A rearview mirror autonomous defogging method based on a vehicle-mounted central air source

Abstract

The application provides a rearview mirror autonomous defogging method based on a vehicle-mounted central gas source, belongs to the technical field of control, obtains a mirror surface fog concentration based on a sensor, and determines that the mirror surface fog concentration is in a rapid change state based on a maximum difference value of the mirror surface fog concentration in a detection period, and controls N gas nozzles to alternately spray gas based on a first control logic if the maximum difference value is greater than a preset target value. If the maximum difference value is less than or equal to the preset target value, it is determined that the mirror surface fog concentration is in a uniform change state, and the N gas nozzles are uniformly sprayed based on a second control logic. The rearview mirror autonomous defogging method based on the vehicle-mounted central gas source provided by the application adopts different gas spraying strategies according to different mirror surface fog states, can realize rapid defogging, and also protects the mirror as much as possible and prolongs the service life of the mirror.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of control, and in particular to a rearview mirror autonomous defogging method based on a vehicle-mounted central gas source. BACKGROUND

[0002] In the field of safe driving of vehicles, the rearview mirror defogging technology is of great significance to driving safety. Defogging is achieved by heating the resistance wire embedded in the back of the lens. However, it takes more than 40 seconds to reach the effective defogging temperature (about 50℃) of the mirror surface, which cannot cope with sudden heavy fog, or cannot defog in time when entering a tunnel or other environments with large temperature differences.

[0003] In related technologies, a continuous air injection scheme is used, which improves the response speed, but the continuous high-pressure airflow causes the mirror coating to peel off, and the continuous high-pressure airflow also causes the mirror surface to be locally supercooled, which can easily cause the mirror surface to crack over a long period of time, reducing the service life of the mirror surface. SUMMARY

[0004] The embodiments of the present application provide a rearview mirror autonomous defogging method based on a vehicle-mounted central gas source to improve the above problems.

[0005] To achieve the above purpose, the technical scheme is as follows:

[0006] In a first aspect, the embodiments of the present application propose a rearview mirror autonomous defogging method based on a vehicle-mounted central gas source, which is applicable to a rearview mirror autonomous defogging system. The autonomous defogging system includes a central gas source, a controller, a sensor, and an actuator. The actuator includes N gas nozzles arranged towards the mirror surface of the rearview mirror. The N gas nozzles are in communication with the central gas source and are used to spray nitrogen. The method is applicable to the controller and includes:

[0007] The mirror surface fog concentration is obtained based on the sensor, and the maximum difference of the mirror surface fog concentration in the detection period is obtained;

[0008] If the maximum difference is greater than a preset target value, it is determined that the mirror surface fog concentration is in a rapid change state, and the N gas nozzles are controlled based on a first control logic. The first control logic is:

[0009] The N gas nozzles are divided into a first nozzle group and a second nozzle group. The gas nozzles belonging to the first nozzle group and the gas nozzles belonging to the second nozzle group are alternately arranged;

[0010] The gas nozzles belonging to the first nozzle group and the gas nozzles belonging to the second nozzle group are controlled to alternately spray the gas source gas in an execution period. The gas pressure during spraying is a first average pressure, and the execution period is a period after the detection period;

[0011] If the maximum difference is less than or equal to the preset target value, it is determined that the mirror surface mist concentration is in a uniform change state, and the N gas nozzles are controlled based on a second control logic, the second control logic being:

[0012] The N gas nozzles are controlled to spray the gas source gas at a second average pressure at the execution period, wherein the second average pressure is less than the first average pressure.

[0013] In combination with the first aspect, as an implementation form, the sensor includes a light source and a receiver, the mirror surface mist concentration is acquired based on the sensor, and based on a maximum difference of the mirror surface mist concentration at the detection period, the following are included:

[0014] The light source emits detection light to the mirror surface, the receiver acquires the detection light, and a corresponding target polarization degree is determined;

[0015] A reference polarization degree is acquired, and the reference polarization degree is compared with the target polarization degree to acquire a difference polarization degree;

[0016] The mirror surface mist concentration is determined based on the difference polarization degree.

[0017] In combination with the first aspect, as an implementation form, the light source is an infrared light source.

