Cathode protection method and device for impressed current, storage medium and electronic device

Abstract

The invention discloses an impressed current cathode protection method and device, a storage medium, an electronic device and a computer program product, the method comprises the steps that a plurality of observation points are selected in a to-be-protected area of a to-be-protected metal structure, and the potentials of the observation points are used for indicating the potential distribution condition of the to-be-protected area; according to the surface area of the metal structure and the effective protection area of the anode blocks to be arranged, the number of the needed anode blocks is determined; and adjusting the arrangement positions of the plurality of anode blocks in the to-be-protected area and the anode currents of the plurality of anode blocks according to the potential conditions of the plurality of observation points, so that the potential distribution condition of the to-be-protected area meets a preset optimization target. By adjusting the arrangement position of the anode block and the anode current of the anode block, the potential distribution condition of the to-be-protected area is more uniform, the more uniform the potential distribution condition of the to-be-protected area is, the better the cathode protection effect is, and therefore the protection effect on the to-be-protected metal structure is improved.

Description

Technical Field

[0001] The present application relates to the field of cathodic protection, and more specifically, to a cathodic protection method and device of impressed current, a storage medium, an electronic device, and a computer program product. Background Art

[0002] With the rapid development of science and technology, more and more underwater devices have emerged in order to utilize marine resources. Underwater steel structures such as offshore platforms, hulls and submarine pipelines are usually exposed to harsh marine environments and are susceptible to electrochemical corrosion. Therefore, it is necessary to take anti-corrosion measures for underwater steel structures.

[0003] In the related art, impressed current cathodic protection (ICCP) strategy is usually adopted to perform anti-corrosion protection of metals, which provides a protection current to the protected metal structure through the anode block, thereby inhibiting the corrosion process of the metal structure (cathode).

[0004] However, the cathodic protection effect of the related art is not good. Summary of the invention

[0005] Embodiments of the present application provide an impressed current cathodic protection method and apparatus, a storage medium, an electronic device, and a computer program product.

[0006] According to one aspect of an embodiment of the present application, a cathodic protection method of impressed current is provided, the method comprising: selecting a plurality of observation points in a protected area of ​​a metal structure to be protected, wherein the potentials of the plurality of observation points are used to indicate a potential distribution in the protected area; determining the required number of anode blocks according to the surface area of ​​the metal structure and an effective protection area of ​​the anode blocks to be arranged; and adjusting the arrangement positions of the plurality of anode blocks in the protected area and the anode currents of the plurality of anode blocks according to the potentials of the plurality of observation points, so that the potential distribution in the protected area meets a preset optimization target.

[0007] In an exemplary embodiment, the arrangement positions of the multiple anode blocks in the area to be protected and the anode currents of the multiple anode blocks are adjusted according to the potential conditions of the multiple observation points so that the potential distribution of the area to be protected meets a preset optimization target, including: establishing a potential distribution function according to the target potential and actual potential of the multiple observation points, and the target current density and actual current density of the multiple anode blocks; and adjusting the arrangement positions of the multiple anode blocks in the area to be protected and the anode currents of the multiple anode blocks according to the potential distribution function so that the potential distribution function reaches a preset optimization target, wherein the optimization target is to minimize the deviation between the actual potentials of the multiple observation points and the corresponding target potentials, and to minimize the deviation between the actual current density of the multiple anode blocks and the corresponding target current density.

[0008] In an exemplary embodiment, the selecting of multiple observation points in the protected area of ​​the metal structure to be protected includes: determining the maximum points and minimum points of the current density in the protected area, multiple geometric boundary points and geometric center points of the protected area, and high potential gradient points of the protected area; and selecting multiple points as the multiple observation points from the maximum points and minimum points of the current density in the protected area, multiple geometric boundary points and geometric center points of the protected area, and high potential gradient points of the protected area.

[0009] In an exemplary embodiment, the shape of the anode block is a regular polygon or a sphere.

[0010] In an exemplary embodiment, after adjusting the arrangement positions of the multiple anode blocks in the area to be protected and the anode currents of the multiple anode blocks according to the potential conditions of the multiple observation points so that the potential distribution of the area to be protected meets a preset optimization target, the cathodic protection method of impressed current also includes: acquiring the actual potentials of the multiple observation points; determining the potential deviation based on the actual potentials of the multiple observation points and the corresponding target potentials; and adjusting the anode currents of the multiple anode blocks to reduce the potential deviation.

