Airtight system pressure balance analysis method, device and equipment and storage medium

Abstract

The invention discloses an airtight system pressure balance analysis method, device and equipment and a storage medium, and the method comprises the steps: obtaining the actual pressure difference through obtaining the actual internal pressure and the actual external pressure of an airtight system after the airtight system operates for a first preset time, and obtaining the pressure balance of the airtight system according to the actual pressure difference and the volume of the airtight system; by means of the built internal and external pressure difference fitting function and the built internal and external pressure difference derivative function, the gas particle loss amount of the airtight system after the airtight system operates for a second preset time is calculated; according to the gas particle loss amount, the current internal air pressure of the airtight system after the airtight system runs for a second preset time is obtained, the circulation process is executed according to the current internal air pressure and the current external air pressure until the preset number of cycles is reached, circulation is stopped, and the current internal air pressure obtained in each cycle is stored; and executing a cycle process according to the current internal air pressure until a preset cycle index is reached, obtaining a plurality of current internal air pressures, and performing fitting analysis. The estimation result of the internal air pressure of the airtight system obtained through the method is more accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of airtight system pressure balance analysis, and in particular to an airtight system pressure balance analysis method, device, equipment and storage medium. Background Art

[0002] When battery packs and sealed storage boxes are transported by air or by car and pass through different altitudes, the air pressure inside and outside the boxes will be different and will gradually change. During the balancing process, the peak pressure must not exceed the allowable pressure of the structure. In current engineering applications, the gas state equation is generally used to evaluate the equivalent gas volume loss or absorption rate corresponding to the pressure difference inside and outside the system per unit time to demonstrate the rationality of the pressure valve selection.

[0003] However, in actual engineering scenarios, air pressure is closely related to transportation, operation mode, and time factors. The general analysis and design methods have the following problems: the core component of the breather valve has a nonlinear relationship between pressure and flow rate in the differential pressure mode, and the factors in the air pressure change process such as time, speed, gas loss, etc. are over-estimated on average, resulting in insufficient analysis accuracy; the balancing valve permeability parameters determined by the analysis and selection are seriously amplified, reducing system reliability and increasing costs; the pressure of the confined space under the working conditions cannot be quantitatively evaluated, and thus it is impossible to accurately quantify whether the air pressure state allowed by the closed system is achieved; and the analysis process is a reverse adaptation analysis, and the target process cannot be forward analyzed. Summary of the invention

[0004] In order to solve the above technical problems, an embodiment of the present invention provides an airtight system pressure balance analysis method, device, equipment and storage medium to solve the technical problem of low analysis accuracy in the conventional pressure balance analysis method when performing pressure balance analysis on a complex airtight system.

[0005] A first aspect of an embodiment of the present invention provides a method, the method comprising:

[0006] Acquire the actual internal air pressure and the actual external air pressure of the airtight system after the airtight system runs for a first preset time;

[0007] Based on the actual internal air pressure and the actual external air pressure, the actual pressure difference is obtained, and according to the actual pressure difference and the volume of the airtight system, the gas particle loss of the airtight system after running for a second preset time is calculated by using the constructed internal and external pressure difference fitting function and the internal and external pressure difference derivative function;

[0008] According to the amount of gas particle loss, the current internal air pressure of the airtight system after the second preset time is obtained, the current internal air pressure is stored, and the current external air pressure is obtained based on the current internal air pressure and the position of the airtight system, and a cycle process is performed according to the current internal air pressure and the current external air pressure until a preset number of cycles is reached, and the cycle is stopped and the current internal air pressure obtained in each cycle is stored;

[0009] A fitting analysis is performed on the stored multiple current internal air pressures to obtain the maximum or minimum value of the internal air pressure of the airtight system and the time corresponding to the maximum or minimum value.

[0010] In a possible implementation of the first aspect, the actual pressure difference is input into the internal and external pressure difference fitting function for calculation to obtain the actual time;

[0011] The particle passing rate is obtained according to the actual time, the derivative of the internal and external pressure difference and the volume of the airtight system;

[0012] According to the particle passing rate, the gas particle loss amount of the airtight system after running for the second preset time is calculated, wherein the expression of the gas particle loss amount is:

[0013] ΔN fit =Δt*K fit

[0014] Where, ΔN fit is the gas particle loss, K fit is the particle passing rate, and Δt is the difference between the second preset operation time and the first preset operation time of the airtight system.

