Photovoltaic pile with rust sensing and self-repairing functions

Abstract

The utility model provides a kind of photovoltaic pile with rust perception and self-repairing function belongs to photovoltaic pile technical field, including pile body and the steel reinforcement framework buried in pile body, further include: rust detection module, rust detection module is buried in pile body;Self-repairing module;Processor is when the rust characteristic parameter of steel reinforcement framework exceeds threshold value to self-repairing module output control instruction;The beneficial effects of the utility model are that: rust detection module is built-in in pile body and the rust condition of steel reinforcement framework is detected in real time, when steel reinforcement framework occurs rust, self-repairing module can repair steel reinforcement framework and / or the environment where steel reinforcement framework is located is realkalized, to prevent actively by intervening corrosion environment before rust has caused macrostructure destruction, even before its germination, rust risk is eliminated in germination state, without artificial measurement again and other dangerous work, for the long-term service safety of major infrastructure and full life cycle durability provide technical support.

Description

Technical Field

[0001] This utility model belongs to the field of photovoltaic pile technology and relates to a photovoltaic pile with corrosion detection and self-repair function. Background Technology

[0002] As the global energy structure shifts towards cleaner and lower-carbon energy, photovoltaic (PV) power generation, as an important form of renewable energy, has seen its installed capacity grow rapidly. In areas with limited land resources or complex environments (such as coastal mudflats, lakes, and fishponds), new PV application models such as "fishery-solar complementarity" have emerged, significantly expanding the construction boundaries of PV power plants. These projects typically use precast concrete piles (referred to as "PV piles") as the foundation structure for PV supports, and are widely adopted due to their convenient construction, high load-bearing capacity, and controllable costs.

[0003] However, in harsh operating environments such as marine, coastal, or high-humidity and high-salt environments, photovoltaic piles are exposed to multiple deterioration factors such as chloride ion corrosion, alternating wet and dry conditions, freeze-thaw cycles, and the impact of wind and waves, posing a serious challenge to their durability. Among these, steel reinforcement corrosion is the most prominent and damaging problem. After chloride ions penetrate to the surface of the steel reinforcement, they destroy the passivation film on the surface of the steel reinforcement, triggering an electrochemical corrosion reaction; the volume expansion of corrosion products further leads to cracking and peeling of the concrete protective layer, ultimately weakening the structural load-bearing capacity and shortening its service life.

[0004] Currently, monitoring of steel reinforcement corrosion mainly relies on periodic manual inspections. This method has significant limitations: firstly, manual inspections are inefficient, time-consuming, and costly, and are difficult and pose significant safety risks in offshore or remote areas; secondly, even if corrosion information is obtained through sensors, on-site assessment and remedial measures (such as applying rust inhibitors or upgrading cathodic protection) by maintenance personnel are still required, making timely and automated intervention impossible. Furthermore, traditional concrete structures generally lack proactive repair capabilities. Once steel reinforcement begins to corrode, the damage accumulates irreversibly until it affects the structural safety of the photovoltaic piles. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a photovoltaic pile with corrosion detection and self-healing functions.

[0006] The objective of this utility model can be achieved through the following technical solution: A photovoltaic pile with corrosion detection and self-repair function, comprising a pile body and a steel reinforcement skeleton embedded in the pile body, and further comprising:

[0007] A corrosion detection module is embedded in the pile body and is configured to monitor the corrosion characteristic parameters of the reinforcing steel cage and output corresponding signals.

[0008] The self-healing module is configured to alkalize the environment around the steel reinforcement cage and / or release a repair agent to the rusted parts of the steel reinforcement cage when a control command is received.

[0009] The processor, the corrosion detection module, and the self-healing module are all electrically connected to the processor. The processor is configured to receive the corresponding signal output by the corrosion detection module and determine whether the corrosion characteristic parameters of the steel reinforcement cage exceed a set threshold. When the corrosion characteristic parameters of the steel reinforcement cage exceed the threshold, the processor outputs a control command to the self-healing module.

