CN117657070A

CN117657070A - Windshield defogging control method, system, storage medium and vehicle

Info

Publication number: CN117657070A
Application number: CN202311717985.5A
Authority: CN
Inventors: 黄国庆
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2023-12-13
Filing date: 2023-12-13
Publication date: 2024-03-08

Abstract

The application provides a control method, a system, a storage medium and a vehicle for defogging of a windshield, which belong to the technical field of vehicles, and the control method for defogging of the windshield comprises the following steps: when the vehicle is in an automatic defogging mode, responding to closing of an air conditioner, recording the current first defogging risk level of the windshield, and acquiring the second defogging risk level of the windshield in real time; determining a trend of change of the fog risk level of the windshield based on the first fog risk level and the second fog risk level; based on the change trend, the working state of the air conditioner is controlled. This application has prevented that the windshield fog from influencing the drive field of vision definition after the manual air conditioner that closes of user, under the circumstances that automatic defogging function was closed, and then leads to the problem that driving safety reduces. Meanwhile, the problem of reduced intelligence caused by the fact that a user needs to manually restart an automatic defogging function is avoided, and driving experience is optimized.

Description

Windshield defogging control method, system, storage medium and vehicle

Technical Field

The application relates to the technical field of vehicles, in particular to a control method and system for defogging a windshield, a storage medium and a vehicle.

Background

An air conditioner is an environmental temperature adjusting device on a vehicle, which can improve the environmental condition of an occupant. Meanwhile, the air conditioner is used for adjusting the ambient temperature, and can be used for defogging the windshield when the windshield is fogged.

In the related art, a vehicle equipped with an automatic defogging function automatically turns on an air conditioner to defog a windshield in the event that the possibility of fog formation of the windshield is detected. However, if the user manually turns off the air conditioner when the air conditioner defogs the windshield under the condition that the automatic defogging function is turned on, the automatic defogging function is directly turned off by the operation under one condition, and the intelligence and the driving safety of the vehicle are reduced.

Disclosure of Invention

Based on the control method, the control system, the storage medium and the vehicle for defogging of the windshield are provided, so that the problem of how to improve the intelligence and the safety of the vehicle is solved.

In a first aspect of embodiments of the present application, there is provided a method for controlling defogging of a windshield, the method comprising:

when the vehicle is in an automatic defogging mode, responding to the closing of an air conditioner, recording the current first defogging risk level of the windshield, and acquiring the second defogging risk level of the windshield in real time;

Determining a trend of change in the fog risk level of the windshield based on the first fog risk level and the second fog risk level;

and controlling the working state of the air conditioner based on the change trend.

Optionally, the controlling the working state of the air conditioner based on the change trend includes:

when the change trend represents that the fog risk level of the windshield rises, controlling the air conditioner to be in an on state;

and when the change trend represents that the fog risk level of the windshield is not increased, controlling the air conditioner to be in a closed state.

Optionally, the recording the first level of risk of fogging of the windshield in response to the turning off of the air conditioner includes:

determining a trigger source for triggering the closing in response to the closing of the air conditioner;

recording a current first fogging risk level of the windshield under the condition that the triggering source characterizes a user to trigger the closing;

the method further comprises the steps of:

and detecting the fog risk level of the windshield under the condition that the trigger source characterizes that the closing is not triggered by a user, and controlling the air conditioner to be in an opening state under the condition that the fog risk level is higher than a preset risk level.

Optionally, when the change trend indicates that the fog risk level of the windshield rises, controlling the air conditioner to be in an on state includes:

determining whether a level difference between the first fogging risk level and the second fogging risk level is greater than a preset level difference;

if yes, controlling the output power of the air conditioner to be first power;

if not, controlling the output power of the air conditioner to be the second power;

wherein the first power is greater than the second power.

Optionally, in a case where the vehicle is in the automatic defogging mode and the air conditioner is in an on state, the method further includes:

acquiring an ambient temperature around the vehicle;

and determining the air outlet type of the air conditioner based on the environmental temperature, wherein the air outlet type comprises a warm air type, a cold air type and a natural air type.

