Transmission tower cable loosening detection method and device

Abstract

The present invention provides a method and device for detecting loose cables of a transmission tower. The method comprises the following steps: obtaining an overhead image of a target transmission tower by a detection device based on a primary inspection path, and determining a loose monitoring group according to the relative position relationship of each cable to be inspected in the overhead image; determining a secondary inspection path of the detection device based on the overhead image, and obtaining a comparison image group of the loose monitoring group taken by the inspection device based on the secondary inspection path; performing deformation analysis on each cable to be inspected in the loose monitoring group according to the comparison image group, and obtaining deformation judgment data corresponding to the loose monitoring group; and generating loose monitoring data corresponding to the target transmission tower based on the deformation judgment data and sending the data to a management end.

Description

Technical Field

[0001] The invention relates to data detection technology, and in particular to a method and device for detecting looseness of a transmission tower cable. Background Art

[0002] The cables in the transmission tower are used to tighten diagonally between the line spans to increase the stability of the tower. As an important infrastructure for power transmission, its stability and safety are directly related to the normal operation of the power system.

[0003] If the cable is loose, it may affect the operation of the power system. In the prior art, when detecting the looseness of the cable, the inspector usually uses visual inspection to check the looseness of the cable, such as checking whether the connecting parts of the cable are tight and whether the cable is deformed, and judging the looseness of the cable based on the data. However, this method is greatly affected by human factors, and there may be missed detection or misjudgment, which reduces the detection efficiency.

[0004] Therefore, how to improve the accuracy and efficiency of loose cable detection in transmission towers has become an urgent problem that needs to be solved. Summary of the invention

[0005] The invention provides a method and a device for detecting loose cables in a power transmission tower, which can improve the accuracy and efficiency of detecting loose cables in the power transmission tower.

[0006] A first aspect of the present invention provides a method for detecting looseness of a transmission tower cable, comprising:

[0007] Obtain an overhead image of the target transmission tower taken by the detection equipment based on the primary inspection path, and determine a looseness monitoring group according to the relative position relationship of each cable to be inspected in the overhead image;

[0008] Determine a secondary inspection path of the detection device based on the overhead image, and obtain a comparison image group taken by the inspection device on the looseness monitoring group based on the secondary inspection path;

[0009] Performing deformation analysis on each of the cables to be inspected in the looseness monitoring group according to the comparison image group to obtain deformation judgment data corresponding to the looseness monitoring group;

[0010] The looseness monitoring data corresponding to the target transmission tower is generated based on the deformation judgment data and sent to the management end.

[0011] Optionally, in a possible implementation of the first aspect, obtaining an overhead image of a target transmission tower by a detection device based on a primary inspection path, and determining a looseness monitoring group according to a relative position relationship of each to-be-inspected cable in the overhead image, includes:

[0012] Determine the monitoring position point corresponding to the target transmission tower according to the primary inspection path, and obtain the overhead image of the detection device based on the monitoring position point;

[0013] Extracting the cable contours corresponding to the cables to be inspected and the tower contours corresponding to the target transmission tower in the overhead image;

[0014] Performing linear fitting processing on the cable contour to obtain a cable segment corresponding to the cable to be inspected, and determining an end point of the cable segment that intersects with the tower contour as a fixed starting point;

[0015] Obtaining the interval distance between the fixed starting points of each of the cable segments, and determining that the relative position relationship between the cables to be inspected whose interval distance is less than or equal to the joint distance threshold is a coordinated position relationship;

[0016] Determine that the relative position relationship between the cables to be inspected whose interval distance is greater than the joint distance threshold is a separate position relationship;

[0017] According to the relative position relationship, the corresponding monitoring grouping strategy is retrieved to perform detection grouping on the corresponding cables to be inspected to obtain the looseness monitoring group. The monitoring grouping strategy includes a collaborative grouping strategy and a separate grouping strategy.

[0018] Optionally, in a possible implementation of the first aspect, a corresponding monitoring grouping strategy is retrieved according to the relative position relationship to perform detection grouping on the corresponding cables to be inspected to obtain the looseness monitoring group, and the monitoring grouping strategy includes a collaborative grouping strategy and a separate grouping strategy, including:

[0019] Determine, based on the collaborative grouping strategy, that the cables to be inspected, which have a collaborative position relationship, are in the same looseness monitoring group;

[0020] According to the separate grouping strategy, the cables to be inspected whose relative position relationship is a separate position relationship and whose positions are adjacent to each other are determined to be the same looseness monitoring group.

[0021] Optionally, in a possible implementation manner of the first aspect, determining a secondary inspection path of the detection device based on the overhead image, and obtaining a comparison image group taken by the inspection device for the looseness monitoring group based on the secondary inspection path includes:

[0022] Obtain the midpoint of the cable segment corresponding to each of the cables to be inspected in the overhead image, connect the two ends of the cable segment to obtain a reference overhead line segment, and generate a secondary inspection path perpendicular to the reference overhead line segment with the midpoint of the segment as the starting point;

[0023] Controlling the detection device to fly based on the secondary inspection path, and obtaining the real-time cable contour in the detection picture of the detection device in real time;

[0024] When the real-time cable profile in the detection image includes two fixed endpoints, the detection device is controlled to perform image acquisition to obtain a comparison image corresponding to the cable to be inspected, and the comparison image group is obtained based on the comparison images of multiple cables to be inspected corresponding to the loose monitoring group.

[0025] Optionally, in a possible implementation of the first aspect, performing deformation analysis on each of the cables to be inspected in the loose monitoring group according to the comparison image group to obtain deformation judgment data corresponding to the loose monitoring group includes:

[0026] Extracting the cable contour corresponding to each contrast image in the contrast image group, and performing linear fitting processing on the cable contour to obtain a detection line segment;

[0027] Connecting the endpoints at both ends of the detection line segment to obtain a reference line segment, and determining an area formed by the reference line segment and the detection line segment as a detection area;

[0028] According to the cable data corresponding to each of the cables to be inspected in the loose monitoring group, the inspection area is divided into a plurality of sub-inspection areas;

[0029] Determine the detection serial number of each sub-detection area, arrange each sub-detection area according to the detection serial number to obtain a detection sequence, and obtain the deformation judgment data corresponding to the loose monitoring group based on the deformation comparison results corresponding to each detection group in the detection sequence.

