A cable terminal defect detection device based on electric field and magnetic field changes

Abstract

The present invention relates to the field of electric power supply technology, specifically a cable terminal defect detection device based on electric field and magnetic field changes, including a climbing module, a rotating module, a moving module and a driving module. The climbing module includes a connecting frame detachably mounted on the cable and a climbing wheel rotatably arranged on the connecting frame. The rotating module includes an annular frame connected to the connecting frame and detachably mounted on the cable and a rotating platform arranged on the annular frame and moving circumferentially along the annular frame. The moving module includes a mounting frame assembled on the rotating platform and moving linearly along the radial extension line of the cable and a detector connected to the mounting frame. The problem in the prior art that manual climbing of the cable terminal pole tower is required for cable terminal detection is solved, which is time-consuming and labor-intensive and has the risk of electric shock and falling from height.

Description

Technical Field

[0001] The invention relates to the technical field of electric power supply, and in particular to a cable terminal defect detection device based on changes in electric and magnetic fields. Background Art

[0002] With the rapid development of society, people's demand for electricity is also increasing, and the requirements for power supply reliability are getting higher and higher. In order to ensure the normal operation of power equipment, it is necessary to carry out live or power-off detection of power equipment or lines, so as to timely discover and eliminate defects or hidden dangers of equipment or lines, avoid power outages caused by equipment failures, and affect the normal electricity demand of society. Compared with power outage detection, live detection can be carried out without powering off the equipment or lines, which is conducive to reducing external power outages and is more in line with society's expectations for electricity demand.

[0003] The existing detection method requires manual climbing of the cable terminal tower for detection, which is time-consuming and laborious, and has the risk of electric shock and falling from heights. At the same time, the existing detection instruments cannot perform 360° detection of cables. We propose a cable terminal defect detection device based on changes in electric and magnetic fields. Summary of the invention

[0004] In order to solve the technical problems that the detection methods in the prior art are time-consuming and labor-intensive, have the risk of electric shock and falling from heights, and cannot perform all-round detection, the present invention provides a cable terminal defect detection device based on changes in electric and magnetic fields, which solves the above technical problems.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] The present invention provides a cable terminal defect detection device based on changes in electric and magnetic fields, characterized in that it comprises: a climbing module, the climbing module comprises a connecting frame detachably mounted on the cable and a climbing wheel rotatably configured on the connecting frame and simultaneously attached to the outer wall of the cable; a rotating module, the rotating module comprises an annular frame connected to the connecting frame and detachably mounted on the cable and a rotating platform configured on the annular frame and performing circumferential motion along the annular frame; a moving module, the moving module comprises a mounting frame mounted on the rotating platform and performing linear motion along the radial extension line of the cable and a detector connected to the mounting frame; a driving module, the driving module comprises a climbing driving assembly arranged on the climbing module for driving the climbing wheel to rotate, a circumferential driving assembly arranged on the rotating module for driving the rotating platform to perform circumferential motion, and a linear driving assembly arranged on the moving module for driving the mounting frame to perform linear motion.

[0007] Furthermore, the connection frame is formed by four right-angle base blocks that are bent once, each of the right-angle base blocks is connected to a climbing wheel, and both ends of the climbing wheel shaft of each climbing wheel are rotatably arranged on two right-angle sides of each right-angle base block.

[0008] Furthermore, connecting components are provided on two opposite sides of the connecting frame, and the connecting components include: a connecting sleeve, which is fixed to the end of a right-angled side of the right-angle base block; a fixing sleeve, which is fixed to the end of a right-angled side of an adjacent right-angled base block and is positioned opposite to the connecting sleeve; a connecting rod, which is arranged between the connecting sleeve and the fixing sleeve, the first end of the connecting rod is rotatably limited in the connecting sleeve, and the second end of the connecting rod is screwed to the fixing sleeve.

[0009] Furthermore, a convex ring for axial limiting is provided on the first end of the connecting rod, and correspondingly, a groove for axial limiting is provided at the matching position between the connecting sleeve and the convex ring.

[0010] Furthermore, adjustment components are provided on the other two opposite sides of the connecting frame, and the adjustment components include: a fixed block, which is fixed to the end of a right-angled side of the right-angle base block; a threaded block, which is fixed to the end of a right-angled side of an adjacent right-angled base block and is positioned opposite to the fixed block; an adjustment rod, which is arranged between the fixed block and the threaded block, the first end of the adjustment rod is rotatably limited in the fixed block, and the second end of the adjustment rod is screwed to the threaded block; a compression spring, which is sleeved on the adjustment rod and is limited between the fixed block and the threaded block.

