Gas charging control method for physisorption instrument, intelligent device and storage medium

Abstract

The application relates to the technical field of physical adsorption testing, and particularly provides an aeration control method for a physical adsorption instrument, an intelligent device and a storage medium, and aims to solve the problem of low testing efficiency of the existing aeration control method. The method comprises the following steps: acquiring a target pressure point set set by a user, the target pressure point set comprising a plurality of target pressure values arranged from small to large, and taking the first target pressure value as a current target pressure value; predicting a target aeration pressure value of an outer gas chamber according to an adsorption amount increment, a temperature value of the outer gas chamber, an equilibrium pressure value and an equilibrium temperature value of a sample chamber and the current target pressure value; controlling the first valve and the second valve to fill gas into the sample chamber through the outer gas source and the outer gas chamber based on the target aeration pressure value, and acquiring an equilibrium pressure value of the outer gas chamber; and determining whether to select a next target pressure value for aeration control according to a preset standard of the equilibrium pressure value of the outer gas chamber and the target pressure value, so as to save testing time and improve testing efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of physical adsorption testing, and specifically provides an air charging control method for a physical adsorption instrument, an intelligent device, and a storage medium. BACKGROUND

[0002] A physical adsorption instrument is a key instrument for determining physical parameters such as specific surface area and pore size distribution of a porous material. In the process of physical adsorption testing, adsorbent gas needs to be charged into a sample chamber of the instrument in stages. The conventional air charging control method cannot accurately predict the charging pressure value, and it often needs to be operated multiple times to reach the target pressure point, which is time-consuming in the testing process and inefficient in multi-pressure point measurement.

[0003] Therefore, there is a need in the art for a method that can quickly and accurately achieve target pressure point air charging control. SUMMARY

[0004] The present application aims to solve the above technical problems, i.e., to solve the problem of low testing efficiency of the existing air charging control method.

[0005] In a first aspect, the present application provides an air charging control method for a physical adsorption instrument, the physical adsorption instrument comprising an outer gas chamber, a sample chamber, a first valve and a second valve, wherein the first valve is arranged between the outer gas chamber and an external gas source, and the second valve is arranged between the outer gas chamber and the sample chamber, the method comprising: step S2, obtaining a set of target pressure points set by a user, the set of target pressure points comprising a plurality of target pressure values arranged from small to large, and taking the first target pressure value as a current target pressure value to execute step S4; step S4, obtaining a temperature value of the current outer gas chamber, an equilibrium pressure value and an equilibrium temperature value of the sample chamber, and determining an adsorption amount increment based on the current target pressure value, and predicting a target charging pressure value of the outer gas chamber according to the adsorption amount increment, the temperature value of the outer gas chamber, the equilibrium pressure value and the equilibrium temperature value of the sample chamber, and the current target pressure value; step S6, controlling the first valve and the second valve in turn to charge gas into the sample chamber through the external gas source and the outer gas chamber based on the target charging pressure value, and obtaining an equilibrium pressure value of the outer gas chamber; and step S8, determining whether to select a next target pressure value for air charging control according to a preset standard of the equilibrium pressure value of the outer gas chamber and the target pressure value.

[0006] In one technical solution of the above-mentioned air charging control method for a physical adsorption instrument, step S8 comprises: determining whether the equilibrium pressure value of the outer gas chamber meets the preset standard of the target pressure value, and if not, re-executing step S4 based on the current target pressure value; and if so, selecting a next target pressure value from the set of target pressure points as a current target pressure value to re-execute step S4.

[0007] In one of the technical solutions of the gas filling control method for the physical adsorption instrument, the method further comprises: obtaining an error range set by a user for a current target pressure value; determining a lower limit and an upper limit of the current target pressure value according to the error range; and determining whether the equilibrium pressure value of the outer gas chamber meets the preset standard of the target pressure value, comprising: determining whether the equilibrium pressure value of the outer gas chamber is greater than or equal to the lower limit of the current target pressure value.

