An electrochemical field equalization method based on distributed multi-potential control

Abstract

The present application relates to a kind of electrochemical field equalization methods based on distributed multi-potential control, in the method, by being laid out multiple potential measuring electrodes and auxiliary anode on the surface of vehicle, the potential measuring electrode is used to measure vehicle surface potential signal, and the dynamic average value is obtained by weighting the signal of each potential measuring electrode;Electrochemical field equalization equipment outputs current to auxiliary anode according to preset control algorithm.Electrochemical field equalization equipment dynamically regulates the output current of auxiliary anode of each channel according to the real-time feedback potential measuring electrode signal, until the vehicle surface potential is equalized or the preset value is achieved, so as to realize the electric field protection, corrosion protection of vehicle.The present application is suitable for the field of electrochemical field characteristic control and corrosion protection of underwater vehicle, improves the operational efficiency and vitality of underwater vehicle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrochemical field control of underwater targets, corrosion protection and the like, and particularly relates to a method for electrochemical field control and corrosion protection of underwater vehicles. BACKGROUND

[0002] Underwater vehicles are an important part of ship and ocean engineering equipment, and will play an important role in the fields of marine environment monitoring, marine resource exploration, marine scientific research, underwater warning and security, etc. However, in complex marine environments, corrosion problems are prominent due to the electrochemical action of dissimilar metal components, which seriously affects the operational efficiency and service life of medium and large underwater vehicles with metal components as the main structure.

[0003] In order to solve the corrosion problem of underwater vehicles, protective treatments such as coating protection, cathodic protection, and material antifouling are usually performed on the main materials. Since the last century, major marine powers in the world have begun to explore the evolution mechanism and protection measures of the electrochemical field of underwater vehicles. The US military proposed the concept of self-healing protection in the 1980s and subsequently applied it to ship protection. Currently, Russia adopts similar methods to the United States for the electrochemical field protection of underwater vehicles. In areas with high fluid scouring, self-healing coatings are used for protection; for parts such as propellers, cathodic protection is used for protection.

[0004] However, traditional protection methods such as self-healing coatings and cathodic protection cannot achieve balanced control of the electrochemical field, and inevitably result in over-protection (damage to the coating, requiring regular inspection and dry-docking maintenance) or under-protection (damage to the steel components, requiring regular maintenance and replacement of severely damaged parts), combined with corrosion protection current leakage, resulting in complex electrochemical corrosion reactions on the surface of the underwater vehicle, generating various macroscopic or microscopic electrochemical currents or potential differences, forming an electrochemical field.

[0005] The electrochemical field generation process of underwater vehicles is coupled with corrosion behaviors such as galvanic corrosion, crevice corrosion, and pitting corrosion, exacerbating the localized corrosion of underwater vehicles; at the same time, the 0.01 Hz-1 Hz electrochemical characteristic signals emitted during the electrochemical field generation process and the 0.5 Hz-20 Hz propeller characteristic signals generated by the propeller modulation are easily captured or identified by high-sensitivity electrochemical field detectors, leading to the failure of underwater vehicle missions.

[0006] China started late in the field of electrochemical field protection and application of underwater vehicles, and is generally lagging behind the advanced level of foreign countries in terms of the formation law and evolution mechanism of the electrochemical field, data accumulation of protection means, and engineering application.

[0007] The application provides an electrochemical field balancing method based on distributed multi-potential control, which can effectively control the surface potential of an underwater vehicle, realize balanced control of the electrochemical field of the underwater vehicle, reduce the surface potential of the vehicle to the protection potential, reduce the risk of underwater corrosion of the vehicle, and reduce the characteristics of the electrochemical field of the vehicle to improve the operation efficiency and vitality of the underwater vehicle. SUMMARY

[0008] The application aims to provide an electrochemical field balancing method based on distributed multi-potential control. A plurality of potential measuring electrodes and auxiliary anodes are distributed on the surface of a vehicle. The potential measuring electrodes are used to measure the surface potential signals of the vehicle, and the dynamic average value is obtained by weighting the signals of the potential measuring electrodes. The electrochemical field balancing device outputs current to the auxiliary anodes according to a preset control algorithm. The electrochemical field balancing device dynamically regulates the output current of the auxiliary anodes of each channel according to the real-time feedback of the potential measuring electrode signals until the surface potential of the vehicle is balanced or a preset value is achieved, so as to realize the electric field protection and corrosion protection of the vehicle.

