Branch cable branch wrapping part armor layer recovery process

Abstract

The invention discloses a branch cable branch wrapping part armor layer restoration technology, and relates to the branch cable production technology field, and the technology comprises the following preparation steps: carrying out image acquisition on a branch of a branch cable, carrying out identification on a cable contour at the branch, carrying out simplification processing on the identified cable contour at the branch, and obtaining a restoration result of the branch wrapping part armor layer; calculating theoretical parameters of the armored recovery layer of the branch cable; processing parameters of the current branch cable are collected, parameters of armored recovery layer molds of different specifications are preset, and armored recovery layer mold matching is carried out on the current branch cable in combination with theoretical parameters of a recovery layer of the current branch cable; and carrying out armor recovery layer extrusion coating on the current branch cable through the armor recovery layer mold, and carrying out armor recovery on the branch coating part at the armor recovery layer. According to the invention, the irregular parameters of the branch wrapping part of the branch cable are collected, and the armoring recovery layers of different branch cables are matched through the preset mold, so that the recovery continuity and consistency of the armoring layers of the branch wrapping part are improved.

Description

Technical Field

[0001] This invention relates to the field of branch cable manufacturing technology, and more specifically, to a process for restoring the armor layer of the branch section of a branch cable. Background Technology

[0002] In power transmission systems, branch cables are an important power distribution device and are widely used in various buildings, factories and infrastructure. The branch sheath of a branch cable is a key node in the cable structure, and the integrity and restoration quality of its armor layer play a vital role in the performance and service life of the cable.

[0003] In the traditional process of manufacturing branch cables, the branch connections of different cables result in complex and varied shapes at the branch packages, making it difficult to effectively restore the armor of the branch cable packages. This significantly reduces the protective capability of the branch cable against external mechanical damage. The irregular shape and size of the branch packages make it difficult to achieve uniform processing of irregular branch packages, resulting in the armor layer restoration quality failing to achieve the desired effect and leading to low practicality.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Summary of the Invention

[0005] To address the problems in related technologies, this invention proposes a process for restoring the armor layer of the branch cable branch package, thereby overcoming the aforementioned technical problems existing in the prior art.

[0006] Therefore, the specific technical solution adopted by the present invention is as follows:

[0007] A process for restoring the armor layer of a branch cable branch sheath, characterized by comprising the following preparation steps:

[0008] S1. Acquire images of the branch cable branch, identify the cable outline at the branch, simplify the identified cable outline at the branch, and calculate the theoretical parameters of the armor restoration layer of the branch cable.

[0009] S2. Collect the current branch cable processing parameters, preset the armor restoration layer mold parameters of different specifications, and match the armor restoration layer mold of the current branch cable with the theoretical parameters of the current branch cable restoration layer.

[0010] S3. The current branch cable is extruded and wrapped with the armor restoration layer through the armor restoration layer mold. The branch wrapping part is armored and restored at the armor restoration layer. Then the outer sheath of the branch cable is completed in the extruder.

[0011] In a preferred embodiment, step S1 includes the following steps:

[0012] S11. Take an image of the branch point of the branch cable where the branch cable connection has been completed, identify the outline of the branch cable in the captured image through an edge detection algorithm, and convert the image into two-dimensional lines and establish a coordinate system;

[0013] S12. Extract the parameters of the branch cable in the coordinate system, calculate the theoretical parameters of the armor restoration layer of the current branch cable, including the cross-sectional area and length of the armor restoration layer, establish an armor restoration layer database through MySQL, and record the armor restoration layer parameters of the current branch cable.

[0014] In a preferred embodiment, S11 includes the following steps:

[0015] S111. Use an industrial camera to capture multi-angle images of the branch points of the branched cables that have been connected, including top view and side view, and perform grayscale processing on the captured images.

[0016] S112. Perform contour recognition on the processed acquired image using the Sobel operator, extract the branch cable contour, and perform line processing on the branch cable contour. Establish a coordinate system on a blank page and project the line-processed branch cable contour. Specifically, this includes the following steps:

[0017] The acquired image is smoothed by Gaussian filtering, the gradient magnitude and direction of the image are calculated by Sobel operator, non-edge pixels are removed by non-maximum suppression, and the gradient magnitude is divided into strong edge, weak edge and non-edge pixels by double thresholding. Weak edge pixels are connected to strong edge pixels to form the edge contour of the complete branch cable.