[0011] In an exemplary embodiment, adjusting the anode current of the plurality of anode blocks to reduce the potential deviation includes: inputting the potential deviation into a pre-established potential dynamic model of the area to be protected, determining the current adjustment amount of the plurality of anode blocks, wherein the potential dynamic model is used to indicate the relationship between the anode current of the plurality of anode blocks and the potential of the plurality of observation points; using the current adjustment amount of the plurality of anode blocks, adjusting the anode current of the corresponding anode blocks to reduce the potential deviation.

[0012] According to another aspect of the embodiment of the present application, there is also provided an impressed current cathodic protection device, the device comprising:

[0013] An observation point selection module, used to select a plurality of observation points in a protected area of ​​the metal structure to be protected, wherein the potentials of the plurality of observation points are used to indicate the potential distribution of the protected area;

[0014] an anode block quantity determination module, used to determine the required number of anode blocks according to the surface area of ​​the metal structure and the effective protection area of ​​the anode blocks to be arranged;

[0015] The anode block parameter determination module is used to adjust the arrangement positions of the multiple anode blocks in the protected area and the anode currents of the multiple anode blocks according to the potential conditions of the multiple observation points, so that the potential distribution of the protected area meets the preset optimization target.

[0016] According to another aspect of the embodiment of the present application, a computer-readable storage medium is provided, in which a computer program is stored, wherein the computer program is configured to execute the above-mentioned cathodic protection method of impressed current when running.

[0017] According to another aspect of an embodiment of the present application, an electronic device is also provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the cathodic protection method of impressed current through the computer program.

[0018] According to another aspect of the embodiments of the present application, a computer program product is provided, including a computer program, and when the computer program is executed by a processor, the steps of the method described in each embodiment of the present application are implemented.

[0019] The above-mentioned impressed current cathodic protection method and device, storage medium, electronic device, and computer program product, the impressed current cathodic protection method, firstly selects multiple observation points in the protected area of ​​the metal structure to be protected, and the potentials of the multiple observation points are used to indicate the potential distribution of the protected area, so that the potential distribution of the protected area can be accurately determined, which is convenient for the subsequent determination of the protection effect of the anode block. Then, according to the surface area of ​​the metal structure and the effective protection area of ​​the anode blocks to be arranged, the number of anode blocks required is determined, so as to preliminarily determine the number of anode blocks required, and the protection range of the anode blocks needs to at least cover the surface area of ​​the metal structure. Finally, according to the potential conditions of the multiple observation points, the arrangement positions of the multiple anode blocks in the protected area and the anode currents of the multiple anode blocks are adjusted so that the potential distribution of the protected area meets the preset optimization target, that is, by adjusting the arrangement positions of the anode blocks and the anode currents of the anode blocks, the potential distribution of the protected area is made more uniform, and the more uniform the potential distribution of the protected area is, the better the cathodic protection effect is, thereby improving the protection effect of the metal structure to be protected. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 It is a hardware structure block diagram of the impressed current cathodic protection method of the embodiment of the present application;

[0023] Figure 2 is a flow chart of an impressed current cathodic protection method according to an embodiment of the present application;

[0024] Figure 3 This is a second flow chart of an impressed current cathodic protection method according to an embodiment of the present application;

[0025] Figure 4 This is a third flow chart of an impressed current cathodic protection method according to an embodiment of the present application;

[0026] Figure 5 This is a fourth flow chart of an impressed current cathodic protection method according to an embodiment of the present application;

[0027] Figure 6 This is a fifth flow chart of an impressed current cathodic protection method according to an embodiment of the present application;

[0028] Figure 7 It is a structural block diagram of a cathodic protection device of an impressed current according to an embodiment of the present application. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, the process, method, system, product or equipment comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0031] The method embodiments provided in the embodiments of the present application can be executed in a computer terminal or a similar computing device. Taking running on a computer terminal as an example, Figure 1 1 is a hardware structure block diagram of a computer terminal of the cathode protection method of impressed current in the embodiment of the present application. Figure 1 As shown, the computer terminal may include one or more ( Figure 1 Only one is shown in the figure) processor 102 (processor 102 may include but is not limited to a microprocessor (Microprocessor Unit, referred to as MPU) or a programmable logic device (Programmable logic device, referred to as PLD)) and a memory 104 for storing data. In an exemplary embodiment, the above-mentioned computer terminal may also include a transmission device 106 for communication functions and an input and output device 108. It can be understood by ordinary technicians in this field that Figure 1 The structure shown is only for illustration and does not limit the structure of the above-mentioned computer terminal. Figure 1More or fewer components as shown, or with Figure 1 Equivalent functions or comparisons shown Figure 1 A different configuration with more features is shown.

