A method and system for detecting the sealing performance of a pipeline in a vehicle water system

Abstract

The present disclosure relates to the field of vehicle manufacturing technology, and proposes a method and system for detecting the tightness of a vehicle water system pipeline. Gas is used as a medium, and a pressure regulating device and an intelligent tightness detection instrument are combined to perform a tightness detection on the water system. Vehicle information is collected through a code scanning device, and an adapted detection program is automatically selected to improve detection efficiency and accuracy. The detection time is dynamically adjusted, and an adaptive inflation time control based on factors such as pressure and vehicle type is proposed. By monitoring the air pressure in the pipeline, combining historical data and real-time calculations, the inflation time parameters are dynamically optimized. Through the calculation of the basic inflation time, correction value, and dynamic adjustment value, the precise control of the inflation process is comprehensively realized, and the efficiency and accuracy of the sealing inspection of the vehicle pipeline are effectively controlled.

Description

Technical Field

[0001] The present disclosure relates to the technical field related to vehicle manufacturing, and in particular to a method and system for detecting the sealing performance of a pipeline in a vehicle water system. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art.

[0003] With the development of society, vehicles have become an indispensable part of people's daily travel. In the current vehicle manufacturing industry, the sealing of the vehicle water system is one of the key factors to ensure the normal operation of the vehicle and the comfort of passengers.

[0004] The inventors found in their research that the current sealing test of the vehicle's water system mostly relies on traditional means, such as road testing after filling with antifreeze or manual testing with the help of simple tools. This not only has lags and is time-consuming, but is also easily affected by human factors and may result in missed or misjudgments. The test results are easily affected by the operator's experience, irregular operations, etc., resulting in missed or misjudgments. At some complex pipe connections, the existing manual judgment is technically difficult and it is difficult to fully cover all potential leakage points, thus affecting the accuracy and reliability of the overall test results. Summary of the invention

[0005] In order to solve the above-mentioned problems, the present disclosure proposes a method and system for detecting the sealing performance of the pipelines of a vehicle water system. By using an air source (such as compressed air) as a medium, combined with a pressure regulating device and an intelligent sealing performance detection instrument, the water system is automatically tested for sealing performance. The inflation time is adaptively determined based on factors such as pressure and vehicle type, thereby effectively improving the efficiency of the sealing performance inspection.

[0006] In order to achieve the above objectives, the present disclosure adopts the following technical solutions:

[0007] One or more embodiments provide a method for detecting the sealing performance of a pipeline of a vehicle water system, comprising the following steps:

[0008] Obtaining relevant information of the vehicle to be tested, including vehicle information, pressure setting values, and environmental parameters;

[0009] Determine the basic inflation time and the maximum inflation time according to the vehicle model information and environmental parameters;

[0010] According to the vehicle information and the pressure setting value after inflation, the inflation time correction value is obtained;

[0011] Start the gas source to inflate the pipeline of the water system of the vehicle to be tested. During the inflation process, obtain the gas pressure in the pipeline in real time, calculate the pressure change rate, and obtain the dynamic adjustment value of the inflation time according to the change of the pressure change rate;

[0012] The inflation time is updated in real time according to the basic inflation time, the inflation time correction value and the dynamic adjustment value of the inflation time. The inflation is controlled based on the updated inflation time and the maximum inflation time. A sealing test is performed after the inflation is completed.

