Method and device for compensating measurement precision of oil pressure gauge of tensioning system

Abstract

The invention relates to the technical field of tensioning systems, in particular to a tensioning system oil pressure gauge measurement precision compensation method and device, and the method comprises the steps: building a simulation model of a jack based on the obtained product information and service environment temperature of the jack, and obtaining the steady-state temperature in the jack based on the simulation model; multiple groups of actual measurement data when the jack works are obtained, an oil pressure gauge measurement error compensation model is constructed based on the multiple groups of actual measurement data, and the actual measurement data comprise pressure input of the oil pressure gauge, pressure output of the oil pressure gauge and steady-state temperature in the jack; and performing temperature compensation on the reading of the oil pressure gauge based on the oil pressure gauge measurement error compensation model to obtain the pressure input of the oil pressure gauge when the jack works in real time. According to the invention, non-probing precision compensation of the oil pressure gauge of the tensioning system is realized, and the measurement precision of the oil pressure gauge of the tensioning system is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of tensioning systems, and in particular to a method and a device for compensating the measurement accuracy of an oil pressure gauge of a tensioning system. Background Art

[0002] In the construction of prestressed bridges, the tensioning effect of prestressed tendons is a key factor in ensuring the bearing capacity of the bridge. For the tensioning system that uses an oil pressure gauge to convert tensioning force, the measurement accuracy and reading error of the oil pressure gauge are key factors affecting the accuracy of tensioning force conversion. Since the viscosity of hydraulic oil is very sensitive to temperature changes, and its viscosity change is directly related to hydraulic action, transmission efficiency and transmission accuracy, it is likely to cause the piston lubrication performance to deteriorate, the friction resistance in the jack to increase, resulting in increased pressure in the jack and insufficient tension of the prestressed tendons. The oil pressure gauge value is inconsistent with the actual force, affecting the tensioning accuracy of the prestressed tendons.

[0003] At present, the tensioning system that converts tensioning force into oil pressure gauge has the following main deficiencies: 1) The oil pressure gauge error is caused by the temperature change inside the jack, resulting in the tensioning error of the prestressed tendon; 2) There are no protective measures for the oil pressure gauge dial at the field operation site, and the dust and oil stains contaminate the dial, causing human reading errors, further increasing the deviation of the tensioning force of the prestressed tendon. Summary of the invention

[0004] The object of the present invention is to provide a method and device for compensating the measurement accuracy of an oil pressure gauge in a tensioning system, so as to solve the problem of low measurement accuracy of an oil pressure gauge in an existing tensioning system.

[0005] In order to solve the above technical problems, in a first aspect, the present invention provides a method for compensating the measurement accuracy of an oil pressure gauge of a tensioning system, comprising the following steps:

[0006] Based on the obtained product information and service environment temperature of the jack, a simulation model of the jack is constructed, and based on the simulation model, a steady-state temperature inside the jack is obtained;

[0007] Acquire multiple sets of measured data when the jack is working, and construct an oil pressure gauge measurement error compensation model based on the multiple sets of measured data, wherein the measured data includes the pressure input of the oil pressure gauge, the pressure output of the oil pressure gauge and the steady-state temperature inside the jack;

[0008] The oil pressure gauge reading is temperature compensated based on the oil pressure gauge measurement error compensation model to obtain the pressure input of the oil pressure gauge when the jack is working in real time.

[0009] In combination with the first aspect above, in some possible implementations, building an oil pressure gauge measurement error compensation model includes:

[0010] The pressure input of the oil pressure gauge is taken as the dependent variable, and the pressure output of the oil pressure gauge and the steady-state temperature inside the jack are taken as the independent variables. Based on the multiple sets of measured data, an oil pressure gauge measurement error compensation model is constructed, and the corresponding calculation formula is:

[0011]

[0012] Where P represents the pressure input of the oil pressure gauge; α i,j-i represents the polynomial coefficient; U represents the pressure output of the oil pressure gauge; T represents the steady-state temperature inside the jack; n represents the model parameter.

[0013] In combination with the first aspect above, in some possible implementations, a least squares polynomial fitting method is used to determine the polynomial coefficients in the oil pressure gauge measurement error compensation model.

