Automobile self-cleaning method, device and system, electronic equipment and storage medium

Abstract

The embodiment of the invention provides an automobile self-cleaning method and device, electronic equipment and a storage medium, and the method comprises the steps that deformation data of a piezoelectric sensor is collected, and the piezoelectric sensor is installed in a front windshield water chute; judging whether foreign matters exist in the front windshield water chute or not based on the deformation data; and under the condition that the foreign matter exists in the front windshield water chute, the blower motor is controlled to jet airflow through an air outlet formed in the outer side of the front windshield, and the airflow is used for washing the foreign matter in the front windshield water chute. The piezoelectric sensor is installed in the water chute of the front windshield, accumulation of foreign matter hidden in the water chute can be effectively detected, and after the foreign matter is detected, the air blowing motor can be automatically controlled to jet airflow for washing and cleaning, so that the potential safety hazard that the sight is blocked by airflow flying dust due to the fact that a driver cannot clean the foreign matter in time due to negligence is avoided; automatic pre-detection and cleaning when the vehicle is started are achieved, and the driving safety is remarkably improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of automobile safety technology, and in particular to an automobile self-cleaning method, device, system, electronic device, and storage medium. Background Art

[0002] Keeping your windshield clean is crucial for safe driving. If foreign objects like fallen leaves or plastic bags remain in the windshield's gutter or on the windshield's surface, they can be blown away by the airflow while the car is moving, obscuring the windshield or the camera's field of view and potentially causing an accident.

[0003] In the prior art, a camera can be used to collect image information of the front windshield surface, and a preset target tracking model can be used to determine whether there is a foreign object in the image information, and then the foreign object can be cleaned by manually triggering the wipers.

[0004] However, this method has a blind spot in foreign object detection and cannot identify the accumulation of foreign objects in the water guide channel of the front windshield. It also relies on the driver to manually trigger cleaning, which is a cumbersome operation. Due to the driver's negligence, the airflow and dust may block the view when the vehicle is started, posing a safety hazard. Summary of the Invention

[0005] The embodiments of the present application provide a vehicle self-cleaning method, device, system, electronic device, and storage medium, aiming to improve the problem that existing vehicle cleaning methods have blind spots in foreign object detection and rely on manual operation by the driver to trigger cleaning, which is cumbersome to operate and poses safety hazards.

[0006] The present invention provides a method for self-cleaning a car, comprising:

[0007] Collecting deformation data of a piezoelectric sensor installed in the water channel of the front windshield;

[0008] determining whether there is a foreign object in the water channel of the front windshield based on the deformation data;

[0009] When there is foreign matter in the water guide channel of the front windshield, the blower motor is controlled to spray airflow through an air outlet arranged on the outside of the front windshield, and the airflow is used to flush the foreign matter in the water guide channel of the front windshield.

[0010] As can be seen from the above, the solution provided by the embodiment of the present application, by installing a piezoelectric sensor within the windshield water channel, can effectively detect the accumulation of foreign matter hidden within the water channel. This solves the detection blind spot problem that exists in the prior art, which relies solely on cameras to observe the glass surface. Moreover, upon detecting foreign matter, the blower motor can be automatically controlled to spray air to flush and clean it, eliminating the need for manual operation by the driver. This not only simplifies the cleaning process and avoids the safety hazard of airflow and dust obstructing vision due to driver negligence and failure to clean in a timely manner, but also enables automatic pre-inspection and cleaning when the vehicle is started, significantly improving driving safety.

[0011] Optionally, the piezoelectric sensor is a flexible piezoelectric film sensor.

[0012] Optionally, when there is foreign matter in the windshield water channel, the method further includes:

[0013] determining a weight of the foreign object in the water channel of the front windshield based on the deformation data;

[0014] When the weight of the foreign object is greater than a first preset threshold, controlling the wiper motor to wipe the front windshield at a first frequency within a first duration;

[0015] When the weight of the foreign object is less than or equal to the first preset threshold, the wiper motor is controlled to wipe the front windshield at a second frequency within a second time period, the first frequency is higher than the second frequency, and the first time period is greater than the second time period.

[0016] Optionally, the method further includes:

[0017] Collecting an image to be detected within a target area, wherein the target area includes the interior of the windshield water channel and the windshield;

[0018] Performing target recognition on the image to be detected to determine the coverage rate of foreign matter in the image to be detected;

[0019] When the weight of the foreign object is greater than a first preset threshold, controlling the wiper motor to wipe the front windshield at a first frequency within a first time period includes:

[0020] When the weight of the foreign object is greater than a first preset threshold and / or the coverage rate of the foreign object is greater than a second preset threshold, controlling the wiper motor to wipe the front windshield at a first frequency for a first duration;

[0021] When the weight of the foreign object is less than or equal to the first preset threshold, controlling the wiper motor to wipe the front windshield at a second frequency for a second duration, wherein the first frequency is higher than the second frequency, includes:

[0022] When the weight of the foreign object is less than or equal to the first preset threshold and the foreign object coverage is less than or equal to the second preset threshold, the wiper motor is controlled to wipe the front windshield at a second frequency within a second time period, and the first frequency is higher than the second frequency.

