Method and system for detecting corrosion of fan component based on microprobe

Abstract

The invention relates to a method and system for detecting corrosion of a fan component based on a microprobe, and the method comprises the following steps: obtaining operation data of detection equipment, controlling a microprobe at the bottom of the detection equipment to move on the surface of the fan component at a preset stepping distance, and transmitting an AC signal with a preset frequency; the alternating current signal enters a steel structure of the fan component through a coating on the surface of the fan component, a capacitance effect is generated among the coating, the microprobe and the steel structure, and phasor change of the alternating current signal is recorded; constructing a resistance-capacitance equivalent circuit model, calculating metal resistance and metal capacitance based on the phasor change of the alternating current signal and the operation data, and reflecting the metal corrosion condition and the coating service condition as detection data; sending the detection data to a cloud end by using a signal receiving and transmitting device; and the cloud stores and analyzes the detection data in real time, and predicts the corrosion trend and the remaining service life of the fan component.

Description

Technical Field

[0001] The present application relates to the technical field of material corrosion detection, and mainly to a method and system for detecting corrosion of fan components based on a microprobe. Background Art

[0002] In recent years, with the in-depth development and strategic layout of the marine economy, offshore wind power, as a representative of clean and renewable energy, has played an increasingly important role in promoting the transformation of energy structure and achieving sustainable development. However, the uniqueness of the marine environment, especially the harsh conditions such as high salt fog, high humidity, strong ultraviolet rays, and large temperature difference between day and night, poses a severe challenge to the durability of offshore wind power facilities. Offshore wind power equipment, especially wind turbine components, exposed to such a harsh environment for a long time will accelerate the corrosion process and seriously affect the reliability and service life of the equipment. Once the wind turbine components are corroded, their structural strength decreases, which is easy to cause economic losses and safety hazards, seriously affecting the safe operation and performance of offshore wind power. Therefore, it is necessary to develop a comprehensive and effective wind turbine component corrosion detection method to provide a strong guarantee for the safe operation of offshore wind power facilities.

[0003] At present, the corrosion monitoring of offshore wind turbines mostly adopts probe technology, which requires the probe to directly contact the metal material to be monitored, and characterize the corrosion of the metal material through electrical signals such as resistance, inductance, and potential; or infer the corrosion of the monitored metal material through the corrosion of the probe. However, in the existing corrosion monitoring technology, DC detection technology is used, which ignores the capacitance effect. The coating resistance is much greater than the metal resistance, so the sensitivity of the meter is extremely high. In addition, DC carries less information and can only reflect the overall corrosion of the metal and coating of the wind turbine components, but cannot reflect the changes in the characteristics of the steel and coating caused by corrosion.

[0004] For example, the Chinese invention patent with the publication number of "CN113970516A" discloses a "Metal Material Corrosion Monitoring System and Method", which specifically discloses "A Metal Material Corrosion Monitoring System and Method, the system comprising: a signal excitation unit for applying a sinusoidal AC excitation signal to two electrochemical impedance probes through an electrochemical impedance monitor; a signal receiving unit for obtaining an instantaneous response signal based on the sinusoidal AC excitation signal through the electrochemical impedance monitor; an electrical signal parameter acquisition unit for obtaining an equivalent circuit between two wires respectively connected to the two electrochemical impedance probes according to the instantaneous response signal. Impedance; data analysis unit, used to calculate the corrosion current density and corrosion rate according to the equivalent impedance, so as to realize the corrosion monitoring of metal materials". However, this method adopts contact detection, and detects through electrochemical impedance monitor and electrochemical impedance probe. Specific probes will be installed on the metal material, which will cause damage to the surface of the metal material and make it difficult to fully cover the parts, resulting in limited accuracy of the test results. In addition, this method only calculates the corrosion current density and corrosion rate based on the equivalent impedance to monitor the corrosion situation. The analysis dimension is relatively single, and there is a lack of prediction of the development trend of metal corrosion and monitoring and analysis of the status of the metal protective layer. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present application provides a method and system for detecting corrosion of fan components based on microprobes.

