Ball valve seal monitoring method, system and terminal that integrates multi-sensor data

Abstract

This application relates to a method, system, and terminal for monitoring ball valve seals by integrating multi-sensor data, and pertains to the technical field of ball valve seal detection. The method includes acquiring a seal detection trigger signal for the ball valve; the seal detection trigger signal indicates that a conventional pressure decay detection is performed on the ball valve; determining an initial detection result based on the seal detection trigger signal; the initial detection result indicates the detection result after the conventional pressure decay detection of the ball valve; determining whether the initial detection result meets the preset requirement of a leak-free seal; if it does not meet the requirement, outputting the initial detection result as a prompt; if it does meet the requirement, determining the actual detection result according to a preset leakage amplification instruction and outputting a prompt; the leakage amplification instruction indicates that an amplified pressure decay detection is performed on the ball valve. This application has the effect of improving the efficiency of ball valve seal detection.

Description

Technical Field

[0001] This application relates to the technical field of ball valve seal detection, and in particular to a ball valve seal monitoring method, system and terminal that integrates multi-sensor data. Background Technology

[0002] A ball valve is a type of valve that uses a ball as its opening and closing element. Its core working principle is that the valve stem drives the internal ball to rotate around the ball's axis, thereby controlling the flow of fluid in the pipeline.

[0003] In related technologies, the sealing performance test of ball valves is a key step to ensure that they can reliably cut off fluid and prevent leakage in pipeline systems. Currently, the pressure decay method is usually used to test the sealing performance of ball valves. After pressurizing and holding the ball valve, the pressure change of the ball valve is monitored by a pressure sensor over a period of time. If the pressure drop exceeds the allowable range, the ball valve is judged to be unqualified for sealing.

[0004] Regarding the aforementioned technologies, for large-volume ball valves, the pressure change caused by a small leak is minimal. The pressure change caused in a short period of time will be masked by the noise of the pressure sensor, and it will take a very long time for a larger pressure change to occur before it can be detected by the pressure sensor. This results in low sealing detection efficiency of the ball valve, and there is still room for improvement. Summary of the Invention

[0005] To improve the efficiency of ball valve sealing detection, this application provides a ball valve sealing monitoring method, system, and terminal that integrates data from multiple sensors.

[0006] Firstly, this application provides a method for monitoring the seal of a ball valve by fusing data from multiple sensors, employing the following technical solution: A ball valve seal monitoring method that integrates multi-sensor data includes: Acquire the sealing detection trigger signal of the ball valve; the sealing detection trigger signal indicates that the ball valve is subjected to routine pressure decay detection; The initial detection result is determined based on the seal detection trigger signal; the initial detection result represents the detection result after performing a routine pressure decay test on the ball valve. Determine whether the initial test results meet the preset requirements for a leak-free seal; If it does not meet the requirements, the initial detection result will be output as a prompt; If the conditions are met, the actual detection result is determined according to the preset leakage amplification instruction and a prompt is output; the leakage amplification instruction indicates that the ball valve is subjected to amplified pressure attenuation detection.

[0007] Optionally, the steps of determining the actual detection result and outputting a prompt based on the preset leakage amplification command include: The preprocessing signal is determined according to the leakage amplification instruction; the preprocessing signal indicates that the ball valve, after completing the normal pressure decay, will be sealed into the preset vacuum chamber; Real-time pressure of the ball valve is obtained based on preprocessed signals; The real-time pressure of the ball valve is analyzed to generate the vacuum chamber setting pressure; the vacuum chamber setting pressure characterizes the real-time pressure adjustment of the vacuum chamber. Determine the ball valve pressure attenuation value based on the vacuum chamber set pressure; Determine whether the pressure decay value of the ball valve meets the preset leakage pressure decay threshold requirement; If the result is satisfactory, the preset sealing qualification result will be determined as the actual test result and a prompt will be output. If the result does not meet the requirements, the preset micro-leakage result will be taken as the actual test result and a prompt will be output.

[0008] Optionally, the step of analyzing the real-time pressure of the ball valve to generate the vacuum chamber set pressure includes: The effectiveness of the seal is determined based on the real-time pressure of the ball valve. The real-time temperature of the ball valve is obtained based on the effective sealing results; The internal and external pressure difference variables are determined based on the real-time pressure of the ball valve and the preset pressure optimization variables. Substitute the internal and external pressure difference variables and the real-time temperature of the ball valve into the preset detection time model to generate detection time optimization variables; Substitute the internal and external pressure difference variables into the preset structural stress model to generate structural stress optimization variables; Substitute the pressure optimization variables into the preset vacuum energy consumption model to generate vacuum energy consumption optimization variables; The detection time optimization variable, structural stress optimization variable, and vacuum energy consumption optimization variable are weighted and summed according to the preset optimization weight coefficients to generate multi-objective optimization variables; The minimum solution is found for the multi-objective optimization variables to determine the vacuum chamber setting pressure.

[0009] Optionally, the expression for the detection time model is: , ; In the formula, The preset detection time variable, The preset ball valve volume, The preset leakage pressure attenuation threshold, The preset standard temperature, The preset standard pressure, This refers to the real-time temperature of the ball valve. For the preset leakage equivalent flow conduction, The internal and external pressure difference is the variable. To optimize variables for detection time, The preset minimum detection time, The preset maximum detection time; The expression for the structural stress model is: ; In the formula, For structural stress optimization variables, The preset ball valve stress coefficient, This represents the upper limit of stress on the ball valve. The expression for the vacuum energy consumption model is: , ; In the formula, For preset real-time energy consumption variables, The preset energy consumption coefficient, Optimize variables for stress. The preset vacuum pumping speed, The preset minimum energy consumption, This is the preset maximum energy consumption.

[0010] Optionally, the steps for determining the effective sealing result based on the real-time pressure of the ball valve include: Obtain the initial pressure of the ball valve; Calculate the difference between the initial pressure of the ball valve and the real-time pressure of the ball valve to generate the ball valve pressure change value; Determine whether the pressure change value of the ball valve meets the preset threshold for seal failure. If the conditions are met, a re-detection trigger signal is obtained; the re-detection trigger signal indicates that the ball valve is re-performed with routine pressure decay detection. If it does not meet the requirements, output a valid seal result.

