Distribution line draping degree monitoring device, control method and distribution line

Abstract

The invention discloses a distribution line drapability monitoring device, a control method and a distribution line. The distribution line drapability monitoring device comprises a monitoring module, a video processing module, a drapability calculation module and an alarm module. The output end of the monitoring module is in communication connection with the input end of the video processing module, and the monitoring module is used for acquiring video data of two adjacent electric poles and a cable between the two adjacent electric poles at a fixed acquisition point location; the output end of the video processing module is connected with the input end of the draping degree calculation module, and the video processing module is used for extracting image data from the video data to serve as a monitoring sample; the draping degree calculation module is used for calculating the actual sag distance of a cable between two adjacent electric poles according to the monitoring sample; and the alarm module is used for giving an alarm when the actual sag distance is greater than the sag distance threshold. The cable sag monitoring efficiency can be improved, the monitoring cost is reduced, and the problem that cable sag monitoring is inconvenient to operate and maintain is solved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of power distribution line monitoring, and in particular to a power distribution line sag monitoring device, a control method and a power distribution line. Background Art

[0002] The sag of a distribution line, also known as sag, refers to the distance between any point in the suspension curve of a transmission line and two supporting suspension objects. In distribution lines, monitoring of sag is crucial to ensure the safe operation of the line.

[0003] The sag measurement of conventional distribution lines is often done manually, which has low measurement efficiency. In another existing transmission line sag monitoring method, the sag of the transmission line is detected by installing a tilt sensor on the cable. This storage and operation cost is high and brings inconvenience to operation and maintenance. Therefore, the existing cable sag monitoring either has the problem of low efficiency or the problem of high monitoring cost and inconvenience in operation and maintenance. Summary of the invention

[0004] The present invention provides a distribution line sag monitoring device, a control method and a distribution line, so as to realize efficient and convenient monitoring of cable sag, with low monitoring cost and high monitoring efficiency.

[0005] In a first aspect, an embodiment of the present invention provides a distribution line sag monitoring device, the distribution line sag monitoring device comprising a monitoring module, a video processing module, a sag calculation module and an alarm module;

[0006] The output end of the monitoring module is communicatively connected to the input end of the video processing module, and the monitoring module is used to collect video data of two adjacent poles and the cables therebetween at a fixed collection point;

[0007] The output end of the video processing module is connected to the input end of the sag calculation module, and the video processing module is used to extract image data from the video data as a monitoring sample;

[0008] The output end of the sag calculation module is connected to the output end of the alarm module. The sag calculation module is used to calculate the actual sag distance of the cable between two adjacent poles according to the monitoring sample; the alarm module is used to issue an alarm when the actual sag distance is greater than the sag distance threshold.

[0009] Furthermore, the monitoring module includes an acquisition and positioning unit and an image acquisition unit;

[0010] The output end of the acquisition and positioning unit is connected to the input end of the image acquisition unit, and the output end of the image acquisition unit serves as the output end of the monitoring module;

[0011] The acquisition and positioning unit is used to use the midpoint of the horizontal distance line between two adjacent poles as the X-axis reference point a, the midpoint height of the shortest distance line between the cable and the two poles as the Z-axis reference point c, the distance when the complete image of the two adjacent poles and the cable between them can be taken at the same time as the Y-axis reference point b, the coordinate point (a, b, c) as the fixed acquisition point, and send the fixed acquisition point to the image acquisition unit;

[0012] The image acquisition unit acquires the video data of two adjacent poles and the cables therebetween at the fixed acquisition point.

[0013] Optionally, the image acquisition unit is a drone.

[0014] Further, the video processing module includes an identification storage unit and a sample extraction unit;

[0015] The input end of the identification storage unit is used as the input end of the video processing module, the output end of the identification storage unit is connected to the input end of the sample extraction unit, and the output end of the sample extraction unit is used as the output end of the video processing module;

[0016] The identification storage unit is used to add a unique identification number to the cable between two adjacent poles according to the fixed collection point, and store the video data and the corresponding unique identification number after the monitoring module collects the video data;

[0017] The sample extraction unit is used to extract continuous frames of the video data, and after traversing and comparing the continuous frames, select the frame image with the largest arc sag of the cable and the frame image with the smallest arc sag of the cable, and use the frame image with the smallest arc sag of the cable as the dynamic monitoring sample of the cable corresponding to the unique identification number, and use the frame image with the largest arc sag of the cable as the video data corresponding to the unique identification number as the monitoring sample.