[0009] The specific technical scheme of the application is as follows: an electrochemical field balancing method based on distributed multi-potential control, characterized in that the method comprises:

[0010] Step 1: a plurality of potential measuring electrodes and auxiliary anodes are arranged at intervals on the surface of a target vehicle. Each auxiliary anode corresponds to a controlled area of the vehicle, and each controlled area is provided with a dynamic regulation channel.

[0011] Step 2: start the electrochemical field balancing device, switch all channels to the constant current output mode, and output a constant current to each dynamic regulation channel.

[0012] Step 3: the potential measuring electrodes are used to measure the potential signals at different positions on the surface of the vehicle, and the weighted average potential is obtained by weighting the signals of the potential measuring electrodes.

[0013] Step 4: the electrochemical field balancing device determines the total output current output to each dynamic regulation channel based on the weighted average potential according to a preset control algorithm. ;

[0014] Step 5: the electrochemical field balancing device outputs corresponding currents to the auxiliary anodes of each dynamic regulation channel according to the determined total output current and a preset proportion matrix.

[0015] In a preferred implementation, the step 4 comprises: calculating the total output current according to the potential dynamic average value according to a preset control algorithm; determining the proportion coefficient of each channel, and determining the output current of each output channel based on the proportion coefficient and control the output.

[0016] In another preferred implementation, the method further comprises dynamically regulating the auxiliary anode output current of each channel according to the real-time feedback potential measurement electrode signal until the surface potential of the vehicle is balanced or reaches a preset value, thereby achieving the electric field protection and corrosion protection of the vehicle.

[0017] In another preferred implementation, step 4 comprises constructing a scaled-down model according to the structure of the target ship, and arranging a plurality of potential measurement electrodes and equivalent auxiliary anodes at the same positions of the scaled-down model,

[0018] A set of electrochemical field test sensors are arranged at predetermined positions of the physical scaled-down model of the mother ship, to test the electrochemical field characteristics of the physical scaled-down model,

[0019] The channel scaling factor of each channel is set to 1, The channel scaling factor is adjusted in sequence according to the test value by testing the electrochemical field characteristics of the physical scaled-down model,

[0020] The electrochemical field characteristics of the physical scaled-down model are tested again, and if the expected value is met, the output channel scaling factor is recorded as the default scaling factor, otherwise, the output channel scaling factor is adjusted in sequence again according to the test value .

[0021] In another preferred implementation, the weighted average potential The calculation method is as follows:

[0022] (1)

[0023] Wherein, M is the number of output channels of the electrochemical field balancing device and the number of auxiliary anodes, which are equal;

[0024] is the weighting coefficient of the nth channel.

[0025] In another preferred implementation, the total output current of step 4 has the following preset control algorithm:

[0026] (2)

[0027] Wherein, is the proportional coefficient in the feedback control algorithm, is the integral coefficient in the feedback control algorithm.

[0028] In another preferred implementation, the output current of each output channel of the electrochemical field balancing device in step 5​ The preset control algorithm is as follows:

[0029] (3)

[0030] in, This is the default scaling factor for each output channel of the electrochemical field equalization device, where m is the output channel number, m=1...k.

[0031] The electrochemical field equalization method based on distributed multi-potential control proposed in this invention has the following advantages:

[0032] (1) By adopting a distributed arrangement of potential measurement electrodes and auxiliary anodes, comprehensive underwater potential information of the vehicle can be obtained, and precise control of the electrochemical field can be achieved.

[0033] (2) Collect multi-potential signals as control input, adopt proportional-integral feedback algorithm, calculate the electrochemical field characteristics of the surface of the aircraft in real time, and dynamically adjust the output current parameters to achieve electrochemical equilibrium of the aircraft and high control accuracy.

[0034] (3) Electrochemical field equilibrium can simultaneously achieve electrochemical field characteristic control and surface corrosion protection of the vehicle, thereby improving the operational efficiency and survivability of underwater vehicles. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the electrochemical field equilibrium control process based on distributed multipotential control proposed in this invention.

[0036] Figure 2 This is a schematic diagram of the electrochemical field equilibrium principle based on distributed multipotential control proposed in this invention.

[0037] Figure 3 This describes the electrochemical field generation process and its typical characteristic signals.