[0008] In one of the technical solutions of the gas filling control method for the physical adsorption instrument, after step S6, the method further comprises: obtaining the number of times of gas filling into the sample chamber through the external gas source and the outer gas chamber and the corresponding adsorption isotherm; and determining the adsorption amount increment based on the current target pressure value, comprising: if the number of times of gas filling is less than a preset threshold, setting the adsorption amount increment as a preset initial value; and if the number of times of gas filling is greater than or equal to the preset threshold, calculating the adsorption amount increment required to reach the current target pressure value according to the adsorption isotherm.

[0009] In one of the technical solutions of the gas filling control method for the physical adsorption instrument, the adsorption isotherm is determined by the relationship between the adsorption amount and the relative pressure obtained after multiple gas fillings, and the adsorption amount increment required to reach the current target pressure value is calculated according to the adsorption isotherm, comprising: calculating the adsorption amount increment required to reach the current target pressure value according to the logarithmic values of the adsorption amount and the relative pressure.

[0010] In one of the technical solutions of the gas filling control method for the physical adsorption instrument, the adsorption amount increment required to reach the current target pressure value is calculated according to the relationship between the adsorption amount and the relative pressure, comprising: calculating the adsorption amount increment required to reach the current target pressure value according to the logarithmic values of the adsorption amount and the relative pressure by using a linear interpolation method.

[0011] In one of the technical solutions of the gas filling control method for the physical adsorption instrument, step S6 comprises: if it is the first time of gas filling, controlling the first valve and the second valve to fill gas into the sample chamber through the external gas source and the outer gas chamber based on a preset multiple of the target gas filling pressure value; otherwise, controlling the first valve and the second valve to fill gas into the sample chamber through the external gas source and the outer gas chamber based on the target gas filling pressure value.

[0012] In one of the technical solutions of the gas filling control method for the physical adsorption instrument, before determining whether the equilibrium pressure value of the outer gas chamber meets the preset standard of the target pressure value, the method further comprises: if the lower limit of the current target pressure value is less than the upper limit of the last target pressure value, modifying the lower limit of the current target pressure value to the upper limit of the last target pressure value.

[0013] In one of the technical solutions of the gas charging control method for the physical adsorption instrument, the target gas charging pressure value of the outer gas chamber is predicted according to the adsorption amount increment, the temperature value of the outer gas chamber, the equilibrium pressure value and the equilibrium temperature value of the sample chamber, and the current target pressure value, comprising: using the static capacity method to predict the target gas charging pressure value of the outer gas chamber according to the adsorption amount increment, the temperature value of the outer gas chamber, the equilibrium pressure value and the equilibrium temperature value of the sample chamber, and the current target pressure value by using the following formula: , wherein i represents the number of gas charging; represents the target gas charging pressure value of the i th gas charging; represents the adsorption amount increment; Mass represents the sample mass; represents the equilibrium pressure value of the sample chamber in the i th gas charging; represents the equilibrium pressure value of the sample chamber in the i-1 th gas charging; represents the first parameter, , represents the volume of the outer gas chamber, represents the cold free space coefficient; represents the temperature value of the outer gas chamber in the i th gas charging; represents the equilibrium temperature value of the sample chamber in the i th gas charging.

[0014] In one of the technical solutions of the gas charging control method for the physical adsorption instrument, if the number of gas charging is greater than or equal to the preset threshold, the adsorption amount increment required to reach the current target pressure value is calculated according to the adsorption isotherm, comprising: when the number of gas charging is greater than or equal to the preset threshold, the adsorption amount increment is determined by the following formula: , wherein, represents the adsorption amount increment; i represents the number of gas charging; represents the adsorption amount in the i th gas charging; represents the adsorption amount in the i-1 th gas charging; represents the relative pressure in the i th gas charging, wherein represents the equilibrium pressure value of the sample chamber, P0 represents the saturated vapor pressure of the gas at the experimental temperature; represents the relative pressure of the current target pressure value, wherein p represents the current target pressure value.

