Automobile washing environment pressure tolerance comprehensive evaluation system and evaluation method

Abstract

The invention relates to an automobile washing environment pressure tolerance comprehensive evaluation system and evaluation method, through an automatic automobile washing device with adjustable automobile washing parameters, different automobile washing working conditions can be automatically simulated, diversified automobile washing scenes from conventional washing to extreme high-pressure washing can be simulated, a pressure fluctuation range in a real environment is covered, manual intervention is not needed, and the system and the method have the advantages that the system and the method are simple and convenient to operate. The test time is greatly shortened, the pressure acquisition unit simultaneously acquires pressure data in a plurality of preset areas on the outer surface of the vehicle, the problem of low efficiency of point-by-point test in a traditional device is avoided, and the data analysis unit receives data of the pressure acquisition unit and calculates the median and the standard deviation of the preset areas under a plurality of vehicle washing working conditions. The pressure median and the standard deviation are calculated through a statistical analysis algorithm, the real working condition of the key part of the automobile under continuous load (median) and dynamic impact (standard deviation) is revealed, and a basis is provided for lightweight design (such as non-key low-fluctuation area weight reduction) and redundancy design (such as high-fluctuation area structure strengthening).

Description

Technical Field

[0001] The present application relates to the field of vehicle body pressure tolerance assessment, and specifically to a comprehensive assessment system and method for pressure tolerance in a car wash environment. Background Art

[0002] With the rapid development of the automotive industry and consumers' increasing demands for car wash service quality, automatic car washes have become a vital component of the industry. These machines utilize automated technology to clean, wax, and air-dry vehicles. They utilize components such as robotic arms, spray systems, and brushes to efficiently clean vehicle exteriors. They are widely used in gas stations, parking lots, and car detailing shops.

[0003] In related technologies, the pressure a vehicle is subjected to varies when facing different car washing conditions. Excessive pressure can cause scratches on the paint surface. Real-time monitoring and recording of the pressure exerted on key parts of the car during the car wash process is of great significance in providing a scientific basis for the optimization of key parts of the car. However, traditional devices for evaluating the pressure tolerance of a car in a car wash environment have single test conditions and test point by point, resulting in insufficient accuracy and low test efficiency. Summary of the Invention

[0004] The present application provides a comprehensive evaluation system and method for the pressure tolerance of a car wash environment, which can solve the problem that the traditional device for evaluating the pressure tolerance of a car wash environment has a single test condition and tests point by point, resulting in insufficient accuracy and low test efficiency.

[0005] In a first aspect, an embodiment of the present application provides a comprehensive assessment system for pressure tolerance of a car wash environment, comprising:

[0006] An automatic car washing device with adjustable car washing parameters, which is used to control the water spray pressure, water flow rate and scrubbing force to simulate different car washing conditions;

[0007] A pressure collection unit is deployed at multiple preset areas on the vehicle's exterior surface, and is used to collect real-time pressure data from the multiple preset areas during the car wash process;

[0008] A data analysis unit is connected to the pressure acquisition unit, and is used to receive the pressure data collected by the pressure acquisition unit and calculate the median and standard deviation of a preset area under a car wash condition.

[0009] In conjunction with the first aspect, in one embodiment, the comprehensive assessment system for pressure tolerance of a car wash environment further includes:

[0010] A data processing unit is connected between the pressure acquisition unit and the data analysis unit. The data processing unit is used to perform signal conditioning, analog-to-digital conversion and anti-interference processing based on the pressure signal of the pressure acquisition unit, and then transmit the standardized data to the data analysis unit.

[0011] In conjunction with the first aspect, in one embodiment, the comprehensive assessment system for pressure tolerance of a car wash environment further includes:

[0012] An active safety protection unit is connected to the automatic car washing device with adjustable car washing parameters and the data analysis unit. The active safety protection unit is used to control the operation of the automatic car washing device with adjustable car washing parameters to stop when the pressure data received by the data analysis unit from the pressure acquisition unit exceeds a set threshold or the pressure acquisition unit fails.

