Device, method and device for monitoring dissolved oxygen in reinforced concrete and medium

Abstract

The invention provides monitoring equipment, method and device for dissolved oxygen in reinforced concrete and a medium, the dissolved oxygen monitoring equipment is arranged in the reinforced concrete, the reinforced concrete is soaked in seawater, and the equipment comprises a sleeve; the reference electrode, the auxiliary electrode and the working electrode are positioned in the sleeve; the electrolyte gel is filled in the sleeve; the porous membrane layer is attached to the surface of the auxiliary electrode, the porous membrane layer comprises an inner membrane layer, an outer membrane layer and a middle membrane layer, the inner membrane layer and the outer membrane layer are made of corrosion-resistant metal or carbon fiber materials, and the middle membrane layer is an oxygen permeable membrane. According to the technical scheme of the embodiment of the invention, the middle film layer is protected through the inner film layer and the outer film layer, so that the middle film layer cannot be deformed due to extrusion of gravel, and the long-term stability of the internal environment of the dissolved oxygen monitoring equipment is ensured through the water-retaining property and hygroscopicity of the electrolyte gel, so that the service life of the dissolved oxygen monitoring equipment is prolonged. Therefore, the dissolved oxygen detection equipment can obtain the dissolved oxygen content in the reinforced concrete.

Description

Technical Field

[0001] The invention relates to the technical field of dissolved oxygen content monitoring, and in particular to equipment and method, a device and a medium for monitoring dissolved oxygen inside reinforced concrete. Background Art

[0002] Oxygen content is a key factor affecting the speed of steel corrosion in reinforced concrete structures. Since the oxygen content in the seawater immersion area is constantly changing, it is necessary to monitor the dissolved oxygen content inside the reinforced concrete structure located in the seawater immersion area in real time to analyze the impact of the dissolved oxygen content inside the reinforced concrete structure on the corrosion condition of the steel bars.

[0003] At present, oxygen sensors are installed on the outer surface of reinforced concrete to detect the dissolved oxygen content outside the reinforced concrete. The oxygen sensor includes an anode, a semipermeable membrane and a liquid electrolyte. The dissolved oxygen content in seawater is analyzed based on the current value obtained by electrolytic reduction of oxygen at the anode. However, the oxygen sensor installed on the outside of the reinforced concrete cannot accurately obtain the dissolved oxygen content of the environment in which the steel bars are located, resulting in errors in the analysis of steel bar corrosion based on the dissolved oxygen content. If the oxygen sensor is installed inside the concrete, the oxygen sensor is easily damaged due to sand and gravel squeezing during the pouring of the reinforced concrete, resulting in deformation of the semipermeable membrane and loss of liquid electrolyte, and the oxygen sensor cannot be used normally. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a dissolved oxygen monitoring device and method, apparatus and medium inside reinforced concrete, which can obtain the dissolved oxygen content inside the reinforced concrete.

[0005] In a first aspect, an embodiment of the present invention provides a dissolved oxygen monitoring device inside reinforced concrete, wherein the dissolved oxygen monitoring device is arranged inside reinforced concrete, and the reinforced concrete is immersed in seawater, and the dissolved oxygen monitoring device comprises: Sleeve; A reference electrode, an auxiliary electrode and a working electrode, wherein the reference electrode, the auxiliary electrode and the working electrode are located inside the sleeve; An electrolyte gel filled in the sleeve; A porous membrane layer is attached to the surface of the auxiliary electrode, and the porous membrane layer includes an inner membrane layer, an outer membrane layer and an intermediate membrane layer. The inner membrane layer and the outer membrane layer are made of corrosion-resistant metal or carbon fiber material, and the intermediate membrane layer is an oxygen-permeable membrane.

[0006] According to some embodiments of the present invention, the working electrode is a stainless steel electrode, the reference electrode is a silver electrode, a silver chloride electrode, a titanium mesh electrode or a saturated calomel electrode, and the auxiliary electrode is a graphite electrode, a stainless steel electrode or a titanium mesh electrode; The dissolved oxygen monitoring device also includes a temperature electrode, a pH electrode and a conductivity electrode. The temperature electrode, the pH electrode and the conductivity electrode are located inside the sleeve. The temperature electrode is a thermistor. The material of the pH electrode is iridium oxide. The material of the conductivity electrode is graphite.

[0007] According to some embodiments of the present invention, components of the electrolyte gel include colloid and an electrolyte solution, the colloid includes at least one of agar, cellulose and acrylamide, and components of the electrolyte solution include potassium chloride, sodium chloride and lithium chloride.

[0008] In a second aspect, an embodiment of the present invention provides a method for monitoring dissolved oxygen in reinforced concrete, which is applied to the device for monitoring dissolved oxygen in reinforced concrete in the first aspect, and the method comprises: Turning on the dissolved oxygen monitoring device, operating the reference electrode, the working electrode and the auxiliary electrode, and acquiring first current density data, wherein the first current density data is the current density data of the working electrode; Inputting the first current density data into a pre-trained dissolved oxygen content monitoring model, wherein the dissolved oxygen content monitoring model obtains a dissolved oxygen content monitoring result based on the first current density data; A corrosion risk assessment will be performed based on the dissolved oxygen content monitoring results to obtain the steel bar corrosion risk level.

[0009] According to some embodiments of the present invention, the dissolved oxygen monitoring device further comprises: a temperature electrode, a pH electrode and a conductivity electrode, wherein the temperature electrode, the pH electrode and the conductivity electrode are located inside the sleeve, the temperature electrode is a thermistor, the material of the pH electrode is iridium oxide, and the material of the conductivity electrode is graphite; After starting the dissolved oxygen monitoring device, the method further includes: The temperature electrode, the pH electrode and the conductivity electrode work to determine the temperature signal based on the resistance value of the thermistor, the pH signal based on the current value of the pH electrode, and the salinity signal based on the current value of the conductivity electrode; The dissolved oxygen content monitoring model obtains the temperature signal, the pH signal and the salinity signal, and generates the dissolved oxygen content monitoring result based on the first current density data, the temperature signal, the pH signal and the salinity signal.