Optionally, the determining, based on the ambient temperature, an air outlet type of the air conditioner includes:

when the ambient temperature is higher than a first preset temperature, determining that the air outlet type is a cold air type;

when the ambient temperature is smaller than or equal to the first preset temperature and larger than the second preset temperature, determining that the air outlet type is a natural air type;

When the ambient temperature is less than or equal to the second preset temperature, determining that the air outlet type is a warm air type;

wherein the first preset temperature is greater than the second preset temperature.

acquiring an image of the windshield;

and determining a fog forming area of the windshield based on the image of the windshield, and controlling the air outlet direction to point to the fog forming area when the air conditioner is in an on state.

In a second aspect of embodiments of the present application, there is provided a control system for defogging a windshield, the system comprising:

the system comprises a grade acquisition module, a control module and a control module, wherein the grade acquisition module is used for responding to the closing of an air conditioner when a vehicle is in an automatic defogging mode, recording the current first defogging risk grade of the windshield and acquiring the second defogging risk grade of the windshield in real time;

the trend determining module is used for determining the change trend of the fog risk level of the windshield based on the first fog risk level and the second fog risk level;

and the decision execution module is used for controlling the working state of the air conditioner based on the change trend.

In a third aspect of embodiments of the present application, there is provided a computer-readable storage medium having stored thereon a computer program for execution by a processor to perform the steps of the method of controlling defogging of a windshield according to the first aspect of embodiments of the present application.

In a fourth aspect of the embodiments of the present application, a vehicle is provided, which includes a control system for defogging a windshield according to the second aspect of the embodiments of the present application, or includes a control module, where the control module is configured to implement the steps of the control method for defogging a windshield according to the first aspect of the embodiments of the present application.

The application provides a control method, a system, a storage medium and a vehicle for defogging of a windshield, wherein the method comprises the following steps: when the vehicle is in an automatic defogging mode, responding to the closing of an air conditioner, recording the current first defogging risk level of the windshield, and acquiring the second defogging risk level of the windshield in real time; determining a trend of change in the fog risk level of the windshield based on the first fog risk level and the second fog risk level; and controlling the working state of the air conditioner based on the change trend.

According to the method and the device, under the condition that the vehicle is in an automatic defogging mode, the first defogging risk level of the windshield at present is recorded in response to closing of the air conditioner, and the second defogging risk level of the windshield is obtained in real time. And then, judging the change trend of the fog risk level based on the first fog risk level and the second fog risk level, and controlling the working state of the air conditioner based on the change trend. According to the method and the device, after the air conditioner is closed, the working state of the air conditioner is controlled based on the change trend of the fog risk level, so that the problem that the driving vision definition is affected by fog on the windshield when the automatic defogging function is closed after the user manually closes the air conditioner is solved, and the driving safety is reduced is solved. Meanwhile, the problem of reduced intelligence caused by the fact that a user needs to manually restart an automatic defogging function is avoided, and driving experience is optimized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments of the present application will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a step diagram of a method for controlling defogging of a windshield according to an embodiment of the present application;

fig. 2 is a step chart of a method for determining an air conditioner control mode according to an embodiment of the present application;

fig. 3 is a step chart of an air conditioner control method based on a variation trend according to an embodiment of the present application;

fig. 4 is a method step diagram of air conditioner temperature control according to an embodiment of the present application;

fig. 5 is a method step diagram of air conditioner wind direction control according to an embodiment of the present application;

fig. 6 is a method step diagram of air conditioner closing control according to an embodiment of the present application;

FIG. 7 is a flowchart of a control method for defogging of a windshield according to an embodiment of the present application;

fig. 8 is a flowchart of a method for controlling an air conditioner to be turned on according to an embodiment of the present application;

Fig. 9 is a schematic structural diagram of a control system for defogging a windshield according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

In the related art, a vehicle equipped with an automatic defogging function automatically turns on an air conditioner to defog a windshield when it is detected that a fog risk level of the windshield is greater than a preset threshold. However, when the automatic defogging function is on, if the user manually turns off the air conditioner when defogging the windshield, the air conditioner detects the risk threshold value of the windshield again after the user manually turns off the air conditioner, and if the defogging risk level of the windshield is greater than the preset threshold value, the air conditioner is automatically restarted. This will result in the user being able to repeatedly shut down the air conditioner or directly shut down the automatic defogging function, reducing the intelligence and safety of the vehicle.