[0018] In combination with the first aspect, as an implementation form, the method further includes:

[0019] The mirror surface temperature is acquired based on the sensor;

[0020] The gas nozzles belonging to the first nozzle group and the gas nozzles belonging to the second nozzle group are controlled to spray the gas source gas alternately at the execution period, wherein the gas pressure at the time of spraying is the first average pressure, and the execution period is a period after the detection period, including:

[0021] The value of the first average pressure is adjusted based on the mirror surface temperature, and if the mirror surface temperature is greater than a preset temperature value, the pressure value of the first average pressure is less than a preset maximum pressure value.

[0022] In combination with the first aspect, as an implementation form, the method further includes:

[0023] If the maximum difference is less than a preset minimum mirror surface mist concentration, it is determined that the mirror surface mist concentration is in a low concentration state;

[0024] When the mirror surface mist concentration is in the low concentration state, the N gas nozzles are controlled to be closed.

[0025] In combination with the first aspect, as an implementation form, the value of the first average pressure is adjusted based on the mirror surface temperature, wherein if the mirror surface temperature is less than a preset temperature value, the pressure value of the first average pressure is less than a preset maximum pressure value, including:

[0026] determine the value of the first average pressure based on the temperature gradient corresponding to the mirror surface temperature, wherein each temperature gradient corresponds to a pressure value, and the lower the temperature of the temperature gradient, the higher the corresponding pressure value.

[0027] In a second aspect, the embodiments of the present application further provide a vehicle-mounted central gas source system, comprising:

[0028] an air compressor;

[0029] a plurality of molecular sieve tanks in communication with the air compressor;

[0030] a plurality of gas storage tanks in communication with the molecular sieve tanks, wherein at least one of the gas storage tanks is used to store nitrogen; and

[0031] a valve group and a gas source controller connected to the valve group and the air compressor.

[0032] In a third aspect, the present application further provides a vehicle, comprising:

[0033] a vehicle body;

[0034] a vehicle-mounted central gas source system as described in the second aspect, the vehicle-mounted central gas source system being arranged in the vehicle body; and

[0035] a vehicle controller configured to execute the method for autonomous defogging of a rearview mirror based on a vehicle-mounted central gas source as described in the first aspect.

[0036] In a fourth aspect, the present application provides a system for autonomous defogging of a rearview mirror based on a vehicle-mounted central gas source, comprising a central gas source, a controller, a sensor, and an actuator, wherein the actuator comprises N gas nozzles arranged towards a mirror surface of the rearview mirror, the N gas nozzles being in communication with the central gas source and configured to spray nitrogen, and the system is configured to:

[0037] acquire a mirror surface fog concentration based on the sensor, and determine a maximum difference of the mirror surface fog concentration in a detection period;

[0038] if the maximum difference is greater than a preset target value, determine that the mirror surface fog concentration is in a rapid change state, and control the N gas nozzles based on a first control logic, wherein the first control logic comprises:

[0039] dividing the N gas nozzles into a first nozzle group and a second nozzle group, and alternately arranging the gas nozzles belonging to the first nozzle group and the gas nozzles belonging to the second nozzle group;

[0040] controlling the gas nozzles belonging to the first nozzle group and the gas nozzles belonging to the second nozzle group to alternately spray the gas source gas in an execution period, wherein the gas pressure during spraying is a first average pressure, and the execution period is a period after the detection period;

[0041] If the maximum difference is less than or equal to the preset target value, it is determined that the mirror surface mist concentration is in a uniform change state, and the N gas nozzles are controlled based on a second control logic, the second control logic being:

[0042] The N gas nozzles are controlled to spray the gas source gas at a second average pressure at the execution period, wherein the second average pressure is less than the first average pressure.

[0043] In combination with the fourth aspect, in some embodiments, the system is configured to:

[0044] The sensor includes a light source and a receiver, and the mirror surface mist concentration is acquired based on the sensor, and based on a maximum difference of the mirror surface mist concentration at the detection period, including:

[0045] The light source emits detection light to the mirror surface, the receiver acquires the detection light, and a corresponding target polarization degree is determined;

[0046] A reference polarization degree is acquired, and the reference polarization degree is compared with the target polarization degree to acquire a difference polarization degree;

[0047] The mirror surface mist concentration is determined based on the difference polarization degree.

[0048] In combination with the fourth aspect, in some embodiments, the system is configured to:

[0049] The light source is an infrared light source.

