Windscreen wiper control method and vehicle

Abstract

The embodiment of the invention relates to the technical field of vehicles, and discloses a windscreen wiper control method and a vehicle. The method comprises the steps that pressure size information and pressure distribution information are obtained; the pressure size information and the pressure distribution information are determined based on a current pressure signal detected by a film pressure sensor arranged in a windscreen wiper rubber strip or attached to a windscreen wiper movement starting area; and executing a preset operation according to the pressure size information and the pressure distribution information. By means of the technical scheme, it can be guaranteed that the windscreen wiper rubber strip meets the active monitoring requirement of the vehicle in the complex driving environment.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, specifically to a windshield wiper control method and a vehicle. Background Technology

[0002] During actual vehicle operation, the wiper blades will gradually age or deform due to long-term use, environmental wear (such as corrosion from windshield washer fluid or friction from gravel), and temperature changes (such as extreme high or low temperatures), resulting in unbalanced pressure distribution or insufficient pressure.

[0003] Existing technologies generally lack the ability to actively monitor the dynamic working status of the rubber strips in windshield wipers, resulting in significant delays and safety hazards. Summary of the Invention

[0004] In view of the above problems, embodiments of the present invention provide a windshield wiper control method and a vehicle to solve the technical problem that existing windshield wipers cannot adapt to the active monitoring needs of vehicles in complex driving environments.

[0005] According to one aspect of the present invention, a method for controlling a windshield wiper is provided, the method comprising:

[0006] Acquire pressure magnitude information and pressure distribution information; the pressure magnitude information and pressure distribution information are determined based on the current pressure signal detected by a thin-film pressure sensor located in the wiper blade or attached to the windshield at the starting area of ​​wiper movement;

[0007] Based on the pressure magnitude information and the pressure distribution information, a preset operation is performed.

[0008] According to another aspect of the present invention, a windshield wiper control device is provided, comprising:

[0009] The acquisition module is used to acquire pressure magnitude information and pressure distribution information; the pressure magnitude information and pressure distribution information are determined based on the current pressure signal detected by a thin-film pressure sensor located in the wiper blade or attached to the windshield at the starting area of ​​the wiper movement;

[0010] The processing module is used to perform preset operations based on the pressure magnitude information and the pressure distribution information.

[0011] According to another aspect of the present invention, a vehicle is provided, comprising: a processor, a memory, a communication interface, and a communication bus, wherein the processor, the memory, and the communication interface communicate with each other via the communication bus;

[0012] The memory is used to store at least one executable instruction that causes the processor to perform operations such as the windshield wiper control method described above.

[0013] According to another aspect of the present invention, a computer-readable storage medium is provided:

[0014] The storage medium stores at least one executable instruction that causes the wiper control device / vehicle to perform the operation of the wiper control method described above.

[0015] According to another aspect of the present invention, a computer program product is provided, including a computer program that, when executed by a processor, causes a windshield wiper control device / vehicle to perform the operation of the above-described method.

[0016] This invention acquires pressure magnitude and pressure distribution information. These information is determined based on the current pressure signal detected by a thin-film pressure sensor located in the wiper blade or attached to the windshield at the start of wiper movement. Preset operations are then executed based on this pressure magnitude and distribution information. This solution uses a thin-film pressure sensor located in the wiper blade or attached to the windshield at the start of wiper movement to detect the current pressure signal when the wiper contacts the glass in real time, thereby acquiring accurate pressure magnitude and distribution information. It can dynamically determine the wiper's contact with the glass, the degree of wear on the blade, or changes in the cleanliness of the glass surface, and automatically adjust wiper operating parameters (e.g., wiping speed, pressure compensation) or issue maintenance reminders, thereby effectively improving wiping performance, preventing wiper blade noise or vibration, extending wiper lifespan, and enhancing driving safety and experience.

[0017] The above description is merely an overview of the technical solutions of the embodiments of the present invention. In order to better understand the technical means of the embodiments of the present invention and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0018] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0019] Figure 1 A flowchart of a first embodiment of the windshield wiper control method provided by the present invention is shown;

[0020] Figure 2 A schematic diagram of the structure of the vehicle-mounted thin-film pressure sensor provided by the present invention is shown;

[0021] Figure 3 This diagram illustrates the installation of the vehicle-mounted thin-film pressure sensor embedded in a windshield wiper, as provided by the present invention.

[0022] Figure 4 A schematic diagram of the installation of the vehicle-mounted thin-film pressure sensor provided by the present invention embedded in the windshield is shown.

[0023] Figure 5 A flowchart of a second embodiment of the windshield wiper control method provided by the present invention is shown;

[0024] Figure 6 A flowchart of the windshield wiper control system provided by the present invention is shown;

[0025] Figure 7 A schematic diagram of an embodiment of the windshield wiper control device provided by the present invention is shown;

[0026] Figure 8 A structural schematic diagram of an embodiment of the vehicle provided by the present invention is shown. Detailed Implementation

[0027] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0028] Real-time monitoring technology for the pressure state between the wiper blade and the windshield in an automotive wiper system is mainly used for driving safety scenarios in rainy or inclement weather conditions.

[0029] As a key component ensuring clear visibility for the driver, the wiping effect of windshield wipers directly depends on the uniformity and magnitude of pressure distribution between the wiper blade and the glass. During actual vehicle operation, the wiper blade gradually ages or deforms due to factors such as long-term use, environmental wear (e.g., corrosion from windshield washer fluid, friction from grit), and temperature changes (e.g., extreme high or low temperatures), leading to uneven pressure distribution or insufficient pressure. This performance degradation can cause problems such as incomplete wiping, abnormal noise, and vibration; in severe cases, it can even lead to traffic accidents due to impaired visibility.