[0015] In a possible implementation manner of the first aspect, the internal and external pressure difference fitting function and the internal and external pressure difference derivative function are obtained by testing the airtight system, including:

[0016] Acquire the air permeable area of ​​the air permeable element, and acquire internal air pressure test data and external air pressure test data of an airtight system connected to the air permeable element at multiple preset moments;

[0017] Based on the internal air pressure test data and the external air pressure test data, the test pressure difference at each preset time is obtained, and a fitting calculation is performed according to the test pressure difference at each preset time to obtain an internal and external pressure difference fitting function;

[0018] The internal and external pressure difference fitting function is differentiated to obtain the internal and external pressure difference derivative function.

[0019] In a possible implementation of the first aspect, obtaining internal air pressure test data and external air pressure test data of an airtight system connected to the air permeable element at a plurality of preset moments includes:

[0020] Inputting gas into the airtight system and stopping the inputting of gas after the internal air pressure of the airtight system reaches a first preset air pressure value;

[0021] The internal air pressure test data and external air pressure test data of the airtight system are recorded once after a preset time interval until the pressure difference between the internal air pressure and the external air pressure of the airtight system reaches a second preset air pressure value and then the recording is stopped to obtain the internal air pressure test data and external air pressure test data at each preset moment.

[0022] In a possible implementation of the first aspect, obtaining the current internal air pressure of the airtight system after running for a second preset time according to the gas particle loss includes:

[0023] Based on the gas state equation, a gas particle number change function of the airtight system after running for a second preset time is constructed according to the actual internal gas pressure;

[0024] After jointly calculating the gas particle loss amount and the gas particle number change function, the current internal air pressure of the airtight system after running for a second preset time is obtained, wherein the second preset time is greater than the first preset time.

[0025] In a possible implementation of the first aspect, based on the gas state equation, a gas particle number change function of the airtight system after running for a second preset time is constructed according to the actual internal gas pressure, including:

[0026] The actual internal gas pressure is input into the gas state equation to obtain the number of first gas particles, where the expression of the number of first gas particles is:

[0027]

[0028] Where N act,t is the number of first gas particles in the airtight system after the first preset time of operation, P it is the actual internal pressure, T t is the gas temperature of the airtight system after the first preset time of operation, R is the universal gas constant, V act The gas volume of the airtight system after the first preset operation time;

[0029] Based on the gas state equation, the gas particle number change function of the airtight system after running for the second preset time is constructed using the first gas particle number, wherein the expression of the gas particle number change function is:

[0030]

[0031] Where N act,t is the number of first gas particles in the airtight system after the first preset time of operation, P it+Δtis the internal air pressure of the airtight system after the second preset time of operation, T t+Δt is the gas temperature of the airtight system after the second preset time of operation, R is the universal gas constant, V act It is the gas volume of the airtight system after running for the second preset time.

[0032] In a possible implementation of the first aspect, executing a cycle process according to a current internal air pressure and a current external air pressure includes:

[0033] According to the current internal air pressure and the current external air pressure, the updated actual pressure difference is obtained;

[0034] According to the updated actual pressure difference and the volume of the airtight system, the new gas particle loss of the airtight system is calculated by using the constructed internal and external pressure difference fitting function and the internal and external pressure difference derivative function;

[0035] According to the amount of gas particle loss, a new current internal air pressure of the airtight system after the preset operation time is obtained, the new current internal air pressure is stored, and a new current external air pressure is obtained based on the new current internal air pressure and the position of the airtight system;

[0036] The new current internal air pressure is determined as the current internal air pressure, the new external air pressure is determined as the current external air pressure and stored, and then the updated actual pressure difference step is obtained according to the current internal air pressure and the current external air pressure.