[0015] In a second aspect, an intelligent device is provided, comprising at least one processor; and a memory connected in communication with the at least one processor; wherein the memory has a computer program stored therein, and the computer program is executed by the at least one processor to implement the method of any one of the technical solutions of the gas charging control method for the physical adsorption instrument.

[0016] In a third aspect, a computer-readable storage medium is provided, which has stored therein a plurality of program codes adapted to be loaded and run by a processor to execute the method of any one of the technical solutions of the gas filling control method for a physical adsorption instrument.

[0017] The application predicts the target gas filling pressure value through the adsorption amount increment, the temperature value of the outer gas chamber, the equilibrium pressure value and the equilibrium temperature value of the sample chamber, and the current target pressure value, and performs gas filling control based on the predicted target gas filling pressure value, thereby achieving the purpose of reducing the number of gas filling to reach the target pressure value and improving the test efficiency. By comparing the equilibrium pressure value of the outer gas chamber obtained after gas filling with the preset standard of the target pressure value, when it does not meet the standard, the current target pressure value is re-predicted and gas filling is performed, and when it meets the standard, the next target pressure value is automatically switched to, until all target pressure values are tested, thereby effectively improving the automation and continuity of gas filling control and ensuring the reliability and final accuracy of the test process.

[0018] The application introduces the error range set by the user for the current target pressure value, so that the judgment standard is more flexible and meets the actual test requirements, further improves the test efficiency under the premise of ensuring data effectiveness. By automatically correcting when the lower limit of the current target pressure value is less than the upper limit of the last target pressure value, the target pressure interval overlap caused by the error range setting is effectively prevented, and the rationality and orderliness of the pressure change in the test process are ensured.

[0019] The application uses the preset initial value of the adsorption amount increment to ensure the stability of gas filling when the number of gas filling is less than the preset threshold (at the initial stage of the test), and uses the adsorption isotherm to make more accurate prediction when the number of gas filling is greater than or equal to the preset threshold (after accumulating certain data). The purpose of improving the prediction accuracy of the target gas filling pressure value is achieved, and the effect of improving the test efficiency and accuracy is achieved. Since some adsorption models show better linear relationship in logarithmic coordinates, the application uses linear interpolation method to calculate the adsorption amount increment required to reach the current target pressure value according to the logarithmic values of adsorption amount and relative pressure, thereby further improving the prediction accuracy.

[0020] The application uses the preset multiple of the target gas filling pressure value to control gas filling for the first gas filling, and uses the target gas filling pressure value to control gas filling for other cases. This effectively solves the problem of insufficient gas filling at the initial stage due to lack of data, and this differentiated processing achieves the effect of improving fault tolerance and stability at the initial stage. BRIEF DESCRIPTION OF DRAWINGS

[0021] The disclosure of the present application will become more apparent from the following description in conjunction with the accompanying drawings. As will be readily appreciated by one skilled in the art, these drawings are not intended to limit the scope of the present application, but are merely intended for illustrative purposes. In the drawings: Figure 1 is a main flow chart of steps of a gas charging control method for a physical adsorption instrument according to an embodiment of the present application; Figure 2 is a main structural diagram of a smart device according to an embodiment of the present application. DETAILED DESCRIPTION

[0022] Some embodiments of the present application will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely used to explain the technical principles of the present application, and are not intended to limit the scope of the present application.

[0023] In the description of the present application, the terms "first", "second", and the like are used to distinguish similar objects, and are not necessarily used to describe a particular order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices. The terms "mount", "connect", "connect" should be understood broadly, for example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements, it can be a wireless connection, or a wired connection.

[0024] In addition, "module" and "processor" can include hardware, software or a combination of both. A module can include hardware circuitry, various suitable sensors, communication ports, memories, and can also include software portions such as program codes, and can be a combination of software and hardware. The processor can be a central processor, a microprocessor, a graphic processor, a digital signal processor or any other suitable processor. The processor has data and / or signal processing functions. The processor can be implemented in software, hardware or a combination of both. The computer readable storage medium includes any suitable medium that can store program codes, such as magnetic disks, hard disks, optical disks, flash memories, read-only memories, random access memories, etc.