[0006] The technical solution of this application is as follows:

[0007] In one aspect, the present invention provides a method for detecting corrosion of fan components based on a microprobe, the method comprising:

[0008] Acquire the operating data of the detection device, control the micro-probe probe at the bottom of the detection device to move on the surface of the fan component at a preset step distance, and send out an AC signal of a preset frequency;

[0009] The AC signal enters the steel structure of the fan component through the coating on the surface of the fan component, and a capacitive effect is generated between the coating, the microprobe and the steel structure, and the phase change of the AC signal is recorded; a resistance-capacitance equivalent circuit model is constructed, and based on the phase change of the AC signal and the operating data, the metal resistance and metal capacitance are calculated as detection data to reflect the metal corrosion condition and the coating service condition;

[0010] The detection data is sent to the cloud using a signal transceiver; the cloud stores and analyzes the detection data in real time to predict the corrosion trend and remaining service life of the fan components.

[0011] Preferably, the method further comprises performing data cleaning on the operating data, wherein the data cleaning comprises processing missing values, outliers and standardizing the data format.

[0012] Preferably, the operating data of the detection equipment includes the effective value of the voltage of the fan component, the effective value of the current of the fan component, the equivalent capacitance value, the AC signal frequency, the vacuum dielectric constant, the relative dielectric constant of the coating, the metal cross-sectional area, the microprobe contact area, the distance between the microprobe and the connecting probe, the coating thickness and the total number of detection points.

[0013] Preferably, the phase change of the AC signal is specifically that the current amplitude of the AC signal after passing through the coating becomes The voltage value lags behind the current value by 90°, which can be expressed as:

[0014]

[0015] In the formula, C represents the equivalent capacitance value; f represents the frequency of the AC signal;

[0016] The capacitive reactance effect corresponding to the generated capacitance effect is expressed as follows:

[0017]

[0018] Where, X C Indicates capacitive reactance.

[0019] Preferably, the total voltage and total current of the resistance-capacitance equivalent circuit model satisfy Kirchhoff's voltage law, which can be expressed as:

[0020] U=U R +U C =I(R-jX C );

[0021]

[0022]

[0023] Where, U represents the total voltage; U R Indicates the voltage across the metal resistor; U C represents the voltage across the metal capacitor; I represents the total current; R represents the metal resistance value; C0 represents the metal capacitance; L represents the distance between the microprobe and the connecting probe; j represents the imaginary unit; ε0 represents the vacuum dielectric constant; ε S represents the relative dielectric constant of the coating; S1 represents the metal cross-sectional area; S2 represents the microprobe contact area; and d represents the coating thickness.

[0024] Preferably, the microprobe moves on the surface of the fan component at a preset step distance to measure the change in metal resistance and metal capacitance, which is expressed as follows:

[0025] The microprobe moves on the surface of the fan component at a preset step distance to measure the change in metal resistance, which is expressed as:

[0026] ΔR=R n -R n-1 , n=1,2,...,N;

[0027] In the formula, ΔR represents the change in metal resistance; R n Indicates the resistance value of the nth detection point; n indicates the index value of the nth detection point; N indicates the total number of detection points;

[0028] The metal corrosion condition and the coating service condition are judged based on the change in the metal resistance value.

[0029] Preferably, the method also includes using the three-dimensional structure of the metal resistor, metal capacitor and fan component to generate a three-dimensional distribution map, specifically using a three-dimensional modeling software modeling tool to obtain the three-dimensional structural data of the fan component, and matching the metal resistor and metal capacitor data with the corresponding positions in the three-dimensional model of the fan component based on a coordinate mapping method; using a three-dimensional visualization tool to construct a three-dimensional coordinate system according to the three-dimensional structural data of the fan component, and selecting different colors to distinguish the metal resistor and metal capacitor data; selecting a graphic type to generate a three-dimensional distribution map; and analyzing the changing patterns of the metal resistor and metal capacitor through the three-dimensional distribution map.

[0030] On the other hand, the present invention also proposes a system for detecting corrosion of fan components based on a microprobe, the system comprising a data acquisition module, a detection module, a collection module and a result output module, wherein:

[0031] The data acquisition module is used to acquire the operating data of the detection device, control the micro-probe probe at the bottom of the detection device to move on the surface of the fan component at a preset step distance, and send an AC signal of a preset frequency; transmit the operating data to the detection module;

[0032] The detection module is used for the AC signal to enter the steel structure of the fan component through the coating on the surface of the fan component, generate a capacitive effect between the coating, the microprobe and the steel structure, and record the phase change of the AC signal; construct a resistance and capacitance equivalent circuit model, and calculate the metal resistance and metal capacitance based on the phase change of the AC signal and the operating data, as detection data to reflect the metal corrosion situation and the service condition of the coating;

[0033] The collection module is used to send the detection data to the cloud using a signal transceiver; the cloud stores and analyzes the detection data in real time to predict the corrosion trend and remaining service life of the fan components;

[0034] The result output module is used to display the corrosion trend and remaining service life of the fan components.

