A new test method for the salt spray corrosion resistance of 10kV pole-mounted recloser poles

Abstract

The present invention relates to the technical field of recloser corrosion testing, and specifically to a new type of 10kV pole recloser pole anti-salt spray corrosion testing method, comprising: first obtaining a monitoring point coordinate information set and a video frame image set of a new type and a traditional pole recloser pole, analyzing the contour difference characteristics and local salt spray accumulation characteristics of the recloser pole according to the monitoring point coordinate information set, determining the corrosion analysis weight of each monitoring point, and then analyzing the time domain corrosion degree change characteristics of each monitoring point according to the corrosion analysis weight and the video frame image set, determining the salt spray corrosion resistance index of the new pole recloser pole, and finally determining the quality grade of the new pole recloser pole according to the salt spray corrosion resistance index. The present invention effectively improves the accuracy of the salt spray corrosion resistance test results by determining the salt spray corrosion resistance index through the corrosion analysis weights of different monitoring points and the time domain corrosion degree change characteristics.

Description

Technical Field

[0001] The invention relates to the technical field of recloser corrosion testing, and in particular to a novel salt spray corrosion resistance testing method for a 10kV pole-mounted recloser pole. Background Art

[0002] The pole-mounted recloser is an intelligent switching device for distribution network automation. Traditional pole-mounted reclosers often use a sealed pole structure, but the visibility of the epoxy resin used in the sealed pole is poor, which makes it impossible for operators to accurately observe the operating status of the vacuum arc chamber inside the pole, and thus cannot conduct a detailed analysis of the cause of short circuit or overload. Therefore, a new type of 10kV pole-mounted recloser has been introduced, which realizes the visualization of the working status of the vacuum arc chamber inside the pole by adding a transparent observation window to the vacuum arc chamber inside the sealed pole. However, the transparent observation window is made of other composite materials, which to a certain extent reduces the salt spray corrosion resistance of the pole-mounted recloser, resulting in reduced insulation of the pole. Therefore, in order to ensure that the equipment can work stably in various environments, it is necessary to test the salt spray corrosion resistance of the pole of the new 10kV pole-mounted recloser.

[0003] The existing salt spray corrosion resistance test method for the pole of the new 10kV pole-mounted recloser is often a charged neutral salt spray corrosion test, that is, a certain concentration of chloride solution is continuously applied to the pole of the pole-mounted recloser under the condition of power on, and the corrosion of the pole is observed after 1000 hours to judge the salt spray corrosion resistance of the pole. The existing salt spray corrosion resistance test directly determines the salt spray corrosion resistance based on the corrosion results, and it conducts consistency evaluation on the corrosion conditions of various positions in the pole-mounted recloser, but the consistency evaluation test method reduces the accuracy of judging the salt spray corrosion resistance of the pole of the new 10kV pole-mounted recloser. Summary of the invention

[0004] In order to solve the above-mentioned technical problem of low accuracy in judging the salt spray corrosion resistance of the existing method, the object of the present invention is to provide a novel salt spray corrosion resistance test method for 10kV pole-mounted recloser poles, and the technical scheme adopted is as follows:

[0005] An embodiment of the present invention provides a novel salt spray corrosion resistance test method for a 10kV pole-mounted recloser pole, the method comprising the following steps:

[0006] First, a set of monitoring point coordinate information of the new pole-mounted recloser pole and the traditional pole-mounted recloser pole is obtained, and then a set of video frame images of the new pole-mounted recloser pole and the traditional pole-mounted recloser pole during the test process is obtained;

[0007] Analyze the contour difference characteristics and local salt fog accumulation characteristics of the recloser pole according to the set of monitoring point coordinate information, and determine the corrosion analysis weight of each monitoring point;

[0008] Analyze the time domain corrosion degree variation characteristics of each monitoring point according to the corrosion analysis weight and the video frame image set, and determine the salt spray corrosion resistance index of the pole of the new pole-mounted recloser;

[0009] According to the salt spray corrosion resistance index of the new pole-mounted recloser pole, the quality grade of the new pole-mounted recloser pole is determined.

[0010] In the above scheme, the relevant data of the salt spray corrosion resistance test of the new and traditional pole-mounted recloser poles are first obtained, and then the contour difference characteristics between the new and traditional pole-mounted recloser poles and the local salt spray accumulation characteristics are analyzed based on the relevant data to determine the corrosion analysis weight of each monitoring point. Compared with the existing salt spray corrosion test that makes consistency judgments on all positions of the poles, the corrosion analysis weights determined by the present invention can focus on analyzing the transparent observation window of the new pole-mounted recloser pole and the corrosion conditions where salt spray accumulation occurs, effectively enhancing the accuracy of the test results and the significance of the corrosion results; then, the time domain corrosion degree change characteristics of the analysis monitoring points are added to the corrosion analysis process. Compared with the existing test judgment directly based on the corrosion results, the present invention can make a more detailed judgment on the corrosion test process and improve the numerical accuracy of the salt spray corrosion resistance index; finally, the quality grade of the new pole-mounted recloser pole is determined by using the salt spray corrosion resistance index, which can further improve the detection accuracy of the salt spray corrosion resistance performance of the new pole-mounted recloser pole.

[0011] Furthermore, the analysis of the contour difference characteristics and local salt mist accumulation characteristics of the recloser pole according to the monitoring point coordinate information set to determine the corrosion analysis weight of each monitoring point includes:

[0012] For a new pole-mounted recloser pole, any monitoring point of the new pole-mounted recloser pole is taken as the first target monitoring point, and the coordinate value of the first target monitoring point on each coordinate axis in the monitoring point coordinate information set of the new pole-mounted recloser pole is determined, as well as the coordinate value of the corresponding monitoring point on the corresponding coordinate axis in the monitoring point coordinate information set of the traditional pole-mounted recloser pole;

[0013] Determine a contour difference index of the first target monitoring point according to a difference between a coordinate value of the first target monitoring point on each coordinate axis and a coordinate value of the corresponding monitoring point on the corresponding coordinate axis;

[0014] Determine a first preset number of monitoring points closest to the first target monitoring point among all monitoring points corresponding to the pole of the new pole-mounted recloser as first reference monitoring points, and determine the salt spray accumulation index of the first target monitoring point according to the coordinate values ​​of the first target monitoring point on each coordinate axis and the coordinate values ​​of each first reference monitoring point on each coordinate axis;

[0015] The corrosion analysis weight of the first target monitoring point is determined according to the contour difference index and salt spray accumulation index of the first target monitoring point.