[0023] Optionally, when the weight of the foreign object is greater than a first preset threshold, the method further includes:

[0024] Controlling the water pump to spray a preset volume of windshield washer fluid; and / or,

[0025] The diverter valve is controlled to close the air outlet on the inner side of the front windshield.

[0026] Optionally, after controlling the blower motor to eject airflow through an air outlet provided on the outside of the front windshield, the method further comprises:

[0027] Recording the number of times the airflow is injected, and determining whether the number reaches a threshold value;

[0028] If the number of times does not reach the number threshold, returning to the step of collecting deformation data of the piezoelectric sensor;

[0029] When the number reaches the number threshold, the current deformation data of the piezoelectric sensor is collected, and the foreign matter removal rate is determined based on the current deformation data. When the foreign matter removal rate is less than the cleaning threshold, a prompt message is sent to the user.

[0030] The present application also provides a self-cleaning device for a car, comprising:

[0031] An acquisition module, used to acquire deformation data of a piezoelectric sensor installed in the water channel of the front windshield;

[0032] a judgment module, configured to judge whether there is a foreign object in the water channel of the front windshield based on the deformation data;

[0033] The cleaning module is used to control the blower motor to spray air through the air outlet arranged on the outside of the front windshield when there is foreign matter in the water guide groove of the front windshield. The airflow is used to flush the foreign matter in the water guide groove of the front windshield.

[0034] The present application also provides a vehicle self-cleaning system, comprising:

[0035] The piezoelectric sensor built into the windshield water channel is used to collect deformation data;

[0036] A three-way diverter valve is installed in the air outlet pipe of the front windshield, wherein the inlet of the three-way diverter valve is connected to the blower motor, and the first outlet is connected to the air outlet located outside the front windshield.

[0037] Optionally, the three-way diverter valve further includes a second outlet, which is connected to an air outlet located on the inner side of the front windshield.

[0038] Optionally, a one-way guide plate and a waterproof cover are installed at the air outlet on the outer side of the front windshield.

[0039] An embodiment of the present application further provides an electronic device, including a processor and a memory, wherein:

[0040] Memory for storing computer programs;

[0041] A processor is configured to execute a program stored in a memory to implement any of the methods described in the preceding claims.

[0042] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, any of the above-mentioned methods is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a flow chart of a vehicle self-cleaning method provided by an embodiment of the present application;

[0044] Figure 2 This is a flow chart of a vehicle self-cleaning method provided by a specific embodiment of the present application;

[0045] Figure 3 This is an architectural diagram of a vehicle self-cleaning system provided by a specific embodiment of the present application;

[0046] Figure 4 This is a structural diagram of a car self-cleaning device provided in an embodiment of the present application;

[0047] Figure 5 This is a structural diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0048] In order to make the technical problems, technical solutions and beneficial effects solved by this application more clearly understood, this application is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0049] Cleaning the windshield is extremely important for safe driving. In related technologies, a camera can be used to collect image information of the windshield surface, and a preset target tracking model can be used to determine whether there are foreign objects in the image information, and then the foreign objects can be cleaned by manually triggering the wipers.

[0050] However, this method has a blind spot in foreign object detection and cannot identify the accumulation of foreign objects in the water guide channel of the front windshield. It also relies on the driver to manually trigger cleaning, which is a cumbersome operation. Due to the driver's negligence, the airflow and dust may block the view when the vehicle is started, posing a safety hazard.

[0051] Based on this, an embodiment of the present application provides a car self-cleaning method to solve the above problems.

[0052] An embodiment of the present application provides a method for self-cleaning a car, comprising:

[0053] Collecting deformation data of a piezoelectric sensor installed in the water channel of the front windshield;

[0054] determining whether there is a foreign object in the water channel of the front windshield based on the deformation data;

[0055] When there is foreign matter in the water guide channel of the front windshield, the blower motor is controlled to spray airflow through an air outlet arranged on the outside of the front windshield, and the airflow is used to flush the foreign matter in the water guide channel of the front windshield.

[0056] As can be seen from the above, the solution provided by the embodiment of the present application, by installing a piezoelectric sensor within the windshield water channel, can effectively detect the accumulation of foreign matter hidden within the water channel. This solves the detection blind spot problem that exists in the prior art, which relies solely on cameras to observe the glass surface. Moreover, upon detecting foreign matter, the blower motor can be automatically controlled to spray air to flush and clean it, eliminating the need for manual operation by the driver. This not only simplifies the cleaning process and avoids the safety hazard of airflow and dust obstructing vision due to driver negligence and failure to clean in a timely manner, but also enables automatic pre-inspection and cleaning when the vehicle is started, significantly improving driving safety.

[0057] Example 1

[0058] This application embodiment provides a method for self-cleaning a car, which is applied to a test machine. Please refer to Figure 1 , including the following steps:

[0059] S110: Collect deformation data of a piezoelectric sensor, where the piezoelectric sensor is installed in the water channel of the front windshield.