[0030] Current technologies for windshield wiper blade pressure testing primarily rely on offline, static testing methods developed during the research and development phase. For example, this involves measuring the static pressure distribution of the wiper blade using mechanical loading devices or optical measurement equipment in a laboratory environment. Currently, windshield wiper blade pressure testing faces the following main problems:

[0031] 1. Lack of real-time monitoring: The vehicle itself lacks the ability to monitor the working status of the wiper blades in real time. Drivers can only passively judge that the blades are worn by the wiping effect (e.g., incomplete wiping, abnormal noise, vibration), which poses a safety hazard;

[0032] 2. Outdated testing methods: Existing stress testing is limited to offline and static testing during the R&D stage and cannot be applied to real-time monitoring of mass-produced vehicles in complex driving environments;

[0033] 3. Lack of early warning and adaptation: It cannot provide early warnings when the rubber strip is in the early stages of wear or when the pressure is abnormal, and it cannot adjust the working parameters of the wiper system in real time based on pressure data to maintain optimal performance.

[0034] Based on the aforementioned technical problems, the technical concept of this invention is as follows: A flexible thin-film pressure sensor array can be integrated into the wiper blade or the wiper initiation area of ​​the windshield to directly acquire the most critical physical quantity during wiper operation, namely, contact pressure. This allows for precise capture of the current pressure signal reflecting the wiper's operating status. By analyzing these signals, not only the macroscopic pressure magnitude can be obtained, but also a microscopic pressure distribution map. Based on this, preset operations can be performed, such as automatically adjusting the wiper arm angle to prevent bounce when pressure is uneven, increasing pressure to ensure clear wiping when pressure is insufficient, or issuing a replacement warning to the driver when abnormal pressure distribution caused by blade wear is detected. This enables proactive wiper adjustment warnings, etc.

[0035] Based on the above technical concept, the technical solution of the present invention will be described in detail through specific embodiments. The executing subject of the present invention is a vehicle, specifically a control device distributed at the sensing end or the vehicle's main controller end. It should be noted that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0036] Figure 1 A flowchart of a first embodiment of the windshield wiper control method provided by the present invention is shown, the method being executed by a vehicle. Figure 1 As shown, the method includes the following steps:

[0037] Step 11: Obtain pressure magnitude information and pressure distribution information;

[0038] The pressure magnitude and pressure distribution information are determined based on the current pressure signal detected by a thin-film pressure sensor located in the wiper blade or attached to the windshield at the starting area of ​​the wiper movement.

[0039] In this step, a precision thin-film pressure sensor is embedded or attached inside the wiper blade or at the starting position of the wiper movement on the windshield; the thin-film pressure sensor detects and outputs the current pressure signal of the wiper blade acting on the glass surface in real time.

[0040] The current pressure signal was then processed and analyzed to extract pressure magnitude information, reflecting the overall positive pressure applied to the glass by the wiper; and pressure distribution information, revealing whether the pressure distribution along the length of the rubber strip was uniform.

[0041] For example, Figure 2 A schematic diagram of the structure of the vehicle-mounted thin-film pressure sensor provided by the present invention is shown, as follows: Figure 2 As shown, the vehicle-mounted thin-film pressure sensor includes: an upper flexible insulating film 21, an upper electrode layer 22, a pressure-sensitive material layer 23, a lower electrode layer 24, a lower flexible insulating film 25, and a flexible cable 26.

[0042] In this implementation, the thin-film pressure sensor adopts a multi-layer composite encapsulation structure, which includes, from top to bottom: a scratch-resistant and wear-resistant layer (e.g., polyurethane (PU)), an electromagnetic shielding layer, a waterproof sealing layer (e.g., a silicone sealing ring or encapsulating adhesive), and a flexible substrate, to ensure its long-term stable operation in harsh environments such as -40℃ to 85℃, humidity, rain, and glass water corrosion.

[0043] For example, Figure 3 This diagram illustrates the installation of the vehicle-mounted thin-film pressure sensor embedded in a windshield wiper, as provided by the present invention. Figure 3 As shown, the installation schematic includes: wiper blade 31, vehicle-mounted diaphragm pressure sensor 32, and wiper blade bracket 33.

[0044] In this implementation, the vehicle-mounted thin-film pressure sensor 32 is co-extruded with the wiper blade 31 in the form of a sandwich layer, or it is embedded as a pad between the back of the blade and the slot of the wiper arm to achieve seamless integration.

[0045] For example, Figure 4 This diagram illustrates the installation of the vehicle-mounted thin-film pressure sensor provided by the present invention embedded in the windshield. Figure 4 As shown, the installation schematic includes: windshield 41, glass black edge 42, wiper blade rest 43, and vehicle-mounted thin film pressure sensor 32.

[0046] In this implementation, the vehicle-mounted thin-film pressure sensor 32 is made into an ultra-thin flexible strip with a weather-resistant adhesive on one side, and is directly attached to the starting area of ​​the wiper movement on the windshield for instantaneous pressure detection at the start of each wipe.

[0047] Alternatively, the thin-film pressure sensor can be replaced by other sensing elements that can sense pressure or deformation, such as piezoelectric films or fiber optic sensors.

[0048] Step 12: Execute the preset operation based on the pressure magnitude and pressure distribution information.