[0013] A vehicle water system pipeline sealing detection system, comprising: an air source, an intelligent sealing detection instrument, a connecting pipeline and a control terminal;

[0014] The air source is connected to the vehicle water system pipeline through a connecting pipeline to achieve inflation; an intelligent sealing detection instrument is arranged on the connecting pipeline to measure the gas pressure, and the control terminal is respectively communicated with the air source and the intelligent sealing detection instrument; the control terminal is configured to execute the steps in the above-mentioned vehicle water system pipeline sealing detection method.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The present invention uses gas as a medium, combined with a pressure regulating device and an intelligent sealing detection instrument to perform a sealing detection on the water system. Vehicle information is collected through a code scanning device, and an adaptive detection program is automatically selected to improve detection efficiency and accuracy. The detection time is dynamically adjusted, and an adaptive inflation time control based on factors such as pressure and vehicle type is proposed. By monitoring the air pressure in the pipeline, combining historical data and real-time calculations, the inflation time parameters are dynamically optimized. Through the calculation of the basic inflation time, correction value and dynamic adjustment value, the precise control of the inflation process is comprehensively achieved. The above process can be realized automatically, which effectively improves the efficiency and accuracy of the sealing inspection of the vehicle pipeline.

[0017] The advantages of the present disclosure and the advantages of additional aspects will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present disclosure are used to provide a further understanding of the present disclosure. The exemplary embodiments of the present disclosure and the description thereof are used to explain the present disclosure but do not constitute a limitation of the present disclosure.

[0019] Figure 1 is a schematic diagram of the structure of the detection system of Example 1 of the present disclosure;

[0020] Figure 2 is a flow chart of the detection method of Embodiment 2 of the present disclosure;

[0021] Among them: 1. Air source, 2. Connecting pipelines, 3. Pressure regulating device, 4. Intelligent sealing detection instrument, 5. Code scanning equipment, 6. Sealing components, 7. Vehicle water system pipelines. DETAILED DESCRIPTION

[0022] The present disclosure is further described below in conjunction with the accompanying drawings and embodiments.

[0023] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present disclosure. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present disclosure belongs.

[0024] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof. It should be noted that, in the absence of conflict, the various embodiments in the present disclosure and the features in the embodiments can be combined with each other. The embodiments will be described in detail below in conjunction with the accompanying drawings.

[0025] Example 1

[0026] In the technical solutions disclosed in one or more embodiments, Figure 1 As shown, a sealing detection system for a pipeline of a vehicle water system includes: an air source 1, a pressure regulating device 3, an intelligent sealing detection instrument 4, a sealing component 6, a connecting pipeline 2 and a control terminal;

[0027] Gas source 1, the gas source package of the workshop power device can be used to provide a gas source for the detection device;

[0028] The pressure regulating device 3 may be a mechanical plunger pressure regulator, which is arranged on the connecting pipeline 2 and is used to adjust the pressure of the pipeline from the gas source 1 to the whole vehicle water system to ensure the safety of the pipeline;

[0029] The intelligent sealing test instrument 4 is equipped with a code scanning device 5 to automatically collect information of the vehicle to be tested; according to the collected vehicle information, a sealing judgment program corresponding to different vehicle models is selected to give the intimacy test result;

[0030] Specifically, different vehicle models have different sealing requirements, such as the test gas pressure holding time, pressure change speed, etc. By setting the sealing judgment program for different vehicle models, the sealing judgment result can be directly obtained.

[0031] Intelligent sealing test instrument 4, using pressure drop type intelligent analysis instrument, is used to detect and determine the sealing performance of the pipe joints of the vehicle water system;

[0032] The sealing component 6 is used to seal the terminal opening of the water system pipeline of the vehicle to be tested, such as the terminal opening of the expansion tank water filling port / exhaust port and the like. The sealing component 6 can be made of rubber material; the shape of the sealing component is adapted to the external dimensions of the expansion tank water filling port / exhaust port of different series to ensure the sealing and safety of the detection system device;

[0033] The connecting pipeline 2 may be a pressure-resistant nylon tube, forming an inflatable pipeline, which is used to connect the components of the detection device and the pipeline of the vehicle to be detected;

[0034] The control terminal is respectively connected to the air source 1, the pressure regulating device 3, and the intelligent sealing detection instrument 4 for communication, and is used to control the operation of the air source 1, the pressure regulating device 3, and the intelligent sealing detection instrument 4; the control terminal is used to control the sealing test process of the vehicle water system pipeline 7, including adaptively adjusting the sealing inflation time according to the vehicle model and the real-time detected pressure changes.