[0032] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the cathodic protection method of impressed current in the embodiment of the present application. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, to implement the above method. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories may be connected to the computer terminal via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0033] The transmission device 106 is used to receive or send data via a network. The specific example of the above network may include a wireless network provided by a communication provider of a computer terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 can be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0034] In this embodiment, an impressed current cathodic protection method is provided. Figure 2 1 is a flow chart of an optional impressed current cathodic protection method according to an embodiment of the present application, the flow chart comprising the following steps S200-S220:

[0035] Step S200: selecting a plurality of observation points in a protected area of ​​a metal structure to be protected.

[0036] Among them, the potentials of multiple observation points are used to indicate the potential distribution of the area to be protected. The selected multiple observation points can be distributed at different positions in the area to be protected. The multiple observation points are spread over the area to be protected, that is, the observation areas of the multiple observation points are combined to cover the entire area to be protected, so that the potentials of the multiple observation points can represent the potentials of different positions in the area to be protected, and then the potential distribution of the area to be protected can be obtained based on the potentials of the multiple observation points.

[0037] Step S210, determining the required number of anode blocks according to the surface area of ​​the metal structure and the effective protection area of ​​the anode blocks to be arranged.

[0038] Among them, the effective protection area of ​​the anode block can be determined first, for example, by the following formula:

[0039]

[0040] Among them, S eff is the effective protection area of ​​the anode block, I a is the anode current, σ is the conductivity of seawater, and K is a constant that reflects the influence of anode shape, material and environmental conditions.

[0041] Then according to the total surface area A of the metal structure and the effective protection area S of the anode block eff , preliminarily estimate the number of anode blocks Where n is the number of anode blocks. Thus, the number of anode blocks required is determined to ensure that the effective protection areas of multiple anode blocks can cover the total surface area of ​​the entire metal structure when superimposed.

[0042] Step S220, adjusting the arrangement positions of the plurality of anode blocks in the area to be protected and the anode currents of the plurality of anode blocks according to the potential conditions of the plurality of observation points, so that the potential distribution of the area to be protected meets a preset optimization target.

[0043] It should be noted that the principle of cathodic protection by arranging anode blocks is based on the galvanic reaction mechanism of electrochemical corrosion. In electrolyte environments such as seawater, metal structures (such as hulls and pipelines) will corrode. This is due to the potential difference between different areas on the metal surface, which leads to galvanic corrosion. Under natural conditions, tiny primary cells are formed on the metal surface, some of which act as anodes and release electrons (oxidation reactions occur), while other areas act as cathodes and absorb electrons (reduction reactions occur). The corrosion of metals is actually the process of metals losing electrons and becoming metal ions. Through the impressed current cathodic protection (ICCP) technology, anode blocks can be arranged on the metal surface, and an impressed current can be applied to the metal structure. The direction of this current is opposite to the direction of the current in the natural corrosion process, that is, the electrons flow from the anode to the metal structure (cathode). It can slow down or offset the tendency of metals to lose electrons in the natural corrosion process. The metal structure accepts electrons and is protected, slowing down or stopping the corrosion process.

[0044] Specifically, the potential distribution of the area to be protected can be determined based on the potential conditions of multiple observation points. After adjusting the arrangement positions of multiple anode blocks in the area to be protected and the anode currents of multiple anode blocks, the potential distribution of the area to be protected will change. Therefore, the potential conditions of multiple observation points can be used to determine whether the potential distribution of the area to be protected meets the preset optimization target. The arrangement positions of multiple anode blocks in the area to be protected and the anode currents of multiple anode blocks are continuously adjusted until the potential distribution of the area to be protected meets the preset optimization target.

[0045] Among them, the preset optimization target can be that the potential conditions of multiple observation points all meet the corresponding target potential conditions. The target potential condition of each observation point can be a predetermined potential condition that can make the potential distribution of the area to be protected uniform. Therefore, when the potential distribution of the area to be protected meets the preset optimization target, it means that the potential distribution of the area to be protected is uniform, and uniform cathodic protection can be achieved, avoiding over-protection or under-protection of local areas, and the protection effect is better.