[0011] Optionally, the step of minimizing the multi-objective optimization variables to determine the vacuum chamber set pressure includes: The allowable pressure boundary of the structure is determined based on the real-time pressure of the ball valve and the preset maximum pressure difference. The allowable pressure boundary for the flow state is determined based on the real-time pressure of the ball valve, the preset critical pressure ratio, and the preset standard pressure. The associated structure allows for pressure boundaries, flow state allowable pressure boundaries, and preset vacuum limit pressure boundaries to generate optimized pressure boundaries; The minimum solution for the multi-objective optimization variables is obtained by optimizing the pressure boundary to determine the set pressure of the vacuum chamber.

[0012] Optionally, the step of determining the ball valve pressure attenuation value based on the vacuum chamber set pressure includes: The ball valve detection temperature and ball valve detection pressure are obtained based on the pressure set in the vacuum chamber. The ball valve detection pressure is corrected based on the ball valve detection temperature to generate the actual ball valve pressure; Obtain the initial pressure of the ball valve; Calculate the difference between the initial pressure and the actual pressure of the ball valve to generate the ball valve pressure decay value.

[0013] Optionally, the step of correcting the ball valve detection pressure based on the ball valve detection temperature to generate the actual ball valve pressure includes: Obtain the initial temperature of the ball valve; The pressure correction factor is determined based on the initial temperature and the detected temperature of the ball valve. The ball valve's detected pressure is corrected based on a pressure correction factor to generate the actual ball valve pressure.

[0014] Secondly, this application provides a ball valve sealing monitoring system that integrates data from multiple sensors, employing the following technical solution: A ball valve seal monitoring system that integrates data from multiple sensors includes: The acquisition module is used to acquire the seal detection trigger signal; A memory for storing a program for a ball valve seal monitoring method that integrates multi-sensor data as described in any of the preceding claims; The processor and the program in the memory can be loaded and executed by the processor to implement the ball valve seal monitoring method that integrates multi-sensor data as described in any of the above.

[0015] Thirdly, this application provides a smart terminal, which adopts the following technical solution: A smart terminal includes a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and execute a ball valve sealing monitoring method that integrates multi-sensor data as described in any of the preceding claims.

[0016] In summary, this application includes at least one of the following beneficial technical effects: 1. If the initial test results meet the requirements for a leak-free seal, it indicates that the ball valve may not be leaking. However, the pressure change caused by the micro-leakage is extremely small, and the pressure change caused in a short time is covered by the noise of the pressure sensor. Therefore, according to the leakage amplification command, the ball valve is subjected to amplified pressure attenuation detection to accelerate the speed of possible micro-leakage in the ball valve. This allows the pressure change caused by the micro-leakage to be detected by the pressure sensor in a shorter time, thereby obtaining the actual test results and improving the sealing test efficiency of the ball valve. 2. By sealing the ball valve, after completing the normal pressure decay, into the vacuum chamber according to the preprocessed signal, and then adjusting the real-time pressure of the vacuum chamber according to the set pressure of the vacuum chamber, a pressure difference is formed between the vacuum chamber and the inside of the ball valve, which promotes the speed of pressure change through the ball valve through small leaks, thereby improving the sealing detection efficiency of the ball valve.

[0017] 3. By optimizing the weighting coefficients, the detection time optimization variable, structural stress optimization variable, and vacuum energy consumption optimization variable are weighted and summed to obtain multi-objective optimization variables. Then, the minimum solution of the multi-objective optimization variables is obtained according to the optimization pressure boundary to determine the vacuum chamber setting pressure, ensuring the accuracy and effectiveness of the vacuum chamber setting pressure. Attached Figure Description

[0018] Figure 1 This is a flowchart of the ball valve sealing monitoring method that integrates multi-sensor data in the embodiments of this application.

[0019] Figure 2 This is a flowchart illustrating the steps in this application embodiment to determine the actual detection result and output a prompt based on a preset leakage amplification instruction.

[0020] Figure 3 This is a flowchart of the steps in this application embodiment to analyze the real-time pressure of the ball valve to generate the vacuum chamber setting pressure.

[0021] Figure 4 This is a flowchart of the steps for determining the effective sealing result based on the real-time pressure of the ball valve in the embodiments of this application.

[0022] Figure 5 This is a flowchart of the steps in this application embodiment to find the minimum solution of multi-objective optimization variables in order to determine the vacuum chamber setting pressure.

[0023] Figure 6 This is a flowchart of the steps for determining the ball valve pressure attenuation value based on the vacuum chamber setting pressure in the embodiments of this application.

[0024] Figure 7 This is a flowchart of the steps in this application embodiment to correct the ball valve detection pressure based on the ball valve detection temperature to generate the actual ball valve pressure. Detailed Implementation

[0025] To make the purpose, technical solution, and advantages of this application clearer, the following description is provided in conjunction with the appendix. Figures 1 to 7 The present application will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the application.

[0026] Reference Figure 1 This application discloses a ball valve seal monitoring method that integrates data from multiple sensors, including the following steps: Step S100: Obtain the sealing detection trigger signal of the ball valve.

[0027] The sealing detection trigger signal is the signal that initiates the sealing test on the ball valve. After preprocessing and self-checking the ball valve and detection device, it is input by the operator into the processing server. This signal indicates that a routine pressure decay test is being performed on the ball valve. The preprocessing and self-checking are to eliminate the influence of objective factors on the ball valve sealing test. The specific process includes: cleaning and drying the ball valve to remove oil, moisture, and solid impurities from inside the valve, preventing the gas from being adsorbed by oil, moisture, and solid impurities during the ball valve's internal inflation process, or the gas from these impurities from being desorbed, causing unstable internal pressure and misjudging the sealing test; then adjusting the cleaned ball valve... The valve is then fully closed to meet the requirements for sealing testing. The ball valve is then fixed to the mounting base in the vacuum chamber for easy follow-up sealing tests, including standard sealing tests followed by amplified sealing tests. Next, the testing device, including the pressurization line, pressure sensor, temperature sensor, vacuum chamber, and vacuum unit, undergoes a self-test for airtightness. Only one interface is left untested, and the device is filled with the rated pressure. After a set time, the pressure change is confirmed to be within the threshold value, indicating no leakage. The testing device is then synchronized in terms of time and sampling frequency to ensure data accuracy. Finally, the pressurization line is connected to the ball valve. The vacuum chamber is now in standby mode, ready for standard pressure decay testing.