[0018] For the extracted contour edges, the Zhang-Suen thinning algorithm is used to further refine the edge pixels to achieve contour edge line processing. The image is binary processed, and pixels with gradient magnitude greater than the binary threshold are set to 255, and pixels with gradient magnitude less than the binary threshold are set to 0. The binary image is used as input, where the foreground contour pixel value is 1 and the background pixel value is 0. The Zhang-Suen thinning algorithm is used for iterative thinning to remove non-skeleton pixels on the contour until no more can be removed, and the contour is thinned into a single pixel wide line.

[0019] Establish a coordinate system on a blank page, project the outline of the branch cable (processed into lines) into the current coordinate system, and convert the pixel coordinates into actual physical coordinates based on the ratio between the pixel coordinates of the image and the actual physical size.

[0020] In a preferred embodiment, S12 includes the following steps:

[0021] S121. Based on the contour projection results, calculate the theoretical parameters of the armor restoration layer of the current branch cable, including the cross-sectional area and length of the armor restoration layer, including the following steps:

[0022] In the side view projection, the projected outline of the branch cable is approximated as a polygon, and the cross-sectional area of ​​the branch cable is obtained by calculating the area of ​​the polygon. :

[0023] ;

[0024] in, This represents the number of vertices of the polygon formed by the outline. This is an index variable, with values ​​ranging from 1 to n-1. Represents the coordinates of the i-th vertex of the polygon;

[0025] In the top-view projection, the outline of the branch cable is approximated as a broken line, and the length of the branch cable is obtained by calculating the length of the broken line. :

[0026] ;

[0027] in, The number of vertices of the polyline that forms the contour. This is an index variable, with values ​​ranging from 1 to m-1. This represents the coordinates of the j-th vertex in the polyline. This represents the coordinates of the (j+1)th vertex in the polyline, which is adjacent to the jth vertex.

[0028] S122, Cross-sectional area based on branch cable With the length of the branch cable The theoretical parameters of the armor restoration layer are calculated, specifically including the following steps:

[0029] Among them, the length of the armor restoration layer Cross-sectional area of ​​armor restoration layer ,in To provide a safety margin for the cross-sectional area of ​​the armor restoration layer, an armor restoration layer database was established using MySQL. A file was created for each measured branch cable, and the armor restoration layer parameters of the branch cable were recorded.

[0030] In a preferred embodiment, S2 includes the following steps:

[0031] S21. Collect historical parameters of the armor restoration layer during the current branch cable processing, and preset the mold parameters of different specifications of armor restoration layer based on the historical parameters. This includes the following steps:

[0032] The current branch cable is classified according to the collected historical armor restoration layer parameters using the K-means clustering algorithm, and the sum of squared errors within the cluster is calculated using the elbow rule. Determine the number of armor restoration layer molds :

[0033] ;

[0034] in, It is the number of clusters. Represents the i-th cluster, These are data points within a cluster. Representing the centroid of the i-th cluster, through Obtain the number of armor restoration layer molds ;

[0035] Randomly selected from the dataset Using 10 data points as the initial centroids, for each data point in the dataset, calculate the Euclidean distance between the data point and each centroid, assign the data point to the cluster containing the nearest centroid, and calculate the mean of all data points in each cluster, using it as the new centroid. This process is iterated until the centroids no longer change significantly or the maximum number of iterations is reached.

[0036] For each defined cluster, the mean value of each parameter of its internal data points is calculated as the representative mold parameter of that category, and the preset armor restoration layer mold parameter is obtained.

[0037] S22. Based on the theoretical parameters of the armor restoration layer of the current branch cable, perform armor restoration layer mold matching for the current branch cable, specifically including the following steps:

[0038] For the current branch cable armor restoration layer, its theoretical parameters are organized into a vector. For each category of representative mold parameters, obtain the mold vector. ,in These represent the cross-sectional area and length of the preset armor restoration layer of the Nth mold, respectively;

[0039] For each category of representative molds, the distance between the theoretical parameter vector of the current branch cable armor restoration layer and the parameter vector of the representative mold of that category is calculated using the Euclidean distance formula. The index category corresponding to the minimum distance value is determined from the distance values ​​obtained by Euclidean distance, which is the mold that matches the current branch cable armor restoration layer.