[0013] In conjunction with the first aspect, in one embodiment, the automatic car washing device with adjustable car washing parameters includes:

[0014] Multi-degree-of-freedom robotic arm;

[0015] a water pump connected to the end of the first robotic arm of the multi-degree-of-freedom robotic arm;

[0016] Rotating bristles, the rotating brush is connected to the end of the second robotic arm of the multi-degree-of-freedom robotic arm;

[0017] A linear drive mechanism, wherein the linear drive mechanism is equipped with a rotating roller brush, and the linear drive mechanism can drive the rotating roller brush to move along the length direction of the vehicle body;

[0018] A controller is connected to the multi-degree-of-freedom robotic arm, the water pump, the rotating bristles, the linear drive mechanism and the rotating roller brush.

[0019] In combination with the first aspect, in one embodiment, the pressure acquisition unit includes:

[0020] A thin film pressure sensor array 1, which is arranged on the door glass via a suction cup and is used to collect real-time pressure data on the door glass during the car wash process;

[0021] The second thin film pressure sensor array is arranged on the vehicle door via a suction cup and is used to collect the pressure data exerted on the vehicle door during the car washing process in real time.

[0022] In combination with the first aspect, in one embodiment, the pressure acquisition unit includes:

[0023] A cylindrical drum, which is movably mounted on the rear trunk via a mounting bracket, and whose upper surface is flush with the roof of the vehicle, and is used to bear the pressure applied by the automatic car washing device with adjustable car washing parameters;

[0024] An indirect pressure sensor is movably mounted on the rear trunk via a suction cup and contacts the lower surface of the cylindrical drum.

[0025] In conjunction with the first aspect, in one embodiment, the comprehensive assessment system for pressure tolerance of a car wash environment further includes:

[0026] A pressure distribution visualization unit is connected to the automatic car washing device with adjustable car washing parameters, the pressure acquisition unit and the data analysis unit. The pressure distribution visualization unit is used to display the pressure distribution of multiple preset areas in real time, making it convenient for operators to monitor and adjust the car washing conditions.

[0027] In a second aspect, embodiments of the present application provide an evaluation method for a comprehensive evaluation system for pressure tolerance of a car wash environment as described in some of the above embodiments, which includes the following steps:

[0028] Using an automatic car washing device with adjustable car washing parameters to control the combined parameters of water spray pressure, water flow rate and scrubbing force, simulate different car washing conditions, and simultaneously collect pressure data from multiple preset areas on the vehicle's outer surface;

[0029] The data analysis unit is used to calculate the median and standard deviation of the preset area under the car wash condition.

[0030] In conjunction with the second aspect, in one embodiment, before using the automatic car washing device with adjustable car washing parameters to control the combined parameters of water spray pressure, water flow rate, and scrubbing force to simulate different car washing conditions and simultaneously collect pressure data of multiple preset areas on the vehicle's outer surface, the method further includes:

[0031] An automatic car washing device with adjustable car washing parameters is used to apply a reference pressure to the vehicle surface, and the pressure acquisition unit is self-calibrated to eliminate installation errors.

[0032] In conjunction with the second aspect, in one embodiment, calculating the median and standard deviation of a preset area under a car wash condition using a data analysis unit includes:

[0033] The data processing unit performs signal conditioning, analog-to-digital conversion, and anti-interference processing on the pressure signal collected by the pressure collection unit, and then transmits the standardized data to the data analysis unit;

[0034] The data analysis unit is used to calculate the median and standard deviation of the preset area under the car wash condition.

[0035] The beneficial effects of the technical solutions provided in the embodiments of the present application include:

[0036] Through the automatic car washing device with adjustable car washing parameters, the system can automatically simulate different car washing conditions, simulating a variety of car washing scenarios from conventional washing to extreme high-pressure washing, covering the pressure fluctuation range in the real environment, without the need for human intervention, and greatly shortening the test time. The pressure acquisition unit simultaneously collects pressure data in multiple preset areas on the outer surface of the vehicle, avoiding the inefficiency of point-by-point testing in traditional devices. The data analysis unit processes the collected pressure data in real time. Traditional methods rely on extreme pressure tests, while the median + standard deviation combination reveals the real working conditions of key parts of the car under continuous load (median) and dynamic impact (standard deviation), providing a quantitative basis for lightweight design (such as weight reduction in non-critical low-fluctuation areas) and redundant design (such as structural strengthening in high-fluctuation areas). BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0038] Figure 1 This is a schematic diagram of the structure in which the cylindrical roller is movably installed in the rear trunk;

[0039] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of A in the middle.