[0060] In this application, a piezoelectric sensor is installed inside the windshield's water channel, a location where foreign matter (such as fallen leaves and plastic bags) tends to accumulate. When foreign matter falls into or accumulates in the water channel, its weight exerts pressure on the bottom of the channel, causing the piezoelectric sensor to deform slightly. Piezoelectric materials have the property of converting mechanical deformation (pressure) into electrical signals. Therefore, the piezoelectric sensor installed in the water channel can convert these deformations caused by the weight of foreign matter into electrical signal data that can be processed by the system in real time.

[0061] In this step, when the vehicle completes the power-on operation, the detection mechanism can be triggered, and the piezoelectric sensor is started synchronously to collect real-time deformation data that may be caused by the presence of foreign objects in the area, providing a comprehensive and original detection basis for subsequent foreign object identification and classification, ensuring that the initial perception of foreign objects is not missed.

[0062] In one implementation, the piezoelectric sensor is a flexible piezoelectric film sensor.

[0063] In other words, flexible piezoelectric film sensors can be used to monitor foreign objects in the windshield water channel. Flexible piezoelectric film sensors are extremely flexible and can bend and conform like a film, allowing them to fit snugly on the bottom inner wall of the water channel. They can even be bent to fit the specific shape of the water channel, maximizing detection coverage and ensuring virtually no blind spots.

[0064] When light fallen leaves, plastic bags, or other debris fall into the gutter and accumulate on the sensor, even if these foreign objects are very light, weighing only a few tenths of a gram to a gram, the tiny pressure they generate can cause the soft film to deform. Because piezoelectric materials are inherently extremely sensitive to deformation, these tiny deformations can be accurately captured by the sensor and converted into corresponding electrical signals. This high sensitivity and good conformability enable the sensor to very reliably detect early or minor accumulations of foreign matter, making it possible to clean them promptly. Furthermore, the flexible film material is relatively indestructible and can adapt to the slight vibrations and humidity that may exist within the gutter, ensuring the durability and long-term stability of the sensor. Therefore, the use of flexible piezoelectric film sensors not only improves detection accuracy and coverage, but also enhances the reliability and adaptability of the entire self-cleaning system.

[0065] Specifically, the sensitivity range of the flexible piezoelectric film sensor can be set to 0.1g to 50g. This range accurately covers the weight range of common foreign objects. Whether it is a small leaf of 0.1g to 1g (such as pine needles and grass leaves), a medium-sized leaf of 1g to 5g (such as maple leaves and sycamore leaves), or even a large leaf of more than 10g (such as banana leaves and palm leaves), it can all be effectively sensed.

[0066] S120: Determine whether there is foreign matter in the water channel of the front windshield based on the deformation data.

[0067] In this step, the presence of foreign objects in the windshield water channel can be determined based on deformation data. Specifically, the system sets a deformation threshold, determined empirically or experimentally, representing the minimum pressure or deformation required to indicate the presence of foreign objects in the water channel. After receiving deformation data from the piezoelectric sensor, the collected deformation data can be compared with the deformation threshold.

[0068] If the actual deformation data exceeds the deformation threshold, the system determines that there is indeed a noticeable accumulation of foreign matter in the water channel. Conversely, if the deformation data is below the deformation threshold, the system determines that there is no noticeable foreign matter in the water channel, or the foreign matter is very light and does not pose a threat. In this way, the physical signal can be converted into clear "foreign matter present" or "no foreign matter" status information, providing a basis for subsequent execution instructions.

[0069] S130: When there is foreign matter in the water guide groove of the front windshield, the blower motor is controlled to spray air through the air outlet provided on the outside of the front windshield, and the air flow is used to flush the foreign matter in the water guide groove of the front windshield.

[0070] If foreign matter is trapped in the windshield's water channel, the blower motor is controlled to spray air through outlets located on the outside of the windshield, achieving self-cleaning action. The jetted airflow is not directed into the vehicle, but rather diverted through a specially designed duct, directing a portion of the airflow out of outlets strategically located on the outside of the windshield, near the water channel. The position and angle of the jetted air ensure that it directly impacts foreign matter within the water channel, using aerodynamic forces to dislodge, disperse, or flush it out of the channel, achieving the cleaning effect and preventing foreign matter from being lifted and obstructing vision when the vehicle is started.

[0071] In this way, the vehicle's existing blower system can be cleverly utilized without the need for additional complex equipment such as motors. This not only achieves automatic cleaning of the water trough without relying on manual operation by the driver, but also reduces safety hazards caused by human negligence and ensures ease of operation and cost-effectiveness.

[0072] As can be seen from the above, the solution provided by the embodiment of the present application, by installing a piezoelectric sensor within the windshield water channel, can effectively detect the accumulation of foreign matter hidden within the water channel. This solves the detection blind spot problem that exists in the prior art, which relies solely on cameras to observe the glass surface. Moreover, upon detecting foreign matter, the blower motor can be automatically controlled to spray air to flush and clean it, eliminating the need for manual operation by the driver. This not only simplifies the cleaning process and avoids the safety hazard of airflow and dust obstructing vision due to driver negligence and failure to clean in a timely manner, but also enables automatic pre-inspection and cleaning when the vehicle is started, significantly improving driving safety.