[0050] In combination with the fourth aspect, in some embodiments, the system is configured to:

[0051] The mirror surface temperature is acquired based on the sensor;

[0052] The gas nozzles belonging to the first nozzle group and the gas nozzles belonging to the second nozzle group are controlled to spray the gas source gas at the execution period alternately, wherein the gas pressure at the time of spraying is the first average pressure, and the execution period is a period after the detection period, including:

[0053] The value of the first average pressure is adjusted based on the mirror surface temperature, and if the mirror surface temperature is greater than a preset temperature value, the pressure value of the first average pressure is less than a preset maximum pressure value.

[0054] In combination with the fourth aspect, in some embodiments, the system is configured to:

[0055] If the maximum difference is less than a preset minimum mirror surface mist concentration, it is determined that the mirror surface mist concentration is in a low concentration state;

[0056] When the mirror surface mist concentration is in the low concentration state, the N gas nozzles are controlled to be closed.

[0057] In combination with the fourth aspect, in some embodiments, the system is configured to:

[0058] adjusting the value of the first average pressure based on the mirror surface temperature, wherein if the mirror surface temperature is less than a preset temperature value, the pressure value of the first average pressure is less than a preset maximum pressure value, comprising:

[0059] determining the value of the first average pressure based on a temperature gradient corresponding to the mirror surface temperature, wherein each temperature gradient corresponds to a pressure value, and the lower the temperature gradient, the higher the corresponding pressure value.

[0060] The fifth aspect of the embodiment of the present application provides an electronic device, which comprises:

[0061] at least one processor; and a memory connected with the at least one processor in communication; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method provided in the first aspect of the embodiment of the present application.

[0062] The sixth aspect of the embodiment of the present application provides a computer readable storage medium, which stores a computer program, and the program is executed by a processor to implement the method provided in the first aspect of the embodiment of the present application.

[0063] In summary, the above method and device have the following technical effects:

[0064] The method for autonomous defogging of a rearview mirror based on a vehicle-mounted central gas source provided in the embodiment of the present application obtains the mirror surface fog concentration based on a sensor, and based on the maximum difference of the mirror surface fog concentration in a detection period, if the maximum difference is greater than a preset target value, it is determined that the mirror surface fog concentration is in a rapid change state, and N gas nozzles are controlled to alternately spray gas based on a first control logic. If the maximum difference is less than or equal to the preset target value, it is determined that the mirror surface fog concentration is in a uniform change state, and the N gas nozzles are controlled to uniformly spray gas based on a second control logic. The method for autonomous defogging of a rearview mirror based on a vehicle-mounted central gas source provided in the embodiment of the present application adopts different gas spraying strategies for different mirror surface fog states, which can realize rapid defogging while protecting the mirror as much as possible and prolonging the service life of the mirror. BRIEF DESCRIPTION OF DRAWINGS

[0065] Figure 1 FIG. 1 is a flowchart of the method for autonomous defogging of a rearview mirror based on a vehicle-mounted central gas source provided in the embodiment of the present application. DETAILED DESCRIPTION

[0066] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of the present application.

[0067] The embodiments of the present application provide a vehicle. The vehicle can be one of a fuel automobile, an electric automobile, a range-extender automobile and a hybrid automobile. The vehicle comprises a vehicle body, a power device and a vehicle-mounted central gas source system. The vehicle-mounted central gas source system is fixedly arranged on the vehicle body.

[0068] The vehicle-mounted central gas source system can comprise an air compressor, a plurality of molecular sieve tanks, a plurality of gas storage tanks, a valve group and a gas source controller. The molecular sieve tanks are in communication with the air compressor; the gas storage tanks are in communication with the molecular sieve tanks, wherein at least one of the gas storage tanks is used for storing nitrogen; and the gas source controller is connected with the valve group and the air compressor.

[0069] It can be understood that the air compressor serves as a gas source; the plurality of molecular sieve tanks are connected downstream of the air compressor and are responsible for separating nitrogen in air; the plurality of gas storage tanks are connected after the molecular sieve tanks and are used for storing the separated gas, wherein at least one of the gas storage tanks is specially used for storing high-purity nitrogen; the valve group is used for accurately controlling the flow direction and on-off of the gas among components; and the gas source controller serves as the brain of the system, connects and coordinates the actions of the valve group and the start-stop of the air compressor, and ensures that the whole system operates efficiently and reliably according to needs, thereby providing the required gas source for the vehicle.