[0028] The testing device is used to test the sealing performance of ball valves. It consists of two parts: conventional testing and amplified testing. Conventional testing requires a pressurized pipeline connected to the gas chamber to be connected to the only test interface of the ball valve. The pressurized pipeline extracts the test medium from the gas chamber and then fills the ball valve with the test medium at a set pressure. Dry gas is preferred as the test medium. At this time, the pressure sensor detects the pressure inside the ball valve, and the ball valve's airtightness is judged after determining the pressure attenuation value. Amplified testing requires a vacuum chamber and a vacuum unit residue. The vacuum chamber is closed to isolate the ball valve from the external environment. The vacuum unit extracts the gas in the vacuum chamber to change the pressure inside the vacuum chamber, thereby creating a pressure difference between the inside and outside of the ball valve. If there is a small leak in the ball valve, the pressure difference can accelerate the rate of the small leak and improve the efficiency of the pressure sensor in detecting pressure changes.

[0029] Step S101: Determine the initial detection result based on the seal detection trigger signal.

[0030] In one embodiment, after receiving a seal detection trigger signal, the processing server responds to the signal by generating control commands based on the pressure and time input by the operator. These commands are then transmitted wirelessly or via wired communication to the pressurization pipeline and pressure sensor. Upon receiving the pressure, the pressurization pipeline begins pressurizing the ball valve at a rated speed. The pressure sensor continuously monitors the pressure within the ball valve and transmits this information to the processing server. Once the processing server determines that the detected pressure equals the set pressure, it sends a stop command to the pressurization pipeline. At this point, the isolation valve on the pressurization pipeline closes to prevent leakage from the ball valve. During the detection period, the pressure sensor continues to monitor the pressure and transmit this information to the processing server. The processing server calculates the difference between the detected pressure and the set pressure, which is the pressure attenuation value. The initial detection result is determined by comparing the pressure attenuation value with an attenuation threshold. In another embodiment, the processing server directly looks up the corresponding detection pressure and time for the current ball valve in a mapping table between the ball valve and the detection pressure and time, based on the ball valve model. This process is then repeated to determine the initial detection result.

[0031] The initial test results are those obtained after performing routine pressure decay testing on the ball valve. The specific process will not be detailed here. The initial test results include two types: leaking and leak-free. After performing routine pressure decay, the pressure decay value can be determined. If the pressure decay value does not exceed the pressure decay threshold, it can be determined that the ball valve is not leaking, but it cannot be ruled out that there may be a small leak masked by the pressure sensor noise. If the pressure decay value exceeds the pressure decay threshold, it can be determined that the ball valve is leaking. Thus, some ball valves with more obvious leaks can be eliminated through routine pressure decay.

[0032] Step S102: Determine whether the initial test results meet the preset requirements for a leak-free seal.

[0033] Among them, the "no leakage" result means that the ball valve has no leakage as determined by the routine sealing test, and the requirement for the "no leakage" result is that it is consistent with the "no leakage" result.

[0034] After the processing server determines the initial test results, it judges whether the initial test results are consistent with the no-leakage seal result, thereby determining whether it is necessary to perform a magnified seal test on the ball valve.

[0035] Step S1021: If it does not meet the requirements, output the initial detection result and provide a prompt.

[0036] If the processing server determines that the initial test result is inconsistent with the leak-free sealing result, it indicates that the conventional pressure decay test of the ball valve has confirmed that the ball valve is leaking and its airtightness is unqualified. Therefore, the initial test result is directly output as a prompt, which reduces the workload of airtightness testing and makes it convenient for operators to repair ball valves with unqualified sealing in a timely manner.

[0037] Step S1022: If the condition is met, the actual detection result is determined according to the preset leakage amplification instruction and a prompt is output.

[0038] If the processing server determines that the initial test result is consistent with the no-leakage result, it indicates that the conventional pressure decay test can determine that the ball valve does not have obvious leakage. However, the ball valve may still have minor leakage. Therefore, according to the leakage amplification command, the ball valve is subjected to amplified pressure decay test, thereby increasing the leakage rate when the ball valve may have minor leakage. In this way, the actual test result is obtained and output as a prompt. On the one hand, it speeds up the rate of minor leakage on the ball valve and improves the efficiency of the ball valve's sealing test. On the other hand, it facilitates the operator to repair ball valves with unqualified sealing in a timely manner.

[0039] The leakage amplification command is an instruction to amplify the pressure decay detection of the ball valve. It is stored by the operator in the processing server. In one embodiment, the leakage amplification command serves as a prompt. When the processing server determines that the initial detection result is a leak-free seal, it automatically outputs the leakage amplification command to the display interface as a prompt. After seeing the command, the operator manually closes the vacuum chamber and, based on experience, controls the vacuum unit to evacuate air within the vacuum chamber to create a pressure difference, thereby accelerating any possible minor leaks on the ball valve. During this process, the pressure sensor continues to monitor the ball valve pressure in real time and sends it to the processing server. The processing server calculates the pressure decay value by comparing the initial pressure and the ball valve pressure difference, and then compares the pressure decay value with the decay threshold to determine the actual detection result. The advantage of this method is that it is convenient for detection and calculation. The first method has a lower leakage rate, but its drawback is that the operator's experience in controlling the vacuum chamber pressure cannot optimize the rate of even minor leaks. In another embodiment, a leakage amplification command is used as a control command. When the processing server determines that the initial detection result is a leak-free seal, it outputs a leakage amplification command to the vacuum chamber. The vacuum chamber automatically closes and seals the ball valve. After analysis and calculation, the optimal pressure is determined, and the vacuum unit is controlled to pump the pressure inside the vacuum chamber to the optimal pressure. During this process, the pressure sensor continues to monitor the ball valve pressure in real time and sends it to the processing server. The processing server calculates the pressure attenuation value based on the difference between the initial pressure and the ball valve pressure, and then compares the pressure attenuation value with the attenuation threshold to determine the actual detection result. The advantage of this method is that it ensures that the vacuum chamber pressure optimizes the rate of even minor leaks. The specific process is described in [reference needed]. Figure 2 The steps.

[0040] The actual test results are the sealing test results obtained after the ball valve undergoes amplified pressure attenuation testing. These results include two types: those with minor leakage and those without leakage. The processing server compares the pressure attenuation value obtained during the amplified pressure attenuation testing process with the attenuation threshold. If the pressure attenuation value is greater than the attenuation threshold, it is determined that the ball valve has minor leakage. If the pressure attenuation value is not greater than the attenuation threshold, it is determined that the ball valve does not have minor leakage.

[0041] Reference Figure 2 The steps for determining the actual detection result and outputting a prompt based on the preset leakage amplification command include: Step S200: Determine the preprocessed signal according to the leakage amplification instruction.