[0025] Referring to the drawings Figure 1 , Figure 1is a main step flow diagram of a gas filling control method for a physical adsorption instrument according to an embodiment of the present application. As shown in Figure 1 The gas filling control method for a physical adsorption instrument according to the embodiment of the present application mainly includes the following steps S2 to S8.

[0026] It should be noted that the specific numerical values mentioned in the embodiments of the present application (including but not limited to target pressure values, lower and upper limits of target pressure value settings, preset initial values of adsorption amount increments, etc.) and specific ranges formed by these numerical values are only exemplary. Those skilled in the art should understand that these numerical values can be adaptively adjusted, selected and combined according to actual instrument models, sample characteristics, environmental conditions and specific precision requirements, and should not be interpreted as improper restrictions on the protection scope of the present application. Any logical adjustment or replacement of related parameters based on the inventive concept of the present application should fall within the protection scope of the present application.

[0027] Step S2, obtaining a set of target pressure points set by a user, the set of target pressure points including a plurality of target pressure values arranged from small to large, and taking the first target pressure value as the current target pressure value to execute step S4.

[0028] In the present embodiment, the first target pressure value in the plurality of target pressure values arranged from small to large is taken as the current target pressure value to execute step S4. As an example, assuming that the plurality of target pressure values in the set of target pressure points are: 10kpa, 20kpa, 30kpa, i.e. taking 10kpa as the current target pressure value to execute step S4.

[0029] In an optional implementation, the step S2 can further include the following steps S1 before the step S2, specifically including the following steps S11 and S12.

[0030] Step S11, obtaining an error range set by a user for the current target pressure value.

[0031] In the present embodiment, each target pressure value in the set of target pressure points can be individually set with an error range, and the error ranges of the respective target pressure values can be the same or different. For example, a narrow error range is set for a key target pressure value, and a wide error range is set for a non-key target pressure value, so as to reduce the test time and improve the test efficiency.

[0032] Step S12, determining the lower limit and the upper limit of the current target pressure value according to the error range.

[0033] In the embodiment, the lower limit and the upper limit of the current target pressure value are determined according to the error range set for each target pressure value in step S11. For example, assuming that the error range of each target pressure value is 10%, and the current target pressure value is 10 kPa, the lower limit and the upper limit of the current target pressure value are 9 kPa and 11 kPa respectively.

[0034] In step S4, the temperature value of the outer chamber, the equilibrium pressure value and the equilibrium temperature value of the sample chamber are obtained, and the adsorption amount increment is determined based on the current target pressure value. The target inflation pressure value of the outer chamber is predicted according to the adsorption amount increment, the temperature value of the outer chamber, the equilibrium pressure value and the equilibrium temperature value of the sample chamber, and the current target pressure value.

[0035] In the embodiment, the physical adsorption instrument includes an outer chamber, a sample chamber, a first valve and a second valve, wherein the first valve is arranged between the outer chamber and an external gas source, and the second valve is arranged between the outer chamber and the sample chamber. For example, the temperature value of the outer chamber, the equilibrium pressure value and the equilibrium temperature value of the sample chamber can be obtained in real time by a temperature sensor, a pressure sensor or the like, and the adsorption amount increment required to reach the current target pressure value can be inferred. Then, the target inflation pressure value of the outer chamber is predicted according to the adsorption amount increment, the temperature value of the outer chamber, the equilibrium pressure value and the equilibrium temperature value of the sample chamber, and the current target pressure value.

[0036] In one embodiment, the target inflation pressure value of the outer chamber is predicted according to the adsorption amount increment, the temperature value of the outer chamber, the equilibrium pressure value and the equilibrium temperature value of the sample chamber, and the current target pressure value by using the static volume method and the following formula: wherein i represents the inflation number; Pi represents the target inflation pressure value of the i th inflation; dV represents the adsorption amount increment; Mass represents the sample mass; P i represents the equilibrium pressure value of the sample chamber in the i th inflation; P i-1 represents the equilibrium pressure value of the sample chamber in the i-1 th inflation; a represents the first parameter, , V represents the volume of the outer chamber, C represents the cold free space coefficient; T i represents the temperature value of the outer chamber in the i th inflation; T i represents the equilibrium temperature value of the sample chamber in the i th inflation.

