Iso-density curve-based temperature and pressure decoupling control method and related device

Abstract

The application discloses a temperature-pressure decoupling control method based on an isodensity curve and related equipment, and the method comprises the following steps: after determining a target cabin for temperature-pressure control, obtaining an initial state and a target state of the target cabin; judging whether the initial state and the target state are located in the same isodensity curve range based on an isodensity temperature-pressure decoupling control graph of the target cabin; if not, calculating at least two intermediate target states by using the change relationship between the temperature and the pressure under the quantitative premise based on the target temperature and the target pressure in the target state; and performing temperature and pressure control on the liquid in the target cabin based on the at least two intermediate target states, so as to adjust the liquid from the initial state to the target state. By using the isodensity temperature-pressure decoupling control graph of the liquid, the temperature and the pressure of the liquid in the target cabin are adjusted by using the mode of separately controlling the temperature and the pressure, so as to solve the problem that it is difficult to simultaneously and accurately control the temperature and the pressure in the existing high-temperature and high-pressure environment.

Description

Temperature-pressure decoupling control method and related equipment based on isodense curves Technical Field

[0001] This invention relates to the field of artificial intelligence, and in particular to a temperature and pressure decoupling control method and related equipment based on isodense curves. Background Technology

[0002] With the development of science and technology, the control of water temperature and pressure in sealed environments is currently mainly based on the coupling relationship between temperature and pressure. However, this control method cannot achieve any combination of temperature and pressure.

[0003] The current approach addresses this by reconstructing the water within the sealed environment. This involves re-injecting initial-state water that satisfies the coupling relationship between the target temperature and pressure, and then controlling either the temperature or pressure individually. While this allows for control of any combination of temperature and pressure, it requires continuous reconstruction of the initial environment. This is impractical for sealed environments, especially high-temperature and high-pressure environments such as deep in-situ environments, and significantly reduces control precision. Summary of the Invention

[0004] The purpose of this invention is to provide a temperature and pressure decoupling control method and related equipment based on isodense curves, so as to solve the problem that it is difficult to achieve precise control of temperature and pressure simultaneously under existing high temperature and high pressure environments.

[0005] To achieve the above objectives, a first aspect of the present invention provides a temperature-pressure decoupling control method based on isodense curves, the method comprising:

[0006] After determining the target chamber for temperature and pressure control, the initial state and target state of the target chamber are obtained;

[0007] Based on the isodense temperature and pressure decoupling control curve of the target cabin, determine whether the initial state and the target state are within the same isodense curve range;

[0008] If not, then based on the target temperature and target pressure in the target state, at least two intermediate target states are calculated using the relationship between temperature and pressure under quantitative premise.

[0009] Based on at least two intermediate target states, the liquid in the target chamber is subjected to temperature and pressure control to adjust the liquid from the initial state to the target state.

[0010] Optionally, determining whether the initial state and the target state are within the same isodense curve range based on the isodense temperature-pressure decoupling control curve of the target cabin includes:

[0011] Based on the temperature and pressure information in the initial state and the target state, the first coordinate information of the initial state and the second coordinate information of the target state are determined;

[0012] Based on the first coordinate information and the second coordinate information, the corresponding isodense curve is matched from the isodense temperature and pressure decoupling control curve diagram of the target cabin;

[0013] Solve the liquid state equation that matches the initial state under isodense conditions, and determine whether the solution obtained from the equation contains the second coordinate information.

[0014] Optionally, if there are two intermediate target states, the step of calculating the at least two intermediate target states based on the target temperature and target pressure in the target states, using the relationship between temperature and pressure under quantitative premises, includes:

[0015] Using the target pressure in the target state as input, the first intermediate target state is calculated by utilizing the temperature and pressure relationship of the isodensity curve corresponding to the initial state.

[0016] Using the temperature in the first intermediate target state as input, the second intermediate target state is calculated using the relationship between temperature and pressure changes in the isodensity curve corresponding to the target state.

[0017] Optionally, if there are more than two intermediate target states, the step of calculating at least two intermediate target states based on the target temperature and target pressure in the target states, using the relationship between temperature and pressure under quantitative premises, includes:

[0018] Based on the distribution pattern of the isodense curves in the isodense temperature-pressure decoupling control curve diagram, all target isodense curves located between the initial state and the target state are determined;

[0019] Using the target temperature and target pressure in the target state as inputs, the coordinates of the isodensity curves of each target are calculated using the secant method to obtain the intermediate target state on each target isodensity curve.

[0020] Optionally, the step of performing temperature and pressure control on the liquid in the target chamber based on at least two intermediate target states, adjusting the liquid from the initial state to the target state, includes:

[0021] The initial state, at least two intermediate target states, and the target state are sorted to obtain an adjustment point sequence;

[0022] A starting point is determined from the sequence of adjustment points. From the remaining adjustment points in the sequence, one that is adjacent to the starting point in the order is selected as the next adjustment point. The temperature and pressure of the liquid in the target chamber are controlled by temperature control and / or pressure control until the next adjustment point is reached, until the temperature and pressure both meet the target temperature and target pressure in the target state.