Based on the above, in order to solve the problem of how to improve the intelligence and safety of a vehicle, the application provides a control method, a system, a storage medium and a vehicle for defogging of a windshield, and under the condition that the vehicle is in an automatic defogging mode, the vehicle responds to closing of an air conditioner, records the current first defogging risk level of the windshield, and acquires the second defogging risk level of the windshield in real time. And then, judging the change trend of the fog risk level based on the first fog risk level and the second fog risk level, and controlling the working state of the air conditioner based on the change trend. According to the method and the device, after the air conditioner is closed, the working state of the air conditioner is controlled based on the change trend of the fog risk level, so that the problem that the driving vision definition is affected by fog on the windshield when the automatic defogging function is closed after the user manually closes the air conditioner is solved, and the driving safety is reduced is solved. Meanwhile, the problem of reduced intelligence caused by the fact that a user needs to manually restart an automatic defogging function is avoided, and driving experience is optimized. The specific method comprises the following steps:

an embodiment of the present application is presented in a first aspect of the present application, as shown in a step chart of a control method for defogging a windshield shown in fig. 1, where the method is applied to a vehicle-mounted controller, and the main steps include:

Step S101, in response to the closing of an air conditioner, when the vehicle is in an automatic defogging mode, recording the current first defogging risk level of the windshield, and acquiring the second defogging risk level of the windshield in real time.

The automatic defogging mode refers to a control mode for automatically controlling an air conditioner to defog a windshield without user triggering when the vehicle detects that the windshield is fogged. The vehicle may enter the automatic defogging mode in a number of ways, such as by a user pressing an "automatic defogging mode" button provided on the instrument desk, or for voice-controlling the vehicle to enter the automatic defogging mode.

The response to the closing of the air conditioner may be in response to an action of the user closing the air conditioner, or in response to a user-triggered air conditioner closing control instruction.

The fog risk level is a parameter for evaluating the degree of obstruction of the driver's vision by fog on the windshield. The higher the fog risk level is, the higher the obstruction degree of fog to the vision of a driver is, and the lower the definition of the vision of the driver is; conversely, the lower the risk level of fogging, the lower the obstruction of the driver's vision by the fog, and the higher the driver's visibility.

In an alternative embodiment, the fog risk level may be determined based on the position of the fog on the windshield, the size of the fog range, and the thickness of the fog. For example, the closer the windshield is to the driver, the higher the level of risk of fogging; the larger the fogging range is, the higher the fogging risk level is; the thicker the fogging thickness, the higher the fogging risk level.

Alternatively, the fogging risk level may be determined based on the surface temperature of the windshield and the air humidity around the windshield. Specifically, the dew point temperature of the windshield is calculated based on the surface temperature of the windshield and the air humidity around the windshield. Further, a fogging risk level is determined based on the dew point temperature of the windshield.

Step S102, determining the change trend of the fog risk level of the windshield based on the first fog risk level and the second fog risk level.

The first fog risk level is a current fog risk level acquired by the vehicle-mounted controller in response to closing of the air conditioner, and the second fog risk level is a fog risk level acquired by the vehicle-mounted controller in real time after the air conditioner is closed. In an alternative embodiment, the trend of the change in the fogging risk level may be determined by comparing the magnitude of the first fogging risk level with the magnitude of the second fogging risk level.

Specifically, when the second fogging risk level is greater than the first fogging risk level, indicating that the fogging risk level of the windshield is in an ascending trend; when the second fog risk level is smaller than the first fog risk level, indicating that the fog risk level of the windshield is in a descending trend; when the second fogging risk level is equal to the first fogging risk level, it is indicated that the fogging risk level of the windshield is in a constant trend.

Step S103, controlling the working state of the air conditioner based on the change trend.

The fog risk level actually characterizes the driver's field of view clarity. Accordingly, the trend of the fog risk level actually characterizes the trend of the driver's visual field clarity. If the change trend is an ascending trend, the visual field definition of the driver is deteriorated; if the trend is a decreasing trend, the driver is indicated to have improved visual field definition.

Therefore, the working state of the air conditioner is controlled based on the change trend, and the requirement of a driver on the visual field definition can be better met, so that the situation that the system automatically and repeatedly starts the air conditioner when the driver thinks that the visual field definition is still available under the current fog risk level is avoided.

The operating state of the air conditioner may include an on state and an off state, or may also include an output power or other operating parameters of the air conditioner when in the on state.