[0037] In order to solve the same technical problem, a second aspect of an embodiment of the present invention provides a pressure balance analysis device for an airtight system, the device comprising:

[0038] An acquisition module, used for acquiring an actual internal air pressure and an actual external air pressure of the airtight system after the airtight system has been running for a first preset time;

[0039] A first calculation module is used to obtain an actual pressure difference based on an actual internal air pressure and an actual external air pressure, and calculate the gas particle loss of the airtight system after running for a second preset time by using a constructed internal and external pressure difference fitting function and an internal and external pressure difference derivative function according to the actual pressure difference and the volume of the airtight system;

[0040] a second calculation module, for obtaining a current internal air pressure of the airtight system after running for a second preset time according to the amount of gas particle loss, storing the current internal air pressure and obtaining a current external air pressure based on the current internal air pressure and the position of the airtight system, executing a cycle according to the current internal air pressure and the current external air pressure until a preset number of cycles is reached, stopping the cycle and storing the current internal air pressure obtained in each cycle;

[0041] The analysis module is used to perform fitting analysis on the stored multiple current internal air pressures to obtain the maximum or minimum value of the internal air pressure of the airtight system, and the time corresponding to the maximum or minimum value.

[0042] A third aspect of an embodiment of the present invention provides a computer device, including:

[0043] Memory for storing computer programs;

[0044] A processor is used to implement the steps of the airtight system pressure balance analysis method of the first aspect when executing a computer program.

[0045] A fourth aspect of an embodiment of the present invention provides a storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the airtight system pressure balance analysis method of the first aspect are implemented.

[0046] The technical solution of the present invention has the following advantages:

[0047] The airtight system pressure balance analysis method provided by the embodiment of the present invention obtains the actual internal air pressure and the actual external air pressure of the airtight system after running for a period of time, and obtains the actual pressure difference. According to the actual pressure difference and the volume of the airtight system, the gas particle loss of the airtight system after running for a second preset time is calculated by using the constructed internal and external pressure difference fitting function and the internal and external pressure difference derivative function; then, according to the gas particle loss, the current internal air pressure of the airtight system after running for another period of time is obtained, the current internal air pressure is stored, and the current external air pressure is obtained based on the current internal air pressure and the position of the airtight system, and the cycle process is performed according to the current internal air pressure and the current external air pressure until the preset number of cycles is reached, the cycle is stopped, and the current internal air pressure obtained in each cycle is stored; the multiple stored current internal air pressures are fitted and analyzed to obtain the maximum or minimum value of the internal air pressure of the airtight system, as well as the time corresponding to the maximum or minimum value. The above method makes the internal air pressure estimation result of the airtight system more accurate by performing differential analysis on the airtight system. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0049] Figure 1 Flow chart of the airtight system pressure balance analysis method in an embodiment of the present invention;

[0050] Figure 2 A flow chart for constructing an internal and external pressure difference fitting function of a pressure balance analysis method for an airtight system in an embodiment of the present invention;

[0051] Figure 3 It is a flow chart of internal air pressure calculation of the airtight system pressure balance analysis method in an embodiment of the present invention;

[0052] Figure 4 4 is a structural block diagram of a pressure balance analysis device for an airtight system in an embodiment of the present invention. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] In the description of the present invention, it should be noted that the terms "first", "second" and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0055] The airtight system pressure balance analysis method provided by the embodiment of the present invention is as follows: Figure 1 As shown, Figure 1 The flow chart of the pressure balance analysis method of the airtight system includes steps S101 to S104, and each step is as follows:

[0056] S101: Acquire the actual internal air pressure and the actual external air pressure of the airtight system after the airtight system has been running for a first preset time.

[0057] In this embodiment, the airtight system equipped with a pressure balancing element has the same internal and external air pressure in the initial state. However, if the box or vehicle system is transported or running, the ambient air pressure changes due to the change in altitude. As a result, a pressure difference is generated inside and outside the airtight system, and the gas flows through the balancing element to achieve pressure difference attenuation and balance. First, obtain the actual internal air pressure P of the airtight system to be analyzed at any time t it .

[0058] The altitude of the airtight system is related to the climbing speed. According to the pressure height formula, the actual external air pressure at time t is:

[0059] P ot =g(h t )

[0060] Where P ot is the actual external air pressure, h t =vt, v is the rising speed of the airtight system, and t is the time.

[0061] When the external air pressure data is a non-pressure height curve, the air pressure value can be collected by the external environment pressure measuring device.

[0062] It should be noted that an airtight system refers to a closed system that can prevent the free exchange of gas between the system and the external environment. The pressure balance element is a component installed in the airtight system. Its main function is to adjust the pressure difference between the inside and outside of the system so that the air pressure inside and outside the system can reach a balanced state or control the pressure difference within a safe and reasonable range.