[0023] Optionally, temperature and / or pressure control methods are used to bring the liquid in the target chamber to the next adjustment point, including:

[0024] Identify whether the starting point and the next adjustment point are on the same isodense curve;

[0025] If so, temperature or pressure control methods are used to adjust the temperature and pressure of the liquid in the target chamber to the next adjustment point;

[0026] If not, a constant-temperature depressurization method is used to bring the temperature and pressure of the liquid in the target chamber to the next adjustment point.

[0027] Optionally, after identifying whether the starting point and the next adjustment point are on the same isodense curve, the method further includes:

[0028] The temperature and pressure ranges for the next adjustment point are calculated using the liquid state equation.

[0029] The adjustment amount between the starting point and the next adjustment point is calculated based on the temperature range or the pressure range.

[0030] A second aspect of the present invention provides a temperature-pressure decoupling control device based on isodense curves, the device comprising:

[0031] The acquisition module is used to acquire the initial state and target state of the target chamber after determining the target chamber for temperature and pressure control.

[0032] The judgment module is used to determine, based on the isodense temperature and pressure decoupling control curve of the target cabin, whether the initial state and the target state are located within the same isodense curve range;

[0033] The calculation module is used to calculate at least two intermediate target states based on the target temperature and target pressure in the target state when it is determined that they are not located within the same isodense curve range, using the relationship between temperature and pressure under quantitative premise.

[0034] An adjustment module is used to perform temperature and pressure control on the liquid in the target chamber based on at least two intermediate target states, adjusting the liquid from the initial state to the target state.

[0035] Optionally, the determination module includes:

[0036] The determining unit is used to determine the first coordinate information of the initial state and the second coordinate information of the target state based on the temperature and pressure information in the initial state and the target state;

[0037] A matching unit is used to match the corresponding isodense curve from the isodense temperature and pressure decoupling control curve diagram of the target cabin based on the first coordinate information and the second coordinate information.

[0038] The judgment unit is used to solve the liquid state equation that matches the initial state under the isodense condition and to determine whether the solution obtained by the equation contains the second coordinate information.

[0039] Optionally, the calculation module is specifically used for:

[0040] If there are two intermediate target states, the first intermediate target state is calculated by using the target pressure in the target state as input and the relationship between temperature and pressure of the isodense curve corresponding to the initial state.

[0041] Using the temperature in the first intermediate target state as input, the second intermediate target state is calculated using the relationship between temperature and pressure changes in the isodensity curve corresponding to the target state.

[0042] Optionally, the calculation module is specifically used for:

[0043] If there are more than two intermediate target states, based on the distribution pattern of the isodense curves in the isodense temperature-pressure decoupling control curve diagram, determine all target isodense curves located between the initial state and the target state;

[0044] Using the target temperature and target pressure in the target state as inputs, the coordinates of the isodensity curves of each target are calculated using the secant method to obtain the intermediate target state on each target isodensity curve.

[0045] Optionally, the adjustment module includes:

[0046] A sorting unit is used to sort the initial state, at least two intermediate target states, and the target state to obtain an adjustment point sequence;

[0047] An adjustment unit is used to determine a starting point from the adjustment point sequence, select one of the remaining adjustment points in the sequence that is adjacent to the starting point in the sorting order as the next adjustment point, and use temperature control and / or pressure control to adjust the temperature and pressure of the liquid in the target chamber to the next adjustment point until the temperature and pressure both meet the target temperature and target pressure in the target state.

[0048] Optionally, the adjustment unit is specifically used for:

[0049] Identify whether the starting point and the next adjustment point are on the same isodense curve;

[0050] If so, temperature or pressure control methods are used to adjust the temperature and pressure of the liquid in the target chamber to the next adjustment point;

[0051] If not, a constant-temperature depressurization method is used to bring the temperature and pressure of the liquid in the target chamber to the next adjustment point.

[0052] Optionally, the adjustment unit is further configured to:

[0053] The temperature and pressure ranges for the next adjustment point are calculated using the liquid state equation.

[0054] The adjustment amount between the starting point and the next adjustment point is calculated based on the temperature range or the pressure range.

[0055] A third aspect of the present invention provides a computer device comprising: a memory and at least one processor, the memory storing instructions, the memory and the at least one processor being interconnected via a circuit; the at least one processor calling the instructions in the memory to cause the computer device to perform the various steps of the temperature-pressure decoupling control based on isodense curves provided above.

[0056] A fourth aspect of the present invention provides a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the steps of the temperature-pressure decoupling control method based on isodense curves provided above.