[0010] Preferably, the corrosion detection module includes a potential / current sensor for monitoring the electrochemical state of the reinforcing bar cage and / or a chloride ion concentration sensor for detecting the chloride ion concentration in the pore liquid of the pile concrete and / or a micro-strain sensor for detecting the expansion deformation of the reinforcing bar cage due to corrosion products.

[0011] Preferably, there are multiple corrosion detection modules, each of which is tied to the reinforcing steel frame and arranged at intervals along the length of the reinforcing steel frame.

[0012] Preferably, the self-healing module includes an electrochemical realkalization device and / or a release device with a built-in repair agent.

[0013] Preferably, the electrochemical realkalization device includes a controllable DC power supply and an auxiliary electrode. The auxiliary electrode is embedded in the pile body and does not contact the reinforcing steel skeleton. The controllable DC power supply is electrically connected to the processor. The negative terminal of the controllable DC power supply is electrically connected to the reinforcing steel skeleton, thereby making the reinforcing steel skeleton a cathode structure. The positive terminal of the controllable DC power supply is electrically connected to the auxiliary electrode, thereby making the auxiliary electrode an anode structure. When the controllable DC power supply supplies power, a current loop is formed between the reinforcing steel skeleton and the auxiliary electrode.

[0014] Preferably, the auxiliary electrode is a titanium mesh or titanium grid strip coated with a mixed metal oxide coating.

[0015] Preferably, the release device includes a container for storing the repair agent and a piezoelectric actuator. The container is located on the pile body near the reinforcing steel cage. The piezoelectric actuator is mechanically coupled to the container and electrically connected to the processor. The piezoelectric actuator is configured to release the repair agent from the container upon receiving a control command.

[0016] Preferably, the container is configured as a capsule structure formed of a brittle polymer film or a fractured ceramic shell.

[0017] Preferably, the piezoelectric actuator is configured as a piezoelectric ceramic element, the deformed portion of the piezoelectric ceramic element is in close contact with the container, and the piezoelectric ceramic element generates deformation that causes the container to rupture when energized.

[0018] Preferably, the surface of the steel reinforcement cage is provided with a guide groove or capillary channel.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. The pile body is equipped with a corrosion detection module to monitor the corrosion of the reinforcing steel cage in real time. When the reinforcing steel cage is corroded, the self-healing module can repair the reinforcing steel cage and / or re-alkalize the environment in which the reinforcing steel cage is located. Thus, before the corrosion causes macroscopic structural damage or even before it occurs, it can actively prevent corrosion by intervening in the corrosive environment, eliminating the risk of corrosion in its infancy. This eliminates the need for dangerous work such as manual re-measurement, providing technical support for the long-term service safety and life-cycle durability of major infrastructure.

[0021] 2. The current is provided by a controllable DC power supply, which makes the steel reinforcement cage act as the cathode and the auxiliary electrode act as the anode to form a current loop, drive the electrochemical reaction, and cause the pH value of the concrete pore liquid around the steel reinforcement cage to rise, restore the highly alkaline environment, thereby promoting the regeneration and stabilization of the passivation film that has been damaged or is about to be destroyed on the surface of the steel reinforcement cage, and inhibiting the electrochemical process of corrosion from the root.

[0022] 3. Upon receiving an electrical signal, the piezoelectric actuator undergoes instantaneous deformation, applying mechanical force to the container, causing it to rupture. This releases the liquid or paste-like repair agent sealed within the container to the corroded areas of the reinforcing steel frame. The repair agent can adsorb harmful substances such as chloride ions and chemically seal and repair even minor corrosion areas. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the photovoltaic pile of this utility model.

[0024] Figure 2 This is a schematic diagram showing the connection relationship between the steel reinforcement cage, the corrosion detection module, and the release device of this utility model.

[0025] Figure 3 This is a schematic diagram illustrating the working principle of the electrochemical realkalization device of this utility model.