[0049] In this step, the pressure information can be used to determine whether the wiper blade is tightly or loosely attached, and the pressure distribution information can be used to diagnose wiper blade wear, glass surface fit, or the presence of foreign objects interfering with the wiper blade.

[0050] Based on this, corresponding preset operations can be performed for different pressure magnitude and pressure distribution information.

[0051] Accordingly, the pressure magnitude information includes the average pressure magnitude determined based on the current pressure signal; the pressure distribution information includes the pressure distribution variance determined based on the current pressure signal.

[0052] The first setting condition includes: the average pressure is less than the first preset pressure threshold; the second setting condition includes: the pressure distribution variance is greater than the second preset pressure distribution variance.

[0053] In this implementation, pressure magnitude information can be quantified as an average pressure magnitude determined based on the current pressure signal. This involves averaging all pressure values ​​collected by the sensor array, and the average pressure magnitude can efficiently characterize the overall pressure of the wiper blade on the glass. Pressure distribution information can be quantified as the pressure distribution variance determined based on the current pressure signal. Variance is a statistical indicator that measures the degree of data dispersion. Here, it is used to accurately characterize the uniformity of pressure along the length of the wiper blade. That is, the smaller the variance value, the more uniform the pressure distribution and the better the fit. The larger the variance value, the more high the pressure in some areas and the lower the pressure in others, revealing local problems such as wiper blade wear, frame deformation, or foreign objects on the glass.

[0054] Optionally, one implementation of step 12 can be: generating a first prompt message when the pressure magnitude information meets the first set condition or the pressure distribution information meets the second set condition.

[0055] The first prompt message is used to remind the user to check the wiper blades;

[0056] In this implementation, the first setting condition is related to the pressure magnitude. For example, when the detected average pressure magnitude is less than the first preset pressure threshold, it indicates that the adhesive strip may have aged and hardened and cannot effectively press the glass. The second setting condition is related to the pressure distribution. For example, when the detected pressure distribution variance is greater than the second preset pressure distribution variance, it suggests that the adhesive strip may have local wear, twisting, or improper installation.

[0057] If any of these conditions are met, a specific diagnostic message or command, the first warning message, is sent via the vehicle's Controller Area Network (CAN) bus to the vehicle gateway, instrument cluster, or central control screen. The multi-function display on the instrument panel will then illuminate a specific warning icon (e.g., a windshield wiper icon with an exclamation mark) and may be accompanied by text messages such as "Please check the wiper blades" or a warning sound, thus accurately and promptly informing the user that inspection and maintenance are required.

[0058] Optionally, another implementation of step 12 can be: when the pressure information meets the first set condition, control the wiper motor corresponding to the wiper blade to increase the working torque to the first torque, or / and control the extension rod of the push rod in the wiper arm to extend downward by the first displacement.

[0059] In this implementation, when insufficient pressure information is detected (i.e., the first set condition is met, such as the average pressure being less than the first preset pressure threshold), two proactive compensatory preset operations are triggered.

[0060] 1) Control the wiper motor corresponding to the wiper blade to increase the working torque to the first torque. By increasing the driving force of the motor, the resistance of the wiper arm system is indirectly overcome, so that it can press more firmly on the glass.

[0061] 2) Control the extension rod of the push rod in the wiper arm to extend downwards by the first displacement. By actively extending the length of the push rod, the downward pressure of the wiper arm on the rubber strip is directly changed.

[0062] The windshield wiper control method provided in this invention acquires pressure magnitude information and pressure distribution information. This pressure magnitude and distribution information are determined based on the current pressure signal detected by a thin-film pressure sensor located in the wiper blade or attached to the windshield at the start of wiper movement. Preset operations are executed according to the pressure magnitude and distribution information. This solution uses a thin-film pressure sensor located in the wiper blade or attached to the windshield at the start of wiper movement to detect the current pressure signal when the wiper contacts the glass in real time, and obtains accurate pressure magnitude and distribution information accordingly. It can dynamically determine the wiper's contact state with the glass, the degree of wear on the blade, or changes in the cleanliness of the glass surface, thereby automatically adjusting wiper operating parameters (such as wiping speed and pressure compensation) or issuing maintenance reminders. This effectively improves wiping performance, avoids wiper blade noise or vibration, extends wiper life, and enhances driving safety and experience.

[0063] Based on the above embodiments, Figure 5A flowchart of a second embodiment of the windshield wiper control method provided by the present invention is shown, the method being executed by a vehicle. Figure 5 As shown, step 11 may include:

[0064] Step 51: Obtain the current pressure signal and preprocess the current pressure signal to obtain the preprocessed signal.

[0065] In this step, the raw current pressure signal is read in real time from the thin-film pressure sensor array embedded in the wiper blade or the starting area of ​​the windshield. This current pressure signal will inevitably be mixed with various noises in the real physical environment, such as signal fluctuations caused by vehicle vibration, motor electromagnetic interference and changes in ambient temperature.

[0066] Therefore, preprocessing the current pressure signal can include signal amplification, filtering and noise reduction (such as removing high-frequency jitter), and analog-to-digital conversion, to output a cleaner, more stable, and more properly formatted preprocessed signal.

[0067] Optionally, one possible implementation of step 51 is to filter the noise in the current pressure signal based on a first preset frequency to obtain a filtered preprocessed signal.

[0068] In this implementation, during vehicle operation, high-frequency or low-frequency mechanical noise can cause signal jitter. At this time, a low-pass filter can be set to allow only slowly changing real pressure signals with frequencies lower than a first preset frequency, such as 5Hz, to pass through, while filtering out higher-frequency vibration noise to obtain a filtered pre-processed signal.