[0070] The vehicle further comprises a vehicle controller for controlling the vehicle. In the embodiment, the vehicle controller can be used to execute a rearview mirror autonomous defogging method based on the vehicle-mounted central gas source. The method is also applicable to a rearview mirror autonomous defogging system, which comprises a central gas source, a controller, a sensor and an actuator. The actuator comprises N gas nozzles arranged towards a mirror surface. The N gas nozzles are in communication with the central gas source and are used for spraying nitrogen. The method is specifically executed by the controller.

[0071] Specifically, please refer to Figure 1 The method can comprise the following steps:

[0072] S101: obtaining a mirror surface fog concentration based on the sensor, and obtaining a maximum difference of the mirror surface fog concentration in a detection period.

[0073] It can be understood that the fog concentration of the vehicle rearview mirror is an important factor affecting the safety of the vehicle. In the present embodiment, by spraying nitrogen generated by the central gas source to the rearview mirror surface, the evaporation of the fog can be accelerated, and the fog on the mirror surface can be reduced. Therefore, first of all, the concentration of the mirror surface fog needs to be determined by the sensor.

[0074] Since the specific value of the mirror surface fog fluctuates in real time during the operation of the vehicle, in the present embodiment, the difference between the maximum value and the minimum value of the mirror surface concentration in a detection period can be used to determine the specific jet logic.

[0075] As for how to obtain the mirror surface concentration, in the present embodiment, it can be determined by monitoring the polarization degree of the mirror surface. The higher the polarization degree, the more serious the effect of the fog. It can be understood that the fog is essentially a small water droplet (1-100 μm in diameter) suspended in the air and attached to the mirror surface, which will cause the polarization characteristics to change, that is, destroy the polarization state of the reflected light of the mirror surface. The small water droplets in the fog cause multiple scattering, destroy the coherence of the light, and reduce the polarization degree.

[0076] It can be understood that when light is incident on a smooth mirror surface, the reflected light will maintain a high polarization state, that is, the vibration direction of most of the light will remain consistent in a certain direction. The small water droplets in the fog will destroy this directional reflection, causing the light to scatter in multiple directions, resulting in a decrease in the polarization degree of the reflected light, that is, degenerate into a non-polarization state.

[0077] Therefore, as an embodiment, the sensor includes a polarized light source and a receiver. The polarized light source is used to emit light of a certain polarization direction (such as 0° linearly polarized light). In the present embodiment, near-infrared or infrared light is used for the wavelength to avoid interfering with the driver.

[0078] The receiver can be a multi-directional polarization sensor array composed of multiple photoelectric sensors, each sensor being placed in front of a polarization filter of different angles, for example, including 0°, 45°, 90°, and 135° directions. The polarized light source can irradiate the mirror surface in a pulsed manner, and the multi-directional polarization sensor array synchronously captures the reflected light signal to obtain the light intensity values of the four polarization directions (0°, 45°, 90°, and 135°).

[0079] Then, the first three components of the Stokes vector are calculated using the light intensity values of the four directions: that is, the total light intensity, the difference between the light intensities of 0° and 90° directions, and the difference between the light intensities of 45° and 135° directions. Exemplary:

[0080] Total light intensity =

[0081] Difference between light intensities of 0° and 90° directions =

[0082] 45° and 135° direction light intensity difference

[0083] The degree of polarization (DoP) is determined by the following formula:

[0084] DoP = 1 - (Imin / Imax)

[0085] This value ranges between 0 (completely non-polarized) to 1 (completely polarized). It can be understood that, in the clean mirror state, due to the high reflection characteristics of the metal coating, the DoP will be close to 0.8 or above. When fog forms, the DoP value will decrease significantly. Each time the vehicle is started, the DoP reference value can be automatically updated when the mirror surface is confirmed to be clean.

[0086] S102: If the maximum difference is greater than the preset target value, it is determined that the mirror fog concentration is in a rapid change state, and the N gas nozzles are controlled based on a first control logic, the first control logic being:

[0087] The N gas nozzles are divided into a first nozzle group and a second nozzle group, and the gas nozzles belonging to the first nozzle group and the gas nozzles belonging to the second nozzle group are alternately arranged;

[0088] The gas nozzles belonging to the first nozzle group and the gas nozzles belonging to the second nozzle group are alternately sprayed with gas source gas in an execution period, and the gas pressure during spraying is a first average pressure, and the execution period is a period after the detection period.

