CN117400874A - Automobile windshield defogging device and method and device and automobile - Google Patents
Automobile windshield defogging device and method and device and automobile Download PDFInfo
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- CN117400874A CN117400874A CN202311618332.1A CN202311618332A CN117400874A CN 117400874 A CN117400874 A CN 117400874A CN 202311618332 A CN202311618332 A CN 202311618332A CN 117400874 A CN117400874 A CN 117400874A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/023—Cleaning windscreens, windows or optical devices including defroster or demisting means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
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- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
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Abstract
The application relates to the technical field of automobile control, and provides a method and device for demisting an automobile windshield and an automobile. The method comprises the following steps: shooting an image of an automobile windshield, identifying the image by utilizing an image identification algorithm, and determining the fog situation of the automobile windshield; if the automobile windshield is recognized to be fogged, controlling to start a defogging function of the automobile windshield to defog; acquiring the humidity in the vehicle and the current temperature of the windshield in the defogging process; inputting the humidity in the vehicle and the current temperature of the windshield into a preset calculation model to obtain the adjustment parameters of defogging strength; and adjusting the defogging strength of the defogging function of the windshield based on the adjustment parameter. This application can open defogging automatically when glass fogs and according to the intensity of humidity in the car and windshield temperature self-adaptation regulation defogging, does not need the manual work to carry out defogging, and is very intelligent, has avoided the risk that the manual work probably leads to in the automobile driving, has improved automobile driving's security.
Description
Technical Field
The application relates to the technical field of automobile control, in particular to a method and a device for demisting an automobile windshield and an automobile.
Background
In the running process of the existing vehicle in ice and snow weather or in rainwater weather with high humidity, the temperature difference between the inside and the outside is high due to the fact that an air conditioner in the vehicle is started, fog is formed on front and rear windshields, front and rear windows and left and right rearview mirrors, and the normal vision of a driver is affected. In practice, when a driver finds that the glass is fogged, for example, the front windshield is fogged, and cannot be removed by the wiper, it is often necessary to turn on the corresponding front windshield defogging function button to defog, and it is generally necessary to blow air to the windshield to defog. But if the glass is fogged repeatedly, then need the driver to turn on and off the defogging function repeatedly by hand and defog, if turn on the defogging function always, on the one hand extravagant energy consumption, on the other hand can influence the travelling comfort of cabin personnel, for example if turn on the front windshield defogging function always and blow defogging in winter, the temperature in the cabin can be reduced to can produce cold wind.
Therefore, although the existing automobile has the glass defogging function, the corresponding glass defogging function is automatically started to automatically defog when the glass is fogged, the defogging is adjusted in the automobile driving process in a self-adaptive manner, the problems that the defogging is not timely and thorough due to manual frequent operation or operation is not known are solved, the defogging is more intelligent, and the automobile is the technical problem to be solved in the current automobile cabin application.
Disclosure of Invention
In view of this, the embodiment of the application provides a method and a device for demisting an automobile windshield and an automobile, so as to solve the problem of how to adaptively demist automobile glass in the prior art.
In a first aspect of an embodiment of the present application, there is provided a defogging method for a windshield of an automobile, including: shooting an image of an automobile windshield, identifying the image by utilizing an image identification algorithm, and determining the fog situation of the automobile windshield; if the automobile windshield is recognized to be fogged, controlling to start a defogging function of the automobile windshield to defog; acquiring the humidity in the vehicle and the current temperature of the windshield in the defogging process; inputting the humidity in the vehicle and the current temperature of the windshield into a preset calculation model to obtain the adjustment parameters of defogging strength; and adjusting the defogging strength of the defogging function of the windshield based on the adjustment parameter.
In a second aspect of embodiments of the present application, there is provided an automotive windshield defogging device comprising: the fog recognition module is configured to shoot an image of the automobile windshield, recognize the image by utilizing an image recognition algorithm and determine the fog condition of the automobile windshield; the defogging control module is configured to control starting a defogging function of the windshield of the automobile to defog if the windshield of the automobile is recognized to be fogged; a glass parameter module configured to obtain an in-vehicle humidity and a windshield temperature during defogging; the parameter calculation module is configured to input the humidity in the vehicle and the temperature of the windshield into a preset calculation model to obtain adjustment parameters of defogging strength; and a defogging adjustment module configured to adjust a defogging strength of a defogging function of the windshield based on the adjustment parameter.
In a third aspect of the embodiments of the present application, there is provided an automobile having at least one windshield defogging function and comprising a sensor, a controller, a memory, and a computer program stored in the memory and executable on the processor, the controller being coupled to both the sensor and the memory and being capable of controlling the at least one windshield defogging function, the processor executing the computer program to perform the steps of the method described above.
