Corrosion detection method and system for overhead ground wire

Abstract

The invention discloses a corrosion detection method and system for an overhead ground wire, relates to the field of corrosion detection, and solves the problem of low detection accuracy of a traditional mode. The method comprises the steps of collecting a visible light image of an overhead ground wire; the visible light image is analyzed, visible light information is obtained, and the visible light information comprises a preliminary judgment result indicating whether the overhead ground wire is in a corrosion state or not; under the condition that the overhead ground wire is determined to be in the corrosion state, collecting infrared spectrum information of the overhead ground wire; the infrared spectrum information is analyzed to obtain spectrum characteristics, and the spectrum characteristics are used for indicating substances of corrosion products; determining the corrosion level of the overhead ground wire based on the visible light information and the spectral characteristics; and executing a corresponding alarm operation based on the corrosion level. The characteristics of different substances can be identified by using the infrared spectrum, the corrosion level is determined based on the visible light information and the spectral characteristics, and the corrosion condition of the overhead ground wire can be detected more accurately.

Description

Technical Field

[0001] The present invention relates to the technical field of corrosion detection, and particularly to a method and system for detecting the corrosion of overhead ground wires. Background Art

[0002] An overhead ground wire, also known as a lightning protection wire, refers to a wire directly connected to the ground on high-voltage and extra-high-voltage lines. The overhead ground wire is used to reduce the probability of direct lightning strikes on the line and also to divert a part of the lightning current to the ground when lightning strikes the line, thereby improving the lightning withstand level of the line.

[0003] The overhead ground wire is an essential part for the stable operation of the power system. Due to being exposed to the natural environment for a long time, the overhead ground wire is vulnerable to the effects of atmospheric corrosion, chemical corrosion, and electrochemical corrosion, resulting in a decrease in its mechanical strength and electrical conductivity, and even potentially causing fractures or grounding faults, seriously affecting the safe and stable operation of the power system. Therefore, it is necessary to detect the corrosion condition of the overhead ground wire in a timely manner to avoid power failures.

[0004] Currently, general maintenance personnel conduct on-site inspections, or collect on-site images and remotely judge the corrosion condition of the overhead ground wire. However, the overhead ground wire consists of an outer metal material and an inner metal material, and there are many products generated by the corrosion of different metal materials, and the corrosion situation is complex. The manual inspection method is difficult to accurately detect the corrosion condition of the overhead ground wire, and it is even more difficult to take appropriate operation and maintenance measures.

[0005] In view of this, there is a need for a method and system for detecting the corrosion of overhead ground wires to accurately detect the corrosion condition of the overhead ground wire, achieve a more scientific and rigorous corrosion level classification, predict the corrosion life, and perform corresponding full-life cycle management. Summary of the Invention

[0006] Aiming at the problem that it is difficult to accurately detect the corrosion condition of the overhead ground wire in the prior art, the present invention provides a method and system for detecting the corrosion of the overhead ground wire, which can accurately detect the corrosion condition of the overhead ground wire. The specific technical solutions are as follows:

[0007] A method for detecting the corrosion of an overhead ground wire, the method comprising: collecting a visible light image of the overhead ground wire; analyzing the visible light image to obtain visible light information of the overhead ground wire, the visible light information including a preliminary judgment result for indicating whether the overhead ground wire is in a corrosion state; in the case where the preliminary judgment result indicates that the overhead ground wire is in the corrosion state, collecting infrared spectral information of the overhead ground wire; analyzing the infrared spectral information to obtain spectral characteristics of the overhead ground wire, the spectral characteristics being used to indicate the substances of the corrosion products of the overhead ground wire; determining the corrosion level of the overhead ground wire based on the visible light information and the spectral characteristics; and performing an alarm operation corresponding to the corrosion level based on the corrosion level.

[0008] Preferably, determining the corrosion grade of the overhead ground wire based on the visible light information and spectral characteristics includes: determining the remaining mechanical properties of the overhead ground wire based on the visible light image and / or the spectral characteristics; wherein the remaining mechanical properties are used to indicate the tensile capacity of the overhead ground wire in the current state; and determining the corrosion grade of the overhead ground wire based on the visible light image, the spectral characteristics, and the remaining mechanical properties.

[0009] Preferably, after determining the corrosion grade of the overhead ground wire based on the visible light image, the spectral characteristics, and the remaining mechanical properties, the method further includes: determining the remaining life of the overhead ground wire based on the corrosion grade, a preset maximum corrosion grade, and a metal corrosion rate formula corresponding to the location where the overhead ground wire is located; wherein the maximum corrosion grade is used to indicate the state where the overhead ground wire is corroded and scrapped; and performing an alarm operation corresponding to the corrosion grade based on the corrosion grade, including: performing the alarm operation based on the corrosion grade and the remaining life.