[0035] On the other hand, the present invention further proposes an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, a method for detecting corrosion of fan components based on a microprobe as described in any embodiment of the present invention is implemented.

[0036] On the other hand, the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a method for detecting corrosion of fan components based on a microprobe as described in any embodiment of the present invention.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 1) The present invention provides a method and system for detecting corrosion of fan components based on a microprobe, which uses a microprobe probe to transmit an AC signal, thereby enhancing the flexibility of the detection process, improving the applicability of the detection, and reducing the impact on the original structure and performance of the components;

[0039] 2) The present invention provides a method and system for detecting corrosion of fan components based on microprobes, which not only focuses on the corrosion of the metal of the fan components themselves, but also includes the service status of the coating in the detection and analysis scope. The microprobe sends an AC signal, comprehensively considers the capacitance effect generated between the coating, the microprobe and the steel structure, and the phase change of the AC signal in the conduction of the steel structure, thereby improving the comprehensive evaluation efficiency of the overall condition of the fan components. Compared with the solution of only detecting a single indicator, the comprehensiveness of the actual status of the maintenance components is enhanced;

[0040] 3) The present invention provides a method and system for detecting corrosion of fan components based on microprobes. The detection data is transmitted to the cloud in real time for storage and analysis through a signal transceiver, so as to predict the corrosion trend of fan components and calculate the remaining service life. This improves the intelligence level of data processing and the accuracy of prediction, helps to formulate scientific and reasonable maintenance plans in advance, and improves the reliability and economy of fan operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a flow chart of a method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0042] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0043] The present invention provides the following technical solution: a method and system for detecting corrosion of fan components based on microprobes.

[0044] Example 1

[0045] See Figure 1 This embodiment provides a method for detecting corrosion of fan components based on a microprobe, and the specific steps include:

[0046] S1, obtaining the operating data of the detection device, controlling the micro-probe probe at the bottom of the detection device to move on the surface of the fan component at a preset step distance, and emitting an AC signal of a preset frequency;

[0047] The method further includes performing data cleaning on the operation data, wherein the data cleaning includes processing missing values, abnormal values ​​and unifying data formats;

[0048] S11, the operating data of the detection equipment includes the effective value of the voltage of the fan component, the effective value of the current of the fan component, the equivalent capacitance value, the AC signal frequency, the vacuum dielectric constant, the relative dielectric constant of the coating, the metal cross-sectional area, the microprobe contact area, the distance between the microprobe and the connecting probe, the coating thickness and the total number of detection points;

[0049] S12. The voltage and current of the AC signal are expressed as follows:

[0050]

[0051] In the formula, u(t) represents the voltage value at time t; i(t) represents the current value at time t; U represents the effective value of voltage; I represents the effective value of current; ω represents the preset angular frequency; t represents the time;

[0052] S2, the AC signal enters the steel structure of the fan component through the coating on the surface of the fan component, a capacitive effect is generated between the coating, the microprobe and the steel structure, and the phase change of the AC signal is recorded; the phase change of the AC signal, specifically, the current amplitude of the AC signal after passing through the coating becomes The voltage value lags behind the current value by 90°, which can be expressed as:

[0053]

[0054] In the formula, C represents the equivalent capacitance value; f represents the frequency of the AC signal;

[0055] The capacitive reactance effect corresponding to the generated capacitance effect is expressed as follows:

[0056]

[0057] Where, X C It represents capacitive reactance;

[0058] S3, the AC signal is transmitted to the inside of the steel structure, a resistance and capacitance equivalent circuit model is constructed, and the metal resistance and metal capacitance are calculated based on the phase change of the AC signal and the operation data; the total voltage and total current of the resistance and capacitance equivalent circuit model satisfy Kirchhoff's voltage law, which is expressed as follows:

[0059] U=U R +U C =I(R-jX C );

[0060]

[0061] Where, U represents the total voltage; U R Indicates the voltage across the metal resistor; U C represents the voltage across the metal capacitor; I represents the total current; R represents the metal resistance value; C0 represents the metal capacitance; L represents the distance between the microprobe and the connecting probe; j represents the imaginary unit; ε0 represents the vacuum dielectric constant; ε S represents the relative dielectric constant of the coating; S1 represents the metal cross-sectional area; S2 represents the microprobe contact area; d represents the coating thickness;