[0035] When the above system is used, the air source 1, the pressure regulating device 3, and the intelligent sealing detection instrument 4 are connected through the connecting pipe 2, and then connected to the pipeline to be tested on the vehicle, and the sealing component 6 is set at the open end of the pipeline to be tested; using the pressure test principle, when all water outlets of the vehicle water system are closed, the compressed air in the air source 1 is passed into the vehicle water system pipeline 7; according to the bus model, the inflation time is adaptively adjusted to inject a certain amount of compressed air into the pipeline to be tested; after maintaining the pressure for a period of time, the pressure change is monitored and recorded in real time through the intelligent sealing detection instrument 4; if the pressure drops by more than the preset threshold within the set time, it is judged that there is a leakage problem in this section of the pipeline; the specific fault location is located in combination with the physical position information of the bus water system pipe joint.

[0036] The inflation time is an important factor affecting the pressure saturation of the vehicle water system test. The inflation time of different vehicle models needs to be accurately controlled according to the volume of the water system of different vehicle models.

[0037] The control terminal is configured to adaptively adjust the inflation time of the sealing test according to the vehicle model and the real-time detected pressure change. The calculation formula is:

[0038] T=T BASE +α(P F -P0)-βΔR P And T <T MAX ;

[0039] Where, T is the inflation time; T BASEis the basic inflation time, is the set value; α and β are correction coefficients; T MAX is the maximum inflation time, which is the set value; P F is the set target pressure, P0 is the initial pressure;

[0040] ΔR P The difference in the pressure change rate in the pipeline within the set time interval Δt is calculated as follows;

[0041]

[0042] Δp t =p t -p t-Δt ;

[0043] Δp t-Δt =p t-Δt -p t-2Δt ;

[0044] Among them, p t is the pressure value detected at time t, p t-Δt is the pressure value detected at time t-Δt;

[0045] A further technical solution is to identify the model information of passenger cars, using barcode scanning technology, setting the information collection control program of the intelligent sealing detection instrument 4, and obtaining the identified model information based on the barcode vehicle model information. The value of α can be selected based on the model information.

[0046] Specifically, the pressure regulating device 3 adopts a mechanical plunger pressure regulator, which is used to adjust the air source 1 to the rated pressure of the vehicle water system; it has a reverse control function to prevent the compressed air from flowing in reverse.

[0047] In this embodiment, the pressure regulating device 3 adjusts the air source pressure to the rated pressure of the vehicle water system to avoid waste of resources caused by excessive pressure, and failure to achieve detection effect due to too low pressure, resulting in missed judgments; the reverse control function prevents the compressed air from flowing in reverse to avoid missed judgments. The intelligent sealing detection instrument 4 integrates a code scanning system to automatically select the test procedures for different models to avoid misjudgments and missed judgments caused by human factors, thereby improving detection efficiency and accuracy. Based on the control terminal, the inflation time is adaptively adjusted during the inflation stage to ensure the saturation of pipeline pressure and avoid wrong or missed judgments; the sealing component 6 is used to seal the water filling port / exhaust port of the expansion water tank to ensure the sealing effect of the pipe mouth and avoid missed judgments. By selecting the sealing structure of the connecting pipeline joint, the efficiency of the detection work is improved while ensuring the sealing performance.

[0048] Compared with the traditional manual visual inspection method of post-real vehicle road testing, this embodiment has higher efficiency and accuracy, and can effectively reduce the waste of resources and potential safety hazards caused by water leakage.