In a further embodiment of the present application, in addition to comprising the steps of the embodiments set forth above, further comprises:

optionally, referring to a method step diagram of determining an air conditioner control manner shown in fig. 2, in step S101, in response to turning off the air conditioner, recording a current first fogging risk level of the windshield, including:

and step S1011, responding to the closing of the air conditioner, and determining a trigger source for triggering the closing.

Trigger sources are of various types, and can be classified into trigger sources that characterize user-triggered closure, and trigger sources that characterize non-user-triggered closure, depending on whether they are triggered by the user. Whether the trigger source is triggered by the user characterizes different control intentions the user has to the air conditioner based on the demisting risk level. Thus, in the case where the air conditioner is turned off, a trigger source that triggers the turning off should be determined first.

If the trigger source characterizes the user to trigger the closing, the step S1012 is performed; if the trigger source indicates that the closing is not triggered by the user, the process proceeds to step S1013.

Step S1012, recording the current first fog risk level of the windshield.

And under the condition that the trigger source characterizes the user to trigger the closing, the user is expected to adopt a stricter opening strategy for the air conditioner, namely, the air conditioner is expected to be opened again under the condition that the demisting risk level is in an ascending trend. In this case, therefore, the current first risk level of fogging of the windshield should be recorded to determine whether the risk level of fogging of the windshield rises after the current time based on the first risk level of fogging.

Step S1013, detecting a fog risk level of the windshield, and controlling the air conditioner to be in an on state when the fog risk level is higher than a preset risk level.

Under the condition that the trigger source represents that the closing is not triggered by a user, the fact that the user has no obvious subjective tendency on the strict degree of the control strategy of the air conditioner is indicated, and at the moment, a loose control strategy can be adopted firstly, namely, the air conditioner is controlled to be in an opening state under the condition that the demisting risk level is detected to be higher than the preset risk level.

Specifically, the level of risk of fogging of the windshield is first detected. The fog risk level is determined in a plurality of modes, and the vehicle-mounted controller can send control signals to different information acquisition devices based on different modes of determining the fog risk level, so that the information acquisition devices acquire information required for determining the fog risk level. For example, if a fogging risk level is determined based on the surface temperature of the windshield and the air humidity around the windshield, a control signal is sent to the temperature sensor and the humidity sensor to acquire the surface temperature and the air humidity, respectively.

And then, when the fog risk level is greater than the preset risk level, indicating that fog generated by the windshield has the risk of reducing the visibility of the driver. At this time, in order to secure the running safety of the vehicle, it is necessary to turn on the air conditioner of the vehicle to defog the windshield.

In an alternative embodiment, the preset risk level may be dynamically adjusted according to the driving environment of the vehicle. For example, the height of the preset risk level increases with the light intensity of the environment in which the vehicle is located.

Taking the preset risk level of 1 as an example, when the fog risk level of the windshield is 0 level or 1 level, the fog risk level is not higher than the preset risk level of 1 level. When the fog risk level of the windshield is 2 levels, the fog risk level is higher than the preset risk level 1 level, and the air conditioner is controlled to be in an on state.

And in response to closing of the air conditioner, determining the closed trigger source, so that different influences of different trigger sources on air conditioner control can be clarified. Meanwhile, based on the difference of trigger sources, the air conditioner is further controlled differently, and the control of the vehicle on the air conditioner can be matched with the control intention of a user, so that the intelligent degree of the vehicle is improved.

Optionally, controlling the working state of the air conditioner based on the variation trend in step S103 includes the following two cases:

in the first case, when the change trend represents that the fog risk level of the windshield rises, the air conditioner is controlled to be in an on state.

As the trend of change characterizes the rise in the level of risk of fogging of the windshield, it is indicated that the driver's field of view clarity is currently deteriorating. At this time, in order to ensure the driving safety of the vehicle, the air conditioner should be controlled to be in an on state, so that the air conditioner defogs the windshield, and the obstruction of the fog on the sight of the driver is timely removed.

In addition, in an alternative embodiment, when the change trend represents that the fog risk level of the windshield is increased, the increase amplitude of the fog risk level can be further judged. When the rising amplitude of the fog risk level is larger than the preset amplitude, the air conditioner is controlled to be in an on state.