[0010] According to some embodiments of the present invention, before inputting the first current density data into a pre-trained dissolved oxygen content monitoring model, the process includes: Placing the reference electrode, the working electrode and the auxiliary electrode in a monitoring environment with the same temperature, salinity and pH but different oxygen contents, applying a constant potential to the working electrode, and obtaining a plurality of oxygen content data and a plurality of second current density data corresponding to the oxygen content data; Performing linear fitting on all the oxygen content data and all the second current density data to generate an initial mapping curve, wherein the second current density data is the current density data of the working electrode; Based on the initial mapping curve, the dissolved oxygen content monitoring model is obtained through an adaptive enhanced ensemble learning framework and SHAP interpretability analysis.

[0011] According to some embodiments of the present invention, based on the initial mapping curve, the dissolved oxygen content monitoring model is obtained through an adaptive enhanced integrated learning framework and SHAP interpretability analysis, including: Placing the reference electrode, the working electrode and the auxiliary electrode in a monitoring environment with different temperatures, different salinities and different pH values ​​and a constant oxygen content, obtaining the third current density data, cleaning, filtering and normalizing the third current density data, and dividing the third current density data into training set data and test set data; The training set data is trained based on the initial mapping curve through an adaptive enhanced ensemble learning framework and SHAP interpretability analysis to obtain an initial monitoring model; The initial monitoring model is evaluated by using the training set data and the test set data to obtain an evaluation result. When the evaluation result meets a preset condition, the dissolved oxygen content monitoring model is determined based on the initial monitoring model through SHAP interpretability analysis.

[0012] According to some embodiments of the present invention, determining the dissolved oxygen content monitoring model based on the initial monitoring model through SHAP interpretability analysis includes: Analyzing the initial monitoring model through SHAP interpretability analysis to obtain a SHAP value bar chart and a SHAP value dependency graph, and evaluating the correlation between the third current density data, the temperature signal, the pH signal, and the salinity signal and the initial monitoring result based on the SHAP value bar chart and the SHAP value dependency graph, respectively, wherein the evaluation result includes the initial monitoring result; When the third current density data has the highest correlation with the initial monitoring result, obtaining the importance ranking of the third current density data, the temperature signal, the pH signal, and the salinity signal based on the SHAP value bar graph and the SHAP value dependency graph; Based on the importance ranking, the characteristic weights of the third current density data, the temperature signal, the pH signal and the salinity signal are determined respectively, and all the characteristic weights are assigned to the initial monitoring model to obtain the dissolved oxygen content monitoring model.

[0013] In a third aspect, an embodiment of the present invention provides a dissolved oxygen monitoring device inside reinforced concrete, comprising at least one control processor and a memory for communicating with the at least one control processor; the memory stores instructions executable by the at least one control processor, and the instructions are executed by the at least one control processor so that the at least one control processor can execute the dissolved oxygen monitoring method inside reinforced concrete as described in the second aspect above.

[0014] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the method for monitoring dissolved oxygen inside reinforced concrete as described in the second aspect above.

[0015] According to the embodiment of the present invention, the dissolved oxygen monitoring device inside the reinforced concrete is arranged inside the reinforced concrete, and the reinforced concrete is immersed in seawater, and has at least the following beneficial effects: sleeve; reference electrode, auxiliary electrode and working electrode, the reference electrode, the auxiliary electrode and the working electrode are located inside the sleeve; electrolyte gel, the electrolyte gel is filled inside the sleeve; porous membrane layer, the porous membrane layer is attached to the surface of the auxiliary electrode, the porous membrane layer includes an inner membrane layer, an outer membrane layer and an intermediate membrane layer, the inner membrane layer and the outer membrane layer are made of corrosion-resistant metal or carbon fiber material, and the intermediate membrane layer is an oxygen-permeable membrane. According to the technical solution of the embodiment of the present invention, the inner membrane layer and the outer membrane layer provide protection for the intermediate membrane layer, so that the intermediate membrane layer will not be deformed by the extrusion of sand and gravel during concrete pouring, and the long-term stability of the internal environment of the dissolved oxygen monitoring device is guaranteed by the water retention and hygroscopicity of the electrolyte gel, so that the dissolved oxygen detection device can work normally inside the reinforced concrete, so that the accurate dissolved oxygen content of the environment where the steel bar is located can be obtained inside the reinforced concrete, and the accuracy of the analysis of the steel bar corrosion based on the dissolved oxygen content is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a structural diagram of a dissolved oxygen monitoring device provided by one embodiment of the present invention; Figure 2is a flow chart of a dissolved oxygen monitoring method provided by another embodiment of the present invention; Figure 3 It is a constant potential polarization curve in an oxygen content monitoring device provided by another embodiment of the present invention, using stainless steel as a working electrode, a titanium mesh as a reference electrode, and stainless steel as an auxiliary electrode; Figure 4 It is a mapping relationship diagram between current density and oxygen content in an oxygen content monitoring device using stainless steel as a working electrode, a titanium mesh as a reference electrode, and stainless steel as an auxiliary electrode provided by another embodiment of the present invention; Figure 5 is a scatter plot of monitoring performance evaluation of an adaptive enhanced regression model provided by another embodiment of the present invention; Figure 6 is a SHAP value bar chart provided by another embodiment of the present invention; Figure 7 is a SHAP value dependency graph provided by another embodiment of the present invention; Figure 8 It is a structural diagram of a dissolved oxygen monitoring device provided in another embodiment of the present invention. DETAILED DESCRIPTION