[0062] S4, obtaining the metal corrosion status and coating service status, i.e., detection data; the microprobe moves on the surface of the fan component at a preset step distance, and the microprobe moves on the surface of the fan component at a preset step distance, and the change in metal resistance is measured, which is expressed as:

[0063] ΔR=R n -R n-1 , n=1,2,...,N;

[0064] In the formula, ΔR represents the change in metal resistance; R n Indicates the resistance value of the nth detection point; n indicates the index value of the nth detection point; N indicates the total number of detection points;

[0065] Judging the metal corrosion condition and coating service condition based on the change in the metal resistance value;

[0066] S5. Using a signal transceiver to send the detection data to the cloud: Specifically, the detection data is transmitted to a connection probe inside the steel structure, and the connection probe transmits the detection data to the detection device; the detection device sends the detection data to the cloud using a signal transceiver;

[0067] The cloud stores and analyzes the detection data in real time to predict the corrosion trend and remaining service life of the fan components;

[0068] S6. The method also includes using the three-dimensional structure of the metal resistor, the metal capacitor and the fan component to generate a three-dimensional distribution map, specifically using a three-dimensional modeling software modeling tool to obtain the three-dimensional structure data of the fan component, and matching the metal resistor and metal capacitor data with the corresponding positions in the three-dimensional model of the fan component based on a coordinate mapping method; using a three-dimensional visualization tool to construct a three-dimensional coordinate system according to the three-dimensional structure data of the fan component, and selecting different colors to distinguish the metal resistor and metal capacitor data, specifically, the metal resistance value lower than the preset resistance value threshold is represented by blue, and the metal resistance value higher than the preset resistance value threshold is represented by red; the metal capacitor lower than the preset capacitance value threshold is represented by yellow, and the metal capacitor higher than the preset capacitance value threshold is represented by green; the graphic type is selected to generate a three-dimensional distribution map; through the three-dimensional distribution map, the change pattern of the metal resistor and the metal capacitor is analyzed.

[0069] Example 2

[0070] This embodiment provides a system for detecting corrosion of fan components based on a microprobe, the system comprising a data acquisition module, a detection module, a collection module and a result output module, wherein:

[0071] The data acquisition module is used to acquire the operating data of the detection device, control the micro-probe probe at the bottom of the detection device to move on the surface of the fan component at a preset step distance, and send an AC signal of a preset frequency; transmit the operating data to the detection module;

[0072] The detection module is used for the AC signal to enter the steel structure of the fan component through the coating on the surface of the fan component, generate a capacitive effect between the coating, the microprobe and the steel structure, and record the phase change of the AC signal; construct a resistance and capacitance equivalent circuit model, and calculate the metal resistance and metal capacitance based on the phase change of the AC signal and the operating data, as detection data to reflect the metal corrosion situation and the service condition of the coating;

[0073] The collection module is used to send the detection data to the cloud using a signal transceiver; the cloud stores and analyzes the detection data in real time to predict the corrosion trend and remaining service life of the fan components;

[0074] The result output module is used to display the corrosion trend and remaining service life of the fan components.

[0075] Example 3

[0076] This embodiment provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, a method for detecting corrosion of fan components based on a microprobe as described in any embodiment of the present invention is implemented.

[0077] Example 4

[0078] This embodiment provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, a method for detecting corrosion of fan components based on a microprobe as described in any embodiment of the present invention is implemented.

[0079] It is worth noting that the system, electronic device and computer-readable storage medium described in the present invention are based on the same principles as the method described in Example 1, and will not be described in detail here.

[0080] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for detecting corrosion of fan components based on microprobes, characterized in that: The method comprises: Acquire the operating data of the detection device, control the micro-probe probe at the bottom of the detection device to move on the surface of the fan component at a preset step distance, and send out an AC signal of a preset frequency; The AC signal enters the steel structure of the fan component through the coating on the surface of the fan component, and a capacitive effect is generated between the coating, the microprobe and the steel structure, and the phase change of the AC signal is recorded; a resistance-capacitance equivalent circuit model is constructed, and based on the phase change of the AC signal and the operating data, the metal resistance and metal capacitance are calculated as detection data to reflect the metal corrosion condition and the coating service condition; The detection data is sent to the cloud using a signal transceiver; the cloud stores and analyzes the detection data in real time to predict the corrosion trend and remaining service life of the fan components.