[0030] Optionally, in a possible implementation of the first aspect, the detection area is divided into a plurality of sub-detection areas according to the cable data corresponding to each of the cables to be detected in the loose monitoring group, including:

[0031] The cable data is parsed to obtain the cable length corresponding to the cable to be inspected, the cable length is calculated based on the cable segmentation model to obtain the reference segmentation number corresponding to the cable length, and the reference segmentation number with the largest value is obtained as the detection segmentation number;

[0032] Obtaining a unit segmentation distance corresponding to each of the reference line segments according to a ratio of the line segment length of each of the reference line segments to the number of detection segments;

[0033] The endpoint of the reference line segment intersecting with the outline of the iron tower corresponding to the transmission iron tower is obtained as the detection starting point, the endpoint of the other end of the reference line segment is obtained as the detection end point, and the direction from the detection starting point to the detection end point is determined as the detection direction;

[0034] Starting from the detection starting point, a plurality of division points are determined in sequence at positions separated by a unit division distance in the reference line segment based on the detection direction;

[0035] A dividing line perpendicular to the reference line segment is generated at each of the dividing points, and the detection area is divided according to the dividing line to obtain a plurality of sub-detection areas.

[0036] Optionally, in a possible implementation manner of the first aspect, determining a detection sequence number of each of the sub-detection areas, arranging the sub-detection areas according to the detection sequence number to obtain a detection sequence, and obtaining deformation judgment data corresponding to the looseness monitoring group based on deformation comparison results corresponding to each detection group in the detection sequence, including:

[0037] Numbering the sub-detection areas from small to large according to the detection direction to obtain a detection sequence number of each sub-detection area;

[0038] Acquire the sub-detection areas with the same detection serial number as the same detection group, and arrange the detection groups from small to large according to the detection serial numbers to obtain a detection sequence;

[0039] sequentially determining the detection groups in the detection sequence as target groups, and obtaining the deformation direction and deformation span corresponding to each of the sub-detection areas in the target group;

[0040] Comparing the sub-detection areas based on the deformation direction, determining the target group with inconsistent deformation directions as an abnormal group, and stopping acquisition of the target group;

[0041] Obtain the deformation spans corresponding to the sub-detection areas with the same deformation direction for secondary comparison, determine that the target group whose span difference between the deformation spans is greater than or equal to the deformation span threshold is an abnormal group, and stop obtaining the target group;

[0042] It is determined that the to-be-inspected cable corresponding to the abnormal group is an abnormal cable, and deformation judgment data corresponding to the looseness monitoring group is obtained according to the abnormal cable.

[0043] Optionally, in a possible implementation manner of the first aspect, obtaining a deformation direction and a deformation span corresponding to each of the sub-detection areas in the target group includes:

[0044] Determine a direction perpendicular to the reference line segment as a target direction, and generate a plurality of deformation judgment lines in the target direction based on each line segment point in the reference line segment;

[0045] The point of each deformation judgment line intersecting with the reference line segment is obtained as the deformation starting point, and the point of each deformation judgment line intersecting with the detection line segment is obtained as the deformation end point, and the direction from the deformation starting point to the deformation end point is determined as the deformation direction, wherein the deformation direction of each deformation judgment line is consistent;

[0046] Determine the distance between the deformation starting point and the deformation end point in each deformation judgment line as the deformation distance;

[0047] According to the average value of the deformation distance of each deformation judgment segment, the deformation span corresponding to the corresponding sub-detection area is obtained.

[0048] Optionally, in a possible implementation manner of the first aspect, generating looseness monitoring data corresponding to the target transmission tower based on the deformation judgment data and sending the data to the management end includes:

[0049] Retrieving a transmission tower model corresponding to the target transmission tower, and determining a standard cable module corresponding to the abnormal cable in the transmission tower model;

[0050] Obtaining the number of display divisions of the cable length configuration of the abnormal cable, dividing the standard cable module and the detection line segment corresponding to the abnormal cable according to the number of display divisions, and obtaining a plurality of display segments corresponding to the standard cable module and sub-detection segments corresponding to the detection line segment;

[0051] Determine the deformation judgment lines corresponding to the two endpoints of each sub-detection segment as the target deformation line, obtain a conversion ratio according to the ratio between the line segment lengths of the display segment and the sub-detection segment, and obtain a display deformation distance based on the product of the deformation distance of the target deformation line and the conversion ratio;

[0052] Acquire an adjustment direction of the standard cable module corresponding to the deformation direction at a side viewing angle, move an endpoint corresponding to the display segment based on the adjustment direction and the display deformation distance, and update the display segment based on the two moved endpoints to obtain a sub-deformation segment;

[0053] A deformation cable module is obtained according to a plurality of deformation sub-segments, abnormal pixel values ​​are retrieved to update the deformation cable module to obtain a deformation display model, and looseness monitoring data is obtained according to the deformation display model and sent to a management end.

[0054] A second aspect of the present invention provides a transmission tower cable loosening detection device, comprising:

[0055] The inspection module is used to obtain an overhead image of the target transmission tower based on the primary inspection path of the detection equipment, and determine the looseness monitoring group according to the relative position relationship of each cable to be inspected in the overhead image;

[0056] An acquisition module, used to determine a secondary inspection path of the detection device based on the overhead image, and obtain a comparison image group taken by the inspection device on the looseness monitoring group based on the secondary inspection path;

[0057] An analysis module, used for performing deformation analysis on each of the cables to be inspected in the loose monitoring group according to the comparison image group, to obtain deformation judgment data corresponding to the loose monitoring group;

[0058] A display module is used to generate looseness monitoring data corresponding to the target transmission tower based on the deformation judgment data and send it to the management end.

[0059] The beneficial effects of the present invention are as follows:

[0060] The present invention can improve the accuracy and efficiency of loose cable detection in a transmission tower. When detecting cables in a transmission tower, the present invention will determine whether the cables are deformed in combination with the captured image data, and when the cables are deformed, the deformation data of the corresponding cables will be displayed through a model corresponding to the transmission tower, so that management personnel can intuitively view the deformation of the corresponding cables in combination with the model, so that cables with abnormal deformation can be processed in time to ensure the normal operation of the power system.

[0061] The present invention will first control the detection equipment to take an image of the transmission tower, and group the cables in the target transmission tower through the image taken once, to obtain a monitoring group for detecting the loose status of the cables, thereby improving the accuracy of looseness detection. Subsequently, the present invention will use the detection equipment to perform deformation analysis on the images taken twice for each cable in the monitoring group, to determine whether the cables corresponding to the monitoring group are loose, thereby improving the accuracy of detection. The above detection method can also improve the efficiency of detection.

