehicle window defogging device according to claim 1, wherein said air conditioner has a circulating vent pipe, one end of said circulating vent pipe is communicated with the outside of said vehicle, the other end of said circulating vent pipe is communicated with the inside of said vehicle, and when said surface humidity is higher than a humidity threshold value, said circulating vent pipe is controlled to open a circulating vent until said surface humidity is lower than said humidity threshold value.

5. The vehicle window defogging device according to claim 4,

when the surface humidity is higher than a first humidity threshold value, the processor controls the air conditioner to start circulating ventilation at a first wind speed;

when the surface humidity is lower than a second humidity threshold value, the processor controls the air conditioner to start circulating ventilation at a second wind speed,

wherein the first humidity threshold is greater than the second humidity threshold, the second humidity threshold is greater than the humidity threshold, and the first wind speed is greater than the second wind speed.

6. The vehicle window defogging device according to claim 1, wherein said vehicle further comprises a speaker, said processor determining a fog risk based on said first temperature, said second temperature, and said surface humidity, said processor controlling said speaker to emit a warning when said fog risk is greater than a risk threshold.

7. The vehicle window defogging device according to claim 1, wherein said vehicle window defogging device further comprises a voice recognition device, said voice recognition device receiving a voice signal and converting said voice signal into an audio electrical signal, said processor controlling the opening or closing of said camera, said first temperature sensor, said second temperature sensor, and said humidity sensor of said vehicle window defogging device based on said audio electrical signal.

8. A vehicle window defogging method, comprising:

acquiring a fogging state of a vehicle window;

acquiring the temperature of the inner surface of the car window as a first temperature, the temperature of the outer surface of the car window as a second temperature and the surface humidity of the car window;

and when the fogging state is fogging, demisting according to the first temperature, the second temperature and the surface humidity.

9. The vehicle window defogging method according to claim 8 wherein said defogging based on said first temperature and said second temperature comprises:

judging the relation between the first temperature and the second temperature;

when the first temperature is higher than the second temperature, controlling the temperature of the inner surface to be reduced from the first temperature to the second temperature;

when the first temperature is lower than the second temperature, the temperature of the inner surface is controlled to be increased from the first temperature to the second temperature.

10. The vehicle window defogging method according to claim 8 wherein said defogging based on said surface humidity comprises:

judging the relation between the surface humidity and a humidity threshold value;

controlling the surface humidity to be lower than the humidity threshold when the surface humidity is higher than the humidity threshold.

Technical Field

The application relates to the technical field of vehicle accessories and control, in particular to a vehicle window defogging device and a vehicle window defogging method.

Background

Vehicles are one of the most important vehicles in human modern life. Generally, a vehicle is equipped with an air conditioning system to prevent a problem that a window is fogged to obstruct a driver's view when a temperature difference or a humidity difference between the inside and the outside of the vehicle is large.

At present, a driver meets the problem of window fogging in the driving process and needs to manually start an air conditioning system to demist. After the defogging is finished, the manual closing is needed. The traditional method for manually starting the air conditioning system for demisting brings inconvenience, and when the air conditioning system is driven, the safety hazard exists when the air conditioning system needs to be started by dispersed attention.

Disclosure of Invention

The application discloses door window defogging device and door window defogging method can be when the door window hazes the automatic air conditioning system that opens carries out the defogging, has eliminated the potential safety hazard of manually opening air conditioning system, simultaneously, makes the door window defogging more convenient.

In a first aspect, the present application provides a door window defogging device for a vehicle, the vehicle including a first door window, a second door window and an air conditioner, the door window defogging device including:

the camera is used for acquiring the fogging states of the first vehicle window and the second vehicle window;

the first temperature sensor is used for acquiring the temperatures of the inner surfaces of the first vehicle window and the second vehicle window as first temperatures; the inner surface is a surface of the first window and the second window adjacent to the inside of the vehicle

The second temperature sensor is used for acquiring the temperatures of the outer surfaces of the first vehicle window and the second vehicle window as a second temperature; the outer surface is a surface of the first window and the second window adjacent to the outside of the vehicle

The humidity sensor is used for acquiring the surface humidity of the first vehicle window and the second vehicle window;

and the processor controls air conditioner outlet air to demist according to the first temperature, the second temperature and the surface humidity when the camera acquires at least one of the first vehicle window and the second vehicle window to be fogged.