[0010] Preferably, analyzing the visible light image to obtain the visible light information of the overhead ground wire includes: comparing the features of the visible light image with the images in a preset first database to obtain a first comparison result; wherein the first database includes visible light images of overhead ground wires in different degrees of corrosion states; determining whether the overhead ground wire is in the corrosion state based on the first comparison result to obtain a preliminary judgment result; and determining the corrosion grade of the overhead ground wire based on the visible light information and the spectral characteristics includes: comparing the features of the spectral characteristics with the information in a preset second database to obtain a second comparison result; wherein the second database includes infrared spectral information of overhead ground wires in different degrees of corrosion states; and determining the corrosion grade of the overhead ground wire based on the first comparison result and the second comparison result.

[0011] Preferably, analyzing the visible light image to obtain the visible light information of the overhead ground wire includes: inputting the visible light image into a preset first artificial intelligence (AI) model to obtain the visible light information output by the first AI model; wherein the first AI model is an AI model trained based on visible light images of overhead ground wires in different degrees of corrosion states; and determining the corrosion grade of the overhead ground wire based on the visible light information and the spectral characteristics includes: inputting the visible light information and the spectral characteristics into a preset second AI model to obtain the corrosion grade of the overhead ground wire output by the second AI model; wherein the second AI model is an AI model trained based on the visible light information and spectral characteristics of overhead ground wires in different degrees of corrosion states.

[0012] Preferably, based on the corrosion level, an alarm operation corresponding to the corrosion level is performed, including: when the corrosion level is the preset highest corrosion level, determining whether the conclusion that the corrosion level is the highest corrosion level is true based on the visible light image, the infrared spectrum information, the third database, and the fourth database; wherein, the third database includes visible light images and / or infrared spectrum information of the entire life cycle of the overhead ground wire, and the fourth database includes the corrosion detection historical data of the overhead ground wire; when the conclusion is true, a scrapping alarm message is output through an output device, and the scrapping alarm message is used to instruct maintenance personnel to manually judge whether it is necessary to scrap the overhead ground wire.

[0013] A corrosion detection system for an overhead ground wire, the system includes a detection part and a control part, the detection part includes a flight module, a spectral camera, a visible light camera, a calculation module, and a control module; the control module is used to receive the control instruction of the control part, control the flight module to fly to the corresponding position based on the control instruction, and control the visible light camera to collect the visible light image of the overhead ground wire; the calculation module is used to analyze the visible light image to obtain the visible light information of the overhead ground wire, and the visible light information includes a preliminary judgment result for indicating whether the overhead ground wire is in a corrosion state; the control module is further used to control the spectral camera to collect the infrared spectrum information of the overhead ground wire when the preliminary judgment result indicates that the overhead ground wire is in the corrosion state; the calculation module is further used to analyze the infrared spectrum information to obtain the spectral characteristics of the overhead ground wire, and the spectral characteristics are used to indicate the substance of the corrosion product of the overhead ground wire; the calculation module is further used to determine the corrosion level of the overhead ground wire based on the visible light information and the spectral characteristics; the control module is further used to perform an alarm operation corresponding to the corrosion level based on the corrosion level.

[0014] Preferably, the flight module includes a drone.

[0015] Preferably, the detection part further includes a spectral calibration module, and the spectral calibration module is used to calibrate the spectral parameters for the spectral camera.

[0016] Preferably, the spectral calibration module is arranged at the top of the detection part.

[0017] Compared with the prior art, the beneficial effects of the present invention are: by combining the visible light image and the infrared spectrum information, using the characteristic that the infrared spectrum can "fingerprint" different substances, and jointly determining the corrosion level of the overhead ground wire by combining the spectral characteristics and visible light information that can indicate the substance composition of the corrosion product, the corrosion condition of the overhead ground wire can be detected more accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0019] Figure 1 It is a schematic flow chart of a method for detecting the corrosion of an overhead ground wire provided by an embodiment of the present application;

[0020] Figure 2 It is a schematic flow chart of another method for detecting the corrosion of an overhead ground wire provided by an embodiment of the present application;

[0021] Figure 3 It is a schematic structural diagram of a system for detecting the corrosion of an overhead ground wire provided by an embodiment of the present application. Specific Embodiments

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0023] It should be understood that when used in this specification and the appended claims, the terms "comprises" and "comprising" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0024] It should also be understood that the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0025] It should be further understood that the term "and / or" used in the specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0026] To solve the technical problem in the current overhead ground wire corrosion detection technology that it is difficult to accurately detect the corrosion of the metal material of the overhead ground wire, the embodiments of this application provide a corrosion detection method and system for overhead ground wires, which can not only more accurately detect the corrosion of overhead ground wires, but also realize the life prediction of overhead ground wires, providing a more scientific and effective technical means for the full life cycle management of overhead ground wires.