Compared with the prior art, the beneficial effects that the embodiment of the application exists lie in: according to the method, whether the glass is fogged or not is automatically identified by shooting the image of the windshield, and the defogging function of the windshield of the automobile is automatically started to defog when the windshield is fogged, meanwhile, in the defogging process, the defogging strength can be adjusted in a self-adaptive mode according to the humidity in the automobile and the temperature of the windshield, so that the defogging is not needed manually, the defogging can be automatically started when the glass is fogged, the defogging strength can be adjusted in a self-adaptive mode according to the humidity in the automobile and the temperature of the windshield, the method is very intelligent, the risk that the defogging function of the glass is manually operated frequently or is not known to be operated in the driving process of the automobile, and the driving safety of the automobile is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly introduce the drawings that are needed in the embodiments or the description of the prior art, it is 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 schematic view of an application scenario according to an embodiment of the present application;
FIG. 2 is a schematic flow chart of a method for defogging an automobile windshield according to an embodiment of the present application;
FIG. 3 is a flow chart of another method for defogging an automotive windshield according to an embodiment of the present application;
FIG. 4 is a schematic view of a windshield wiper device for a vehicle according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of an automobile according to an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
Fig. 1 is a schematic view of an application scenario according to an embodiment of the present application. The application scenario may include an automobile, where at least the sensor 100, the controller 200 and the defogging device 300 related to windshield detection are disposed on the automobile, and the defogging device 300 is used for implementing a windshield defogging function of the automobile.
Among them, the sensor 100 includes, but is not limited to, a visual sensor, a humidity sensor, and a temperature sensor. The vision sensor may be a camera, a laser radar, an infrared sensor, etc., in this embodiment, the vision sensor is preferably a camera, the camera is used to capture an image of the glass, and the captured image is identified by an image identification algorithm, so as to determine whether the glass in the image is fogged or frosted, etc. The humidity sensor and the temperature sensor are respectively arranged on the glass of the automobile, the humidity sensor can be a capacitive humidity sensor, a resistive humidity sensor or a thermal humidity sensor, and the temperature sensor can be a thermocouple, a resistive temperature detector, a thermistor, and the like. In addition, the visual sensor may preferably be mounted above the glass or at a roof or the like, and the humidity sensor and the temperature sensor may be provided at one or more positions on the surface of the glass or inside the glass, which is not limited in this application.
The controller 200 may be an independent microprocessor or microcomputer system, where the controller 200 is connected to the sensor 100 and is also connected to the vehicle controller of the vehicle, and the defogging device 300 is connected to the vehicle controller. When the microprocessor or the microcomputer system receives the signal of the sensor 100, the microprocessor or the microcomputer system can produce and send the command for controlling the defogging device 300 to the vehicle controller after processing and analyzing, and the vehicle controller controls the defogging device 300 to work according to the command, for example, controls the defogging device 300 to be turned on or off, adjusts the defogging strength, and the like. In addition, the controller 200 may also be a vehicle controller of an automobile, that is, the sensor 100 and the defogging device 300 are respectively connected with the vehicle controller, and the vehicle controller directly receives the signal of the sensor 100 and performs analysis processing, and then sends corresponding control instructions to the defogging device 300, including but not limited to an instruction for opening or closing the defogging device 300, an instruction for adjusting the defogging strength of the defogging device 300, and the like.
There are many specific implementations of the defogging device 300, for example, the defogging device 300 may be implemented to introduce external fresh air into the vehicle by adjusting the ventilation system of the vehicle to assist in removing moisture from the windshield. The ventilation system distributes air through fans and vents to different areas within the vehicle, including the windshield. In addition, the air conditioning system of the automobile can assist the ventilation system in defogging, namely, the air conditioning system of the automobile can be started in the defogging process to dehumidify by reducing the humidity in the air, so that the fog on the windshield is reduced. In some vehicles, the air conditioning system may also remove moisture from the windshield in a cooling mode. For another example, the defogging device 300 may also be implemented as glass heating, i.e., heating the glass. Specifically, a heating element is embedded in the windshield, and the heating element is controlled to heat the surface of the glass to accelerate the removal of fog or frost. Of course, the manner of implementing the demister 300 is not limited to the above two ways, and other manners may be implemented, which are not limited in this application.
It is understood that the defogging objects of the defogging device in the embodiments of the present application are glass on an automobile, including but not limited to front windshields, rear windshields, side windshields, and the like of the automobile. Preferably, for convenience of explanation, the following embodiments will be described with respect to a windshield (i.e., including a front windshield and a rear windshield) as a defogging object.
Fig. 2 is a schematic flow chart of a defogging method for a windshield of an automobile according to an embodiment of the application. The method of defogging an automotive windshield of fig. 2 may be performed by the controller 200 of fig. 1. As shown in fig. 2, the defogging method for the automobile windshield comprises the following steps:
s201, shooting an image of an automobile windshield, identifying the image by utilizing an image identification algorithm, and determining the fogging condition of the automobile windshield;
s202, if fog is recognized on the windshield of the automobile, controlling to start a defogging function of the windshield of the automobile to defog;
s203, acquiring the humidity in the vehicle and the current temperature of the windshield in the defogging process;
s204, inputting the humidity in the vehicle and the current temperature of the windshield into a preset calculation model to obtain adjustment parameters of defogging strength;
s205, adjusting the defogging strength of the defogging function of the windshield based on the adjustment parameter.