[0046] In this embodiment, firstly, multiple observation points are selected in the protected area of ​​the metal structure to be protected, and the potentials of the multiple observation points are used to indicate the potential distribution of the protected area, so that the potential distribution of the protected area can be accurately determined, which is convenient for the subsequent determination of the protection effect of the anode block. Then, according to the surface area of ​​the metal structure and the effective protection area of ​​the anode blocks to be arranged, the number of anode blocks required is determined, so as to preliminarily determine the number of anode blocks required, and the protection range of the anode blocks needs to at least cover the surface area of ​​the metal structure. Finally, according to the potential conditions of the multiple observation points, the arrangement positions of the multiple anode blocks in the protected area and the anode currents of the multiple anode blocks are adjusted so that the potential distribution of the protected area meets the preset optimization target, that is, by adjusting the arrangement positions of the anode blocks and the anode currents of the anode blocks, the potential distribution of the protected area is made more uniform, and the more uniform the potential distribution of the protected area is, the better the cathodic protection effect is, thereby improving the protection effect of the metal structure to be protected.

[0047] In one embodiment, Figure 3 As shown, step S220, according to the potential conditions of multiple observation points, adjust the arrangement positions of multiple anode blocks in the area to be protected and the anode currents of multiple anode blocks, so that the potential distribution of the area to be protected meets the preset optimization target. It includes: steps S300-S310. Among them:

[0048] Step S300, establishing a potential distribution function according to the target potentials and actual potentials of multiple observation points, and the target current densities and actual current densities of multiple anode blocks.

[0049] Among them, the potential distribution function can be shown as follows:

[0050]

[0051] Among them, V ref is the target potential, V j is the actual potential of the jth observation point. ref is the target current density of the anode block, I i is the actual current density of the ith anode block, I ref This is achieved by comprehensively considering anode distribution, current overlap, structural characteristics and environmental conditions.

[0052] The potential distribution function can be used to determine the deviations between the actual potentials of multiple observation points and the target potentials, and the deviations between the actual current densities of multiple anode blocks and the target current density, at the current arrangement positions of multiple anode blocks.

[0053] The entire area to be protected can be divided into several small areas by using a triangular mesh division method, and the center of each area is the candidate arrangement point of the anode block.

[0054] Step S310, adjusting the arrangement positions of the plurality of anode blocks in the area to be protected and the anode currents of the plurality of anode blocks according to the potential distribution function, so that the potential distribution function reaches a preset optimization target.

[0055] The optimization goal is to minimize the deviation between the actual potential of multiple observation points and the corresponding target potential, and minimize the deviation between the actual current density of multiple anode blocks and the corresponding target current density. That is, the optimization function can be expressed as:

[0056]

[0057] The variables are the arrangement positions of the multiple anode blocks and the anode current of each anode block, namely:

[0058] {(x i ,y i ,z i ,I i )|i=1,2,...,n}

[0059] Among them, x i ,y i ,z i are the three-dimensional coordinates of the i-th anode block, I i is the anode current of the ith anode block, and the number of anode blocks is n. Minimizing the optimization function means finding a set of multiple anode block layout positions and anode currents {(x i ,y i ,z i,I i )|i=1,2,...,n}, so that the actual potential of multiple observation points is as close to the target potential as possible, and the actual current density of each anode block is as close to the target current density as possible, that is, the current output of multiple anode blocks is as uniform as possible. Thus, the layout position of the anode blocks and the anode current can be optimized to achieve more efficient and uniform cathodic protection of underwater structures.

[0060] A multi-objective optimization algorithm based on particle swarm optimization (PSO) and adaptive genetic algorithm (AGA) can be introduced to gradually adjust the specific position of each anode until the objective function reaches the minimum value. This process takes into account the optimization of the number and layout of anodes at the same time.

[0061] In this embodiment, a potential distribution function is first established, and then the layout positions and anode currents of multiple anode blocks are adjusted under the optimization target, thereby determining the optimal layout positions and anode currents of multiple anode blocks and achieving more efficient cathodic protection.

[0062] In one embodiment, Figure 4 As shown, step S200, selecting a plurality of observation points in the protected area of ​​the metal structure to be protected. The method includes steps S400-S410.

[0063] Step S400, determining the maximum and minimum points of the current density in the area to be protected, multiple geometric boundary points and geometric center points of the area to be protected, and high potential gradient points of the area to be protected.