[0062] In order to enable managers to intuitively view the specific situation of abnormal cables, the present invention also generates a corresponding display model and sends it to the managers, so that the managers can make targeted processing strategies in time based on the displayed abnormal data to ensure the normal operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 It is a flow chart of a method for detecting looseness of a transmission tower cable provided by an embodiment of the present invention;

[0064] Figure 2 is a schematic diagram of a cable with a coordinated position relationship provided by an embodiment of the present invention;

[0065] Figure 3 is a schematic diagram of a detection area provided by an embodiment of the present invention;

[0066] Figure 4 It is a structural schematic diagram of a transmission tower cable loosening detection device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0067] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0068] See also Figure 1 , is a flow chart of a method for detecting looseness of a transmission tower cable provided by an embodiment of the present invention, Figure 1 The execution subject of the method shown may be a software and / or hardware device. The execution subject of the present application may include but is not limited to at least one of the following: user equipment, network equipment, etc. Among them, user equipment may include but is not limited to computers, smart phones, personal digital assistants (PDA) and the electronic devices mentioned above. Network equipment may include but is not limited to a single network server, a server group consisting of multiple network servers, or a cloud based on cloud computing consisting of a large number of computers or network servers, wherein cloud computing is a type of distributed computing, a super virtual computer composed of a group of loosely coupled computers. This embodiment does not limit this. It includes steps S1 to S4, as follows:

[0069] S1, obtaining an overhead image of a target transmission tower based on a primary inspection path by a detection device, and determining a looseness monitoring group according to the relative position relationship of each cable to be inspected in the overhead image.

[0070] When inspecting the cables in the transmission tower, this solution will determine whether the cables are deformed based on the captured image data, and when the cables are deformed, the deformation data of the corresponding cables will be displayed through the model corresponding to the transmission tower, so that the management personnel can intuitively view the deformation of the corresponding cables based on the model, so that the cables with abnormal deformation can be handled in time to ensure the normal operation of the power system.

[0071] It is understandable that when the cable becomes loose, the structural balance state originally maintained by the cable will be broken, causing the cable to deform due to the loss of balance force. Therefore, the cable looseness detection can be carried out in combination with the deformation state of the cable.

[0072] Specifically, this solution will first control the detection equipment, such as a drone, to capture an image of the target transmission tower, i.e., the transmission tower currently being detected. The cables in the target transmission tower will be grouped through the image captured once to obtain a loose monitoring group, i.e., a group for detecting the loose status of the cables. Subsequently, the detection equipment will perform deformation analysis on the images captured for the second time for each cable in the loose monitoring group to determine whether the cables corresponding to the loose monitoring group have loose abnormalities.

[0073] Since the deformation state of the cable is closely related to the stress condition of the cable, when grouping, cables with similar stress conditions can be grouped into the same loose monitoring group. Specifically, the relative position relationship of each cable can be determined through the overhead image, and the stress condition of the cable can be analyzed through the relative position relationship, so that cables with similar stress conditions can be grouped into the same group for subsequent deformation analysis. Among them, the first-level inspection path refers to the path for inspecting multiple transmission towers, which can be pre-configured, and the cables to be inspected refer to the corresponding cables in the transmission tower currently being inspected.

[0074] In some embodiments, the solution in step S1 can be implemented by the following steps:

[0075] S11, determining the monitoring position point corresponding to the target transmission tower according to the primary inspection path, and obtaining the overhead image of the detection equipment based on the monitoring position point.

[0076] In actual applications, monitoring location points corresponding to each transmission tower can be configured in the primary inspection path, so that the inspection equipment can go to each monitoring location point based on the primary inspection path to collect images of the corresponding transmission tower.

[0077] The height and other data of the monitoring position corresponding to the target transmission tower can be configured in advance. After the detection device arrives at the monitoring position, it can collect the overhead image according to the configured posture to obtain the overhead image. When collecting the overhead image, the detection device can make the overhead outline of the target transmission tower located at the center of the overhead image.

[0078] S12, extracting the cable contours corresponding to the cables to be inspected and the tower contours corresponding to the target transmission tower in the overhead image.

[0079] It can be understood that the connection position of each cable in the transmission tower can be determined through the overhead image, and thus the relative position relationship between each cable can be determined through the connection position of each cable and the transmission tower. Therefore, after obtaining the overhead image, the cable contour and tower contour in the overhead image can be extracted, and the connection position of the cable in the transmission tower can be determined by extracting the contour data.

[0080] S13, performing linear fitting processing on the cable contour to obtain a cable segment corresponding to the cable to be inspected, and determining an end point of the cable segment intersecting with the tower contour as a fixed starting point.

[0081] It is understandable that since the thickness of the cable may be different, the width of the obtained cable profile may also be different. The cable profile is generally linear, so the cable profile can be linearly fitted to obtain the cable line segments corresponding to its profile. The shape, length and other information of the cable profile can be displayed through the cable line segments, thereby improving the accuracy of detection and analysis.

[0082] Specifically, the contour lines on both sides of the cable contour can be fitted. The outer contour of the cable contour can be obtained first, the tangent direction of each contour point in the outer contour can be determined, and a fitting line segment perpendicular to the tangent direction can be generated. Two contour points with the same fitting line segment can be determined as a fitting group, and then the point located between the two contour points in the fitting line segment corresponding to each fitting group can be determined as a fitting point, and the cable segment can be obtained through multiple fitting points. It can be understood that two contour points with the same fitting line segment are likely to be located on both sides of the cable contour. For example, when the cable contour is straight, the contour lines on both sides are also straight and parallel to each other. Therefore, two points with the same tangent direction and the same fitting line segment are likely to be located on both sides of the cable contour. The cable contour can be fitted through the center point between multiple points on both sides of the contour to obtain the cable segment.

[0083] Since both ends of the cable are generally connected to the transmission tower and the ground, when determining the position of the cable in the transmission tower, it can be determined by the endpoint where the cable line segment intersects with the tower outline.

[0084] S14, obtaining the interval distances between the fixed starting points of the cable segments, and determining that the relative position relationship between the cables to be inspected whose interval distances are less than or equal to the joint distance threshold is a coordinated position relationship.

[0085] In the design of transmission towers, in order to ensure the stability and safety of transmission towers, it is usually required that the forces between multiple cables corresponding to the same joint are similar, so that the transmission tower can be balanced. Therefore, when grouping multiple cables, multiple cables corresponding to the same joint can be divided into the same group. Among them, the joint is a key component that connects the cable with other components such as towers, ground anchors, etc.

[0086] See also Figure 2 , which is a schematic diagram of a cable with a coordinated position relationship provided by an embodiment of the present invention, from Figure 2It can be seen that when multiple cables correspond to the same joint, the distance between their end points on the tower is close. Therefore, the interval distance between the fixed starting points of the cable segments can be used to determine whether they correspond to the same joint, and the relative position relationship between the cables corresponding to the same joint can be determined as a coordinated position relationship.

[0087] The joint distance threshold refers to a pre-configured distance threshold used to determine whether the cables correspond to the same joint. If the interval distance is less than or equal to the threshold, it means that the distance between the corresponding cables is very close and they may correspond to the same joint. Therefore, their corresponding relative position relationship can be determined as a collaborative position relationship.

[0088] S15, determining that the relative position relationship between the cables to be inspected whose interval distance is greater than the joint distance threshold is a separate position relationship.

[0089] If the interval distance is greater than the joint distance threshold, it means that the distance between the corresponding cables is not as close as when they are located at the same joint. They may correspond to different joints. Therefore, their corresponding relative position relationship can be determined as a separate position relationship, that is, not the corresponding position relationship when they are located at the same joint.