[0026] In the diagram, 100 is the pile body; 200 is the reinforcing steel cage; 300 is the corrosion detection module; 310 is the potential / current sensor; 320 is the chloride ion concentration sensor; 330 is the micro-strain sensor; 400 is the electrochemical re-alkalization device; 410 is the controllable DC power supply; 420 is the auxiliary electrode; 500 is the release device; 510 is the container; and 520 is the piezoelectric actuator. Detailed Implementation

[0027] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0028] like Figures 1 to 3 As shown, a photovoltaic pile with corrosion detection and self-healing functions includes a pile body 100 and a steel reinforcement cage 200 embedded in the pile body 100, and also includes:

[0029] The corrosion detection module 300 is embedded in the pile body 100 and is set to monitor the corrosion characteristic parameters of the steel reinforcement cage 200 and output corresponding signals.

[0030] The self-healing module is configured to alkalize the environment around the steel reinforcement cage 200 and / or release a repair agent to the rusted parts of the steel reinforcement cage 200 when a control command is received.

[0031] The processor, the corrosion detection module 300, and the self-repair module are all electrically connected to the processor. The processor is configured to receive the corresponding signals output by the corrosion detection module 300 and determine whether the corrosion characteristic parameters of the steel reinforcement cage 200 exceed the set threshold. When the corrosion characteristic parameters of the steel reinforcement cage 200 exceed the threshold, the processor outputs a control command to the self-repair module.

[0032] The pile body 100 is a precast pile made of high-performance concrete, and the reinforcing cage 200 is a prestressed or ordinary reinforcing cage. The reinforcing cage 200 is the object of corrosion monitoring and repair. The corrosion detection module 300 is a miniaturized, alkali-resistant corrosion sensor array embedded inside the pile body 100. The corrosion detection module 300 is designed to continuously and in situ monitor multiple characteristic parameters directly related to the corrosion process of the reinforcing cage 200, such as the potential / current signal of the reinforcing steel, the chloride ion concentration in the pore fluid of the surrounding concrete, and the micro-strain changes caused by the expansion of corrosion products.

[0033] The self-healing module is a device for performing repair operations. It adopts a dual-path synergistic strategy to meet the needs of the steel reinforcement cage 200 at different stages of corrosion development.

[0034] The first pathway is electrochemical re-alkalization: When a control command is received from the processor, the electrochemical re-alkalization device 400 in the self-repair module is activated, applying a weak DC current with controllable duration between the reinforcing steel skeleton 200 and the auxiliary electrode 420 embedded in the pile body 100. This current is provided by a controllable DC power supply 410, forming a current loop with the reinforcing steel skeleton 200 as the cathode and the auxiliary electrode 420 as the anode. This drives an electrochemical reaction, causing the pH value of the pore liquid in the concrete around the reinforcing steel skeleton 200 to rise, restoring a highly alkaline environment. This promotes the regeneration and stabilization of the passivation film on the surface of the reinforcing steel skeleton 200 that has been damaged or is on the verge of destruction, thereby inhibiting the electrochemical process of corrosion from the root.

[0035] The second pathway involves the active release of the repair agent: Simultaneously with outputting control commands, the processor activates the release device 500 within the self-repair module. This release device 500 includes a container 510 for storing the repair agent and a piezoelectric actuator 520 mechanically coupled to it. Upon receiving an electrical signal, the piezoelectric actuator 520 undergoes a momentary deformation, applying a mechanical force to the container 510, causing it to rupture and thus releasing the liquid or paste-like repair agent sealed within the container 510 to the corroded areas of the reinforcing steel frame 200. The repair agent can adsorb harmful substances such as chloride ions and chemically seal and repair minute areas of corrosion.