[0089] It can be understood that when the mirror fog concentration is detected to be in a rapid change state (i.e., the maximum difference > the preset target value), it is in a rapid fogging state, for example, entering a tunnel or the like. At this time, rapid defogging is required. However, directly increasing the spraying pressure may cause cracking and other phenomena caused by sudden temperature drop of the mirror surface. Continuous high-pressure airflow causes local temperature of the mirror surface to change suddenly, and micro-cracks are generated in the glass due to the difference in thermal expansion coefficient. Therefore, in this embodiment, the first control strategy can be to use an alternating spraying method.

[0090] For example, the N gas nozzles are divided into a first nozzle group (Group A) and a second nozzle group (Group B), and adjacent nozzles belong to different groups, such as A-B-A-B alternating arrangement. In the actual spraying process, the first nozzle group and the second nozzle group are alternately sprayed, maintaining the mirror surface temperature in the dew point critical region, while the alternating spraying forms a dynamic vortex field on the mirror surface, enhancing the airflow coverage. It can quickly defog while avoiding damage to the glass.

[0091] ​When the current temperature of the mirror surface is low, a stronger spraying effect is needed to achieve the defogging function. Therefore, in the embodiment, the mirror surface temperature can also be obtained based on the sensor. When the mirror surface temperature is greater than a preset temperature value, the pressure value of the first average pressure can be limited, for example, when the mirror surface temperature is greater than the preset temperature value, the pressure value of the first average pressure is less than the preset maximum pressure value, further reducing the damage to the mirror surface.

[0092] Of course, in the actual spraying process, the value of the first average pressure can also be determined based on the temperature gradient corresponding to the mirror surface temperature, wherein each temperature gradient corresponds to a pressure value, and the lower the temperature gradient, the higher the corresponding pressure value.

[0093] S103: If the maximum difference is less than or equal to the preset target value, it is determined that the mirror surface mist concentration is in a uniform change state, and N gas nozzles are controlled based on a second control logic, and the second control logic is:

[0094] The N gas nozzles are controlled to spray the gas source gas at a second average pressure at the same time in the execution cycle, wherein the second average pressure is less than the first average pressure.

[0095] It can be understood that in the embodiment, if the maximum difference is less than or equal to the preset target value, it is determined that the mirror surface mist concentration is in a uniform change state, at this time the vehicle can be in a normal driving state. At this time, all N nozzles are synchronously opened to spray gas at a lower pressure, so that the temperature of the mirror surface remains consistent, which can remove the mist while keeping the mirror surface temperature consistent to avoid local overcooling and cause the mirror surface to crack.

[0096] Optionally, if the maximum difference is less than the preset minimum mirror surface mist concentration, it is determined that the mirror surface mist concentration is in a low concentration state, at this time defogging is not needed. Therefore, when the mirror surface mist concentration is in a low concentration state, the N gas nozzles are controlled to be closed.

[0097] The application embodiment proposes a rearview mirror autonomous defogging method based on a vehicle-mounted central gas source, the mirror surface mist concentration is obtained based on a sensor, and based on the maximum difference of the mirror surface mist concentration in the detection cycle, if the maximum difference is greater than a preset target value, it is determined that the mirror surface mist concentration is in a rapid change state, and N gas nozzles are controlled to spray gas alternately based on a first control logic. If the maximum difference is less than or equal to the preset target value, it is determined that the mirror surface mist concentration is in a uniform change state, and N gas nozzles are controlled to spray gas uniformly based on a second control logic. The application embodiment proposes a rearview mirror autonomous defogging method based on a vehicle-mounted central gas source, different gas spraying strategies are adopted for different mirror surface mist states, which can achieve rapid defogging while protecting the mirror as much as possible and prolonging the service life of the mirror.