When the vehicle has the vehicle window to fog, the processor automatically controls the air conditioner outlet air to demist according to the fogging state acquired by the camera, the first temperature, the second temperature and the surface humidity. The application provides door window defogging device has eliminated manual opening the potential safety hazard of air conditioner makes the door window defogging more convenient.

In a second aspect, the present application provides a vehicle window defogging method comprising:

acquiring a fogging state of a vehicle window;

acquiring the temperature of the inner surface of the car window as a first temperature, the temperature of the outer surface of the car window as a second temperature and the surface humidity of the car window;

and when the fogging state is fogging, demisting according to the first temperature, the second temperature and the surface humidity.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for a person skilled in the art to obtain other drawings based on the drawings without any inventive exercise.

Fig. 1 is a schematic top view of a vehicle according to a first embodiment of the present application.

Fig. 2 is a schematic view of a window defogging device frame according to a first embodiment of the present disclosure.

Fig. 3 is a schematic view of a circulating vent pipe according to a first embodiment of the present application.

Fig. 4 is a schematic top view of a vehicle according to a second embodiment of the present application.

Fig. 5 is a schematic diagram of a speech recognition apparatus according to a third embodiment of the present application.

Fig. 6 is a flowchart of a vehicle window defogging method according to a fourth embodiment of the present application.

Fig. 7 is a flow chart of a temperature defogging method according to a fourth embodiment of the present application.

Fig. 8 is a flow chart of a temperature defogging method according to a fifth embodiment of the present application.

Fig. 9 is a flow chart of humidity defogging according to a fourth embodiment of the present application.

Fig. 10 is a flow chart of humidity defogging according to a sixth embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

Referring to fig. 1 and fig. 2 together, fig. 1 is a schematic top view of a vehicle according to a first embodiment of the present application; fig. 2 is a schematic view of a window defogging device frame according to a first embodiment of the present disclosure. The vehicle 2 includes a first window 20, a second window 21, and an air conditioner 22. The window defogging device 1 includes: camera 10, first temperature sensor 11, second temperature sensor 12, humidity transducer 13, processor 14. The camera 10 is configured to acquire the fogging states of the first window 20 and the second window 21. The first temperature sensor 11 is configured to acquire that the temperatures of the inner surfaces of the first window 20 and the second window 21 are first temperatures. The inner surfaces are surfaces close to the first window 20 and the second window 21 in the vehicle interior, and the second temperature sensor 12 is used for acquiring that the temperatures of the outer surfaces of the first window 20 and the second window 21 are second temperatures. The outer surfaces are surfaces of the first window 20 and the second window 21 close to the outside of the vehicle, and the humidity sensor 13 is used for acquiring surface humidity of the first window 20 and the second window 21. When the camera 10 acquires at least one of the first window 20 and the second window 21, the processor 14 controls the air outlet of the air conditioner 22 to demist according to the first temperature, the second temperature and the surface humidity.

Specifically, the first window 20 is a window of the vehicle 2 that is close to the driver in the driving direction, and the second window 21 is a window of the vehicle 2 that is far from the driver in the driving direction. The first window 20 and the second window 21 are windows that mainly affect the driver's driving of the vehicle 2. It is understood that the window defogging device 1 provided by the present application is not only used for defogging the first window 20 and the second window 21 in the vehicle 2, but is illustrated by the first window 20 and the second window 21. The present application does not limit the window positions and the number of windows in the vehicle 2.

Specifically, in a possible embodiment, the camera 10 acquires images of the first window 20 and the second window 21, and the processor determines the fogging states of the first window 20 and the second window 21 through an image processing algorithm. For example, the camera 10 acquires an image of the first window 20 and an image of the second window 21, and the processor 14 analyzes the image of the first window 20 and the image of the second window 21 acquired by the camera 10 to determine whether there is at least one starting point on the first window 20 and the second window 21. If at least one fogging point is present on the first window 20 and the second window 21, the fogging state of at least one of the first window 20 and the second window 21 is fogging. For another example, when the camera 10 acquires the image of the first window 20 and the image of the second window 21, the camera focuses on the first window 20 and the second window 21, and the processor 14 determines the sharpness of the image of the first window 20 and the image of the second window 21 acquired by the camera 10. If the definition of the images outside the first window 20 and the second window 21, which is obtained by the camera 10, is lower than a preset definition, at least one of the first window 20 and the second window 21 is fogged.