According to the technical scheme that this application embodiment provided, whether the image through shooting windshield automatic identification glass fogs, and the windshield defogging function of automatic start car carries out the defogging when the windshield appears fogging, simultaneously in defogging process, can also adjust the intensity of defogging according to humidity in the car and windshield temperature self-adaptation, consequently the method that this application embodiment provided need not the manual work and carries out the defogging, can open defogging automatically when glass fogs and adjust the intensity of defogging according to humidity in the car and windshield temperature self-adaptation, very intelligent, avoided the manual work frequently to operate or not know the risk that the glass defogging function was probably led to so that in-process people of driving of car has improved the security of car.
In the above step S201, it is a common image processing and computer vision application to determine whether the glass is fogged by recognizing the image of the shot glass by the image recognition algorithm. The image recognition algorithm may be a machine learning model or a deep learning model, which may be obtained by model training through sample images in advance. For example, an image of the glass surface is first captured using a camera inside the vehicle or other available image capture device; preprocessing the image, including denoising, graying, edge detection and the like; features for determining whether the glass is hazy are then extracted from the image, which may include but are not limited to texture features, color features, edge features, etc., in which case a blurred texture or flare is typically observed; then, using the extracted features, a model can be built using machine learning or deep learning techniques, which can learn the glass fogging pattern via training data, thereby enabling predictions on new images; preferably, the training model is arranged on an automobile or a server in communication with the automobile, and the images of the windshield captured by the vision sensor are input into the model, so that corresponding recognition results can be obtained at the output of the model, and generally, the recognition results comprise that the windshield is fogged and the windshield is not fogged.
In some embodiments, after the step S201, that is, after capturing an image of the windshield of the automobile and identifying the image by using an image recognition algorithm, determining the fogging condition of the windshield of the automobile may further include: if it is recognized that the automobile windshield is not fogged, the process returns to step S201, and the image of the automobile windshield is captured again and is recognized by the image recognition algorithm to monitor the fogged state of the automobile windshield.
In addition, after the defogging function of the windshield of the automobile is controlled to be started for defogging, the step S201 can be returned to, namely, the image of the windshield of the automobile is continuously shot, the image is identified by utilizing an image identification algorithm, and the defogging condition of the windshield of the automobile is determined; if no fogging of the windshield of the automobile is recognized, the control turns off the defogging function of the windshield of the automobile or maintains the recent defogging degree to prevent further fogging.
For example, fig. 3 is a schematic flow chart of another defogging method for a windshield of an automobile according to an embodiment of the present application, where the defogging method for a windshield of an automobile includes:
s310, shooting an image of an automobile windshield, identifying the image by utilizing an image identification algorithm, and determining the fogging condition of the automobile windshield;
S321, if the automobile windshield is recognized to be fogged, controlling to start a defogging function of the automobile windshield to defog;
s3211, acquiring the humidity in the vehicle and the current temperature of the windshield in the defogging process;
s3212, inputting the humidity in the vehicle and the current temperature of the windshield into a preset calculation model to obtain adjustment parameters of defogging strength;
s3213, adjusting the defogging strength of the defogging function of the windshield based on the adjusting parameter, and returning to the step S310;
s322, if no fog is recognized on the windshield of the automobile, detecting whether the defogging function of the windshield of the automobile is in an on state:
s3221, if yes, closing the defogging function of the windshield of the automobile and returning to the step S310;
s3222, if not, directly returns to step S310.
According to the embodiment of the application, the fog-forming condition of the glass is automatically identified through shooting the image of the windshield, the defogging function of the windshield of the automobile is automatically opened or closed according to the fog-forming condition, manual defogging is not needed, meanwhile, in the defogging process of opening the defogging function of the windshield, the defogging strength can be adaptively adjusted according to the humidity in the automobile and the temperature of the windshield, the intelligent automobile is quite realized, the risk that the defogging function of the glass is possibly caused due to frequent manual operation or unaware of operation in the driving process of the automobile is avoided, and the driving safety of the automobile is improved.
The specific implementation of the windshield defogging function in step S202 is not limited to the embodiment shown in fig. 1, and the specific implementation of the windshield defogging function in this embodiment includes blowing defogging by guiding air to the windshield with the ventilation system of the automobile, and heating the surface of the windshield with the heating element. I.e. the car has two windshield defogging functions.
Specifically, in step S202, when the defogging function of the windshield is controlled to be turned on to defog, the ventilation system of the automobile may be turned on to guide air to the windshield to blow and defog, the heating element may be turned on to heat the surface of the windshield, or both may be simultaneously operated.
In some embodiments, in step S202, controlling the windshield defogging function of the automobile to be turned on for defogging may specifically include: identifying the temperature outside the automobile; determining the current preset environment type of the automobile according to the outside temperature, wherein the preset environment type at least comprises two types, and each preset environment type corresponds to at least one outside temperature; according to the current preset environment type of the automobile, a corresponding windshield defogging function is started to defog, the automobile comprises at least two windshield defogging functions, and each preset environment type corresponds to one windshield defogging function.