[0027] Please refer to Figure 1 , Figure 1 which is a schematic flowchart of a corrosion detection method for an overhead ground wire provided by an embodiment of this application. This method can be applied to devices or systems with visible light image acquisition capabilities, infrared spectrum information acquisition capabilities, and computing capabilities. In the following, a detection system (referred to as the detection system for short) with the above capabilities is used as the execution subject of this method for illustration. As Figure 1 shown, this method includes the following steps:

[0028] Step 101, the detection system acquires a visible light image of the overhead ground wire.

[0029] Among them, the detection system can acquire a visible light image of the overhead ground wire through its components with visible light image acquisition capabilities. Exemplarily, the detection system can use devices such as drones or robot dogs to approach the overhead ground wire in different terrains and find appropriate shooting angles and distances to acquire visible light images.

[0030] Step 102, the detection system analyzes the visible light image to obtain the visible light information of the overhead ground wire.

[0031] After acquiring the visible light image of the overhead ground wire, the detection system can analyze and calculate the visible light image, and then obtain the visible light information of the overhead ground wire. Among them, the visible light information includes a preliminary judgment result for indicating whether the overhead ground wire is in a corrosion state. Optionally, the visible light information further includes line body information and information on whether the overhead ground wire is broken-stranded.

[0032] In a possible implementation, the detection system can compare the features of the visible light image with the images in a preset first database to obtain a first comparison result; then based on the first comparison result, determine whether the overhead ground wire is in the corrosion state to obtain a preliminary judgment result.

[0033] Among them, the first database includes visible light images of overhead ground wires in different degrees of corrosion states.

[0034] It can be understood that other information in the visible light information can be obtained by the detection system based on the comparison of the visible light image and the images in the first database, or based on the comparison of the visible light image and the data in other databases.

[0035] Specifically, currently, the commonly used materials for overhead ground wires are aluminum-clad steel and galvanized steel strands. The metal corrosion involved includes aluminum, zinc, and steel. Therefore, the corrosion mechanism of overhead ground wires involves the corrosion processes of aluminum, zinc, and steel. It can be understood that the main basis for initially judging whether the overhead ground wire is in a corroded state is the corrosion amount of the aluminum metal layer and the zinc metal layer. Subsequently, to determine the corrosion grade and life prediction of the overhead ground wire, it depends on the cross-sectional corrosion amount of the inner steel metal layer, that is, the current tensile bearing capacity of the overhead ground wire.

[0036] Therefore, the first database includes the collected corrosion images of aluminum or zinc materials, as well as the visible light images of overhead ground wires in different degrees of corrosion states.

[0037] Similarly, when the detection system executes step 105 below, it can compare the obtained spectral characteristics and visible light information with the information in the preset second database to obtain a second comparison result; then, based on the first comparison result and the second comparison result, determine the corrosion grade of the overhead ground wire.

[0038] Among them, the second database includes the infrared spectral information and / or spectral characteristics of overhead ground wires in different corrosion grades. It can be understood that when the second database includes infrared spectral information, the detection system can first extract the spectral characteristics of the infrared spectral information and then compare them with the spectral characteristics of the currently detected overhead ground wire.

[0039] In addition, the detection system can also set the highest corrosion grade of the overhead ground wire according to the overhead ground wire scrapping standard, collect the spectral information of the overhead ground wire corresponding to this corrosion state or with a higher degree of corrosion, and store it in the second database.

[0040] In another possible implementation, the detection system can input the visible light image into a preset first artificial intelligence (AI) model to obtain the visible light information output by the first AI model.

[0041] Among them, the first AI model is an AI model trained based on the visible light images of overhead ground wires in different degrees of corrosion states. Specifically, the detection system can pre-establish the above-mentioned first database and train the first AI model based on the visible light images in the first database.

[0042] Exemplarily, the detection system can extract the multi-dimensional feature parameter information of the training samples through analysis methods such as image preprocessing, colorimetry, and statistics, and adjust the parameters of the first AI model based on the multi-dimensional feature parameter information to obtain an AI model that can accurately classify the visible light images of overhead ground wires in corroded and non-corroded states.

[0043] Optionally, the first AI model includes a machine learning model, a neural network model, or a large model.