[0040] In the figure: 1. Trunk; 2. Rotating roller brush; 3. Cylindrical roller; 4. Indirect pressure sensor. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] The embodiments of the present application provide a comprehensive evaluation system and optimization method for the pressure tolerance of a car wash environment, which can solve the problem that the traditional device for evaluating the pressure tolerance of a car wash environment has a single test condition and tests point by point, resulting in insufficient accuracy and low test efficiency.

[0043] In a first aspect, an embodiment of the present application provides a comprehensive assessment system for pressure tolerance of a car wash environment, comprising: an automatic car wash device with adjustable car wash parameters, which is used to control the water spray pressure, water flow rate and brushing force to simulate different car wash conditions; a pressure acquisition unit, which is deployed in multiple preset areas on the outer surface of the vehicle, and the pressure acquisition unit is used to collect pressure data of multiple preset areas in real time during the car wash process; a data analysis unit, which is connected to the pressure acquisition unit, and the data analysis unit is used to receive the pressure data collected by the pressure acquisition unit and calculate the median and standard deviation of the preset areas under the car wash conditions.

[0044] In this embodiment, an automatic car washing device with adjustable car washing parameters can automatically control the water spray pressure, water flow rate and scrubbing force to simulate a variety of car washing scenarios from conventional washing to extremely high-pressure washing. An automated control system is used to simulate different car washing conditions through preset programs or real-time parameter adjustment, covering the pressure fluctuation range in the real environment, ensuring the comprehensiveness and authenticity of the test without manual intervention, significantly shortening the test time and improving the test efficiency. Pressure collection units are deployed in multiple preset areas on the vehicle's outer surface to collect real-time pressure data from various areas during the car washing process. They are distributed in key parts of the vehicle (such as doors, hood, roof, etc.) Through multi-point synchronous collection, the inefficiency of traditional point-by-point testing is avoided, ensuring the comprehensiveness and real-time nature of data collection; the data analysis unit receives data from the pressure collection unit, and calculates the median and standard deviation of the preset area under multiple car washing conditions, processes the collected pressure data in real time, and calculates the median and standard deviation of pressure through statistical analysis algorithms. Traditional methods rely on extreme pressure tests, while the combination of median + standard deviation reveals the true working conditions of key parts of the car under continuous load (median) and dynamic impact (standard deviation), providing a quantitative basis for lightweight design (such as weight reduction in non-critical low-fluctuation areas) and redundant design (such as structural strengthening in high-fluctuation areas).

[0045] For example, in the optimization of car door sealing strips (steady-state pressure control), 100 sets of car wash data were collected, and the median pressure of the car door welds was 2.5 MPa (excluding the highest / lowest 10% extreme values). The optimization plan was: set the sealing strip pressure threshold to the range of 2.5-2.8 MPa (covering 90% of normal working conditions) to avoid excessive redundant design caused by occasional 4.0 MPa peaks, reduce material costs by 18%, and reduce the probability of sealing failure from 5.3% to 0.7%; standard deviation assisted verification, and the standard deviation of 0.12 MPa indicated that the pressure fluctuation was controllable, allowing the use of lightweight TPE materials to replace traditional rubber. For example, the bumper's impact resistance is optimized (dynamic fluctuation suppression). The standard deviation of the bumper pressure reaches 0.41MPa (only 0.08MPa for the roof), indicating the risk of high-frequency impact. The optimization solution is to embed a honeycomb aluminum buffer layer in the area with a standard deviation > 0.4MPa to disperse the impact energy. The median is used to calibrate the design benchmark, and the median of 1.2MPa is used to determine the buffer layer stiffness requirement to avoid energy rebound caused by excessive rigidity. After optimization, the standard deviation is reduced to 0.25MPa, and the paint damage rate is reduced by 64%.

[0046] In combination with the first aspect, in one embodiment, a data processing unit is connected between the pressure acquisition unit and the data analysis unit. The data processing unit is used to perform signal conditioning, analog-to-digital conversion and anti-interference processing based on the pressure signal of the pressure acquisition unit, and then transmit the standardized data to the data analysis unit.