The temperature outside the automobile refers to the temperature of the surrounding environment of the automobile, and the reasons for generating fog on the glass of the automobile are different in different seasons and different temperatures outside the automobile. In particular, in combination with the two implementations of the above-described defogging function of the windshield, the interior of the vehicle may become very hot due to direct sunlight in summer, and when moisture in the air in the vehicle comes into contact with the cooled glass surface after the air conditioner is cooled, fog may be formed. In winter, the outside temperature is typically lower, while the interior of the vehicle may become warmer through the vehicle heating system. When hot and humid air in a vehicle contacts a cold glass surface, mist may be generated. Therefore, if the temperature outside the automobile is higher in summer, the air conditioner in the automobile is generally started to refrigerate to reduce the temperature inside the automobile, so that the air conditioner can directly utilize the refrigeration mode auxiliary ventilation system of the air conditioner system of the automobile to blow the windshield, the humidity and the temperature inside the automobile are reduced, and the air conditioner system can help dehumidify and reduce the water vapor on the surface of the glass, so that the formation of fog is reduced. In addition, if winter, then the outside temperature of car is lower, and the interior temperature in the car that can start the air conditioner in this moment generally heats to improve the car, so can directly utilize the heating mode of the air conditioning system of car to assist ventilation system to guide hot air to glass surface, because air conditioning system not only can heat in the car, can also reduce the interior humidity through dehumidification, prevent the production of fog. Naturally, in the winter and summer, the windshield may be heated to heat the glass surface, and the effect of quickly removing mist may be similarly achieved, thereby improving the driving sight line.
Preferably, the preset environment types of the automobile may include a low temperature environment and a high temperature environment, which correspond to two different temperature ranges, respectively, where the temperature ranges may be two consecutive temperature ranges, for example, the low temperature environment corresponds to an off-vehicle temperature range of 15 ° (of course, other temperature values may be used instead of only 15 °), and the high temperature environment corresponds to an off-vehicle temperature range of > 15 °. In addition, the temperature range may also be a temperature set including a plurality of preset temperature values, which is not limited in this application.
In this case, in the above embodiment, according to the type of the preset environment where the automobile is currently located, the corresponding defogging function of the windshield is started to perform defogging, including: when the automobile is in a low-temperature environment, controlling to start a heating element corresponding to the surface temperature of the windshield to heat and defog the glass; when the automobile is in a high-temperature environment, controlling to start an automobile ventilation system to guide air to a windshield for blowing and demisting, and starting a refrigerating mode of an air conditioning system to refrigerate the air guided to the windshield; wherein, this windshield defogging function includes that the surface temperature of rising windshield carries out glass heating defogging and guides the air to the windshield and carries out glass blowing defogging.
In addition, when the automobile is in a low-temperature environment, besides the embodiment, a mode of starting an automobile ventilation system to guide air to the windshield and starting a heating mode of an air conditioning system to heat the air guided to the windshield can be adopted to blow and defog the glass; and if no fog is detected on the windshield, starting a defogging function of the windshield for raising the surface temperature of the windshield, and controlling to close a ventilation system to guide air to the windshield. Because promotion windshield surface temperature defogging effect is generally slower than the defogging effect of blowing to the windshield surface, therefore, this application embodiment utilizes ventilation system and air conditioning system's cooperation to carry out quick defogging with hot air guide to windshield, after the defogging is accomplished, open the windshield defogging function of intensification windshield surface temperature again and prevent that windshield from fog repeatedly, and close ventilation system and guide air to windshield, thereby can realize carrying out defogging to it fast when windshield first defogging, and can prevent that windshield from fog repeatedly, can avoid the car to launch the noise that ventilation system carries out defogging repeatedly like this, also can play the effect that prevents glass defogging once more simultaneously.
Of course, in the difference of the temperature outside the automobile, it is not conventional to select one windshield defogging function corresponding to the temperature outside the automobile in advance from the existing various windshield defogging functions of the automobile to defog, and on the contrary, the selection and combination of different windshield defogging functions in different outside environments can realize adaptive defogging, and meanwhile, the riding experience of the current in-automobile user is ensured, and extra environmental interference, such as noise interference, in-automobile temperature interference and the like, brought to the user due to defogging is reduced as much as possible.
In this embodiment, when the car has the temperature of rising windshield surface temperature and leads air to two kinds of windshield defogging functions of windshield, can confirm the current environmental type of predetermineeing that is located of car through detecting the outer temperature of car to according to the difference of predetermineeing environmental type, open the windshield defogging function that predetermineeing environmental type corresponds respectively and carry out defogging, this kind is according to the scheme of the automatic windshield defogging function of selecting of outer temperature of car, not only can self-adaptation defogging, but also can consider the travelling comfort of in-car environment for the defogging of car is more intelligent.
In step S203, the current temperature of the windshield refers to the current temperature of the windshield. The humidity in the vehicle includes, but is not limited to, the relative humidity of the air in the vehicle, and the humidity sensor mounted on the vehicle is preferably a relative hygrometer. The relative humidity may be a detection value of one humidity sensor, or may be an average value of detection values of a plurality of humidity sensors installed at different positions of the automobile, which is not limited in the embodiment of the present application.
Of course, the manner of acquiring the humidity in the vehicle and the current temperature of the windshield is not limited to the above manner, and other manners may be adopted to acquire the humidity in the vehicle and the current temperature, which is not limited in this application.
In the step S204, the manner of adjusting the defogging strength according to the humidity in the vehicle and the current temperature of the windshield is not unique, and specifically, the defogging strength adjustment manner corresponding to different defogging functions of the windshield will also be different. For example, when air is guided to a windshield for defogging using a ventilation system of an automobile, adjustment of defogging strength can be achieved by adjusting the air output of the air; when defogging is performed using an elevated windshield surface temperature, the adjustment of the defogging strength can be achieved by adjusting the power of the elevated heating element.