[0057] Beneficial effects:

[0058] This invention proposes a temperature-pressure decoupling control method and related equipment based on isodense curves. The method includes: after determining the target chamber for temperature and pressure control, acquiring the initial state and target state of the target chamber; based on the isodense temperature-pressure decoupling control curve of the target chamber, determining whether the initial state and the target state are within the same isodense curve range; if not, calculating at least two intermediate target states based on the target temperature and target pressure in the target state using the relationship between temperature and pressure under quantitative conditions; and based on the at least two intermediate target states, performing temperature and pressure control on the liquid in the target chamber to adjust the liquid from the initial state to the target state. By using the isodense temperature-pressure decoupling control curve of the liquid and adjusting the liquid temperature and pressure in the target chamber by controlling temperature and pressure separately, this method solves the problem of difficulty in achieving simultaneous and precise control of temperature and pressure under existing high-temperature and high-pressure environments. Attached Figure Description

[0059] Figure 1 is a schematic flowchart of a temperature-pressure decoupling control method based on isodense curves provided in an embodiment of the present invention;

[0060] Figure 2 is a surface diagram of the equation of state of water provided in an embodiment of the present invention;

[0061] Figure 3 is a schematic diagram of the first temperature-pressure decoupling control path provided in an embodiment of the present invention;

[0062] Figure 4 is a schematic diagram of the second temperature-pressure decoupling control path provided in an embodiment of the present invention;

[0063] Figure 5 is a schematic diagram of the third temperature-pressure decoupling control path provided in the embodiment of the present invention;

[0064] Figure 6 is a schematic diagram of the fourth temperature-pressure decoupling control path provided in the embodiment of the present invention;

[0065] Figure 7 is a schematic diagram of a temperature-pressure decoupling control device based on isodense curves provided in an embodiment of the present invention;

[0066] Figure 8 is a schematic diagram of another structure of the temperature and pressure decoupling control device based on isodense curves provided in an embodiment of the present invention;

[0067] Figure 9 is a schematic diagram of a computer device provided in an embodiment of the present invention. Detailed Implementation

[0068] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0069] As shown in Figure 1, Figure 1 is a schematic flowchart of a temperature and pressure decoupling control method based on isodense curves according to an embodiment of the present invention. It should be noted that although the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than that shown here.

[0070] To achieve the above objectives, embodiments of the present invention provide a temperature-pressure decoupling control method based on isodense curves, comprising:

[0071] 110. After determining the target chamber for temperature and pressure control, obtain the initial state and target state of the target chamber.

[0072] The target chamber refers to a sealed environment in a deep in-situ environment. The initial state is determined by obtaining the setting parameters of the target chamber. The target state is obtained by obtaining control requests from external devices to the internal environment of the target chamber. The initial state is obtained by controlling the initialization of the target chamber and measuring the temperature, pressure and density in the target chamber using measuring tools.

[0073] In this embodiment, in addition to obtaining the initial state and the target state, the type of liquid in the target chamber is also obtained, and the control equations for temperature and pressure and the corresponding density curves are determined based on the type.

[0074] In practical applications, this density curve is an isodense thermo-baric decoupling control curve. This curve is specifically calculated based on the corresponding equations. The following explanation uses water as an example:

[0075] First, based on the equation of state for water, an equation of state for liquid water with an applicable range of 0-1000 MPa and 0-1000℃ is constructed:

[0076]

[0077] in,

[0078]

[0079]

[0080]

[0081]

[0082] δ=ρ / ρ c ,

[0083] τ=T c / T.

[0084] In equation (1), p is the water pressure; ρ is the water density; T is the water temperature; and R is the gas constant of water, specifically 0.4651805 kJ·kg. -1 ·K -1 ;ρ c The critical density of water is 322 kg·m³. -3 ;T c α is the critical temperature of water, specifically taken as 647.096 K; i β i γ i All of them have special thermal properties; Ai b i All are adjustable parameters; ε i B is the static dielectric constant. i C is the second virial coefficient; i D is the third virial coefficient; i c is the fourth virial coefficient; i d i Density index; t i For temperature index; n i This is an adjustable coefficient.

[0085] Then, based on the relationship between p, ρ and T in equation (1), any one of p, ρ and T is calculated quantitatively. That is, by knowing two of p, ρ and T, the third is obtained by using the secant method. The calculation formulas for p, ρ and T are shown in equations (2), (3) and (4) below:

[0086] p=p(ρ,T) (2)

[0087] ρ=ρ(T,p) (3)

[0088] T=T(ρ,p) (4)

[0089] In summary, the equation of state surface diagram for water applicable to the range of 150℃ and 140MPa is shown in Figure 2. As can be seen from Figure 2, the density of water decreases with increasing temperature and increases with increasing pressure. If water is in a closed container, the overall density of water is a fixed value. As the temperature increases, the pressure inside the container also increases. Furthermore, when the water temperature change is on the order of ℃, the pressure change is on the order of MPa.

[0090] 120. Based on the isodense temperature and pressure decoupling control curve of the target cabin, determine whether the initial state and the target state are within the same isodense curve range.