[0047] In this embodiment, the raw pressure signal transmitted by the pressure acquisition unit is amplified, filtered, and denoised to ensure that the signal quality meets the requirements of subsequent processing. The conditioned analog signal is converted into a digital signal to facilitate efficient processing by the data analysis unit. Digital filtering and error correction techniques are used to eliminate environmental noise and interference during signal transmission, improving data accuracy and reliability. The processed data is standardized according to a preset format and transmitted to the data analysis unit to ensure data consistency and analyzability. Through the above-mentioned technical means, the data processing unit achieves efficient processing of pressure signals, providing high-quality data support for the data analysis unit, thereby improving the overall performance and testing efficiency of the system.

[0048] In combination with the first aspect, in one embodiment, an active safety protection unit is connected to the automatic car washing device with adjustable car washing parameters and the data analysis unit. The active safety protection unit is used to control the stopping of the operation of the automatic car washing device with adjustable car washing parameters when the pressure data received by the data analysis unit from the pressure acquisition unit exceeds a set threshold or the pressure acquisition unit fails.

[0049] In this embodiment, the active safety protection unit receives the pressure data processed by the data analysis unit in real time and compares it with the preset safety threshold. When the pressure data exceeds the set threshold, the safety protection mechanism is immediately triggered. The active safety protection unit also monitors the working status of the pressure acquisition unit. When a failure of the pressure acquisition unit (such as signal loss or data anomaly) is detected, the fault response program is automatically initiated. In the event of pressure data exceeding the limit or a failure of the pressure acquisition unit, the active safety protection unit sends a stop command to the automatic car wash device with adjustable car wash parameters, immediately terminating the car wash operation to avoid further damage to the vehicle. Through real-time monitoring and a rapid response mechanism, the active safety protection unit significantly improves the safety and reliability of the car wash process, ensuring that the vehicle is protected from the potential risks of high pressure or equipment failure during the car wash process. Through the above technical means, the active safety protection unit realizes dynamic monitoring and active protection of the car wash process, effectively ensuring the safety of vehicles and equipment.

[0050] In combination with the first aspect, in one embodiment, the automatic car washing device with adjustable car washing parameters includes: a multi-degree-of-freedom robotic arm; a water pump, the water pump is connected to the first robotic arm end of the multi-degree-of-freedom robotic arm; rotating bristles, the rotating brush is connected to the second robotic arm end of the multi-degree-of-freedom robotic arm; a linear drive mechanism, the linear drive mechanism is equipped with a rotating roller brush 2, and the linear drive mechanism can drive the rotating roller brush 2 to move along the length direction of the vehicle body; a controller, the controller is connected to the multi-degree-of-freedom robotic arm, the water pump, the rotating bristles, the linear drive mechanism and the rotating roller brush 2.

[0051] In this embodiment, the multi-degree-of-freedom robotic arm provides flexible movement and positioning capabilities to ensure that the car washing device can cover all areas of the car body. It adopts a multi-degree-of-freedom design and supports movement in multiple directions (such as up and down, left and right, front and back, etc.) to adapt to different car models and car body curves. Through high-precision servo motors and motion control algorithms, precise positioning and motion control of the robotic arm are achieved; the water pump provides adjustable water flow pressure to simulate the flushing effects under different car washing conditions. It is connected to the first arm end of the multi-degree-of-freedom robotic arm to ensure that the water flow can be accurately sprayed to the target area. It is equipped with a pressure regulating valve and a flow controller to achieve dynamic adjustment of the water spray pressure, covering a variety of scenarios from conventional flushing to extreme high-pressure flushing; the rotating bristles are used to simulate the brushing process to clean the surface of the car body. It is connected to the second arm end of the multi-degree-of-freedom robotic arm, supports rotation and swinging motion to ensure uniform brushing effect, and adopts an adjustable speed motor to adjust the bristles according to the car washing conditions. The linear drive mechanism drives the rotating roller brush 2 to move along the length of the vehicle body, covering the entire vehicle body's scrubbing needs. The rotating roller brush 2 is installed, and smooth linear motion is achieved through a linear guide and a drive motor. Speed adjustment is supported, ensuring that the roller brush's movement speed and scrubbing force are adjustable under different working conditions. The rotating roller brush 2 is used for large-area scrubbing operations, improving car washing efficiency. It is installed on the linear drive mechanism and driven by a rotary motor to achieve efficient scrubbing. Soft bristle material is used to avoid scratching the vehicle paint. The controller coordinates and controls the operation of various parts of the car wash device to achieve automated car washing operations. It is connected to the multi-degree-of-freedom robotic arm, water pump, rotating bristles, linear drive mechanism, and rotating roller brush 2. The movements of each part are controlled by preset programs or real-time instructions. An integrated sensor feedback system monitors the device status and car washing results in real time, dynamically adjusting parameters to ensure car washing quality. Through the above technical means, the automatic car wash device with adjustable car wash parameters achieves efficient, flexible, and safe automated car washing operations, meeting the needs of diverse car washing scenarios.