[0044] Similarly, when the detection system executes step 105 below, it can input the spectral feature and visible light information into a preset second AI model to obtain the corrosion level of the overhead ground wire.

[0045] Among them, the second AI model is an AI model trained based on the spectral features of overhead ground wires in different degrees of corrosion states. Specifically, the detection system can pre-establish the above-mentioned second database and train the second AI model based on the infrared spectral information in the second database.

[0046] Step 103: When the preliminary judgment result indicates that the overhead ground wire is in the corrosion state, the detection system collects the infrared spectral information of the overhead ground wire.

[0047] After determining that the overhead ground wire is in the corrosion state, the detection system needs to further determine the corrosion degree of the overhead ground wire. At this time, the detection system can activate a component with the ability to collect infrared spectral information to collect the infrared spectral information of the overhead ground wire. Based on the characteristic of infrared spectrum to "fingerprint" different substances, the specific situation of the corrosion products of the current overhead ground wire can be determined.

[0048] Step 104: The detection system analyzes the infrared spectral information to obtain the spectral feature of the overhead ground wire.

[0049] Among them, the detection system can analyze the infrared spectral information based on the absorption spectrometry to obtain the spectral feature. Specifically, the absorption spectrometry is a method for quantitative and qualitative analysis of substances according to the fact that due to different structures, various substances have different absorptions of electromagnetic waves, and each substance has its characteristic absorption spectrum. Therefore, the detection system can at least determine the substance composition, state, and quantity of the corrosion products of the overhead ground wire based on the spectral feature.

[0050] It can be understood that the detection system can also obtain the spectral feature based on other analysis methods, and the embodiments of the present application do not make specific limitations in this regard.

[0051] Step 105: The detection system determines the corrosion level of the overhead ground wire based on the visible light information and the spectral feature.

[0052] Among them, the corrosion level is preset based on national standards / industry standards / association standards. The detection system can analyze the corrosion product information corresponding to the spectrum through absorption spectrometry based on the infrared spectral information of 900nm - 2500nm of the overhead ground wire, and then determine the corrosion level of the overhead ground wire based on this corrosion product information.

[0053] Exemplarily, the national standard / industry standard / group standard includes GB / T 19292.1-2003, GB / T 6461-2002, GB / T 10123-2001, ISO 9223, DL / T 1424, and T / CEC 401. It can be understood that the corrosion grade can be set based on multiple standards to cover corrosion conditions in different scenarios.

[0054] Step 106: The detection system performs an alarm operation corresponding to the corrosion grade based on the corrosion grade.

[0055] After determining the corrosion grade of the overhead ground wire, the detection system can perform an alarm operation corresponding to the corrosion grade according to a preset alarm strategy.

[0056] Optionally, when the corrosion grade is a general corrosion grade, the detection system can update the status data of the overhead ground wire to the corresponding database; when the corrosion grade is a medium corrosion grade, the detection system can change the inspection strategy and inspect the overhead ground wire more frequently; when the corrosion grade is the highest corrosion grade, the detection system can output an alarm message to an output device that can be sensed by maintenance personnel, requesting the maintenance personnel to intervene for judgment or perform a scrapping operation.

[0057] In the embodiments of the present application, by combining visible light images and infrared spectrum information, and using the characteristic that infrared spectrum can "fingerprint" different substances, the corrosion grade is determined based on the spectral characteristics that can indicate the material composition of corrosion products, and the corrosion condition of the overhead ground wire can be detected more accurately.

[0058] Preferably, the detection system can determine the remaining mechanical properties of the overhead ground wire based on the visible light image and / or the spectral characteristics; then, based on the visible light image, the spectral characteristics, and the remaining mechanical properties, determine the corrosion grade of the overhead ground wire.

[0059] Wherein, the remaining mechanical properties are used to indicate the tensile capacity of the overhead ground wire in the current state.

[0060] Before implementing the method of the embodiments of the present application, maintenance personnel can obtain overhead ground wires in different corrosion states in the laboratory and various actual sites, and conduct tensile capacity tests on these overhead ground wires to obtain the tensile capacity data of the overhead ground wires in different corrosion states. Further, the detection system can analyze information such as the texture, color, and contour of the overhead ground wire through the visible light image information of these overhead ground wires in different corrosion states, analyze the characteristic absorption spectrum information of the corrosion products of the overhead ground wire through the infrared spectrum information, and combine the mechanical properties of the remaining part after the overhead ground wire is corroded. Based on these three aspects, the corrosion grade of the overhead ground wire is jointly determined. In this way, the characteristic ranges of the overhead ground wire in these three dimensions under different corrosion grades can be obtained more accurately.