[0069] It should be noted that, in this embodiment of the invention, filtering noise in the current pressure signal can be done by directly filtering noise from the current pressure signal detected by the thin-film pressure sensor before any prior processing, or by processing the current pressure signal first and then filtering the noise. For example, before filtering the noise in the current pressure signal, at least one type of processing, such as temperature compensation, vehicle speed compensation, or conversion processing, can be performed on the current pressure signal, and then the noise filtering operation can be performed on the pre-processed signal.

[0070] Optionally, one possible implementation of step 51 could be:

[0071] Step 1: Obtain the current temperature information;

[0072] In this implementation, temperature changes directly affect the hardness of the wiper blade (e.g., hardening at low temperatures and softening at high temperatures) as well as the material properties and electrical output of the thin-film pressure sensor itself, thus becoming a disturbance variable in the pressure signal.

[0073] At this time, the current temperature information of the wiper's working environment can be collected in real time by a specific temperature sensor (e.g., the sensor can be integrated into the pressure sensing module or placed near the windshield).

[0074] Step 2: Based on the current temperature information, the current pressure signal is compensated using a preset temperature compensation model to obtain a pre-processed signal after temperature compensation.

[0075] In this implementation, the current temperature information obtained in the previous step is used as input, and the internally established and stored temperature compensation model is called (this temperature compensation model defines the drift characteristics of the pressure sensor output signal and the law of change of the rubber strip material properties at different temperatures). The current pressure signal, which has already undergone preliminary noise reduction and other processing, is corrected by algorithm to eliminate the part of the signal deviation caused by temperature change rather than actual pressure change, and finally the pre-processed signal is output.

[0076] It should be noted that, in this embodiment of the invention, compensating the current pressure signal using a preset temperature compensation model can either directly compensate for the noise in the current pressure signal detected by the thin-film pressure sensor before any prior processing, or it can involve processing the current pressure signal first and then performing temperature compensation. For example, before performing temperature compensation on the current pressure signal, at least one type of processing, such as noise filtering, vehicle speed compensation, or conversion processing, can be applied to the current pressure signal, and then the temperature compensation operation can be performed on the pre-processed signal.

[0077] Optionally, one possible implementation of step 51 could be:

[0078] Step 1: Obtain current vehicle speed information;

[0079] In this implementation, since vehicle speed directly and significantly affects the stress environment of the windshield, that is, the higher the vehicle speed, the greater the aerodynamic pressure acting on the glass and wipers, which will cause the wipers to tend to be lifted off the glass, thereby changing their actual contact pressure.

[0080] At this time, the vehicle's speed data, i.e., the current vehicle speed information, can be read in real time through network interfaces such as the vehicle's CAN bus.

[0081] Step 2: Based on the current vehicle speed information, the current pressure signal is compensated using a preset vehicle speed compensation model to obtain the pre-processed signal after vehicle speed compensation.

[0082] In this implementation, the acquired current vehicle speed information is used as input, and an internally calibrated vehicle speed compensation model (which describes the systematic influence of aerodynamic lift on the wiper pressure signal at different vehicle speeds) is invoked to perform algorithmic reverse compensation on the pre-processed current pressure signal. This removes or cancels out the aerodynamic pressure component caused by vehicle speed from the original signal, and finally outputs the pre-processed signal after vehicle speed compensation.

[0083] In one possible implementation, the calculation formula for the vehicle speed compensation model can be: preprocessed signal - K * vehicle speed², where vehicle speed is the current vehicle speed information, and K is a calibration coefficient obtained by fitting wind tunnel test data (related to air density and windshield wiper frontal area).

[0084] It should be noted that, in this embodiment of the invention, compensating for the current pressure signal using a vehicle speed compensation model can be achieved either by directly compensating for noise in the current pressure signal detected by the thin-film pressure sensor before any prior processing, or by processing the current pressure signal first and then performing vehicle speed compensation. For example, before performing vehicle speed compensation on the current pressure signal, at least one type of processing, such as noise filtering, temperature compensation, or conversion processing, can be applied to the current pressure signal, and then the vehicle speed compensation operation can be performed on the pre-processed signal.

[0085] Optionally, one possible implementation of step 51 is: to perform conversion processing on the current pressure signal according to a preset conversion strategy to obtain a pre-processed signal after conversion;

[0086] The conversion strategy is obtained by fitting at least one pressure signal and at least one calibration pressure information.

[0087] In this implementation, during the development or calibration phase, technicians can collect the sensor's output signal (i.e., at least one pressure signal) under various known operating conditions, and compare and analyze it with at least one calibrated pressure information obtained through high-precision measurement equipment to find the mapping relationship between the original signal and the real pressure, and finally fit an accurate conversion function or conversion model, i.e., conversion strategy.

[0088] In practical applications, this conversion strategy is used to convert and process the real-time acquired current pressure signal to eliminate the inherent nonlinear error and individual differences of the sensor. The voltage or digital reading of the sensor is linearized and standardized to restore the pressure data with clear physical meaning and accurate value, and finally the pre-processed signal is obtained.

[0089] It should be noted that, in this embodiment of the invention, the conversion strategy for the current pressure signal can either directly convert the noise in the current pressure signal detected by the thin-film pressure sensor before any prior processing, or it can involve processing the current pressure signal first and then performing the conversion. For example, before performing vehicle speed compensation on the current pressure signal, at least one type of processing—noise filtering, temperature compensation, or vehicle speed compensation—can be applied, and then the converted signal can be performed.