[0016] In the above scheme, the corrosion analysis weights of the monitoring points of the new pole-mounted recloser pole are determined by two aspects, namely, the contour difference index and the salt spray accumulation index. That is, when determining the corrosion analysis weights, it is necessary not only to consider the changes in the shape contour of the new pole-mounted recloser pole compared to the traditional pole-mounted recloser pole, but also to consider the corrosion situation when salt spray accumulation occurs. Compared with the existing anti-salt spray corrosion analysis process, the present invention enables the corrosion analysis weights of different monitoring points to be judged more carefully in combination with the contour characteristics of the new pole, and also improves the numerical accuracy of the corrosion analysis weights, providing reliable data support for the subsequent anti-salt spray corrosion index analysis.

[0017] Furthermore, after determining the corrosion analysis weight of each monitoring point of the pole of the new pole-mounted recloser, it also includes:

[0018] For a conventional pole-mounted recloser pole, any monitoring point of the conventional pole-mounted recloser pole is used as a second target monitoring point, and a first preset number of monitoring points closest to the second target monitoring point among all monitoring points corresponding to the conventional pole-mounted recloser pole are determined as second reference monitoring points;

[0019] The corrosion analysis weight of the second target monitoring point is determined according to the coordinate value of the second target monitoring point on each coordinate axis and the coordinate value of each second reference monitoring point on each coordinate axis.

[0020] In the above scheme, there are differences in the corrosion analysis weight calculation process of the traditional pole-mounted recloser pole and the new pole-mounted recloser pole. The traditional pole-mounted recloser pole does not require additional quantitative contour difference indicators, so the two need to be calculated separately.

[0021] Further, the determining of the salt spray accumulation index of the first target monitoring point according to the coordinate value of the first target monitoring point on each coordinate axis and the coordinate value of each first reference monitoring point on each coordinate axis includes:

[0022] The coordinate axis representing the height among all the coordinate axes is taken as the target coordinate axis, and the maximum coordinate value and the minimum coordinate value of all the reference monitoring points on the target coordinate axis are determined;

[0023] The local height situation is analyzed in combination with the coordinate value of the first target monitoring point on the target coordinate axis and the maximum coordinate value and the minimum coordinate value to determine the salt spray accumulation index of the first target monitoring point.

[0024] In the above scheme, since salt spray accumulation generally occurs in the height direction, the coordinate axis representing the height is used as the target coordinate axis, and the local height minimum in the local area is constructed in combination with the monitoring points around it to quantify the salt spray accumulation index. The salt spray accumulation index is one of the key indicators for calculating the weight of corrosion analysis.

[0025] Furthermore, the corrosion analysis weight of the first target monitoring point is determined according to the profile difference index and the salt spray accumulation index of the first target monitoring point, including:

[0026] The product of the profile difference index and the salt spray accumulation index of the first target monitoring point is calculated as the first product; the first product is normalized to obtain the corrosion analysis weight of the first target monitoring point.

[0027] In the above scheme, in order to improve the reliability of the corrosion analysis weight, the product of the profile difference index and the salt spray accumulation index is calculated. Further, in order to ensure that the numerical range of the corrosion analysis weight is between 0 and 1, the first product needs to be normalized.

[0028] Furthermore, the time domain corrosion degree variation characteristics of each monitoring point are analyzed according to the corrosion analysis weight and the video frame image set to determine the salt spray corrosion resistance index of the pole of the new pole-mounted recloser, including:

[0029] For a new pole-mounted recloser pole or a traditional pole-mounted recloser pole, selecting a second preset number of static frame images from the video frame image set in sequence;

[0030] Determine the salt spray tolerance index of each monitoring point according to the difference between the grayscale value of each monitoring point in each static frame image and the grayscale value in the initial static frame image; wherein the initial static frame image refers to the surface image of the new pole-mounted recloser pole or the traditional pole-mounted recloser pole before the test;

[0031] According to the salt spray tolerance index of each monitoring point corresponding to the new pole-mounted recloser pole and the traditional pole-mounted recloser pole and the corrosion analysis weight, the salt spray corrosion resistance index of the new pole-mounted recloser pole is determined.

[0032] In the above scheme, the second preset number of static frame images is selected to select representative images to avoid excessive analysis data when analyzing each frame image in the set, which affects the test analysis efficiency; the numerical reliability of the salt spray corrosion resistance index determined by combining the salt spray tolerance index and the corrosion analysis weight is stronger.

[0033] Further, the determining of the salt spray tolerance index of each monitoring point according to the difference between the grayscale value of each monitoring point in each static frame image and the grayscale value in the initial static frame image includes:

[0034] For any monitoring point, the absolute value of the difference between the grayscale value of the monitoring point in each static frame image and the grayscale value in the initial static frame image is calculated as the corrosion degree of the monitoring point in each static frame image;

[0035] A coordinate system is constructed according to the acquisition time of each static frame image and the corrosion degree in each static frame image to obtain a dynamic salt spray corrosion curve;

[0036] The change in corrosion degree is analyzed according to the position information of each data point in the dynamic salt spray corrosion curve, and the salt spray tolerance index of the monitoring point is determined.

[0037] In the above scheme, the corrosion degree of the monitoring point in each static frame image is first determined by the grayscale conditions of the same monitoring point in the static frame images at different times; then the dynamic salt spray corrosion curve is fitted in combination with the corrosion degree and the image acquisition time to determine the salt spray tolerance index of the monitoring point; the dynamic salt spray corrosion curve can be used to analyze the corrosion degree change trend and numerical value distribution, so as to obtain a salt spray tolerance index with higher numerical accuracy, which is helpful to further improve the reliability of the test results of the new pole-mounted recloser pole anti-salt spray corrosion.

[0038] Furthermore, analyzing the change in corrosion degree according to the position information of each data point in the dynamic salt spray corrosion curve to determine the salt spray tolerance index of the monitoring point includes:

[0039] Performing straight line fitting on the dynamic salt spray corrosion curve to obtain the slope of the fitting straight line;

[0040] Calculating the product of the slope of the fitting straight line and the average value of the corrosion degree of all data points on the dynamic salt spray corrosion curve as the second product;

[0041] The second product is subjected to negative correlation normalization processing to obtain the salt spray tolerance index of the monitoring point.

[0042] In the above scheme, the slope of the fitting straight line of the dynamic salt spray corrosion curve can be used to analyze the changing trend of the corrosion degree, and then the salt spray tolerance index can be determined by combining the average value of all corrosion degrees, which effectively improves the numerical accuracy of the salt spray tolerance index.

[0043] Furthermore, the salt spray corrosion resistance index of the new pole-mounted recloser pole is determined according to the salt spray tolerance index of each monitoring point corresponding to the new pole-mounted recloser pole and the traditional pole-mounted recloser pole and the corrosion analysis weight, including:

[0044] For a new pole-mounted recloser pole or a traditional pole-mounted recloser pole, the product of the salt spray tolerance index of each monitoring point and the corrosion analysis weight is calculated as the third product; the third product of each monitoring point corresponding to the same pole-mounted recloser pole is normalized to obtain the salt spray corrosion resistance parameter of the pole-mounted recloser pole;

[0045] The ratio of the salt spray corrosion resistance parameter of the new pole-mounted recloser pole to the salt spray corrosion resistance parameter of the traditional pole-mounted recloser pole is calculated, and the ratio is used as the salt spray corrosion resistance index of the new pole-mounted recloser pole.