[0014] In combination with the first aspect above, in some possible implementations, a simulation model of the jack is constructed based on ANSYS software.

[0015] In combination with the first aspect above, in some possible implementations, before building a simulation model of the jack based on ANSYS software, it is also necessary to set heat conduction boundary conditions.

[0016] In combination with the first aspect above, in some possible implementations, the heat conduction boundary conditions include at least: a constant temperature boundary condition at the jack inlet, an axisymmetric condition at the jack bottom boundary, and a temperature wall function boundary condition at the fluid-solid contact surface.

[0017] In combination with the first aspect above, in some possible implementations, temperature compensation is performed on the oil pressure gauge reading based on the oil pressure gauge measurement error compensation model to obtain the pressure input of the oil pressure gauge when the jack is working in real time, including:

[0018] Get the pressure output of the oil pressure gauge when the jack is working in real time;

[0019] Based on the simulation model, obtaining the steady-state temperature inside the jack when the jack is working in real time;

[0020] The pressure output of the oil pressure gauge when the jack is working in real time and the steady-state temperature inside the jack are input into the oil pressure gauge measurement error compensation model, and the oil pressure gauge measurement error compensation model outputs the pressure input of the oil pressure gauge when the jack is working in real time.

[0021] In combination with the above first aspect, in some possible implementations, the product information includes at least the geometric structure and material properties of the jack.

[0022] In combination with the first aspect above, in some possible implementations, the method further includes:

[0023] PDMS coating technology is used to set a colorless and transparent protective film on the surface of the oil gauge dial.

[0024] To solve the above technical problems, in a second aspect, the present invention also provides a tensioning system oil pressure gauge measurement accuracy compensation device, comprising a memory, a processor, and an executable computer program stored in the memory and run on the processor, and when the processor executes the computer program, the method in the above first aspect or any possible implementation of the first aspect is executed.

[0025] To solve the above technical problems, in a third aspect, the present invention further provides a computer program product, which includes: a computer program code, which, when executed on a computer, enables the computer to execute the method in the above first aspect or any possible implementation of the first aspect.

[0026] To solve the above technical problems, in a fourth aspect, the present invention further provides a computer-readable storage medium, which stores a computer program code. When the computer program code runs on a computer, the computer executes the method in the above first aspect or any possible implementation of the first aspect.

[0027] The present invention has the following beneficial effects: by constructing a simulation model of the jack based on the obtained product information and service environment temperature of the jack, and reconstructing the complex temperature field inside the jack based on the simulation model, and then constructing an oil pressure gauge measurement error compensation model, and finally realizing oil pressure gauge measurement, without changing the jack structure and the built-in temperature sensor, non-penetrating accuracy compensation of the tensioning system oil pressure gauge is realized, providing a new way and practical technical means for the measurement accuracy compensation of the existing tensioning system oil pressure gauge, and effectively improving the measurement accuracy of the tensioning system oil pressure gauge. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a flow chart of a method for compensating the measurement accuracy of an oil pressure gauge of a tensioning system according to an embodiment of the present invention;

[0030] Figure 2 It is a structural schematic diagram of the tension front card jack according to an embodiment of the present invention;

[0031] Figure 3 It is a structural schematic diagram of a heat-fluid-solid multi-field coupling calculation model of a jack according to an embodiment of the present invention;

[0032] Figure 4 It is a structural schematic diagram of a tensioning system oil pressure gauge measurement accuracy compensation system according to an embodiment of the present invention;

[0033] In the attached drawings: 1 is the oil cylinder, 2 is the through-hole sleeve, 3 is the piston, 4 is the card, 5 is the anchor cup, 6 is the support sleeve, and 7 is the support sleeve nut. DETAILED DESCRIPTION

[0034] In order to clearly illustrate the technical features of the present invention, the present invention is described in detail below through specific implementation methods in conjunction with the accompanying drawings.

[0035] Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein, which are instead provided for a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0036] It should be understood that the various steps described in the method embodiments of the present invention may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this respect.

[0037] The term "including" and its variations used herein are open inclusions, i.e., "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.