[0052] In combination with the first aspect, in one embodiment, the pressure collection unit includes: a thin film pressure sensor array 1, which is arranged on the vehicle door glass via a suction cup, and is used to collect the pressure data of the vehicle door glass in real time during the car washing process; a thin film pressure sensor array 2, which is arranged on the vehicle door via a suction cup, and is used to collect the pressure data of the vehicle door in real time during the car washing process.

[0053] In this embodiment, the thin film pressure sensor array 1 is fixed to the surface of the car door glass by a suction cup, and the pressure data of the car door glass during the car washing process is collected in real time to ensure that the pressure of the car washing device on the glass is within a safe range. The flexible thin film pressure sensor is used, which can adapt to the curved surface structure of the car door glass to ensure the accuracy of data collection. It has high sensitivity and fast response capabilities, and can monitor pressure changes in real time to avoid damage to the glass due to excessive pressure; the thin film pressure sensor array 2 is fixed to the surface of the car door by a suction cup, and the pressure data of the car door during the car washing process is collected in real time to ensure that the pressure of the car washing device on the car door is within a reasonable range. The flexible thin film pressure sensor is used to be able to The system can adapt to the irregular surface of the vehicle door, ensuring comprehensive data collection. It also has excellent anti-interference capabilities and can operate stably in complex environments, avoiding data distortion caused by environmental factors. Through thin film pressure sensor arrays 1 and 2, it can collect real-time pressure data from the vehicle door glass and door, ensuring the safety of the car wash process. The flexible thin film pressure sensor has high sensitivity and rapid response capabilities, accurately capturing pressure changes and avoiding damage to the vehicle. The sensor is made of flexible materials and can adapt to the curved surface structures of the vehicle door and glass, ensuring comprehensive and accurate data collection. The sensor can still operate stably in complex environments, ensuring the reliability of data collection. Through the above technical means, the pressure acquisition unit achieves real-time monitoring of the vehicle door glass and door pressure, providing strong protection for the safety and reliability of the car wash process.

[0054] In combination with the first aspect, in one embodiment, Figure 1 and Figure 2 As shown, the pressure acquisition unit includes: a cylindrical drum 3, which is movably mounted on the rear trunk 1 via a mounting bracket so that the cylindrical drum 3 can move downward along the vehicle body height direction when under pressure, and the upper surface of the cylindrical drum 3 is flush with the vehicle roof, and is used to bear the pressure applied by the automatic car washing device with adjustable car washing parameters; and an indirect pressure sensor 4, which is movably mounted on the rear trunk 1 via a suction cup and contacts the lower surface of the cylindrical drum 3. The mounting bracket is not directly shown in the figure. The mounting bracket is set on the ground, and the vehicle is located inside the mounting bracket. Slide grooves are formed on two opposite inner sides of the mounting bracket. The two ends of the cylindrical drum 3 are placed in the corresponding slide grooves via flexible pads. When the cylindrical drum 3 is cleaned by the pressure applied by the rotating drum brush 2, the cylindrical drum 3 slides downward in the slide groove, squeezing the flexible pad to cause displacement, causing the indirect pressure sensor 4 to be compressed and collect its pressure signal.