[0038] Figure 4 The electrochemical field X component curve when the equalization method of this invention is not used for testing;

[0039] Figure 5 The X-component curve of the electrochemical field is shown when the equalization method of the present invention is used for testing. Detailed Implementation

[0040] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0041] The electrochemical field equalization method based on distributed multipotential control in this invention generally includes:

[0042] Multiple potential measuring electrodes and auxiliary anodes are deployed on the surface of the aircraft. The potential measuring electrodes measure the potential signal on the surface of the aircraft, and the signals from each potential measuring electrode are weighted to obtain a dynamically weighted average value. An electrochemical field equalization device outputs current to the auxiliary anodes according to a preset control algorithm. The electrochemical field equalization device dynamically adjusts the output current of the auxiliary anodes in each channel based on the real-time feedback of the potential measuring electrode signals until the potential on the surface of the aircraft is equalized or reaches the desired value, thereby achieving electric field protection and corrosion protection for the aircraft.

[0043] Specifically, the electrochemical field equalization method based on distributed multi-potential control according to embodiments of the present invention includes the following steps:

[0044] Step 1: Arrange multiple potential measurement electrodes and auxiliary anodes at intervals on the surface of the target vehicle. Each auxiliary anode corresponds to a controlled area of ​​the vehicle, and each controlled area is equipped with a dynamic control channel.

[0045] Step 2: Start the electrochemical field equalization equipment and switch all output channels to constant current output mode to output a constant current to each dynamic control channel.

[0046] Step 3: Measure the potential signals at different locations on the surface of the aircraft using potential measuring electrodes. (where n is the serial number of the potential measuring electrode, n=1...k).

[0047] Step 4: Calculate the weighted average potential of each channel's potential signal according to the preset algorithm. According to the average potential The total output current is calculated based on a preset control algorithm and a weighted average potential. .

[0048] Step 5: Calculate the output current of each output channel of the electrochemical field equalization device according to the preset equalization output current algorithm. And control the output of the auxiliary anode.

[0049] Step 6: Based on the surface potential signal of the aircraft fed back from the potential measuring electrodes. The mean square error of the surface potential of the aircraft is calculated to determine whether the electrochemical field potential on the surface of the aircraft is balanced. If the mean square error meets the expected value or the surface potential signal... If the desired protection potential range is reached, proceed to step 7; otherwise, continue with step 3 until the surface potential signal of the spacecraft is reached. The requirements are met.

[0050] Step 7: Once the electrochemical field potential on the surface of the aircraft reaches equilibrium, the output current adjustment stops, and the electrochemical field equalization device continues to output the current value described in Step 5.

[0051] The weighted average potential in step 4 The calculation method is as follows:

[0052] (1)

[0053] Where M represents the number of output channels and auxiliary anodes of the electrochemical field equalization device;

[0054] The weighting coefficient for the nth channel is related to the building materials, sea valves, outer surface coating materials and processes of the aircraft. It can be obtained through experimental experience or through aircraft test data.

[0055] The total output current in step 5 The preset control algorithm is as follows:

[0056] (2)

[0057] in, This refers to the proportional coefficient in the feedback control algorithm. The integral coefficients in the feedback control algorithm. These two coefficients are related to the aircraft's structural parameters, construction materials, and construction techniques, and can be obtained through simulation testing or experience.

[0058] In step 6, the output current of each output channel of the electrochemical field equalization device The preset control algorithm is as follows:

[0059] (3)

[0060] in, This represents the default proportional gain for each output channel of the electrochemical field equalization device, where m is the channel number (m=1...k). It is related to the vehicle's structural parameters, construction materials, and the location of auxiliary anodes, and can be obtained through experimental testing.

[0061] Proportional coefficients of each output channel of the electrochemical field equalization device The determination method is as follows:

[0062] During the design and construction phase:

[0063] 1) Conduct electrochemical field tests using a physical scaled-down model of the mother ship. Referring to the auxiliary anode arrangement position of the aircraft, arrange M equivalent auxiliary anodes at the equivalent positions of the scaled-down model.

[0064] 2) At a distance of 1.5 times the beam of the physical scale model of the parent ship, a set of electrochemical field test sensors were set up to test the electrochemical field characteristics of the physical scale model.

[0065] 3) Adjust the scaling factor for each channel. The initial value was set to 1. By testing the electrochemical field characteristics of the physical scale-down model, the channel scaling factor was adjusted sequentially based on the test values. .

[0066] 4) Test the electrochemical field characteristics of the physical scale-down model again. If the expected values ​​are met, record the scaling factor of each output channel. This serves as the default scaling factor. Otherwise, adjust the scaling factor of each output channel sequentially based on the test values. .

[0067] During the shipboard testing phase of the aircraft, the proportional coefficients of each output channel were measured by testing the underwater electrochemical field data of the aircraft. Make appropriate minor adjustments.