[0018] Further, the alarm module includes a threshold comparison unit and an abnormal alarm unit;

[0019] The threshold comparison unit is used to obtain the sag distance threshold of the cable corresponding to the unique identification number, and compare the actual sag distance with the sag distance threshold;

[0020] The abnormal alarm unit is used to issue an alarm when the actual sag distance of the cable corresponding to the unique identification number is greater than the sag distance threshold; the abnormal alarm unit is also used to determine that the status of the cable corresponding to the unique identification number is normal when the actual sag distance is less than or equal to the sag distance threshold.

[0021] Furthermore, the distribution line sag monitoring device also includes a dynamic analysis module;

[0022] The input end of the dynamic analysis module is connected to the second output end of the sample extraction unit. The dynamic analysis module is used to obtain the dynamic monitoring sample in the sample extraction unit, obtain the minimum sag distance of the cable between two adjacent poles according to the dynamic monitoring sample, and subtract the actual sag distance from the minimum sag distance to obtain the sag change threshold of the cable between two adjacent poles.

[0023] Further, the sag calculation module includes a feature recognition unit and an image processing unit;

[0024] The input end of the feature recognition unit is used as the input end of the overhang calculation module, the output end of the feature recognition unit is connected to the input end of the image processing unit, and the output end of the image processing unit is used as the output end of the overhang calculation module;

[0025] The feature recognition unit is used to identify the connection point between the cable and the pole from the monitoring sample as the contact point, the bottom arc of the cable as the arc edge line, and the side edge of the pole as the vertical edge line;

[0026] The image processing unit is used to introduce a horizontal line between two adjacent vertical edge lines, and to move and adjust the horizontal line in the vertical direction. When the horizontal line moves up to be tangent to the arc edge line, the horizontal line is no longer moved to obtain the tangent point at this time; a line connecting two adjacent contact points is used as a reference line, and a perpendicular line parallel to the vertical edge line is drawn between the reference line and the tangent point, and the length of the perpendicular line is calculated as the actual sag distance.

[0027] Furthermore, the distribution line sag monitoring device further includes a marking coating, and the marking coating is arranged at a preset height of the pole;

[0028] The length of the marking coating is a preset length, and the feature recognition unit is further used to recognize the marking coating from the monitoring sample;

[0029] The image processing unit is specifically used to compare the length of the marking paint with the length of the vertical line to obtain a scaling ratio of the vertical line relative to the marking paint, and obtain the actual sag distance according to the scaling ratio and the preset length.

[0030] In a second aspect, an embodiment of the present invention further provides a control method for a distribution line sag monitoring device, the control method for a distribution line sag monitoring device is used to control the distribution line sag monitoring device according to any embodiment of the present invention, the control method comprising:

[0031] Control the monitoring module to collect video data of two adjacent poles and the cables therebetween at a fixed collection point;

[0032] Extracting image data from the video data as monitoring samples by the video processing module;

[0033] Calculate the actual sag distance of the cable between two adjacent poles according to the monitoring samples by the sag calculation module;

[0034] The alarm module is used to issue an alarm when the actual sag distance is greater than a sag distance threshold.

[0035] In a third aspect, an embodiment of the present invention further provides a distribution line, wherein the distribution line comprises the distribution line sag monitoring device according to any embodiment of the present invention.

[0036] The present invention provides a distribution line sag monitoring device, a control method and a distribution line, wherein the distribution line sag monitoring device comprises a monitoring module, a video processing module, a sag calculation module and an alarm module; the output end of the monitoring module is communicatively connected to the input end of the video processing module, and the monitoring module is used to collect video data of two adjacent poles and cables therebetween at a fixed collection point; the output end of the video processing module is connected to the input end of the sag calculation module, and the video processing module is used to extract image data from the video data as a monitoring sample; the output end of the sag calculation module is connected to the output end of the alarm module, and the sag calculation module is used to calculate the actual sag distance of the cable between two adjacent poles according to the monitoring sample; the alarm module is used to issue an alarm when the actual sag distance is greater than the sag distance threshold, thereby timely discovering the problem of excessive sag of the cable and ensuring the safe operation of the line. The present invention does not need to set up additional sensors on the cable, and can realize efficient and convenient monitoring of the cable sag through the collection of video images. While the monitoring cost is low, it has high monitoring efficiency and is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic structural diagram of a distribution line sag monitoring device provided in an embodiment of the present invention.