In particular, in a possible embodiment, the first temperature sensor 11 and the second temperature sensor 12 comprise thermistors, the material of which is generally a metallic material. Due to the expansion and contraction properties of the metal material, the thermistor is influenced by temperature, and the resistance value of the thermistor is changed, so that a current value corresponding to the temperature is obtained to measure the temperature.

Specifically, in one possible embodiment, the humidity sensor 13 includes a humidity-sensitive resistor having a humidity-sensitive membrane. When the humidity sensing film absorbs moisture in the air, the resistance value of the humidity sensitive resistor changes, so that a current value corresponding to the humidity is obtained to measure the humidity.

It is understood that, in the present embodiment, the surface humidity of the first window 20 is not different from that of the second window 21 due to the space of the inner surface. Therefore, the surface humidity of the first window 20 and the surface humidity of the second window 21 measured by the humidity sensor 13 should be similar. The processor 14 is configured to determine an average value of the surface humidity of the first window 20 and the second window 21, but does not represent a limitation in the present application to the values of the surface humidity of the first window 20 and the second window 21.

It can be understood that, in this embodiment, when the vehicle 2 has windows to fog, the processor 14 automatically controls the air conditioner 22 to output air for defogging according to the fogging state acquired by the camera 10, the first temperature, the second temperature, and the surface humidity. The application provides window defogging device 1 has eliminated manual opening the potential safety hazard of air conditioner 22 makes the window defogging more convenient.

Specifically, in one possible embodiment, when the first temperature is higher than the second temperature, the processor 14 controls the air conditioner 22 to blow air so that the temperature of the inner surface is decreased from the first temperature to the second temperature. When the first temperature is lower than the second temperature, the processor 14 controls the air conditioner 22 to output air so that the temperature of the inner surface is increased from the first temperature to the second temperature.

Specifically, one of the main reasons for the fogging of the window is that moisture in the air on the surface of the window with higher temperature is condensed to form fog on the surface of the window due to the larger temperature difference between the two surfaces of the window. It can be understood that, in the present embodiment, the processor 14 controls the air conditioner 22 to output air, so as to reduce the temperature difference between the first temperature and the second temperature, and effectively remove the fog.

Specifically, in a possible implementation manner, when the temperature difference between the first temperature and the second temperature is greater than the threshold temperature, and the first temperature is greater than the second temperature, the processor 14 controls the air conditioner 22 to output air at a temperature less than the second temperature. When the temperature difference between the first temperature and the second temperature is greater than the threshold temperature, and the first temperature is less than the second temperature, the processor 14 controls the air conditioner 22 to output air at a temperature greater than the second temperature.

It is understood that, in the present embodiment, the processor 14 controls the air conditioner 22 to output air at a temperature less than or greater than the second temperature, so that the temperature difference between the first temperature and the second temperature can be reduced in a relatively fast time, thereby achieving the technical effect of rapid defogging.

Specifically, in one possible embodiment, when the second temperature is lower than the first comfort temperature, the processor 14 controls the air conditioner 22 to blow air so that the temperature of the inner surface is decreased from the first temperature to the first comfort temperature. When the second temperature is higher than the second comfortable temperature, the processor 14 controls the air conditioner 22 to output air so that the temperature of the inner surface is increased from the first temperature to the second comfortable temperature. Wherein the second comfort temperature is 25 degrees Celsius.

In particular, in a possible embodiment, the first comfort temperature is 18 degrees celsius and the second comfort temperature is 25 degrees celsius. It can be understood that the temperature range of 18 ℃ to 25 ℃ is a temperature range which is comfortable for human body. In another possible embodiment, the first comfort temperature and the second comfort temperature may have other values, and the application is not limited herein.

Specifically, the window fogging usually sounds under the weather of damp heat, rain and snow, and in order not to influence the normal driving of the driver, the temperature range from the first comfortable temperature to the second comfortable temperature, which is more comfortable for the human body, defines the temperature of the first temperature of the inner surface. For example, when the vehicle 2 runs on snow, the first temperature is higher than the second temperature, and the second temperature is too low. If the processor 14 controls the air outlet of the air conditioner 22 to lower the temperature of the inner surface from the first temperature to the second temperature, the driver may suffer from cold and freezing stiffness to fail to drive normally, which may cause an accident.