[0011] Furthermore, the climbing drive assembly includes a first motor arranged on the right-angle base block, a first gear is arranged on the driving shaft of the first motor, and the first gear drives the climbing wheel to rotate through climbing wheel teeth arranged at the end of the climbing wheel shaft.

[0012] Furthermore, a circumferential sliding groove is provided on the annular frame, and a circumferential sliding block which fits in the circumferential sliding groove is provided on an end surface of the rotating platform facing the circumferential sliding groove.

[0013] Further, it is characterized in that the circumferential drive assembly includes a second motor configured on the rotating platform, a second gear is configured on the driving shaft of the second motor, and the second gear cooperates with a gear ring formed on the outer peripheral wall of the annular frame to drive the rotating platform to move.

[0014] Furthermore, the mounting frame is assembled on the rotating platform through a linear sliding pair, and the linear sliding groove of the linear sliding pair extends along the radial direction of the cable.

[0015] Furthermore, the linear drive assembly includes a third motor arranged on the mounting frame, a third gear is arranged on the driving shaft of the third motor, and the third gear cooperates with a rack arranged on the rotating platform to drive the mounting frame to perform linear motion.

[0016] Furthermore, it also includes a power supply module, which includes a power supply device configured on the connection frame and an induction power ring connected to the bottom of the connection frame and sleeved on the cable, and the induction power ring is electrically connected to the power supply device.

[0017] Furthermore, it also includes a position detection module and a data recording module, the position detection module is used to detect the spatial position of the detector at each detection point, and the data recording module is used to record and store the spatial position data of the detector at each detection point, as well as the electric field and magnetic field intensity values ​​corresponding to the spatial position data of each detection point.

[0018] Based on the above technical solution, the technical effects that can be achieved by the present invention are:

[0019] The connection frame of the climbing module of the cable terminal defect detection device based on electric field and magnetic field changes of the present invention is sleeved on the periphery of the cable at the lower part of the cable terminal. When the connection frame is connected, the climbing wheel on the connection frame fits against the outer wall of the cable, and the rotation of the climbing wheel can drive the entire device to move up and down on the cable so that the detector can measure the electric field strength and magnetic field strength values ​​at different heights; the rotating platform of the rotating module can make circumferential motion around the cable, so that the detector can obtain the electric field strength and magnetic field strength values ​​on the trajectory of the circumferential motion; the mounting frame of the moving module can make linear motion on the rotating platform, and the trajectory of the linear motion is on the radial extension line of the cable, that is to say, by changing the distance between the mounting frame and the cable, and cooperating with the rotating module, the detector can obtain the electric field and magnetic field strength values ​​of a circular ring plane around the vertical cable at the same height, and then cooperate with the climbing module to measure the electric field strength and magnetic field strength values ​​within the three-dimensional space around the cable, thereby solving the technical problems that the detection method in the prior art is time-consuming and labor-intensive, has the risk of electric shock and falling from a height, and cannot perform detection in all directions. In actual applications, multiple measurements are performed at different time periods. By comparing the changes in data, it is possible to discover and eliminate defects in advance, avoid cable line failures, and ensure line safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the cable terminal defect detection device based on electric field and magnetic field changes of the present invention;

[0021] Figure 2 is a schematic diagram of a climbing module of the present invention;

[0022] Figure 3 yes Figure 2 A partial enlarged view of part A;

[0023] Figure 4 is a schematic diagram of a right-angle base block of the present invention;

[0024] Figure 5 is a top view of the rotating module of the present invention;

[0025] Figure 6 is a bottom view of the rotating module of the present invention;

[0026] Figure 7 is a schematic diagram of a mobile module of the present invention;

[0027] Figure 8 Schematic diagram of the power supply ring of the present invention.