[0090] S16, according to the relative position relationship, a corresponding monitoring grouping strategy is retrieved to perform detection grouping on the corresponding cables to be inspected to obtain the looseness monitoring group, wherein the monitoring grouping strategy includes a collaborative grouping strategy and a separate grouping strategy.

[0091] In order to improve the accuracy of detection, when performing detection grouping, the cables can be grouped in a targeted manner according to their relative positional relationships. Specifically, different monitoring grouping strategies can be used to perform detection grouping in different ways.

[0092] The collaborative grouping strategy refers to a strategy for grouping cables with collaborative position relationships, and the individual grouping strategy refers to a strategy for grouping cables with individual position relationships.

[0093] In some embodiments, the looseness monitoring group can be obtained by:

[0094] S161, determining, based on the collaborative grouping strategy, that the cables to be inspected whose relative position relationship is a collaborative position relationship are in the same looseness monitoring group.

[0095] It can be understood that, since the cables in a coordinated position relationship all correspond to the same joint, their corresponding stress conditions are similar, so they can be classified into the same looseness monitoring group.

[0096] S162: Determine, according to the separate grouping strategy, that the cables to be inspected, whose relative position relationship is a separate position relationship and whose positions are adjacent, are the same looseness monitoring group.

[0097] For cables with a single position relationship, they can be classified into the same loose monitoring group with adjacent cables. It can be understood that the cable system of the transmission tower is a whole, and each cable jointly bears the load of the transmission tower. Under the action of the load, the adjacent cables will cooperate with each other and share the force, thereby maintaining similar force conditions. Therefore, for cables with a single position relationship, they can be classified into the same loose monitoring group with adjacent cables.

[0098] Through the above method, cables with similar stress conditions can be quickly grouped to improve the efficiency and accuracy of data processing.

[0099] S2, determining a secondary inspection path of the detection device based on the overhead image, and obtaining a comparison image group taken by the inspection device on the looseness monitoring group based on the secondary inspection path.

[0100] After the cables are grouped through the overhead image, the inspection equipment can be controlled to take the side image of each cable, and the deformation state of each cable can be determined through the side image. Specifically, the inspection equipment can be controlled to take the side image of each cable based on the secondary inspection path.

[0101] The secondary inspection path refers to the path taken by the inspection equipment when taking side images of each cable, and the comparison image group refers to an image group composed of side images of each cable in the looseness monitoring group.

[0102] Specifically, step S2 can be implemented by the following steps, which are as follows:

[0103] S21, obtaining the midpoint of the cable segment corresponding to each of the cables to be inspected in the overhead image, connecting the two ends of the cable segment to obtain a reference overhead line segment, and generating a secondary inspection path perpendicular to the reference overhead line segment with the midpoint of the line segment as the starting point.

[0104] In order to be able to control the inspection equipment to go to the side of the cable to take images, a secondary inspection path perpendicular to the reference overhead line of sight can be generated. The direction corresponding to this path is the side direction of the cable. The inspection equipment is controlled to fly based on this path, so that the inspection equipment can take side images of the cable.

[0105] It can be understood that since the cable segment corresponds to the line segment image of the cable at a top-down angle, drawing a perpendicular line through the center point of the segment can ensure that the position offset of the inspection equipment when taking the side image of the cable will not be too large, so that the captured cable image can be located at the center of the shooting screen. The reference top-down line segment is a line segment used to determine the extension direction of the cable, and the direction perpendicular to the line segment direction is the direction corresponding to the side of the cable.

[0106] In actual applications, the shooting height of the inspection equipment when flying based on the secondary inspection path can be pre-configured, which is different from the height when shooting from a bird's-eye view. In order to improve the integrity of data collection, the height of the inspection equipment when shooting from the side can be lower than the height when shooting from a bird's-eye view. When shooting from the side, the angle of the shooting lens can be adjusted accordingly so that the direction of the lens can be directed toward the location of the tower, so that the transmission tower and the cable can be located in the shooting picture.

[0107] S22, controlling the detection device to fly based on the secondary inspection path, and obtaining the real-time cable contour in the detection picture of the detection device in real time.

[0108] It is understandable that since the shooting distance between the inspection equipment and the transmission tower changes, when the shooting distance is too close, the complete outline of the cable may not be captured. Therefore, in order to improve the accuracy of data collection, the real-time cable outline corresponding to the cable in the shooting picture, that is, the detection picture, can be obtained in real time.

[0109] S23, when the real-time cable profile in the detection image includes two fixed endpoints, control the detection device to perform image acquisition to obtain a comparison image corresponding to the cable to be detected, and obtain the comparison image group based on the comparison images of multiple cables to be detected corresponding to the loose monitoring group.

[0110] Among them, the fixed end points refer to the end points where the cable is connected to the tower and the ground. When the real-time cable contour captured is connected to the tower and the ground respectively and the contour is continuous and complete, it can be determined that the real-time cable contour in the detection picture includes two fixed end points. At this time, the detection equipment can be controlled to capture images to obtain a comparison image, that is, a complete image taken from the side of the cable, so that a comparison image group can be obtained by combining the comparison images of multiple cables to be inspected corresponding to the loose monitoring group.

[0111] Through the above method, the accuracy of the inspection equipment when collecting images can be improved.

[0112] S3, performing deformation analysis on each of the cables to be inspected in the looseness monitoring group according to the comparison image group, to obtain deformation judgment data corresponding to the looseness monitoring group.

[0113] It is understandable that since the stress conditions between the cables in the loose monitoring group are similar, the deformation degree between the cables may also be similar. If the deformation degree difference between the cables in the loose monitoring group is too large, it means that there may be abnormal cables. By performing deformation analysis on each cable, the abnormal cables can be quickly identified to improve the accuracy of detection. Among them, the deformation judgment data refers to the data obtained by comparing the deformation data of the cable through the comparison image. Specifically, this scheme will compare and analyze the deformation conditions of each cable in the loose monitoring group through the deformation direction of each cable and the deformation span in the deformation direction.

[0114] Based on the above embodiment, the specific implementation of step S3 may be:

[0115] S31, extracting the cable contour corresponding to each contrast image in the contrast image group, and performing linear fitting processing on the cable contour to obtain a detection line segment.

[0116] The above method of obtaining the detection line segment is similar to the method of obtaining the cable line segment in step S13 (performing linear fitting processing on the cable contour to obtain the cable line segment corresponding to the cable to be detected, and determining the end point of the cable line segment intersecting with the tower contour as the fixed starting point), and will not be repeated here.

[0117] S32, connecting the endpoints of both ends of the detection line segment to obtain a reference line segment, and determining an area formed by the reference line segment and the detection line segment as a detection area.