[0038] It should be noted that the concepts such as "first" and "second" mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0039] Although operations or steps are described in a specific order in the drawings in the embodiments of the present invention, it should not be understood that it is required to perform these operations or steps in the specific order shown or in a serial order, or that all the operations or steps shown must be performed to obtain the desired results. In the embodiments of the present invention, these operations or steps may be performed in series; these operations or steps may also be performed in parallel; or some of these operations or steps may be performed.

[0040] At the same time, it is understood that the data involved in the technical solution of the present invention (including but not limited to the data itself, the acquisition or use of the data) shall comply with the requirements of the relevant laws, regulations and relevant provisions. Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those generally understood by technicians in the technical field of the present invention, and all parameters or indicators in the formulas involved in the present invention are normalized values ​​that eliminate the influence of dimensions.

[0041] In order to solve the problem of low measurement accuracy of the existing oil pressure gauge in the tensioning system, an embodiment of the present invention provides a method and device for compensating the measurement accuracy of the oil pressure gauge in the tensioning system. A simulation model of the jack is constructed based on the acquired product information and service environment temperature of the jack, and the complex temperature field inside the jack is reconstructed based on the simulation model. Then, an oil pressure gauge measurement error compensation model is constructed, and finally the oil pressure gauge measurement is realized. Without changing the jack structure and the built-in temperature sensor, non-penetrating accuracy compensation of the oil pressure gauge in the tensioning system is realized, which provides a new approach and practical technical means for compensating the measurement accuracy of the oil pressure gauge in the tensioning system, and effectively improves the measurement accuracy of the oil pressure gauge in the tensioning system.

[0042] A method and device for compensating the measurement accuracy of an oil pressure gauge in a tensioning system provided by an embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0043] Figure 1 FIG. 1 is a schematic diagram showing a basic flow chart of a method for compensating the measurement accuracy of an oil pressure gauge in a tensioning system provided by an embodiment of the present invention. Figure 1 As shown, the method specifically comprises the following steps:

[0044] Step S100: constructing a simulation model of the jack based on the acquired product information and service environment temperature of the jack, and acquiring the steady-state temperature inside the jack based on the simulation model.

[0045] Figure 2 The structure of the tension front card jack is shown, and the tension front card jack is composed of a cylinder 1, a through-hole sleeve 2, a piston 3, a card 4, an anchor cup 5, a support sleeve 6, and a support sleeve nut 7. Since the tension front card jack has no built-in temperature sensor, the complex temperature field distribution information inside the jack is missing.

[0046] When considering the influence of the temperature field distribution inside the jack, it is necessary to consider the thermal-fluid-solid multi-field coupling calculation model of the jack. Figure 3The schematic diagram of the structure of the thermal-fluid-solid multi-field coupling calculation model of the jack is shown. When the jack is working, thermal stress and thermal strain will be generated due to thermal expansion. The magnitude of the tension force is directly related to the temperature field distribution when the jack is working. The thermal stress coupling analysis method is adopted, and the heat transfer boundary conditions and mechanical properties of the object are given at the same time. The coupling method is used for calculation, and the distribution of the temperature field inside the object can be directly obtained. The thermal analysis module of the ANSYS finite element analysis software is adopted, the thermal stress coupling unit is selected, the product information and service environment temperature of the jack are given, and the heat conduction boundary conditions of each surface are given. The simulation analysis of the internal thermodynamic characteristics of the jack is carried out, and the simulation model is constructed. The transient temperature field and steady-state temperature field distribution during the operation of the jack, as well as the magnitude of the thermal stress and thermal strain inside the jack shell when the steady state is reached, can be obtained. Among them, the product information of the jack includes the geometric structure, material properties and other information of the jack, which can be obtained from the product manual of the jack; the service environment temperature of the jack can be obtained through an external temperature sensor.

[0047] For the heat conduction model, the heat conduction boundary conditions mainly include the following points: (1) Constant temperature boundary condition at the jack inlet: The temperature at this location is set to 60°C. The boundary condition ensures that the initial temperature value during the simulation is consistent with the extreme working conditions of the jack on the construction site in the hot summer. (2) Axisymmetric condition at the bottom boundary of the jack: According to the geometric shape of the front-cage hydraulic jack, its bottom presents axisymmetry. Therefore, axisymmetric boundary conditions are applied at the bottom of the model, which helps to simplify the calculation and improve the simulation efficiency. (3) Temperature wall function boundary condition at the contact surface between fluid and solid: In order to calculate the heat passing through the contact surface between fluid and solid, the temperature wall function boundary condition is adopted. This boundary condition allows the temperature on both sides of the contact surface to change suddenly, which is in line with the actual situation. (4) Adiabatic conditions at other boundaries: For other boundaries of the model, it is assumed that the heat flux through these boundaries is very small and can be ignored. Therefore, these boundaries are set as adiabatic boundary conditions.