[0046] In the above scheme, the difference in salt spray corrosion resistance parameters of the new pole-mounted recloser pole and the traditional pole-mounted recloser pole is compared to analyze the difference between the salt spray corrosion resistance of the new pole-mounted recloser pole and the traditional pole-mounted recloser pole, and this is used as the final salt spray corrosion resistance index to further improve the judgment accuracy of the salt spray corrosion resistance of the new pole-mounted recloser pole.

[0047] Furthermore, the quality grade of the new pole-mounted recloser pole is determined according to the salt spray corrosion resistance index of the new pole-mounted recloser pole, including:

[0048] If the salt spray corrosion resistance index of the new pole-mounted recloser pole is less than the first index threshold, it is determined that the new pole-mounted recloser pole belongs to the first quality grade;

[0049] If the salt spray corrosion resistance index of the new pole-mounted recloser pole is greater than or equal to the first index threshold and less than the second index threshold, the new pole-mounted recloser pole is determined to belong to the second quality grade;

[0050] If the salt spray corrosion resistance index of the new pole-mounted recloser pole is greater than or equal to the second index threshold, the new pole-mounted recloser pole is determined to belong to the third quality level;

[0051] The first indicator threshold is smaller than the second indicator threshold, the first quality level is smaller than the second quality level, and the second quality level is smaller than the third quality level.

[0052] In the above scheme, the greater the salt spray corrosion resistance index, the higher the quality grade of the corresponding new pole-mounted recloser pole. Combined with the specific salt spray corrosion resistance index, the new pole-mounted recloser pole can be divided into different quality grades, which helps implementers to perform adaptive analysis and processing according to different quality grades.

[0053] Furthermore, the acquisition of the monitoring point coordinate information set of the new pole-mounted recloser pole and the traditional pole-mounted recloser pole includes:

[0054] A laser scanner is used to collect point cloud information of each monitoring point of the new pole-mounted recloser pole and the traditional pole-mounted recloser pole; a three-dimensional model of the new pole-mounted recloser pole and a three-dimensional model of the traditional pole-mounted recloser pole are respectively constructed based on the point cloud information, thereby obtaining two sets of coordinate information of the monitoring points.

[0055] In the above scheme, by obtaining a set of monitoring point coordinate information, it is helpful to analyze the contour differences between the new pole-mounted recloser pole and the traditional pole-mounted recloser pole, so as to provide data support for the subsequent corrosion analysis weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0057] Figure 1 This is a flow chart of a novel salt spray corrosion resistance test method for a 10kV pole-mounted recloser pole according to an embodiment of the present invention;

[0058] Figure 2 A flowchart of the implementation steps of determining the corrosion analysis weight of each monitoring point of the pole of the novel pole-mounted recloser in an embodiment of the present invention;

[0059] Figure 3 Flow chart of step S3 in the embodiment of the present invention. DETAILED DESCRIPTION

[0060] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the technical solutions proposed by the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0061] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0062] The main purpose of the present invention is to evaluate the salt spray corrosion resistance of a new 10kV pole-mounted recloser pole. The new pole-mounted recloser pole is equipped with a transparent observation window structure for the vacuum interrupter inside the pole, which improves the visualization effect of the pole status. However, the transparent observation window is made of a new composite material. Compared with the traditional epoxy resin with strong corrosion resistance, its salt spray corrosion resistance will be reduced. If the salt spray corrosion area is severely corroded, local discharge may occur in the area, thereby reducing the processing efficiency of the pole-mounted recloser for short-circuit current and overload current. Therefore, it is necessary to test the salt spray corrosion resistance of the new pole-mounted recloser pole.

[0063] The existing new pole-mounted recloser pole is subjected to a charged neutral salt spray corrosion test, in which a corrosive chloride solution is applied to the pole, and then the degree of corrosion of the pole is analyzed after the test to obtain the salt spray corrosion resistance evaluation result. The existing salt spray corrosion resistance test method only analyzes the corrosion situation at the end of the test, and does not make a detailed analysis of the time domain corrosion degree of the pole during the test. At the same time, it also does not consider the changes in the contour shape characteristics of the pole, such as the area corresponding to the transparent observation window and the area corresponding to the salt spray accumulation caused by the contour characteristics, which need to be analyzed in detail. The existing salt spray corrosion resistance test method conducts consistency evaluation on each monitoring point of the new pole-mounted recloser pole, which reduces the accuracy of judging the salt spray corrosion resistance performance of the new 10kV pole-mounted recloser pole.

[0064] Therefore, in order to overcome the shortcomings of the above-mentioned existing test methods, this embodiment provides a new salt spray corrosion resistance test method for 10kV pole-mounted recloser poles, such as Figure 1 As shown, the following steps are included:

[0065] S1, first obtain a set of monitoring point coordinate information of the new pole-mounted recloser pole and the traditional pole-mounted recloser pole, and then obtain a set of video frame images of the new pole-mounted recloser pole and the traditional pole-mounted recloser pole during the test process.

[0066] The above step S1 can be implemented through steps S11 to S12 (not shown in the figure):

[0067] S11, obtaining a set of monitoring point coordinate information of the new pole-mounted recloser pole and the traditional pole-mounted recloser pole.

[0068] Here, the new pole-mounted recloser pole specifically refers to the new 10kV pole-mounted recloser pole, and the traditional pole-mounted recloser pole refers to the pole that is sealed with epoxy resin. By obtaining the point cloud data of the new pole-mounted recloser pole and the traditional pole-mounted recloser pole, it is conducive to the subsequent analysis of the difference in contour changes. Among them, the new pole-mounted recloser pole can be referred to as the new pole, and the traditional pole-mounted recloser pole can be referred to as the traditional pole.

[0069] Specifically, a laser scanner is used to collect point cloud information of each monitoring point of the new pole-mounted recloser pole and the traditional pole-mounted recloser pole; a three-dimensional model of the new pole-mounted recloser pole and a three-dimensional model of the traditional pole-mounted recloser pole are respectively constructed according to the point cloud information, and then two sets of monitoring point coordinate information are obtained. Among them, the monitoring point coordinate information set includes the three-dimensional coordinate information of several monitoring points, that is, the coordinate value size on the length coordinate axis, the width coordinate axis and the height coordinate axis, and each monitoring point has its corresponding coordinate value on its corresponding coordinate axis.

[0070] S12, obtaining a set of video frame images of the new pole-mounted recloser pole and the traditional pole-mounted recloser pole during the test process.