[0049] Example 2

[0050] Based on Example 1, a method for detecting the sealing performance of a pipeline of a vehicle water system is provided in this embodiment. The air source 1, the pressure regulating device 3, and the intelligent sealing detection instrument 4 are connected through the connecting pipeline 2, and then connected to the pipeline to be tested on the vehicle. This can be implemented in the control terminal, such as Figure 2 As shown, the following steps are included:

[0051] Step 1: Obtain relevant information of the vehicle to be tested, including vehicle information, pressure setting value and environmental parameters;

[0052] Step 2: Determine the basic inflation time and the maximum inflation time according to the vehicle model information and environmental parameters;

[0053] Step 3: Obtain an inflation time correction value according to the vehicle information and the pressure setting value after inflation;

[0054] Step 4, start the gas source 1 to inflate the pipeline of the water system of the vehicle to be tested. During the inflation process, obtain the gas pressure in the pipeline in real time, calculate the pressure change rate, and obtain the dynamic adjustment value of the inflation time according to the change of the pressure change rate;

[0055] Step 5: Update the inflation time in real time according to the basic inflation time, the inflation time correction value and the dynamic adjustment value of the inflation time, and control the inflation to stop based on the updated inflation time and the maximum inflation time.

[0056] In the process of measuring the sealing performance by inflation, if the sealing performance is not good and there are large leaks, it may not be easy to reach the required pressure value. If the inflation is stopped only based on whether the pressure is reached, the inflation time may be greatly prolonged, affecting the efficiency of the sealing test. If the sealing performance is good or the inflation pressure is high, the pipe is filled before the basic inflation time is reached. Continuous inflation will cause excessive pressure in the pipeline, affecting the performance of the pipeline to be tested.

[0057] In response to the above problems, in this embodiment, the inflation time is adjusted in real time based on the pressure change rate. By monitoring the air pressure in the pipeline, combining historical data and real-time calculation, the inflation time parameters are dynamically optimized. By calculating the basic inflation time, correction value and dynamic adjustment value, the inflation process is precisely controlled. At the same time, the maximum inflation time is set to avoid unlimited inflation extension due to leakage points.

[0058] In step 1, vehicle information is collected, specifically, using a code scanning device 5 or other identification methods to obtain the model, pipeline system capacity and related technical parameters of the current vehicle;

[0059] Environmental parameter collection, detection of external conditions such as ambient temperature and air pressure. Environmental factors may affect the stability of the monitored pressure and can guide the setting of pressure information;

[0060] Pressure information setting: according to the technical parameters of the vehicle model, set the target pressure value for detection, such as 0.3MPa, and record the specific setting value of the pressure regulating device;

[0061] In step 2, determine the basic inflation time T BASE , can be set based on experience or model data. The basic inflation time can be set to the approximate time required to fill a set proportion, which can be 80%. The maximum inflation time is the time that the corresponding vehicle model can be filled when the vehicle sealing meets the requirements.

[0062] Specifically, based on previous detection experience or model data, determine the basic detection time, for example, 5 minutes, as a default initial value; compare historical data and calibrate the basic detection time.

[0063] In step 3, the inflation time correction value is obtained according to the vehicle information and the pressure setting value after inflation. The calculation formula is:

[0064] T1=α(P F -P0);

[0065] Among them, P F is the set target pressure, P0 is the initial pressure; α correction coefficient is set according to different vehicle models;

[0066] In step 4, dynamically adjust according to pressure changes:

[0067] Step 41, collecting the pressure change curve in real time during the inflation process, and analyzing the rate of change of the pressure change rate;

[0068] If the pressure change rate tends to be stable in a short period of time and is close to the full state, the inflation time can be shortened;

[0069] If the pressure change rate is large or unstable, extend the inflation time to ensure pressure stability.