[0036] The processor is located inside or on top of the pile body 100. The processor is embedded with a trained intelligent diagnostic algorithm, which can perform fusion analysis and trend judgment on multi-source sensor data. When the algorithm analysis results indicate that the corrosion status of the steel bars or environmental inducing factors (such as the continuous accumulation of chloride ion concentration) has exceeded the preset safety threshold, indicating that corrosion is about to occur or has already begun, the processor will immediately generate and issue a precise control command.

[0037] The aforementioned design, through real-time monitoring of corrosion characteristic parameters by the corrosion detection module 300 and intelligent threshold judgment by the processor, can trigger the self-healing module to alkalize and / or release repair agents around the steel reinforcement cage 200 before corrosion causes macroscopic structural damage or even before corrosion begins. This proactively intervenes in the corrosion process, eliminating corrosion risks at their inception. It achieves autonomous perception, autonomous decision-making, and autonomous repair of the photovoltaic pile throughout its entire life cycle after construction, without the need for manual on-site inspection or intervention. This significantly improves the long-term service safety and durability of the pile structure 100, providing reliable technical support for the intelligent operation and maintenance of major concrete infrastructure.

[0038] It should be noted that the processor is pre-installed with an intelligent diagnostic algorithm. The threshold values ​​of corrosion characteristic parameters used for its judgment are based on the specific material parameters (such as concrete mix proportions and raw material properties) and structural parameters (such as protective layer thickness and reinforcement details) of the photovoltaic pile, and are calibrated through accelerated corrosion testing methods. Accelerated corrosion tests include energized accelerated tests, high-temperature accelerated tests, wet-dry cycle tests, semi-immersion tests, or model calculation methods based on numerical simulation. Through the above experiments, corresponding potential difference thresholds, chloride ion concentration thresholds, and micro-strain thresholds can be constructed for different types of photovoltaic piles, and this threshold data is embedded in the processor's judgment logic. During application, the processor continuously receives and analyzes multi-source signals from the corrosion detection module 300; when any corrosion characteristic parameter exceeds the preset threshold, the processor automatically determines that the steel reinforcement cage 200 has a corrosion risk and outputs corresponding control commands to the self-healing module, thereby realizing fully autonomous closed-loop control from perception, judgment to response.

[0039] like Figure 1 , Figure 2 As shown, based on the above embodiments, the corrosion detection module 300 includes a potential / current sensor 310 for monitoring the electrochemical state of the reinforcing bar cage 200 and / or a chloride ion concentration sensor 320 for detecting the chloride ion concentration in the concrete pore liquid of the pile body 100 and / or a micro-strain sensor 330 for detecting the expansion and deformation of the reinforcing bar cage 200 due to corrosion products.

[0040] The potential / current sensor 310 is used to monitor the electrochemical state of the reinforcing steel cage 200; the chloride ion concentration sensor 320 is used to detect the chloride ion content in the pore fluid of the concrete in the pile body 100, as chloride ions are a key factor inducing depassivation and corrosion of the reinforcing steel; the micro-strain sensor 330 is used to sense the local deformation or stress change in the reinforcing steel cage 200 caused by the volume expansion of corrosion products (rust). Specifically, since the volume of rust can be several times that of the original metal, it will generate expansion stress inside the concrete, leading to microcracks or a sudden increase in strain. The micro-strain sensor 330 can capture this mechanical response.

[0041] Preferably, there are multiple rust detection modules 300, each of which is tied to the reinforcing steel cage 200 and arranged at intervals along the length of the reinforcing steel cage 200.

[0042] The three types of sensors are arranged in an array, spaced apart along the 200mm length of the reinforcing steel frame, and electrically connected to a processor inside the sealed cavity at the top of the pile via alkali-resistant and corrosion-resistant wires. Through multi-source data fusion, the processor can more accurately determine the stage and trend of corrosion, thus providing precise triggering basis for the self-healing module. This multi-parameter collaborative sensing mechanism enables the system to achieve both proactive prevention before corrosion begins and timely intervention for existing microscopic damage.