It is understood that, in this embodiment, the processor 14 controls the air conditioner 22 to output air to lower or raise the temperature of the inner surface from the first temperature to the first comfortable temperature and the second comfortable temperature, so as to keep the temperature of the inner surface within the range of the comfortable temperature of the human body while defogging, thereby ensuring normal driving of the driver.

In one possible embodiment, please refer to fig. 3, in which fig. 3 is a schematic diagram of a circulation duct according to a first embodiment of the present application. The air conditioner 22 has a circulating duct 221, one end of the circulating duct 221 communicates with the outside of the vehicle 2, and the other end of the circulating duct 221 communicates with the inside of the vehicle 2. And when the surface humidity is higher than a humidity threshold value, controlling the circulating ventilation pipe 221 to start circulating ventilation until the surface humidity is lower than the humidity threshold value.

In particular, another important cause of window fogging is excessive air humidity. When the air humidity is too high, water molecules in the air can be liquefied and condensed on the surface of the vehicle window to form mist. As can be appreciated, reducing the humidity of the air can effectively defog the fog.

Specifically, in one possible embodiment, the processor 14 controls the air conditioner 22 to initiate a cyclic ventilation at a first wind speed when the surface humidity is above a first humidity threshold. When the surface humidity is below a second humidity threshold, the processor 14 controls the air conditioner 22 to initiate a circulating ventilation at a second air speed. Wherein the first humidity threshold is greater than the second humidity threshold, the second humidity threshold is greater than the humidity threshold, and the first wind speed is greater than the second wind speed.

It is understood that in the present embodiment, when the surface humidity is relatively high, the circulating ventilation is started at a high wind speed to achieve the purpose of quick defogging. When the surface humidity is reduced, the possibility of window fogging is reduced, circulating ventilation does not need to be started at a particularly high wind speed, and noise is generated at the high wind speed to influence the driving of a driver. Thus, when the surface humidity is below the second humidity threshold, the processor 14 controls the air conditioner 22 to initiate a circulating ventilation at a second wind speed.

It will be appreciated that in this embodiment, the processor 14 dynamically adjusts the air conditioner 22 of the vehicle 2 to defog more intelligently than the conventional solution of directly circulating ventilation at a higher wind speed to defog.

In a possible implementation manner, please refer to fig. 4 together, and fig. 4 is a schematic top view of a vehicle according to a second implementation manner of the present application. The vehicle 2 further comprises a speaker 23, and the processor 14 determines the risk of fogging based on the first temperature, the second temperature, and the surface humidity. When the risk of fogging is greater than a risk threshold, the processor 14 controls the speaker 23 to emit a reminder.

Specifically, the processor 14 obtains the first temperature and the second temperature, and calculates a temperature difference between the first temperature and the second temperature. Meanwhile, the processor 14 obtains the surface humidity, and calculates a humidity difference between the surface humidity and the humidity threshold. The processor 14 derives the fogging risk from the temperature difference and the humidity difference. When the risk of fogging is greater than a risk threshold, the processor 14 controls the speaker 23 to emit a reminder.

Specifically, the processor 14 may further determine whether the vehicle 2 is driven in severe weather such as rain and snow according to the first temperature, the second temperature, and the surface humidity, so as to control the speaker 23 to issue a prompt.

It can be understood that, in the present embodiment, the processor 14 controls the speaker 23 to issue a prompt, which effectively prompts the driver to risk the following fog and bad weather such as rain and snow, and reduces the driving risk. The driver can drive slowly and safely according to the warning of the risk of fogging, and accidents caused by the fact that the driver is blocked by sudden fogging are prevented.

In a possible implementation manner, please refer to fig. 5, and fig. 5 is a schematic diagram of a frame of a speech recognition apparatus according to a third implementation manner of the present application. The vehicle window defogging device 1 further comprises a voice recognition device 15, wherein the voice recognition device 15 receives a voice signal and converts the voice signal into an audio electric signal. The processor 14 controls the opening or closing of the camera 10, the first temperature sensor 11, the second temperature sensor 12, and the humidity sensor 13 of the vehicle window defogging device 1 according to the audio electrical signal.