[0061] Conversely, after establishing the database of the above-mentioned "figure-spectrum-mechanical property" correlation relationship, the detection system can accurately obtain the current remaining mechanical properties of the overhead ground wire based on the currently acquired visible light image and infrared spectrum information, and then through the combination of the three, the current corrosion grade of the overhead ground wire can be accurately determined.

[0062] Preferably, after determining the corrosion grade of the overhead ground wire based on the visible light image, the infrared spectrum information, and the remaining mechanical properties, the detection system can further determine the remaining life of the overhead ground wire based on the corrosion grade, the preset highest corrosion grade, and the metal corrosion rate formula corresponding to the location where the overhead ground wire is located; then based on the corrosion grade and the remaining life, perform the alarm operation.

[0063] Among them, the highest corrosion grade is used to indicate that the overhead ground wire is in a state of corrosion and scrapping.

[0064] Among them, the detection system can pre-obtain the metal corrosion rate formula corresponding to the location where the overhead ground wire is located. Exemplarily, when calculating the remaining life of the overhead ground wire, the detection system can calculate the minimum life of the overhead ground wire by applying the metal corrosion rate formula based on the minimum corrosion value under the highest corrosion grade and the maximum corrosion value under the corrosion grade, so that maintenance personnel can manage the life of the overhead ground wire as soon as possible and improve the safety of the power system.

[0065] Exemplarily, the metal corrosion rate formula can be an atmospheric corrosion rate formula, which is applicable to the scenario of corrosion detection in the atmospheric environment. The formula is specifically:

[0066] Corrosion rate = K * C * t / A

[0067] Among them, K is the environmental coefficient, C is the corrosion medium concentration, t is the exposure time, and A is the specimen surface area.

[0068] It can be understood that the detection system can select an appropriate metal corrosion rate formula based on the location of the overhead ground wire, the ambient temperature, humidity, and air composition to calculate the remaining life of the overhead ground wire.

[0069] After determining the remaining life, when the detection system performs an alarm operation and outputs an alarm message, the remaining life can be added to the alarm message.

[0070] In the embodiments of the present application, by constructing a mapping relationship between the remaining mechanical properties of the overhead ground wire and the corrosion grade, the life exhaustion of the overhead ground wire is measured by the tensile capacity of the overhead ground wire required by the power-related standards. The corrosion grade evaluation algorithm of the overhead ground wire meets the actual application requirements of the overhead ground wire and can meet the business requirements of the daily production of the power industry.

[0071] In addition, by calculating the life of the overhead ground wire according to the metal corrosion rate formula corresponding to the on-site environment, the life management of the overhead ground wire is realized, and a more accurate predicted life result can be obtained.

[0072] Preferably, when the corrosion grade is the highest corrosion grade, the detection system can determine whether the conclusion that the corrosion grade is the highest corrosion grade is true based on the visible light image, the infrared spectrum information, the third database, and the fourth database; when the conclusion is true, a scrapping alarm message is output through an output device.

[0073] The third database includes visible light images and / or infrared spectrum information of the entire life cycle of the overhead ground wire, and the fourth database includes the corrosion detection historical data of the overhead ground wire.

[0074] The scrapping alarm message is used to instruct the maintenance personnel to manually judge whether the overhead ground wire needs to be scrapped.

[0075] After determining that the corrosion grade is the highest corrosion grade, the detection system can compare the obtained visible light image and / or infrared spectrum information of the overhead ground wire with the corresponding data in the third database and the fourth database to further verify whether the conclusion is true; when it is determined that the conclusion is true, a scrapping alarm message is output to an output device that can be perceived by the maintenance personnel.

[0076] In the embodiments of the present application, by re-verifying the highest corrosion grade, the situation of wasting the labor of the maintenance personnel caused by misjudgment can be avoided.

[0077] A specific method embodiment will be provided below to facilitate a better understanding of the method provided by the embodiments of the present application.

[0078] Please refer to Figure 2 , Figure 2Schematic flowchart of another method for detecting the corrosion of the overhead ground wire provided by an embodiment of the present application. As Figure 2 shown, first, the detection system is triggered by events such as periodic inspections, annual inspections, and emergency inspections to start collecting inspection data. Among them, when the detection system starts an inspection, it can be manually operated by maintenance personnel to achieve the inspection, or it can execute a preset program to achieve the inspection according to a preset path and operation instructions.

[0079] During the inspection process, the detection system collects site information such as the position, temperature, humidity, and distance from the shooting position of the overhead ground wire, visible light images of the overhead ground wire, and equipment asset information such as the time when the equipment was put into use, the service life, and the line material.