And secondly, when the change trend represents that the fog risk level of the windshield is not increased, controlling the air conditioner to be in a closed state.

When the change trend represents that the fog risk level of the windshield is not increased, namely the fog risk level is unchanged or the fog risk level is reduced, the visual field definition of the driver is not deteriorated currently, the requirement of the driver on the visual field definition is met, the windshield is not required to be defogged, and therefore the air conditioner is controlled to be in a closed state.

Optionally, referring to a step chart of an air conditioner control method based on a trend of variation shown in fig. 3, in the above-mentioned case, when the trend of variation characterizes that the level of risk of fogging of the windshield increases, controlling the air conditioner to be in an on state includes:

Step S11, determining whether a level difference between the first fogging risk level and the second fogging risk level is greater than a preset level difference.

In order to realize the accurate control to the air conditioner, improve the laminating degree of air conditioner control and driver's intention, when the fog risk level of variation trend characterization windshield rises, can also confirm the demand of driver to the air conditioner defogging speed through the level difference between first fog risk level and the second fog risk level.

If the level difference between the first fog risk level and the second fog risk level is greater than the preset level, it indicates that the visual field definition of the driver is fast deteriorating, and the air conditioner should be defogged at a fast defogging speed at this time, and the process goes to step S12.

If the level difference between the first fog risk level and the second fog risk level is smaller than or equal to the preset level, the degradation speed of the visual field definition of the driver is indicated to be slower, and the air conditioner can be defogged at the slower defogging speed at this time, and the step S13 is shifted.

And step S12, controlling the output power of the air conditioner to be the first power.

When the level difference between the first fog risk level and the second fog risk level is greater than the preset level, the visual field definition of the driver is indicated to deteriorate rapidly. At this time, in order to ensure the effectiveness of defogging, the air conditioner should be controlled to defog at a higher first power so that the defogging efficiency of the air conditioner coincides with the deterioration speed of the visibility, effectively suppressing the windshield from continuing to fog. Specifically, the first power of the air conditioner may be converted into wind energy or heat energy, or partially converted into wind energy, and partially converted into heat energy for defogging.

And S13, controlling the output power of the air conditioner to be the second power. Wherein the first power is greater than the second power.

When the level difference between the first and second fog risk levels is less than or equal to the preset level, it is indicated that the driver's visual field clarity deterioration speed is slow. At this time, in order to prevent the energy from being excessively consumed and to increase the energy use rate of the vehicle, the air conditioner should be controlled to defog with a second power smaller than the first power as the output power, so as to reduce the energy consumption of the vehicle while suppressing the windshield from continuing to fog. Specifically, the second power of the air conditioner may be converted into wind energy or heat energy, or partially converted into wind energy, and partially converted into heat energy for defogging.

In addition, when the level difference between the first fog risk level and the second fog risk level is smaller than the preset level difference, the output power of the air conditioner is controlled to be the second power, the working noise of the air conditioner can be reduced, and the riding comfort of passengers is improved.

In an alternative embodiment, the air conditioner may be controlled to be in a closed state when the level difference between the first fogging risk level and the second fogging risk level is smaller than the preset level difference, and the air conditioner is not turned on. And when the level difference between the first fog risk level and the second fog risk level is larger than the preset level difference, controlling the air conditioner to be in an on state. The preset level difference may be a fixed value or set by the user.

Optionally, referring to a method step diagram of air conditioner temperature control shown in fig. 4, in a case that the vehicle is in the automatic defogging mode and the air conditioner is in an on state, an air outlet type and temperature of the air conditioner may be adjusted according to an ambient temperature of the vehicle. Accordingly, the method may further comprise the steps of:

step S201, acquiring an ambient temperature around the vehicle.

The ambient temperature around the vehicle indicates that the user's demand for the type of outlet air of the air conditioner varies. For example, in summer the ambient temperature around the vehicle is high and the user needs an air conditioner to reduce the temperature inside the vehicle; the ambient temperature around the vehicle in spring and autumn is moderate, and a user does not need to adjust the temperature in the vehicle through an air conditioner; the ambient temperature around the vehicle is low in winter, and the user needs an air conditioner to raise the temperature in the vehicle. Therefore, in order to improve riding comfort of a user, the ambient temperature around the vehicle should be collected to ensure that the temperature in the vehicle is in a range that is comfortable for the user.