[0037] In one embodiment, the adsorption amount increment can be determined according to the current target pressure value and the inflation number. Specifically, if the inflation number is less than a preset threshold, the adsorption amount increment can be set to 0, i.e. the preset initial value of the adsorption amount increment is 0. For example, when the inflation number is 1 or 2, the adsorption amount increment dV = 0.

[0038] If the number of times of charging is greater than or equal to the preset threshold, the adsorption amount increment required to reach the current target pressure value can be calculated from the adsorption isotherm obtained after multiple times of charging. For example, if it is the third time or more of charging, the adsorption amount increment corresponding to the current target pressure value can be calculated by linear interpolation according to the obtained adsorption isotherm.

[0039] In one embodiment, when the number of times of charging is greater than or equal to the preset threshold, the adsorption amount increment can be determined by the following formula: . Wherein, represents the adsorption amount increment; i represents the number of times of charging; represents the adsorption amount of the i-th time of charging (cumulative); represents the adsorption amount of the i-1-th time of charging; represents the relative pressure of the i-th time of charging, wherein represents the equilibrium pressure value of the sample chamber, P0 represents the saturated vapor pressure of the gas at the experimental temperature; represents the relative pressure of the current target pressure value, wherein p represents the current target pressure value.

[0040] The present embodiment ensures the starting stability by using the preset initial value of the adsorption amount increment when the number of times of charging is less than the preset threshold (at the initial stage of testing), and uses the adsorption isotherm to make more accurate prediction when the number of times of charging is greater than or equal to the preset threshold (after accumulating certain data). The purpose of improving the prediction accuracy of the target charging pressure value is achieved, and the effect of improving the testing efficiency and accuracy is achieved.

[0041] In one embodiment, the adsorption amount increment required to reach the current target pressure value can also be calculated using the logarithmic value of the relative pressure according to the following formula: .

[0042] Since some adsorption models exhibit better linear relationship in logarithmic coordinates, the present embodiment calculates the adsorption amount increment required to reach the current target pressure value according to the logarithmic values of the adsorption amount and the relative pressure, which is beneficial to improve the prediction accuracy.

[0043] Step S6, based on the target charging pressure value, the first valve and the second valve are controlled in turn to charge the gas from the external gas source and the external gas chamber into the sample chamber, and the equilibrium pressure value of the external gas chamber is obtained.

[0044] In the present embodiment, the first valve is controlled to be opened, and the gas is charged from the external gas source into the external gas chamber through the first valve until the target charging pressure value is reached. Then the first valve is controlled to be closed, and the second valve is controlled to be opened, so that the gas enters the sample chamber from the external gas chamber through the second valve. After a preset time (such as 1 second delay), the equilibrium pressure value of the external gas chamber is obtained. It should be noted that the equilibrium pressure value of the external gas chamber at this time is equivalent to the overall pressure value after the external gas chamber and the sample chamber are connected.

[0045] In an alternative embodiment, if it is the first time to charge, the target charging pressure value can be enlarged by a preset multiple (e.g. 3 times) before controlling the gas to be charged, otherwise the target charging pressure value is directly used to control the gas to be charged, so as to solve the problem of insufficient charging amount in the initial stage.

[0046] In an alternative embodiment, after the above step S6, the following step S71 is further included, i.e. obtaining the charging times of the gas charged into the sample chamber through the external gas source and the external gas chamber and the corresponding adsorption isotherm. In this embodiment, the key data such as the charging times, the (cumulative) adsorption amount after the charging reaches equilibrium, the relative pressure corresponding to the adsorption amount, etc. are recorded during the adsorption test, and the adsorption isotherm is generated according to the recorded adsorption amount and the corresponding relative pressure.

[0047] Step S8, determining whether to select the next target pressure value for charging control according to the preset standard of the equilibrium pressure value of the external gas chamber and the target pressure value.