[0071] Here, the video frame image set is obtained to facilitate the subsequent analysis of the time domain corrosion degree change characteristics of each monitoring point on the pole of the pole-mounted recloser. It is worth noting that the video frame image set includes the initial static frame image before the test, that is, the initial static frame image refers to the surface image of the new pole-mounted recloser pole or the traditional pole-mounted recloser pole before the test.

[0072] Specifically, after obtaining the coordinate information of the monitoring point, the new pole-mounted recloser and the traditional pole-mounted recloser are placed in a salt spray test machine, and subjected to chloride salt solution corrosion treatment; during the treatment process, the high-definition camera in the salt spray test machine is used to shoot video data of the poles of the new pole-mounted recloser and the traditional pole-mounted recloser during the test, and the video data is converted into a video frame image, which is called a static frame image, and all the static frame images are obtained to form a video frame image set. Among them, the implementation process of converting the video into a video frame image is a prior art, which is not within the protection scope of the present invention and will not be elaborated in detail here; the video frame image set includes static frame images at several moments.

[0073] So far, this embodiment has obtained basic data for subsequent test analysis, namely, a set of monitoring point coordinate information and a set of video frame images of the new pole and the traditional pole.

[0074] S2, analyze the contour difference characteristics of the recloser pole and the local salt spray accumulation characteristics according to the monitoring point coordinate information set, and determine the corrosion analysis weight of each monitoring point.

[0075] Here, due to the newly added transparent observation window, the new pole may cause some of its monitoring points to have significant differences in morphology compared with the traditional pole. Therefore, a higher corrosion analysis weight should be set for the monitoring points with significant differences. The corrosion analysis weight refers to the degree of attention when conducting corrosion analysis on the monitoring points. At the same time, considering that some monitoring points on the pole-mounted recloser pole may be in the area of ​​accumulated salt fog, which will lead to aggravated salt fog corrosion, the monitoring points in the area of ​​accumulated salt fog should be analyzed in detail.

[0076] For new pole-mounted recloser poles, such as Figure 2 As shown in FIG. 1 , the implementation steps for determining the corrosion analysis weight of each monitoring point of the new pole-mounted recloser pole include:

[0077] S21, taking any monitoring point of the pole of the new pole-mounted recloser as the first target monitoring point, determining the coordinate value of the first target monitoring point on each coordinate axis in the monitoring point coordinate information set of the pole of the new pole-mounted recloser, and the coordinate value of the corresponding monitoring point on the corresponding coordinate axis in the monitoring point coordinate information set of the pole of the traditional pole-mounted recloser.

[0078] In this embodiment, in order to facilitate the understanding of the scheme, any monitoring point of the pole of the new pole-mounted recloser is first analyzed, and it is called the first target monitoring point, so as to distinguish any subsequent monitoring point of the pole of the traditional pole-mounted recloser; the coordinate value of the first target monitoring point on each coordinate axis is determined in the monitoring point coordinate information set of the pole of the new pole-mounted recloser, that is, , and then determine the coordinate value of the monitoring point on each coordinate axis that is most similar to the first target monitoring point in the monitoring point coordinate information set of the traditional pole-mounted recloser pole, that is, .

[0079] It should be noted that due to the change in shape between the new pole and the traditional pole, the monitoring point corresponding to the new pole may not have a completely corresponding monitoring point on the traditional pole, but the two monitoring points with the most similar geometric relative coordinates on the traditional pole are selected for subsequent coordinate value difference analysis.

[0080] S22, determining a contour difference index of the first target monitoring point according to a difference between a coordinate value of the first target monitoring point on each coordinate axis and a coordinate value of a corresponding monitoring point on the corresponding coordinate axis.

[0081] In this embodiment, the greater the difference in the three-dimensional coordinate information of a pair of monitoring points between the new pole and the traditional pole, the greater the difference in the contours of the pair of monitoring points, and the more emphasis the monitoring point of the new pole in the pair of monitoring points needs to be placed on salt spray corrosion analysis, which further indicates that the corrosion analysis weight of the monitoring point of the new pole should be greater.

[0082] As an example, the calculation formula of the profile difference index of the i-th monitoring point of the pole of the new pole-mounted recloser can be:

[0083] ; In the formula, It represents the contour difference index of the ith monitoring point of the pole of the new pole-mounted recloser. The ith monitoring point of the pole of the new pole-mounted recloser can also be represented as the first target monitoring point. i represents the sequence number of the monitoring point, N represents the number of coordinate axes in the three-dimensional model, N is equal to 3, and n represents the sequence number of the coordinate axis. It represents the coordinate value of the ith monitoring point of the pole of the new pole-mounted recloser on the nth coordinate axis, It represents the coordinate value of the ith monitoring point of the pole of the traditional pole-mounted recloser on the nth coordinate axis. Represents the absolute value function.

[0084] In the calculation formula of the contour difference index, It represents the difference in coordinate information of the ith monitoring point in the three-dimensional model of the new pole-mounted recloser pole and the traditional pole-mounted recloser pole. The greater the difference in coordinate information, the greater the possibility that the ith monitoring point belongs to the area corresponding to the newly established transparent observation window of the new pole, and the higher the attention paid to the salt spray corrosion resistance of the ith monitoring point. Therefore, the contour difference index is positively correlated with the subsequent corrosion analysis weight.

[0085] S23, determining a first preset number of monitoring points closest to the first target monitoring point among all monitoring points corresponding to the pole of the new pole-mounted recloser as first reference monitoring points, and determining the salt spray accumulation index of the first target monitoring point according to the coordinate values ​​of the first target monitoring point on each coordinate axis and the coordinate values ​​of each first reference monitoring point on each coordinate axis.

[0086] In this embodiment, the salt spray accumulation index can characterize the possibility that the monitoring point is a local height minimum within its neighborhood. The more likely the monitoring point is to be a local height minimum, the greater the possibility that salt spray will accumulate at the monitoring point during the test, which will lead to the aggravation of salt spray corrosion in the area centered on the monitoring point. In order to ensure the significance of the salt spray corrosion effect, the monitoring points with local minimum values ​​should be analyzed in detail.

[0087] The above step S23 can be implemented through steps S231 to S232 (not shown in the figure):

[0088] S231, determine the first preset number of monitoring points closest to the first target monitoring point among all the monitoring points corresponding to the pole of the new pole-mounted recloser as the first reference monitoring points; take the coordinate axis representing the height among all the coordinate axes as the target coordinate axis, and determine the maximum coordinate value and the minimum coordinate value of all the reference monitoring points on the target coordinate axis.