Step S202, determining the air outlet type of the air conditioner based on the environmental temperature. The air outlet type comprises a warm air type, a cold air type and a natural air type.

The warm air type is the air outlet type that the temperature of the air outlet of the air conditioner is higher than the temperature of the air inlet of the air conditioner; the cold air type is the air outlet type that the temperature of the air outlet of the air conditioner is less than the temperature of the air inlet of the air conditioner; the natural wind type refers to an air outlet type that the temperature of an air outlet of the air conditioner is equal to the temperature of an air inlet of the air conditioner.

Optionally, determining, in step S202, an air outlet type of the air conditioner for defogging the windshield based on the ambient temperature includes:

in the first case, when the ambient temperature is greater than a first preset temperature, the air outlet type is determined to be a cold air type.

When the ambient temperature is greater than the first preset temperature, indicating that the temperature of the outside environment of the vehicle is high, the user desires the air conditioner to lower the temperature in the vehicle. Therefore, when the ambient temperature is greater than the first preset temperature, the air conditioner should defog the windshield in a cool air type to reduce the temperature in the vehicle while defogging.

And secondly, when the ambient temperature is smaller than or equal to the first preset temperature and larger than the second preset temperature, determining that the air outlet type is a natural air type.

When the ambient temperature is less than or equal to the first preset temperature and greater than the second preset temperature, the temperature of the outside environment of the vehicle is indicated to be proper. Therefore, when the environment is less than or equal to the first preset temperature and greater than the second preset temperature, the air conditioner should defog the windshield in a natural wind type to maintain the temperature in the vehicle stable while defogging.

And thirdly, determining that the air outlet type is a warm air type when the ambient temperature is less than or equal to the second preset temperature. Wherein the first preset temperature is greater than the second preset temperature.

When the ambient temperature is less than or equal to the second preset temperature, indicating that the vehicle exterior environment temperature is low, the user desires the air conditioner to raise the temperature in the vehicle. Therefore, when the ambient temperature is less than or equal to the second preset temperature, the air conditioner should defog the windshield in a warm air type to raise the temperature in the vehicle while defogging.

Optionally, referring to a method step diagram of air-conditioning wind direction control shown in fig. 5, when the vehicle is in the automatic defogging mode and the air conditioner is in an on state, a foggy area may be identified according to an image of a windshield, so as to adjust an air-out direction of the air conditioner based on the foggy area. Accordingly, the method may further comprise the steps of:

step S301, acquiring an image of the windshield.

The image of the windshield may be captured by a camera disposed in the cab. The camera is connected with the vehicle-mounted controller so as to send the collected images of the windshield to the vehicle-mounted controller.

Step S302, determining a fog forming area of the windshield based on the image of the windshield, and controlling the air outlet direction to point to the fog forming area when the air conditioner is in an on state.

And performing image processing on the acquired windshield image, determining a fog-forming area of the windshield, and further controlling the air conditioner to defog the fog-forming area. In an alternative embodiment, the air outlet range of the air conditioner can be adjusted to coincide with the fog forming range of the windshield by adjusting the angle of the air guide grille at the air outlet of the air conditioner to enable the air outlet direction to be aligned with the fog forming area, so that the defogging efficiency of the windshield is improved.

Optionally, referring to a method step diagram of air conditioner off control shown in fig. 6, in a case where the vehicle is in the automatic defogging mode and the air conditioner is in an on state, the method includes:

step S401, controlling the air conditioner to be turned on for a first preset time period.

The first preset time length is the opening time length of the air conditioner, and can be preset by a user or changed along with the change of the fog risk level. For example, the first preset time period may increase as the fog risk level increases, considering that the higher the fog risk level, the thicker the fog on the windshield, and the longer the time to remove the fog on the windshield.

Step S402, detecting whether the windshield has a fog area or not in response to the timing of the first preset time period being finished.

And when the timing of the first preset time period is finished, the air conditioner is turned off. At this point the fog on the windshield should have been removed theoretically, but in order to determine if the fog on the windshield is actually removed, the fog area on the windshield should be detected.

If there is a fog region on the windshield, step S403 is performed, and if there is no fog region, step S404 is performed.

Step S403, controlling the air conditioner to be turned on for a second preset time period.