In some embodiments, in step S204, the humidity in the vehicle and the temperature of the windshield are input into a preset calculation model to obtain the adjustment parameters of the defogging strength, including: the preset calculation model comprises a condensation temperature calculation formula, wherein the humidity in the automobile and the temperature of the windshield are input into the condensation temperature calculation formula of the windshield, and the condensation temperature of the windshield of the automobile is obtained; calculating a temperature difference between the windshield temperature and the condensation temperature; and determining a target temperature interval corresponding to the condensation temperature according to a plurality of temperature intervals predetermined by the temperature difference, wherein the target temperature interval is one of the plurality of temperature intervals, and taking an air quantity adjusting gear corresponding to the target temperature interval as a target adjusting parameter of defogging strength, and the plurality of temperature intervals are in one-to-one correspondence with a plurality of air quantity adjusting gears of a ventilation system of the automobile for guiding air to a windshield.
Specifically, in this embodiment, the preset calculation model is preferably a condensation temperature calculation formula, where the specific implementation of the condensation temperature calculation formula is not unique.
For example, the dew point calculation formula is:
in the above formula (1), t d Indicating the condensation temperature, t n Indicating temperatureThe degree constant, t, represents the current temperature, RH represents the relative humidity, k represents the correction coefficient, and m represents the temperature coefficient. In the process of guiding air to a windshield for defrosting by starting a ventilation system of an automobile, detecting the change of temperature and humidity, and inputting the detected humidity (namely relative humidity) in the automobile and the current temperature of the windshield into the dew condensation temperature calculation formula (1), so that the corresponding dew condensation temperature can be calculated.
After the dew point temperature is obtained, the temperature difference is calculated according to the following formula (2):
Δt＝t-t d ……(2)；
wherein Δt represents the temperature difference.
In one embodiment, a plurality of temperature intervals may be pre-divided according to temperature differences, including but not limited to: (2.0 Δt, ++, (1.5 Δt, +, (1.2 Δt,1.5 Δt ], (Δt,1.2 Δt ], (0.8 Δt, Δt ] and (- ++0.8 Δt ], a total of six temperature intervals.) the air output amount of air directed to the windshield can be preset to six air volume adjustment gears, for example, the six air volume adjustment gears are respectively a first gear, a second gear, a third gear, a fourth gear, a fifth gear and a stop gear, wherein the air output amount of the first gear is 20%, the air output amount of the second gear is 40%, the air output amount of the third gear is 60%, the air output amount of the fourth gear is 80% and the air output amount of the fifth gear is 100%, and the stop gear is to close the ventilation system to direct air to the windshield.
When t d >2.0 delta t, opening to guide air to the windshield and controlling the air quantity adjusting gear to be five gears;
when 1.2 Deltat < t d When the air quantity is less than or equal to 1.5 delta t, opening to guide air to the windshield and controlling the air quantity adjusting gear to be a fourth gear;
when 1.2 Deltat < t d When the air quantity is less than or equal to 1.5 delta t, opening to guide air to the windshield and controlling the air quantity adjusting gear to be a third gear;
when Deltat < t d When the air quantity is less than or equal to 1.2 delta t, opening to guide air to the windshield and controlling the air quantity adjusting gear to be a second gear;
when 0.8 delta t < t d When delta t is less than or equal to delta t, the valve is openedGuiding air to a windshield and controlling an air quantity adjusting gear to be a first gear;
when t d At less than or equal to 0.8 Δt, the air is directed to the windshield is shut off.
On the basis of the present embodiment, in the step S205, adjusting the defogging strength of the defogging function of the windshield based on the target adjustment parameter includes:
the method comprises the steps of adjusting an air quantity adjusting gear of an automobile ventilation system for guiding air to a windshield to an air quantity adjusting gear corresponding to a target temperature interval, and controlling the air quantity guided to the windshield; wherein, this control opens windshield defogging function of car and carries out defogging includes: the ventilation system of the automobile is controlled to guide air, including cold air and hot air, to the windshield for blowing defogging.
Specifically, the amount of air output to direct air to the windshield may be controlled by a ventilation system, while the air directed to the windshield may be separated into cold air and hot air with the aid of an air conditioning system. When the air conditioning system of the automobile is in a refrigerating mode, the automobile is cold air; in contrast, when the air conditioning system of the automobile is in a heating mode, it is hot air.
According to the embodiment, the dew condensation temperature and the temperature difference of the windshield are calculated in real time by detecting the humidity in the vehicle and the current temperature change of the windshield, then the air quantity adjusting gear of the automobile ventilation system for guiding air to the glass is determined according to the dew condensation temperature and the temperature difference, namely, the adjusting parameter of the defogging strength is adjusted, the self-adaptive control of the defogging strength is realized, and the intelligent automobile ventilation system is quite intelligent.