[0048] In this embodiment, the determination of whether the equilibrium pressure value of the external gas chamber meets the preset standard of the target pressure value can be the determination of whether the equilibrium pressure value of the external gas chamber is greater than or equal to the lower limit of the current target pressure value, so as to determine whether to select the next target pressure value for charging control.

[0049] In one embodiment, the above step S8 specifically includes the following steps S81 and S82.

[0050] Step S81, determining whether the equilibrium pressure value of the external gas chamber meets the preset standard of the target pressure value, and if not, re-executing step S4 based on the current target pressure value.

[0051] In this embodiment, if the equilibrium pressure value of the external gas chamber is less than the lower limit of the current target pressure value, it is considered that it does not meet the preset standard of the target pressure value, and the step S4 is re-executed using the current target pressure value.

[0052] Step S82, if it is met, the next target pressure value is selected from the target pressure point set as the current target pressure value to re-execute step S4.

[0053] In this embodiment, if the equilibrium pressure value of the external gas chamber is greater than or equal to the lower limit of the current target pressure value, it is considered that it meets the preset standard of the target pressure value, and the next target pressure value is selected for charging control. That is, the next target pressure value in the target pressure point set is used to update the current target pressure value, and the step S4 is re-executed.

[0054] In an alternative embodiment, before determining whether the equilibrium pressure value of the outer chamber is greater than or equal to the lower limit of the current target pressure value, the lower limit of the current target pressure value is compared with the upper limit of the previous target pressure value, and if the lower limit of the current target pressure value is less than the upper limit of the previous target pressure value, the lower limit of the current target pressure value is modified to the upper limit of the previous target pressure value. In this embodiment, the lower limit of the current target pressure value is modified, which can make the preset standard of the target pressure value more reasonable and ensure the rationality and orderliness of the pressure change during the test.

[0055] In one embodiment, for the case where the next target pressure value is used to update the current target pressure value immediately, and then it is determined whether the equilibrium pressure value of the outer chamber meets the preset standard of the target pressure value, the above modification method can avoid the current target pressure value and the previous target pressure value being skipped due to a small gap.

[0056] It can be understood that if the equilibrium pressure value of the outer chamber is greater than or equal to the lower limit of the current target pressure value and the current target pressure value is the last target pressure value in the set of target pressure points, the process is ended.

[0057] In one application scenario of the embodiments of the present application, BET (Brunauer-Emmett-Teller) specific surface area determination experiments are performed using a traditional step-by-step gas injection method and the method provided in the embodiments of the present application, respectively. The target pressure values of the experiments are 5 kPa, 10 kPa and 30 kPa, respectively. The traditional step-by-step method takes about 40 minutes to complete the test of all the target pressure values, and the experimental data are shown in Table 1.

[0058] Table 1. Experimental data table using the traditional step-by-step method

[0059] Pressure point (kPa) Adsorption capacity (cm 3 / g) 0.17820874 0.80294 1.47502497 1.42040 4.3819524 1.77312 8.17927495 2.00691 10.91004983 2.13132 13.71247470 2.24287 16.53954983 2.34644 19.3727999 2.44572 22.22639918 2.54268 25.2439825 2.64462 28.34559977 2.75030 31.11270070 2.84527

[0060] Using the gas injection control method for a physical adsorption instrument provided in the present application, the test of all the target pressure values takes about 20 minutes, and the corresponding experimental data are shown in Table 2.

[0061] Table 2. Experimental data table using the gas injection control method of the present application

[0062] Pressure point (kPa) Adsorption capacity (cm 3 / g) 5.40079139 1.84959 11.56996191 2.156 29.83970046 2.79510

[0063] According to the above data, the method provided in the present application can effectively save the test time and improve the test efficiency. In addition, the experimental data obtained by using the gas injection control method of the present application are only for the preset target pressure points, the adsorption amount data points are refined, there are no redundant points, the curve is smooth and reliable, the purpose of optimizing the data quality is achieved, and it is more beneficial for subsequent adsorption model fitting and material characterization analysis.