[0063] S102: Based on the actual internal air pressure and the actual external air pressure, an actual pressure difference is obtained. According to the actual pressure difference and the volume of the airtight system, the amount of gas particle loss of the airtight system after running for a second preset time is calculated using the constructed internal and external pressure difference fitting function and the internal and external pressure difference derivative function.

[0064] In this embodiment, the pressure difference at time t is obtained based on the actual external air pressure of the airtight system and the actual external air pressure at any instant t. In the application state, the effective air permeable area determined by the design of the airtight system is S act , then the internal and external pressure difference is ΔP iot When the actual system gas passes through the actual permeable system, the particle penetration rate can be calculated by the following formula:

[0065]

[0066] Where, L act is the particle penetration rate, S act The effective ventilation area determined for the airtight system design, S cail is the area of ​​the permeable element connected to the airtight system, ΔP iot is the internal and external pressure difference.

[0067] By using the pressure difference at time t and the volume of the airtight system, and by using the constructed internal and external pressure difference fitting function and the internal and external pressure difference derivative function, the amount of gas particles lost from the pressure balance element can be known.

[0068] In one embodiment, according to the actual pressure difference and the volume of the airtight system, the gas particle loss of the airtight system after running for a second preset time is calculated by using the constructed internal and external pressure difference fitting function and the internal and external pressure difference derivative function, including:

[0069] The actual pressure difference is input into the internal and external pressure difference fitting function for calculation to obtain the actual time;

[0070] The particle passing rate is obtained according to the actual time, the derivative of the internal and external pressure difference and the volume of the airtight system;

[0071] According to the particle passing rate, the gas particle loss amount of the airtight system after running for the second preset time is calculated, wherein the expression of the gas particle loss amount is:

[0072] ΔN fit =Δt*K fit

[0073] Where, ΔN fit is the gas particle loss, K fit is the particle passing rate, and Δt is the difference between the second preset operation time and the first preset operation time of the airtight system.

[0074] In this embodiment, the pressure difference at time t is obtained according to the internal air pressure and external air pressure of the airtight system at any instant t. When time t is iterated to time t+Δt, the internal air pressure and external air pressure change. According to Knudsen's law, under a certain pressure difference, the air permeability (number of particles) is proportional to the area of ​​the air permeable element. The pressure difference ΔP at time t is input into the internal and external pressure difference fitting function P c =f(x) to calculate and solve for the x corresponding to ΔP t , which is the actual time. t Input the internal and external pressure difference derivative function Q = g(x), and solve it by inverse function solution or Newton iteration method to obtain the equivalent gas particle loss rate over time, the pressure difference ΔP and the equivalent gas particle loss rate K fit =y(ΔP) The function relationship conversion process is:

[0075]

[0076] In the formula, K fit is the particle loss rate, P c is the fitting function of the internal and external pressure difference, R is the universal gas constant, T is the gas temperature, V cail is the volume of the airtight system.

[0077] When the time t is iterated to the time t+Δt, when Δt is small enough, the slope of the calibration data at time t can be used to approximate the attenuation rate at time t+Δt, and the amount of gas particles lost, that is, the gas particle loss, is:

[0078]

[0079] In the formula, K fit is the particle loss rate, ΔP iot is the internal and external pressure difference, S cail is the area of ​​the ventilation element, S act is the effective ventilation area of ​​the ventilation element, P it is the actual internal pressure, P ot is the actual external air pressure, ΔN fitis the gas particle loss.

[0080] In one embodiment, the internal and external pressure difference fitting function and the internal and external pressure difference derivative function are obtained by testing the airtight system, including:

[0081] Acquire the air permeable area of ​​the air permeable element, and acquire internal air pressure test data and external air pressure test data of an airtight system connected to the air permeable element at multiple preset moments;

[0082] Based on the internal air pressure test data and the external air pressure test data, the test pressure difference at each preset time is obtained, and a fitting calculation is performed according to the test pressure difference at each preset time to obtain an internal and external pressure difference fitting function;

[0083] The internal and external pressure difference fitting function is differentiated to obtain the internal and external pressure difference derivative function.

[0084] In this embodiment, if Figure 2 As shown, the test calibration area S cail The permeable element is connected to the constant volume V cail The airtight system of the constant volume airtight system is collected to collect the cumulative change data of the internal air pressure of the constant volume airtight system over time. The collected "air pressure-time" data is processed to fit and calculate the functional relationship between the pressure difference between the inside and outside of the tank and time (x), that is, the fitting function of the pressure difference between the inside and outside of the tank P c =f(x), calculate the first-order derivative function of the internal and external pressure difference fitting function Q=g(x).