[0042] In this process, after the processing server is activated and sends the leakage amplification command to the processing terminal in the vacuum chamber, the processing terminal parses the leakage amplification command, thereby generating a preprocessing signal to control the vacuum chamber door to close, sealing the ball valve, which has completed the normal pressure decay, into the vacuum chamber. This isolates the ball valve from the external environment, making it easier to adjust the external pressure of the ball valve later, and creating a pressure difference between the inside and outside of the ball valve to accelerate the speed of minor leakage.

[0043] The preprocessing signal is the instruction to seal the ball valve, after the normal pressure decay, into the vacuum chamber. The processing terminal in the vacuum chamber decodes the leakage amplification instruction, and then selects the preprocessing signal corresponding to the leakage amplification instruction from the instruction library according to the decoded instruction. The preprocessing signal is then sent to the servo motor that controls the opening and closing of the vacuum chamber door. The servo motor receives and responds to the preprocessing signal, and rotates according to the corresponding direction and stroke, thereby controlling the vacuum chamber door to close and seal the ball valve, after the normal pressure decay, into the vacuum chamber.

[0044] Step S201: Obtain the real-time pressure of the ball valve based on the preprocessed signal.

[0045] In this process, after the servo motor in the vacuum chamber responds to the preprocessed signal and seals the ball valve in the vacuum chamber, the pressure sensor still detects the pressure inside the ball valve in real time to obtain the real-time pressure of the ball valve. On the one hand, this ensures whether the seal of the ball valve interface has failed during the sealing process. On the other hand, it is necessary to calculate the vacuum chamber pressure based on the real-time pressure of the ball valve so that the pressure difference inside and outside the ball valve can promote the speed of any possible minor leakage on the ball valve as quickly as possible.

[0046] The real-time pressure of the ball valve is the internal pressure of the ball valve after it is sealed in the vacuum chamber. After the vacuum chamber door is closed, the position sensor on the door sends the door closing signal to the processing server. The processing server receives and responds to the door closing signal by sending a pre-set detection signal to the pressure sensor, so that the pressure sensor continues to detect the pressure inside the ball valve and sends it to the processing server.

[0047] Step S202: Analyze the real-time pressure of the ball valve to generate the vacuum chamber setting pressure.

[0048] After determining the real-time pressure of the ball valve, the processing server analyzes this pressure to determine the optimal vacuum chamber setting pressure that maximizes the speed at which even the slightest leakage on the ball valve occurs, thus optimizing the pressure difference between the inside and outside of the ball valve. The specific analysis method is described in [reference needed]. Figure 3 The steps.

[0049] The vacuum chamber set pressure is the real-time adjusted pressure within the vacuum chamber. In one embodiment, the lower limit of the vacuum chamber pressure is used as the set pressure. This pressure ensures the fastest possible rate of minor leakage, but it does not consider the upper limit of the ball valve's stress tolerance or energy consumption limitations. In another embodiment, the pressure difference is obtained by analyzing the real-time pressure of the ball valve, ensuring that the internal and external pressure difference not only promotes minor leakage but also remains within the ball valve's tolerance range and energy consumption limits. Specific analysis methods are described below. Figure 3 The steps.

[0050] Step S203: Determine the ball valve pressure attenuation value based on the vacuum chamber setting pressure.

[0051] In this process, after determining the set pressure of the vacuum chamber, the processing server sends the set pressure to the processing terminal of the vacuum chamber. The processing terminal responds to the set pressure and controls the vacuum unit to extract the gas from the vacuum chamber at a rated speed. Meanwhile, the pressure sensor inside the vacuum chamber detects the pressure in real time and sends it to the processing terminal. Once the processing terminal determines that the detected pressure equals the set pressure of the vacuum chamber, it controls the vacuum unit to stop and seals the vacuum chamber. At this point, the pressure difference between the inside and outside of the ball valve reaches the optimal state for promoting minor leakage. The pressure attenuation value of the ball valve in this state is then detected and calculated to determine whether there is a minor leakage on the ball valve under the state of promoting faster minor leakage.

[0052] The ball valve pressure attenuation value is the pressure attenuation value obtained after amplifying and attenuating the ball valve pressure. For specific methods, please refer to [link / reference needed]. Figure 6 The steps.

[0053] Step S204: Determine whether the ball valve pressure attenuation value meets the preset leakage pressure attenuation threshold.

[0054] The leakage pressure attenuation threshold is the pressure attenuation value used to determine if a ball valve has a minor leak. The specific value is determined by the operator through amplified pressure attenuation testing on ball valves of the same model and batch that have minor leaks. The final pressure attenuation value of the ball valve is then determined as the leakage pressure attenuation threshold. The requirement for the leakage pressure attenuation threshold is that it should not exceed the leakage pressure attenuation threshold.

[0055] After determining the ball valve pressure decay value, the processing server checks whether the ball valve pressure decay value is not greater than the leakage pressure decay threshold, thereby determining whether there is a minor leakage in the ball valve.

[0056] Step S2041: If the result is satisfactory, the preset sealing qualification result will be determined as the actual test result and a prompt will be output.

[0057] If the processing server determines that the pressure decay value of the ball valve is not greater than the leakage pressure decay threshold, it indicates that even under the amplified pressure decay state, the pressure decay value of the ball valve is still small, and it can be determined that there is no minor leakage in the ball valve. Therefore, the sealing qualified result is determined as the actual test result and a prompt is output.

[0058] The sealing qualification result is the test result that the ball valve is properly sealed, and it is stored by the operator in the processing server.

[0059] Step S2042: If it does not meet the requirements, the preset micro-leakage result will be determined as the actual test result and a prompt will be output.

[0060] If the processing server determines that the ball valve pressure attenuation value is greater than the leakage pressure attenuation threshold, it indicates that under the amplified pressure attenuation state, the small leakage in the ball valve is accelerated, and the pressure attenuation value of the ball valve is large. Therefore, it is determined that there is a small leakage in the ball valve, and the sealing micro-leakage result is determined as the actual detection result and a prompt is output.

[0061] The micro-leakage seal result is the detection result of a minor leak in the ball valve, which is stored by the operator in the processing server.

[0062] Reference Figure 3 The steps for analyzing the real-time pressure of the ball valve to generate the vacuum chamber set pressure include: Step S300: Determine the effective sealing result based on the real-time pressure of the ball valve.