[0017] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0018] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0019] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0020] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0021] According to the embodiment of the present invention, the dissolved oxygen monitoring device inside the reinforced concrete is arranged inside the reinforced concrete, and the reinforced concrete is immersed in seawater, and has at least the following beneficial effects: sleeve; reference electrode, auxiliary electrode and working electrode, the reference electrode, the auxiliary electrode and the working electrode are located inside the sleeve; electrolyte gel, the electrolyte gel is filled inside the sleeve; porous membrane layer, the porous membrane layer is attached to the surface of the auxiliary electrode, the porous membrane layer includes an inner membrane layer, an outer membrane layer and an intermediate membrane layer, the inner membrane layer and the outer membrane layer are made of corrosion-resistant metal or carbon fiber material, and the intermediate membrane layer is an oxygen-permeable membrane. According to the technical solution of the embodiment of the present invention, the inner membrane layer and the outer membrane layer provide protection for the intermediate membrane layer, so that the intermediate membrane layer will not be deformed by the extrusion of sand and gravel during concrete pouring, and the long-term stability of the internal environment of the dissolved oxygen monitoring device is guaranteed by the water retention and hygroscopicity of the electrolyte gel, so that the dissolved oxygen detection device can work normally inside the reinforced concrete, so that the accurate dissolved oxygen content of the environment where the steel bar is located can be obtained inside the reinforced concrete, and the accuracy of the analysis of the steel bar corrosion based on the dissolved oxygen content is improved.

[0022] First, refer to Figure 1 , Figure 1 : is a structural diagram of a dissolved oxygen monitoring device. The dissolved oxygen monitoring device inside reinforced concrete provided in an embodiment of the present application is arranged inside reinforced concrete, and the reinforced concrete is immersed in seawater, and includes: Sleeve 10; A reference electrode 20, an auxiliary electrode 30 and a working electrode 40, wherein the reference electrode 20, the auxiliary electrode 30 and the working electrode 40 are located inside the sleeve 10; Electrolyte gel 50, the electrolyte gel 50 is filled in the interior of the sleeve 10; The porous membrane layer 60 is attached to the surface of the auxiliary electrode 30 . The porous membrane layer 60 includes an inner membrane layer, an outer membrane layer and an intermediate membrane layer. The inner membrane layer and the outer membrane layer are made of corrosion-resistant metal or carbon fiber material, and the intermediate membrane layer is an oxygen-permeable membrane.

[0023] It should be noted that the reference electrode 20, the auxiliary electrode 30 and the working electrode 40 are used to obtain the dissolved oxygen content based on the current density by the three-electrode electrochemical method. The auxiliary electrode 30 is the anode, and the electrode reaction equation of the auxiliary electrode is: 2 +2H 2 O+4e - → 4OH - , the working electrode 40 is the cathode, and the electrode reaction equation of the working electrode is H 2 O+Cl - -2e - → ClO- +2H + The present application does not make any improvements to the three-electrode electrochemical method, and no further details will be given here.

[0024] It should be noted that, in the process of preparing the electrolyte gel 50 and filling the electrolyte gel 50 into the sleeve 10, the electrolyte gel 50 is prepared and filled by vacuum negative pressure or ultrasound to remove the residual gas inside the electrolyte gel 50. After the reference electrode 20, the auxiliary electrode 30 and the working electrode 40 are arranged inside the sleeve 10, the electrolyte gel 50 is filled into the sleeve 10.

[0025] It should be noted that the present application replaces the traditional solution-form electrolyte with a gel-form electrolyte. The electrolyte gel 50 has good water retention and hygroscopicity, which can ensure the long-term stability of the internal environment of the dissolved oxygen monitoring device. The gel-form electrolyte will not be damaged by the extrusion during the concrete pouring process, causing the electrolyte solution to be lost, resulting in the oxygen sensor being unable to be used normally.

[0026] It should be noted that the middle membrane layer is an oxygen permeable membrane, and the material of the oxygen permeable membrane is polytetrafluoroethylene. This application has not made any form of improvement to the material of the oxygen permeable membrane, so it will not be elaborated here. The inner membrane layer and the middle membrane layer, and the middle membrane layer and the outer membrane layer are combined by vacuum adsorption or edge coating of adhesive. The inner membrane layer and the outer membrane layer of this application are made of corrosion-resistant metal or carbon fiber materials. The corrosion-resistant metal or carbon fiber materials have high hardness and are resistant to seawater corrosion, which improves the overall strength of the porous membrane layer 60 and can provide installation space and protection for the middle membrane layer; during the pouring of concrete, the dissolved oxygen monitoring equipment is placed in the concrete, and the inner membrane layer and the outer membrane layer provide protection for the middle membrane layer to prevent the middle membrane layer from being squeezed by sand and gravel in the concrete, thereby preventing the middle membrane layer from being damaged and damaged. At the same time, the inner membrane layer and the outer membrane layer play a fixing role for the middle membrane layer, slowing down the aging and deformation of the middle membrane layer during subsequent use, and effectively improving the service life of the middle membrane layer.

[0027] It should be noted that the existing oxygen sensors are easily damaged. If they are installed inside reinforced concrete, the fragile oxygen sensors cannot be replaced at any time, resulting in the inability to monitor the environment in which the steel bars of the reinforced concrete are located. If they are installed on the surface of reinforced concrete, the accurate dissolved oxygen content of the environment in which the steel bars are located cannot be obtained.