[0068] test

[0069] Referring to "CB 20774-2021 Test Method for Electric Field Characteristics of Scaled-Down Models", the electrochemical field characteristics of the scaled-down model of the underwater vehicle before and after adopting the electrochemical field equalization method were tested as follows: Figures 4-5 As shown. Simulation tests were conducted in seawater, with and without an equilibrium field. The comparison results of the electrochemical fields before and after equilibrium are as follows:

[0070]

[0071] Figure 4 The characteristics of the electrochemical field in the scaled-down model before adopting the equilibrium method; Figure 5 The electrochemical field characteristics after balancing measures were implemented are shown. Comparison reveals that the peak-to-peak value of the electrochemical field of the underwater vehicle decreased by more than 68% after balancing measures were taken. The electrochemical field characteristics on the scaled-down model of the underwater vehicle are relatively small, and by setting parameters, preset protection values ​​can be achieved, effectively improving its survivability.

[0072] This invention is not limited to the specific embodiments described above. Those skilled in the art can implement this invention using various other specific embodiments based on the disclosed content of the embodiments and accompanying drawings. Therefore, any design that adopts the design structure and concept of this invention and makes some simple changes or modifications falls within the protection scope of this invention.

Claims

1. An electrochemical field equalization method based on distributed multi-potential control, characterized in that, The method includes: Step 1: Arrange multiple potential measurement electrodes and auxiliary anodes at intervals on the surface of the target vehicle. Each auxiliary anode corresponds to a controlled area of ​​the vehicle, and each controlled area is equipped with a dynamic control channel. Step 2: Start the electrochemical field equalization equipment and switch all channels to constant current output mode to output a constant current to each dynamically controlled channel; Step 3: Measure the potential signals at different locations on the surface of the aircraft using potential measuring electrodes, and obtain a weighted average potential by weighting the signals from each potential measuring electrode. ; Step 4: The electrochemical field equalization device determines the total output current to each dynamic control channel based on the preset control algorithm and the weighted average potential. ; Step 5: The electrochemical field equalization equipment adjusts the total output current as determined. And a preset proportional matrix outputs corresponding current to the auxiliary anodes of each dynamic control channel.

2. The electrochemical field equalization method based on distributed multi-potential control according to claim 1, characterized in that, Step 4 includes: calculating the weighted average potential. The total output current is calculated according to the preset control algorithm. Determine the scaling factor for each channel, and based on the scaling factor, determine the output current of each output channel. And control the output.

3. The electrochemical field equalization method based on distributed multi-potential control according to claim 2, characterized in that, The method also includes dynamically adjusting the auxiliary anode output current of each channel according to the real-time feedback potential measurement electrode signal until the surface potential of the aircraft is balanced or reaches a preset value, thereby achieving electric field protection and corrosion protection for the aircraft.

4. The electrochemical field equalization method based on distributed multi-potential control according to claim 2, characterized in that, Step 4 includes constructing a scaled-down model based on the structure of the target ship, and then arranging multiple potential measuring electrodes and equivalent auxiliary anodes at intervals in the same positions on the scaled-down model. A set of electrochemical field testing sensors was deployed at a predetermined location relative to the physical scale model of the parent submarine to test the electrochemical field characteristics of the physical scale model. The scaling factor of each channel The initial value was set to 1. By testing the electrochemical field characteristics of the physical scale-down model, the channel scaling factor was adjusted sequentially based on the test values. , The electrochemical field characteristics of the physical scale-down model were tested again. If the expected values ​​were met, the scaling factor of each output channel was recorded. As the default scaling factor, otherwise, adjust the scaling factor of each output channel sequentially based on the test values. .

5. The electrochemical field equalization method based on distributed multi-potential control according to claim 4, characterized in that, The weighted average potential The calculation method is as follows: （1）； Where M represents the number of output channels and the number of auxiliary anodes of the electrochemical field equalization device, and the two are equal; is the weighting coefficient for the nth channel.

6. The electrochemical field equalization method based on distributed multi-potential control according to claim 5, characterized in that, Total output current in step 4 The preset control algorithm is as follows: （2）； in, This refers to the proportional coefficient in the feedback control algorithm. Integral coefficients in feedback control algorithms.

7. The electrochemical field equalization method based on distributed multi-potential control according to claim 6, characterized in that, In step 5, the output current of each output channel of the electrochemical field equalization device The preset control algorithm is as follows: （3）； in, This is the default scaling factor for each output channel of the electrochemical field equalization device, where m is the output channel number, m=1...k.

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