[0064] Among them, the six-point distribution optimization principle can be used in this application to optimize the anode layout position. The six-point distribution optimization principle is a method for optimizing the layout of multi-anode arrays, aiming to achieve uniform distribution of surface current on underwater structures, thereby improving the effect of impressed current cathodic protection. The core idea of ​​this principle is to select six key observation points in the protection area, and then optimize the layout of the anodes according to the potential changes of these points. Six observation points can be selected, including:

[0065] Multiple geometric boundary points of the area to be protected, such as the four corner points of the area to be protected: For example, for a cuboid, select the four vertex points (x min ,y min ,z min ), (x max ,y min ,z min ), (x min ,ymax ,z min ), (x max ,y max ,z max ),in, are the minimum values ​​of the three-dimensional coordinates in the area to be protected, x max ,y max ,z max are the maximum values ​​of the three-dimensional coordinates in the area to be protected.

[0066] The geometric center point of the area to be protected. Select a point (x c ,y c ,z c ),in

[0067] High potential gradient point, select a point in the area where the potential gradient changes the most. This point can be estimated through previous simulation or experimental data, and is usually located near the boundary or in the area of ​​shape mutation.

[0068] In addition to the above six points, the maximum and minimum points of current density can also be selected as observation points.

[0069] Step S410, selecting multiple points as multiple observation points from the maximum and minimum points of the current density in the area to be protected, multiple geometric boundary points and geometric center points of the area to be protected, and high potential gradient points of the area to be protected.

[0070] In this embodiment, multiple points are selected as multiple observation points from the maximum and minimum points of the current density in the area to be protected, multiple geometric boundary points and geometric center points of the area to be protected, and high potential gradient points of the area to be protected, so as to ensure that the selected multiple observation points can represent the potential conditions of the area to be protected, and then the potential distribution of the area to be protected can be accurately determined, which facilitates the subsequent accurate optimization of the layout positions and anode currents of multiple anode blocks according to the potential distribution, thereby achieving more efficient cathodic protection.

[0071] In one embodiment, the shape of the anode block is a regular polygon or a sphere.

[0072] In this embodiment, the shape of the anode block is a regular polygon such as a hexagon, which can enhance the uniformity of current distribution. The use of polygonal anode blocks makes the current distribution more uniform underwater, reduces the local overpotential phenomenon, and further improves the stability and reliability of the cathodic protection system, which is particularly suitable for the protection of large underwater metal structures. The shape of the anode block is spherical, which can improve the efficiency of current diffusion. The spherical anode block has a larger surface area, can diffuse the current more effectively, and reduce the current density, which is suitable for the protection of metal structures with complex underwater environments and large current demands.

[0073] In one embodiment, Figure 5 As shown, after step S220, the impressed current cathodic protection method further includes steps S500-S520. Among them:

[0074] Step S500, obtaining actual potentials of multiple observation points.

[0075] Among them, potential sensors and current sensors can be used to monitor the potentials of multiple observation points in real time to determine the current distribution of the structure to be protected.

[0076] Step S510, determining a potential deviation according to actual potentials of a plurality of observation points and corresponding target potentials.

[0077] Among them, the potential error e(t)=V can be calculated based on the monitoring data of the sensor ref -V(t), where V ref is the target potential, and V(t) is the actual potential measured.

[0078] Step S520, adjusting the anode currents of the plurality of anode blocks to reduce the potential deviation.

[0079] Among them, the potential deviation can be reduced by adjusting the anode current of multiple anode blocks. The formula is as follows:

[0080] u(t)=u0-Δu(t)

[0081] Wherein, u(t) is the anode current of the anode block after adjustment, u0 is the anode current of the anode block before adjustment, and Δu(t) is the adjustment amount.

[0082] In this embodiment, the potential state of the structure to be protected is measured in real time, and the current output of the anode block is dynamically adjusted to cope with the dynamic changes of the underwater environment and the changes of the structural potential. This method can significantly improve the efficiency and stability of the cathodic protection system and is suitable for the protection of various underwater metal structures, such as offshore platforms, underwater pipelines and submarines.

[0083] In one embodiment, Figure 6As shown, step S520, adjusting the anode current of multiple anode blocks to reduce the potential deviation. It includes: steps S600-S610. Among them:

[0084] Step S600: input the potential deviation into a pre-established potential dynamic model of the area to be protected, and determine the current adjustment amounts of the plurality of anode blocks.