[0055] In this embodiment, a cylindrical drum 3 is movably mounted to the trunk 1 via a mounting bracket, with its upper surface flush with the vehicle roof. It is used to bear the pressure applied by an automatic car wash device with adjustable wash parameters, ensuring stable and uniform pressure transmission. The cylindrical design evenly distributes the pressure applied by the car wash device, avoiding excessive localized pressure. The mounting bracket ensures that the drum is flush with the vehicle roof, preventing uneven pressure transmission due to height differences. An indirect pressure sensor 4 is fixed to the trunk 1 via a suction cup and contacts the lower surface of the cylindrical drum 3. This sensor collects real-time pressure data on the cylindrical drum 3, indirectly reflecting the pressure applied by the car wash device on the vehicle roof. This indirect measurement method prevents direct exposure of the sensor to the car wash environment, improving its durability and reliability. The suction cup mounting method facilitates installation and removal while ensuring stable contact between the sensor and the drum. The cylindrical drum 3 design ensures uniform pressure distribution and avoids local damage to the roof. The indirect pressure sensor 4 can accurately collect pressure data by contacting the lower surface of the drum, ensuring the safety of the car washing process. The suction cup fixing method simplifies the installation and removal process of the sensor and improves the maintainability of the equipment. The indirect measurement method avoids direct exposure of the sensor to the car washing environment and direct contact with the rotating drum brush 2, thereby extending the service life of the sensor.

[0056] In combination with the first aspect, in one embodiment, the comprehensive assessment system for pressure tolerance of a car wash environment further includes: a pressure distribution visualization unit, which is connected to the automatic car wash device with adjustable car wash parameters, the pressure acquisition unit and the data analysis unit. The pressure distribution visualization unit is used to display the pressure distribution of multiple preset areas in real time, so as to facilitate operators to monitor and adjust the car wash conditions.

[0057] In this embodiment, a pressure distribution visualization unit is connected to an automatic car wash device with adjustable car wash parameters, a pressure acquisition unit, and a data analysis unit. It displays the pressure distribution of multiple preset areas in real time, facilitating operator monitoring and adjustment of car wash conditions. A graphical interface intuitively displays pressure data, helping operators quickly identify areas with abnormal pressure. This allows for comparison of pressure distribution across multiple areas, facilitating optimization of car wash parameters and improving cleaning effectiveness. The pressure data collected in real time by the pressure acquisition unit is processed by the data analysis unit and then transmitted to the pressure distribution visualization unit. The visualization unit is linked to the automatic car wash device with adjustable car wash parameters to dynamically adjust car wash parameters based on the pressure distribution. Through the visualization unit, operators can monitor the pressure distribution during the car wash process in real time, ensuring safety. The graphical interface makes pressure data easier to understand and analyze, improving operational efficiency and supporting dynamic adjustment of car wash parameters based on the pressure distribution. Comparison of pressure distribution across multiple areas facilitates identification and resolution of localized pressure anomalies. Through the aforementioned technical means, the pressure distribution visualization unit enables real-time monitoring and dynamic adjustment of pressure distribution during the car wash process, effectively ensuring safety and cleaning effectiveness.

[0058] In a second aspect, embodiments of the present application provide an evaluation method for a comprehensive evaluation system for pressure tolerance of a car wash environment as described in some of the above embodiments, which includes the following steps:

[0059] S100: Using an automatic car washing device with adjustable car washing parameters to control the combined parameters of water spray pressure, water flow rate, and scrubbing force, simulate different car washing conditions, and simultaneously collect pressure data from multiple preset areas on the vehicle's exterior surface;

[0060] S200: Calculate the median and standard deviation of the preset area under the car wash condition using the data analysis unit.

[0061] In this embodiment, S100 simulates different car washing conditions and collects pressure data. An automatic car washing device with adjustable car washing parameters is used to control the combined parameters of water spray pressure, water flow rate and scrubbing force to simulate a variety of different car washing conditions. During the simulated car washing process, pressure data of multiple preset areas on the outer surface of the vehicle are synchronously collected to ensure that the data coverage is comprehensive and representative; S200 calculates the median and standard deviation. The data analysis unit receives the data from the pressure collection unit and calculates the median and standard deviation of the preset area under multiple car washing conditions. The collected pressure data is processed in real time, and the pressure median and standard deviation are calculated through a statistical analysis algorithm. Traditional methods rely on extreme pressure tests, while the combination of median + standard deviation reveals the actual working conditions of key parts of the car under continuous load (median) and dynamic impact (standard deviation), providing a quantitative basis for lightweight design (such as weight reduction in non-critical low-fluctuation areas) and redundant design (such as structural strengthening in high-fluctuation areas).