[0063] After the vacuum chamber is sealed, the pressure sensor sends the real-time pressure of the ball valve to the processing server. When the processing server determines the sealing effectiveness based on the real-time pressure of the ball valve, it can confirm that the seal of the ball valve interface is still effective and the real-time pressure of the ball valve is accurate. The vacuum chamber setting pressure can be determined based on the real-time pressure of the ball valve.

[0064] The effective sealing result refers to the analysis result that the ball valve interface seal is in an effective state. It is obtained by the processing server after real-time pressure analysis of the ball valve. For specific methods, please refer to [link / reference needed]. Figure 4 The steps.

[0065] Step S301: Obtain the real-time temperature of the ball valve based on the effective sealing result.

[0066] After the processing server determines that the seal is valid, it sends a detection command to the temperature sensor, which then detects the real-time temperature of the ball valve and sends the data to the processing server. This provides data support for analyzing the relationship between pressure decay rate and leakage rate based on the ideal gas law.

[0067] The real-time temperature of the ball valve is the temperature of the medium inside the ball valve, which is detected by a temperature sensor and sent to the processing server.

[0068] Step S302: Determine the internal and external pressure difference variable based on the real-time pressure of the ball valve and the preset pressure optimization variable.

[0069] Among them, the pressure optimization variable is the pressure set in the vacuum chamber for which specific values ​​are to be solved, which is a variable, and is used as... express.

[0070] The internal and external pressure difference variable is an expression for the internal and external pressure difference of the ball valve, expressed as the real-time pressure of the ball valve minus the pressure optimization variable. When the real-time pressure of the ball valve is constant, the smaller the pressure optimization variable, the larger the internal and external pressure difference variable, and the faster the leakage speed.

[0071] Step S303: Substitute the internal and external pressure difference variables and the real-time temperature of the ball valve into the preset detection time model to generate detection time optimization variables.

[0072] The detection time model is a model for calculating the shortest time required for the pressure inside the ball valve to decay to the threshold value. The specific expression is as follows: , .

[0073] In the formula, The preset detection time variable is an expression that includes the pressure optimization variable. When the detection time variable is minimized, the optimal value of the pressure optimization variable can be determined.

[0074] The preset ball valve volume is obtained by the operator through direct measurement or reading from the ball valve nameplate and stored in the processing server. The larger the ball valve volume, the slower the pressure decay rate and the longer the required detection time.

[0075] The preset leakage pressure attenuation threshold represents the minimum pressure attenuation value when a minor leak exists. The larger the leakage pressure attenuation threshold, the longer the detection time is required. The leakage pressure attenuation threshold is consistent with the leakage pressure attenuation threshold in step S204.

[0076] This refers to the real-time temperature of the ball valve. This refers to the preset standard temperature, taking the standard thermodynamic temperature as an example. The preset standard pressure is used as an example, with standard atmospheric pressure. The leakage rate is proportional to the pressure difference between the inside and outside. Standard temperature and standard pressure will convert the leakage rate from the standard state to the state corresponding to the real-time temperature and real-time pressure of the ball valve.

[0077] For the preset leakage equivalent flow conduction, The leakage rate is the product of the internal and external pressure difference and the leakage equivalent conductance. The leakage rate is determined by the difference between the internal and external pressure and the leakage rate. The difference between the two is calculated to obtain the leakage equivalent conductance. The larger the leakage rate, the faster the leakage speed and the less time is required.

[0078] The detection time variable is optimized by normalizing it, which facilitates subsequent optimization based on multiple objectives. The preset minimum detection time is the time it takes to determine if the ball valve is leaking when the pressure in the vacuum chamber is adjusted to the minimum pressure. The preset maximum detection time is used to record the time required to determine if the ball valve is leaking, with the pressure in the vacuum chamber set to standard atmospheric pressure.

[0079] The detection time optimization variable is the expression after the detection time is normalized. It is obtained by substituting the internal and external pressure difference variable and the real-time temperature of the ball valve into the detection time model. The pressure optimization variable is the only unknown in the expression. By optimizing the detection time optimization variable by finding the minimum solution, the optimal pressure optimization variable can be determined, that is, the optimal vacuum chamber setting pressure can be obtained.

[0080] Step S304: Substitute the internal and external pressure difference variables into the preset structural stress model to generate structural stress optimization variables.

[0081] The structural stress model is used to calculate the stress on the ball valve structure, and its specific expression is as follows: .

[0082] In the formula, For structural stress optimization variables, The preset ball valve stress coefficient, This represents the upper limit of stress on the ball valve.

[0083] The pressure difference between the inside and outside of a ball valve will cause membrane stress in the ball valve. This stress is linearly proportional to the pressure difference between the inside and outside, that is, the greater the pressure difference between the inside and outside, the greater the stress. The ball valve stress coefficient is the linear proportionality coefficient between the stress and the pressure difference between the inside and outside. The operator conducts an internal and external pressure difference test, records different internal and external pressure differences and corresponding pressures, plots the curve, and records the corresponding slope, which is the ball valve stress coefficient.

[0084] The upper limit of ball valve stress is the maximum stress that the ball valve can withstand. It is obtained by the operator through actual measurement on ball valves of the same batch, model and good condition. The upper limit of ball valve stress is used to normalize the stress generated by the internal and external pressure difference, which facilitates subsequent optimization based on multiple dimensions.

[0085] The structural stress optimization variable is a normalized expression for the stress on the ball valve under the internal and external pressure difference. It is obtained by substituting the internal and external pressure difference variable into the structural stress model. The pressure optimization variable is the only unknown in the expression. By optimizing the structural stress optimization variable by finding the minimum solution, the optimal pressure optimization variable can be determined, that is, the optimal vacuum chamber setting pressure can be obtained.

[0086] Step S305: Substitute the pressure optimization variables into the preset vacuum energy consumption model to generate vacuum energy consumption optimization variables.

[0087] The vacuum energy consumption model is a model for calculating the energy consumption required for the vacuum cavity to reach the set pressure. The specific expression is as follows: , .

[0088] In the formula, For preset real-time energy consumption variables, The preset energy consumption coefficient, Optimize variables for stress. The preset vacuum pumping speed, The preset minimum energy consumption, This is the preset maximum energy consumption.

[0089] The vacuum pumping speed is the rated pumping speed of the vacuum unit, which is a fixed value. The smaller the pressure optimization variable, the stronger the pumping capacity required. Therefore, the quotient of the vacuum pumping speed and the pressure optimization variable is the effective energy consumption. The product of the energy consumption coefficient and the quotient of the vacuum pumping speed and the pressure optimization variable converts the effective energy consumption into the actual energy consumption. Then, the real-time energy consumption variable is normalized using the minimum energy consumption and the maximum energy consumption, which facilitates subsequent optimization based on multiple dimensions.