[0048] The above steps establish a simulation model based on ANSYS software based on the geometric structure, material properties, ambient temperature and other information of the jack, and then carry out thermal-fluid-solid multi-field coupling analysis, so as to reconstruct the temperature field distribution inside the jack in service.

[0049] Step S200: Acquire multiple sets of measured data when the jack is working, and construct an oil pressure gauge measurement error compensation model based on the multiple sets of measured data, wherein the measured data includes the pressure input of the oil pressure gauge, the pressure output of the oil pressure gauge and the steady-state temperature inside the jack.

[0050] Acquire multiple sets of measured data when the jack is working, and construct an oil pressure gauge measurement error compensation model based on the multiple sets of measured data. The implementation steps include:

[0051] The pressure input of the oil pressure gauge is taken as the dependent variable, and the pressure output of the oil pressure gauge and the steady-state temperature inside the jack are taken as independent variables. Based on the multiple sets of measured data, a polynomial fitting is performed, and the fitted polynomial is the oil pressure gauge measurement error compensation model.

[0052] For the above steps, multiple groups of oil pressure gauge pressure input (pressure gauge reading) P, oil pressure gauge pressure output U and the steady-state temperature T inside the jack when the jack is working are obtained. When the jack reaches a steady state, the temperatures of each point in its internal steady-state temperature field are equal or close. The steady-state temperature T inside the jack when the jack is working is obtained using a simulation model, and then the static characteristic function of the oil pressure gauge is determined, that is, the oil pressure gauge measurement error compensation model is constructed. Under the condition of meeting the accuracy requirements, the calculation formula corresponding to the oil pressure gauge measurement error compensation model is as follows:

[0053]

[0054] Among them, α i,j-i represents the polynomial coefficient; n represents the model parameter.

[0055] Based on the multiple sets of measured data obtained when the jack is working, a curve fitting method, such as the least squares polynomial fitting method, is used to obtain the polynomial under the given independent variable oil pressure gauge pressure output U according to the least squares principle. k and the steady-state temperature T inside the jack k The dependent variable P(U k ,T k ) and the measured data P k The sum of the squares of the differences σ:

[0056]

[0057] Here, m represents the number of given independent variables.

[0058] The sum of squares σ in the above formula (2) is minimized, that is:

[0059]

[0060] Solving the constructed linear equation group (3) can obtain the polynomial coefficient α in the above oil pressure gauge measurement error compensation model: 0,0 , α 0,1 , α 0,2 , α 1,0 , α 1,1 ,……,α k,l-k ,……,α 0,n The value of , where 0≤k≤n, 0≤l≤n, can be used to obtain a polynomial, which is the oil pressure gauge measurement error compensation model, and is used for oil pressure gauge temperature compensation.

[0061] According to the oil pressure gauge measurement error compensation model constructed above, a corresponding oil pressure gauge measurement error compensation software package can be developed using VB or VC software.

[0062] Step S300: performing temperature compensation on the oil pressure gauge reading based on the oil pressure gauge measurement error compensation model to obtain the pressure input of the oil pressure gauge when the jack is working in real time.

[0063] Based on the oil pressure gauge measurement error compensation model obtained above, the oil pressure gauge reading is temperature compensated to obtain the pressure input of the oil pressure gauge when the jack is working in real time, that is, to obtain a more accurate internal oil pressure of the jack. The implementation steps include:

[0064] Get the pressure output of the oil pressure gauge when the jack is working in real time;

[0065] Based on the simulation model, obtaining the steady-state temperature inside the jack when the jack is working in real time;

[0066] The pressure output of the oil pressure gauge when the jack is working in real time and the steady-state temperature inside the jack are input into the oil pressure gauge measurement error compensation model, and the oil pressure gauge measurement error compensation model outputs the pressure input of the oil pressure gauge when the jack is working in real time.