[0038] Figure 2 A schematic structural diagram of a distribution line sag monitoring device provided in an embodiment of the present invention.

[0039] Figure 3 A simulation schematic diagram of a power distribution line provided by an embodiment of the present invention.

[0040] Figure 4 The present invention is a flowchart of a control method of a distribution line sag monitoring device in an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0042] An embodiment of the present invention provides a distribution line sag monitoring device. The distribution line sag monitoring device of the embodiment of the present invention is suitable for monitoring the sag of distribution lines to ensure the safe operation of the lines. The distribution line sag monitoring device of the embodiment of the present invention does not require additional sensors to be installed on the cables. Efficient and convenient monitoring of the cable sag can be achieved through the acquisition of video images, which solves the problems of existing cable sag monitoring, such as low efficiency, high monitoring cost, and inconvenient operation and maintenance. Figure 1 A schematic diagram of a distribution line sag monitoring device provided by an embodiment of the present invention is shown in FIG. Figure 1 As shown, the distribution line sag monitoring device includes a monitoring module 110 , a video processing module 120 , a sag calculation module 130 and an alarm module 140 .

[0043] The output end of the monitoring module 110 is communicatively connected to the input end of the video processing module 120, and the monitoring module 110 is used to collect video data of two adjacent poles and the cables therebetween at a fixed collection point; the output end of the video processing module 120 is connected to the input end of the sag calculation module 130, and the video processing module 120 is used to extract image data from the video data as a monitoring sample; the output end of the sag calculation module 130 is connected to the output end of the alarm module 140, and the sag calculation module 130 is used to calculate the actual sag distance of the cable between two adjacent poles based on the monitoring sample; the alarm module 140 is used to issue an alarm when the actual sag distance is greater than the sag distance threshold.

[0044] Among them, the sag of the distribution line, also known as sag, refers to the distance from any point in the suspension curve of the transmission line to the two supporting suspension objects. Therefore, if the actual sag distance of the cable between two adjacent poles exceeds a certain range, the cable will discharge due to insufficient cross-span distance, endangering power production and the safety of the surrounding areas of the transmission line. Therefore, the actual sag distance of the cable must be limited within a certain threshold range to ensure the safe and stable operation of the transmission line. In the implementation of the present invention, the sag calculation module 130 calculates the actual sag distance of the cable between two adjacent poles based on the monitoring sample, so that the alarm module 140 issues an alarm when the actual sag distance is greater than the sag distance threshold, so as to promptly discover the problem of excessive sag of the cable and ensure the safe operation of the line. Optionally, the monitoring module 110 can be a video acquisition device with a flight function, so that video data of two adjacent poles and the cables between them can be collected at a fixed acquisition point at any height.

[0045] Specifically, in order to realize the convenient collection of the actual situation of the cable, the monitoring module 110 collects the video data of the two adjacent poles and the cables therebetween at the fixed collection point, and the video processing module 120 extracts the image data from the video data. The image frame in the video data that can better reflect the actual sag distance of the cable between the two adjacent poles can be used as image data, and the image data can be used as a monitoring sample, so that there is no need to set up additional sensors on the cable. The efficient and convenient monitoring of the cable sag can be realized through the collection of the video screen. The monitoring cost is low, and the monitoring efficiency is high, which is more convenient to use. The output end of the sag calculation module 130 is connected to the output end of the alarm module 140. The sag calculation module 130 calculates the actual sag distance of the cable between the two adjacent poles according to the monitoring sample. The calculation process can be obtained by geometric calculation based on the length of each line of the image in the monitoring sample, or by comparing the height of the known fixed marker with the actual sag of the cable between the two adjacent poles. The alarm module 140 issues an alarm when the actual sag distance is greater than the sag distance threshold, so as to timely discover the problem of excessive sag of the cable and ensure the safe and stable operation of the cable.

[0046] It should be noted that, in the process of video data acquisition by the monitoring module 110, the integrity of the images of the cables and adjacent poles must be ensured, so that the collected samples are more comprehensive and efficient, providing convenient guarantee for the subsequent calculation of the actual sag distance of the cables. The video processing module 120 extracts clear and effective image data from the video data, providing a reliable reference for the dynamic change detection of the actual sag distance of the cables, and the monitoring effect is more comprehensive.