[0073] In step S130, when there is a foreign object in the water channel of the front windshield, the method further includes:

[0074] Determine the weight of foreign objects in the windshield water channel based on deformation data;

[0075] When the weight of the foreign object is greater than a first preset threshold, controlling the wiper motor to wipe the front windshield at a first frequency within a first duration;

[0076] When the weight of the foreign object is less than or equal to the first preset threshold, the wiper motor is controlled to wipe the front windshield at a second frequency within a second time period, the first frequency is higher than the second frequency, and the first time period is greater than the second time period.

[0077] Specifically, in this implementation, the system first determines the weight of the foreign object in the gutter based on the deformation data collected by the piezoelectric sensor. Since there's a clear correlation between the degree of deformation of the piezoelectric sensor and the weight of the foreign object—the heavier the foreign object, the greater the pressure on the sensor, and the more significant the deformation data—the system uses a pre-set calibration model to convert the deformation data into a specific foreign object weight, accurately quantifying the amount or size of the foreign object. Based on this, the system then adjusts the wiper motor's operating parameters based on a comparison of the foreign object's weight with a first preset threshold.

[0078] If the weight of the foreign object exceeds a first preset threshold, indicating a significant accumulation of foreign objects in the gutter or a heavy individual object (such as stacked leaves or a large plastic bag), the system will control the wiper motor to wipe the windshield at the first frequency for the first duration. Because the first frequency is higher than the second frequency and the first duration is longer than the second, this higher frequency and longer duration wipe mode delivers a stronger cleaning force, effectively addressing more severe foreign object situations and ensuring that foreign objects adhering to the glass surface or gutter edges are fully removed.

[0079] Conversely, if the weight of the foreign object is less than or equal to the first preset threshold, indicating that the foreign object in the gutter is relatively small or light (such as a small amount of fallen leaves or small debris), the system will control the wiper motor to wipe at the second frequency for the second duration. This relatively low-frequency and short-duration operation not only completes basic cleaning but also avoids unnecessary energy consumption and wiper wear, ensuring cleaning effectiveness while balancing economic efficiency and equipment life.

[0080] For example, the first frequency may be 80 times per minute, the second frequency may be a single sweep, the first duration may be 3 minutes, the second duration may be 1 minute, and so on, without specific limitation.

[0081] This design of dynamically adjusting the wiper working mode according to the weight of foreign objects makes the cleaning process more targeted, which not only improves the cleaning efficiency of foreign objects of different degrees, but also realizes the rational allocation of resources through differentiated control, further optimizing the practicality and reliability of the vehicle's self-cleaning system.

[0082] In one implementation, the method further includes:

[0083] Collect the image to be detected in the target area, which includes the front windshield water channel and the front windshield;

[0084] Perform target recognition on the image to be detected and determine the coverage rate of foreign matter in the image to be detected;

[0085] Then, when the weight of the foreign object is greater than a first preset threshold, controlling the wiper motor to wipe the front windshield at a first frequency within a first duration includes:

[0086] When the weight of the foreign object is greater than a first preset threshold and / or the coverage of the foreign object is greater than a second preset threshold, controlling the wiper motor to wipe the front windshield at a first frequency for a first duration;

[0087] When the weight of the foreign object is less than or equal to a first preset threshold, controlling the wiper motor to wipe the front windshield at a second frequency for a second duration, wherein the first frequency is higher than the second frequency, includes:

[0088] When the weight of the foreign object is less than or equal to a first preset threshold and the foreign object coverage is less than or equal to a second preset threshold, the wiper motor is controlled to wipe the front windshield at a second frequency within a second time period, and the first frequency is higher than the second frequency.

[0089] In other words, in this implementation, the vehicle self-cleaning method further incorporates image recognition technology. A camera integrated into the wiper base can be used to precisely capture images of the windshield's water channel and glass surface to be inspected, comprehensively covering areas where foreign objects may be present. An image recognition algorithm can then analyze these captured images to identify the distribution of foreign objects and calculate their coverage within the target area—that is, the ratio of the area occupied by the foreign object to the total area.

[0090] Based on this dual detection mechanism, the wiper motor control strategy is further refined: if the weight of the foreign object detected by the piezoelectric sensor exceeds a first preset threshold, or if the foreign object coverage determined by image recognition exceeds a second preset threshold, the system determines that the current level of contamination is high and controls the wiper motor to wipe the windshield at a first frequency for a first duration. Because the first frequency is higher than the second frequency and the first duration is longer, this high-frequency, continuous wiping pattern is more effective in removing large accumulations or large-area distributions of foreign objects, ensuring effective cleaning.