In some embodiments, in the step S204, the humidity in the vehicle and the temperature of the windshield are input into a preset calculation model to obtain the adjustment parameters of the defogging strength, which includes: calculating a temperature difference between the current temperature of the windshield and the target temperature according to the target temperature of the windshield; calculating a humidity difference between the humidity in the vehicle and the target humidity according to the target humidity of the windshield; and calculating a weighted sum according to the preset weights of the temperature difference and the humidity difference to obtain the temperature heating intensity of the windshield, and taking the temperature heating intensity as a target regulation parameter of the defogging intensity.
Specifically, the target humidity and target temperature of the windshield are "ideal humidity" and "ideal temperature", respectively, which are ideal conditions with respect to preventing the windshield from fogging or frosting. The two are not specific fixed values, but are set according to actual requirements and user experience. These values are typically determined by the vehicle manufacturer in designing the heating and defogging devices for the vehicle and may be affected by a variety of factors such as weather conditions, vehicle interior design, user feedback, and the like.
For example, the following is an example of calculating the target conditioning parameter based on the humidity in the vehicle and the current temperature of the windshield: assuming that the temperature sensor measures the temperature of the windshield surface as T, the humidity sensor measures the humidity in the vehicle (for example, the above-mentioned relative humidity) as H.
Then, it can be calculated according to the following calculation formula (3):
temperature heating intensity=k1 (H Target object —H Actual practice is that of )+K2(T Target object —T Actual practice is that of )……(3)；
Wherein H is Target object To set target humidity, H Actual practice is that of For actual humidity (i.e. measured relative humidity), T Target object To set target temperature, T Actual practice is that of For the actual temperature, K1 and K2 are adjustment coefficients, which are generally constant and can be adjusted according to the actual situation, for controlling the influence of humidity and temperature on the heating intensity of the temperature. In practice, the heating intensity may be limited to a reasonable range, for example, temperature heating intensity=max (0, min (1, temperature heating intensity)), i.e., the target adjustment parameter is limited to between 0 and 1.
The present embodiment more intelligently prevents mist formation on the windshield by taking into account the differences in the target humidity and target temperature, as well as the actual humidity and temperature, when the actual humidity or temperature deviates from the set target value, the temperature heating intensity (i.e., for heating temperature adjustment) is adjusted accordingly (e.g., the heating intensity is increased when the actual humidity is lower than the target humidity; the heating intensity is also increased when the actual temperature is lower than the target temperature).
Next, based on the present embodiment, step S205 described above adjusts the defogging strength of the windshield defogging function based on the target adjustment parameter, including: the defogging function of the windshield comprises the steps of utilizing a heating element to increase the surface temperature of the windshield, and calculating the product of a target adjusting parameter and the rated working power according to the rated working power of the heating element corresponding to the surface temperature of the windshield to obtain the target working power; the operating power of the heating element is adjusted to a target operating power.
Specifically, the rated working power of the heating element is generally a fixed value, and the target adjusting parameter is in a range between 0 and 1, so that the target adjusting parameter is multiplied by the rated working power, the size of the working power of the heating element can be adjusted, namely the temperature heating intensity is changed, and the self-adaptive adjustment of the defogging intensity is realized.
Any combination of the above optional solutions may be adopted to form an optional embodiment of the present application, which is not described herein in detail.
The following are device embodiments of the present application, which may be used to perform method embodiments of the present application. For details not disclosed in the device embodiments of the present application, please refer to the method embodiments of the present application.
Fig. 4 is a schematic view of a defogging device for a windshield of an automobile according to an embodiment of the present application. As shown in fig. 4, the defogging device for a windshield of an automobile includes:
a fogging recognition module 401 configured to capture an image of an automobile windshield, and recognize the image by using an image recognition algorithm to determine a fogging condition of the automobile windshield;
a defogging control module 402 configured to control turning on a defogging function of a windshield of the automobile to defog if a windshield of the automobile is recognized to have a fog;
a glass parameter module 403 configured to obtain the in-vehicle humidity and the windshield temperature during defogging;
the parameter calculation module 404 is configured to input the humidity in the vehicle and the temperature of the windshield into a preset calculation model to obtain the adjustment parameter of the defogging strength;
a defogging adjustment module 405 configured to adjust a defogging strength of a windshield defogging function based on the adjustment parameter.
According to the technical scheme that this application embodiment provided, whether the image through shooting windshield automatic identification glass fogs, and the windshield defogging function of automatic start car carries out the defogging when the windshield appears fogging, simultaneously in defogging process, can also adjust the intensity of defogging according to humidity in the car and windshield temperature self-adaptation, consequently the method that this application embodiment provided need not the manual work and carries out the defogging, can open defogging automatically when glass fogs and adjust the intensity of defogging according to humidity in the car and windshield temperature self-adaptation, very intelligent, avoided the manual work frequently to operate or not know the risk that the glass defogging function was probably led to so that in-process people of driving of car has improved the security of car.
In some embodiments, the parameter calculation module 404 is specifically configured to input the humidity in the vehicle and the temperature of the windshield into a condensation temperature calculation formula of the windshield, so as to obtain the condensation temperature of the windshield of the vehicle, where the preset calculation model includes the condensation temperature calculation formula; calculating a temperature difference between the windshield temperature and the condensation temperature; and determining a target temperature interval corresponding to the condensation temperature according to a plurality of temperature intervals predetermined by the temperature difference, wherein the target temperature interval is one of the plurality of temperature intervals, and taking an air quantity adjusting gear corresponding to the target temperature interval as a target adjusting parameter of defogging strength, and the plurality of temperature intervals are in one-to-one correspondence with a plurality of air quantity adjusting gears of a ventilation system of the automobile for guiding air to a windshield.