[0047] The embodiment of the present invention provides a distribution line sag monitoring device, which includes a monitoring module, a video processing module, a sag calculation module and an alarm module; the output end of the monitoring module is communicatively connected to the input end of the video processing module, and the monitoring module is used to collect video data of two adjacent poles and the cables therebetween at a fixed collection point; the output end of the video processing module is connected to the input end of the sag calculation module, and the video processing module is used to extract image data from the video data as a monitoring sample; the output end of the sag calculation module is connected to the output end of the alarm module, and the sag calculation module is used to calculate the actual sag distance of the cable between two adjacent poles according to the monitoring sample; the alarm module is used to issue an alarm when the actual sag distance is greater than the sag distance threshold, thereby timely discovering the problem of excessive sag of the cable and ensuring the safe operation of the line. The present invention does not need to set up additional sensors on the cable, and can realize efficient and convenient monitoring of the cable sag through the collection of video images. While the monitoring cost is low, it has high monitoring efficiency and is more convenient to use.

[0048] Figure 2 A schematic diagram of a distribution line sag monitoring device provided by an embodiment of the present invention is shown in FIG. Figure 2 As shown, further, the monitoring module 110 includes a collection and positioning unit 111 and an image collection unit 112 ; the output end of the collection and positioning unit 111 is connected to the input end of the image collection unit 112 , and the output end of the image collection unit 112 serves as the output end of the monitoring module 110 .

[0049] The acquisition and positioning unit 111 is used to use the midpoint of the horizontal distance line between two adjacent poles as the X-axis reference point a, the midpoint height of the shortest distance line between the cable and the two poles as the Z-axis reference point c, the distance when the complete image of the two adjacent poles and the cable between them can be captured simultaneously as the Y-axis reference point b, the coordinate point (a, b, c) as the fixed acquisition point, and send the fixed acquisition point to the image acquisition unit 112; the image acquisition unit 112 acquires video data of the two adjacent poles and the cable between them at the fixed acquisition point.

[0050] in, Figure 3 A simulation schematic diagram of a power distribution line provided by an embodiment of the present invention, such as Figure 3 As shown, Figure 3 The vertical edge line in is the vertical edge line of the pole and can be used to refer to the pole. Figure 3 The arc edge line in is the arc edge line of the cable. The arc edge line can refer to the cable. Figure 3 The contact point in the diagram is the connection point between the cable and the pole.

[0051] Specifically, in order to realize the convenient collection of the actual situation of the cable, the monitoring module 110 composed of the acquisition and positioning unit 111 and the image acquisition unit 112 collects the video data of the two adjacent poles and the cables therebetween at a fixed spatial point. After obtaining the horizontal distance line between the two adjacent poles, the acquisition and positioning unit 111 uses the midpoint of the horizontal distance line between the two adjacent poles as the X-axis reference point a. After obtaining the shortest distance line between the cable and the connection points of the two poles, the midpoint height of the shortest distance line between the cable and the connection points of the two poles is used as the Z-axis reference point c. The distance when the complete image of the two adjacent poles and the cables therebetween can be taken at the same time is used as the Y-axis reference point b. The coordinate point (a, b, c) is used as a fixed acquisition point to complete the positioning of the fixed acquisition point of the video data of the two adjacent poles and the cables therebetween, and the fixed acquisition point is sent to the image acquisition unit 112, so that the image acquisition unit 112 collects the video data of the two adjacent poles and the cables therebetween at the fixed acquisition point. Among them, as a preferred solution, the distance at which a drone with a high-definition camera can simultaneously capture complete images of two adjacent poles and the cables between them is the shortest distance to the cables. By determining fixed collection points, efficient collection of the actual cable conditions can be achieved.

[0052] Preferably, the image acquisition unit 112 is a drone.

[0053] Among them, the drone carries a high-definition camera and can fly to a fixed collection point to collect video data of two adjacent poles and cables.

[0054] For further information, please refer to Figure 2 The video processing module 120 includes an identification storage unit 121 and a sample extraction unit 122; the input end of the identification storage unit 121 serves as the input end of the video processing module 120, the output end of the identification storage unit 121 is connected to the input end of the sample extraction unit 122, and the output end of the sample extraction unit 122 serves as the output end of the video processing module 120.

[0055] The identification storage unit 121 is used to add a unique identification number to the cable between two adjacent poles according to the fixed collection point, and store the video data and the corresponding unique identification number after the monitoring module 110 collects the video data.