[0091] Conversely, only when the weight of the foreign object is less than or equal to the first preset threshold and the foreign object coverage is less than or equal to the second preset threshold will the system determine that the contamination is light and control the wiper motor to wipe at the second frequency for the second duration. This low-frequency, short-duration operation can complete basic cleaning while avoiding excessive energy consumption and unnecessary wear on the wipers.

[0092] By combining weight detection with image coverage detection, the limitations of a single detection method are overcome. For example, when the weight does not exceed the standard but the foreign matter is distributed over a wide area, or when the coverage does not exceed the standard but there are heavier foreign matter, the system can trigger a more appropriate cleaning mode through dual judgment, thereby making the self-cleaning process more in line with the actual contamination situation and improving the accuracy and reliability of cleaning.

[0093] In one implementation, when the weight of the foreign object is greater than a first preset threshold, the method further includes:

[0094] Controlling the water pump to spray a preset volume of windshield washer fluid; and / or,

[0095] Control the diverter valve to close the air outlet on the inside of the front windshield.

[0096] That is, in this implementation, when the system detects through the piezoelectric sensor that the weight of foreign matter in the windshield water channel is greater than a first preset threshold, it indicates that the accumulation of foreign matter is serious and more intensive cleaning measures are required. To improve the cleaning effect and optimize resource utilization, the system will simultaneously trigger two coordinated operations:

[0097] First, the system controls the water pump to spray a preset volume of windshield washer fluid. This spray effectively softens and dissolves stubborn stains adhering to the glass surface, such as sticky leaf residue and oil. Combined with the high-frequency sweeping of the wipers, windshield washer fluid significantly enhances cleaning efficiency, ensuring that heavier foreign matter is thoroughly removed. The preset volume is based on experimental optimization of common heavy-duty scenarios, ensuring effective cleaning while minimizing water waste.

[0098] Secondly, the system will control the diverter valve to close the air outlet on the inside of the front windshield, and direct all the airflow generated by the blower to the air outlet on the outside of the front windshield, thereby increasing the flushing force on foreign objects in the water guide groove. In conventional defogger mode, the inner air outlet is used to deliver warm air to the surface of the glass inside the vehicle to eliminate fog; in heavy pollution cleaning scenarios, closing the inner air outlet can avoid airflow dispersion, so that more air volume is concentrated on the water guide groove area, and high-speed airflow is used to more effectively blow away heavier foreign objects, such as large fallen leaves or plastic fragments. This design, which optimizes airflow distribution, cleverly extends the function of the blower originally used for defogger to the exterior cleaning scenario, avoiding the need for additional motors, reducing energy consumption and costs, and improving cleaning efficiency.

[0099] In this way, through the synergistic effect of windshield washer fluid injection and airflow distribution, this implementation method forms a complete set of enhanced cleaning solutions for heavy pollution scenarios, which can not only effectively remove stubborn stains, but also make full use of the vehicle's existing resources.

[0100] In step S140, after controlling the blower motor to eject airflow through the air outlet provided on the outside of the front windshield, the method further includes:

[0101] Record the number of times the airflow is injected, and determine whether the number reaches a threshold;

[0102] If the number of times does not reach the threshold number of times, return to the step of collecting deformation data of the piezoelectric sensor;

[0103] When the number of times reaches the threshold, the current deformation data of the piezoelectric sensor is collected, and the foreign matter removal rate is determined based on the current deformation data. When the foreign matter removal rate is less than the cleaning threshold, a prompt message is sent to the user.

[0104] First, the system counts the number of air jets and compares it to a preset threshold. This threshold, based on experimental data for common foreign matter types and accumulation levels, represents the maximum number of attempts required to achieve effective cleaning under normal circumstances. After each air jet, the system automatically accumulates the count, serving as a baseline indicator for evaluating the effectiveness of the cleaning process.

[0105] If the number of attempts has not yet reached the threshold, the current cleaning attempt is still within a reasonable range, but further confirmation may be needed to determine whether the foreign object has been completely removed. At this point, the system returns to the step of collecting piezoelectric sensor deformation data to re-acquire real-time status information within the water channel. By continuously monitoring changes in sensor deformation data, the system can dynamically determine whether foreign objects are still present and whether the weight of the remaining foreign objects has changed, thereby determining whether the air jet needs to be activated again for cleaning.

[0106] When the number of injections reaches the threshold, the system will collect the current deformation data of the piezoelectric sensor and calculate the foreign matter removal rate based on this. For example, the difference in deformation data before and after cleaning can be compared and converted into the reduction ratio of foreign matter weight. For example, if the weight of foreign matter before cleaning is W1 and the residual weight after cleaning is W2, then the removal rate = (W1-W2) / W1×100%. The system will compare this removal rate with the preset cleaning threshold (such as 95%) to evaluate whether the cleaning effect meets the standard.

[0107] If the calculated clearance rate is lower than the cleaning threshold, it means that despite the preset number of airflow injections, a large amount of foreign matter remains in the water channel, which may pose a potential threat to driving safety. In this case, the system will proactively send a prompt message to the user, such as a push notification on the vehicle display or mobile phone app, saying "There is foreign matter remaining in the front windshield water channel, please manually clean it," prompting the driver to take further action.