[0067] For the above steps, during the real-time operation of the jack, when it is necessary to obtain the pressure input of the oil pressure gauge, the current internal steady-state temperature T of the jack can be obtained in the same way as using the simulation model in the above step S100 to obtain the steady-state temperature inside the jack. At the same time, the pressure output U of the oil pressure gauge when the jack is currently working in real time can be obtained, and the internal steady-state temperature T and the pressure output U of the oil pressure gauge are simultaneously substituted into the oil pressure gauge measurement error compensation model, so that the oil pressure gauge measurement error compensation model outputs the temperature-compensated internal pressure of the jack (oil gauge reading), that is, the pressure input P of the oil pressure gauge, to achieve real-time compensation of the oil pressure gauge measurement accuracy.

[0068] Furthermore, the linear regression equation of the tensioning system represents the linear relationship between the pressure inside the jack (oil gauge reading) and the tensioning force. By substituting the pressure input P of the oil pressure gauge obtained when the jack is working in real time into the linear regression equation of the tensioning system, the tensioning force after temperature compensation can be obtained.

[0069] In addition, in order to reduce human reading errors, PDMS coating technology is used to spread it on the surface of the oil gauge dial to form a colorless and transparent protective film to isolate oil and dust on the construction site to keep the oil pressure gauge dial clean and clear. The process flow of PDMS coating technology is as follows:

[0070] 1) Pouring: Pour a certain amount of PDMS matrix: curing agent = 10:1 (mass ratio) into a disposable plastic cup. The approximate ratio will do. No precise weighing with a balance is required. The total amount of prepolymer depends on the size of the dial area.

[0071] 2) Stirring: Use a disposable plastic spoon to stir the PDMS prepolymer evenly. It is recommended to stir manually clockwise for 3 minutes.

[0072] 3) Lamination: Apply the evenly stirred PDMS prepolymer to the dial surface. In autumn, winter and spring, the bubbles inside the PDMS prepolymer will automatically overflow and no treatment is required. If it is in the hot summer, when the temperature of the hydraulic gauge dial is higher than 40℃, the prepolymer can be left in a cool place for half an hour to automatically degas before being applied to the dial surface.

[0073] 4) Curing: It can be cured automatically after being left to stand for several hours. The time of complete curing is mainly determined by the outdoor temperature. PDMS is colorless and transparent during and after curing, and does not affect the reading of the hydraulic gauge dial, so it can be used normally.

[0074] 5) De-filming: After a few days, if the coated dial is contaminated by oil or dust again, you can gently peel off the PDMS film, and the dial surface will be very clean and clear. Repeat the coating to protect the dial surface, prevent oil, dust and scratches, and reduce human reading errors.

[0075] The present invention reconstructs the complex temperature field inside the jack by using thermal-fluid-solid multi-field coupling calculation, and realizes non-penetrating accuracy compensation of the tensioning system oil pressure gauge without changing the jack structure and the built-in temperature sensor, providing a new way and practical technical means for the existing tensioning system oil pressure gauge measurement accuracy compensation, and effectively improving the tensioning system oil pressure gauge measurement accuracy. At the same time, the PDMS coating technology is used to keep the oil pressure gauge dial clean and clear, and it can be removed and replaced according to the needs of the site, without affecting the reading of the on-site operators, effectively reducing human errors.

[0076] Based on the same inventive concept, the embodiment of the present invention also provides a tensioning system oil pressure gauge measurement accuracy compensation device, such as Figure 4 As shown, the device includes: a memory 401, a processor 402, and a computer program 403 stored in the memory 401 and running on the processor 402, wherein when the processor 402 executes the computer program 403, the device can execute any one of the tensioning system oil pressure gauge measurement accuracy compensation methods introduced above.

[0077] The embodiment of the present invention can divide the functional modules of the device according to the above method example. For example, each functional module can be corresponded, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware. It should be noted that the division of modules in this embodiment is schematic and is only a logical function division. There may be other division methods in actual implementation.