Next, the defogging adjustment module 405 is specifically configured to adjust an air volume adjustment gear for guiding air to the windshield by the automobile ventilation system to an air volume adjustment gear corresponding to the target temperature range, and control an air volume to be guided to the windshield; wherein, this control opens windshield defogging function of car and carries out defogging includes: the ventilation system of the automobile is controlled to guide air, including cold air and hot air, to the windshield for blowing defogging.
In some embodiments, the parameter calculation module 404 is specifically configured to calculate a temperature difference between the current temperature of the windshield and the target temperature based on the target temperature of the windshield; calculating a humidity difference between the humidity in the vehicle and the target humidity according to the target humidity of the windshield; and determining the temperature heating intensity of the windshield according to the weighted sum of the temperature difference and the humidity difference, and taking the temperature heating intensity as a target regulation parameter of defogging intensity.
Next, the defogging adjustment module 405 is specifically configured to calculate a product of the target adjustment parameter and the rated operating power according to the rated operating power of the heating element corresponding to the temperature of the surface of the windshield to obtain the target operating power, where the defogging function of the windshield includes heating the surface temperature of the windshield with the heating element; the operating power of the heating element is adjusted to a target operating power.
In some embodiments, the defogging control module 402 is further configured to continuously capture an image of the windshield of the automobile after controlling to turn on the defogging function of the windshield of the automobile to defog, and identify the image by using an image identification algorithm to determine a fogging condition of the windshield of the automobile; and if no fog is detected on the windshield of the automobile, controlling to close the defogging function of the windshield of the automobile.
In some embodiments, the defogging control module 402 is further configured to identify an off-board temperature of the vehicle; determining the current preset environment type of the automobile according to the outside temperature, wherein the preset environment type at least comprises two types, and each preset environment type corresponds to at least one outside temperature; according to the current preset environment type of the automobile, a corresponding windshield defogging function is started to defog, the automobile comprises at least two windshield defogging functions, and each preset environment type corresponds to one windshield defogging function.
In some embodiments, the preset environment types include a low temperature environment and a high temperature environment, the low temperature environment and the high temperature environment corresponding to two different temperature ranges, respectively; the defogging control module 402 is specifically configured to control to turn on a heating element corresponding to the surface temperature of the windshield to perform glass heating defogging when the automobile is in a low-temperature environment; when the automobile is in a high-temperature environment, controlling to start an automobile ventilation system to guide air to a windshield for blowing and defogging glass; wherein, this windshield defogging function includes that the surface temperature of rising windshield carries out glass heating defogging and guides the air to the windshield and carries out glass blowing defogging.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic of each process, and should not limit the implementation process of the embodiment of the present application in any way.
Fig. 5 is a schematic structural diagram of an automobile according to an embodiment of the present application. As with fig. 1 and 5, the vehicle 500 of this embodiment has at least one windshield defogging function and includes a sensor 100, a controller 200, a memory 400, and a computer program 600 stored in the memory 400 and operable on the processor, the controller 200 being coupled to both the sensor 100 and the memory 400 and being capable of performing the steps of the various method embodiments described above when the controller 200 executes the computer program 600 to adaptively control the at least one windshield defogging function; or the functions of the modules in the apparatus embodiments described above are implemented when the controller 200 executes the computer program 600, to adaptively control the at least one windshield defogging function.
The sensor 100 may include, but is not limited to, the visual sensor, humidity sensor, and temperature sensor of fig. 1.
The controller 200 may be an electronic device such as a processor, microcomputer system, or the like. The processor may be a central processing unit (Central Processing Unit, CPU), or other general purpose processor, digital signal processor (Digital Signal Processor, DSP), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), field programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like.
The memory 400 may be an internal storage unit of the controller 200, for example, a hard disk or a memory of the controller 200. The memory 400 may also be an external storage device of the controller 200, for example, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash Card (Flash Card) or the like, which are provided on the controller 200. Memory 400 may also include both internal storage units and external storage devices of controller 200. The memory 400 is used to store the computer program 600 and other programs and data required for windshield defogging control.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional modules is illustrated, and in practical application, the above-described functional allocation may be performed by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional modules in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit.
The integrated module, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium (e.g., a computer readable storage medium). Based on such understanding, the present application implements all or part of the flow in the methods of the above embodiments, or may be implemented by a computer program to instruct related hardware, and the computer program may be stored in a computer readable storage medium, where the computer program may implement the steps of the respective method embodiments described above when executed by a processor. The computer program may comprise computer program code, which may be in source code form, object code form, executable file or in some intermediate form, etc. The computer readable storage medium may include: any entity or device capable of carrying computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (10)
1. A method of defogging a windshield of an automobile, comprising:
shooting an image of an automobile windshield, identifying the image by utilizing an image identification algorithm, and determining the fog situation of the automobile windshield;
if the automobile windshield is recognized to be fogged, controlling to start a defogging function of the automobile windshield to defog;
acquiring the humidity in the vehicle and the current temperature of the windshield in the defogging process;
inputting the humidity in the vehicle and the current temperature of the windshield into a preset calculation model to obtain the adjustment parameters of defogging strength;
and adjusting the defogging strength of a defogging function of the windshield based on the adjustment parameter.