If a haze area is detected on the windshield, it is indicated that the haze on the windshield has not been actually completely removed. At this time, the air conditioner should be controlled to be turned on again for a second preset period of time to continue defogging the windshield. In an alternative embodiment, the second preset duration may be less than the first preset duration, considering that the air conditioner has defogged the windshield for a first preset duration before controlling the air conditioner to turn on for a second preset duration, the defogging for the first preset duration being less than the remaining fogging on the windshield after the defogging for the first preset duration is completed.

Step S404, controlling the air conditioner to be in a closed state.

If no fog area is detected on the windshield, the fog on the windshield is actually completely removed, and the closing state of the air conditioner can be maintained.

An embodiment is provided in a third aspect of the present application, and the method is shown in a flowchart of a control method for defogging a windshield shown in fig. 7, where the method is applied to a vehicle-mounted controller, and the method includes:

in response to the automatic defogging mode being on, the vehicle may first detect a fog risk level for the windshield; if the fog risk level is higher than the preset risk level, the air conditioner is started to defog the windshield.

And in the process of opening the air conditioner, responding to closing of the air conditioner, and determining a triggering source for triggering the closing. If the trigger source indicates that the closing is not triggered by a user, detecting the fog risk level of the windshield again, and controlling the air conditioner to be in an on state again under the condition that the fog risk level is higher than a preset risk level.

If the triggering source indicates that the user triggers the closing, for example, the user triggers an air conditioner closing instruction, responding to the closing of the air conditioner, recording the current first fog risk level of the windshield, and acquiring the second fog risk level of the windshield in real time after the air conditioner is closed.

And determining the change trend of the fog risk level of the windshield based on the first fog risk level and the second fog risk level.

If the recorded first fog risk level is 1 level in response to the air conditioner being turned off, when the acquired second fog risk level is 1 level or 0 level, the change trend is considered to be indicative of that the fog risk level of the windshield is not raised, and the air conditioner should be controlled to be in a turned-off state. When the obtained fog risk level is 4, the change trend is considered to represent that the fog risk level of the windshield is increased. At this time, it may be further determined whether the level difference between the first and second fogging risk levels is greater than a preset level difference.

Assuming that the preset level difference is 2 levels and the first fogging risk level is 1 level, when the second fogging risk level is 4 levels, controlling the output power of the air conditioner to be first power; and when the second fog risk level is 2, controlling the output power of the air conditioner to be the second power. Wherein the first power is greater than the second power, in particular, the first power may be 1kw and the second power may be 0.5kw.

The method for starting the air conditioner can refer to a method flowchart for controlling the air conditioner to be started as shown in fig. 8, and specifically comprises the following steps:

An ambient temperature around the vehicle is obtained.

Taking the first preset temperature as 25 ℃ and the second preset temperature as 5 ℃ as an example, when the ambient temperature is greater than the first preset temperature, for example, the ambient temperature is 30 ℃, determining that the wind type is a cold wind type; when the ambient temperature is less than or equal to the first preset temperature and greater than the second preset temperature, for example, when the ambient temperature is 10 ℃, determining that the wind type is natural wind type; when the ambient temperature is less than or equal to a second preset temperature, for example, when the ambient temperature is 0 ℃, determining that the wind type is a warm wind type; wherein the first preset temperature is greater than the second preset temperature.

At the same time, an image of the windshield is acquired. Based on the image of the windshield, a fogging region of the windshield is determined. After the wind type and the fog area of the windshield are determined, the air conditioner is controlled to defog the fog area of the windshield by the determined wind outlet type.

After the air outlet type and the air outlet direction of the air conditioner are determined, the air conditioner can be controlled to be started, and a first preset time period is designated to be started.

When the timing of the first preset time period is finished, the air conditioner can be turned off, and whether the windshield has a fog area or not is detected again.

If the windshield also has a fog area, controlling the air conditioner to be started for a second preset time period, wherein the second preset time period can be smaller than the first preset time period; in this case, the output power of the air conditioner may be unchanged or the output power of the air conditioner may be appropriately increased to rapidly eliminate the fogging region during the second preset period of time when the air conditioner is turned on.

If the fog area does not exist, the closing state of the air conditioner is maintained.