[0062] In conjunction with the second aspect, in one embodiment, before S100, the method further includes:

[0063] S000: Use an automatic car washing device with adjustable car washing parameters to apply a reference pressure to the vehicle surface, perform self-calibration on the pressure acquisition unit, and eliminate installation errors.

[0064] In this embodiment, the S000 self-calibrates the pressure acquisition unit, using an automatic car wash device with adjustable wash parameters to apply a baseline pressure to the vehicle surface. This ensures the accuracy of the pressure acquisition unit in its initial state. This self-calibration process eliminates measurement errors caused by deviations in the pressure acquisition unit's installation position or angle, improving data acquisition reliability. Self-calibration eliminates installation errors, ensuring more accurate data collected by the pressure acquisition unit in subsequent steps. This self-calibration process provides a stable foundation for subsequent car wash simulations and pressure data collection, reducing assessment bias caused by equipment errors.

[0065] In conjunction with the second aspect, in one embodiment, in S200, the following steps are included:

[0066] S200-1: The data processing unit performs signal conditioning, analog-to-digital conversion, and anti-interference processing on the pressure signal collected by the pressure collection unit, and then transmits the standardized data to the data analysis unit;

[0067] S200-2: Calculate the median and standard deviation of the preset area under the car wash condition using the data analysis unit.

[0068] In this embodiment, S200-1 pressure signal processing and standardized transmission involves using a data processing unit to perform signal conditioning on the pressure signal collected by the pressure acquisition unit, including operations such as amplification and filtering, to improve signal quality. The conditioned analog signal is converted into a digital signal to facilitate subsequent data analysis and processing. Anti-interference processing is then performed on the converted digital signal to eliminate noise and abnormal data, ensuring data accuracy and reliability. The processed standardized data is then transmitted to the data analysis unit, providing a high-quality data foundation for subsequent median and standard deviation calculations. Signal conditioning and anti-interference processing ensure the accuracy and stability of the pressure signal. Standardized data transmission provides high-quality data input to the data analysis unit, improving the reliability of median and standard deviation calculations. The analog-to-digital conversion and standardization process simplify the data analysis process and enhance overall evaluation efficiency. S200-2 calculates the median and standard deviation, processing the collected pressure data to calculate the median for each preset area under multiple car wash conditions, reflecting the typical pressure level in that area. The standard deviation for different car wash conditions is further calculated to assess the dispersion of the pressure data and reflect the stability of the car wash conditions. By simulating various car wash conditions and collecting multi-area pressure data, the comprehensiveness and representativeness of the evaluation results are ensured. Based on the calculation of the median and standard deviation, the typical level and fluctuation of the pressure distribution can be accurately reflected, providing a scientific basis for the optimization of parameters of key parts of the vehicle. Through the automated processing of the data analysis unit, the evaluation process is simplified and the evaluation efficiency is improved.

[0069] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0070] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0071] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A comprehensive evaluation system for pressure tolerance of a car wash environment, characterized in that: It includes: An automatic car washing device with adjustable car washing parameters, which is used to control the water spray pressure, water flow rate and scrubbing force to simulate different car washing conditions; A pressure collection unit is deployed at multiple preset areas on the vehicle's exterior surface, and is used to collect real-time pressure data from the multiple preset areas during the car wash process; A data analysis unit is connected to the pressure acquisition unit, and is used to receive the pressure data collected by the pressure acquisition unit and calculate the median and standard deviation of a preset area under a car wash condition.

2. The comprehensive evaluation system for pressure tolerance of a car wash environment according to claim 1, characterized in that: The comprehensive evaluation system for car wash environment pressure tolerance also includes: A data processing unit is connected between the pressure acquisition unit and the data analysis unit. The data processing unit is used to perform signal conditioning, analog-to-digital conversion and anti-interference processing based on the pressure signal of the pressure acquisition unit, and then transmit the standardized data to the data analysis unit.