[0118] See also Figure 3 , is a schematic diagram of a detection area provided in an embodiment of the present invention. It can be understood that in order to determine the deformation curvature of the cable, a straight line connecting the two ends of the detection line segment can be generated first, and the shape of the cable in a stretched state can be determined by the straight line. When the cable is not in a stretched state, it may have a certain curvature, so the corresponding detection line segment may also have a certain curvature, for example Figure 3 As shown, the two endpoints of the detection line segment and the reference line segment are the same. Therefore, when the detection line segment has a certain curvature, it can enclose a corresponding area with the reference line segment, that is, the above-mentioned detection area. The deformation direction and deformation span of the detection line segment relative to the reference line segment can be determined subsequently through the detection area.

[0119] S33, dividing the detection area into a plurality of sub-detection areas according to the cable data corresponding to each of the cables to be detected in the loose monitoring group.

[0120] Cable data refers to the length data of the cable to be tested. It is understandable that the lengths corresponding to different cables may be different, and the length of the cable will affect the stress and deformation state of the cable. Therefore, in order to improve the accuracy of deformation comparison, the cable length data can be combined to perform segmented deformation comparison on the cable, so as to more accurately capture the deformation differences of the cable in different positions.

[0121] A sub-detection area refers to a plurality of sub-areas obtained by dividing the detection area in combination with the segmented data of the cable. Since the detection area and the cable correspond to each other, after the detection area is divided, each sub-detection area will correspond to the corresponding cable segment. By determining the abnormal sub-detection area, the specific position of the cable segment corresponding to the abnormal area can be obtained.

[0122] Step S33 includes steps S331 to S335, which are specifically as follows:

[0123] S331, parsing the cable data to obtain the cable length corresponding to the cable to be inspected, calculating the cable length based on a cable segmentation model to obtain a reference segmentation number corresponding to the cable length, and obtaining the reference segmentation number with the largest value as the detection segmentation number.

[0124] The cable segmentation model refers to a model that can determine the number of cable segments based on the length data of the cable. The model can be pre-trained. In order to improve the accuracy of comparison, the number of segments corresponding to different cable lengths may be different. For example, the longer the cable length, the more corresponding segmentations may be, so that the cable length can be combined for targeted division and comparison.

[0125] Since the loose monitoring group includes multiple cables, and the number of reference divisions corresponding to each cable may be different, in order to improve the accuracy of the comparison, the reference division number with the largest value can be selected as the number of final divisions of each cable in the loose monitoring group, that is, the above-mentioned detection division number. It can be understood that the reason why the number of divisions corresponding to each cable in the loose monitoring group is the same is so that the cable deformation data at the same position in each cable can be compared later, so that the abnormal cable segment can be accurately located to improve the accuracy of the detection.

[0126] S332: Obtain a unit segmentation distance corresponding to each of the reference line segments according to a ratio of the line segment length of each of the reference line segments to the number of detected segments.

[0127] When dividing the detection area, this scheme will generate multiple equally spaced dividing lines on the reference line segment to divide the detection area, so that the dividing distances of the detection area in the straight direction corresponding to the reference line segment can be the same. Specifically, the spacing distance between each dividing line can be determined by the unit division distance.

[0128] S333, obtaining the endpoint of the reference line segment that intersects with the tower contour corresponding to the transmission tower as the detection starting point, the endpoint of the other end of the reference line segment as the detection end point, and determining the direction from the detection starting point to the detection end point as the detection direction.

[0129] It can be understood that the reason for determining the detection direction is to locate the dividing points corresponding to multiple dividing lines in combination with the detection direction, so that corresponding dividing lines can be generated at the corresponding positions of the reference line segments, and subsequently, the deformation anomalies at the same positions of each cable can be detected in turn according to the detection direction, so as to determine the specific cable segments where deformation anomalies occur in each cable.

[0130] S334, starting from the detection starting point, determine a plurality of division points in the reference line segment at positions separated by a unit division distance based on the detection direction.

[0131] Specifically, we can first determine the position point in the reference line segment that is at a unit division distance from the detection starting point in the detection direction as the first division point, and then determine the position point at a unit division distance from the division point in the detection direction as the next division point, and so on, until the last division point coincides with the detection end point and stops determining the division points.

[0132] S335 , generating a division line perpendicular to the reference line segment at each of the division points, and dividing the detection area according to the division line to obtain a plurality of sub-detection areas.

[0133] Each sub-detection area divided in the above manner has a corresponding cable segment. Specifically, the corresponding cable segment can be determined by the sub-segment corresponding to the detection line segment in each detection area.

[0134] S34, determining the detection serial number of each of the sub-detection areas, arranging the sub-detection areas according to the detection serial number to obtain a detection sequence, and obtaining deformation judgment data corresponding to the looseness monitoring group based on deformation comparison results corresponding to each detection group in the detection sequence.

[0135] When performing deformation analysis on multiple sub-detection areas corresponding to each cable in the loose monitoring group, deformation comparison can be performed on multiple sub-detection areas with the same position in turn. Specifically, each sub-detection area can be numbered first, and then the sub-detection areas with the same position can be determined as the same detection group based on the number, and each detection group can be arranged according to the number to obtain a detection sequence, and deformation analysis can be performed on each detection group in turn through the detection sequence.

[0136] The deformation judgment data refers to the judgment data obtained after performing deformation anomaly analysis on each cable in the loose monitoring group according to the detection sequence.

[0137] Based on the above embodiment, the specific implementation of step S34 may be:

[0138] S341, numbering the sub-detection areas from small to large according to the detection direction to obtain a detection sequence number of each sub-detection area.

[0139] It is worth mentioning that the numbering sequence of the multiple sub-detection areas corresponding to each cable is the same, for example, they can all be numbered in the order of 123..., so that the positions of the cable sections corresponding to the sub-detection areas with the same number can be the same.

[0140] S342, acquiring the sub-detection areas with the same detection serial number as the same detection group, and arranging the detection groups from small to large according to the detection serial numbers to obtain a detection sequence.

[0141] The same detection serial numbers indicate that the corresponding sub-detection areas may correspond to the same cable sections. For example, when the detection serial number of a sub-detection area is 1, it may correspond to the first cable section close to the transmission tower. Therefore, the sub-detection areas with the same detection serial numbers can be regarded as the same detection group.

[0142] When performing deformation analysis on each detection group, this solution compares each detection group in combination with the detection direction, and the detection sequence number and the detection direction correspond to each other, so each detection group can be arranged according to the detection sequence number to obtain a detection sequence.

[0143] S343, sequentially determining the detection groups in the detection sequence as target groups, and obtaining the deformation direction and deformation span corresponding to each of the sub-detection areas in the target group.

[0144] It is understandable that under similar stress conditions, the deformation directions and degrees of each cable may be relatively close. If the deformation directions and degrees of each cable are very different, it means that there may be abnormal cables. The corresponding cable data can be displayed to management personnel so that they can make targeted solutions in time to ensure the normal operation of the power grid system. Among them, the deformation span refers to the span of the cable in the deformation direction relative to the straight state.