[0098] Based on the same inventive concept, the embodiment of the present application also proposes a rearview mirror self-defogging system based on a vehicle-mounted central gas source, characterized in that it comprises a central gas source, a controller, a sensor, and an actuator, the actuator comprises N gas nozzles arranged towards a mirror surface, the N gas nozzles are in communication with the central gas source and are used for spraying nitrogen, and the system is configured to:

[0099] acquire the mirror surface fog concentration based on the sensor, and determine the maximum difference of the mirror surface fog concentration in a detection period;

[0100] if the maximum difference is greater than a preset target value, it is determined that the mirror surface fog concentration is in a rapid change state, and the N gas nozzles are controlled based on a first control logic, the first control logic is:

[0101] the N gas nozzles are divided into a first nozzle group and a second nozzle group, the gas nozzles belonging to the first nozzle group and the gas nozzles belonging to the second nozzle group are alternately arranged;

[0102] the gas nozzles belonging to the first nozzle group and the gas nozzles belonging to the second nozzle group are controlled to alternately spray the source gas in an execution period, wherein the gas pressure during spraying is a first average pressure, and the execution period is a period after the detection period;

[0103] if the maximum difference is less than or equal to the preset target value, it is determined that the mirror surface fog concentration is in a uniform change state, and the N gas nozzles are controlled based on a second control logic, the second control logic control is:

[0104] the N gas nozzles are controlled to simultaneously spray the source gas at a second average pressure in an execution period, wherein the second average pressure is less than the first average pressure.

[0105] In some embodiments, the system is configured to:

[0106] the sensor comprises a light source and a receiver, the mirror surface fog concentration is acquired based on the sensor, and the maximum difference of the mirror surface fog concentration in the detection period is determined, which comprises:

[0107] the light source emits a detection light to the mirror surface, the receiver acquires the detection light, and a corresponding target polarization degree is determined;

[0108] a reference polarization degree is acquired, and the reference polarization degree is compared with the target polarization degree to acquire a difference polarization degree;

[0109] the mirror surface fog concentration is determined based on the difference polarization degree.

[0110] In some embodiments, the system is configured to:

[0111] the light source is an infrared light source.

[0112] In some embodiments, the system is configured to:

[0113] acquire a mirror surface temperature based on a sensor;

[0114] control the gas injection nozzles belonging to the first nozzle group and the gas injection nozzles belonging to the second nozzle group to alternately inject the source gas in an execution period, wherein the gas pressure during injection is a first average pressure, and the execution period is a period after the detection period, including:

[0115] adjust the value of the first average pressure based on the mirror surface temperature, and if the mirror surface temperature is greater than a preset temperature value, the pressure value of the first average pressure is less than a preset maximum pressure value.

[0116] In some embodiments, the system is configured to:

[0117] if the maximum difference is less than a preset minimum mirror surface mist concentration, determine that the mirror surface mist concentration is in a low concentration state;

[0118] when the mirror surface mist concentration is in the low concentration state, control the N gas injection nozzles to be closed.

[0119] In some embodiments, the system is configured to:

[0120] adjust the value of the first average pressure based on the mirror surface temperature, wherein if the mirror surface temperature is less than a preset temperature value, the pressure value of the first average pressure is less than a preset maximum pressure value, including:

[0121] determine the value of the first average pressure based on the temperature gradient corresponding to the mirror surface temperature, wherein each temperature gradient corresponds to a pressure value, and the lower the temperature gradient, the higher the corresponding pressure value.

[0122] The embodiment of the present application proposes a rearview mirror autonomous defogging system based on a vehicle-mounted central gas source. The mirror surface mist concentration is acquired based on a sensor, and based on the maximum difference of the mirror surface mist concentration in a detection period, if the maximum difference is greater than a preset target value, it is determined that the mirror surface mist concentration is in a rapid change state, and N gas injection nozzles are controlled to alternately inject gas based on a first control logic. If the maximum difference is less than or equal to the preset target value, it is determined that the mirror surface mist concentration is in a uniform change state, and N gas injection nozzles are controlled to uniformly inject gas based on a second control logic. The embodiment of the present application proposes a rearview mirror autonomous defogging system based on a vehicle-mounted central gas source. By using different mirror surface mist states and different gas injection strategies, rapid defogging can be achieved while the mirror lens is protected as much as possible, prolonging the service life of the mirror lens.

[0123] Based on the same inventive concept, the embodiments of the present application also propose an electronic device, which includes:

[0124] At least one processor; and a memory connected with the at least one processor in communication; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method for autonomous defogging of a rearview mirror based on a vehicle-mounted central air source according to the embodiments of the present application.

[0125] In addition, to achieve the above-mentioned purpose, the embodiments of the present application further provide a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the method for autonomous defogging of a rearview mirror based on a vehicle-mounted central air source according to the embodiments of the present application.