[0090] The energy consumption coefficient is the ratio between the effective energy consumption and the total energy consumption of the vacuum unit, obtained by the operator from the vacuum unit's instruction manual. The minimum energy consumption is the lowest energy consumption of the vacuum unit, which is 0. The maximum energy consumption is the energy required for the vacuum unit to maintain the pressure within the vacuum chamber at the minimum necessary level for a given period of time, obtained through actual measurement by the operator.

[0091] The vacuum energy consumption optimization variable is the normalized expression of energy consumption when the vacuum unit pumps the vacuum chamber to the set pressure. It is obtained by substituting the pressure optimization variable into the vacuum energy consumption model and simplifying it. The pressure optimization variable is the only unknown in the expression. By finding the minimum solution of the vacuum energy consumption optimization variable, the optimal pressure optimization variable can be determined, that is, the optimal vacuum chamber set pressure can be obtained.

[0092] Step S306: The detection time optimization variable, structural stress optimization variable, and vacuum energy consumption optimization variable are weighted and summed according to the preset optimization weight coefficients to generate multi-objective optimization variables.

[0093] Among them, the optimization weight coefficients are the weights of the multi-dimensional objectives in the objective function. The detection time optimization variable determines the detection efficiency and is the core term, with a weight set to 0.5. The structural stress optimization variable determines the detection safety and is the secondary term, with a weight set to 0.3. The vacuum energy consumption optimization variable takes into account all aspects and has a weight set to 0.2.

[0094] The multi-objective optimization variables are multi-dimensional objective functions waiting to be solved. They are obtained by weighting and summing the detection time optimization variables, structural stress optimization variables, and vacuum energy consumption optimization variables according to the optimization weight coefficients. The multi-objective optimization variables contain only one unknown variable: the pressure optimization variable. By finding the minimum solution of the multi-objective optimization variables, the optimal pressure optimization variable can be determined.

[0095] Step S307: Find the minimum solution for the multi-objective optimization variables to determine the vacuum chamber setting pressure.

[0096] After determining the multi-objective optimization variables, the vacuum chamber setting pressure is determined by finding the minimum solution for these variables. The specific method is described in [reference needed]. Figure 5 This process ensures both testing efficiency and the structural stability and energy savings of the ball valve.

[0097] Reference Figure 4 The steps for determining the effective sealing result based on the real-time pressure of the ball valve include: Step S400: Obtain the initial pressure of the ball valve.

[0098] In determining whether the ball valve's interface seal is still effective, it is necessary to compare it with the pressure of the ball valve seal before the vacuum chamber. If the difference between the two is small, it can be determined that the ball valve's interface seal is still effective. If the difference is large, it can be determined that the interface has failed due to leakage. Therefore, the initial pressure of the ball valve is detected as a benchmark data for comparison to ensure the accuracy of the detection of the ball valve interface status.

[0099] The initial pressure of the ball valve is the pressure before the ball valve is sealed into the vacuum chamber. The pressure sensor detects the ball valve pressure and sends it to the processing server to await its use.

[0100] Step S401: Calculate the difference between the initial pressure of the ball valve and the real-time pressure of the ball valve to generate the ball valve pressure change value.

[0101] Among them, the ball valve pressure change value is the pressure change value of the ball valve before and after sealing into the vacuum chamber. It is obtained by the processing server calculating the difference between the initial pressure of the ball valve and the real-time pressure of the ball valve. The ball valve pressure change value is used to quantify the degree of pressure change of the ball valve and serve as the benchmark data for determining the state, so as to ensure the accuracy of the detection of the ball valve interface state.

[0102] Step S402: Determine whether the ball valve pressure change value meets the preset sealing failure change threshold.

[0103] Among them, the sealing failure change threshold is the minimum pressure change when the ball valve interface seal fails. It is obtained by the operator after actively releasing the interface seal. The requirement for the sealing failure change threshold is that it is not less than the sealing failure change threshold.

[0104] After the processing server determines the ball valve pressure change value, it judges whether the ball valve pressure change value is not less than the sealing failure change threshold, thereby determining whether the ball valve has experienced interface sealing failure before and after sealing into the vacuum chamber.

[0105] Step S4021: If the condition is met, obtain the re-detection trigger signal.

[0106] If the processing server determines that the ball valve pressure change value is not less than the sealing failure change threshold, it indicates that the pressure difference before and after the ball valve is sealed into the vacuum chamber is large, and the ball valve interface seal has failed. Therefore, the re-detection trigger signal is called to re-seal the ball valve interface and perform conventional pressure decay detection again. After passing the conventional pressure decay detection, the amplified pressure decay detection is performed again until it is determined that the ball valve pressure change value is less than the sealing failure change threshold.

[0107] The re-detection trigger signal is a signal for re-performing the routine pressure decay test on the ball valve. It is stored in the processing server by the operator. By using the re-detection trigger signal, the ball valve is pressurized and routinely tested again, eliminating objective factors that may cause changes in the ball valve pressure and ensuring the accuracy of the test.

[0108] Step S4022: If it does not meet the requirements, output the result of a valid seal.

[0109] If the processing server determines that the pressure change value of the ball valve is less than the sealing failure change threshold, it indicates that the pressure difference before and after the ball valve is sealed into the vacuum chamber is small, the ball valve interface seal is effective, and the amplified pressure attenuation detection can be performed. Therefore, the sealing effective result is output. The sealing effective result is the detection result of the ball valve interface seal being effective, which is stored in the processing server by the operator.

[0110] Reference Figure 5 The steps for minimizing the multi-objective optimization variables to determine the vacuum chamber set pressure include: Step S500: Determine the allowable pressure boundary of the structure based on the real-time pressure of the ball valve and the preset maximum pressure difference.

[0111] Among them, the maximum pressure difference is the maximum internal and external pressure difference that the ball valve can withstand, which is obtained by the operator through actual measurement on the same batch, model and brand new ball valves in good condition.

[0112] The structural allowable pressure boundary is the minimum allowable vacuum chamber pressure of the ball valve structure. It is obtained by the processing server calculating the difference between the real-time pressure and the maximum pressure difference of the ball valve. The structural allowable pressure boundary requires that the vacuum chamber pressure must not be less than the structural allowable pressure boundary, thereby ensuring the structural safety of the ball valve.