[0080] Through the collected visible light images, the detection system can call the first database to analyze whether the overhead ground wire is in a corroded state and whether it has broken strands, and obtain the visible light information of the overhead ground wire. After determining that the overhead ground wire is in a corroded state, on the one hand, the detection system can obtain the basic information of the equipment to which the overhead ground wire belongs, and further judge the corrosion program of the current overhead ground wire in combination with the first database to obtain the first corrosion information; on the other hand, the detection system can collect infrared spectrum information and analyze its spectral characteristics, and call the second database to match and compare with the spectral characteristics to obtain the second corrosion information; then, the detection system can jointly determine the corrosion level based on the first corrosion information and the second corrosion information, and correct the calculation result in combination with the site information.

[0081] Exemplarily, the detection system can calculate the influence of environmental factors on the corrosion rate based on the position, temperature, and humidity information in the site information, and calculate the theoretical corrosion degree of the overhead ground wire in combination with the equipment service life information; then calculate the corrosion information error caused by the shooting distance and shooting angle factors; finally, correct the corrosion level in combination with the theoretical corrosion degree and the corrosion information error.

[0082] By using visible light images for preliminary prediction, infrared spectrum information for corrosion level analysis and evaluation, and site information for final result correction, the detection system can accurately reflect the corrosion level of the overhead ground wire.

[0083] When the corrosion level is determined to be the general corrosion level, the detection system can output general warning information to an output device that can be perceived by maintenance personnel; when the corrosion level is determined to be the highest corrosion level, the detection system will call the above-mentioned third database (overhead ground wire full life cycle stage database) and the fourth database (overhead ground wire corrosion detection history database) to verify whether the judgment conclusion of the highest corrosion level is true; after determining it is true, the detection system will output a scrapping warning instruction to the output device.

[0084] Due to the severity of the scrap warning event, it is necessary to increase manual comprehensive analysis and judgment. If the result of the analysis shows that the overhead ground wire has not reached the scrap standard and can still be used, emergency inspection and control measures will be implemented; if the result of the analysis shows that the overhead ground wire has reached the scrap standard, the maintenance personnel will implement the management measures of scrapping and replacement. At this point, the full life cycle management of the overhead ground wire has entered the end of life stage.

[0085] Before executing the above detection method, the detection system can be preset with corrosion pre-analysis based on visible light image information, and intelligent recognition algorithm for calibration of overhead ground wire corrosion level based on infrared spectral feature information. The algorithm is trained with laboratory standardized specimens and on-site overhead ground wire objects, and the training is determined to be completed under the condition that the recognition accuracy is greater than 90%. In addition, an intelligent prediction algorithm for the life of overhead ground wires based on multi-dimensional information such as spectral feature information, mechanical properties, and time series can also be preset, and trained with standardized laboratory samples. Before the detection system is put into use, the detection system also needs to carry out actual scene simulation environment and engineering site field testing to optimize the prototype software and hardware functions and performance.

[0086] After the implementation of the embodiment of the present application, the workload of operation and maintenance inspection personnel can be effectively reduced. There is no need for high-altitude operations, and qualitative and semi-quantitative detection of corrosion can be performed, which is convenient for inspection personnel to make objective judgments and operate and maintain overhead ground wires, and is convenient for recording, preserving, and calling up analysis of data over the entire life cycle of overhead ground wires.

[0087] The embodiments of the present application are the first to break through new technologies and applications for overhead ground wire corrosion assessment and life prediction, which can meet the business needs of the power industry for intelligence, digitization, and unmanned operations, and provide a data source for the operation and maintenance and life management of power industry facilities.

[0088] The above part describes the method provided in the embodiment of the present application, and the following part describes a corrosion detection system for an overhead ground wire provided in the embodiment of the present application. It can be understood that in practical applications, the corrosion detection system that performs the above corrosion detection method may include more or fewer components than the structure of the corrosion detection system described below. Following the ideas provided in the embodiment of the present application, the system for implementing the method of the embodiment of the present application obtained by simply replacing or changing the components of the structure is within the scope of protection of the present application.

[0089] See also Figure 3 , Figure 3 A structural diagram of a corrosion detection system for an overhead ground wire provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, the corrosion detection system 3 includes a detection part 31 and a control part 32 . The detection part 31 includes a flight module 311 , a spectral camera 312 , a visible light camera 313 , a calculation module 314 , and a control module 315 .