2. The method of claim 1, wherein inputting the humidity in the vehicle and the temperature of the windshield into a predetermined calculation model yields adjustment parameters for the defogging strength, comprising:
the preset calculation model comprises a condensation temperature calculation formula, and the humidity in the automobile and the temperature of the windshield are input into the condensation temperature calculation formula of the windshield to obtain the condensation temperature of the windshield of the automobile;
calculating a temperature difference between the windshield temperature and the condensation temperature;
and determining a target temperature interval corresponding to the condensation temperature according to a plurality of temperature intervals predetermined by the temperature difference, wherein the target temperature interval is one of the plurality of temperature intervals, and taking an air quantity adjusting gear corresponding to the target temperature interval as a target adjusting parameter of defogging strength, and the plurality of temperature intervals are in one-to-one correspondence with a plurality of air quantity adjusting gears of a ventilation system of the automobile for guiding air to a windshield.
3. The method of claim 2, wherein adjusting a defogging strength of a windshield defogging function based on the target adjustment parameter comprises:
the method comprises the steps of adjusting an air quantity adjusting gear of an automobile ventilation system for guiding air to a windshield to an air quantity adjusting gear corresponding to a target temperature interval, and controlling the air quantity guided to the windshield;
wherein, control opening the windshield defogging function of car and defogging includes: the ventilation system of the automobile is controlled to guide air, including cold air and hot air, to the windshield for blowing defogging.
4. The method of claim 2, wherein inputting the humidity in the vehicle and the temperature of the windshield into a predetermined calculation model yields adjustment parameters for the defogging strength, comprising:
calculating a temperature difference between the current temperature of the windshield and the target temperature according to the target temperature of the windshield;
calculating a humidity difference between the humidity in the vehicle and the target humidity according to the target humidity of the windshield;
and determining the temperature heating intensity of the windshield according to the weighted sum of the temperature difference and the humidity difference, and taking the temperature heating intensity as a target adjusting parameter of the defogging intensity.
5. The method of claim 4, wherein adjusting a defogging strength of a windshield defogging function based upon the target adjustment parameter comprises:
the defogging function of the windshield comprises the steps of utilizing a heating element to increase the surface temperature of the windshield, and calculating the product of a target adjusting parameter and the rated working power according to the rated working power of the heating element corresponding to the surface temperature of the windshield to obtain the target working power;
the operating power of the heating element is adjusted to a target operating power.
6. The method according to claim 1, wherein after the defogging function of the windshield of the automobile is controlled to be started for defogging, continuously shooting images of the windshield of the automobile, and identifying the images by utilizing an image identification algorithm to determine the defogging condition of the windshield of the automobile;
and if no fog is detected on the windshield of the automobile, controlling to close the defogging function of the windshield of the automobile.
7. The method of claim 1, wherein controlling the opening of the windshield defogging function of the vehicle to defog comprises:
identifying the temperature outside the automobile;
determining the current preset environment type of the automobile according to the outside temperature, wherein the preset environment types at least comprise two types, and each preset environment type corresponds to at least one outside temperature;
According to the current preset environment type of the automobile, a corresponding windshield defogging function is started to defog, the automobile comprises at least two windshield defogging functions, and each preset environment type corresponds to one windshield defogging function.
8. The method of claim 7, wherein the predetermined environment type includes a low temperature environment and a high temperature environment, the low temperature environment and the high temperature environment corresponding to two different temperature ranges, respectively;
according to the current environmental type that presets that is located of car, open the defogging function of corresponding windshield and carry out defogging, include:
when the automobile is in a low-temperature environment, controlling to start a heating element corresponding to the surface temperature of the windshield to heat and defog the glass;
when the automobile is in a high-temperature environment, controlling to start an automobile ventilation system to guide air to a windshield for blowing and defogging glass;
wherein, windshield defogging function includes that the surface temperature of rising windshield carries out glass heating defogging and guides the air to the windshield and carries out glass and bloies defogging.
9. A defogging device for a windshield of an automobile, comprising:
the fog recognition module is configured to shoot an image of the automobile windshield, recognize the image by utilizing an image recognition algorithm and determine the fog condition of the automobile windshield;
The defogging control module is configured to control starting a defogging function of the windshield of the automobile to defog if the windshield of the automobile is recognized to be fogged;
a glass parameter module configured to obtain an in-vehicle humidity and a windshield temperature during defogging;
the parameter calculation module is configured to input the humidity in the vehicle and the temperature of the windshield into a preset calculation model to obtain adjustment parameters of defogging strength;
and a defogging adjustment module configured to adjust a defogging strength of a defogging function of the windshield based on the adjustment parameter.
10. An automobile having at least one windshield defogging function and comprising a sensor, a controller, a memory, and a computer program stored in the memory and operable on the processor, the controller being connected to both the sensor and the memory and being capable of controlling the at least one windshield defogging function, wherein the processor, when executing the computer program, performs the steps of the method of any of claims 1 to 8.
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