[0085] In one embodiment, obtaining internal air pressure test data and external air pressure test data of an airtight system connected to a breathable element at a plurality of preset moments includes:

[0086] Inputting gas into the airtight system and stopping the inputting of gas after the internal air pressure of the airtight system reaches a first preset air pressure value;

[0087] The internal air pressure test data and external air pressure test data of the airtight system are recorded once after a preset time interval until the pressure difference between the internal air pressure and the external air pressure of the airtight system reaches a second preset air pressure value and then the recording is stopped to obtain the internal air pressure test data and external air pressure test data at each preset moment.

[0088] In this embodiment, a pressure measuring element is arranged in the constant volume airtight system, and the airtight system is connected to the air supply circuit to establish a positive pressure inside the sealed gas tank to a preset value P cail , the internal air pressure reaches the preset value P cail After that, close the air supply valve. In the airtight system, only the permeable components are in the external environment for gas exchange. When the valve is closed, the internal air pressure changes over time and the accumulated data are recorded until the internal air pressure approaches the ambient pressure.

[0089] It should be noted that the interval time for recording the cumulative change data of the internal air pressure over time includes but is not limited to the selected time intervals of 1s and 0.5s, and can be set according to actual analysis requirements.

[0090] S103. According to the amount of gas particle loss, obtain the current internal air pressure of the airtight system after running for a second preset time, store the current internal air pressure and obtain the current external air pressure based on the current internal air pressure and the position of the airtight system, execute a cycle according to the current internal air pressure and the current external air pressure until a preset number of cycles is reached, stop the cycle and store the current internal air pressure obtained in each cycle.

[0091] In this embodiment, when the state iteration at time t reaches time t+Δt, the reduction amount ΔN of internal gas particles in the airtight system is calculated according to the gas state equation: state According to the law of conservation of matter, the gas particle loss is equal to the internal gas particle reduction, and the gas pressure at the time of iteration to t+Δt is obtained, that is, the current internal gas pressure of the airtight system after running for the second preset time. it+Δt After that, if the iteration process does not reach the termination condition, the air pressure at time t+Δt is stored, and the calculation is continued based on the current internal air pressure until the iteration termination condition is reached, and the current internal air pressure at each iteration is obtained.

[0092] In one embodiment, obtaining the current internal air pressure of the airtight system after running for a second preset time according to the amount of gas particle loss includes:

[0093] Based on the gas state equation, a gas particle number change function of the airtight system after running for a second preset time is constructed according to the actual internal gas pressure;

[0094] After jointly calculating the gas particle loss amount and the gas particle number change function, the current internal air pressure of the airtight system after running for a second preset time is obtained, wherein the second preset time is greater than the first preset time.

[0095] In this embodiment, the reduction amount of internal gas particles in the airtight system ΔN is calculated according to the gas state equation: state , which is the gas particle number change function. According to the calibration data, the amount of gas particles lost from the pressure balance element can be known. According to the law of conservation of matter, ΔN state =ΔN fit Based on this, the internal pressure P at the known time t can be it and P 0t In this case, the internal pressure P at time t+Δt is obtained by iterative calculation it+Δt .

[0096] It should be noted that the first preset time refers to the time when the airtight system runs to time t, and the second preset time refers to the time when the airtight system runs to time t+Δt.

[0097] In one embodiment, based on the gas state equation, a gas particle number change function of the airtight system after running for a second preset time is constructed according to the actual internal gas pressure, including:

[0098] The actual internal gas pressure is input into the gas state equation to obtain the number of first gas particles, where the expression of the number of first gas particles is:

[0099]

[0100] Where N act,t is the number of first gas particles in the airtight system after the first preset time of operation, P it is the actual internal pressure, T t is the gas temperature of the airtight system after the first preset time of operation, R is the universal gas constant, V act The gas volume of the airtight system after the first preset operation time;

[0101] Based on the gas state equation, the gas particle number change function of the airtight system after running for the second preset time is constructed using the first gas particle number, wherein the expression of the gas particle number change function is:

[0102]

[0103] Where N act,t is the number of first gas particles in the airtight system after the first preset time of operation, P it+Δt is the internal air pressure of the airtight system after the second preset time of operation, T t+Δt is the gas temperature of the airtight system after the second preset time of operation, R is the universal gas constant, V act It is the gas volume of the airtight system after running for the second preset time.