[0028] It should be noted that reinforced concrete structures such as immersed tube tunnels and bridge piers are located in the seawater immersion area, and the oxygen content in the seawater immersion area is constantly changing; the dissolved oxygen monitoring device of the present application is placed inside the concrete during the pouring of the concrete, and the inner membrane layer and the outer membrane layer provide a working space for the middle membrane layer to prevent the middle membrane layer from being squeezed by sand and gravel; the electrolyte gel 50 of the present application can better maintain the internal environment of the dissolved oxygen monitoring device stable. The dissolved oxygen monitoring device of the present application has better pressure resistance and stability, and is not easy to be damaged in the reinforced concrete structure, so it can accurately obtain the dissolved oxygen content of the environment where the steel bars are located inside the reinforced concrete.

[0029] It should be noted that the dissolved oxygen monitoring equipment of the present application is placed inside the concrete during the pouring process of the concrete; when the reinforced concrete structure is located in a full seawater immersion area, the dissolved oxygen monitoring equipment works, and the reference electrode 20, the auxiliary electrode 30 and the working electrode 40 obtain the current density of the working electrode 40, and the internal dissolved oxygen content of the reinforced concrete structure located in the full seawater immersion area is determined based on the current density of the working electrode 40, so as to facilitate the subsequent analysis of the dissolved oxygen content to obtain the steel corrosion risk level.

[0030] In addition, in one embodiment, referring to Figure 1 The working electrode 40 is a stainless steel electrode, the reference electrode 20 is a silver electrode, a silver chloride electrode, a titanium mesh electrode or a saturated calomel electrode, and the auxiliary electrode 30 is a graphite electrode, a stainless steel electrode or a titanium mesh electrode; the dissolved oxygen monitoring equipment also includes a temperature electrode 70, a pH electrode 80 and a conductivity electrode 90, the temperature electrode 70, the pH electrode 80 and the conductivity electrode 90 are located inside the sleeve 10, the temperature electrode 70 is a thermistor, the material of the pH electrode 80 is iridium oxide, and the material of the conductivity electrode 90 is graphite.

[0031] It should be noted that stainless steel electrodes, titanium mesh electrodes, graphite electrodes, etc. are not easily corroded by seawater and are more sensitive to oxygen in the three-electrode chemical method. A more accurate prediction result of dissolved oxygen content can be obtained based on the working electrode 40 which is a stainless steel electrode, the reference electrode 20 which is a titanium mesh electrode or a saturated calomel electrode, and the auxiliary electrode 30 which is a graphite electrode, a stainless steel electrode or a titanium mesh electrode.

[0032] It should be noted that a temperature electrode 70, a pH electrode 80 and a conductivity electrode 90 are provided in the dissolved oxygen monitoring equipment. Based on the temperature signal obtained by the temperature electrode 70, the pH signal obtained by the pH electrode 80, the salinity signal obtained by the conductivity electrode 90 and the current density of the working electrode, the synergistic effect of the seawater temperature, the pH value of the seawater and the chloride concentration of the seawater on the diffusion of dissolved oxygen is taken into account, so that the dissolved oxygen content determined by the dissolved oxygen monitoring device is more accurate.

[0033] It should be noted that based on the data obtained by the temperature electrode 70, the pH electrode 80 and the conductivity electrode 90 respectively, the seawater temperature, seawater pH value and seawater salinity of the environment in which the steel bars are located are obtained, and based on the current density of the working electrode 40, as well as the temperature, pH value and salinity of the seawater, the dissolved oxygen content of the environment in which the steel bars are located is obtained.

[0034] In addition, in one embodiment, referring to Figure 1 The components of the electrolyte gel 50 include colloid and electrolyte solution, the colloid includes at least one of agar, cellulose and acrylamide, and the components of the electrolyte solution include potassium chloride, sodium chloride and lithium chloride.

[0035] It should be noted that the hydrogel is prepared by at least one of agar, cellulose and acrylamide, and the hydrogel has water retention, thereby preserving the components of the electrolyte solution to prevent the loss of the electrolyte solution, thereby ensuring the stability of the internal environment of the dissolved oxygen monitoring device.

[0036] In addition, the embodiment of the present invention provides a method for monitoring dissolved oxygen in reinforced concrete, which is applied to Figure 1 The dissolved oxygen monitoring device inside the reinforced concrete of the embodiment shown in FIG. Figure 2 The method includes but is not limited to the following steps: S10, starting the dissolved oxygen monitoring device, the reference electrode, the working electrode and the auxiliary electrode working, and obtaining first current density data, wherein the first current density data is the current density data of the working electrode; S20, inputting the first current density data into a pre-trained dissolved oxygen content monitoring model, and the dissolved oxygen content monitoring model obtains a dissolved oxygen content monitoring result based on the first current density data; S30, a corrosion risk assessment will be conducted based on the dissolved oxygen content monitoring results to obtain the steel bar corrosion risk level.

[0037] It should be noted that the current density data of the working electrode is obtained, and the dissolved oxygen content is determined based on the current density data; based on the dissolved oxygen content, the corrosion risk analysis of the environment in which the steel bars in the reinforced concrete result are located is performed to obtain the steel bar corrosion feudal level. In this application, when the dissolved oxygen content is less than or equal to one part per million, the corrosion risk level of the steel bar is low risk; when the dissolved oxygen content is greater than one part per million and less than or equal to three parts per million, the corrosion risk level of the steel bar is medium risk; when the dissolved oxygen content is greater than or equal to three parts per million, the corrosion risk level of the steel bar is high risk.

[0038] In addition, in one embodiment, in S10, after the dissolved oxygen monitoring device is turned on, the following steps are specifically included but not limited to: S11, the temperature electrode, the pH electrode and the conductivity electrode work, the temperature signal is determined based on the resistance value of the thermistor, the pH signal is determined based on the current value of the pH electrode, and the salinity signal is determined based on the current value of the conductivity electrode; S12, the dissolved oxygen content monitoring model obtains the temperature signal, the pH signal and the salinity signal, and generates the dissolved oxygen content monitoring result based on the first current density data, the temperature signal, the pH signal and the salinity signal.