[0113] Step S501: Determine the allowable pressure boundary of the flow state based on the real-time pressure of the ball valve, the preset critical pressure ratio, and the preset standard pressure.

[0114] The critical pressure ratio is the critical pressure ratio of the medium inside the ball valve, which is determined by the gas adiabatic index of the medium. For example, air and nitrogen have an adiabatic index of 1.4 and a critical pressure ratio of 0.528. The standard pressure is the standard atmospheric pressure.

[0115] The allowable pressure boundary for flow conditions is the maximum vacuum chamber pressure that ensures effective vacuum pumping. The product of the ball valve's real-time pressure and the critical pressure ratio determines the vacuum chamber pressure at which the leakage rate is maximum. If the vacuum chamber pressure continues to decrease, the leakage rate will not increase. The minimum value between the maximum vacuum chamber pressure and the standard pressure is the allowable pressure boundary for flow conditions, ensuring that the vacuum chamber pressure is neither too low nor ineffective.

[0116] Step S502: Associate the structural allowable pressure boundary, the flow state allowable pressure boundary, and the preset vacuum limit pressure boundary to generate an optimized pressure boundary.

[0117] The vacuum limit pressure boundary is the minimum pressure that the vacuum chamber can reach, which is obtained by the operator by checking the nameplate of the vacuum unit.

[0118] The optimized pressure boundary is the vacuum chamber pressure boundary that ensures the safety of the ball valve structure, the limitations of equipment capacity, and the effectiveness of the vacuum chamber pressure. It is obtained by processing the allowable pressure boundary of the associated structure, the allowable pressure boundary of the flow state, and the vacuum limit pressure boundary.

[0119] Step S503: Find the minimum solution for the multi-objective optimization variables based on the optimized pressure boundary to determine the vacuum chamber setting pressure.

[0120] In this process, after determining the optimized pressure boundary, the processing server calculates the minimum solution for the multi-objective optimization variables based on the optimized pressure boundary and the gradient descent algorithm, ensuring that the calculated minimum value meets the requirements of the optimized pressure boundary, and thus determines the minimum value as the vacuum chamber set pressure.

[0121] Reference Figure 6 The steps for determining the ball valve pressure attenuation value based on the vacuum chamber setting pressure include: Step S600: Obtain the ball valve detection temperature and ball valve detection pressure based on the vacuum chamber setting pressure.

[0122] After determining the set pressure of the vacuum chamber, the vacuum unit adjusts the pressure inside the vacuum chamber to the set pressure. After a set pressure decay time, the ball valve detection temperature and ball valve detection pressure are detected to determine whether the small leaks that may exist on the ball valve aggravate the pressure change after the pressure difference is amplified.

[0123] The ball valve temperature detection is the temperature of the medium inside the ball valve. After the pressure decay time, the temperature sensor detects the temperature multiple times and calculates the average value, which is then sent to the processing server. The ball valve temperature detection is used to correct the ball valve pressure, eliminate the interference of temperature changes on the pressure, and ensure the accuracy of the pressure.

[0124] The ball valve detection pressure is the pressure of the medium inside the ball valve. After the pressure decay time, the pressure sensor detects the pressure multiple times and calculates the average value, which is then sent to the processing server. The ball valve detection pressure is used to compare with the initial value to determine the degree of pressure change. It serves as a benchmark value to determine whether the ball valve pressure decay is severe, ensuring the accuracy of whether there are minor leaks in the ball valve.

[0125] Step S601: Correct the ball valve detection pressure based on the ball valve detection temperature to generate the actual ball valve pressure.

[0126] The actual pressure of the ball valve is the pressure after eliminating the interference of medium temperature. It is obtained by the processing server after correcting the ball valve detection pressure based on the ball valve detection temperature. The specific method is as follows: Figure 7 The steps.

[0127] Step S602: Obtain the initial pressure of the ball valve.

[0128] The initial pressure of the ball valve in this step is the same as the initial pressure of the ball valve in step S400, which will not be elaborated here.

[0129] Step S603: Calculate the difference between the initial pressure of the ball valve and the actual pressure of the ball valve to generate the ball valve pressure decay value.

[0130] In this process, after determining the initial pressure and the actual pressure of the ball valve, the difference between the two is calculated to obtain the change in pressure inside the ball valve before and after the amplified pressure attenuation, which is the ball valve pressure attenuation value.

[0131] Reference Figure 7 The steps for correcting the ball valve's detected pressure based on its detected temperature to generate the actual ball valve pressure include: Step S700: Obtain the initial temperature of the ball valve.

[0132] The initial temperature of the ball valve is the initial temperature at which the medium enters the ball valve, which is detected by a temperature sensor and sent to the processing server.

[0133] Step S701: Determine the pressure correction coefficient based on the initial temperature of the ball valve and the detected temperature of the ball valve.

[0134] The pressure correction coefficient is the degree of correction for the ball valve pressure based on temperature changes, and is obtained by the processing server by calculating the quotient of the ball valve's initial temperature and the ball valve's detected temperature.

[0135] Step S702: Correct the ball valve detection pressure according to the pressure correction coefficient to generate the actual ball valve pressure.

[0136] After determining the pressure correction coefficient, the product of the pressure correction coefficient and the ball valve detection pressure is calculated to eliminate the interference of temperature changes on the pressure and obtain the actual pressure of the ball valve.

[0137] Based on the same inventive concept, embodiments of this application provide a ball valve sealing monitoring system that integrates data from multiple sensors, including: The acquisition module is used to acquire the sealing detection trigger signal, real-time ball valve pressure, real-time ball valve temperature, ball valve initial pressure, re-detection trigger signal, ball valve detection temperature, ball valve detection pressure, and ball valve initial temperature. A memory for storing the program of a ball valve seal monitoring method that integrates multi-sensor data; The processor and memory can load and execute programs to implement a ball valve seal monitoring method that integrates data from multiple sensors.

[0138] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device, and unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0139] This application provides a computer-readable storage medium storing a computer program that can be loaded by a processor and executed as a method for monitoring the sealing of a ball valve by fusing multi-sensor data.

[0140] Computer storage media include, for example, USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, optical disks, and other media that can store program code.

[0141] Based on the same inventive concept, this application provides a smart terminal, including a memory and a processor. The memory stores a computer program that can be loaded by the processor and executed to perform a ball valve sealing monitoring method that fuses multi-sensor data.

[0142] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device, and unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0143] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Any feature disclosed in this specification (including the abstract and drawings) may be replaced by other equivalent or similar features unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is only one example of a series of equivalent or similar features.