[0090] It should be noted that, in this embodiment of the invention, the preprocessing of the current pressure signal may include at least one type of preprocessing among noise filtering, temperature compensation, vehicle speed compensation, and conversion processing. When performing multiple types of preprocessing on the current pressure signal, the various types of preprocessing can be performed in a preset order, and the signal output after the first processing is used as the input signal for the subsequent processing, thereby achieving the preprocessing of the current pressure signal. In one embodiment, noise filtering can be performed on the current pressure signal first to obtain a filtered preprocessed signal, then temperature compensation can be performed on the filtered preprocessed signal to obtain a temperature-compensated preprocessed signal, then vehicle speed compensation can be performed on the temperature-compensated preprocessed signal to obtain a speed-compensated preprocessed signal, then conversion processing can be performed on the speed-compensated preprocessed signal to obtain a converted preprocessed signal, and finally, pressure magnitude information and pressure distribution information are obtained based on the converted preprocessed signal.

[0091] Step 52: Obtain pressure magnitude information and pressure distribution information based on the preprocessed signal.

[0092] In this step, the received preprocessed signal is essentially a sensor array data stream containing spatial and intensity information.

[0093] Furthermore, in order to obtain information about the pressure level, the preprocessed signal may be fused and statistically processed (e.g., the average value of all sensor readings may be calculated) to obtain a single value that represents the overall positive pressure level of the wipers acting on the glass surface.

[0094] Furthermore, in order to obtain pressure distribution information, the spatial characteristics of the preprocessed signal can be analyzed (e.g., the dispersion and variance of each sensor unit reading relative to the average value) to accurately characterize the uniformity of pressure along the length of the wiper blade.

[0095] The windshield wiper control method provided in this invention obtains a preprocessed signal by acquiring the current pressure signal and then preprocessing it. Based on the preprocessed signal, pressure magnitude and pressure distribution information are obtained. This method effectively filters out noise introduced by environmental electromagnetic interference and vehicle vibration by preprocessing the current pressure signal detected by a thin-film pressure sensor, significantly improving the purity and reliability of the signal. Furthermore, the accuracy and stability of the pressure magnitude and pressure distribution information derived from the preprocessed signal are fundamentally guaranteed, improving the accuracy of subsequent vehicle control of the windshield wipers.

[0096] Based on the above embodiments, Figure 6 A flowchart of the windshield wiper control system provided by the present invention is shown, as follows: Figure 6 As shown, the system may include: a sensing module, a signal processing module, a control and execution model, and external systems and actuators.

[0097] Based on the above modules, an example of a possible implementation of an embodiment of the present invention is provided:

[0098] In the sensing module: a thin-film pressure sensor (integrated into the windshield wiper stop or wiper blade);

[0099] In the signal processing module: after acquiring the analog signal from the sensing module, the digital pressure signal is obtained through the signal conditioning circuit (amplification or filtering), A / D converter (ADC), and microprocessor MCU (running compensation algorithm);

[0100] In the control and execution model: the main controller MCU executes diagnostic logic (pressure analysis / threshold judgment); determines the activation of the wiper control unit and the warning execution unit, which correspond to the wiper motor and the vehicle's instrument panel or central control screen, respectively; in addition, it interacts with the vehicle's CAN bus to exchange data such as vehicle status (temperature, vehicle speed) (in this implementation, temperature compensation and dynamic compensation corresponding to vehicle speed, as well as system compensation, i.e., calculating the actual pressure using factory calibration parameters).

[0101] The system and actuators include: wiper control unit, warning actuator unit, and vehicle CAN bus.

[0102] In another possible implementation of this solution, in scenarios where precise pressure values ​​are not required, the condition of the rubber strip can be roughly determined indirectly by monitoring the current of the aforementioned wiper motor.

[0103] For example, by monitoring the operating current of the wiper motor in real time and comparing it with the reference current curve established at different vehicle speeds under the condition of new rubber strips and clean glass, the condition of the rubber strips can be indirectly judged. When the rubber strips are aged and hardened or there are stubborn stains on the glass, the wiping resistance will increase significantly, resulting in an increase in motor load and reflected as a continuous abnormal exceedance of the operating current. If the current value is detected to be continuously higher than the preset threshold under specific operating conditions, it can be inferred that the wiping is obstructed and a third prompt message to check the wipers can be generated.

[0104] The windshield wiper control method and system described in the above embodiments have the following technical advantages compared with the prior art:

[0105] 1. Real-time online monitoring of vehicles has been achieved: Laboratory technology has been successfully applied to the mass production vehicle environment, solving the user pain point of when to replace wiper blades.

[0106] 2. Improved active safety: Provides early warnings before wiper performance significantly deteriorates, preventing safety accidents caused by poor visibility.

[0107] 3. Intelligent and Adaptive: The optional adaptive adjustment function improves the wiping effect and user experience, while maintaining optimal pressure to avoid rapid wear of the rubber strip and motor load caused by excessive pressure.

[0108] 4. High reliability: Special packaging and compensation algorithms designed for the automotive environment ensure long-term system stability and data accuracy. Adjustments should be made to optimize the wiping effect and extend the system's lifespan.

[0109] Figure 7 A schematic diagram of an embodiment of the windshield wiper control device provided by the present invention is shown. Figure 7 As shown, the device includes:

[0110] The acquisition module 71 is used to acquire pressure magnitude information and pressure distribution information; the pressure magnitude information and pressure distribution information are determined based on the current pressure signal detected by a thin-film pressure sensor located in the wiper blade or attached to the windshield at the starting area of ​​the wiper movement;

[0111] The processing module 72 is used to perform preset operations based on the pressure magnitude information and pressure distribution information.