[0039] It should be noted that in order to take into account the synergistic effects of the seawater temperature, seawater pH and seawater salinity of the steel bar environment on the dissolved oxygen content, the dissolved oxygen content monitoring model generates dissolved oxygen content monitoring results based on the first current density data, temperature signal, pH signal and salinity signal to obtain more accurate dissolved oxygen content monitoring results, thereby outputting a more accurate steel bar corrosion risk level.

[0040] In addition, refer to Figure 3 and Figure 4 , Figure 3 This is the constant potential polarization curve in the oxygen content monitoring device with stainless steel as the working electrode, titanium mesh as the reference electrode, and stainless steel as the auxiliary electrode. Figure 4 The current density and oxygen content mapping relationship diagram of an oxygen content monitoring device using stainless steel as a working electrode, a titanium mesh as a reference electrode, and stainless steel as an auxiliary electrode. In one embodiment, in S20, before inputting the first current density data into a pre-trained dissolved oxygen content monitoring model, the following steps are specifically included but not limited to: S41, placing the reference electrode, the working electrode and the auxiliary electrode in a monitoring environment with the same temperature, the same salinity and the same pH but different oxygen contents, applying a constant potential to the working electrode, and obtaining a plurality of oxygen content data and a plurality of second current density data corresponding to the oxygen content data; S42, performing linear fitting on all oxygen content data and all second current density data to generate an initial mapping curve, wherein the second current density data is current density data of the working electrode; S43, based on the initial mapping curve, the dissolved oxygen content monitoring model was obtained through the adaptive enhanced ensemble learning framework and SHAP interpretability analysis.

[0041] It should be noted that the reference electrode, the working electrode and the auxiliary electrode are placed in a monitoring environment with the same temperature, the same salinity and the same pH and different oxygen contents, that is, only the oxygen content of the monitoring environment is controlled as a single variable. In order to construct a corresponding relationship between the second current density and the oxygen content. In the monitoring environment of this embodiment, the range of the oxygen content is 0 mg / L to 6 mg / L.

[0042] It should be noted that, referring to Figure 3 , Figure 3It is the constant potential polarization curve in the oxygen content monitoring device with stainless steel as the working electrode, titanium mesh as the reference electrode, and stainless steel as the auxiliary electrode, that is, the second current density data in this embodiment. Different concentrations of oxygen are introduced into the monitoring environment of this embodiment. After the dissolved oxygen content value of the detected environment is stabilized, the reference electrode, the working electrode and the auxiliary electrode are put into operation, and a constant potential polarization curve test is performed on the reference electrode, the working electrode and the auxiliary electrode; a constant potential voltage is applied to the working electrode, the constant potential voltage is -0.8 volts, and the current density data of the working electrode is collected at a frequency of 10 Hz, thereby obtaining a constant potential polarization curve under different oxygen contents. Based on Figure 3 It can be obtained that under stable constant potential application, when the oxygen content is constant, the current density of the working electrode reaches stability after 10 minutes, and the current density data of the working electrode when the constant potential polarization curve is stable under different oxygen contents are obtained, that is, the second current density data.

[0043] It should be noted that, refer to Figure 4 , Figure 4 This is a mapping relationship diagram of current density and oxygen content in an oxygen content monitoring device with stainless steel as the working electrode, titanium mesh as the reference electrode, and stainless steel as the auxiliary electrode, that is, the initial mapping curve in this embodiment. Construct a correspondence between multiple pairs of oxygen content and second current density data; based on the correspondence between multiple pairs of oxygen content and second current density data, establish an initial mapping curve, and the initial mapping curve is associated with the oxygen content and second current density data.

[0044] It should be noted that after obtaining the initial mapping curve, the determination coefficient R 2 Evaluate the relevance of the initial mapping curve, R 2 The closer the value of is to 1, the higher the correlation of the initial mapping curve is. 2 If the value of is less than the preset threshold, the correlation between the second current data and the oxygen content in the initial mapping curve is small, and the initial mapping curve is established again based on the correspondence between multiple pairs of oxygen content and second current density data. 2 Evaluating the correlation of the initial mapping curve is a prior art, and this application does not make any improvements thereto, so no further details will be given here.

[0045] It should be noted that, through the specific steps of this embodiment, the expression of the initial mapping curve of the dissolved oxygen monitoring device with stainless steel as the working electrode, titanium mesh as the reference electrode, and graphite as the auxiliary electrode is obtained under the environment of 25 degrees Celsius, pH of 7, and salinity of 0.1 molar is: , the first coefficient of determination is ; The initial mapping curve of the dissolved oxygen monitoring device with stainless steel as the working electrode, titanium mesh as the reference electrode, and stainless steel as the auxiliary electrode is , the second coefficient of determination is ; The initial mapping curve of the dissolved oxygen monitoring device with stainless steel as the working electrode, saturated calomel as the reference electrode, and titanium mesh as the auxiliary electrode is , the third coefficient of determination is ;in, The dissolved oxygen content is monitored by a dissolved oxygen monitoring device using stainless steel as the working electrode, titanium mesh as the reference electrode, and graphite as the auxiliary electrode. The dissolved oxygen content is monitored by a dissolved oxygen monitoring device using stainless steel as the working electrode, titanium mesh as the reference electrode, and stainless steel as the auxiliary electrode. The dissolved oxygen content is monitored by a dissolved oxygen monitoring device using stainless steel as the working electrode, saturated calomel as the reference electrode, and titanium mesh as the auxiliary electrode. , and The unit of is mg / L; i is the second current density data, the unit is microampere / square centimeter. , , It can be obtained that the current density in the dissolved oxygen monitoring device with stainless steel as the working electrode, titanium mesh as the reference electrode, and stainless steel as the auxiliary electrode has the strongest correlation with the oxygen content. Therefore, stainless steel is used as the working electrode, titanium mesh as the reference electrode, and stainless steel as the auxiliary electrode as the dissolved oxygen monitoring device placed inside reinforced concrete.