[0108] In this way, it avoids the potential safety hazards caused by incomplete cleaning in a single time, prevents the waste of energy caused by excessive spraying, and ensures driving safety in extreme situations through the final manual intervention prompt.

[0109] like Figure 2 FIG. 1 is a flow chart of a method for self-cleaning a car in a specific embodiment, which includes the following steps:

[0110] The vehicle starts and powers on, and begins self-cleaning. The camera captures the images to be detected of the front windshield surface and the water guide groove. At the same time, the piezoelectric sensor feeds back deformation data. Then, it can be determined whether there are foreign objects on the front windshield surface and the water guide groove based on the images to be detected and the deformation data. The number of detections is recorded each time a judgment is made.

[0111] If foreign objects are detected on the surface of the front windshield and the water guide groove, it is necessary to further determine the number of detections. The number of detections can be determined based on the number of airflow jets from the air outlet on the outside of the front windshield, or based on the number of times the wiper motor is started, or based on the number of times foreign objects are detected on the surface of the front windshield and the water guide groove. There is no specific limitation.

[0112] If the number of detections is greater than or equal to 3 (number threshold) and foreign objects are still detected, an alarm will be issued to prompt the driver to perform manual cleaning. If the number of detections is less than 3, the vehicle will be self-cleaned according to the following process:

[0113] If there is foreign matter in the water guide groove of the front windshield, turn on the blower motor to blow away the foreign matter through the air outlet on the outside of the front windshield, and turn on the wiper motor for 1 second and wipe once to clear the foreign matter; if there is no foreign matter in the water guide groove of the front windshield, or after completing the steps of cleaning the foreign matter in the water guide groove of the front windshield, you can then judge the foreign matter situation on the surface of the front windshield. If it is lightly contaminated, turn on the wiper motor for 1 second and wipe once to clear the foreign matter. If it is heavily contaminated, turn on the wiper motor for 3 seconds, wipe continuously for 3 times at a high frequency and spray glass water; if there is no foreign matter on the surface of the front windshield, or after completing the steps of cleaning the foreign matter on the surface of the front windshield, the first round of detection is completed, and the process returns to the step of obtaining the image to be detected of the front windshield surface and the water guide groove through the camera, and enters the next round of self-cleaning.

[0114] If no foreign objects are detected on the surface of the front windshield and the water guide groove, or if an alarm has been issued to prompt the driver to clean it manually, the power-on foreign object self-check process can be ended. After the self-check is completed, the air outlet of the front windshield water guide groove can also be used separately and manually opened by pressing a button on the car computer page.

[0115] Example 2

[0116] For ease of understanding, the automobile self-cleaning system provided by this application is described below through several specific embodiments, including:

[0117] The piezoelectric sensor built into the windshield water channel is used to collect deformation data;

[0118] A three-way diverter valve is installed in the air outlet pipe of the front windshield, the inlet of the three-way diverter valve is connected to the blower motor, and the first outlet is connected to the air outlet located outside the front windshield.

[0119] The piezoelectric sensor built into the windshield water channel fills the blind spots of traditional visual inspection. Designed to adapt to the water channel structure, it can fit tightly against the inner wall of the water channel and directly sense the physical changes caused by foreign objects falling into it. When foreign objects such as fallen leaves and plastic bags enter the water channel, the weight of the foreign objects will exert pressure on the sensor, causing tiny deformations. The sensor can then convert this physical deformation into a quantifiable electrical signal (i.e., deformation data). By continuously collecting and analyzing this data, the system can accurately determine whether there are foreign objects in the water channel, and even calculate the weight of the foreign objects based on a calibration model, providing an accurate trigger basis for subsequent automated cleaning, thus avoiding safety hazards caused by undetected foreign objects at the source.

[0120] A three-way diverter valve installed in the windshield air outlet duct achieves efficient functional reuse. The diverter valve's inlet is connected to the blower motor, receiving air from the motor, while the first outlet is specifically connected to the air outlet on the outside of the windshield, forming an airflow channel for the water guide groove.

[0121] In one implementation, the three-way diverter valve further includes a second outlet, which is connected to an air outlet located on the inner side of the front windshield.

[0122] Specifically, the inlet of the three-way diverter valve is always connected to the blower motor, serving as the main airflow input. The first outlet is connected to the air outlet on the outside of the front windshield, responsible for delivering clean air to the sump area. The second outlet is connected to the inner outlet, which performs the defogger function of the front windshield inside the vehicle. When the vehicle is in normal driving mode and the inner fog of the glass needs to be eliminated, the diverter valve closes the first outlet and opens the second outlet. The airflow generated by the blower motor is blown into the inner glass through the inner outlet. By adjusting the air temperature and flow rate, the defogging effect is achieved, ensuring a clear driving view.