[0145] In some embodiments, the deformation direction and deformation span can be obtained by the following steps:

[0146] S3431, determining a direction perpendicular to the reference line segment as a target direction, and generating a plurality of deformation judgment lines in the target direction based on each line segment point in the reference line segment.

[0147] Since the reference line segment corresponds to the reference line in the stretched state, in order to determine the deformation span of the detection line segment relative to the stretched state, multiple deformation judgment lines can be generated in a direction perpendicular to the reference line segment, and the deformation direction and deformation span of the detection line segment can be determined through the deformation judgment lines. It can be understood that since the reference line segment and the detection line segment in the sub-detection area correspond to each other, in order to determine the deformation data between the reference line segment and the detection line segment, multiple deformation judgment lines passing through the reference line segment and the detection line segment can be generated, and the deformation direction and deformation span of the detection line segment relative to the reference line segment can be determined through the intersection of the deformation judgment lines with the reference line segment and the detection line segment.

[0148] S3432, obtaining the point of each deformation judgment line that intersects with the reference line segment as the deformation starting point, and the point of each deformation judgment line that intersects with the detection line segment as the deformation end point, and determining the direction from the deformation starting point to the deformation end point as the deformation direction, wherein the deformation direction of each deformation judgment line is consistent.

[0149] It can be understood that the deformation direction is generally consistent with the force direction. The force direction of the same cable section is usually the same, so the direction of deformation will also be consistent. Therefore, the deformation direction of each deformation judgment line is consistent. The deformation direction of the cable relative to the stretched state can be determined from the deformation starting point to the deformation end point.

[0150] S3433: Determine the distance between the deformation starting point and the deformation end point in each deformation judgment line as the deformation distance.

[0151] In practical applications, since the detection line segment may have a certain curvature, the deformation span of each position point in the detection line segment and the reference line segment may be different. The distance between the deformation start point and the deformation end point in the deformation judgment line can be used to obtain the deformation distance of the corresponding position point in the detection line segment relative to the reference line segment.

[0152] S3434: Obtain a deformation span corresponding to the corresponding sub-detection area according to the average value of the deformation distance of each deformation judgment segment.

[0153] It is understandable that since a sub-detection area may correspond to multiple deformation distances, in order to obtain the deformation span of the cable segment corresponding to the corresponding sub-detection area, it can be determined by the average of the multiple deformation distances corresponding to the sub-detection area, thereby improving the accuracy of deformation detection.

[0154] S344: Compare the sub-detection areas based on the deformation direction, determine that the target group with inconsistent deformation direction is an abnormal group, and stop acquiring the target group.

[0155] It is understandable that the force directions of each cable in the same loose monitoring group are generally consistent. Therefore, when the deformation directions are inconsistent, it indicates that there may be problematic cables. In this case, the target group can be determined as an abnormal group, and the specific location area where the abnormality exists can be determined through the abnormal group. And because the abnormal cable has been identified at this time, the subsequent deformation comparison analysis can be stopped, thereby reducing the amount of data processing and improving detection efficiency.

[0156] S345, obtaining the deformation spans corresponding to the sub-detection areas with the same deformation direction for secondary comparison, determining that the target group whose span difference between the deformation spans is greater than or equal to the deformation span threshold is an abnormal group, and stopping the acquisition of the target group.

[0157] When the deformation directions are consistent, it means that the force directions of each cable are consistent. In this case, the deformation spans of the corresponding cable segments can be compared for the second time. If the difference in the deformation spans between the corresponding cable segments is too large, it means that the deformation degrees of the corresponding cable segments may differ greatly. In this case, the corresponding cables may also be abnormal. Therefore, the corresponding target group can be identified as an abnormal group.

[0158] The deformation span threshold refers to a threshold used to determine whether the deformation degrees between the cable segments differ too much. If the threshold is greater than or equal to the threshold, it means that the deformation distance difference between the corresponding cable segments may be large, and the corresponding deformation degrees may also differ greatly.

[0159] S346, determining that the to-be-inspected cable corresponding to the abnormal group is an abnormal cable, and obtaining deformation judgment data corresponding to the looseness monitoring group according to the abnormal cable.

[0160] The cables to be inspected corresponding to the abnormal group are all the cables corresponding to the loose monitoring group. When an abnormal group exists, multiple cables corresponding to the loose monitoring group may be abnormal. Therefore, the corresponding cables can be regarded as abnormal cables, and deformation judgment data can be obtained based on this.

[0161] Through the above method, the accuracy and efficiency of detection can be improved.

[0162] S4, generating looseness monitoring data corresponding to the target transmission tower based on the deformation judgment data and sending it to the management end.

[0163] Specifically, in order to enable the management personnel to intuitively view the specific situation of the abnormal cable, a corresponding display model can be generated based on the deformation judgment data and sent to the management personnel. Among them, the loose monitoring data refers to the data corresponding to the display model after the virtual model corresponding to the target transmission tower is abnormally updated based on the abnormal cable.

[0164] Based on the above embodiment, the specific implementation of step S4 may be:

[0165] S41, calling a transmission tower model corresponding to the target transmission tower, and determining a standard cable module corresponding to the abnormal cable in the transmission tower model.

[0166] In practical applications, the transmission tower model can be a virtual model corresponding to the target transmission tower, which can be configured in advance. The standard cable module refers to a virtual model corresponding to the cable in a normal state, for example, it can be a cable model in a stretched state. Each cable can be configured with a corresponding standard cable module.

[0167] S42, obtaining the number of display divisions of the cable length configuration of the abnormal cable, dividing the standard cable module and the detection line segment corresponding to the abnormal cable according to the number of display divisions, and obtaining multiple display segments corresponding to the standard cable module and sub-detection segments corresponding to the detection line segment.

[0168] It is understandable that in order to make the displayed cable model adapt to the actual deformation of the abnormal cable, the standard cable module can be adjusted accordingly based on the deformation data of the abnormal cable. Specifically, when making adjustments, the standard cable module can be segmented first, and then adjusted according to the corresponding sub-segments in the detection segment. Since the lengths of the cables may be different, in order to improve the accuracy of the display adjustment, different display division numbers can be configured for them in combination with the cable length. For example, the longer the cable length, the more corresponding display division numbers can be.

[0169] Among them, the number of display divisions refers to the number of divisions of the standard cable module, and the standard cable module can be divided into multiple display segments according to this number. Since the deformation conditions at different positions in the detection segment may be different, the standard cable module is refined. The display segment can be adjusted based on the deformation data of the sub-detection segment corresponding to each display segment in the detection segment, so that the adjusted standard cable module can be closer to the actual deformation condition of the abnormal cable.