[0090] The control module 315 is configured to receive the control instructions from the control section 32, control the flight module 311 to fly to the corresponding position based on the control instructions, and control the visible light camera 313 to collect visible light images of the overhead ground wire;

[0091] The calculation module 314 is configured to analyze the visible light images to obtain visible light information of the overhead ground wire, where the visible light information includes a preliminary judgment result for indicating whether the overhead ground wire is in a corroded state;

[0092] The control module 315 is further configured to control the spectral camera 312 to collect infrared spectral information of the overhead ground wire when the preliminary judgment result indicates that the overhead ground wire is in the corroded state;

[0093] The calculation module 314 is further configured to analyze the infrared spectral information to obtain spectral characteristics of the overhead ground wire, where the spectral characteristics are used to indicate the substances of the corrosion products of the overhead ground wire;

[0094] The calculation module 314 is further configured to determine the corrosion grade of the overhead ground wire based on the visible light information and the spectral characteristics;

[0095] The control module 315 is further configured to perform an alarm operation corresponding to the corrosion grade based on the corrosion grade.

[0096] Among them, the flight module 311 is an inspection flight tool of the corrosion detection system 3. Preferably, the flight module 311 includes a drone. Among them, the spectral camera 312, the visible light camera 313, the calculation module 314, and the control module 315 can share the power supply and communicator with the drone.

[0097] Among them, the detection section 31 further includes a lens 1 of the visible light camera 313 and a lens 2 of the spectral camera 312.

[0098] The control section 32 can be used to manually control the flight module 311, and at the same time display relevant data, collected images and other information of the flight module 311, the visible light camera 313, and the spectral camera 312.

[0099] The spectral camera 312 is used to collect infrared spectral information of the overhead ground wire, and its form can adopt hyperspectral, ultraspectral and multispectral imaging mechanisms. The spectral bands in multispectral imaging need to be selected according to the characteristic spectra of the products in different corrosion stages of the overhead ground wire in different environments.

[0100] The visible light camera 313 is used to collect visible light images of the overhead ground wire. Preferably, the visible light camera 313 includes a high-definition camera.

[0101] The calculation module 314 is used for edge calculation of on-site images and spectral information. Preferably, the calculation module 314 includes a small high-speed computing computer.

[0102] The control module 315 includes control circuits of the visible light camera 313 , the spectral camera 312 , and the computing module 314 .

[0103] Preferably, the detection part 31 further includes a spectrum correction module 316, and the spectrum correction module 316 is used to calibrate spectrum parameters for the spectrum camera 312. Exemplarily, the spectrum correction module 316 is a standard reflectivity plate.

[0104] Preferably, the spectrum correction module 316 is disposed on the top of the detection portion 31 .

[0105] When the spectrum correction module 316 is disposed on the top of the detection portion 31 , the spectrum calibration module 316 can calibrate the spectrum camera based on the zenith light.

[0106] Preferably, the visible light camera 313 and the spectral camera 312 may include respective memories for storing the collected data, and the storage time is longer than the cruising time of the flight module 311 .

[0107] The embodiment of the present application adopts the spectrum analysis technology of "visible light + infrared spectrum" to obtain the corrosion image and corrosion product composition information of the overhead ground wire; the corrosion level is determined by the difference in visible light image information and infrared spectrum identification information of corrosion products at different corrosion stages; the life of the overhead ground wire is predicted by the evaluation and prediction of the corrosion rate; and the overhead ground wire corrosion inspection and maintenance management method is given. The embodiment of the present application is more scientific, rigorous and accurate in the corrosion level classification method, and it is the first to create a corrosion life prediction technical method, providing a more scientific and effective technical means for the full life cycle management of the overhead ground wire.

[0108] Those of ordinary skill in the art will appreciate that the units of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition of each example has been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0109] In the embodiments provided by the present invention, it should be understood that the division of units is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units can be combined into one unit, one unit can be split into multiple units, or some features can be ignored, etc.

[0110] In addition, in each embodiment of the present invention, each functional unit can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0111] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, read-only memories (ROMs), random access memories (RAMs), mobile hard disks, magnetic disks, or optical discs.

[0112] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of each embodiment of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

Claims

1. A method for detecting corrosion of an overhead ground wire, characterized in that: The method comprises: Collect visible light images of overhead ground wires; Analyzing the visible light image to obtain visible light information of the overhead ground wire, wherein the visible light information includes a preliminary judgment result indicating whether the overhead ground wire is in a corroded state; When the preliminary determination result indicates that the overhead ground wire is in the corroded state, collecting infrared spectrum information of the overhead ground wire; Analyzing the infrared spectrum information to obtain spectrum characteristics of the overhead ground wire, wherein the spectrum characteristics are used to indicate substances of corrosion products of the overhead ground wire; Determining a corrosion level of the overhead ground wire based on the visible light information and the spectral characteristics; Based on the corrosion level, an alarm operation corresponding to the corrosion level is performed.