[0123] When the system detects foreign matter in the gutter and requires cleaning mode, the diverter valve rapidly switches: closing the second outlet and opening the first outlet. This directs the airflow from the blower motor to the outer outlet, creating a directional airflow that flushes foreign matter such as fallen leaves and debris from the gutter, using the impact of the airflow to remove them. This responsive switching process seamlessly transitions between the two functions, ensuring the original performance of the defogger function while providing a stable airflow source for cleaning the gutter.

[0124] Through the design of the second outlet, the three-way diverter valve successfully expands the original single defogger airflow system into a composite system with both defogger and cleaning functions. It not only simplifies the vehicle structure and reduces the cost of additional equipment, but also improves the practicality of the system through the efficient distribution of airflow, allowing the same set of blowing equipment to play a key role in different scenarios.

[0125] In one implementation, a one-way guide plate and a waterproof cover are installed at the air outlet on the outside of the front windshield.

[0126] The core function of the one-way guide vane is to direct airflow, ensuring precise impact on the windshield gutter. Through a specific angled design, it constrains the airflow from the blower motor into a targeted jet, directly flushing foreign matter from the gutter—whether it's fallen leaves, dust, or small debris—effectively removed by the concentrated airflow. Furthermore, its "one-way" nature prevents backflow or dispersion, preventing airflow disturbances that could reduce cleaning effectiveness. This ensures that every bit of wind is precisely directed to the target area, enhancing the targeted and efficient cleaning process.

[0127] The waterproof cover's design focuses on device protection, addressing environmental adaptability issues for outdoor vehicle use. Because the air outlet is located outside the front windshield and is exposed to rain, snow, dust, and other complex environments, the waterproof cover effectively blocks rain, snow, and road mud from entering the outlet and the connected piping system, preventing moisture from causing rust on components, short circuits, and other faults. Furthermore, the waterproof cover typically features a breathable, watertight structure, blocking liquids without affecting the normal flow of air, ensuring stable cleaning performance in all weather conditions.

[0128] As can be seen from the above, a long flexible piezoelectric film sensor built into the front windshield water guide groove is used to detect foreign objects. At the same time, by modifying the blower airflow distribution system, the defogger function is extended to the off-vehicle maintenance scene. It is both practical and innovative, without the need for a new motor, reducing energy consumption and modification costs.

[0129] like Figure 3 FIG. 1 is a diagram showing the system architecture of this embodiment, which includes a sensor module, a main control unit, and an actuator, wherein:

[0130] The sensor module includes a piezoelectric sensor (sensitivity 0.1g to 50g) using a long, flexible piezoelectric film strip embedded in the windshield's water channel to collect deformation data. A 120° wide-angle camera (1080p resolution, supporting HDR imaging) is integrated into the wiper base to capture images of the windshield surface under inspection. After the sensor module collects data, it transmits it to the ECU (Electronic Control Unit) in the main control unit via the CAN / LIN bus.

[0131] The ECU makes dynamic cleaning decisions based on deformation data and the image to be detected, and then controls the actuators via PWM (Pulse Width Modulation).

[0132] The actuators include:

[0133] The blower motor (pressure 0.5MPa) is used to spray air to blow away foreign matter in the windshield water guide groove; specifically, a three-way diverter valve can be installed in the path from the existing blower outlet to the windshield air outlet pipe to guide the air to the windshield water guide groove outside the vehicle through the newly added pipe; the newly added air outlet can be placed in a hidden position below the wipers on both sides of the windshield (designed with a one-way guide plate + waterproof cover, only allowing air to blow outward), directly aimed at the windshield water guide groove, and use high-speed airflow to flush foreign matter such as fallen leaves; when the heavy pollution cleaning mode is turned on according to the foreign matter detection result before the vehicle starts driving, the diverter valve device opens the outgoing air outlet (front windshield water guide groove outlet) and closes the inner air outlet (front windshield defogger outlet); in the front windshield defogger mode, the diverter valve closes the outgoing air outlet (front windshield water guide groove outlet) and opens the inner air outlet (front windshield defogger outlet) to avoid air volume diversion affecting the defogger effect;

[0134] The wiper motor can be integrated with a PWM speed control unit, supporting a 0.1-second response;

[0135] The water spray motor sprays glass water to remove stubborn stains on the front windshield. It is controlled by a water pump and can spray 200mL at a time.

[0136] Example 3

[0137] The present application also provides a car self-cleaning device 20, please refer to Figure 4 ,include:

[0138] The acquisition module 201 is used to acquire deformation data of a piezoelectric sensor installed in the water channel of the front windshield;

[0139] A judgment module 202 is configured to judge whether there is a foreign object in the water channel of the front windshield based on the deformation data;

[0140] The cleaning module 203 is used to control the blower motor to spray air through the air outlet arranged on the outside of the front windshield when there is foreign matter in the water guide groove of the front windshield, and the airflow is used to flush the foreign matter in the water guide groove of the front windshield.

[0141] The present application also provides an electronic device 90, please refer to Figure 5 , including a processor 910 and a memory 920, wherein the memory 910 is used to store computer programs; the processor 920 is used to execute the programs stored in the memory 910 to implement the automobile self-cleaning method introduced in any embodiment of the present application.