[0126] The various constituent components of the electronic device will be specifically introduced as follows:

[0127] The processor is the control center of the electronic device, and can be one processor or a plurality of processing elements. For example, the processor is one or more central processing units (CPUs), application specific integrated circuits (ASICs), or one or more integrated circuits configured to implement the embodiments of the present application, such as one or more microprocessors (digital signal processors, DSPs), or one or more field programmable gate arrays (FPGAs).

[0128] Optionally, the processor can execute various functions of the electronic device by running or executing software programs stored in the memory and calling data stored in the memory.

[0129] The memory is used to store software programs for implementing the embodiments of the present application, and is controlled by the processor to execute. The specific implementation manner can refer to the above-mentioned method embodiments, and will not be described here.

[0130] Optionally, the memory can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM), or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, a magnetic disk storage or other magnetic storage devices, or any other medium capable of storing desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to this. The memory can be integrated with the processor or exist independently and be coupled to the processor through the interface circuit of the electronic device, and the embodiments of the present application do not make a specific limitation in this regard.

[0131] The transceiver is configured to communicate with the network device or the terminal device.

[0132] Optionally, the transceiver can include a receiver and a transmitter. The receiver is configured to implement the receiving function, and the transmitter is configured to implement the transmitting function.

[0133] Optionally, the transceiver can be integrated with the processor or exist independently and be coupled to the processor through the interface circuit of the router, and the embodiments of the present application do not make a specific limitation in this regard.

[0134] In addition, the technical effects of the electronic device can refer to the technical effects of the data transmission method of the above-mentioned method embodiments, which will not be repeated here.

[0135] It should be understood that the processor in the embodiments of the present application can be a central processing unit (CPU), and the processor can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0136] It should also be understood that the memory in the embodiments of the present application can be a volatile memory or a nonvolatile memory, or can include both volatile and nonvolatile memory. Among them, the nonvolatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM) used as an external cache. By way of example, and not limitation, a number of forms of random access memory (RAM) can be used, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchlink dynamic random access memory (SLDRAM), and direct rambus random access memory (DRRAM).

[0137] The above-described embodiments can be implemented in whole or in part by software, hardware (such as a circuit), firmware, or any combination thereof. When implemented in software, the above-described embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the flow or function according to the embodiments of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (such as infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that the computer can access or a data storage device such as a server, data center, etc. containing a set of one or more available media. The available media can be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium. The semiconductor medium can be a solid state disk.

[0138] It should be understood that the term "and / or" in this document is only used to describe the associated relationship of associated objects, which means that there can be three relationships, for example, A and / or B can represent three cases of A alone, A and B together, and B alone, where A and B can be singular or plural. In addition, the character " / " in this document generally represents an "or" relationship between the associated objects before and after it, but it can also represent an "and / or" relationship. The specific meaning can be understood according to the context before and after it.

[0139] In this application, "at least one" means one or more, and "multiple" means two or more. "At least one of the following" or the like means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can mean a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c can be single or multiple.

[0140] It should be understood that in various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of the processes should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0141] Those skilled in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed in this document can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

Claims

1. A method for autonomous defogging of rearview mirrors based on a vehicle-mounted central air source, characterized in that, An autonomous defogging system for a rearview mirror is provided. The system includes a central air source, a controller, sensors, and actuators. The sensors include a light source and a receiver. The actuators include N gas nozzles arranged facing the rearview mirror surface. These N gas nozzles are connected to the central air source and are used to spray nitrogen gas. The method applicable to the controller includes: The mirror temperature is obtained based on the sensor. The concentration of fog on the mirror surface is obtained based on the sensor, and the maximum difference in the concentration of fog on the mirror surface during the detection period includes: The light source emits detection light rays towards the mirror, the receiver acquires the detection light rays, and the corresponding target polarization degree is determined. Obtain a reference polarization degree and compare the reference polarization degree with the target polarization degree to obtain the difference polarization degree; The concentration of fog on the mirror surface is determined based on the degree of differential polarization. If the maximum difference is greater than the preset target value, then the concentration of the mirror fog is determined to be in a rapidly changing state, and N gas nozzles are controlled based on the first control logic, which is: The N gas nozzles are divided into a first nozzle group and a second nozzle group, and the gas nozzles belonging to the first nozzle group and the gas nozzles belonging to the second nozzle group are alternately arranged; The gas nozzles belonging to the first nozzle group and the gas nozzles belonging to the second nozzle group are controlled to alternately spray gas source gas during the execution cycle, wherein the gas pressure during spraying is a first average pressure, and the execution cycle is the cycle after the detection cycle, including: adjusting the pressure value of the first average pressure based on the mirror temperature, and if the mirror temperature is greater than a preset temperature value, then the pressure value of the first average pressure is less than a preset maximum pressure value. Based on the temperature gradient corresponding to the mirror temperature, the pressure value of the first average pressure is determined, wherein each temperature gradient corresponds to a pressure value, and the lower the temperature gradient, the higher the corresponding pressure value. If the maximum difference is less than or equal to the preset target value, then the concentration of the mirror fog is determined to be in a uniform variation state, and N gas nozzles are controlled based on the second control logic, which is: N gas nozzles are controlled to simultaneously inject the gas source gas at a second average pressure during the execution cycle, wherein the second average pressure is less than the first average pressure.