[0091] In this step, based on the surface diagram of the water equation of state in Figure 2, corresponding curves are obtained for different water densities. These curves are then combined to form an isodense temperature-pressure decoupling control curve. For example, a planar diagram of temperature and pressure changes is first obtained by mapping the surface diagram in Figure 2. Based on this planar diagram and the water equation of state, the relationship curves between water temperature and pressure at different densities are calculated. These temperature-pressure relationship curves for each density are then mapped onto the planar diagram to obtain the isodense temperature-pressure decoupling control curve.

[0092] In this embodiment, to determine whether the target state and the initial state are on the same isodensity curve, the first coordinate information of the initial state and the second coordinate information of the target state are determined based on the temperature and pressure information in the initial state and the target state.

[0093] Based on the first coordinate information and the second coordinate information, the corresponding isodense curve is matched from the isodense temperature and pressure decoupling control curve diagram of the target cabin;

[0094] Solve the liquid state equation that matches the initial state under isodense conditions, and determine whether the solution obtained from the equation contains the second coordinate information.

[0095] In practical applications, the initial temperature and pressure values ​​form the first coordinate information. Then, based on the first coordinate information, the corresponding position point is matched from the isodense temperature and pressure decoupling control curve diagram. Based on this position point, the isodense curve where the initial state is located is determined. The isodense curve of the target state is determined in the same way as the isodense curve of the initial state. Then, the two isodense curves are compared to see if they overlap.

[0096] 130. If not, then based on the target temperature and target pressure in the target state, calculate at least two intermediate target states using the relationship between temperature and pressure under quantitative premise;

[0097] In this embodiment, the intermediate target state can be determined in two ways:

[0098] The first method involves selecting an intermediate target state from the isodensity curves of the initial state and the target state, respectively. Then, based on the two intermediate target states, a control path for temperature and pressure is determined. Finally, temperature and pressure are controlled based on this control path to bring the target chamber to the target state, as shown in Figure 3.

[0099] Specifically, firstly, using the target pressure in the target state as input, the first intermediate target state is calculated using the relationship between temperature and pressure changes in the isodensity curve corresponding to the initial state;

[0100] Then, using the temperature in the first intermediate target state as input, the second intermediate target state is calculated using the relationship between temperature and pressure in the isodensity curve corresponding to the target state;

[0101] Finally, the control path for temperature and pressure is determined based on the two intermediate target states, and the temperature and pressure are controlled based on the control path to make the target cabin reach the target state.

[0102] In practical applications, the distribution pattern of the isodensity curves in the isodensity temperature-pressure decoupling control curve diagram is used to determine the score span between the initial state and the target state.

[0103] The number of isodense curves is determined based on the score span, and the number of intermediate target states is calculated from the number of isodense curves, wherein the number of intermediate target states is twice the number of isodense curves;

[0104] Using the target temperature and target pressure in the target states as standards, the liquid state equation is solved using the secant method to obtain the coordinate information of each intermediate target state.

[0105] As shown in Figure 3, this control path has only two intermediate target points, S1 and S2. The T0 and P0 of the path starting point S0 can be measured. S1 and S0 are on the same isodense curve, and S1 is located at S... t The pressure can be used to calculate the temperature T1 at S1 using equation (4). In the first stage, the temperature is increased with T1 as the target temperature. After reaching S1, the pressure needs to be released to reach S2. Since the pressure release stage is relatively rapid, while temperature is a slow variable... [2] Therefore, the cabin temperature is assumed to remain constant during the depressurization phase. S2 and S t Being on the same isodensity curve, due to the target state S t It is a range, and S can be determined according to the accuracy requirements. t The density range is given, and the pressure range of S2 can be calculated using equation (2). Using this pressure range as the target for pressure adjustment will achieve S2. After reaching S2, the pressure range will be adjusted accordingly. t By controlling the temperature as the target, S can be achieved. t .

[0106] For example, with S0 = 0.101325 MPa and 25℃, S t Taking 140±1 MPa and 150±0.1℃ as an example, the density of S0 is calculated to be 997.05 kg / m³ according to equation (2). 3 S t The density range is [980.19, 981.09] kg / m³ 3 According to equations (3) and (4), the temperature of S1 is 126.43℃ and the pressure range of S2 is [95.03, 97.31] MPa. The points corresponding to the intermediate target states of the above control paths can be obtained.

[0107] The second method is to determine other isodense curves between the isodense curve of the initial state and the isodense curve of the target state, and then select an intermediate target state on each of the other isodense curves. Based on the selected intermediate target state, the control path for temperature and pressure is determined, and finally, the temperature and pressure are controlled based on the control path to make the target chamber reach the target state, as shown in Figure 4.

[0108] Specifically, firstly, based on the distribution pattern of the isodense curves in the isodense temperature-pressure decoupling control curve diagram, all target isodense curves located between the initial state and the target state are determined;

[0109] Then, using the target temperature and target pressure in the target state as inputs, the coordinates of each target isodensity curve are calculated using the secant method to obtain the intermediate target state on each target isodensity curve;

[0110] Finally, the control path for temperature and pressure is determined based on the two intermediate target states, and the temperature and pressure are controlled based on the control path to make the target cabin reach the target state.