[0056] The sample extraction unit 122 is used to extract continuous frames of the video data. After traversing and comparing the continuous frames, the frame image with the largest arc sag of the cable and the frame image with the smallest arc sag of the cable are selected, and the frame image with the smallest arc sag of the cable is used as the dynamic monitoring sample of the cable corresponding to the unique identification number, and the frame image with the largest arc sag of the cable is used as the video data corresponding to the unique identification number as the monitoring sample.

[0057] Specifically, as a preferred solution, in order to achieve efficient processing of collected video data and obtain diversified monitoring samples, the identification storage unit 121 adds a unique identification number to the cable between two adjacent poles according to the fixed collection point, and after the monitoring module 110 collects the video data, the video data and the corresponding unique identification number are stored.

[0058] In order to realize the dynamic change monitoring of the cable, the sample extraction unit 122 extracts continuous frames of the video data, and after traversing and comparing the continuous frames, selects the frame image with the largest arc sag of the cable and the frame image with the smallest arc sag of the cable, and uses the frame image with the smallest arc sag of the cable as the dynamic monitoring sample of the cable corresponding to the unique identification number, and uses the frame image with the largest arc sag of the cable as the video data corresponding to the unique identification number as the monitoring sample. Among them, the selection of the frame image with the largest arc sag and the smallest arc sag can be achieved by identifying the bottom edge of the cable in the continuous frame image through image recognition technology, and after obtaining the plane coordinates of the lowest point of the bottom edge in the continuous frame image, the frame image with the largest arc sag and the smallest arc sag can be selected according to the height of the Y axis.

[0059] For further information, please refer to Figure 2 The distribution line sag monitoring device also includes a dynamic analysis module 150; the input end of the dynamic analysis module 150 is connected to the second output end of the sample extraction unit 122, and the dynamic analysis module 150 is used to obtain the dynamic monitoring sample in the sample extraction unit 122, and obtain the minimum sag distance of the cable between two adjacent poles according to the dynamic monitoring sample, and subtract the actual sag distance from the minimum sag distance to obtain the sag change threshold of the cable between two adjacent poles.

[0060] Specifically, the dynamic analysis module 150 obtains the dynamic monitoring samples in the sample extraction unit 122, obtains the minimum sag distance of the cable between two adjacent poles according to the dynamic monitoring samples, subtracts the actual sag distance from the minimum sag distance to obtain the sag change threshold of the cable between the two adjacent poles, and thus analyzes the sag change threshold of the cable between the two adjacent poles to determine whether the sag change of the cable between the two adjacent poles is normal, thereby improving the safety of the cable line.

[0061] It should be noted that when making an abnormality judgment, the reference sample corresponding to the frame image with the largest sag is selected. When it is necessary to perform a dynamic change analysis of the actual sag distance of the cable, the actual sag distance in the reference sample corresponding to the frame image with the smallest sag is obtained. The difference between these two actual sag distances is the change threshold. In order to further extend the analysis, the wind speed, temperature and humidity at the location of the cable corresponding to the change threshold can also be collected and analyzed to provide reference data for the analysis of the factors affecting the change of the sag of the distribution line and the degree of influence.

[0062] Further, in order to calculate the actual sag distance of the cable based on the frame image, continue to refer to Figure 2 and Figure 3 The sag calculation module 130 includes a feature recognition unit 131 and an image processing unit 132; the input end of the feature recognition unit 131 serves as the input end of the sag calculation module 130, the output end of the feature recognition unit 131 is connected to the input end of the image processing unit 132, and the output end of the image processing unit 132 serves as the output end of the sag calculation module 130.

[0063] The feature recognition unit 131 is used to identify the connection point between the cable and the pole from the monitoring sample as the contact point, the bottom arc of the cable as the arc edge line, and the side edge of the pole as the vertical edge line; the image processing unit 132 is used to introduce a horizontal line between two adjacent vertical edge lines, and adjust the horizontal line in the vertical direction. When the horizontal line moves to be tangent to the arc edge line, the horizontal line is no longer moved to obtain the tangent point at this time; a line is connected between two adjacent contact points as a reference line, and a perpendicular line parallel to the vertical edge line is drawn between the reference line and the tangent point, and the length of the perpendicular line is calculated as the actual sag distance.