[0142] An embodiment of the present application further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the automobile self-cleaning method introduced in any embodiment of the present application is implemented.

[0143] In this application, a plurality refers to two or more.

[0144] In this application, unless otherwise expressly defined, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. A person of ordinary skill in the art will understand the specific meanings of these terms in this application.

[0145] The terms "first," "second," "third," "fourth," etc. (if any) in this application are used to distinguish similar objects and are not necessarily used to describe a particular sequential order.

[0146] In this application, the term "and / or" simply describes the relationship between related objects, indicating that three relationships can exist. For example, "car self-cleaning and / or B" can represent three situations: car self-cleaning exists alone, car self-cleaning and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0147] Unless otherwise specified, all steps of the present application may be performed sequentially or randomly. For example, the method includes steps A and B, which means that the method may include steps B and C performed sequentially, or may include steps B and B performed sequentially. For example, the method may further include step C, which means that step C may be added to the method in any order. For example, the method may include steps B, C, and C, or may include steps C, B, or C, etc.

[0148] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A method for self-cleaning a car, characterized in that: include: Collecting deformation data of a piezoelectric sensor installed in the water channel of the front windshield; determining whether there is a foreign object in the water channel of the front windshield based on the deformation data; When there is foreign matter in the water guide channel of the front windshield, the blower motor is controlled to spray airflow through an air outlet arranged on the outside of the front windshield, and the airflow is used to flush the foreign matter in the water guide channel of the front windshield.

2. The method according to claim 1, characterized in that The piezoelectric sensor is a flexible piezoelectric film sensor.

3. The method according to claim 1 or 2, characterized in that In the case that there is foreign matter in the water channel of the front windshield, the method further includes: determining a weight of the foreign object in the water channel of the front windshield based on the deformation data; When the weight of the foreign object is greater than a first preset threshold, controlling the wiper motor to wipe the front windshield at a first frequency within a first duration; When the weight of the foreign object is less than or equal to the first preset threshold, the wiper motor is controlled to wipe the front windshield at a second frequency within a second time period, the first frequency is higher than the second frequency, and the first time period is greater than the second time period.

4. The method according to claim 3, characterized in that The method further comprises: Collecting an image to be detected within a target area, wherein the target area includes the interior of the windshield water channel and the windshield; Performing target recognition on the image to be detected to determine the coverage rate of foreign matter in the image to be detected; When the weight of the foreign object is greater than a first preset threshold, controlling the wiper motor to wipe the front windshield at a first frequency within a first time period includes: When the weight of the foreign object is greater than a first preset threshold and / or the coverage rate of the foreign object is greater than a second preset threshold, controlling the wiper motor to wipe the front windshield at a first frequency for a first duration; When the weight of the foreign object is less than or equal to the first preset threshold, controlling the wiper motor to wipe the front windshield at a second frequency for a second duration, wherein the first frequency is higher than the second frequency, includes: When the weight of the foreign object is less than or equal to the first preset threshold and the foreign object coverage is less than or equal to the second preset threshold, the wiper motor is controlled to wipe the front windshield at a second frequency within a second time period, and the first frequency is higher than the second frequency.

5. The method according to claim 3, characterized in that When the weight of the foreign object is greater than a first preset threshold, the method further includes: Controlling the water pump to spray a preset volume of windshield washer fluid; and / or, The diverter valve is controlled to close the air outlet on the inner side of the front windshield.

6. The method according to claim 1, characterized in that After the blower motor is controlled to eject airflow through the air outlet provided on the outside of the front windshield, the method includes: Recording the number of times the airflow is injected, and determining whether the number reaches a threshold value; If the number of times does not reach the number threshold, returning to the step of collecting deformation data of the piezoelectric sensor; When the number reaches the number threshold, the current deformation data of the piezoelectric sensor is collected, and the foreign matter removal rate is determined based on the current deformation data. When the foreign matter removal rate is less than the cleaning threshold, a prompt message is sent to the user.

7. A car self-cleaning device, characterized in that: include: An acquisition module, used to acquire deformation data of a piezoelectric sensor installed in the water channel of the front windshield; a judgment module, configured to judge whether there is a foreign object in the water channel of the front windshield based on the deformation data; The cleaning module is used to control the blower motor to spray air through the air outlet arranged on the outside of the front windshield when there is foreign matter in the water guide groove of the front windshield. The airflow is used to flush the foreign matter in the water guide groove of the front windshield.

8. A car self-cleaning system, characterized in that: include: The piezoelectric sensor built into the windshield water channel is used to collect deformation data; A three-way diverter valve is installed in the air outlet pipe of the front windshield, wherein the inlet of the three-way diverter valve is connected to the blower motor, and the first outlet is connected to the air outlet located outside the front windshield.

9. The system according to claim 8, characterized in that The three-way diverter valve further includes a second outlet connected to an air outlet located on the inner side of the front windshield.

10. The system according to claim 8, wherein: A one-way guide plate and a waterproof cover are installed at the air outlet outside the front windshield.

11. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

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