[0111] Using the path shown in Figure 3 to control temperature and pressure is too idealistic. In reality, since depressurization involves the target compartment performing work on the outside, it will lower the temperature inside the compartment, causing errors. Therefore, the control path shown in Figure 4 is proposed, which uses multiple water releases to approximate S. t The control method is shown in Figure 4. The intermediate target points S1, S2, and S3 along this path are shown in Table 1 below.

[0112] Table 1. Intermediate target point values ​​for the four temperature and pressure decoupling control paths.

[0113]

[0114] Among them, T0 and P0 of the path starting point S0 can be measured, ρ0=ρ(T0,P0), S1 and S0 are on the same isodense curve and S1 reaches S t If the pressure range is defined, then ρ1 = ρ0 and P1 = P t T1 = T(ρ1, P1). The first stage involves heating to a target temperature of T1, with S1 located at S... t To the left of the isodensity curve, ρ1>ρ t After the first phase stabilizes, water needs to be released into S. t The isodensity curves are close, and the water release volume is also based on the internal pressure of the tank. Note that the water release volume should not be too large. If S2 is located at S after water release... t To the right of the isodensity curve, water needs to be added to the ultra-high pressure chamber. Adding water is more complex and dangerous than releasing water and should be avoided whenever possible. Density increases with increasing pressure and decreasing temperature; at point S2, the pressure P2 > P(ρ). t Temperature T2 ≤ T1 ensures that the intermediate target point S2 is always located at S. t The location is to the left of the isodensity curve. After draining the water, the T2 and P2 of S2 are measured, and the temperature T3 at S3 is calculated. The third stage of heating is then performed with T3 as the target temperature, and this process is repeated cyclically to approximate S. t The isodensity curve eventually reaches S. t This control method separates temperature control from pressure control, effectively avoiding the effects of temperature-pressure coupling.

[0115] 140. Based on at least two intermediate target states, perform temperature and pressure control on the liquid in the target chamber to adjust the liquid from the initial state to the target state.

[0116] In this embodiment, when controlling the temperature and pressure of the target chamber using the control path shown in Figure 3, the initial state, at least two intermediate target states, and the target state are sorted to obtain an adjustment point sequence. A starting point is determined from the adjustment point sequence, and the next adjustment point is selected from the remaining adjustment points in the sequence that is adjacent to the starting point in the sorting order. The temperature and / or pressure of the liquid in the target chamber are controlled to reach the next adjustment point by means of temperature control and / or pressure control, until the temperature and pressure both meet the target temperature and target pressure in the target state.

[0117] Furthermore, the temperature and / or pressure of the liquid in the target chamber are controlled to reach the next adjustment point using temperature and / or pressure control methods, including:

[0118] Identify whether the starting point and the next adjustment point are on the same isodense curve;

[0119] If so, temperature or pressure control methods are used to adjust the temperature and pressure of the liquid in the target chamber to the next adjustment point;

[0120] If not, a constant-temperature depressurization method is used to bring the temperature and pressure of the liquid in the target chamber to the next adjustment point.

[0121] Furthermore, after identifying whether the starting point and the next adjustment point are on the same isodense curve, the method further includes:

[0122] The temperature and pressure ranges for the next adjustment point are calculated using the liquid state equation.

[0123] The adjustment amount between the starting point and the next adjustment point is calculated based on the temperature range or the pressure range.

[0124] In this embodiment, when determining the intermediate target state and the control path, the initial state and the target state can be used as the starting point and the intermediate point to calculate the direct proportional function of temperature and pressure, and the liquid in the target chamber can be controlled to reach the target state based on the direct proportional function.

[0125] Specifically, the initial state S0 is formed by filling the chamber with atmospheric pressure water at room temperature or preheated to a higher temperature. Since the control precision of the target temperature and pressure are ΔT and ΔP respectively, when the target temperature and pressure are T... t P t At that time, the target state S t It is a range, as shown in Figure 5. Because S0 and S... tLocated on different isodensity curves, the isodensity curve of the initial state S0 can never reach S upon heating. t The only way to achieve this is through a control method that involves heating and controlling the pressure simultaneously, as shown in Figure 5. However, due to the influence of temperature-pressure coupling and control accuracy, it is almost impossible to achieve a straight-line control.

[0126] Furthermore, points on the isodense curve along the line connecting the initial and target states can be selected as intermediate target states to create a control path, as shown in Figure 6. Intermediate target points S1, S2, S3, etc., are set along the isodense curve, with the target points deviating from S0S. t A straight line is used as a standard to a certain extent, surrounding S0S t Control is achieved through a straight line.