[0112] In one or more embodiments, the processing module 72 performs a preset operation based on the pressure magnitude information and pressure distribution information, specifically for:

[0113] When the pressure information meets the first set condition or the pressure distribution information meets the second set condition, a first prompt message is generated to remind the user to check the wiper blades.

[0114] In one or more embodiments, the processing module 72 performs a preset operation based on the pressure magnitude information and pressure distribution information, specifically for:

[0115] When the pressure information meets the first set condition, control the wiper motor corresponding to the wiper blade to increase the working torque to the first torque, and / or control the extension rod of the push rod in the wiper arm to extend downward by the first displacement.

[0116] In one or more embodiments, the pressure magnitude information includes an average pressure magnitude determined based on the current pressure signal; the pressure distribution information includes a pressure distribution variance determined based on the current pressure signal.

[0117] The first set condition includes: the average pressure is less than the first preset pressure threshold.

[0118] The second set condition includes: the pressure distribution variance is greater than the second preset pressure distribution variance.

[0119] In one or more embodiments, the acquisition module 71 acquires pressure magnitude information and pressure distribution information, specifically for:

[0120] Acquire the current pressure signal and preprocess it to obtain a preprocessed signal;

[0121] Pressure magnitude and pressure distribution information are obtained based on the preprocessed signal.

[0122] In one or more embodiments, the acquisition module 71 acquires the current pressure signal and preprocesses the current pressure signal to obtain a preprocessed signal, specifically for:

[0123] Based on a first preset frequency, noise in the current pressure signal is filtered to obtain a filtered preprocessed signal.

[0124] In one or more embodiments, the acquisition module 71 acquires the current pressure signal and preprocesses the current pressure signal to obtain a preprocessed signal, specifically for:

[0125] Get the current temperature information;

[0126] Based on the current temperature information, the current pressure signal is compensated using a preset temperature compensation model to obtain the preprocessed signal.

[0127] In one or more embodiments, the acquisition module 71 acquires the current pressure signal and preprocesses the current pressure signal to obtain a preprocessed signal, specifically for:

[0128] Get current vehicle speed information;

[0129] Based on the current vehicle speed information, the current pressure signal is compensated using a preset vehicle speed compensation model to obtain a compensated preprocessed signal.

[0130] In one or more embodiments, the acquisition module 71 acquires the current pressure signal and preprocesses the current pressure signal to obtain a preprocessed signal, specifically for:

[0131] According to the preset conversion strategy, the current pressure signal is converted and processed to obtain the converted preprocessed signal; the conversion strategy is obtained by fitting at least one pressure signal and at least one calibration pressure information.

[0132] It should be noted that the division of the various modules in the above device is merely a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical element, or they can be physically separated. Furthermore, these modules can be implemented entirely in software through processing element calls, or entirely in hardware. Alternatively, some modules can be implemented through processing element calls in software, while others can be implemented in hardware. Moreover, these modules can be integrated together or implemented independently. The processing element here can be an integrated circuit with signal processing capabilities. During implementation, each step of the above method or each of the above modules can be completed through the integrated logic circuits in the hardware of the processor element or through software instructions.

[0133] As can be seen from the above, the wiper control device provided in this embodiment of the invention can detect the current pressure signal when the wiper contacts the glass in real time through a thin-film pressure sensor installed in the wiper blade or attached to the wiper movement starting area on the windshield, and obtain accurate pressure magnitude and pressure distribution information accordingly; it can dynamically determine the contact state between the wiper and the glass, the wear degree of the blade, or changes in the cleanliness of the glass surface, and then automatically adjust the wiper operating parameters (such as wiping speed and pressure compensation) or issue maintenance reminders, thereby effectively improving the wiping effect, avoiding abnormal noise or jumping of the wiper blade, extending the service life of the wiper, and enhancing driving safety and driving experience.

[0134] Figure 8 A structural schematic diagram of an embodiment of the vehicle provided by the present invention is shown, as follows. Figure 8 As shown, the vehicle may include: a processor 82, a communications interface 84, a memory 88, and a communications bus 88.

[0135] The processor 82, communication interface 84, and memory 88 communicate with each other via communication bus 88. Communication interface 84 is used to communicate with other network elements such as clients or other servers. The processor 82 executes program 80, specifically performing the relevant steps in the above method embodiments.

[0136] Specifically, program 80 may include program code, which includes computer-executable instructions.

[0137] Processor 82 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention. The vehicle may include one or more processors of the same type, such as one or more CPUs, or processors of different types, such as one or more CPUs and one or more ASICs.

[0138] Memory 88 is used to store program 80. Memory 88 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0139] Program 80 can be called by processor 82 to cause the vehicle to perform the following operations:

[0140] Acquire pressure magnitude and pressure distribution information; the pressure magnitude and pressure distribution information are determined based on the current pressure signal detected by a thin-film pressure sensor located in the wiper blade or attached to the windshield at the starting area of ​​the wiper movement;

[0141] Based on the pressure magnitude and pressure distribution information, execute the preset operation.

[0142] In one or more embodiments, a preset operation is performed based on pressure magnitude information and pressure distribution information, including:

[0143] When the pressure information meets the first set condition or the pressure distribution information meets the second set condition, a first prompt message is generated to remind the user to check the wiper blades.