[0089] In this embodiment, when determining the first reference monitoring point, the Euclidean distances between the first target monitoring point and multiple monitoring points around it are calculated in the point cloud three-dimensional model, and the Euclidean distances are sorted in ascending order. The monitoring points corresponding to the first preset number of Euclidean distances in the sorted Euclidean distances are used as the first reference monitoring points, which are used to distinguish the second reference monitoring points. Since salt fog accumulation is more likely to occur in the height direction, the coordinate axis representing the height is used as the target coordinate axis, and the salt fog accumulation index is subsequently quantified based on the coordinate information in the height direction.

[0090] Specifically, first read the Z-axis coordinate value in the point cloud three-dimensional model corresponding to the ith monitoring point of the pole of the new pole-mounted recloser, and then read the maximum and minimum values ​​of the Z-axis coordinate values ​​in the point cloud three-dimensional model corresponding to the 10 monitoring points closest to the ith monitoring point in the Euclidean distance. Among them, the point cloud three-dimensional model refers to a three-dimensional model constructed based on point cloud data, the first preset number can be set to 10, and the implementer can set the first preset number according to the actual situation. The Z-axis coordinate value specifically represents the height size, and the maximum and minimum values ​​specifically refer to the maximum and minimum values ​​selected from all the height coordinate values ​​of all the first reference monitoring points.

[0091] S232, analyzing the local height situation in combination with the coordinate value of the first target monitoring point on the target coordinate axis as well as the maximum coordinate value and the minimum coordinate value, to determine the salt fog accumulation index of the first target monitoring point.

[0092] In this embodiment, if the Z-axis coordinate value of the monitoring point of the new pole is smaller than that of the first reference monitoring point, it means that the monitoring point is more likely to be located at the local height minimum, and the monitoring point needs to be more focused on setting a higher corrosion analysis weight. Therefore, it is necessary to quantify the salt spray accumulation index of the first target monitoring point based on the coordinate value of the first target monitoring point on the target coordinate axis and the maximum coordinate value and the minimum coordinate value corresponding to all the first reference monitoring points.

[0093] As an example, the calculation formula for the salt fog accumulation index of the ith monitoring point of the pole of the new pole-mounted recloser can be:

[0094] ; In the formula, represents the salt spray accumulation index of the ith monitoring point of the pole of the new pole-mounted recloser, Indicates the maximum coordinate value of all first reference monitoring points corresponding to the i-th monitoring point on the target coordinate axis, It represents the minimum coordinate value of all the first reference monitoring points corresponding to the i-th monitoring point on the target coordinate axis. Represents the coordinate value of the i-th monitoring point on the target coordinate axis.

[0095] In the calculation formula of salt spray accumulation index, The bigger, the The smaller it is, the greater the possibility that the i-th monitoring point is a local minimum, the more obvious the salt spray accumulation characteristics it represents, and the larger the corresponding salt spray accumulation index should be; The height distribution of the local area formed by the i-th monitoring point and its adjacent monitoring points can be characterized. Since salt spray may accumulate in the area of ​​local height minimum during the pole corrosion test of the pole-mounted recloser, thereby aggravating the salt spray corrosion in this area, the monitoring points with local height minimum should be analyzed in detail.

[0096] S24, determining the corrosion analysis weight of the first target monitoring point according to the profile difference index and the salt spray accumulation index of the first target monitoring point.

[0097] In this embodiment, the profile difference index is positively correlated with the corrosion analysis weight, and the salt spray accumulation index is also positively correlated with the corrosion analysis weight. The two indicators of the first target monitoring point are combined by multiplication or addition, and the combined value is used as the corrosion analysis weight of the first target monitoring point.

[0098] Specifically, the product of the profile difference index and the salt spray accumulation index of the first target monitoring point is calculated as the first product; the first product is normalized using a linear normalization function to obtain the corrosion analysis weight of the first target monitoring point.

[0099] For a conventional pole mounted recloser pole, the implementation steps for determining the corrosion analysis weight of each monitoring point of the conventional pole mounted recloser pole include:

[0100] Take any monitoring point of the traditional pole-mounted recloser pole as the second target monitoring point, and determine the first preset number of monitoring points closest to the second target monitoring point among all the monitoring points corresponding to the traditional pole-mounted recloser pole as the second reference monitoring points; determine the corrosion analysis weight of the second target monitoring point according to the coordinate value of the second target monitoring point on each coordinate axis and the coordinate value of each second reference monitoring point on each coordinate axis.

[0101] It should be noted that when calculating the corrosion analysis weight of the second target monitoring point of the traditional pole-mounted recloser pole, the calculation process of the salt spray accumulation index of the first target monitoring point can be referred to, and then the salt spray accumulation index of the second target monitoring point obtained by calculation is normalized to obtain the corrosion analysis weight of the second target monitoring point. Among them, the same calculation process is not repeated here, and the implementation means of normalization processing include but are not limited to linear normalization, mean normalization, nonlinear normalization, and decimal calibration normalization, etc. The implementation process of normalization processing is an existing technology and will not be elaborated in detail here.

[0102] So far, this embodiment obtains the corrosion analysis weight of each monitoring point of the new pole-mounted recloser pole and the traditional pole-mounted recloser pole.

[0103] S3, analyze the time domain corrosion degree variation characteristics of each monitoring point according to the corrosion analysis weight and the video frame image set, and determine the salt spray corrosion resistance index of the new pole-mounted recloser pole.

[0104] Here, the salt spray corrosion resistance index refers to the salt spray corrosion resistance of the pole of the new pole-mounted recloser, that is, the test result. The larger the salt spray corrosion resistance index, the stronger the salt spray corrosion resistance of the pole of the new pole-mounted recloser. When analyzing the salt spray corrosion resistance, it is necessary not only to quantify the corrosion analysis weight of each monitoring point, but also to analyze the time domain corrosion degree change characteristics of the monitoring point.

[0105] Regarding the characteristics of the change in the degree of corrosion in the time domain, for a single monitoring point of the pole at a certain moment, a static frame image at the corresponding moment is extracted from the collected video frame image set. If the grayscale difference between the static frame image at the corresponding moment and that before the salt spray test is greater, the degree of corrosion of the monitoring point is greater. In addition, during the test, the corrosion degree of the monitoring point in the static frame images at different moments shows an overall high amplitude and a rapid rising trend, indicating that the monitoring point of the pole has poor resistance to salt spray corrosion.

[0106] The above step S3 can be Figure 3 The steps shown achieve:

[0107] S31, for a new pole-mounted recloser pole or a traditional pole-mounted recloser pole, sequentially select a second preset number of static frame images from a video frame image set.

[0108] In this embodiment, multiple static frame images for observation are selected from the video frame image set, the test process corresponding to the video frame image set is evenly divided into 1000 segments according to time intervals, and the static frame images at each time interval are selected for observation, and then the selected static frame images for observation are arranged in chronological order from far to near to obtain a static frame image set.