[0127] This implementation method demonstrates that after determining the target chamber for temperature and pressure control, the initial state and target state of the target chamber are obtained. Based on the isodense temperature and pressure decoupling control curve of the target chamber, it is determined whether the initial state and the target state are within the same isodense curve range. If not, based on the target temperature and target pressure in the target state, at least two intermediate target states are calculated using the relationship between temperature and pressure under quantitative conditions. Based on at least two intermediate target states, the liquid in the target chamber is subjected to temperature and pressure control to adjust the liquid from the initial state to the target state. This method is not only applicable to high-temperature and ultra-high-pressure environments of water in sealed containers, but also allows for more convenient and effective reconstruction of in-situ temperature and pressure environments, making the reconstruction process safer and more reliable. It can also improve the accuracy of temperature and pressure reconstruction, thus solving the problem of difficulty in achieving precise simultaneous control of temperature and pressure under existing high-temperature and high-pressure environments.

[0128] The temperature-pressure decoupling control method based on isodense curves in the embodiments of the present invention has been described above. The temperature-pressure decoupling control device based on isodense curves in the embodiments of the present invention is described below. As shown in Figure 7, the temperature-pressure decoupling control device based on isodense curves in the embodiments of the present invention includes:

[0129] The acquisition module 710 is used to acquire the initial state and target state of the target cabin after determining the target cabin for temperature and pressure control.

[0130] The judgment module 720 is used to determine, based on the isodense temperature and pressure decoupling control curve of the target cabin, whether the initial state and the target state are located within the same isodense curve range;

[0131] The calculation module 730 is used to calculate at least two intermediate target states based on the target temperature and target pressure in the target state when it is determined that they are not located in the same isodense curve range, and to use the relationship between the change of temperature and pressure under quantitative premise.

[0132] The adjustment module 740 is used to perform temperature and pressure control on the liquid in the target chamber based on at least two intermediate target states, and adjust the liquid from the initial state to the target state.

[0133] This embodiment uses the isodense temperature and pressure decoupling control curve of the liquid to adjust the liquid temperature and pressure of the target chamber by controlling the temperature and pressure separately, so as to solve the problem that it is difficult to achieve precise control of temperature and pressure at the same time under existing high temperature and high pressure environments.

[0134] Please refer to Figure 8, which illustrates a second embodiment of the temperature-pressure decoupling control device based on isodense curves provided in this invention. This temperature-pressure decoupling control device includes:

[0135] The acquisition module 710 is used to acquire the initial state and target state of the target cabin after determining the target cabin for temperature and pressure control.

[0136] The judgment module 720 is used to determine, based on the isodense temperature and pressure decoupling control curve of the target cabin, whether the initial state and the target state are located within the same isodense curve range;

[0137] The calculation module 730 is used to calculate at least two intermediate target states based on the target temperature and target pressure in the target state when it is determined that they are not located in the same isodense curve range, and to use the relationship between the change of temperature and pressure under quantitative premise.

[0138] The adjustment module 740 is used to perform temperature and pressure control on the liquid in the target chamber based on at least two intermediate target states, and adjust the liquid from the initial state to the target state.

[0139] Optionally, the determination module 720 includes:

[0140] The determining unit 721 is used to determine the first coordinate information of the initial state and the second coordinate information of the target state based on the temperature and pressure information in the initial state and the target state;

[0141] Matching unit 722 is used to match the corresponding isodense curve from the isodense temperature and pressure decoupling control curve diagram of the target cabin based on the first coordinate information and the second coordinate information.

[0142] The judgment unit 723 is used to solve the liquid state equation that matches the initial state under the isodense condition and to determine whether the solution obtained by the equation contains the second coordinate information.

[0143] Optionally, the computing module 730 is specifically used for:

[0144] If there are two intermediate target states, the first intermediate target state is calculated by using the target pressure in the target state as input and the relationship between temperature and pressure of the isodense curve corresponding to the initial state.

[0145] Using the temperature in the first intermediate target state as input, the second intermediate target state is calculated using the relationship between temperature and pressure changes in the isodensity curve corresponding to the target state.

[0146] Optionally, the computing module 730 is specifically used for:

[0147] If there are more than two intermediate target states, based on the distribution pattern of the isodense curves in the isodense temperature-pressure decoupling control curve diagram, determine all target isodense curves located between the initial state and the target state;

[0148] Using the target temperature and target pressure in the target state as inputs, the coordinates of the isodensity curves of each target are calculated using the secant method to obtain the intermediate target state on each target isodensity curve.

[0149] Optionally, the adjustment module 740 includes:

[0150] The sorting unit 741 is used to sort the initial state, at least two intermediate target states, and the target state to obtain an adjustment point sequence;

[0151] The adjustment unit 742 is used to determine the starting point from the adjustment point sequence, select one of the remaining adjustment points in the adjustment point sequence that is adjacent to the starting point in the sorting order as the next adjustment point, and use temperature control and / or pressure control to adjust the temperature and pressure of the liquid in the target chamber to the next adjustment point until the temperature and pressure both meet the target temperature and target pressure in the target state.