[0144] In one or more embodiments, a preset operation is performed based on pressure magnitude information and pressure distribution information, including:

[0145] When the pressure information meets the first set condition, control the wiper motor corresponding to the wiper blade to increase the working torque to the first torque, and / or control the extension rod of the push rod in the wiper arm to extend downward by the first displacement.

[0146] In one or more embodiments, the pressure magnitude information includes an average pressure magnitude determined based on the current pressure signal; the pressure distribution information includes a pressure distribution variance determined based on the current pressure signal.

[0147] The first set condition includes: the average pressure is less than the first preset pressure threshold.

[0148] The second set condition includes: the pressure distribution variance is greater than the second preset pressure distribution variance.

[0149] In one or more embodiments, obtaining pressure magnitude information and pressure distribution information includes:

[0150] Acquire the current pressure signal and preprocess it to obtain a preprocessed signal;

[0151] Pressure magnitude and pressure distribution information are obtained based on the preprocessed signal.

[0152] In one or more embodiments, acquiring a current pressure signal and preprocessing the current pressure signal to obtain a preprocessed signal includes:

[0153] Based on a first preset frequency, noise in the current pressure signal is filtered to obtain a filtered preprocessed signal.

[0154] In one or more embodiments, acquiring a current pressure signal and preprocessing the current pressure signal to obtain a preprocessed signal includes:

[0155] Get the current temperature information;

[0156] Based on the current temperature information, the current pressure signal is compensated using a preset temperature compensation model to obtain the preprocessed signal.

[0157] In one or more embodiments, acquiring a current pressure signal and preprocessing the current pressure signal to obtain a preprocessed signal includes:

[0158] Get current vehicle speed information;

[0159] Based on the current vehicle speed information, the current pressure signal is compensated using a preset vehicle speed compensation model to obtain a compensated preprocessed signal.

[0160] In one or more embodiments, acquiring a current pressure signal and preprocessing the current pressure signal to obtain a preprocessed signal includes:

[0161] According to the preset conversion strategy, the current pressure signal is converted and processed to obtain the converted preprocessed signal; the conversion strategy is obtained by fitting at least one pressure signal and at least one calibration pressure information.

[0162] As can be seen from the above, the vehicle provided by the embodiments of the present invention can detect the current pressure signal when the wiper is in contact with the glass in real time through a thin-film pressure sensor installed in the wiper blade or attached to the wiper movement starting area on the windshield, and obtain accurate pressure magnitude and pressure distribution information accordingly; it can dynamically determine the contact state between the wiper and the glass, the wear degree of the blade, or the change in the cleanliness of the glass surface, and then automatically adjust the wiper operating parameters (such as wiping speed and pressure compensation) or issue maintenance reminders, thereby effectively improving the wiping effect, avoiding wiper blade noise or jumping, extending the wiper service life, and enhancing driving safety and driving experience.

[0163] This invention provides a computer-readable storage medium storing at least one executable instruction that, when executed on a wiper control device / vehicle, causes the wiper control device / vehicle to perform the wiper control method in any of the above-described method embodiments.

[0164] Specifically, the executable instructions can be used to cause the wiper control unit / vehicle to perform the following operations:

[0165] Acquire pressure magnitude and pressure distribution information; the pressure magnitude and pressure distribution information are determined based on the current pressure signal detected by a thin-film pressure sensor located in the wiper blade or attached to the windshield at the starting area of ​​the wiper movement;

[0166] Based on the pressure magnitude and pressure distribution information, execute the preset operation.

[0167] In one or more embodiments, a preset operation is performed based on pressure magnitude information and pressure distribution information, including:

[0168] When the pressure information meets the first set condition or the pressure distribution information meets the second set condition, a first prompt message is generated to remind the user to check the wiper blades.

[0169] In one or more embodiments, a preset operation is performed based on pressure magnitude information and pressure distribution information, including:

[0170] When the pressure information meets the first set condition, control the wiper motor corresponding to the wiper blade to increase the working torque to the first torque, and / or control the extension rod of the push rod in the wiper arm to extend downward by the first displacement.

[0171] In one or more embodiments, the pressure magnitude information includes an average pressure magnitude determined based on the current pressure signal; the pressure distribution information includes a pressure distribution variance determined based on the current pressure signal.

[0172] The first set condition includes: the average pressure is less than the first preset pressure threshold.

[0173] The second set condition includes: the pressure distribution variance is greater than the second preset pressure distribution variance.

[0174] In one or more embodiments, obtaining pressure magnitude information and pressure distribution information includes:

[0175] Acquire the current pressure signal and preprocess it to obtain a preprocessed signal;

[0176] Pressure magnitude and pressure distribution information are obtained based on the preprocessed signal.

[0177] In one or more embodiments, acquiring a current pressure signal and preprocessing the current pressure signal to obtain a preprocessed signal includes:

[0178] Based on a first preset frequency, noise in the current pressure signal is filtered to obtain a filtered preprocessed signal.

[0179] In one or more embodiments, acquiring a current pressure signal and preprocessing the current pressure signal to obtain a preprocessed signal includes:

[0180] Get the current temperature information;

[0181] Based on the current temperature information, the current pressure signal is compensated using a preset temperature compensation model to obtain the preprocessed signal.

[0182] In one or more embodiments, acquiring a current pressure signal and preprocessing the current pressure signal to obtain a preprocessed signal includes:

[0183] Get current vehicle speed information;

[0184] Based on the current vehicle speed information, the current pressure signal is compensated using a preset vehicle speed compensation model to obtain a compensated preprocessed signal.