[0104] In this embodiment, the actual internal pressure of the airtight system when it runs to time t is P it , the actual external pressure is P 0t , using the gas state equation, calculate the number of gas particles at time t, where the number of gas particles at time t is:

[0105]

[0106] Where N act,t is the number of gas particles at time t, P it is the actual internal pressure, T tis the gas temperature of the airtight system at time t, R is the universal gas constant, V act is the gas volume of the airtight system at time t.

[0107] Then, when the airtight system runs to the time t+Δt, the number of gas particles at the time t+Δt should be:

[0108]

[0109] Where N act,t is the number of first gas particles in the airtight system at time t+Δt, P it+Δt is the internal air pressure of the airtight system at time t+Δt, T t+Δt is the gas temperature of the airtight system at time t+Δt, R is the universal gas constant, V act is the gas volume of the airtight system at time t+Δt.

[0110] It should be noted that the first preset time refers to the time when the airtight system runs to time t, and the second preset time refers to the time when the airtight system runs to time t+Δt.

[0111] In one embodiment, a cycle is performed according to the current internal air pressure and the current external air pressure, including:

[0112] According to the current internal air pressure and the current external air pressure, the updated actual pressure difference is obtained;

[0113] According to the updated actual pressure difference and the volume of the airtight system, the new gas particle loss of the airtight system is calculated by using the constructed internal and external pressure difference fitting function and the internal and external pressure difference derivative function;

[0114] According to the amount of gas particle loss, a new current internal air pressure of the airtight system after the preset operation time is obtained, the new current internal air pressure is stored, and a new current external air pressure is obtained based on the new current internal air pressure and the position of the airtight system;

[0115] The new current internal air pressure is determined as the current internal air pressure, the new external air pressure is determined as the current external air pressure and stored, and then the updated actual pressure difference step is obtained according to the current internal air pressure and the current external air pressure.

[0116] In this embodiment, if Figure 3 As shown, P is set according to the trend of air pressure change. it , P 0t There is a small difference between the two (such as 0.001KPa, etc.) as the starting point of iteration. Figure 3 The steps in the flowchart are iterated at set time intervals to solve a series of internal pressures P it+Δt .

[0117] Specifically, the internal pressure P at the time of iteration to t+Δt is it+Δt , determine whether the iteration process reaches the termination condition. If not, store the air pressure at time t+Δt, and then set the next iteration condition to be initialized to t+Δt→t, P it+Δt →P it , the gas particle loss amount is obtained according to the new actual internal air pressure and the actual external air pressure, and based on the gas particle loss amount, the new current internal air pressure of the airtight system is obtained and stored until the iteration termination condition is reached to obtain the stored current internal air pressure sequence.

[0118] It should be noted that the time interval is set according to the actual external environment pressure difference change and the scene, for example, it can be selected as 20ms, 50ms, 100ms, 200ms, 500ms or other time intervals for calculation.

[0119] S104, performing fitting analysis on the stored multiple current internal air pressures to obtain the maximum value or minimum value of the internal air pressure of the airtight system, and the time corresponding to the maximum value or minimum value.

[0120] In this embodiment, a series of internal pressures P are obtained. it+Δt After that, the difference between the internal pressure value and the external pressure value is the pressure value of the internal environment relative to the external environment. By performing statistical analysis or function fitting analytical analysis on the corresponding data of the internal pressure curve, the extreme internal pressure values ​​under different configuration numbers of balancing elements and the time corresponding to the internal pressure reaching the threshold value can be obtained respectively.

[0121] The present invention performs differential processing on the airtight system process, analyzes the equilibrium state between physical factors such as gas volume, flow, pressure, and velocity under the time element, directly calculates the pressure in the confined space, and obtains more accurate calculation results. It can also be iterated in complex airtight systems (such as sealing systems in air transport cabins, etc.) and has strong adaptability.