[0152] Optionally, the adjustment unit 742 is specifically used for:

[0153] Identify whether the starting point and the next adjustment point are on the same isodense curve;

[0154] If so, temperature or pressure control methods are used to adjust the temperature and pressure of the liquid in the target chamber to the next adjustment point;

[0155] If not, a constant-temperature depressurization method is used to bring the temperature and pressure of the liquid in the target chamber to the next adjustment point.

[0156] Optionally, the adjustment unit 742 is further configured to:

[0157] The temperature and pressure ranges for the next adjustment point are calculated using the liquid state equation.

[0158] The adjustment amount between the starting point and the next adjustment point is calculated based on the temperature range or the pressure range.

[0159] In summary, after determining the target chamber for temperature and pressure control, the initial and target states of the target chamber are obtained. Based on the isodense temperature and pressure decoupling control curve of the target chamber, it is determined whether the initial and target states are within the same isodense curve range. If not, based on the target temperature and target pressure in the target state, at least two intermediate target states are calculated using the relationship between temperature and pressure under quantitative premises. Based on at least two intermediate target states, the liquid in the target chamber is subjected to temperature and pressure control to adjust the liquid from the initial state to the target state. This method is not only applicable to high-temperature and ultra-high-pressure environments of water in sealed containers, but also allows for more convenient and effective reconstruction of in-situ temperature and pressure environments, making the reconstruction process safer and more reliable. It can also improve the accuracy of temperature and pressure reconstruction, thus solving the problem of difficulty in achieving precise simultaneous control of temperature and pressure under existing high-temperature and high-pressure environments.

[0160] Figures 7-8 above describe in detail the temperature and pressure decoupling control device based on isodense curves in the embodiments of the present invention from the perspective of modular functional entities. The following describes in detail the computer equipment in the embodiments of the present invention from the perspective of hardware processing.

[0161] Figure 9 is a schematic diagram of a computer device 900 provided in an embodiment of the present invention. The computer device 900 can vary considerably depending on its configuration or performance, and may include one or more central processing units (CPUs) 910 (e.g., one or more processors) and a memory 920, and one or more storage media 930 (e.g., one or more mass storage devices) for storing application programs 933 or data 932. The memory 920 and storage media 930 can be temporary or persistent storage. The program stored in the storage media 930 may include one or more modules (not shown in the figure), each module including a series of instruction operations on the computer device 900. Furthermore, the processor 910 may be configured to communicate with the storage media 930 and execute the series of instruction operations in the storage media 930 on the computer device 900 to implement the steps of the temperature-pressure decoupling control method based on isodensity curves described above.

[0162] The computer device 900 may also include one or more power supplies 940, one or more wired or wireless network interfaces 950, one or more input / output interfaces 960, and / or one or more operating systems 931, such as Windows Server, Mac OS X, Unix, Linux, FreeBSD, etc. Those skilled in the art will understand that the computer device structure shown in FIG9 does not constitute a limitation on the computer device provided by this invention, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0163] The present invention also provides a computer-readable storage medium, which can be a non-volatile computer-readable storage medium or a volatile computer-readable storage medium, wherein the computer-readable storage medium stores instructions that, when the instructions are executed on a computer, cause the computer to perform the various steps of the temperature-pressure decoupling control method based on isodense curves.

[0164] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the system, device, or unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0165] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0166] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A temperature-pressure decoupling control method based on isodense curves, characterized in that, The method includes: after determining the target chamber for temperature and pressure control, acquiring the initial state and target state of the target chamber; based on the isodense temperature and pressure decoupling control curve of the target chamber, determining whether the initial state and the target state are within the same isodense curve range; if not, calculating at least two intermediate target states based on the target temperature and target pressure in the target state using the temperature and pressure variation relationship under quantitative premise; based on the at least two intermediate target states, performing temperature and pressure control processing on the liquid in the target chamber to adjust the liquid from the initial state to the target state; the calculation of the target state based on the target temperature and target pressure in the target state using the temperature and pressure variation relationship under quantitative premise... The process involves at least two intermediate target states, including: determining all target isodensity curves between the initial state and the target state based on the distribution pattern of isodensity curves in the isodensity temperature and pressure decoupling control curve diagram; calculating the coordinates of each target isodensity curve using the secant method with the target temperature and target pressure in the target state as inputs, to obtain intermediate target states on each target isodensity curve; and adjusting the liquid in the target chamber from the initial state to the target state based on at least two intermediate target states, including: determining the temperature and pressure control path based on the two intermediate target states, and finally performing temperature and pressure control based on the control path to make the target chamber reach the target state.