[0046] In addition, refer to Figure 5 , Figure 5 is a scatter plot of the prediction performance evaluation of the adaptive enhanced regression model. In one embodiment, in S43, specifically, the following steps are also included but not limited to: S431, placing the reference electrode, the working electrode, and the auxiliary electrode in a monitoring environment with different temperatures, different salinities, and different pH values ​​and a constant oxygen content, obtaining third current density data, cleaning, filtering, and normalizing the third current density data, and dividing the third current density data into training set data and test set data; S432, training the training set data based on the initial mapping curve through an adaptive enhanced ensemble learning framework and SHAP interpretability analysis to obtain an initial monitoring model; S433, the initial monitoring model is evaluated by using the training set data and the test set data to obtain an evaluation result. When the evaluation result meets the preset conditions, the dissolved oxygen content monitoring model is determined based on the initial monitoring model through SHAP interpretability analysis.

[0047] It should be noted that the oxygen content of the monitoring environment is always kept stable; when obtaining the correlation between the second current density data and the temperature, the salinity and pH of the monitoring environment are kept stable; when obtaining the correlation between the second current density data and the salinity, the temperature and pH of the monitoring environment are kept stable; when obtaining the correlation between the second current density data and the pH, the salinity and temperature of the monitoring environment are kept stable. In this embodiment, the temperature ranges from 10 degrees Celsius to 50 degrees Celsius, the pH ranges from pH=7 to pH=12, and the salinity ranges from 10.65 millisiemens / cm to 54.01 millisiemens / cm.

[0048] It should be noted that how to clean, filter and normalize data is an existing technology, and this application does not make any form of improvement thereto, so it will not be elaborated here.

[0049] It should be noted that the adaptive enhanced ensemble learning framework is the AdaBoost ensemble learning framework. How to train the training set data based on the mapping curve through the AdaBoost ensemble learning framework and SHAP interpretable analysis to obtain a model is a prior art. This application does not make any form of improvement to it, and will not go into details here.

[0050] It should be noted that the adaptive enhanced integrated learning framework and SHAP interpretable analysis can automatically calibrate the mapping relationship between current density and oxygen content according to ambient temperature, salinity, and alkalinity, thereby realizing the monitoring of oxygen content in complex dynamic environments and assessing the risk of steel bar corrosion.

[0051] It should be noted that, refer to Figure 5 , Figure 5 It is a scatter plot of the prediction performance evaluation of the adaptive enhanced regression model. The initial monitoring model is evaluated by the adaptive enhanced regression model through the training set data and the test set data, and the prediction performance evaluation scatter plot of the initial monitoring model is obtained. The evaluation result is obtained based on the scatter plot. When the scatter points obtained from the training set and the test set are densely distributed in the area near the dotted line, the distribution trend of the training set and the test set is consistent, indicating that the data division is reasonable and the deviation between the predicted value and the actual value is small. There is no obvious deviation in the test set, indicating that the training result of the initial monitoring model obtained by training the training set through the adaptive enhanced integrated learning framework and SHAP interpretability analysis is good.

[0052] It should be noted that based on the third current density data, the dissolved oxygen content detection model is determined through the adaptive enhanced integrated learning framework and SHAP interpretability analysis. The input data of the dissolved oxygen content detection model include the current density of the working electrode, temperature data, pH data and salinity data. The dissolved oxygen content detection model can consider the synergistic effect of temperature, pH and salinity on the dissolved oxygen content, so that the dissolved oxygen content obtained by the dissolved oxygen content detection model is more accurate, so that the corrosion risk level of the steel bar can be better determined based on the dissolved oxygen content.

[0053] In addition, in one embodiment, referring to Figure 6 and Figure 7 , Figure 6 is a bar chart of SHAP values, Figure 7 is a SHAP value dependency graph. In S433, a dissolved oxygen content monitoring model is determined based on the initial monitoring model through SHAP interpretability analysis, which specifically includes but is not limited to the following steps: S4331, analyzing the initial monitoring model through SHAP interpretability analysis to obtain a SHAP value bar graph and a SHAP value dependency graph, and evaluating the correlation between the third current density data, the temperature signal, the pH signal, and the salinity signal and the initial monitoring results based on the SHAP value bar graph and the SHAP value dependency graph, respectively, wherein the evaluation results include the initial monitoring results; S4332, when the third current density data has the highest correlation with the initial monitoring result, obtaining the importance ranking of the third current density data, the temperature signal, the pH signal, and the salinity signal based on the SHAP value bar graph and the SHAP value dependency graph; S4333, based on the importance ranking, the feature weights of the third current density data, temperature signal, pH signal and salinity signal are determined respectively, and all feature weights are assigned to the initial monitoring model to obtain a dissolved oxygen content monitoring model.

[0054] It should be noted that, refer to Figure 6 and Figure 7 , Figure 6 is a bar chart of SHAP values, Figure 7It is a SHAP value dependency graph. The SHAP value bar graph and SHAP value dependency graph are obtained through SHAP interpretability analysis to evaluate the correlation between the third current density data, temperature signal, pH signal and salinity signal and the initial monitoring results. In the SHAP value bar graph, the average SHAP value of the third current density data is the largest, that is, the third current density data has the highest correlation with the initial monitoring results, and the temperature signal, pH signal and salinity signal all have different weights on the initial monitoring results. When the third current density data has the highest correlation with the initial monitoring results, and the temperature signal, pH signal and salinity signal are correlated with the initial monitoring results, it is characterized that the initial monitoring model can take into account the multi-factor influence of temperature signal, pH signal and salinity signal on dissolved oxygen content, and the current density of the working electrode has the highest correlation with the initial monitoring results, ensuring that the current density of the working electrode is the most sensitive parameter for the dissolved oxygen content determined by the initial monitoring results.