[0085] Among them, the potential dynamic model is used to indicate the relationship between the anode current of multiple anode blocks and the potential of multiple observation points. A dynamic mathematical model of the protection area can be established, and the model parameters can be estimated in real time using an adaptive identification method. The model parameters are estimated online using the recursive least squares method or the Kalman filter algorithm.

[0086] Specifically, the cathodic protection system of underwater structures must first be modeled, which usually involves knowledge in fields such as electrochemistry, fluid mechanics, and materials science. The model needs to be able to describe the dynamic changes in current and potential in the impressed current cathodic protection (ICCP) system, as well as their relationship with factors such as anode position, current output, and seawater properties (such as conductivity, temperature, and salinity).

[0087] Through adaptive identification, the model can automatically adjust its parameters based on real-time data to better fit the behavior of the actual system. This usually involves online learning algorithms that update the model parameters as new data is collected.

[0088] Alternatively, we can use recursive least squares, a commonly used parameter estimation method that is particularly suitable for online estimation because it can recursively use new data to update parameters. In this method, the estimation of model parameters is based on minimizing the sum of squared errors between observed data and model predictions. As new data is added, recursive least squares will continuously update the parameter estimates to reflect the latest data information.

[0089] In cathodic protection systems, Kalman filtering can be used to estimate model parameters and take into account measurement noise and process noise. The key steps of Kalman filtering include two stages: prediction and update. In the prediction stage, the state and parameters of the system are predicted based on the model dynamics; in the update stage, new measurement data is used to correct the prediction to obtain more accurate parameter estimates.

[0090] Step S610 , using the current adjustment amounts of the plurality of anode blocks, adjusting the anode currents of the corresponding anode blocks to reduce the potential deviation.

[0091] Among them, the current adjustment amount of the anode block can be determined by the following formula: As the adaptive adjustment amount, the parameters α and β are determined dynamically through the potential dynamic model according to the real-time data.

[0092] In this embodiment, a potential dynamic model of the area to be protected can be established, and the control parameters of the model can be dynamically adjusted according to real-time monitoring data to cope with complex changes in the marine environment and structural potential changes. Then, the potential dynamic model can be used to accurately determine the current adjustment amount, so that the current output of the anode block can be dynamically adjusted to respond to changes in the marine environment (such as salinity, temperature and water flow rate) and potential monitoring data in real time, thereby achieving more accurate and efficient cathodic protection.

[0093] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods of each embodiment of the present application.

[0094] In this embodiment, an impressed current cathodic protection device is also provided, and the impressed current cathodic protection device is used to implement the above-mentioned embodiments and preferred embodiments, and the descriptions that have been made will not be repeated. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0095] Figure 7 1 is a structural block diagram of an optional impressed current cathodic protection device according to an embodiment of the present application. Figure 7 As shown, including:

[0096] The observation point selection module 701 is used to select a plurality of observation points in the protected area of ​​the metal structure to be protected, wherein the potentials of the plurality of observation points are used to indicate the potential distribution of the protected area.

[0097] The anode block quantity determination module 702 is used to determine the required number of anode blocks according to the surface area of ​​the metal structure and the effective protection area of ​​the anode blocks to be arranged.

[0098] The anode block parameter determination module 703 is used to adjust the arrangement positions of the multiple anode blocks in the area to be protected and the anode currents of the multiple anode blocks according to the potential conditions of the multiple observation points, so that the potential distribution of the area to be protected meets the preset optimization target.

[0099] Through the above device, firstly, multiple observation points are selected in the protected area of ​​the metal structure to be protected, and the potentials of the multiple observation points are used to indicate the potential distribution of the protected area, so that the potential distribution of the protected area can be accurately determined, which is convenient for the subsequent determination of the protection effect of the anode block. Then, according to the surface area of ​​the metal structure and the effective protection area of ​​the anode blocks to be arranged, the number of anode blocks required is determined, so as to preliminarily determine the number of anode blocks required, and the protection range of the anode blocks needs to at least cover the surface area of ​​the metal structure. Finally, according to the potential conditions of the multiple observation points, the arrangement positions of the multiple anode blocks in the protected area and the anode currents of the multiple anode blocks are adjusted so that the potential distribution of the protected area meets the preset optimization target, that is, by adjusting the arrangement positions of the anode blocks and the anode currents of the anode blocks, the potential distribution of the protected area is made more uniform, and the more uniform the potential distribution of the protected area is, the better the cathodic protection effect is, thereby improving the protection effect of the metal structure to be protected.