A fourth aspect of the present application proposes an embodiment, as shown in a schematic structural diagram of a control system for defogging a windshield shown in fig. 9, the system comprising:

Optionally, the level acquisition module is further configured to determine a trigger source for triggering the closing in response to the closing of the air conditioner; recording a current first fogging risk level of the windshield under the condition that the triggering source characterizes a user to trigger the closing; and detecting the fog risk level of the windshield under the condition that the trigger source characterizes that the closing is not triggered by a user, and controlling the air conditioner to be in an opening state under the condition that the fog risk level is higher than a preset risk level.

Optionally, the decision execution module is further configured to control the air conditioner to be in an on state when the change trend characterizes that the fog risk level of the windshield rises; and when the change trend represents that the fog risk level of the windshield is not increased, controlling the air conditioner to be in a closed state.

Optionally, the decision execution module is further configured to determine whether a level difference between the first fogging risk level and the second fogging risk level is greater than a preset level difference; if yes, controlling the output power of the air conditioner to be first power; if not, controlling the output power of the air conditioner to be the second power; wherein the first power is greater than the second power.

Optionally, the system further comprises a temperature control module for acquiring an ambient temperature around the vehicle when the vehicle is in the automatic defogging mode and the air conditioner is in an on state; and determining the air outlet type of the air conditioner based on the environmental temperature, wherein the air outlet type comprises a warm air type, a cold air type and a natural air type.

Optionally, the temperature control module is further configured to determine that the air outlet type is a cold air type when the ambient temperature is greater than a first preset temperature; when the ambient temperature is smaller than or equal to the first preset temperature and larger than the second preset temperature, determining that the air outlet type is a natural air type; when the ambient temperature is less than or equal to the second preset temperature, determining that the air outlet type is a warm air type; wherein the first preset temperature is greater than the second preset temperature.

Optionally, the system further comprises a wind direction control module for acquiring an image of the windshield; and determining a fog forming area of the windshield based on the image of the windshield, and controlling the air outlet direction to point to the fog forming area when the air conditioner is in an on state.

Embodiments of the present application also provide a computer readable storage medium having stored thereon a computer program/instruction which, when executed by a processor, implements a method of controlling defogging of a windshield as disclosed in embodiments of the present application.

The embodiment of the application also provides a vehicle, which comprises the control system for defogging the windshield or comprises a control module, wherein the control module is used for realizing the steps of the control method for defogging the windshield.

In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.

Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, systems, electronic devices, and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal device, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present embodiments have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the present application.

Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or terminal device comprising the element.

The above detailed description of a control method, a system, a storage medium and a vehicle for defogging a windshield provided in the present application, and specific examples are applied herein to illustrate the principles and embodiments of the present application, where the above examples are only used to help understand the method and core ideas of the present application; meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the ideas of the present application, the contents of the present specification should not be construed as limiting the present application in summary.

Claims

1. A method of controlling defogging of a windshield, the method comprising:

2. The method of controlling defogging of a windshield of claim 1, wherein said recording a current first level of risk of fogging of the windshield in response to a shut down of an air conditioner comprises:

the method further comprises the steps of:

3. The control method for defogging a windshield according to claim 1, wherein said controlling an operation state of said air conditioner based on said variation trend comprises:

4. A control method for defogging a windshield according to claim 3, wherein said controlling said air conditioner to be in an on state when said change trend indicates an increase in a fog risk level of said windshield comprises:

if yes, controlling the output power of the air conditioner to be first power;

wherein the first power is greater than the second power.

5. The control method of defogging a windshield according to claim 1, wherein in a case where said vehicle is in said automatic defogging mode and said air conditioner is in an on state, said method further comprises:

acquiring an ambient temperature around the vehicle;

6. The method of controlling defogging of a windshield according to claim 5, wherein said determining an outlet type of said air conditioner based on said ambient temperature comprises:

7. The method of defogging a windshield according to claim 1, wherein in a case where said vehicle is in said automatic defogging mode and said air conditioner is in an on state, said method further comprises:

acquiring an image of the windshield;

8. A control system for defogging a windshield, the system comprising:

9. A computer-readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, carries out the steps of the method for controlling defogging of a windshield according to any of claims 1 to 7.

10. A vehicle comprising a control system for defogging a windshield according to claim 8 or comprising a control module for implementing the steps of the control method for defogging a windshield according to any of the claims 1-7.