[0040] In a preferred embodiment, step S3 includes the following steps:

[0041] S31. Using the armor restoration layer mold obtained by screening the theoretical armor restoration layer parameters of the current branch cable, the current branch cable is extruded and coated with the armor restoration layer.

[0042] S32. The surface of the armor restoration layer of the branch package is treated by grinding and cleaning. The steel strip armor of the branch package is restored at the armor restoration layer. Then the outer sheath of the branch cable is completed in the extruder.

[0043] In a preferred embodiment, the raw material for extrusion coating in S31 consists of 100 parts of SG-5 type polyvinyl chloride resin, 35 parts of dioctyl phthalate, 5 parts of epoxidized soybean oil, 3 parts of tribasic lead sulfate, 2 parts of dibasic lead phosphite, 0.5 parts of stearic acid, and 10 parts of light calcium carbonate.

[0044] In a preferred embodiment, the specific steps of the extrusion coating are as follows:

[0045] Step 1: Weigh each component material according to the raw material fraction. Add polyvinyl chloride resin to a high-speed mixer. Start the mixer and then add dioctyl phthalate, epoxidized soybean oil, tribasic lead sulfate, dibasic lead phosphite, and stearic acid in sequence. Finally, add calcium carbonate. The mixer speed is 1000 r / min, the mixing time is 20 minutes, and the mixing temperature is controlled at 120℃ to obtain the mixture.

[0046] The second step is to feed the mixture into a twin-screw extruder through a feeding device, heat, plasticize, and mix it, and then extrude it from the die head into strips. The strips are then cut into uniform granules by a pelletizer to obtain plastic particles.

[0047] The third step is to add plastic particles into the hopper of a single-screw extruder, heat and plasticize the material and extrude it, so that the material is evenly coated on the branch part of the current branch cable through the armor restoration layer mold, and then cooled and shaped to complete the armor restoration layer coating.

[0048] In a preferred embodiment, the temperatures of each section of the twin-screw extruder are set as follows: Zone 1: 155°C, Zone 2: 165°C, Zone 3: 170°C, Zone 4: 180°C, and Die Head: 190°C, with a screw speed of 80 r / min. The temperatures of each section of the single-screw extruder are set as follows: Zone 1: 160°C, Zone 2: 170°C, Zone 3: 180°C, and Die Head: 190°C, with a screw speed of 60 r / min.

[0049] The beneficial effects of this invention are as follows:

[0050] 1. This invention collects branch package parameters during the branch cable manufacturing process, calculates theoretical parameters of the armor restoration layer based on cable parameters at the branch points during different branch cable manufacturing processes, and establishes a preset mold to match the theoretical parameters of the armor restoration layer of the current branch cable by collecting historical armor restoration layer parameters of the current branch cable. The armor restoration layer unifies irregular branch packages, and the preset mold standardizes the armor restoration process in actual production, thereby enhancing the continuity and smoothness of the armor restoration process.

[0051] 2. This invention enables the armor restoration layer to better wrap the branch package through a preset mold, forming a good sealing structure. At the same time, it standardizes the parameters of the subsequent steel strip armor restoration equipment, which facilitates the uniform restoration of the armor during the branch cable production process, improves the insulation performance and electrical reliability of the cable, and ensures the stability and safety of power transmission.

[0052] 3. By adopting a pre-set mold and a standardized armor restoration process, this invention avoids the time wastage caused by unfamiliarity with the operation and inconsistent processes in traditional manual operation. By operating quickly and accurately according to the established process and parameters, the production time of branch cable armor restoration is shortened, and production efficiency and product stability are improved. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0054] Figure 1 This is a flowchart of a process for restoring the armor layer of a branch cable branch package according to an embodiment of the present invention. Detailed Implementation

[0055] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0056] According to an embodiment of the present invention, a process for restoring the armor layer of the branch package portion of a branch cable is provided.