[0122] The airtight system pressure balance analysis device provided by the embodiment of the present invention is as follows: Figure 4 As shown, Figure 4 This is a block diagram of the pressure balance analysis device for the airtight system, including:

[0123] An acquisition module 401 is used to acquire the actual internal air pressure and the actual external air pressure of the airtight system after the airtight system runs for a first preset time;

[0124] The first calculation module 402 is used to obtain an actual pressure difference based on the actual internal air pressure and the actual external air pressure, and calculate the gas particle loss of the airtight system after the second preset time of operation by using the constructed internal and external pressure difference fitting function and the internal and external pressure difference derivative function according to the actual pressure difference and the volume of the airtight system;

[0125] The second calculation module 403 is used to obtain the current internal air pressure of the airtight system after running for a second preset time according to the gas particle loss, store the current internal air pressure and obtain the current external air pressure based on the current internal air pressure and the position of the airtight system, execute a cycle according to the current internal air pressure and the current external air pressure until a preset number of cycles is reached, stop the cycle and store the current internal air pressure obtained in each cycle;

[0126] The analysis module 404 is used to perform fitting analysis on the stored multiple current internal air pressures to obtain the maximum or minimum value of the internal air pressure of the airtight system, and the time corresponding to the maximum or minimum value.

[0127] The specific implementation of the device for analyzing pressure balance in an airtight system is substantially the same as the specific implementation of the method for analyzing pressure balance in an airtight system described above, and will not be described in detail herein.

[0128] In one embodiment of the present application, a computer device is provided, which includes a memory and a processor, wherein a computer program is stored in the memory, and the above steps are implemented when the processor executes the computer program; the implementation principle and technical effect of the computer device provided in this embodiment are similar to those of the above method embodiment, and will not be repeated here.

[0129] In one embodiment of the present application, a computer-readable storage medium is provided, on which a computer program is stored, and the above steps are implemented when the computer program is executed by a processor; the computer-readable storage medium provided in this embodiment has an implementation principle and technical effects similar to those of the above method embodiment, and will not be repeated here.

[0130] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0131] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for analyzing pressure balance of an airtight system, characterized in that: include: Acquire the actual internal air pressure and the actual external air pressure of the airtight system after the airtight system runs for a first preset time; Based on the actual internal air pressure and the actual external air pressure, an actual pressure difference is obtained, and according to the actual pressure difference and the volume of the airtight system, the amount of gas particle loss of the airtight system after running for a second preset time is calculated by using a constructed internal and external pressure difference fitting function and an internal and external pressure difference derivative function; According to the gas particle loss amount, a current internal air pressure of the airtight system after running for a second preset time is obtained, the current internal air pressure is stored and a current external air pressure is obtained based on the current internal air pressure and the position of the airtight system, a cycle is performed according to the current internal air pressure and the current external air pressure until a preset number of cycles is reached, the cycle is stopped and the current internal air pressure obtained in each cycle is stored; A fitting analysis is performed on the stored multiple current internal air pressures to obtain the maximum value or minimum value of the internal air pressure of the airtight system, and the time corresponding to the maximum value or the minimum value.

2. The airtight system pressure balance analysis method according to claim 1, characterized in that: The method of calculating the gas particle loss of the airtight system after running for a second preset time by using the constructed internal and external pressure difference fitting function and the internal and external pressure difference derivative function according to the actual pressure difference and the volume of the airtight system includes: Input the actual pressure difference into the internal and external pressure difference fitting function for calculation to obtain the actual time; Obtaining a particle passing rate according to the actual time, the derivative of the internal and external pressure difference and the volume of the airtight system; According to the particle passing rate, the gas particle loss amount of the airtight system after running for a second preset time is calculated, wherein the expression of the gas particle loss amount is: ΔN fit =Δt*K fit Where, ΔN fit is the gas particle loss, K fit is the particle passing rate, and Δt is the difference between the second preset running time and the first preset running time of the airtight system.

3. The airtight system pressure balance analysis method according to claim 2, characterized in that: The internal and external pressure difference fitting function and the internal and external pressure difference derivative function are obtained by testing the airtight system, including: Acquire the air permeable area of ​​the air permeable element, and acquire the internal air pressure test data and the external air pressure test data of the airtight system connected to the air permeable element at multiple preset moments; Based on the internal air pressure test data and the external air pressure test data, the test pressure difference at each preset moment is obtained, and a fitting calculation is performed according to the test pressure difference at each preset moment to obtain an internal and external pressure difference fitting function; The internal and external pressure difference fitting function is differentiated to obtain the internal and external pressure difference derivative function.