Claims

1. A method for monitoring the sealing of a ball valve by integrating data from multiple sensors, characterized in that, include: Acquire the sealing detection trigger signal of the ball valve; The sealing detection trigger signal indicates that the ball valve is subjected to routine pressure attenuation detection. The initial detection result is determined based on the seal detection trigger signal; The initial test results characterize the test results after performing conventional pressure attenuation testing on the ball valve. Determine whether the initial test results meet the preset requirements for a leak-free seal; If it does not meet the requirements, the initial detection result will be output as a prompt; If the conditions are met, the actual detection result is determined according to the preset leakage amplification instruction and a prompt is output; the leakage amplification instruction indicates that the ball valve is subjected to amplified pressure attenuation detection.

2. The ball valve sealing monitoring method according to claim 1, characterized in that, The steps for determining the actual detection result and outputting a prompt based on the preset leakage amplification command include: The preprocessing signal is determined according to the leakage amplification instruction; the preprocessing signal indicates that the ball valve, after completing the normal pressure decay, will be sealed into the preset vacuum chamber; Real-time pressure of the ball valve is obtained based on preprocessed signals; The real-time pressure of the ball valve is analyzed to generate the vacuum chamber setting pressure; the vacuum chamber setting pressure characterizes the real-time pressure adjustment of the vacuum chamber. Determine the ball valve pressure attenuation value based on the vacuum chamber set pressure; Determine whether the pressure decay value of the ball valve meets the preset leakage pressure decay threshold requirement; If the result is satisfactory, the preset sealing qualification result will be determined as the actual test result and a prompt will be output. If the result does not meet the requirements, the preset micro-leakage result will be taken as the actual test result and a prompt will be output.

3. The ball valve sealing monitoring method based on multi-sensor data according to claim 2, characterized in that, The steps for analyzing the real-time pressure of the ball valve to generate the vacuum chamber set pressure include: The effectiveness of the seal is determined based on the real-time pressure of the ball valve. The real-time temperature of the ball valve is obtained based on the effective sealing results; The internal and external pressure difference variables are determined based on the real-time pressure of the ball valve and the preset pressure optimization variables. Substitute the internal and external pressure difference variables and the real-time temperature of the ball valve into the preset detection time model to generate detection time optimization variables; Substitute the internal and external pressure difference variables into the preset structural stress model to generate structural stress optimization variables; Substitute the pressure optimization variables into the preset vacuum energy consumption model to generate vacuum energy consumption optimization variables; The detection time optimization variable, structural stress optimization variable, and vacuum energy consumption optimization variable are weighted and summed according to the preset optimization weight coefficients to generate multi-objective optimization variables; The minimum solution is found for the multi-objective optimization variables to determine the vacuum chamber setting pressure.

4. The ball valve sealing monitoring method based on multi-sensor data according to claim 3, characterized in that, The expression for the detection time model is: ， ； In the formula, The preset detection time variable, The preset ball valve volume, The preset leakage pressure attenuation threshold, The preset standard temperature, The preset standard pressure, This refers to the real-time temperature of the ball valve. For the preset leakage equivalent flow conduction, The internal and external pressure difference is the variable. To optimize variables for detection time, The preset minimum detection time, The preset maximum detection time; The expression for the structural stress model is: ； In the formula, For structural stress optimization variables, The preset ball valve stress coefficient, This represents the upper limit of stress on the ball valve. The expression for the vacuum energy consumption model is: ， ； In the formula, For preset real-time energy consumption variables, The preset energy consumption coefficient, Optimize variables for stress. The preset vacuum pumping speed, The preset minimum energy consumption, This is the preset maximum energy consumption.

5. The ball valve sealing monitoring method based on multi-sensor data according to claim 3, characterized in that, The steps for determining the effective sealing result based on the real-time pressure of the ball valve include: Obtain the initial pressure of the ball valve; Calculate the difference between the initial pressure of the ball valve and the real-time pressure of the ball valve to generate the ball valve pressure change value; Determine whether the pressure change value of the ball valve meets the preset threshold for seal failure. If the conditions are met, a re-detection trigger signal is obtained; the re-detection trigger signal indicates that the ball valve is re-performed with routine pressure decay detection. If it does not meet the requirements, output a valid seal result.

6. The ball valve sealing monitoring method based on multi-sensor data according to claim 3, characterized in that, The steps for minimizing the multi-objective optimization variables to determine the vacuum chamber set pressure include: The allowable pressure boundary of the structure is determined based on the real-time pressure of the ball valve and the preset maximum pressure difference. The allowable pressure boundary for the flow state is determined based on the real-time pressure of the ball valve, the preset critical pressure ratio, and the preset standard pressure. The associated structure allows for pressure boundaries, flow state allowable pressure boundaries, and preset vacuum limit pressure boundaries to generate optimized pressure boundaries; The minimum solution for the multi-objective optimization variables is obtained by optimizing the pressure boundary to determine the set pressure of the vacuum chamber.

7. The ball valve sealing monitoring method according to claim 2, characterized in that, The steps for determining the ball valve pressure attenuation value based on the vacuum chamber set pressure include: The ball valve detection temperature and ball valve detection pressure are obtained based on the pressure set in the vacuum chamber. The ball valve detection pressure is corrected based on the ball valve detection temperature to generate the actual ball valve pressure; Obtain the initial pressure of the ball valve; Calculate the difference between the initial pressure and the actual pressure of the ball valve to generate the ball valve pressure decay value.

8. The ball valve sealing monitoring method according to claim 7, characterized in that, The steps for correcting the ball valve's detected pressure based on the ball valve's detected temperature to generate the actual ball valve pressure include: Obtain the initial temperature of the ball valve; The pressure correction factor is determined based on the initial temperature and the detected temperature of the ball valve. The ball valve's detected pressure is corrected based on a pressure correction factor to generate the actual ball valve pressure.

9. A ball valve sealing monitoring system integrating multi-sensor data, characterized in that, include: The acquisition module is used to acquire the seal detection trigger signal; A memory for storing the program of the ball valve seal monitoring method for fusing multi-sensor data as described in any one of claims 1 to 8; The processor and the program in the memory can be loaded and executed by the processor to implement the ball valve sealing monitoring method that integrates multi-sensor data as described in any one of claims 1 to 8.

10. A smart terminal, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executed as described in any one of claims 1 to 8 for monitoring the ball valve seal by fusing multi-sensor data.

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