[0078] Based on the same inventive concept, an embodiment of the present invention further provides a computer program product, which includes: computer program code, when the computer program code runs on a computer, the computer executes any one of the tensioning system oil pressure gauge measurement accuracy compensation methods introduced above.

[0079] Based on the same inventive concept, an embodiment of the present invention also provides a computer-readable storage medium, which stores a computer program code. When the computer program code runs on a computer, the computer executes any one of the tensioning system oil pressure gauge measurement accuracy compensation methods introduced above.

[0080] It should be noted that the above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A method for compensating the measurement accuracy of an oil pressure gauge in a tensioning system, characterized in that: The following steps are involved: Based on the obtained product information and service environment temperature of the jack, a simulation model of the jack is constructed, and based on the simulation model, a steady-state temperature inside the jack is obtained; Acquire multiple sets of measured data when the jack is working, and construct an oil pressure gauge measurement error compensation model based on the multiple sets of measured data, wherein the measured data includes the pressure input of the oil pressure gauge, the pressure output of the oil pressure gauge and the steady-state temperature inside the jack; The oil pressure gauge reading is temperature compensated based on the oil pressure gauge measurement error compensation model to obtain the pressure input of the oil pressure gauge when the jack is working in real time.

2. A method for compensating the measurement accuracy of an oil pressure gauge of a tensioning system according to claim 1, characterized in that: Construct an oil pressure gauge measurement error compensation model, including: The pressure input of the oil pressure gauge is taken as the dependent variable, and the pressure output of the oil pressure gauge and the steady-state temperature inside the jack are taken as the independent variables. Based on the multiple sets of measured data, an oil pressure gauge measurement error compensation model is constructed, and the corresponding calculation formula is: Where P represents the pressure input of the oil pressure gauge; α i,j-i represents the polynomial coefficient; U represents the pressure output of the oil pressure gauge; T represents the steady-state temperature inside the jack; n represents the model parameter.

3. A tensioning system oil pressure gauge measurement accuracy compensation method according to claim 2, characterized in that: The polynomial coefficients in the oil pressure gauge measurement error compensation model are determined using a least squares polynomial fitting method.

4. The method for compensating the measurement accuracy of the oil pressure gauge of the tensioning system according to claim 1 is characterized in that: A simulation model of the jack is built based on ANSYS software.

5. A method for compensating the measurement accuracy of an oil pressure gauge of a tensioning system according to claim 4, characterized in that: Before building a simulation model of the jack based on ANSYS software, it is also necessary to set the heat conduction boundary conditions.

6. A tensioning system oil pressure gauge measurement accuracy compensation method according to claim 5, characterized in that: The heat conduction boundary conditions at least include: a constant temperature boundary condition at the jack inlet, an axisymmetric condition at the jack bottom boundary, and a temperature wall function boundary condition at the fluid-solid contact surface.

7. The method for compensating the measurement accuracy of the oil pressure gauge of the tensioning system according to claim 1 is characterized in that: Temperature compensation is performed on the oil pressure gauge reading based on the oil pressure gauge measurement error compensation model to obtain the pressure input of the oil pressure gauge when the jack is working in real time, including: Get the pressure output of the oil pressure gauge when the jack is working in real time; Based on the simulation model, obtaining the steady-state temperature inside the jack when the jack is working in real time; The pressure output of the oil pressure gauge when the jack is working in real time and the steady-state temperature inside the jack are input into the oil pressure gauge measurement error compensation model, and the oil pressure gauge measurement error compensation model outputs the pressure input of the oil pressure gauge when the jack is working in real time.

8. The method for compensating the measurement accuracy of the oil pressure gauge of a tensioning system according to claim 1, characterized in that: The product information at least includes the geometric structure and material properties of the jack.

9. The method for compensating the measurement accuracy of the oil pressure gauge of the tensioning system according to claim 1, characterized in that: The method further includes: PDMS coating technology is used to set a colorless and transparent protective film on the surface of the oil gauge dial.

10. A tensioning system oil pressure gauge measurement accuracy compensation device, characterized in that: It comprises a memory, a processor and an executable computer program stored in the memory and runnable on the processor, wherein when the processor executes the computer program, a method for compensating the measurement accuracy of an oil pressure gauge of a tensioning system as claimed in any one of claims 1 to 9 is executed.

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