2. The method for autonomous defogging of rearview mirrors based on a vehicle-mounted central air source according to claim 1, characterized in that, The light source is an infrared light source.

3. The method for autonomous defogging of rearview mirrors based on a vehicle-mounted central air source according to claim 1, characterized in that, The method also includes: If the maximum difference is less than the preset minimum mirror fog concentration, then the mirror fog concentration is determined to be in a low concentration state. When the concentration of the fog on the mirror surface is at the low concentration state, control N of the gas nozzles to shut down.

4. A vehicle, characterized in that, include: Vehicle body; A vehicle-mounted central air supply system, wherein the vehicle-mounted central air supply system is installed in the vehicle body; as well as A vehicle controller for performing a rearview mirror autonomous defogging method based on an on-board central air source as described in any one of claims 1-3.

5. A rearview mirror autonomous defogging system based on a vehicle-mounted central air source, characterized in that, The system includes a central air source, a controller, sensors, and actuators. The sensors include a light source and a receiver. The actuators include N gas nozzles arranged facing the rearview mirror surface. These N gas nozzles are connected to the central air source and are used to inject nitrogen gas. The system is configured as follows: The mirror temperature is obtained based on the sensor. The concentration of fog on the mirror surface is obtained based on the sensor, and the maximum difference in the concentration of fog on the mirror surface during the detection period includes: The light source emits detection light rays towards the mirror, the receiver acquires the detection light rays, and the corresponding target polarization degree is determined. Obtain a reference polarization degree and compare the reference polarization degree with the target polarization degree to obtain the difference polarization degree; The concentration of fog on the mirror surface is determined based on the degree of differential polarization. If the maximum difference is greater than the preset target value, then the concentration of the mirror fog is determined to be in a rapidly changing state, and N gas nozzles are controlled based on the first control logic, which is: The N gas nozzles are divided into a first nozzle group and a second nozzle group, and the gas nozzles belonging to the first nozzle group and the gas nozzles belonging to the second nozzle group are alternately arranged; The gas nozzles belonging to the first nozzle group and the gas nozzles belonging to the second nozzle group are controlled to alternately spray gas source gas during the execution cycle, wherein the gas pressure during spraying is a first average pressure, and the execution cycle is the cycle after the detection cycle, including: adjusting the pressure value of the first average pressure based on the mirror temperature, and if the mirror temperature is greater than a preset temperature value, then the pressure value of the first average pressure is less than a preset maximum pressure value. Based on the temperature gradient corresponding to the mirror temperature, the pressure value of the first average pressure is determined, wherein each temperature gradient corresponds to a pressure value, and the lower the temperature gradient, the higher the corresponding pressure value. If the maximum difference is less than or equal to the preset target value, then the concentration of the mirror fog is determined to be in a uniform variation state, and N gas nozzles are controlled based on the second control logic, which is: N gas nozzles are controlled to simultaneously inject the gas source gas at a second average pressure during the execution cycle, wherein the second average pressure is less than the first average pressure.

6. An electronic device, characterized in that, include: At least one processor; And, a memory communicatively connected to at least one of the processors; The memory stores instructions that can be executed by at least one of the processors, which, when executed by at least one of the processors, enable the at least one of the processors to perform the method as described in any one of claims 1-3.

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