[0055] It should be noted that the feature importance ranking of the third current density data, temperature signal, pH signal and salinity signal is generated through the SHAP value bar chart and the SHAP value dependency graph, and the feature weights of the third current density data, temperature signal, pH signal and salinity signal are determined based on the feature importance ranking.

[0056] In order to better understand the complete technical solution of this application, the following specific embodiments are provided: S501, calibrating and deploying the dissolved oxygen monitoring equipment: placing the reference electrode, the working electrode and the auxiliary electrode in a monitoring environment with the same temperature, the same salinity and the same pH but different oxygen contents, applying a constant potential to the working electrode, and obtaining a plurality of oxygen content data and a plurality of current density data corresponding to the oxygen content data; S502, performing linear fitting on all current density data corresponding to all oxygen content data to generate an initial mapping curve; The reference electrode, the working electrode and the auxiliary electrode are placed in a monitoring environment with different temperatures, different salinities and different pH values ​​and a constant oxygen content, and the current density data of the working electrode is obtained. The current density data of the working electrode is cleaned, filtered and normalized, and the current density data of the working electrode is divided into training set data and test set data; S503, training the training set data based on the initial mapping curve through an adaptive enhanced ensemble learning framework and SHAP interpretability analysis to obtain an initial monitoring model; S504, obtaining an initial monitoring result based on the initial monitoring model by using an adaptive enhanced integrated learning framework, the training set data, and the test set data, wherein the initial monitoring result includes a scatter plot; S505, when the distribution of the scatter plot meets the preset requirements, the initial monitoring model is analyzed through SHAP interpretability analysis to obtain a SHAP value bar chart and a SHAP value dependency graph, and the correlation between the current density data, the temperature signal, the pH signal and the salinity signal and the initial monitoring results is evaluated based on the SHAP value bar chart and the SHAP value dependency graph; S506, when the third current density data has the highest correlation with the initial monitoring result, the importance ranking of the third current density data, the temperature signal, the pH signal and the salinity signal is obtained based on the SHAP value bar graph and the SHAP value dependency graph, and the feature weights of the third current density data, the temperature signal, the pH signal and the salinity signal are determined based on the importance ranking, and all the feature weights are assigned to the initial monitoring model to obtain a dissolved oxygen content monitoring model; S507, start the dissolved oxygen monitoring device, make the reference electrode, the working electrode, the auxiliary electrode, the temperature electrode, the pH electrode and the conductivity electrode work, obtain the first current density data, determine the temperature signal based on the resistance value of the thermistor, determine the pH signal based on the current value of the pH electrode, and determine the salinity signal based on the current value of the conductivity electrode; S508, inputting the first current density data, the temperature signal, the pH signal and the salinity signal into a pre-trained dissolved oxygen content monitoring model, wherein the dissolved oxygen content monitoring model obtains a dissolved oxygen content monitoring result based on the first current density data, the temperature signal, the pH signal and the salinity signal; S509, a corrosion risk assessment will be conducted based on the dissolved oxygen content monitoring results to obtain the steel bar corrosion risk level.

[0057] like Figure 8 As shown, Figure 8 : is a structural diagram of a dissolved oxygen monitoring device inside reinforced concrete provided by an embodiment of the present invention. The present invention also provides a dissolved oxygen monitoring device inside reinforced concrete, comprising: The processor 601 may be implemented by a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present application; The memory 602 can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 602 can store an operating system and other application programs. When the technical solution provided in the embodiment of this specification is implemented by software or firmware, the relevant program code is stored in the memory 602, and the processor 601 calls and executes the method for monitoring dissolved oxygen inside reinforced concrete in the embodiment of this application; Input / output interface 603, used to implement information input and output; Communication interface 604, used to realize communication interaction between the device and other devices, which can be realized through wired mode (such as USB, network cable, etc.) or wireless mode (such as mobile network, WIFI, Bluetooth, etc.); A bus 605 that transmits information between various components of the device (e.g., processor 601, memory 602, input / output interface 603, and communication interface 604); The processor 601 , the memory 602 , the input / output interface 603 and the communication interface 604 are connected to each other in communication within the device via a bus 605 .

[0058] An embodiment of the present application further provides a storage medium, which is a computer-readable storage medium. The storage medium stores a computer program, and when the computer program is executed by a processor, the above-mentioned method for monitoring dissolved oxygen inside reinforced concrete is implemented.

[0059] As a non-transient computer-readable storage medium, the memory can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage devices. In some embodiments, the memory may optionally include a memory remotely arranged relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof. The device embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and are implemented to be located in one place, or may also be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0060] It will be appreciated by those skilled in the art that all or some of the steps and systems in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or transient medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically include computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0061] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions under the shared conditions without violating the spirit of the present invention. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A dissolved oxygen monitoring device inside reinforced concrete, characterized in that: The dissolved oxygen monitoring device is arranged inside the reinforced concrete, and the reinforced concrete is immersed in seawater. The dissolved oxygen monitoring device comprises: Sleeve; A reference electrode, an auxiliary electrode and a working electrode, wherein the reference electrode, the auxiliary electrode and the working electrode are located inside the sleeve; An electrolyte gel filled in the sleeve; A porous membrane layer is attached to the surface of the auxiliary electrode, and the porous membrane layer includes an inner membrane layer, an outer membrane layer and an intermediate membrane layer. The inner membrane layer and the outer membrane layer are made of corrosion-resistant metal or carbon fiber material, and the intermediate membrane layer is an oxygen-permeable membrane.