[0109] It is worth noting that the static frame image to be subsequently analyzed is an image selected from the second preset number and is an image after image processing. Image processing specifically refers to grayscale processing of the static frame image so as to obtain the grayscale value of the monitoring point in the image later. The grayscale processing implementation method includes but is not limited to the weighted average method, the average method, the maximum method and the minimum method. The grayscale processing implementation process is a prior art and will not be elaborated in detail here.

[0110] S32, determining the salt spray tolerance index of each monitoring point according to the difference between the grayscale value of each monitoring point in each static frame image and the grayscale value in the initial static frame image.

[0111] In this embodiment, the salt spray tolerance index refers to the ability of the monitoring point to withstand salt spray corrosion. The larger the salt spray tolerance index, the stronger the ability of the monitoring point to withstand salt spray corrosion. Because the grayscale difference can characterize the degree of corrosion change, the salt spray tolerance index of the monitoring point can be quantified by the grayscale difference of the monitoring point in each static frame image and in the initial static frame image. Among them, the initial static frame image refers to the surface image of the new pole-mounted recloser pole or the traditional pole-mounted recloser pole before the test.

[0112] The above step S32 can be implemented through steps S321 to S323 (not shown in the figure):

[0113] S321, for any monitoring point, calculating the absolute value of the difference between the grayscale value of the monitoring point in each static frame image and the grayscale value in the initial static frame image as the corrosion degree of the monitoring point in each static frame image.

[0114] In this embodiment, before determining the degree of corrosion, it is necessary to correspond the monitoring points of the three-dimensional model to the pixel points of the two-dimensional static frame image, which is achieved through camera calibration and geometric transformation, specifically: during camera calibration, the intrinsic and extrinsic parameters of the camera are obtained, which can convert the three-dimensional coordinate system to the two-dimensional image coordinate system; then, using the parameters and the point coordinates in the point cloud model, the three-dimensional points are mapped to the image plane through projection transformation, and the pixel position of each monitoring point in the static frame image is determined, and then the grayscale value of the monitoring point in the static frame image is determined. The process of determining the grayscale value of the monitoring point in the static frame image is a prior art and is not within the scope of protection of the present invention, and will not be elaborated in more detail here.

[0115] As an example, the calculation formula for the corrosion degree of the i-th monitoring point in the j-th static frame image can be:

[0116] ; In the formula, Indicates the degree of corrosion of the i-th monitoring point in the j-th static frame image, represents the gray value of the i-th monitoring point in the j-th static frame image, represents the gray value of the i-th monitoring point in the initial static frame image, Represents the absolute value function.

[0117] S322, constructing a coordinate system according to the acquisition time of each static frame image and the corrosion degree in each static frame image to obtain a dynamic salt spray corrosion curve.

[0118] Specifically, a coordinate system is constructed with the acquisition time of each static frame image as the horizontal coordinate and the corrosion degree of the monitoring point in each static frame image as the vertical coordinate, and a dynamic salt spray corrosion curve of the monitoring point is drawn on the coordinate system. Among them, the implementation process of drawing the dynamic salt spray corrosion curve is a prior art, which is not within the protection scope of the present invention and will not be elaborated in detail here.

[0119] In this embodiment, the corrosion degree variation trend of the monitoring point at different times can be clearly determined by drawing a dynamic salt spray corrosion curve, and then the salt spray tolerance index of the monitoring point can be determined by analyzing the corrosion degree variation trend.

[0120] S323, analyzing the change in corrosion degree according to the position information of each data point in the dynamic salt spray corrosion curve, and determining the salt spray tolerance index of the monitoring point.

[0121] Specifically, the least square method is used to perform linear fitting on the dynamic salt spray corrosion curve to obtain the slope of the fitted straight line; the product of the slope of the fitted straight line and the average value of the corrosion degree of all data points on the dynamic salt spray corrosion curve is calculated as the second product; the second product is normalized for negative correlation to obtain the salt spray tolerance index of the monitoring point. Among them, the implementation process of the least square method is an existing technology and will not be repeated.

[0122] As an example, the calculation formula for the salt spray tolerance index of the zth monitoring point can be:

[0123] ; In the formula, represents the salt spray tolerance index of the zth monitoring point, exp represents the exponential function with the natural constant as the base, represents the slope of the fitting line corresponding to the zth monitoring point, It represents the average corrosion degree of all data points on the dynamic salt spray corrosion curve corresponding to the zth monitoring point. Represents the second product.

[0124] In the calculation formula of salt spray tolerance index, exp (-) is used to realize the normalization processing of negative correlation of data. The larger it is, the more likely it is that the corrosion degree of the z-th monitoring point will show an upward trend, and the worse the salt spray tolerance of the z-th monitoring point is. The larger the average corrosion degree of all data points on the dynamic salt spray corrosion curve corresponding to the z-th monitoring point is, the worse the salt spray tolerance of the z-th monitoring point is.

[0125] It should be noted that the salt spray tolerance level needs to be calculated for each monitoring point corresponding to the new pole-mounted recloser pole and the traditional pole-mounted recloser pole, so the salt spray tolerance level of all monitoring points can be obtained by referring to the calculation process of the salt spray tolerance level of the zth monitoring point mentioned above.

[0126] S33, determining the salt spray corrosion resistance index of the new pole-mounted recloser pole according to the salt spray tolerance index and corrosion analysis weight of each monitoring point corresponding to the new pole-mounted recloser pole and the traditional pole-mounted recloser pole.

[0127] Here, the salt spray corrosion resistance index represents the salt spray corrosion resistance test result of the new pole-mounted recloser pole. The larger the salt spray corrosion resistance index is, the stronger the salt spray corrosion resistance performance of the new pole-mounted recloser pole is. Compared with the existing salt spray corrosion resistance test method, this embodiment combines the time domain corrosion degree change characteristics while adding the corrosion analysis weight obtained by the profile difference and salt spray accumulation, which can effectively enhance the numerical accuracy of the salt spray corrosion resistance index, thereby improving the reliability of the salt spray corrosion resistance test result of the new pole-mounted recloser pole, which is conducive to ensuring the quality of the final product.

[0128] The above step S33 can be implemented through steps S331 to S332 (not shown in the figure):

[0129] S331, calculate the product of the salt spray tolerance index and the corrosion analysis weight of each monitoring point as the third product; normalize the third product of each monitoring point corresponding to the same pole-mounted recloser pole to obtain the salt spray corrosion resistance parameter of the pole-mounted recloser pole.

[0130] In this embodiment, when quantifying the salt spray corrosion resistance parameters, it is necessary not only to calculate the salt spray corrosion resistance parameters of the new pole-mounted recloser pole, but also to calculate the salt spray corrosion resistance parameters of the traditional pole-mounted recloser pole. The salt spray corrosion resistance parameters of the traditional pole-mounted recloser pole are calculated to facilitate subsequent comparison with the new pole-mounted recloser pole to determine the salt spray corrosion resistance index of the new pole-mounted recloser pole.