[0064] It should be noted that although the steps in the above embodiments are described in a specific order, those skilled in the art will understand that in order to achieve the effect of this application, different steps do not necessarily have to be executed in such an order. They can be executed simultaneously (in parallel) or in other orders. These adjusted solutions are equivalent to the technical solutions described in this application and therefore will also fall within the protection scope of this application.

[0065] Those skilled in the art will understand that all or part of the processes in the method of the above-described embodiment can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable file, or some intermediate form. The computer-readable storage medium can include any entity or device capable of carrying the computer program code, a medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory, a random access memory, an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc.

[0066] Another aspect of this application provides a computer-readable storage medium.

[0067] In one embodiment of a computer-readable storage medium according to this application, the computer-readable storage medium may be configured to store a program that performs the inflation control method for a physical adsorption apparatus described in the above-described method embodiments. This program may be loaded and run by a processor to implement the above-described inflation control method for a physical adsorption apparatus. For ease of explanation, only the parts related to the embodiments of this application are shown; for specific technical details not disclosed, please refer to the method section of the embodiments of this application. The computer-readable storage medium may be a storage device comprising various electronic devices. Optionally, in the embodiments of this application, the computer-readable storage medium is a non-transitory computer-readable storage medium.

[0068] Another aspect of this application provides a smart device.

[0069] In one embodiment of a smart device according to this application, the smart device may include at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores a computer program, which, when executed by the at least one processor, implements the methods described in any of the above embodiments. See Appendix Figure 2 , Figure 2 The image exemplarily illustrates a communication connection between memory 11 and processor 12 via a bus.

[0070] In some embodiments of the present application, the smart device can further include at least one sensor for sensing information. The sensor is in communication with any of the types of processors mentioned in the present application. Optionally, the smart device described in the present application can be, but is not limited to, a mobile phone, a tablet computer, a desktop computer, a laptop computer, a handheld computer, a notebook computer, a vehicle-mounted device, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA), an augmented reality (AR) \ virtual reality (VR) device, etc., and the embodiments of the present application do not limit this.

[0071] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings, but it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical solutions after these changes or replacements will all fall within the protection scope of the present application.

Claims

1. A method for controlling gas charging of a physical adsorption instrument, the physical adsorption instrument comprising an outer gas chamber, a sample chamber, a first valve and a second valve, wherein the first valve is disposed between the outer gas chamber and an external gas source, and the second valve is disposed between the outer gas chamber and the sample chamber, the method comprising: opening the first valve to allow gas to flow from the external gas source into the outer gas chamber; closing the first valve; opening the second valve to allow gas to flow from the outer gas chamber into the sample chamber; and closing the second valve. The method comprises: step S2, acquiring a target pressure point set set by a user, the target pressure point set comprising a plurality of target pressure values arranged from small to large, and a first target pressure value being taken as a current target pressure value to execute step S4; step S4, acquiring a temperature value of an outer air chamber, an equilibrium pressure value and an equilibrium temperature value of a sample chamber, and determining an adsorption amount increment based on the current target pressure value, and predicting a target inflation pressure value of the outer air chamber according to the adsorption amount increment, the temperature value of the outer air chamber, the equilibrium pressure value and the equilibrium temperature value of the sample chamber, and the current target pressure value; step S6, controlling the first valve and the second valve in sequence based on the target inflation pressure value to inflate the sample chamber with gas through an external gas source and the outer air chamber, and acquiring an equilibrium pressure value of the outer air chamber; and step S8, determining whether to select a next target pressure value for inflation control according to a preset standard of the equilibrium pressure value and the target pressure value of the outer air chamber. The step of predicting the target inflation pressure of the outer gas chamber based on the adsorption increment, the temperature of the outer gas chamber, the equilibrium pressure and temperature of the sample chamber, and the current target pressure includes: using the static volumetric method with the following formula to predict the target inflation pressure of the outer gas chamber based on the adsorption increment, the temperature of the outer gas chamber, the equilibrium pressure and temperature of the sample chamber, and the current target pressure: , where i represents the number of inflations; This represents the target inflation pressure value for the i-th inflation. Mass represents the increase in adsorption amount; Mass represents the sample mass. This represents the equilibrium pressure value of the sample chamber during the i-th inflation. This represents the equilibrium pressure value of the sample chamber during the (i-1)th inflation. Indicates the first parameter. , Indicates the volume of the outer air chamber. Indicates the cold free space coefficient; This represents the temperature value of the outer air chamber during the i-th inflation. This represents the equilibrium temperature value of the sample chamber during the i-th inflation.