2. The dissolved oxygen monitoring device inside reinforced concrete according to claim 1, characterized in that: The working electrode is a stainless steel electrode, the reference electrode is a silver electrode, a silver chloride electrode, a titanium mesh electrode or a saturated calomel electrode, and the auxiliary electrode is a graphite electrode, a stainless steel electrode or a titanium mesh electrode; The dissolved oxygen monitoring device also includes a temperature electrode, a pH electrode and a conductivity electrode. The temperature electrode, the pH electrode and the conductivity electrode are located inside the sleeve. The temperature electrode is a thermistor. The material of the pH electrode is iridium oxide. The material of the conductivity electrode is graphite.

3. The dissolved oxygen monitoring device inside reinforced concrete according to claim 1, characterized in that: The electrolyte gel comprises colloid and electrolyte solution, the colloid comprises at least one of agar, cellulose and acrylamide, and the electrolyte solution comprises potassium chloride, sodium chloride and lithium chloride.

4. A method for monitoring dissolved oxygen inside reinforced concrete, characterized in that: The dissolved oxygen monitoring device used in reinforced concrete according to any one of claims 1 to 3, the method comprising: Turning on the dissolved oxygen monitoring device, operating the reference electrode, the working electrode and the auxiliary electrode, and acquiring first current density data, wherein the first current density data is the current density data of the working electrode; Inputting the first current density data into a pre-trained dissolved oxygen content monitoring model, wherein the dissolved oxygen content monitoring model obtains a dissolved oxygen content monitoring result based on the first current density data; A corrosion risk assessment will be performed based on the dissolved oxygen content monitoring results to obtain the steel bar corrosion risk level.

5. The method for monitoring dissolved oxygen in reinforced concrete according to claim 4, characterized in that: The dissolved oxygen monitoring device further comprises: a temperature electrode, a pH electrode and a conductivity electrode, wherein the temperature electrode, the pH electrode and the conductivity electrode are located inside the sleeve, the temperature electrode is a thermistor, the material of the pH electrode is iridium oxide, and the material of the conductivity electrode is graphite; after the dissolved oxygen monitoring device is turned on, it further comprises: The temperature electrode, the pH electrode and the conductivity electrode work to determine the temperature signal based on the resistance value of the thermistor, the pH signal based on the current value of the pH electrode, and the salinity signal based on the current value of the conductivity electrode; The dissolved oxygen content monitoring model obtains the temperature signal, the pH signal and the salinity signal, and generates the dissolved oxygen content monitoring result based on the first current density data, the temperature signal, the pH signal and the salinity signal.

6. The method for monitoring dissolved oxygen in reinforced concrete according to claim 5, characterized in that: Before inputting the first current density data into a pre-trained dissolved oxygen content monitoring model, the method includes: Placing the reference electrode, the working electrode and the auxiliary electrode in a monitoring environment with the same temperature, salinity and pH but different oxygen contents, applying a constant potential to the working electrode, and obtaining a plurality of oxygen content data and a plurality of second current density data corresponding to the oxygen content data; Performing linear fitting on all the oxygen content data and all the second current density data to generate an initial mapping curve, wherein the second current density data is the current density data of the working electrode; Based on the initial mapping curve, the dissolved oxygen content monitoring model is obtained through an adaptive enhanced ensemble learning framework and SHAP interpretability analysis.

7. The method for monitoring dissolved oxygen in reinforced concrete according to claim 6, characterized in that: Based on the initial mapping curve, the dissolved oxygen content monitoring model is obtained through an adaptive enhanced ensemble learning framework and SHAP interpretability analysis, including: Placing the reference electrode, the working electrode and the auxiliary electrode in a monitoring environment with different temperatures, different salinities and different pH values ​​and a constant oxygen content, obtaining the third current density data, cleaning, filtering and normalizing the third current density data, and dividing the third current density data into training set data and test set data; The training set data is trained based on the initial mapping curve through an adaptive enhanced ensemble learning framework and SHAP interpretability analysis to obtain an initial monitoring model; The initial monitoring model is evaluated by using the training set data and the test set data to obtain an evaluation result. When the evaluation result meets a preset condition, the dissolved oxygen content monitoring model is determined based on the initial monitoring model through SHAP interpretability analysis.

8. The method for monitoring dissolved oxygen in reinforced concrete according to claim 7, characterized in that: Determining the dissolved oxygen content monitoring model based on the initial monitoring model through SHAP interpretability analysis includes: Analyzing the initial monitoring model through SHAP interpretability analysis to obtain a SHAP value bar chart and a SHAP value dependency graph, and evaluating the correlation between the third current density data, the temperature signal, the pH signal, and the salinity signal and the initial monitoring result based on the SHAP value bar chart and the SHAP value dependency graph, respectively, wherein the evaluation result includes the initial monitoring result; When the third current density data has the highest correlation with the initial monitoring result, obtaining the importance ranking of the third current density data, the temperature signal, the pH signal, and the salinity signal based on the SHAP value bar graph and the SHAP value dependency graph; Based on the importance ranking, the characteristic weights of the third current density data, the temperature signal, the pH signal and the salinity signal are determined respectively, and all the characteristic weights are assigned to the initial monitoring model to obtain the dissolved oxygen content monitoring model.

9. A dissolved oxygen monitoring device inside reinforced concrete, characterized in that: It includes at least one control processor and a memory for communicating with the at least one control processor; the memory stores instructions that can be executed by the at least one control processor, and the instructions are executed by the at least one control processor so that the at least one control processor can execute the dissolved oxygen monitoring method inside reinforced concrete as described in any one of claims 4 to 8.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the method for monitoring dissolved oxygen inside reinforced concrete as described in any one of claims 4 to 8.

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