[0131] Taking any pole of the recloser on the pole as an example, the salt spray corrosion resistance parameters are determined, and the calculation formula can be:

[0132] ; In the formula, F represents the salt spray corrosion resistance parameter of the pole of the pole-mounted recloser, R represents the number of monitoring points of the pole-mounted recloser, represents the corrosion analysis weight of the ith monitoring point of the pole of the pole-mounted recloser, represents the salt spray tolerance index of the ith monitoring point of the pole of the pole-mounted recloser, Represents the third product.

[0133] S332, calculating the ratio of the salt spray corrosion resistance parameter of the new pole-mounted recloser pole to the salt spray corrosion resistance parameter of the traditional pole-mounted recloser pole, and using the ratio as the salt spray corrosion resistance index of the new pole-mounted recloser pole.

[0134] In this embodiment, the salt spray corrosion resistance index is quantified by the difference characteristics of the salt spray corrosion resistance parameters of the new pole-mounted recloser pole and the traditional pole-mounted recloser pole. If the difference in the salt spray corrosion resistance parameters of the two poles is large, that is, the smaller the ratio, it means that the salt spray corrosion resistance of the new pole is poorer than that of the traditional pole, and the salt spray corrosion resistance index of the new pole-mounted recloser pole is smaller.

[0135] As an example, the calculation formula for the salt spray corrosion resistance index of the new pole-mounted recloser pole can be:

[0136] ; In the formula, IF represents the salt spray corrosion resistance index of the pole of the new pole-mounted recloser. Indicates the salt spray corrosion resistance parameters of the traditional pole-mounted recloser pole. .

[0137] So far, this embodiment has obtained the salt spray corrosion resistance index of the pole of the new pole-mounted recloser.

[0138] S4. Determine the quality grade of the new pole-mounted recloser pole according to the salt spray corrosion resistance index of the new pole-mounted recloser pole.

[0139] In this embodiment, the greater the salt spray corrosion resistance index, the higher the quality grade of the pole of the new pole-mounted recloser. Therefore, based on the correlation between the salt spray corrosion resistance index and the quality grade, the quality grade of the pole of the new pole-mounted recloser is determined. There are three different situations as follows:

[0140] Case 1: if the salt spray corrosion resistance index of the new pole-mounted recloser pole is less than the first index threshold, the new pole-mounted recloser pole is judged to belong to the first quality grade. When the new pole-mounted recloser pole belongs to the first quality grade, it means that the new pole has poor resistance to salt spray corrosion and needs to be reshaped.

[0141] Case 2: If the salt spray corrosion resistance index of the new pole-mounted recloser pole is greater than or equal to the first index threshold and less than the second index threshold, the new pole-mounted recloser pole is judged to belong to the second quality grade. When the new pole-mounted recloser pole belongs to the second quality grade, a new sample of the same type of the new pole-mounted recloser pole should be randomly sampled and measured again.

[0142] Case three, if the salt spray corrosion resistance index of the new pole-mounted recloser pole is greater than or equal to the second index threshold, the new pole-mounted recloser pole is judged to belong to the third quality grade. When the new pole-mounted recloser pole belongs to the third quality grade, it means that the salt spray corrosion resistance performance of the new pole meets the standard.

[0143] Among them, the first indicator threshold is smaller than the second indicator threshold, the first quality level is smaller than the second quality level, and the second quality level is smaller than the third quality level; the first indicator threshold takes an empirical value of 0.5, and the second indicator threshold takes an empirical value of 0.8. Implementers can set the size of the first indicator threshold and the second indicator threshold according to specific actual conditions without making specific restrictions.

[0144] As an example, the expression for determining the quality level of a new type of pole-mounted recloser pole can be:

[0145] ; In the formula, Indicates the salt spray corrosion resistance index of the new pole-mounted recloser pole. Indicates the first quality level, Indicates the second quality level, Indicates the third quality level.

[0146] So far, this embodiment has determined the quality grade of the pole of the new pole-mounted recloser through the salt spray corrosion resistance index.

[0147] The present invention first obtains relevant data of the salt spray corrosion resistance test of the new and traditional pole-mounted recloser poles, and then analyzes the contour difference characteristics between the new and traditional pole-mounted recloser poles and the local salt spray accumulation characteristics based on the relevant data to determine the corrosion analysis weight of each monitoring point. Compared with the existing salt spray corrosion test that makes consistency judgment on all positions of the pole, the corrosion analysis weight determined by the present invention can focus on analyzing the transparent observation window of the new pole-mounted recloser pole and the corrosion situation where salt spray accumulation occurs, effectively enhancing the accuracy of the test results and the significance of the corrosion results; then, in the corrosion analysis process, the time domain corrosion degree change characteristics of the analysis monitoring point are added. Compared with the existing test judgment directly based on the corrosion results, the present invention can make a more detailed judgment on the corrosion analysis results, and improve the numerical accuracy of the salt spray corrosion resistance index; finally, the quality grade of the new pole-mounted recloser pole is determined by using the salt spray corrosion resistance index, which can further improve the detection accuracy of the salt spray corrosion resistance performance of the new pole-mounted recloser pole.