[0064] Specifically, the feature recognition unit 131 uses image recognition technology to identify the connection point between the cable and the pole from the monitoring sample as the contact point, the bottom arc edge line of the cable, and the vertical edge line on the opposite side of the two connected poles. The image simulation is as follows: Figure 3 As shown. The image processing unit 132 introduces a horizontal line between the two edge lines, and moves and adjusts the horizontal line in the vertical direction. When the horizontal line moves up to be tangent to the arc edge line, the horizontal line is no longer moved, and the tangent point at this time is obtained. After connecting the two contact points, the reference line is used as the reference line, and the perpendicular line between the reference line and the tangent point is selected as the sag distance. Previously, the image processing unit 132 can carry out marking painting of a preset length on the pole, so as to obtain the length of the marking painting in the reference sample, calculate the scaling factor of the marking painting in the reference sample, and divide the sag distance in the reference sample by the scaling factor to obtain the actual sag distance of the cable.

[0065] Optional, such as Figure 3 As shown, the distribution line sag monitoring device also includes a marking paint, which is set at a preset height of the pole; the length of the marking paint is a preset length, and the feature recognition unit is also used to identify the marking paint from the monitoring sample; the image processing unit is specifically used to compare the length of the marking paint with the length of the vertical line, to obtain the scaling ratio of the vertical line relative to the marking paint, and to obtain the actual sag distance according to the scaling ratio and the preset length.

[0066] Further, in order to realize intelligent judgment on whether the actual sag distance of the cable is safe, continue to refer to Figure 2The alarm module 140 includes a threshold comparison unit 141 and an abnormal alarm unit 142; the threshold comparison unit 141 is used to obtain the sag distance threshold of the cable corresponding to the unique identification number, and compare the actual sag distance with the sag distance threshold; the abnormal alarm unit 142 is used to issue an alarm when the actual sag distance of the cable corresponding to the unique identification number is greater than the sag distance threshold; the abnormal alarm unit 142 is also used to determine that the state of the cable corresponding to the unique identification number is normal when the actual sag distance is less than or equal to the sag distance threshold.

[0067] Specifically, the sag distance threshold can be set according to actual conditions such as the height of the cable from the ground. After the threshold comparison unit 141 obtains the sag distance threshold of the cable corresponding to the unique identification number, the actual sag distance is compared with the sag distance threshold, and the comparison result can also be sent to the abnormal alarm unit 142. The abnormal alarm unit 142 issues an alarm when the actual sag distance of the cable corresponding to the unique identification number is greater than the sag distance threshold. Conversely, when the actual sag distance of the cable corresponding to the unique identification number is less than or equal to the sag distance threshold, it is determined that the cable is in a normal state. The alarm of the abnormal alarm unit 142 can timely discover the problem of excessive sag of the cable, thereby ensuring the safe and stable operation of the cable.

[0068] The embodiment of the present invention provides a sag monitoring device for a distribution line, which includes a monitoring module, a video processing module, a sag calculation module and an alarm module; the monitoring module ensures the integrity of the images of the cable and the adjacent poles, wherein the video data collection and the collection samples are more comprehensive and efficient, providing convenient guarantee for the subsequent calculation of the actual sag distance of the cable. By setting a logo coating and image processing, the convenient calculation of the sag distance can be realized, and the monitoring is efficient while having the advantages of low cost and easy operation. The video processing module extracts frame images after acquiring video data, and after acquiring several frame images within a set time period, it can efficiently analyze the height changes of the lowest point of the cable sag, and then obtain the frame images with the maximum sag and the minimum sag, providing a reliable reference for the dynamic change detection of the actual sag distance of the cable, and the monitoring effect is more comprehensive. The alarm module issues an alarm when the actual sag distance is greater than the sag distance threshold, thereby timely discovering the problem of excessive sag of the cable and ensuring the safe operation of the line. The distribution line sag monitoring device in the embodiment of the present invention does not require additional sensors to be installed on the cables. It can realize efficient and convenient monitoring of the cable sag through the acquisition of video images. It has low monitoring cost, high monitoring efficiency and is more convenient to use.

[0069] The embodiment of the present invention also provides a control method for a distribution line sag monitoring device. Figure 4: is a flow chart of a control method of a distribution line sag monitoring device in an embodiment of the present invention. The control method of the distribution line sag monitoring device in an embodiment of the present invention is used to control the distribution line sag monitoring device in any embodiment of the present invention, such as Figure 4 As shown, the control method includes:

[0070] S110. Control the monitoring module to collect video data of two adjacent poles and the cables therebetween at a fixed collection point.

[0071] Specifically, refer to Figure 1 and Figure 2 The monitoring module 110 collects video data of two adjacent poles and the cables therebetween at fixed collection points. The monitoring module 110 may be a drone with a high-definition camera. The distance at which the drone with a high-definition camera can simultaneously capture complete images of two adjacent poles and the cables therebetween is the shortest distance to the cables. By determining fixed collection points, efficient collection of the actual cable conditions can be achieved.