[0057] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments:

[0058] Example 1:

[0059] A process for restoring the armor layer of a branch cable branch sheath, characterized by comprising the following preparation steps:

[0060] S1. Acquire images of the branch cable branch, identify the cable outline at the branch, simplify the identified cable outline at the branch, and calculate the theoretical parameters of the armor restoration layer of the branch cable.

[0061] S11. Take an image of the branch point of the branch cable where the branch cable connection has been completed, identify the outline of the branch cable in the captured image through an edge detection algorithm, and convert the image into two-dimensional lines and establish a coordinate system;

[0062] S111. Use an industrial camera to capture multi-angle images of the branch points of the branched cables that have been connected, including top view and side view, and perform grayscale processing on the captured images.

[0063] It should be noted that the specific industrial camera needs to be determined based on the specifications of the current branch cable. The camera's shooting parameters, including resolution, ISO, shutter speed, and aperture, need to be set according to the actual application scenario. Converting the acquired image to grayscale can simplify subsequent data processing. Converting the image to grayscale and acquiring the image from multiple angles facilitates subsequent analysis of armor restoration layer parameters.

[0064] S112. Perform contour recognition on the processed acquired image using the Sobel operator, extract the branch cable contour, and perform line processing on the branch cable contour. Establish a coordinate system on a blank page and project the line-processed branch cable contour. Specifically, this includes the following steps:

[0065] The acquired image is smoothed by Gaussian filtering, the gradient magnitude and direction of the image are calculated by Sobel operator, non-edge pixels are removed by non-maximum suppression, and the gradient magnitude is divided into strong edge, weak edge and non-edge pixels by double thresholding. Weak edge pixels are connected to strong edge pixels to form the edge contour of the complete branch cable.

[0066] It should be noted that Gaussian filtering involves convolution of the image and weighted averaging of neighboring pixels according to the weights of the Gaussian function to reduce noise in the image. Pixels with gradient magnitudes greater than the high threshold are identified as strong edge points, while those with gradient magnitudes less than the low threshold are identified as non-edge points. For pixels with gradient magnitudes between the high and low thresholds, they are considered strong edge points if connected to strong edge points, and non-edge points if connected to non-edge points. The high and low thresholds need to be set empirically, taking into account the device parameters in the current scenario and consulting experts in the relevant field.

[0067] For the extracted contour edges, the Zhang-Suen thinning algorithm is used to further refine the edge pixels to achieve contour edge line processing. The image is binary processed, and pixels with gradient magnitude greater than the binary threshold are set to 255, and pixels with gradient magnitude less than the binary threshold are set to 0. The binary image is used as input, where the foreground contour pixel value is 1 and the background pixel value is 0. The Zhang-Suen thinning algorithm is used for iterative thinning to remove non-skeleton pixels on the contour until no more can be removed, and the contour is thinned into a single pixel wide line.

[0068] It should be noted that in the process of selecting a binary threshold, it is necessary to combine the gray-level distribution of the gradient magnitude image in actual use, select different thresholds, and apply them to the image for binarization processing. The binary threshold is determined by comparing the effect of the binarized image under different thresholds. The threshold that can make the target object and the background most clearly distinguishable is selected. When iteratively thinning with the Zhang-Suen thinning algorithm, the steps need to be repeated until no pixel is marked as to be deleted in one iteration, at which point the Zhang-Suen thinning algorithm ends. The image obtained at this time is the thinned single-pixel wide line.

[0069] Establish a coordinate system on a blank page, project the outline of the branch cable (processed into lines) into the current coordinate system, and convert the pixel coordinates into actual physical coordinates based on the ratio between the pixel coordinates of the image and the actual physical size.

[0070] S12. Extract the parameters of the branch cable in the coordinate system, calculate the theoretical parameters of the armor restoration layer of the current branch cable, including the cross-sectional area and length of the armor restoration layer, establish an armor restoration layer database through MySQL, and record the armor restoration layer parameters of the current branch cable.