[0170] S43, determining the deformation judgment lines corresponding to the two endpoints of each sub-detection segment as the target deformation line, obtaining a conversion ratio according to the ratio between the line segment lengths of the display segment and the sub-detection segment, and obtaining a display deformation distance based on the product of the deformation distance of the target deformation line and the conversion ratio.

[0171] It is understandable that, in order to make the deformation of the display segment correspond to its corresponding sub-detection segment, the deformation span of the display segment can be adjusted accordingly by the deformation span of the two ends of the sub-detection segment in the deformation direction. Since the length between the display segment and the sub-detection segment may not correspond one to one, the deformation distance corresponding to the two ends of the sub-detection segment can be converted before adjustment. In practical applications, the ratio of the length of the display segment and the sub-detection segment corresponds to the ratio of the span of the display segment and the span of the sub-detection segment. Therefore, the display deformation distance corresponding to the corresponding end point of the display segment can be obtained according to the product of the deformation distance and the ratio of the length of the display segment and the sub-detection segment.

[0172] The display deformation distance refers to the adjustment distance of the corresponding end points of the display segment in the direction of deformation, through which the two ends of the display segment can be adjusted to the corresponding deformation span, so that the deformation of the adjusted display segment can be similar to that of the sub-detection segment.

[0173] S44, obtaining an adjustment direction of the standard cable module corresponding to the deformation direction in a side view, moving an endpoint corresponding to the display segment based on the adjustment direction and the display deformation distance, and updating the display segment based on the two moved endpoints to obtain a sub-deformation segment.

[0174] It can be understood that since the detection line segment is an image captured at a side perspective, when adjusting the standard cable module, it can also be adjusted to a side perspective, and then the standard cable module at the side perspective can be deformed accordingly. When the standard cable module is a cable model in a stretched state, the adjustment direction can be a direction perpendicular to the standard cable module, and this direction corresponds to the deformation direction. For example, when the deformation direction is the direction in which the cable is concave inward, the adjustment direction is also the direction in which the inward concave is pointing.

[0175] When the display segment is deformed, the endpoints at both ends of the display segment can be moved in the adjustment direction by the corresponding display deformation distance and then stopped, and a new display segment can be regenerated based on the updated endpoints after movement. Specifically, a new cable model segment can be regenerated based on the updated endpoints.

[0176] It is worth mentioning that adjacent display segments may have overlapping endpoints. For example, the endpoint at the end of the previous display segment may correspond to the endpoint at the beginning of the next display segment, so that the multiple sub-deformation segments obtained can be continuous. The sub-deformation segment refers to the cable model segment after deformation adjustment.

[0177] S45, obtaining a deformation cable module according to the multiple deformation sub-segments, retrieving abnormal pixel values ​​to update the deformation cable module to obtain a deformation display model, and obtaining looseness monitoring data according to the deformation display model and sending the data to the management end.

[0178] In practical applications, after obtaining the deformable cable module, the corresponding standard cable module can be deleted. The abnormal pixel value refers to the pixel value for abnormal display of the cable, for example, it can be a red pixel value. The deformation display model refers to the model for abnormal display of the cable.

[0179] Through the above method, the deformation of the abnormal cable can be intuitively displayed, so that the management personnel can make targeted processing strategies in time based on the displayed abnormal data.

[0180] See also Figure 4 , is a schematic structural diagram of a transmission tower cable loosening detection device provided by an embodiment of the present invention, the transmission tower cable loosening detection device comprising:

[0181] The inspection module is used to obtain an overhead image of the target transmission tower based on the primary inspection path of the detection equipment, and determine the looseness monitoring group according to the relative position relationship of each cable to be inspected in the overhead image;

[0182] An acquisition module, used to determine a secondary inspection path of the detection device based on the overhead image, and obtain a comparison image group taken by the inspection device on the looseness monitoring group based on the secondary inspection path;

[0183] An analysis module, used for performing deformation analysis on each of the cables to be inspected in the loose monitoring group according to the comparison image group, to obtain deformation judgment data corresponding to the loose monitoring group;

[0184] A display module is used to generate looseness monitoring data corresponding to the target transmission tower based on the deformation judgment data and send it to the management end.

[0185] Figure 4 The apparatus of the embodiment shown can be used to perform Figure 1 The implementation principles and technical effects of the steps in the method embodiment shown are similar and will not be repeated here.

[0186] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for detecting looseness of a transmission tower cable, characterized in that: include: Obtain an overhead image of the target transmission tower taken by the detection equipment based on the primary inspection path, and determine a looseness monitoring group according to the relative position relationship of each cable to be inspected in the overhead image; Determine a secondary inspection path of the detection device based on the overhead image, and obtain a comparison image group taken by the detection device on the looseness monitoring group based on the secondary inspection path; Performing deformation analysis on each of the cables to be inspected in the looseness monitoring group according to the comparison image group to obtain deformation judgment data corresponding to the looseness monitoring group; Generate looseness monitoring data corresponding to the target transmission tower based on the deformation judgment data and send it to the management end; Obtaining an overhead image of the target transmission tower based on the primary inspection path of the detection equipment, and determining the looseness monitoring group according to the relative position relationship of each cable to be inspected in the overhead image, including: Determine the monitoring position point corresponding to the target transmission tower according to the primary inspection path, and obtain the overhead image of the detection device based on the monitoring position point; Extracting the cable contours corresponding to the cables to be inspected and the tower contours corresponding to the target transmission tower in the overhead image; Performing linear fitting processing on the cable contour to obtain a cable segment corresponding to the cable to be inspected, and determining an end point of the cable segment that intersects with the tower contour as a fixed starting point; Obtaining the interval distance between the fixed starting points of each of the cable segments, and determining that the relative position relationship between the cables to be inspected whose interval distance is less than or equal to the joint distance threshold is a coordinated position relationship; Determine that the relative position relationship between the cables to be inspected whose interval distance is greater than the joint distance threshold is a separate position relationship; According to the relative position relationship, the corresponding monitoring grouping strategy is retrieved to perform detection grouping on the corresponding cables to be inspected to obtain the looseness monitoring group. The monitoring grouping strategy includes a collaborative grouping strategy and a separate grouping strategy.

2. The method according to claim 1, characterized in that: According to the relative position relationship, the corresponding monitoring grouping strategy is retrieved to perform detection grouping on the corresponding cables to be inspected, so as to obtain the looseness monitoring group. The monitoring grouping strategy includes a collaborative grouping strategy and a separate grouping strategy, including: Determine, based on the collaborative grouping strategy, that the cables to be inspected, which have a collaborative position relationship, are in the same looseness monitoring group; According to the separate grouping strategy, the cables to be inspected whose relative position relationship is a separate position relationship and whose positions are adjacent to each other are determined to be the same looseness monitoring group.