[0185] In one or more embodiments, acquiring a current pressure signal and preprocessing the current pressure signal to obtain a preprocessed signal includes:

[0186] According to the preset conversion strategy, the current pressure signal is converted and processed to obtain the converted preprocessed signal; the conversion strategy is obtained by fitting at least one pressure signal and at least one calibration pressure information.

[0187] As can be seen from the above, the vehicle / wiper control device provided in this embodiment of the invention can detect the current pressure signal when the wiper is in contact with the glass in real time through a thin-film pressure sensor installed in the wiper blade or attached to the wiper movement starting area on the windshield, and obtain accurate pressure magnitude and pressure distribution information accordingly; it can dynamically determine the contact state between the wiper and the glass, the wear degree of the blade, or changes in the cleanliness of the glass surface, and then automatically adjust the wiper operating parameters (such as wiping speed and pressure compensation) or issue maintenance reminders, thereby effectively improving the wiping effect, avoiding wiper blade noise or jumping, extending the wiper service life, and enhancing driving safety and driving experience.

[0188] This invention provides a computer program product, including a computer program that, when executed by a processor, implements the operation of the aforementioned windshield wiper control method.

[0189] Its implementation principle and technical effects are as disclosed above.

[0190] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0191] The methods disclosed in the various method embodiments provided by this invention can be arbitrarily combined without conflict to obtain new method embodiments.

[0192] The features disclosed in the various product embodiments provided by this invention can be arbitrarily combined without conflict to obtain new product embodiments.

[0193] The features disclosed in the various method or device embodiments provided by the present invention can be arbitrarily combined without conflict to obtain new method or device embodiments.

[0194] It should be noted that the aforementioned computer-readable storage media can be ROM, Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Ferromagnetic Random Access Memory (FRAM), Flash Memory, Magnetic Surface Memory, Optical Disc, or Compact Disc Read-Only Memory (CD-ROM), etc. It can also be various vehicles that include one or any combination of the above-mentioned storage media.

[0195] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0196] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0197] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware nodes. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, air conditioner, vehicle terminal, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0198] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatuses, devices, and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0199] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0200] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The algorithms or displays provided herein for the functions specified in the boxes or boxes are not inherently related to any particular computer, virtual system, or other device. Furthermore, the embodiments of this invention are not directed to any particular programming language.

[0201] It should be noted that the above embodiments are illustrative of the invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names. The steps in the above embodiments, unless otherwise specified, should not be construed as limiting the order of execution.

Claims

1. A method for controlling a windshield wiper, characterized in that, The method includes: Acquire pressure magnitude information and pressure distribution information; the pressure magnitude information and pressure distribution information are determined based on the current pressure signal detected by a thin-film pressure sensor located in the wiper blade or attached to the windshield at the starting area of ​​wiper movement; Based on the pressure magnitude information and the pressure distribution information, a preset operation is performed.

2. The method according to claim 1, characterized in that, The step of performing a preset operation based on the pressure magnitude information and the pressure distribution information includes: When the pressure magnitude information meets the first set condition or the pressure distribution information meets the second set condition, a first prompt message is generated. The first prompt message is used to prompt the user to check the wiper blade.

3. The method according to claim 2, characterized in that, The step of performing a preset operation based on the pressure magnitude information and the pressure distribution information includes: When the pressure information meets the first set condition, the wiper motor corresponding to the wiper blade is controlled to increase its working torque to the first torque, or / and the telescopic rod of the push rod in the wiper arm is controlled to extend downward by the first displacement.

4. The method according to claim 2 or 3, characterized in that, The pressure magnitude information includes the average pressure magnitude determined based on the current pressure signal; the pressure distribution information includes the pressure distribution variance determined based on the current pressure signal. The first set condition includes: the average pressure is less than a first preset pressure threshold; The second setting condition includes: the pressure distribution variance is greater than the second preset pressure distribution variance.

5. The method according to any one of claims 1-4, characterized in that, The acquisition of pressure magnitude information and pressure distribution information includes: The current pressure signal is acquired, and the current pressure signal is preprocessed to obtain a preprocessed signal; The pressure magnitude information and the pressure distribution information are obtained based on the preprocessed signal.

6. The method according to claim 5, characterized in that, The step of acquiring the current pressure signal and preprocessing the current pressure signal to obtain a preprocessed signal includes: Based on a first preset frequency, noise in the current pressure signal is filtered to obtain a filtered preprocessed signal.

7. The method according to claim 5, characterized in that, The step of acquiring the current pressure signal and preprocessing the current pressure signal to obtain a preprocessed signal includes: Get the current temperature information; Based on the current temperature information, the current pressure signal is compensated using a preset temperature compensation model to obtain a preprocessed signal after temperature compensation.

8. The method according to claim 5, characterized in that, The step of acquiring the current pressure signal and preprocessing the current pressure signal to obtain a preprocessed signal includes: Get current vehicle speed information; Based on the current vehicle speed information, the current pressure signal is compensated using a preset vehicle speed compensation model to obtain a preprocessed signal after vehicle speed compensation.

9. The method according to claim 5, characterized in that, The step of acquiring the current pressure signal and preprocessing the current pressure signal to obtain a preprocessed signal includes: According to a preset conversion strategy, the current pressure signal is converted to obtain a pre-processed signal; the conversion strategy is obtained by fitting at least one pressure signal and at least one calibration pressure information.

10. A vehicle, characterized in that, include: The processor, memory, communication interface, and communication bus are provided, wherein the processor, memory, and communication interface communicate with each other via the communication bus. The memory is used to store at least one executable instruction that causes the processor to perform the operation of the wiper control method as described in any one of claims 1-9.

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