4. The airtight system pressure balance analysis method according to claim 3, characterized in that: The obtaining of internal air pressure test data and external air pressure test data of the airtight system connected to the air permeable element at a plurality of preset moments includes: Inputting gas into the airtight system, and stopping the inputting of gas after the internal air pressure of the airtight system reaches a first preset air pressure value; The internal air pressure test data and the external air pressure test data of the airtight system are recorded once after a preset time interval, and the recording is stopped after the pressure difference between the internal air pressure and the external air pressure of the airtight system reaches a second preset air pressure value, so as to obtain the internal air pressure test data and the external air pressure test data at each preset moment.

5. The airtight system pressure balance analysis method according to claim 1, characterized in that: The step of obtaining the current internal air pressure of the airtight system after running for a second preset time according to the gas particle loss amount includes: Based on the gas state equation, a gas particle number change function of the airtight system after running for a second preset time is constructed according to the actual internal gas pressure; After jointly calculating the gas particle loss amount and the gas particle number change function, the current internal air pressure of the airtight system after running for a second preset time is obtained, wherein the second preset time is greater than the first preset time.

6. The airtight system pressure balance analysis method according to claim 5, characterized in that: The gas particle number change function of the airtight system after running for a second preset time is constructed based on the gas state equation according to the actual internal gas pressure, including: The actual internal gas pressure is input into the gas state equation to obtain the first gas particle number, wherein the expression of the first gas particle number is: Where N act,t is the number of first gas particles in the airtight system after the first preset time of operation, P it is the actual internal pressure, T t is the gas temperature of the airtight system after the first preset time of operation, R is the universal gas constant, V act is the gas volume of the airtight system after running for a first preset time; Based on the gas state equation, the gas particle number change function of the airtight system after running for a second preset time is constructed using the first gas particle number, wherein the expression of the gas particle number change function is: Where N act,t is the number of first gas particles in the airtight system after the first preset time of operation, P it+Δt is the internal air pressure of the airtight system after running for the second preset time, T t+Δt is the gas temperature of the airtight system after the second preset time of operation, R is the universal gas constant, V act It is the gas volume of the airtight system after running for a second preset time.

7. The airtight system pressure balance analysis method according to claim 1, characterized in that: The performing of a cycle process according to the current internal air pressure and the current external air pressure comprises: Obtaining an updated actual pressure difference according to the current internal air pressure and the current external air pressure; According to the updated actual pressure difference and the volume of the airtight system, the new gas particle loss of the airtight system is calculated by using the constructed internal and external pressure difference fitting function and the internal and external pressure difference derivative function; According to the gas particle loss amount, obtaining a new current internal air pressure of the airtight system after running for a preset time, storing the new current internal air pressure and obtaining a new current external air pressure based on the new current internal air pressure and the position of the airtight system; Determine the new current internal air pressure as the current internal air pressure, determine the new external air pressure as the current external air pressure and store them, then return to the step of obtaining an updated actual pressure difference based on the current internal air pressure and the current external air pressure.

8. A pressure balance analysis device for an airtight system, characterized in that: include: An acquisition module, used for acquiring an actual internal air pressure and an actual external air pressure of the airtight system after the airtight system has been running for a first preset time; A first calculation module is used to obtain an actual pressure difference based on the actual internal air pressure and the actual external air pressure, and calculate the gas particle loss of the airtight system after running for a second preset time by using a constructed internal and external pressure difference fitting function and an internal and external pressure difference derivative function according to the actual pressure difference and the volume of the airtight system; a second calculation module, configured to obtain a current internal air pressure of the airtight system after running for a second preset time according to the gas particle loss amount, store the current internal air pressure and obtain a current external air pressure based on the current internal air pressure and the position of the airtight system, execute a cycle according to the current internal air pressure and the current external air pressure until a preset number of cycles is reached, stop the cycle and store the current internal air pressure obtained in each cycle; The analysis module is used to perform fitting analysis on the stored multiple current internal air pressures to obtain the maximum or minimum value of the internal air pressure of the airtight system, and the time corresponding to the maximum or minimum value.

9. A computer device, characterized in that: include: Memory for storing computer programs; A processor, configured to implement the airtight system pressure balance analysis method as described in any one of claims 1 to 7 when executing the computer program.

10. A storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by a processor, the airtight system pressure balance analysis method according to any one of claims 1 to 7 is implemented.

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