2. The temperature-pressure decoupling control method based on isodense curves according to claim 1, characterized in that, The determination of whether the initial state and the target state are located within the same isodense curve range based on the isodense temperature-pressure decoupling control curve diagram of the target chamber includes: determining the first coordinate information of the initial state and the second coordinate information of the target state based on the temperature-pressure information in the initial state and the target state; matching the corresponding isodense curve from the isodense temperature-pressure decoupling control curve diagram of the target chamber based on the first coordinate information and the second coordinate information; solving the liquid state equation matching the initial state under isodense conditions, and determining whether the solution obtained by the equation contains the second coordinate information.

3. The temperature-pressure decoupling control method based on isodense curves according to claim 2, characterized in that, If there are two intermediate target states, the step of calculating at least two intermediate target states based on the target temperature and target pressure in the target state using the temperature-pressure relationship under quantitative premise further includes: using the target pressure in the target state as input, calculating a first intermediate target state using the temperature-pressure relationship of the isodensity curve corresponding to the initial state; and using the temperature in the first intermediate target state as input, calculating a second intermediate target state using the temperature-pressure relationship of the isodensity curve corresponding to the target state.

4. The temperature-pressure decoupling control method based on isodense curves according to claim 2, characterized in that, If there are more than two intermediate target states, the step of calculating at least two intermediate target states based on the target temperature and target pressure in the target states using the relationship between temperature and pressure under quantitative premise further includes: determining all target isodense curves located between the initial state and the target state based on the distribution law of isodense curves in the isodense temperature and pressure decoupling control curve diagram; and calculating the coordinates of each target isodense curve using the secant method with the target temperature and target pressure in the target states as inputs to obtain the intermediate target states on each target isodense curve.

5. The temperature-pressure decoupling control method based on isodense curves according to any one of claims 1-4, characterized in that, The step of controlling the temperature and pressure of the liquid in the target chamber based on at least two intermediate target states to adjust the liquid from the initial state to the target state further includes: sorting the initial state, at least two intermediate target states, and the target state to obtain an adjustment point sequence; determining a starting point from the adjustment point sequence; selecting one of the remaining adjustment points in the adjustment point sequence that is adjacent to the starting point in the sorting order as the next adjustment point; and using temperature control and / or pressure control to adjust the temperature and pressure of the liquid in the target chamber to the next adjustment point until the temperature and pressure both meet the target temperature and target pressure in the target state.

6. The temperature-pressure decoupling control method based on isodense curves according to claim 5, characterized in that, The method of controlling the temperature and / or pressure of the liquid in the target chamber to reach the next adjustment point includes: identifying whether the starting point and the next adjustment point are on the same isodense curve; if so, controlling the temperature or pressure of the liquid in the target chamber to reach the next adjustment point; if not, controlling the temperature and pressure of the liquid in the target chamber to reach the next adjustment point.

7. The temperature-pressure decoupling control method based on isodense curves according to claim 6, characterized in that, After identifying whether the starting point and the next adjustment point are on the same isodense curve, the method further includes: calculating the temperature range and pressure range of the next adjustment point using the liquid state equation; and calculating the adjustment amount between the starting point and the next adjustment point based on the temperature range or the pressure range.

8. A temperature-pressure decoupling control device based on isodense curves, characterized in that, The temperature-pressure decoupling control device based on isodense curves includes: an acquisition module, used to acquire the initial state and target state of the target chamber after determining the target chamber for temperature and pressure control; a judgment module, used to determine whether the initial state and the target state are located within the same isodense curve range based on the isodense temperature-pressure decoupling control curve of the target chamber; a calculation module, used to calculate at least two intermediate target states based on the target temperature and target pressure in the target state, using the relationship between temperature and pressure under quantitative premise, when it is determined that they are not located within the same isodense curve range; and an adjustment module, used to perform temperature and pressure control processing on the liquid in the target chamber based on the at least two intermediate target states, adjusting the liquid from the initial state to the target state; the initial state is determined based on the target temperature and target pressure in the target state. Pressure, using the relationship between temperature and pressure under quantitative premises, calculates at least two intermediate target states, including: determining all target isodensity curves between the initial state and the target state based on the distribution pattern of isodensity curves in the isodensity temperature-pressure decoupling control curve diagram; using the target temperature and target pressure in the target state as inputs, calculating the coordinates of each target isodensity curve using the secant method to obtain intermediate target states on each target isodensity curve; the step of performing temperature and pressure control on the liquid in the target chamber based on at least two intermediate target states to adjust the liquid from the initial state to the target state includes: determining the temperature and pressure control path based on the two intermediate target states, and finally performing temperature and pressure control based on the control path to make the target chamber reach the target state.

9. A computer device, characterized in that, The computer device includes: a memory and at least one processor, the memory storing instructions, the memory and the at least one processor being interconnected via a circuit; the at least one processor invokes the instructions in the memory to cause the computer device to execute the temperature-pressure decoupling control method based on isodense curves as described in any one of claims 1-7.

10. A computer-readable storage medium storing a computer program thereon, characterized in that, When the computer program is executed by the processor, it implements the temperature and pressure decoupling control method based on isodense curves as described in any one of claims 1-7.

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