[0071] S121. Based on the contour projection results, calculate the theoretical parameters of the armor restoration layer of the current branch cable, including the cross-sectional area and length of the armor restoration layer, including the following steps:

[0072] In the side view projection, the projected outline of the branch cable is approximated as a polygon, and the cross-sectional area of ​​the branch cable is obtained by calculating the area of ​​the polygon. :

[0073] ;

[0074] in, This represents the number of vertices of the polygon formed by the outline. This is an index variable, with values ​​ranging from 1 to n-1. Represents the coordinates of the i-th vertex of the polygon;

[0075] In the top-view projection, the outline of the branch cable is approximated as a broken line, and the length of the branch cable is obtained by calculating the length of the broken line. :

[0076] ;

[0077] in, The number of vertices of the polyline that forms the contour. This is an index variable, with values ​​ranging from 1 to m-1. This represents the coordinates of the j-th vertex in the polyline. This represents the coordinates of the (j+1)th vertex in the polyline, which is adjacent to the jth vertex.

[0078] It should be noted that when calculating the length of a branch cable using the broken line approximation method, the outline of the area after stripping and re-armoring is usually a complex spatial curve. The most realistic path from the stripping start point to the end point is the arc length measured along this curve. The broken line approximation method simulates the actual curve by selecting several vertices on the curve and connecting these points sequentially with straight lines. Its length will be greater than the actual stripping length of the branch cable, thus leaving a safety margin for the subsequent calculation of the restoration layer.

[0079] S122, Cross-sectional area based on branch cable With the length of the branch cable The theoretical parameters of the armor restoration layer are calculated, specifically including the following steps:

[0080] Among them, the length of the armor restoration layer Cross-sectional area of ​​armor restoration layer ,in To provide a safety margin for the cross-sectional area of ​​the armor restoration layer, an armor restoration layer database was established using MySQL. A file was created for each measured branch cable, and the armor restoration layer parameters of the branch cable were recorded.

[0081] It should be noted that the safety margin of the cross-sectional area of ​​the armor restoration layer is to ensure that the restoration layer can completely wrap the entire branch cable. The specific safety margin needs to be set by consulting experts in the relevant field, based on the specifications of the current branch cable. Since the length of the branch cable obtained by the broken line approximation method will be greater than the actual stripping length of the branch cable, no safety margin needs to be set.

[0082] S2. Collect the current branch cable processing parameters, preset the armor restoration layer mold parameters of different specifications, and match the armor restoration layer mold of the current branch cable with the theoretical parameters of the current branch cable restoration layer.

[0083] S21. Collect historical parameters of the armor restoration layer during the current branch cable processing, and preset the mold parameters of different specifications of armor restoration layer based on the historical parameters. This includes the following steps:

[0084] The current branch cable is classified according to the collected historical armor restoration layer parameters using the K-means clustering algorithm, and the sum of squared errors within the cluster is calculated using the elbow rule. Determine the number of armor restoration layer molds :

[0085] ;

[0086] in, It is the number of clusters. Represents the i-th cluster, These are data points within a cluster. Representing the centroid of the i-th cluster, through Obtain the number of armor restoration layer molds ;

[0087] It should be noted that SSE will gradually decrease during the calculation process. When K increases to a certain extent, the rate of decrease of SSE will slow down. At this point, the corresponding K value is the appropriate N value.

[0088] Randomly selected from the dataset Using 10 data points as the initial centroids, for each data point in the dataset, calculate the Euclidean distance between the data point and each centroid, assign the data point to the cluster containing the nearest centroid, and calculate the mean of all data points in each cluster, using it as the new centroid. This process is iterated until the centroids no longer change significantly or the maximum number of iterations is reached.

[0089] For each defined cluster, the mean value of each parameter of its internal data points is calculated as the representative mold parameter of that category, and the preset armor restoration layer mold parameter is obtained.

[0090] S22. Based on the theoretical parameters of the armor restoration layer of the current branch cable, perform armor restoration layer mold matching for the current branch cable, specifically including the following steps:

[0091] For the current branch cable armor restoration layer, its theoretical parameters are organized into a vector. For each category of representative mold parameters, obtain the mold vector. ,in These represent the cross-sectional area and length of the preset armor restoration layer of the Nth mold, respectively;

[0092] For each category of representative molds, the distance between the theoretical parameter vector of the current branch cable armor restoration layer and the parameter vector of the representative mold of that category is calculated using the Euclidean distance formula. The index category corresponding to the minimum distance value is determined from the distance values ​​obtained by Euclidean distance, which is the mold that matches the current branch cable armor restoration layer.