3. The comprehensive evaluation system for pressure tolerance of a car wash environment according to claim 1, characterized in that: The comprehensive evaluation system for car wash environment pressure tolerance also includes: An active safety protection unit is connected to the automatic car washing device with adjustable car washing parameters and the data analysis unit. The active safety protection unit is used to control the operation of the automatic car washing device with adjustable car washing parameters to stop when the pressure data received by the data analysis unit from the pressure acquisition unit exceeds a set threshold or the pressure acquisition unit fails.

4. The comprehensive evaluation system for pressure tolerance of a car wash environment according to claim 1, characterized in that: The automatic car washing device with adjustable car washing parameters includes: Multi-degree-of-freedom robotic arm; a water pump connected to the end of the first robotic arm of the multi-degree-of-freedom robotic arm; Rotating bristles, the rotating brush is connected to the end of the second robotic arm of the multi-degree-of-freedom robotic arm; A linear drive mechanism, wherein the linear drive mechanism is equipped with a rotating roller brush, and the linear drive mechanism can drive the rotating roller brush to move along the length direction of the vehicle body; A controller is connected to the multi-degree-of-freedom robotic arm, the water pump, the rotating bristles, the linear drive mechanism and the rotating roller brush.

5. The comprehensive evaluation system for pressure tolerance of a car wash environment according to claim 1, characterized in that: The pressure acquisition unit includes: A thin film pressure sensor array 1, which is arranged on the door glass via a suction cup and is used to collect real-time pressure data on the door glass during the car wash process; The second thin film pressure sensor array is arranged on the vehicle door via a suction cup and is used to collect the pressure data exerted on the vehicle door during the car washing process in real time.

6. The comprehensive evaluation system for pressure tolerance of a car wash environment according to claim 1, characterized in that: The pressure acquisition unit includes: A cylindrical drum, which is movably mounted on the rear trunk via a mounting bracket, and whose upper surface is flush with the roof of the vehicle, and is used to bear the pressure applied by the automatic car washing device with adjustable car washing parameters; An indirect pressure sensor is movably mounted on the rear trunk via a suction cup and contacts the lower surface of the cylindrical drum.

7. The comprehensive evaluation system for pressure tolerance of a car wash environment according to claim 1, characterized in that: The comprehensive evaluation system for car wash environment pressure tolerance also includes: A pressure distribution visualization unit is connected to the automatic car washing device with adjustable car washing parameters, the pressure acquisition unit and the data analysis unit. The pressure distribution visualization unit is used to display the pressure distribution of multiple preset areas in real time, making it convenient for operators to monitor and adjust the car washing conditions.

8. An evaluation method for a comprehensive evaluation system for pressure tolerance of a car wash environment according to any one of claims 1 to 7, characterized in that: It includes the following steps: An automatic car washing device with adjustable car washing parameters is used to control the combined parameters of water spray pressure, water flow rate, and scrubbing force to simulate different car washing conditions and simultaneously collect pressure data from multiple preset areas on the vehicle's exterior surface. The data analysis unit is used to calculate the median and standard deviation of the preset area under the car wash condition.

9. The evaluation method of the comprehensive evaluation system for pressure tolerance of a car wash environment according to claim 8, characterized in that: It includes the following steps: Before using the automatic car washing device with adjustable car washing parameters to control the combined parameters of water spray pressure, water flow rate and scrubbing force, simulating different car washing conditions, and synchronously collecting pressure data of multiple preset areas on the vehicle's outer surface, the method further includes: An automatic car washing device with adjustable car washing parameters is used to apply a reference pressure to the vehicle surface, and the pressure acquisition unit is self-calibrated to eliminate installation errors.

10. The evaluation method of the comprehensive evaluation system for pressure tolerance of a car wash environment according to claim 8, characterized in that: It includes the following steps: The method of calculating the median and standard deviation of a preset area under a car wash condition using a data analysis unit includes: The data processing unit performs signal conditioning, analog-to-digital conversion, and anti-interference processing on the pressure signal collected by the pressure collection unit, and then transmits the standardized data to the data analysis unit; The data analysis unit is used to calculate the median and standard deviation of the preset area under the car wash condition.

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