[0072] S120 . Extracting image data from the video data through a video processing module as a monitoring sample.

[0073] Specifically, by extracting image data from the video data through the video processing module 120, the image frame in the video data that can better reflect the actual sag distance of the cable between two adjacent poles can be used as image data, and the image data can be used as a monitoring sample. There is no need to install additional sensors on the cables. Efficient and convenient monitoring of the cable sag can be achieved through the acquisition of video images. While the monitoring cost is low, it has high monitoring efficiency and is more convenient to use.

[0074] S130. Calculate the actual sag distance of the cable between two adjacent poles according to the monitoring samples through the sag calculation module.

[0075] Specifically, the sag calculation module 130 calculates the actual sag distance of the cable between two adjacent poles according to the monitoring samples, so as to compare the actual sag distance with the sag distance threshold.

[0076] S140. Using the alarm module, an alarm is issued when the actual sag distance is greater than the sag distance threshold.

[0077] Specifically, the alarm module 140 issues an alarm when the actual sag distance is greater than the sag distance threshold, so as to promptly discover the problem of excessive sag of the cable and ensure the safe and stable operation of the cable.

[0078] In addition, the control method of the distribution line sag monitoring device of the embodiment of the present invention includes but is not limited to the above process. The control method of the distribution line sag monitoring device of the embodiment of the present invention can adaptively set the relevant control process according to the distribution line sag monitoring device in any embodiment of the present invention to achieve the function and technical effect of the distribution line sag monitoring device in any embodiment of the present invention.

[0079] The embodiment of the present invention provides a control method for a sag monitoring device for a distribution line, which collects video data of two adjacent poles and the cables therebetween at a fixed collection point by controlling a monitoring module; extracts image data from the video data as a monitoring sample by a video processing module; calculates the actual sag distance of the cable between two adjacent poles according to the monitoring sample by a sag calculation module; and issues an alarm when the actual sag distance is greater than a sag distance threshold by an alarm module, thereby promptly discovering the problem of excessive sag of the cable and ensuring the safe operation of the line. The embodiment of the present invention does not require additional sensors to be installed on the cable, and can achieve efficient and convenient monitoring of the cable sag by collecting video images. While the monitoring cost is low, it has high monitoring efficiency and is more convenient to use.

[0080] An embodiment of the present invention further provides a distribution line, which includes the distribution line sag monitoring device in any of the above embodiments, thereby achieving the function and technical effect of the distribution line sag monitoring device in the above embodiments.

[0081] In an embodiment of the present invention, the distribution line also has a plurality of poles and cables, the cables are supported by the poles, and the cables are connected to the power grid, so that long-distance transmission of electricity can be realized. The distribution line can detect the actual sag distance of the cables between each two adjacent poles through the distribution line sag monitoring device, and issue an alarm when the actual sag distance is greater than the sag distance threshold, so as to timely discover the problem of excessive sag of the cables in the distribution line, ensure the safe operation of the distribution line, and improve the reliability of the power grid operation.

[0082] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A distribution line sag monitoring device, characterized in that: The distribution line sag monitoring device comprises a monitoring module, a video processing module, a sag calculation module and an alarm module; The output end of the monitoring module is communicatively connected to the input end of the video processing module, and the monitoring module is used to collect video data of two adjacent poles and the cables therebetween at a fixed collection point; The output end of the video processing module is connected to the input end of the sag calculation module, and the video processing module is used to extract image data from the video data as a monitoring sample; The output end of the sag calculation module is connected to the output end of the alarm module. The sag calculation module is used to calculate the actual sag distance of the cable between two adjacent poles according to the monitoring sample; the alarm module is used to issue an alarm when the actual sag distance is greater than the sag distance threshold.

2. The distribution line sag monitoring device according to claim 1, characterized in that: The monitoring module includes an acquisition and positioning unit and an image acquisition unit; The output end of the acquisition and positioning unit is connected to the input end of the image acquisition unit, and the output end of the image acquisition unit serves as the output end of the monitoring module; The acquisition and positioning unit is used to use the midpoint of the horizontal distance line between two adjacent poles as the X-axis reference point a, the midpoint height of the shortest distance line between the cable and the two poles as the Z-axis reference point c, the distance when the complete image of the two adjacent poles and the cable between them can be taken at the same time as the Y-axis reference point b, the coordinate point (a, b, c) as the fixed acquisition point, and send the fixed acquisition point to the image acquisition unit; The image acquisition unit acquires the video data of two adjacent poles and the cables therebetween at the fixed acquisition point.