2. A method for detecting corrosion of fan components based on microprobe according to claim 1, characterized in that: The method also includes performing data cleaning on the operation data, wherein the data cleaning includes processing missing values, abnormal values ​​and standardizing data formats.

3. The method for detecting corrosion of fan components based on microprobe according to claim 1, characterized in that: The operating data of the detection equipment include the effective value of the voltage of the fan component, the effective value of the current of the fan component, the equivalent capacitance value, the AC signal frequency, the vacuum dielectric constant, the relative dielectric constant of the coating, the metal cross-sectional area, the microprobe contact area, the distance between the microprobe and the connecting probe, the coating thickness and the total number of detection points.

4. The method for detecting corrosion of fan components based on microprobe according to claim 1, characterized in that: The phase change of the AC signal is specifically that the current amplitude of the AC signal after passing through the coating becomes The voltage value lags behind the current value by 90°, which can be expressed as: In the formula, C represents the equivalent capacitance value; f represents the frequency of the AC signal; The capacitive reactance effect corresponding to the generated capacitance effect is expressed as follows: Where, X C Indicates capacitive reactance.

5. The method for detecting corrosion of fan components based on microprobe according to claim 1, characterized in that: The total voltage and total current of the resistor-capacitor equivalent circuit model satisfy Kirchhoff's voltage law, which can be expressed as: U=U R +U C =I(R-jX C ); Where, U represents the total voltage; U R Indicates the voltage across the metal resistor; U C represents the voltage across the metal capacitor; I represents the total current; R represents the metal resistance value; C0 represents the metal capacitance; L represents the distance between the microprobe and the connecting probe; j represents the imaginary unit; ε0 represents the dielectric constant of vacuum; ε S represents the relative dielectric constant of the coating; S1 represents the metal cross-sectional area; S2 represents the microprobe contact area; d represents the coating thickness.

6. The method for detecting corrosion of fan components based on microprobe according to claim 1, characterized in that: The microprobe moves on the surface of the fan component at a preset step distance to measure the change in metal resistance, which is expressed as: ΔR=R n -R n-1 ,n=1,2,...,N; In the formula, ΔR represents the change in metal resistance; R n Indicates the resistance value of the nth detection point; n indicates the index value of the nth detection point; N indicates the total number of detection points; The metal corrosion condition and the coating service condition are judged based on the change in the metal resistance value.

7. The method for detecting corrosion of fan components based on microprobe according to claim 1, characterized in that: The method also includes using the three-dimensional structure of the metal resistor, metal capacitor and fan component to generate a three-dimensional distribution map, specifically using a three-dimensional modeling software modeling tool to obtain the three-dimensional structural data of the fan component, matching the metal resistor and metal capacitor data with corresponding positions in the three-dimensional model of the fan component based on a coordinate mapping method; using a three-dimensional visualization tool to construct a three-dimensional coordinate system according to the three-dimensional structural data of the fan component, and selecting different colors to distinguish the metal resistor and metal capacitor data; selecting a graphic type to generate a three-dimensional distribution map; and analyzing the change pattern of the metal resistor and metal capacitor through the three-dimensional distribution map.

8. A system for detecting corrosion of fan components based on microprobes, characterized in that: The system includes a data acquisition module, a detection module, a collection module and a result output module, wherein: The data acquisition module is used to acquire the operating data of the detection device, control the micro-probe probe at the bottom of the detection device to move on the surface of the fan component at a preset step distance, and send an AC signal of a preset frequency; transmit the operating data to the detection module; The detection module is used for the AC signal to enter the steel structure of the fan component through the coating on the surface of the fan component, generate a capacitive effect between the coating, the microprobe and the steel structure, and record the phase change of the AC signal; construct a resistance and capacitance equivalent circuit model, and calculate the metal resistance and metal capacitance based on the phase change of the AC signal and the operating data, as detection data to reflect the metal corrosion situation and the service condition of the coating; The collection module is used to send the detection data to the cloud using a signal transceiver; the cloud stores and analyzes the detection data in real time to predict the corrosion trend and remaining service life of the fan components; The result output module is used to display the corrosion trend and remaining service life of the fan components.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, a method for detecting corrosion of fan components based on a microprobe as described in any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, a method for detecting corrosion of fan components based on a microprobe as described in any one of claims 1 to 7 is implemented.

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