[0043] like Figures 1 to 3 As shown, based on the above embodiments, the self-healing module includes an electrochemical realkalization device 400 and / or a release device 500 containing a repair agent.

[0044] Based on the above embodiments, the electrochemical realkalization device 400 includes a controllable DC power supply 410 and an auxiliary electrode 420. The auxiliary electrode 420 is embedded in the pile body 100 and does not contact the reinforcing steel skeleton 200. The controllable DC power supply 410 is electrically connected to the processor. The negative terminal of the controllable DC power supply 410 is electrically connected to the reinforcing steel skeleton 200, thereby making the reinforcing steel skeleton 200 form a cathode structure. The positive terminal of the controllable DC power supply 410 is electrically connected to the auxiliary electrode 420, thereby making the auxiliary electrode 420 form an anode structure. When the controllable DC power supply 410 supplies power, a current loop is formed between the reinforcing steel skeleton 200 and the auxiliary electrode 420.

[0045] Specifically, the auxiliary electrode 420 is made of an inert material, preferably a titanium mesh or titanium grid coated with a mixed metal oxide coating. It is pre-embedded in the concrete during the construction of the pile body 100, and is insulated from and arranged parallel to the reinforcing steel frame 200, forming a distributed anode structure. The controllable DC power supply 410, as a micro-current power supply and regulation unit, is electrically connected to the processor. It can precisely adjust the output voltage and current density according to the control commands output by the processor, and adaptively adjust the energizing time based on parameters (such as potential and ambient humidity) fed back by the corrosion detection module 300, ensuring effective re-alkalization while avoiding side effects such as hydrogen embrittlement.

[0046] The specific principle of the electrochemical realkalization device 400 is as follows: the steel reinforcement skeleton 200 itself acts as the cathode, forming a closed circuit together with the auxiliary electrode 420. When the processor determines that the corrosion characteristic parameters exceed the threshold and outputs a control command, the controllable DC power supply 410 is activated, applying a weak DC current between the steel reinforcement skeleton 200 (cathode) and the auxiliary electrode 420 (anode), driving OH- ions to migrate to the surface of the steel reinforcement, increasing the pH value of the pore liquid, restoring the highly alkaline environment, and promoting the regeneration of the passivation film.

[0047] Based on the above embodiments, the release device 500 includes a container 510 for storing the repair agent and a piezoelectric actuator 520. The container 510 is located in the pile body 100 near the steel reinforcement cage 200. The piezoelectric actuator 520 is mechanically coupled to the container 510 and electrically connected to the processor. The piezoelectric actuator 520 is configured to release the repair agent from the container 510 after receiving a control command.

[0048] The container 510 is used to store the repair agent. The container 510 is configured as a capsule structure formed by a brittle polymer film or a fractured ceramic shell, encapsulating liquid or paste-like repair materials (such as migratory rust inhibitor MCI, crystalline repair agents, etc.). During the pile body 100 fabrication stage, it is pre-embedded in an array in high-risk corrosion areas near the reinforcing steel frame 200. The piezoelectric actuator 520 is a piezoelectric ceramic component. The deformed portion of the piezoelectric ceramic component is in close contact with the container 510. When energized, the piezoelectric ceramic component generates deformation that causes the container 510 to rupture. The piezoelectric ceramic component is electrically connected to the processor. When the piezoelectric ceramic component receives a control command from the processor, the piezoelectric actuator 520 is energized to generate instantaneous controllable deformation, applying concentrated stress to the container 510, causing it to rupture.

[0049] In addition, the surface of the reinforcing steel cage 200 is provided with guide channels or capillary channels. The guide channels or capillary channels are used to guide the repair agent from the broken container 510 to the rusted parts of the reinforcing steel cage 200, so as to achieve precise coverage and efficient adsorption.