3. The distribution line sag monitoring device according to claim 2, characterized in that: The image acquisition unit is a drone.

4. The distribution line sag monitoring device according to claim 1, characterized in that: The video processing module includes a marker storage unit and a sample extraction unit; The input end of the identification storage unit is used as the input end of the video processing module, the output end of the identification storage unit is connected to the input end of the sample extraction unit, and the output end of the sample extraction unit is used as the output end of the video processing module; The identification storage unit is used to add a unique identification number to the cable between two adjacent poles according to the fixed collection point, and store the video data and the corresponding unique identification number after the monitoring module collects the video data; The sample extraction unit is used to extract continuous frames of the video data, and after traversing and comparing the continuous frames, select the frame image with the largest arc sag of the cable and the frame image with the smallest arc sag of the cable, and use the frame image with the smallest arc sag of the cable as the dynamic monitoring sample of the cable corresponding to the unique identification number, and use the frame image with the largest arc sag of the cable as the video data corresponding to the unique identification number as the monitoring sample.

5. The distribution line sag monitoring device according to claim 4, characterized in that: The alarm module includes a threshold comparison unit and an abnormal alarm unit; The threshold comparison unit is used to obtain the sag distance threshold of the cable corresponding to the unique identification number, and compare the actual sag distance with the sag distance threshold; The abnormal alarm unit is used to issue an alarm when the actual sag distance of the cable corresponding to the unique identification number is greater than the sag distance threshold; the abnormal alarm unit is also used to determine that the status of the cable corresponding to the unique identification number is normal when the actual sag distance is less than or equal to the sag distance threshold.

6. The distribution line sag monitoring device according to claim 4, characterized in that: Also includes a dynamic analysis module; The input end of the dynamic analysis module is connected to the second output end of the sample extraction unit. The dynamic analysis module is used to obtain the dynamic monitoring sample in the sample extraction unit, obtain the minimum sag distance of the cable between two adjacent poles according to the dynamic monitoring sample, and subtract the actual sag distance from the minimum sag distance to obtain the sag change threshold of the cable between two adjacent poles.

7. The distribution line sag monitoring device according to claim 1, characterized in that: The sag calculation module includes a feature recognition unit and an image processing unit; The input end of the feature recognition unit is used as the input end of the overhang calculation module, the output end of the feature recognition unit is connected to the input end of the image processing unit, and the output end of the image processing unit is used as the output end of the overhang calculation module; The feature recognition unit is used to identify the connection point between the cable and the pole from the monitoring sample as the contact point, the bottom arc of the cable as the arc edge line, and the side edge of the pole as the vertical edge line; The image processing unit is used to introduce a horizontal line between two adjacent vertical edge lines, and to move and adjust the horizontal line in the vertical direction. When the horizontal line moves up to be tangent to the arc edge line, the horizontal line is no longer moved to obtain the tangent point at this time; a line connecting two adjacent contact points is used as a reference line, and a perpendicular line parallel to the vertical edge line is drawn between the reference line and the tangent point, and the length of the perpendicular line is calculated as the actual sag distance.

8. The distribution line sag monitoring device according to claim 7, characterized in that: It also includes a logo painting, wherein the logo painting is arranged at a preset height of the pole; The length of the marking coating is a preset length, and the feature recognition unit is further used to recognize the marking coating from the monitoring sample; The image processing unit is specifically used to compare the length of the marking paint with the length of the vertical line to obtain a scaling ratio of the vertical line relative to the marking paint, and obtain the actual sag distance according to the scaling ratio and the preset length.

9. A control method for a distribution line sag monitoring device, characterized in that: The control method of the distribution line sag monitoring device is used to control the distribution line sag monitoring device according to any one of claims 1 to 8, and the control method comprises: Control the monitoring module to collect video data of two adjacent poles and the cables therebetween at a fixed collection point; Extracting image data from the video data as monitoring samples by the video processing module; Calculate the actual sag distance of the cable between two adjacent poles according to the monitoring samples by the sag calculation module; The alarm module is used to issue an alarm when the actual sag distance is greater than a sag distance threshold.

10. A power distribution line, characterized in that: The distribution line comprises the distribution line sag monitoring device as described in any one of claims 1 to 8 above.

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