2. The gas charging control method for a physical adsorption apparatus according to claim 1, wherein The step S8 comprises: judging whether the equilibrium pressure value of the outer air chamber meets the preset standard of the target pressure value, and if not, re-executing step S4 based on the current target pressure value; and if yes, re-executing step S4 by selecting a next target pressure value from the target pressure point set as the current target pressure value.

3. The gas charging control method for a physical adsorption apparatus according to claim 2, wherein The method further comprises: acquiring an error range set by the user for the current target pressure value; determining a lower limit and an upper limit of the current target pressure value according to the error range; and the judgment of whether the equilibrium pressure value of the outer air chamber meets the preset standard of the target pressure value comprises: judging whether the equilibrium pressure value of the outer air chamber is greater than or equal to the lower limit of the current target pressure value.

4. The gas charging control method for a physical adsorption apparatus according to any one of claims 1 to 3, characterized by, After step S6, the method further comprises: acquiring a number of inflations and a corresponding adsorption isotherm of the gas inflated into the sample chamber through the external gas source and the outer air chamber; and the determination of the adsorption amount increment based on the current target pressure value comprises: if the number of inflations is less than a preset threshold, setting the adsorption amount increment as a preset initial value; and if the number of inflations is greater than or equal to the preset threshold, calculating the adsorption amount increment required to reach the current target pressure value according to the adsorption isotherm.

5. The method for gas charging control for a physisorption instrument according to claim 4, wherein, The adsorption isotherm is determined by the relationship between the adsorption amount and the relative pressure after multiple inflations, and the calculation of the adsorption amount increment required to reach the current target pressure value according to the adsorption isotherm comprises: calculating the adsorption amount increment required to reach the current target pressure value according to the relationship between the adsorption amount and the relative pressure.

6. The gas charging control method for a physical adsorption apparatus according to claim 5, wherein The calculation of the adsorption amount increment required to reach the current target pressure value according to the relationship between the adsorption amount and the relative pressure comprises: calculating the adsorption amount increment required to reach the current target pressure value according to the logarithmic values of the adsorption amount and the relative pressure by using a linear interpolation method.

7. The gas charging control method for a physical adsorption apparatus according to any one of claims 1 to 3, wherein The step S6 comprises: if it is the first inflation, controlling the first valve and the second valve in sequence based on a preset multiple of the target inflation pressure value to inflate the sample chamber with gas through the external gas source and the outer air chamber; otherwise, controlling the first valve and the second valve in sequence based on the target inflation pressure value to inflate the sample chamber with gas through the external gas source and the outer air chamber.

8. The gas charging control method for a physical adsorption apparatus according to claim 3, wherein The method further comprises: if a lower limit of a current target pressure value is less than an upper limit of a previous target pressure value, modifying the lower limit of the current target pressure value to the upper limit of the previous target pressure value before determining whether the balance pressure value of the outer air chamber meets the preset standard of the target pressure value.

9. A smart device, comprising: The method comprises: at least one processor; and a memory connected to the at least one processor in communication; wherein the memory stores a computer program, and the computer program is executed by the at least one processor to implement the gas filling control method for a physical adsorption instrument according to any one of claims 1 to 8.

10. A computer readable storage medium having stored therein a plurality of program codes, characterized in that, The program code is adapted to be loaded and run by the processor to execute the gas filling control method for a physical adsorption instrument according to any one of claims 1 to 8. The program code is adapted to be loaded and run by the processor to execute the gas filling control method for a physical adsorption instrument according to any one of claims 1 to 8.

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