[0093] It should be noted that Euclidean distance is a commonly used method to measure the distance between two vectors. The degree of similarity between two vectors can be determined by Euclidean distance.

[0094] Example 2:

[0095] S3. The current branch cable is extruded and wrapped with the armor restoration layer through the armor restoration layer mold. The branch wrapping part is armored and restored at the armor restoration layer. Then the outer sheath of the branch cable is completed in the extruder.

[0096] S31. Using the armor restoration layer mold obtained by screening the theoretical armor restoration layer parameters of the current branch cable, the current branch cable is extruded and coated with the armor restoration layer.

[0097] S32. The surface of the armor restoration layer of the branch package is treated by grinding and cleaning. The steel strip armor of the branch package is restored at the armor restoration layer. Then the outer sheath of the branch cable is completed in the extruder.

[0098] It should be noted that by setting the parameters of the representative mold, the parameters of the armored steel strip can be preset for different representative molds, so as to facilitate the rapid restoration of the armored steel strip in the actual production process.

[0099] Example 3:

[0100] The extrusion coating material in S31 consists of 100 parts of SG-5 type polyvinyl chloride resin, 35 parts of dioctyl phthalate, 5 parts of epoxidized soybean oil, 3 parts of tribasic lead sulfate, 2 parts of dibasic lead phosphite, 0.5 parts of stearic acid, and 10 parts of light calcium carbonate.

[0101] The specific steps for extruding the coating are as follows:

[0102] Step 1: Weigh each component material according to the raw material fraction. Add polyvinyl chloride resin to a high-speed mixer. Start the mixer and then add dioctyl phthalate, epoxidized soybean oil, tribasic lead sulfate, dibasic lead phosphite, and stearic acid in sequence. Finally, add calcium carbonate. The mixer speed is 1000 r / min, the mixing time is 20 minutes, and the mixing temperature is controlled at 120℃ to obtain the mixture.

[0103] The second step is to feed the mixture into a twin-screw extruder through a feeding device, heat, plasticize, and mix it, and then extrude it from the die head into strips. The strips are then cut into uniform granules by a pelletizer to obtain plastic particles.

[0104] The third step is to add plastic particles into the hopper of a single-screw extruder, heat and plasticize the material and extrude it, so that the material is evenly coated on the branch part of the current branch cable through the armor restoration layer mold, and then cooled and shaped to complete the armor restoration layer coating.

[0105] The twin-screw extruder has the following temperature settings: Zone 1: 155℃, Zone 2: 165℃, Zone 3: 170℃, Zone 4: 180℃, and Die Head: 190℃. The screw speed is 80 r / min. The single-screw extruder has the following temperature settings: Zone 1: 160℃, Zone 2: 170℃, Zone 3: 180℃, and Die Head: 190℃. The screw speed is 60 r / min.

[0106] In summary, this invention collects branch package parameters during the branch cable manufacturing process, calculates theoretical parameters of the armor restoration layer based on cable parameters at the branch points during different branch cable manufacturing processes, and establishes a preset mold to match the theoretical parameters of the armor restoration layer of the current branch cable by collecting historical armor restoration layer parameters of the current branch cable. The armor restoration layer unifies irregular branch packages, and the preset mold standardizes the armor restoration process in actual production, thereby enhancing the continuity and smoothness of the armor restoration process.

[0107] By using pre-set molds, the armor restoration layer can better wrap the branch package, forming a good sealing structure. At the same time, the parameters of the subsequent steel tape armor restoration equipment are standardized, which facilitates the uniform restoration of the armor during the branch cable production process, improves the insulation performance and electrical reliability of the cable, and ensures the stability and safety of power transmission. By adopting pre-set molds and standardized armor restoration processes, the time wasted due to unfamiliarity with the operation and inconsistent processes in traditional manual operations is avoided. By operating quickly and accurately according to the established process and parameters, the production time of branch cable armor restoration is shortened, and production efficiency and product stability are improved.