[0148] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A novel salt spray corrosion test method for 10kV pole-mounted recloser poles, characterized in that: The following steps are involved: First, the monitoring point coordinate information set of the new pole-mounted recloser pole and the traditional pole-mounted recloser pole is obtained, and then the video frame image set of the new pole-mounted recloser pole and the traditional pole-mounted recloser pole during the test process is obtained; among them, the traditional pole-mounted recloser pole adopts epoxy resin with poor visibility, while the vacuum interrupter inside the new 10kV pole-mounted recloser pole is equipped with a transparent observation window to realize the visualization of the working state of the vacuum interrupter inside the pole; Analyze the contour difference characteristics and local salt fog accumulation characteristics of the recloser pole according to the set of monitoring point coordinate information, and determine the corrosion analysis weight of each monitoring point; wherein the recloser pole is a new type of pole-mounted recloser pole and a traditional pole-mounted recloser pole; Analyze the time domain corrosion degree variation characteristics of each monitoring point according to the corrosion analysis weight and the video frame image set, and determine the salt spray corrosion resistance index of the pole of the new pole-mounted recloser; Determining the quality grade of the pole of the new pole-mounted recloser according to the salt spray corrosion resistance index of the pole of the new pole-mounted recloser; The analyzing the time domain corrosion degree variation characteristics of each monitoring point according to the corrosion analysis weight and the video frame image set to determine the salt spray corrosion resistance index of the pole of the new pole-mounted recloser includes: For a new pole-mounted recloser pole or a traditional pole-mounted recloser pole, selecting a second preset number of static frame images from the video frame image set in sequence; Determine the salt spray tolerance index of each monitoring point according to the difference between the grayscale value of each monitoring point in each static frame image and the grayscale value in the initial static frame image; wherein the initial static frame image refers to the surface image of the new pole-mounted recloser pole or the traditional pole-mounted recloser pole before the test; Determine the salt spray corrosion resistance index of the new pole-mounted recloser pole according to the salt spray tolerance index of each monitoring point corresponding to the new pole-mounted recloser pole and the traditional pole-mounted recloser pole and the corrosion analysis weight; Determining the salt spray corrosion resistance index of the new pole-mounted recloser pole according to the salt spray tolerance index of each monitoring point corresponding to the new pole-mounted recloser pole and the traditional pole-mounted recloser pole and the corrosion analysis weight includes: For a new pole-mounted recloser pole or a traditional pole-mounted recloser pole, the product of the salt spray tolerance index of each monitoring point and the corrosion analysis weight is calculated as the third product; the third product of each monitoring point corresponding to the same pole-mounted recloser pole is normalized to obtain the salt spray corrosion resistance parameter of the pole-mounted recloser pole; Calculate the ratio of the salt spray corrosion resistance parameter of the new pole-mounted recloser pole to the salt spray corrosion resistance parameter of the traditional pole-mounted recloser pole, and use the ratio as the salt spray corrosion resistance index of the new pole-mounted recloser pole; Analyzing the contour difference characteristics and local salt fog accumulation characteristics of the recloser pole according to the set of monitoring point coordinate information to determine the corrosion analysis weight of each monitoring point includes: For a new pole-mounted recloser pole, any monitoring point of the new pole-mounted recloser pole is taken as the first target monitoring point, and the coordinate value of the first target monitoring point on each coordinate axis in the monitoring point coordinate information set of the new pole-mounted recloser pole is determined, as well as the coordinate value of the corresponding monitoring point on the corresponding coordinate axis in the monitoring point coordinate information set of the traditional pole-mounted recloser pole; Determine a contour difference index of the first target monitoring point according to a difference between a coordinate value of the first target monitoring point on each coordinate axis and a coordinate value of the corresponding monitoring point on the corresponding coordinate axis; Determine a first preset number of monitoring points closest to the first target monitoring point among all monitoring points corresponding to the pole of the new pole-mounted recloser as first reference monitoring points, and determine the salt spray accumulation index of the first target monitoring point according to the coordinate values ​​of the first target monitoring point on each coordinate axis and the coordinate values ​​of each first reference monitoring point on each coordinate axis; Determine the corrosion analysis weight of the first target monitoring point according to the profile difference index and the salt spray accumulation index of the first target monitoring point; After determining the corrosion analysis weight of each monitoring point of the new pole-mounted recloser pole, it also includes: For a conventional pole-mounted recloser pole, any monitoring point of the conventional pole-mounted recloser pole is used as a second target monitoring point, and a first preset number of monitoring points closest to the second target monitoring point among all monitoring points corresponding to the conventional pole-mounted recloser pole are determined as second reference monitoring points; Determine the corrosion analysis weight of the second target monitoring point according to the coordinate value of the second target monitoring point on each coordinate axis and the coordinate value of each second reference monitoring point on each coordinate axis; The method of determining the salt mist accumulation index of the first target monitoring point according to the coordinate value of the first target monitoring point on each coordinate axis and the coordinate value of each first reference monitoring point on each coordinate axis includes: The coordinate axis representing the height among all the coordinate axes is taken as the target coordinate axis, and the maximum coordinate value and the minimum coordinate value of all the reference monitoring points on the target coordinate axis are determined; Analyze the local height situation in combination with the coordinate value of the first target monitoring point on the target coordinate axis and the maximum coordinate value and the minimum coordinate value to determine the salt fog accumulation index of the first target monitoring point; The step of determining the corrosion analysis weight of the first target monitoring point according to the profile difference index and the salt spray accumulation index of the first target monitoring point includes: Calculating the product of the profile difference index and the salt spray accumulation index of the first target monitoring point as a first product; normalizing the first product to obtain a corrosion analysis weight of the first target monitoring point; When calculating the corrosion analysis weight of the second target monitoring point of the traditional pole-mounted recloser, the calculation process of the salt spray accumulation index of the first target monitoring point is referred to, and then the salt spray accumulation index of the second target monitoring point obtained by calculation is normalized to obtain the corrosion analysis weight of the second target monitoring point.

2. The salt spray corrosion resistance test method of a novel 10kV pole-mounted recloser pole according to claim 1 is characterized in that: Determining the salt spray tolerance index of each monitoring point according to the difference between the grayscale value of each monitoring point in each static frame image and the grayscale value in the initial static frame image includes: For any monitoring point, the absolute value of the difference between the grayscale value of the monitoring point in each static frame image and the grayscale value in the initial static frame image is calculated as the corrosion degree of the monitoring point in each static frame image; A coordinate system is constructed according to the acquisition time of each static frame image and the corrosion degree in each static frame image to obtain a dynamic salt spray corrosion curve; The change in corrosion degree is analyzed according to the position information of each data point in the dynamic salt spray corrosion curve, and the salt spray tolerance index of the monitoring point is determined.

3. The salt spray corrosion resistance test method of a novel 10kV pole-mounted recloser pole according to claim 2 is characterized in that: The method of analyzing the change in corrosion degree according to the position information of each data point in the dynamic salt spray corrosion curve and determining the salt spray tolerance index of the monitoring point includes: Performing straight line fitting on the dynamic salt spray corrosion curve to obtain the slope of the fitting straight line; Calculating the product of the slope of the fitting straight line and the average value of the corrosion degree of all data points on the dynamic salt spray corrosion curve as the second product; The second product is subjected to negative correlation normalization processing to obtain the salt spray tolerance index of the monitoring point.

4. The novel salt spray corrosion resistance test method of a 10kV pole-mounted recloser pole according to claim 1 is characterized in that: Determining the quality grade of the new pole-mounted recloser pole according to the salt spray corrosion resistance index of the new pole-mounted recloser pole includes: If the salt spray corrosion resistance index of the new pole-mounted recloser pole is less than the first index threshold, it is determined that the new pole-mounted recloser pole belongs to the first quality grade; If the salt spray corrosion resistance index of the new pole-mounted recloser pole is greater than or equal to the first index threshold and less than the second index threshold, the new pole-mounted recloser pole is determined to belong to the second quality grade; If the salt spray corrosion resistance index of the new pole-mounted recloser pole is greater than or equal to the second index threshold, the new pole-mounted recloser pole is determined to belong to the third quality level; The first indicator threshold is smaller than the second indicator threshold, the first quality level is smaller than the second quality level, and the second quality level is smaller than the third quality level.

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