[0070] Step 42: dynamically calculate the required inflation time according to the pressure change rate and vehicle parameters, and the calculation formula is:

[0071] T3=βΔR P ;

[0072]

[0073] Δp t =p t -p t-Δt ;

[0074] Δp t-Δt =p t-Δt -p t-2Δt ;

[0075] Among them, p t is the pressure value detected at time t, p t-Δt is the pressure value detected at time t-Δt; p t-2Δt is the pressure value detected at time t-2Δt; ΔR P is the difference in the pressure change rate in the pipeline within the set time interval Δt;

[0076] In step 4, the method for updating the duration in real time is to recalculate the current pressure change rate every set time (for example, 30 seconds) during the inflation process, and update the inflation duration in real time. The updated duration calculation formula is:

[0077] T=T BASE +α(P F -P0)-βΔR P , and T <T MAX ;

[0078] Where, T is the inflation time; T BASE is the basic inflation time, is the set value; α and β are correction coefficients; T MAX is the maximum inflation time, which is the set value; P F is the set target pressure, P0 is the initial pressure;

[0079] In step 5, based on the updated inflation duration and the maximum inflation duration, the inflation is stopped. If the inflation duration updated in real time is reached within the maximum inflation duration, the inflation is stopped; if the inflation duration updated in real time is greater than the maximum inflation duration, the inflation is stopped at the time point of the maximum inflation duration.

[0080] A further technical solution is to perform a sealing test based on the intelligent sealing test instrument 4 after the inflation is completed, record the pressure change data in the pipeline, generate a curve of pressure change over time according to the pressure change in the pipeline, and obtain the sealing test result of the water pipeline of the vehicle to be tested.

[0081] Furthermore, during the sealing test, if the pressure stability reaches a set threshold, for example, the pressure drops below 0.01 MPa / minute), the sealing test is terminated in advance.

[0082] Take a certain model of bus as an example:

[0083] 1. The typical volume of the vehicle water system is 20 liters and the target pressure is 0.3MPa.

[0084] 2. The default basic detection time is 5 minutes.

[0085] 3. Monitor the pressure changes in real time. When the pressure drops from 0.3MPa to 0.28MPa, the pressure drop rate is 0.004MPa / minute. The system automatically determines that the sealing is good and adjusts the detection time to 4 minutes.

[0086] The following specific example illustrates the sealing detection process of the above detection system;

[0087] 1. Preparation:

[0088] Make sure the vehicle is stationary and the vehicle water system is assembled.

[0089] Remove the sealing cover of the water filling port / exhaust port of the expansion water tank of the water system of the vehicle to be tested, and install the sealing components of the water filling port / exhaust port of the expansion water tank;

[0090] Connect the pipeline of the vehicle to be tested to the detection system through the connecting pipeline 2, connect it to the air source 1 of the workshop power unit, and check and confirm that all connecting parts are securely connected.

[0091] 2. Inflation process:

[0092] Turn on the intelligent sealing test instrument, turn on the compressed air source switch, use the code scanning device to collect vehicle information, determine the vehicle model, automatically select the inflation program according to the scanned code information, slowly inject compressed air into the connecting pipeline of the detection device, determine the inflation time according to the above-mentioned sealing test method, inflate the pipeline of the vehicle to be tested, turn off the switch of the compressed air source 1 after the inflation is completed, and keep the connecting pipeline of the detection device in a closed state.

[0093] 3. Monitoring and recording:

[0094] The intelligent sealing testing instrument automatically selects the vehicle detection program according to the vehicle information collected by the scanning device, monitors the pressure changes in the pipeline in real time, and uses the instrument data acquisition system to record the pressure change curve over time.

[0095] The detection time was set to 5 minutes, during which the pressure changes were continuously monitored.

[0096] 4. Data analysis:

[0097] Analyze the pressure change curve to determine whether there is an obvious pressure drop.

[0098] If the pressure drops by more than a preset threshold (eg, 0.001 MPa) within a set time, it is determined that there is a leak in the pipeline section.

[0099] 5. Result processing:

[0100] Take appropriate repair measures based on the test results.

[0101] If no leakage is found, it can be assumed that the vehicle's water system pipes are well sealed.

[0102] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

[0103] Although the above describes the specific implementation methods of the present disclosure in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present disclosure. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present disclosure, various modifications or variations that can be made by those skilled in the art without creative work are still within the scope of protection of the present disclosure.