Specifically, as shown in fig. 5, the speech recognition device 15 includes a receiver 151 and a memory 152. The receiver 151 is configured to receive the voice signal and convert the voice signal into the audio electrical signal, and the memory 152 stores a voice instruction. When the audio electrical signal matches the voice command, the processor 14 controls the opening or closing of the camera 10, the first temperature sensor 11, the second temperature sensor 12, and the humidity sensor 13 of the vehicle window defogging device 1 according to the audio electrical signal. For example, the receiver 151 receives an "on" voice signal and converts the voice signal into an audio electric signal, and the memory 152 stores a voice command "on", so that the audio electric signal matches the voice command. The processor 14 controls the opening of the camera 10, the first temperature sensor 11, the second temperature sensor 12 and the humidity sensor 13 of the vehicle window defogging device 1 according to the audio frequency electric signal 'on'.

As can be appreciated, the window defogging device 1 can be used more conveniently by controlling the opening or closing of the window defogging device 1 in a voice manner. Meanwhile, the potential safety hazard of manually opening the air conditioner 22 is eliminated, and the safety of a driver is guaranteed.

Combine the window defogging device 1 that this application provided, this application still provides a window defogging method. The terms used in the window defogging method are the same as those used in the window defogging device 1, and please refer to the description of the window defogging device 1 described above, which is not described herein again. Referring to fig. 6, fig. 6 is a flowchart illustrating a defogging method for a vehicle window according to a fourth embodiment of the present application. The vehicle window defogging method comprises steps S601, S602 and S603, and the steps S601, S602 and S603 are described in detail as follows.

S601, obtaining the fogging state of the vehicle window;

s602, acquiring the temperature of the inner surface of the car window as a first temperature, the temperature of the outer surface of the car window as a second temperature and the surface humidity of the car window;

s603, when the fogging state is fogging, demisting according to the first temperature, the second temperature and the surface humidity.

It is understood that, in this embodiment, S601 is introduced before S602, and in another possible embodiment, S601 and S602 may be performed simultaneously, or S601 is located after S602.

In one possible implementation, please refer to fig. 7 together, and fig. 7 is a flowchart illustrating a temperature defogging process according to a fourth implementation of the present application. The defogging according to the first temperature and the second temperature includes steps S701, S702, and S703, and the steps S701, S702, and S703 are described in detail as follows.

S701, judging the relation between the first temperature and the second temperature;

s702, when the first temperature is higher than the second temperature, controlling the temperature of the inner surface to be reduced from the first temperature to the second temperature;

s703, when the first temperature is lower than the second temperature, controlling the temperature of the inner surface to be increased from the first temperature to the second temperature.

In a possible embodiment, please refer to fig. 8, and fig. 8 is a flowchart illustrating a temperature defogging process according to a fifth embodiment of the present application. The defogging according to the first temperature and the second temperature includes steps S801, S802, and S803, and the steps S801, S802, and S803 are described in detail as follows.

S801, judging the relationship between the second temperature and the first comfortable temperature as well as the second comfortable temperature;

s802, when the second temperature is lower than the first comfort temperature, controlling the temperature of the inner surface to be reduced from the first temperature to the first comfort temperature;

and S803, when the second temperature is higher than the second comfort temperature, controlling the temperature of the inner surface to be raised from the first temperature to the second comfort temperature.

In one possible implementation, please refer to fig. 9 together, and fig. 9 is a flow chart of humidity defogging according to a fourth implementation of the present application. The defogging according to the surface humidity includes steps S901 and S902, and the steps S901 and S902 are described in detail as follows.

S901, judging the relation between the surface humidity and a humidity threshold;

s902, when the surface humidity is higher than the humidity threshold value, controlling the surface humidity to be lower than the humidity threshold value.

It is to be understood that in this embodiment, no response is required when the surface humidity is less than or equal to the humidity threshold. Of course, this is not limited by this application.

In one possible implementation, please refer to fig. 10 together, and fig. 10 is a flow chart of humidity defogging according to a sixth implementation of the present application. The defogging according to the surface humidity includes steps S101, S102, and S103, and the steps S101, S102, and S103 are described in detail as follows.

S101, judging the relation between the surface humidity and a first humidity threshold value and a second humidity threshold value;

s102, when the surface humidity is higher than the first humidity threshold value, starting circulating ventilation at a first wind speed;

s103, when the surface humidity is lower than the second humidity threshold value, starting circulating ventilation at a second wind speed.

The principle and the implementation of the present application are explained herein by applying specific examples, and the above description of the embodiments is only used to help understand the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.