[0050] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0051] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0052] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0054] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A photovoltaic pile with corrosion detection and self-healing functions, comprising a pile body (100) and a steel reinforcement cage (200) embedded in the pile body (100), characterized in that, Also includes: A corrosion detection module (300) is embedded in the pile body (100). The corrosion detection module (300) is configured to monitor the corrosion characteristic parameters of the steel reinforcement cage (200) and output corresponding signals. The self-healing module is configured to alkalize the environment around the steel reinforcement cage (200) and / or release a repair agent to the rusted parts of the steel reinforcement cage (200) when a control command is received; The processor, the corrosion detection module (300) and the self-healing module are all electrically connected to the processor. The processor is configured to receive the corresponding signal output by the corrosion detection module (300) and determine whether the corrosion characteristic parameters of the steel reinforcement cage (200) exceed a set threshold. When the corrosion characteristic parameters of the steel reinforcement cage (200) exceed the threshold, the processor outputs a control command to the self-healing module.

2. A photovoltaic pile with corrosion detection and self-healing function as described in claim 1, characterized in that: The corrosion detection module (300) includes a potential / current sensor (310) for monitoring the electrochemical state of the reinforcing bar cage (200) and / or a chloride ion concentration sensor (320) for detecting the chloride ion concentration in the pore liquid of the concrete of the pile body (100) and / or a micro-strain sensor (330) for detecting the expansion and deformation of the reinforcing bar cage (200) due to corrosion products.

3. A photovoltaic pile with corrosion detection and self-healing function as described in claim 2, characterized in that: The number of the corrosion detection modules (300) is multiple, and each of the corrosion detection modules (300) is tied to the steel reinforcement cage (200) and arranged at intervals along the length direction of the steel reinforcement cage (200).

4. A photovoltaic pile with corrosion detection and self-healing function as described in claim 1, characterized in that: The self-healing module includes an electrochemical realkalization device (400) and / or a release device (500) with a built-in repair agent.

5. A photovoltaic pile with corrosion detection and self-healing function as described in claim 4, characterized in that: The electrochemical realkalization device (400) includes a controllable DC power supply (410) and an auxiliary electrode (420). The auxiliary electrode (420) is embedded in the pile body (100) and does not contact the reinforcing steel frame (200). The controllable DC power supply (410) is electrically connected to the processor. The negative terminal of the controllable DC power supply (410) is electrically connected to the reinforcing steel frame (200), thereby making the reinforcing steel frame (200) form a cathode structure. The positive terminal of the controllable DC power supply (410) is electrically connected to the auxiliary electrode (420), thereby making the auxiliary electrode (420) form an anode structure. When the controllable DC power supply (410) supplies power, a current loop is formed between the reinforcing steel frame (200) and the auxiliary electrode (420).

6. A photovoltaic pile with corrosion detection and self-healing function as described in claim 5, characterized in that: The auxiliary electrode (420) is a titanium mesh or titanium grid strip coated with a mixed metal oxide coating.

7. A photovoltaic pile with corrosion detection and self-healing function as described in claim 4, characterized in that: The release device (500) includes a container (510) for storing the repair agent and a piezoelectric actuator (520). The container (510) is located on the pile body (100) near the reinforcing steel cage (200). The piezoelectric actuator (520) is mechanically coupled to the container (510) and electrically connected to the processor. The piezoelectric actuator (520) is configured to release the repair agent from the container (510) upon receiving a control command.

8. A photovoltaic pile with corrosion detection and self-healing function as described in claim 7, characterized in that: The container (510) is configured as a capsule structure formed of a brittle polymer film or a fractured ceramic shell.

9. A photovoltaic pile with corrosion detection and self-healing function as described in claim 7, characterized in that: The piezoelectric actuator (520) is configured as a piezoelectric ceramic component, the deformed portion of the piezoelectric ceramic component is in close contact with the container (510), and the piezoelectric ceramic component generates deformation that causes the container (510) to rupture when energized.

10. A photovoltaic pile with corrosion detection and self-healing function as described in claim 7, characterized in that: The surface of the steel reinforcement cage (200) is provided with a guide groove or capillary channel.

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