Claims

1. A method for detecting the sealing performance of a vehicle water system pipeline, characterized in that: The steps include: Obtaining relevant information of the vehicle to be tested, including vehicle information, pressure setting values, and environmental parameters; Determine the basic inflation time and the maximum inflation time according to the vehicle model information and environmental parameters; According to the vehicle information and the pressure setting value after inflation, the inflation time correction value is obtained; Start the gas source to inflate the pipeline of the water system of the vehicle to be tested. During the inflation process, obtain the gas pressure in the pipeline in real time, calculate the pressure change rate, and obtain the dynamic adjustment value of the inflation time according to the change of the pressure change rate; The inflation time is updated in real time according to the basic inflation time, the inflation time correction value and the dynamic adjustment value of the inflation time. The inflation is controlled based on the updated inflation time and the maximum inflation time. A sealing test is performed after the inflation is completed.

2. A method for detecting the sealing performance of a vehicle water system pipeline as claimed in claim 1, characterized in that: The basic inflation time is set to the approximate time used to fill the set proportion, and the maximum inflation time is the time it takes for the pipes of the vehicle's water system to be filled when the vehicle's sealing meets the requirements.

3. A method for detecting the sealing performance of a vehicle water system pipeline as claimed in claim 1, characterized in that: According to the vehicle information and the pressure setting value after inflation, the inflation time correction value is obtained, and the calculation formula is: T1=α(P F -P0) Among them, P F is the set target pressure, P0 is the initial pressure; α is the correction coefficient, which is set according to different vehicle models.

4. A method for detecting the sealing performance of a vehicle water system pipeline as claimed in claim 1, characterized in that: According to the change of pressure change rate, the dynamic adjustment value of inflation time is obtained, including: During the inflation process, the pressure change curve is collected in real time to analyze the rate of change of the pressure change rate; The inflation time is updated in real time based on the pressure change rate and vehicle parameters.

5. A method for detecting the sealing performance of a vehicle water system pipeline as claimed in claim 4, characterized in that: The method for updating the inflation duration in real time is as follows: during the inflation process, the current pressure change rate is recalculated at set intervals and the detection duration is updated; Alternatively, based on the updated inflation duration and the maximum inflation duration, the inflation is controlled to stop. If the inflation duration updated in real time is reached within the maximum inflation duration, inflation is stopped; if the inflation duration updated in real time is greater than the maximum inflation duration, inflation is stopped when the maximum inflation duration is reached.

6. A method for detecting the tightness of a vehicle water system pipeline as claimed in claim 1, characterized in that: After the inflation is completed, a sealing test is performed to record the pressure change data in the pipeline of the vehicle water system to be tested, and a pressure change curve over time is generated according to the pressure change in the pipeline to obtain the sealing test result of the vehicle water pipeline to be tested.

7. A method for detecting the sealing performance of a vehicle water system pipeline as claimed in claim 1, characterized in that: During the sealing test, if the pressure stability reaches the set threshold, the sealing test is terminated in advance.

8. A system for detecting the sealing performance of a pipeline in a vehicle water system, characterized in that: include: Gas source, intelligent sealing test instrument, connecting pipeline and control terminal; The air source is connected to the vehicle water system pipeline through a connecting pipeline to achieve inflation; an intelligent sealing detection instrument is arranged on the connecting pipeline to measure the gas pressure, and the control terminal is respectively communicated with the air source and the intelligent sealing detection instrument; the control terminal is configured to execute the steps in a vehicle water system pipeline sealing detection method as described in any one of claims 1-8.

9. A vehicle water system pipeline sealing detection system as claimed in claim 8, characterized in that: It also includes a pressure regulating device, which adopts a mechanical plunger pressure regulator and is arranged on the connecting pipeline.

10. A vehicle water system pipeline sealing detection system as claimed in claim 8, characterized in that: It also includes a sealing component for sealing the terminal pipe opening of the water system pipeline of the vehicle to be tested, and the terminal pipe opening includes a water filling port and an exhaust port of the expansion tank.

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