3. The method according to claim 1, characterized in that Determining a secondary inspection path of the detection device based on the overhead image, and obtaining a comparison image group taken by the detection device based on the secondary inspection path for the looseness monitoring group, including: Obtain the midpoint of the cable segment corresponding to each of the cables to be inspected in the overhead image, connect the two ends of the cable segment to obtain a reference overhead line segment, and generate a secondary inspection path perpendicular to the reference overhead line segment with the midpoint of the segment as the starting point; Controlling the detection device to fly based on the secondary inspection path, and obtaining the real-time cable contour in the detection picture of the detection device in real time; When the real-time cable profile in the detection image includes two fixed endpoints, the detection device is controlled to perform image acquisition to obtain a comparison image corresponding to the cable to be inspected, and the comparison image group is obtained based on the comparison images of multiple cables to be inspected corresponding to the loose monitoring group.

4. The method according to claim 1, characterized in that Performing deformation analysis on each of the cables to be inspected in the loose monitoring group according to the comparison image group to obtain deformation judgment data corresponding to the loose monitoring group includes: Extracting the cable contour corresponding to each contrast image in the contrast image group, and performing linear fitting processing on the cable contour to obtain a detection line segment; Connecting the endpoints at both ends of the detection line segment to obtain a reference line segment, and determining an area formed by the reference line segment and the detection line segment as a detection area; According to the cable data corresponding to each of the cables to be inspected in the loose monitoring group, the inspection area is divided into a plurality of sub-inspection areas; Determine the detection serial number of each sub-detection area, arrange each sub-detection area according to the detection serial number to obtain a detection sequence, and obtain the deformation judgment data corresponding to the loose monitoring group based on the deformation comparison results corresponding to each detection group in the detection sequence.

5. The method according to claim 4, characterized in that According to the cable data corresponding to each cable to be inspected in the loose monitoring group, the inspection area is divided into a plurality of sub-inspection areas, including: The cable data is parsed to obtain the cable length corresponding to the cable to be inspected, the cable length is calculated based on the cable segmentation model to obtain the reference segmentation number corresponding to the cable length, and the reference segmentation number with the largest value is obtained as the detection segmentation number; Obtaining a unit segmentation distance corresponding to each of the reference line segments according to a ratio of the line segment length of each of the reference line segments to the number of detection segments; The endpoint of the reference line segment intersecting with the outline of the iron tower corresponding to the transmission iron tower is obtained as the detection starting point, the endpoint of the other end of the reference line segment is obtained as the detection end point, and the direction from the detection starting point to the detection end point is determined as the detection direction; Starting from the detection starting point, a plurality of division points are determined in sequence at positions separated by a unit division distance in the reference line segment based on the detection direction; A dividing line perpendicular to the reference line segment is generated at each of the dividing points, and the detection area is divided according to the dividing line to obtain a plurality of sub-detection areas.

6. The method according to claim 5, characterized in that Determine the detection sequence number of each sub-detection area, arrange each sub-detection area according to the detection sequence number to obtain a detection sequence, and obtain deformation judgment data corresponding to the loose monitoring group based on the deformation comparison results corresponding to each detection group in the detection sequence, including: Numbering the sub-detection areas from small to large according to the detection direction to obtain a detection sequence number of each sub-detection area; Acquire the sub-detection areas with the same detection serial number as the same detection group, and arrange the detection groups from small to large according to the detection serial numbers to obtain a detection sequence; sequentially determining the detection groups in the detection sequence as target groups, and obtaining the deformation direction and deformation span corresponding to each of the sub-detection areas in the target group; Comparing the sub-detection areas based on the deformation direction, determining the target group with inconsistent deformation directions as an abnormal group, and stopping acquisition of the target group; Obtain the deformation spans corresponding to the sub-detection areas with the same deformation direction for secondary comparison, determine that the target group whose span difference between the deformation spans is greater than or equal to the deformation span threshold is an abnormal group, and stop obtaining the target group; It is determined that the to-be-inspected cable corresponding to the abnormal group is an abnormal cable, and deformation judgment data corresponding to the looseness monitoring group is obtained according to the abnormal cable.

7. The method according to claim 6, characterized in that Obtaining the deformation direction and deformation span corresponding to each of the sub-detection areas in the target group includes: Determine a direction perpendicular to the reference line segment as a target direction, and generate a plurality of deformation judgment lines in the target direction based on each line segment point in the reference line segment; The point of each deformation judgment line intersecting with the reference line segment is obtained as the deformation starting point, and the point of each deformation judgment line intersecting with the detection line segment is obtained as the deformation end point, and the direction from the deformation starting point to the deformation end point is determined as the deformation direction, wherein the deformation direction of each deformation judgment line is consistent; Determine the distance between the deformation starting point and the deformation end point in each deformation judgment line as the deformation distance; According to the average value of the deformation distance of each deformation judgment line, the deformation span corresponding to the corresponding sub-detection area is obtained.

8. The method according to claim 7, characterized in that Generating looseness monitoring data corresponding to the target transmission tower based on the deformation judgment data and sending it to the management end includes: Retrieving a transmission tower model corresponding to the target transmission tower, and determining a standard cable module corresponding to the abnormal cable in the transmission tower model; Obtaining the number of display divisions of the cable length configuration of the abnormal cable, dividing the standard cable module and the detection line segment corresponding to the abnormal cable according to the number of display divisions, and obtaining a plurality of display segments corresponding to the standard cable module and sub-detection segments corresponding to the detection line segment; Determine the deformation judgment lines corresponding to the two endpoints of each sub-detection segment as the target deformation line, obtain a conversion ratio according to the ratio between the line segment lengths of the display segment and the sub-detection segment, and obtain a display deformation distance based on the product of the deformation distance of the target deformation line and the conversion ratio; Acquire an adjustment direction of the standard cable module corresponding to the deformation direction at a side viewing angle, move an endpoint corresponding to the display segment based on the adjustment direction and the display deformation distance, and update the display segment based on the two moved endpoints to obtain a sub-deformation segment; A deformation cable module is obtained according to a plurality of deformation sub-segments, abnormal pixel values ​​are retrieved to update the deformation cable module to obtain a deformation display model, and looseness monitoring data is obtained according to the deformation display model and sent to a management end.

9. A detection device for the transmission tower cable loosening detection method according to claim 1, characterized in that: include: The inspection module is used to obtain an overhead image of the target transmission tower based on the primary inspection path of the detection equipment, and determine the looseness monitoring group according to the relative position relationship of each cable to be inspected in the overhead image; An acquisition module, used to determine a secondary inspection path of the detection device based on the overhead image, and obtain a comparison image group taken by the detection device on the looseness monitoring group based on the secondary inspection path; An analysis module, used for performing deformation analysis on each of the cables to be inspected in the loose monitoring group according to the comparison image group, to obtain deformation judgment data corresponding to the loose monitoring group; A display module is used to generate looseness monitoring data corresponding to the target transmission tower based on the deformation judgment data and send it to the management end.

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