[0108] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A process for restoring the armor layer of a branch cable branch sheath, characterized in that, The preparation steps include the following: S1. Acquire images of the branch cable branch, identify the cable outline at the branch, simplify the identified cable outline at the branch, and calculate the theoretical parameters of the armor restoration layer of the branch cable. S2. Collect the current branch cable processing parameters, preset the armor restoration layer mold parameters of different specifications, and match the armor restoration layer mold of the current branch cable with the theoretical parameters of the current branch cable restoration layer. S3. The current branch cable is extruded and wrapped with the armor restoration layer through the armor restoration layer mold. The branch wrapping part is armored and restored at the armor restoration layer. Then the outer sheath of the branch cable is completed in the extruder.

2. The process for restoring the armor layer of a branch cable branch sheath as described in claim 1, characterized in that, S1 includes the following steps: S11. Take an image of the branch point of the branch cable where the branch cable connection has been completed, identify the outline of the branch cable in the captured image through an edge detection algorithm, and convert the image into two-dimensional lines and establish a coordinate system; S12. Extract the parameters of the branch cable in the coordinate system, calculate the theoretical parameters of the armor restoration layer of the current branch cable, including the cross-sectional area and length of the armor restoration layer, establish an armor restoration layer database through MySQL, and record the armor restoration layer parameters of the current branch cable.

3. The process for restoring the armor layer of a branch cable branch sheath as described in claim 2, characterized in that, S11 includes the following steps: S111. Use an industrial camera to capture multi-angle images of the branch points of the branched cables that have been connected, including top view and side view, and perform grayscale processing on the captured images. S112. Perform contour recognition on the processed acquired image using the Sobel operator, extract the branch cable contour, and perform line processing on the branch cable contour. Establish a coordinate system on a blank page and project the line-processed branch cable contour. Specifically, this includes the following steps: The acquired image is smoothed by Gaussian filtering, the gradient magnitude and direction of the image are calculated by Sobel operator, non-edge pixels are removed by non-maximum suppression, and the gradient magnitude is divided into strong edge, weak edge and non-edge pixels by double thresholding. Weak edge pixels are connected to strong edge pixels to form the edge contour of the complete branch cable. For the extracted contour edges, the Zhang-Suen thinning algorithm is used to further refine the edge pixels to achieve contour edge line processing. The image is binary processed, and pixels with gradient magnitude greater than the binary threshold are set to 255, and pixels with gradient magnitude less than the binary threshold are set to 0. The binary image is used as input, where the foreground contour pixel value is 1 and the background pixel value is 0. The Zhang-Suen thinning algorithm is used for iterative thinning to remove non-skeleton pixels on the contour until no more can be removed, and the contour is thinned into a single pixel wide line. Establish a coordinate system on a blank page, project the outline of the branch cable (processed into lines) into the current coordinate system, and convert the pixel coordinates into actual physical coordinates based on the ratio between the pixel coordinates of the image and the actual physical size.

4. The process for restoring the armor layer of a branch cable branch sheath as described in claim 3, characterized in that, S12 includes the following steps: S121. Based on the contour projection results, calculate the theoretical parameters of the armor restoration layer of the current branch cable, including the cross-sectional area and length of the armor restoration layer, including the following steps: In the side view projection, the projected outline of the branch cable is approximated as a polygon, and the cross-sectional area of ​​the branch cable is obtained by calculating the area of ​​the polygon. : ； in, This represents the number of vertices of the polygon formed by the outline. This is an index variable, with values ​​ranging from 1 to n-1. Represents the coordinates of the i-th vertex of the polygon; In the top-view projection, the outline of the branch cable is approximated as a broken line, and the length of the branch cable is obtained by calculating the length of the broken line. : ； in, The number of vertices of the polyline that forms the contour. This is an index variable, with values ​​ranging from 1 to m-1. This represents the coordinates of the j-th vertex in the polyline. This represents the coordinates of the (j+1)th vertex in the polyline, which is adjacent to the jth vertex. S122, Cross-sectional area based on branch cable With the length of the branch cable The theoretical parameters of the armor restoration layer are calculated, specifically including the following steps: Among them, the length of the armor restoration layer Cross-sectional area of ​​armor restoration layer ,in To provide a safety margin for the cross-sectional area of ​​the armor restoration layer, an armor restoration layer database was established using MySQL. A file was created for each measured branch cable, and the armor restoration layer parameters of the branch cable were recorded.