[0028] Among them: 1-climbing module, 11-connecting frame, 12-climbing wheel, 121-climbing wheel shaft, 122-climbing wheel teeth, 13-right angle base block, 131-first motor, 132-first gear, 14-connecting assembly, 141-connecting sleeve, 142-fixing sleeve, 143-connecting rod, 1431-convex ring, 15-adjusting assembly, 151-fixing block, 152-threaded block, 153-adjusting rod, 154-compression spring; 2-rotating module, 21-annular frame, 211-circumferential sliding Groove, 212-arc half body, 2121-connecting ear, 213-hinge rod, 214-toothed ring, 22-rotating platform, 221-second motor, 222-second gear, 23-counterweight, 24-connecting ring; 3-mobile module, 31-mounting frame, 311-third motor, 312-third gear, 32-detector, 33-linear sliding pair, 331-linear slide groove, 34-rack, 35-block; 4-induction power ring, 41-half iron core, 42-copper wire. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. 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.

[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0031] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0032] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0033] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0034] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0035] like Figure 1-8 As shown, the cable terminal defect detection device based on electric field and magnetic field changes of the present application includes a climbing module 1, a rotating module 2, a moving module 3 and a driving module. The climbing module 1 includes a connecting frame 11 detachably mounted on the cable and a climbing wheel 12 rotatably configured on the connecting frame 11. The contact portion between the climbing wheel 12 and the outer wall of the cable is preferably made of rubber material. The rotating module 2 includes an annular frame 21 connected to the connecting frame 11 and detachably mounted on the cable and a rotating platform 22 configured on the annular frame 21 and performing circumferential motion along the annular frame 21. The moving module 3 includes a mounting frame 31 assembled on the rotating platform 22 and performing linear motion along the radial extension line of the cable and a detector 32 connected to the mounting frame 31. The driving module includes a climbing driving assembly arranged on the climbing module 1 for driving the climbing wheel 12 to rotate, a circumferential driving assembly arranged on the rotating module 2 for driving the rotating platform 22 to perform circumferential motion, and a linear driving assembly arranged on the moving module 3 for driving the mounting frame 31 to perform linear motion.

[0036] The connection frame 11 of the climbing module 1 of the cable terminal defect detection device based on electric field and magnetic field changes of the present application is sleeved on the periphery of the cable at the lower part of the cable terminal. When the connection frame 11 is connected, the climbing wheel 12 on the connection frame 11 fits against the outer wall of the cable. The rotation of the climbing wheel 12 can drive the entire device to move up and down on the cable so that the detector 32 can measure the electric field and magnetic field strength values ​​at different heights; the rotating platform 22 of the rotating module 2 can move circumferentially around the cable, so that the detector 32 can obtain the electric field and magnetic field strength values ​​on the circumferential motion trajectory; the moving module The mounting frame 31 of 3 can make linear motion on the rotating platform 22, and the trajectory of the linear motion is on the radial extension line of the cable, that is to say, by changing the distance between the mounting frame 31 and the cable, and cooperating with the rotating module 2, the detector 32 can obtain the electric field and magnetic field strength values ​​of a circular ring plane outside the vertical cable at the same height, and then cooperate with the climbing module 1 to measure the electric field and magnetic field strength values ​​within the three-dimensional space outside the cable, thereby solving the technical problems that the detection method in the prior art is time-consuming and labor-intensive, has the risk of electric shock and falling from a height, and cannot perform detection in all directions. In actual applications, multiple measurements are performed at different time periods, and by comparing the changes in data, it can play a technical effect of discovering and eliminating defects in advance, avoiding cable line failures, and ensuring line safety.

[0037] In the climbing module 1 of the present application, the connection frame 11 is formed by four right-angle base blocks 13 that are bent once, and each right-angle base block 13 is connected to a climbing wheel 12. Both ends of the climbing wheel shaft 121 of each climbing wheel 12 are rotatably arranged on the two right-angle sides of each right-angle base block 13. Specifically, a mounting groove is provided on the right-angle base block 13, and the first motor 131 of the climbing drive assembly is arranged in the mounting groove. The first motor 131 is preferably a servo motor, and the first gear 132 is fixedly connected to the driving shaft of the first motor 131. At the same time, the end of the climbing wheel shaft 121 is fixedly connected to the climbing wheel teeth 122, and the climbing wheel teeth 122 are meshed with the first gear 132.