2. The method according to claim 1, characterized in that The step of determining the corrosion level of the overhead ground wire based on the visible light information and the spectral characteristics includes: Based on the visible light image and / or the spectral feature, determining the residual mechanical properties of the overhead ground wire; wherein the residual mechanical properties are used to indicate the tensile strength of the overhead ground wire in the current state; The corrosion level of the overhead ground wire is determined based on the visible light image, the spectral characteristics and the residual mechanical properties.

3. The method according to claim 2, characterized in that After determining the corrosion level of the overhead ground wire based on the visible light image, the spectral characteristics and the residual mechanical properties, the method further includes: Determine the remaining life of the overhead ground wire based on the corrosion level, the preset maximum corrosion level, and the metal corrosion rate formula corresponding to the location of the overhead ground wire; wherein the maximum corrosion level is used to indicate that the overhead ground wire is in a state of corrosion and scrapping; The performing an alarm operation corresponding to the corrosion level based on the corrosion level includes: The warning operation is performed based on the corrosion level and the remaining life.

4. The method according to claim 1, characterized in that: The analyzing the visible light image to obtain the visible light information of the overhead ground wire includes: Performing feature comparison between the visible light image and an image in a preset first database to obtain a first comparison result; wherein the first database includes visible light images of overhead ground wires in different degrees of corrosion; Determine whether the overhead ground wire is in the corroded state based on the first comparison result, and obtain the preliminary judgment result; The step of determining the corrosion level of the overhead ground wire based on the visible light information and the spectral characteristics includes: Compare the spectral features with the information in a preset second database to obtain a second comparison result; wherein the second database includes infrared spectral information of overhead ground wires in different degrees of corrosion; The corrosion level of the overhead ground wire is determined based on the first comparison result and the second comparison result.

5. The method according to claim 1, characterized in that: The analyzing the visible light image to obtain the visible light information of the overhead ground wire includes: Inputting the visible light image into a preset first artificial intelligence AI model to obtain visible light information output by the first AI model; wherein the first AI model is an AI model trained based on visible light images of overhead ground wires in different degrees of corrosion; The step of determining the corrosion level of the overhead ground wire based on the visible light information and the spectral characteristics includes: The visible light information and the spectral characteristics are input into a preset second AI model to obtain the corrosion level of the overhead ground wire output by the second AI model; wherein the second AI model is an AI model trained based on the visible light information and spectral characteristics of the overhead ground wire under different degrees of corrosion status.

6. The method according to any one of claims 1 to 5, characterized in that The performing an alarm operation corresponding to the corrosion level based on the corrosion level includes: In the case where the corrosion level is the preset highest corrosion level, determining whether the conclusion that the corrosion level is the highest corrosion level is true based on the visible light image, the infrared spectrum information, the third database and the fourth database; wherein the third database includes visible light images and / or infrared spectrum information of the entire life cycle stage of the overhead ground wire, and the fourth database includes historical corrosion detection data of the overhead ground wire; In the case where the conclusion is true, scrapping alarm information is outputted through the output device, and the scrapping alarm information is used to instruct the maintenance personnel to manually determine whether the overhead ground wire needs to be scrapped.

7. A corrosion detection system for overhead ground wires, characterized in that: The system includes a detection part and a control part, wherein the detection part includes a flight module, a spectral camera, a visible light camera, a computing module, and a control module; The control module is used to receive the control instruction of the control part, control the flight module to fly to the corresponding position based on the control instruction, and control the visible light camera to collect the visible light image of the overhead ground wire; The calculation module is used to analyze the visible light image to obtain visible light information of the overhead ground wire, wherein the visible light information includes a preliminary judgment result indicating whether the overhead ground wire is in a corroded state; The control module is further configured to control the spectral camera to collect infrared spectral information of the overhead ground wire when the preliminary judgment result indicates that the overhead ground wire is in the corroded state; The calculation module is also used to analyze the infrared spectrum information to obtain the spectrum characteristics of the overhead ground wire, and the spectrum characteristics are used to indicate the substance of the corrosion product of the overhead ground wire; The calculation module is also used to determine the corrosion level of the overhead ground wire based on the visible light information and the spectral characteristics; The control module is further configured to execute an alarm operation corresponding to the corrosion level based on the corrosion level.

8. The system according to claim 7, characterized in that The flight module includes a drone.

9. The system according to claim 7 or 8, characterized in that: The detection part also includes a spectrum correction module, and the spectrum correction module is used to calibrate spectrum parameters for the spectrum camera.

10. The system according to claim 9, characterized in that The spectrum correction module is arranged on the top of the detection part.

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