5. The process for restoring the armor layer of a branch cable branch sheath according to claim 4, characterized in that, S2 includes the following steps: S21. Collect historical parameters of the armor restoration layer during the current branch cable processing, and preset the mold parameters of different specifications of armor restoration layer based on the historical parameters. This includes the following steps: The current branch cable is classified according to the collected historical armor restoration layer parameters using the K-means clustering algorithm, and the sum of squared errors within the cluster is calculated using the elbow rule. Determine the number of armor restoration layer molds : ； in, It is the number of clusters. Represents the i-th cluster, These are data points within a cluster. Representing the centroid of the i-th cluster, through Obtain the number of armor restoration layer molds ; Randomly selected from the dataset Using 10 data points as the initial centroids, for each data point in the dataset, calculate the Euclidean distance between the data point and each centroid, assign the data point to the cluster containing the nearest centroid, and calculate the mean of all data points in each cluster, using it as the new centroid. This process is iterated until the centroids no longer change significantly or the maximum number of iterations is reached. For each defined cluster, the mean value of each parameter of its internal data points is calculated as the representative mold parameter of that category, and the preset armor restoration layer mold parameter is obtained. S22. Based on the theoretical parameters of the armor restoration layer of the current branch cable, perform armor restoration layer mold matching for the current branch cable, specifically including the following steps: For the current branch cable armor restoration layer, its theoretical parameters are organized into a vector. For each category of representative mold parameters, obtain the mold vector. ,in These represent the cross-sectional area and length of the preset armor restoration layer of the Nth mold, respectively; For each category of representative molds, the distance between the theoretical parameter vector of the current branch cable armor restoration layer and the parameter vector of the representative mold of that category is calculated using the Euclidean distance formula. The index category corresponding to the minimum distance value is determined from the distance values ​​obtained by Euclidean distance, which is the mold that matches the current branch cable armor restoration layer.

6. The process for restoring the armor layer of a branch cable branch sheath according to claim 5, characterized in that, S3 includes the following steps: S31. Using the armor restoration layer mold obtained by screening the theoretical armor restoration layer parameters of the current branch cable, the current branch cable is extruded and coated with the armor restoration layer. S32. The surface of the armor restoration layer of the branch package is treated by grinding and cleaning. The steel strip armor of the branch package is restored at the armor restoration layer. Then the outer sheath of the branch cable is completed in the extruder.

7. The process for restoring the armor layer of a branch cable branch sheath as described in claim 6, characterized in that, The extrusion coating material in S31 consists of 100 parts of SG-5 type polyvinyl chloride resin, 35 parts of dioctyl phthalate, 5 parts of epoxidized soybean oil, 3 parts of tribasic lead sulfate, 2 parts of dibasic lead phosphite, 0.5 parts of stearic acid, and 10 parts of light calcium carbonate.

8. The process for restoring the armor layer of a branch cable branch sheath as described in claim 6, characterized in that, The specific steps of the extrusion coating are as follows: Step 1: Weigh each component material according to the raw material fraction. Add polyvinyl chloride resin to a high-speed mixer. Start the mixer and then add dioctyl phthalate, epoxidized soybean oil, tribasic lead sulfate, dibasic lead phosphite, and stearic acid in sequence. Finally, add calcium carbonate. The mixer speed is 1000 r / min, the mixing time is 20 minutes, and the mixing temperature is controlled at 120℃ to obtain the mixture. The second step is to feed the mixture into a twin-screw extruder through a feeding device, heat, plasticize, and mix it, and then extrude it from the die head into strips. The strips are then cut into uniform granules by a pelletizer to obtain plastic particles. The third step is to add plastic particles into the hopper of a single-screw extruder, heat and plasticize the material and extrude it, so that the material is evenly coated on the branch part of the current branch cable through the armor restoration layer mold, and then cooled and shaped to complete the armor restoration layer coating.

9. The process for restoring the armor layer of a branch cable branch sheath according to claim 7, characterized in that: The twin-screw extruder has the following temperature settings: Zone 1: 155℃, Zone 2: 165℃, Zone 3: 170℃, Zone 4: 180℃, and Die Head: 190℃. The screw speed is 80 r / min. The single-screw extruder has the following temperature settings: Zone 1: 160℃, Zone 2: 170℃, Zone 3: 180℃, and Die Head: 190℃. The screw speed is 60 r / min.

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