[0100] In an exemplary embodiment, the anode block parameter determination module 703 further includes:

[0101] The function establishment unit is used to establish a potential distribution function according to the target potential and actual potential of multiple observation points and the target current density and actual current density of multiple anode blocks.

[0102] The optimization unit is used to adjust the layout positions of multiple anode blocks in the protected area and the anode currents of multiple anode blocks according to the potential distribution function, so that the potential distribution function reaches a preset optimization target, wherein the optimization target is to minimize the deviation between the actual potentials of multiple observation points and the corresponding target potentials, and to minimize the deviation between the actual current density of multiple anode blocks and the corresponding target current density.

[0103] In an exemplary embodiment, the observation point selection module 701 includes:

[0104] The observation point determination unit is used to determine the maximum and minimum points of the current density in the area to be protected, multiple geometric boundary points and geometric center points of the area to be protected, and high potential gradient points of the area to be protected.

[0105] The observation point selection unit is used to select multiple points as multiple observation points from the maximum and minimum points of the current density in the area to be protected, multiple geometric boundary points and geometric center points of the area to be protected, and high potential gradient points of the area to be protected.

[0106] In an exemplary embodiment, the above device further includes:

[0107] The potential acquisition module is used to obtain the actual potential of multiple observation points.

[0108] The potential deviation determination module is used to determine the potential deviation according to the actual potentials of multiple observation points and the corresponding target potentials.

[0109] The potential adjustment module is used to adjust the anode current of multiple anode blocks to reduce the potential deviation.

[0110] In an exemplary embodiment, the potential adjustment module is further used to input the potential deviation into a pre-established potential dynamic model of the area to be protected, and determine the current adjustment amount of the multiple anode blocks, wherein the potential dynamic model is used to indicate the relationship between the anode current of the multiple anode blocks and the potential of the multiple observation points. The current adjustment amounts of the multiple anode blocks are used to adjust the anode current of the corresponding anode blocks to reduce the potential deviation.

[0111] An embodiment of the present application further provides a storage medium, which includes a stored program, wherein the program executes any of the above methods when it is run.

[0112] Optionally, in this embodiment, the storage medium may be configured to store program codes for executing the following steps:

[0113] S1, selecting a plurality of observation points in a protected area of ​​a metal structure to be protected, wherein the potentials of the plurality of observation points are used to indicate a potential distribution of the protected area.

[0114] S2, determining the required number of anode blocks according to the surface area of ​​the metal structure and the effective protection area of ​​the anode blocks to be arranged.

[0115] S3, adjusting the arrangement positions of the plurality of anode blocks in the area to be protected and the anode currents of the plurality of anode blocks according to the potential conditions of the plurality of observation points, so that the potential distribution of the area to be protected meets a preset optimization target.

[0116] An embodiment of the present application further provides an electronic device, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0117] Optionally, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor, and the input / output device is connected to the processor.

[0118] Optionally, in this embodiment, the processor may be configured to perform the following steps through a computer program:

[0119] S1, selecting a plurality of observation points in a protected area of ​​a metal structure to be protected, wherein the potentials of the plurality of observation points are used to indicate a potential distribution of the protected area.

[0120] S2, determining the required number of anode blocks according to the surface area of ​​the metal structure and the effective protection area of ​​the anode blocks to be arranged.

[0121] S3, adjusting the arrangement positions of the plurality of anode blocks in the area to be protected and the anode currents of the plurality of anode blocks according to the potential conditions of the plurality of observation points, so that the potential distribution of the area to be protected meets a preset optimization target.

[0122] Optionally, in this embodiment, the above-mentioned storage medium may include but is not limited to: a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and other media that can store program codes.

[0123] An embodiment of the present application further provides a computer program product, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores the computer program product, and when the computer program is executed by a processor, the steps of the method in each embodiment of the present application are implemented.

[0124] Optionally, in this embodiment, the above computer program may be configured to implement the following steps when executed by a processor:

[0125] S1, selecting a plurality of observation points in a protected area of ​​a metal structure to be protected, wherein the potentials of the plurality of observation points are used to indicate a potential distribution of the protected area.

[0126] S2, determining the required number of anode blocks according to the surface area of ​​the metal structure and the effective protection area of ​​the anode blocks to be arranged.

[0127] S3, adjusting the arrangement positions of the plurality of anode blocks in the area to be protected and the anode currents of the plurality of anode blocks according to the potential conditions of the plurality of observation points, so that the potential distribution of the area to be protected meets a preset optimization target.

[0128] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation modes, and this embodiment will not be described in detail here.

[0129] Obviously, those skilled in the art should understand that the above modules or steps of the present application can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, and optionally, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order from that herein, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present application is not limited to any specific combination of hardware and software.

[0130] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the principles of the present application shall be included in the protection scope of the present application.

Claims

1. A cathodic protection method of impressed current, characterized in that: The method comprises: Selecting a plurality of observation points in the protected area of ​​the metal structure to be protected, wherein the potentials of the plurality of observation points are used to indicate the potential distribution of the protected area; Determining the number of anode blocks required according to the surface area of ​​the metal structure and the effective protection area of ​​the anode blocks to be arranged; According to the potential conditions of the multiple observation points, the arrangement positions of the multiple anode blocks in the area to be protected and the anode currents of the multiple anode blocks are adjusted so that the potential distribution of the area to be protected meets the preset optimization target.

2. The method according to claim 1, characterized in that The adjusting, according to the potential conditions of the plurality of observation points, the arrangement positions of the plurality of anode blocks in the area to be protected and the anode currents of the plurality of anode blocks so that the potential distribution of the area to be protected meets a preset optimization target comprises: Establishing a potential distribution function according to the target potentials and actual potentials of the plurality of observation points, and the target current densities and actual current densities of the plurality of anode blocks; According to the potential distribution function, the arrangement positions of the multiple anode blocks in the protected area and the anode currents of the multiple anode blocks are adjusted so that the potential distribution function reaches a preset optimization target, wherein the optimization target is to minimize the deviation between the actual potentials of the multiple observation points and the corresponding target potentials, and to minimize the deviation between the actual current density of the multiple anode blocks and the corresponding target current density.

3. The method according to claim 1, characterized in that The step of selecting a plurality of observation points in the protected area of ​​the metal structure to be protected comprises: Determine the maximum and minimum points of the current density in the area to be protected, multiple geometric boundary points and geometric center points of the area to be protected, and high potential gradient points of the area to be protected; A plurality of points are selected as the plurality of observation points from the maximum and minimum points of the current density in the area to be protected, the plurality of geometric boundary points and the geometric center point of the area to be protected, and the high potential gradient points of the area to be protected.

4. The method according to claim 1, characterized in that: The shape of the anode block is a regular polygon or a sphere.

5. The method according to claim 1, characterized in that After adjusting the arrangement positions of the plurality of anode blocks in the area to be protected and the anode currents of the plurality of anode blocks according to the potential conditions of the plurality of observation points so that the potential distribution of the area to be protected meets a preset optimization target, the method further includes: Acquiring actual potentials of the plurality of observation points; Determining a potential deviation according to actual potentials of the plurality of observation points and corresponding target potentials; The anode currents of the plurality of anode blocks are adjusted to reduce the potential deviation.

6. The method according to claim 5, characterized in that The adjusting the anode current of the plurality of anode blocks to reduce the potential deviation comprises: Inputting the potential deviation into a pre-established potential dynamic model of the area to be protected to determine the current adjustment amount of the plurality of anode blocks, wherein the potential dynamic model is used to indicate the relationship between the anode current of the plurality of anode blocks and the potential of the plurality of observation points; The current adjustment amounts of the plurality of anode blocks are used to adjust the anode currents of the corresponding anode blocks to reduce the potential deviation.

7. An impressed current cathodic protection device, characterized in that: The device comprises: An observation point selection module, used to select a plurality of observation points in a protected area of ​​the metal structure to be protected, wherein the potentials of the plurality of observation points are used to indicate the potential distribution of the protected area; an anode block quantity determination module, used to determine the required number of anode blocks according to the surface area of ​​the metal structure and the effective protection area of ​​the anode blocks to be arranged; The anode block parameter determination module is used to adjust the arrangement positions of the multiple anode blocks in the protected area and the anode currents of the multiple anode blocks according to the potential conditions of the multiple observation points, so that the potential distribution of the protected area meets the preset optimization target.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein the program executes the method according to any one of claims 1 to 6 when executed.

9. An electronic device comprising a memory and a processor, characterized in that: A computer program is stored in the memory, and the processor is configured to execute the method according to any one of claims 1 to 6 through the computer program.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

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