[0038] In the climbing module 1 of the present application, connection components 14 are provided on two opposite sides of the connection frame 11, such as Figure 1-2The upper and lower opposite sides of the middle connection frame 11, the connection assembly 14 includes a connection sleeve 141, a fixing sleeve 142 and a connection rod 143, the connection sleeve 141 is fixed at the end of a right angle side of the right angle base block 13, the fixing sleeve 142 is fixed at the end of a right angle side of the adjacent right angle base block 13, and the position is opposite to the connection sleeve 141, the connection rod 143 is arranged between the connection sleeve 141 and the fixing sleeve 142, the first end of the connection rod 143 is rotatably limited in the connection sleeve 141, and the second end of the connection rod 143 is screwed to the fixing sleeve 142. Specifically, a through hole is opened on the connection sleeve 141, the first end of the connection rod 143 is rotatably arranged in the through hole, and at the same time, a convex ring 1431 for axial limiting is arranged on the first end of the connection rod 143, and accordingly, one section of the through hole is expanded outward to form a groove for axial limiting, and the convex ring 1431 is matched in the groove to form an axial limit for the first end of the connection rod 143.

[0039] In the climbing module 1 of the present application, the other two opposite sides of the connecting frame 11 are provided with adjustment components 15, such as Figure 1-2 The left and right opposite sides of the middle connecting frame 11, the adjusting assembly 15 includes a fixed block 151, a threaded block 152, an adjusting rod 153 and a compression spring 154, the fixed block 151 is fixed to the end of a right-angled side of the right-angle base block 13, the threaded block 152 is fixed to the end of a right-angled side of the adjacent right-angle base block 13, and the position is opposite to the fixed block 151, the adjusting rod 153 is arranged between the fixed block 151 and the threaded block 152, the first end of the adjusting rod 153 is rotatably limited in the fixed block 151, the second end of the adjusting rod 153 is screwed to the threaded block 152, the compression spring 154 is sleeved on the adjusting rod 153, and the compression spring 154 is limited between the fixed block 151 and the threaded block 152. Specifically, the cooperation mode between the first end of the adjusting rod 153 and the fixing block 151 can be selected as the cooperation mode between the first end of the connecting rod 143 and the connecting sleeve 141, and the compression spring 154 arranged between the fixing block 151 and the threaded block 152 makes the adjustment more convenient.

[0040] When the climbing module 1 of this embodiment is sleeved on the cable, the connecting rod 143 on the upper and lower opposite sides of the connecting frame 11 is first rotated to make the second end of the connecting rod 143 escape from the fixing sleeve 142, so that the connecting frame 11 is divided into two left and right frames, and then the frames are assembled again from the cable side, and the second end of the connecting rod 143 is screwed into the fixing sleeve 142, and the tightness is adjusted at the same time, so that the climbing wheel 12 is closely attached to the outer wall of the cable, and then the tightness between the climbing wheel 12 and the cable is further adjusted by adjusting the adjusting rod 153 of the adjusting component 15. Then the first gear 132 of the first motor 131 is controlled to rotate, and the first gear 132 rotates to drive the climbing wheel teeth 122 to rotate, and the climbing wheel teeth 122 rotate to drive the climbing wheel shaft 121 to rotate, and the climbing wheel shaft 121 rotates to drive the climbing wheel 12 to rotate, thereby controlling the rise and fall of the connecting frame 11 on the cable so that the detector 32 can measure the electric field and magnetic field strength values ​​at different heights. It should be noted that the friction between the climbing wheel 12 and the cable must be greater than the gravity of the cable terminal defect detection device based on changes in electric and magnetic fields to ensure that the cable terminal defect detection device based on changes in electric and magnetic fields can stay at any height of the cable during the climbing process. At the same time, in order to achieve climbing, the force applied by the first motor 131 of the climbing drive assembly to the climbing wheel 12 must be greater than the friction between the climbing wheel 12 and the cable.

[0041] In the rotating module 2 of the present application, the annular frame 21 is formed by two left and right arc-shaped half bodies 212 that are detachably connected. The two arc-shaped half bodies 212 are connected by connecting ears 2121 arranged at both ends of the arc-shaped half bodies 212. Figure 6-7 As shown, a single arc half body 212 is connected to the connection frame 11 through two hinge rods 213, and the two hinge rods 213 are respectively hinged on two corresponding right-angle base blocks 13 connected together through the adjustment assembly 15. Further, a circumferential slide groove 211 is provided on the top surface of the annular frame 21, and a circumferential slider is slidably matched in the circumferential slide groove 211, and the circumferential slider is fixedly connected to the rotating platform 22 of the rotating module 2, and the rotating platform 22 is fixedly connected to the second motor 221 of the circumferential drive assembly, and the second motor 221 is preferably a servo motor, and the second gear 222 is fixedly connected to the driving shaft of the second motor 221, and the second gear 222 is meshed with the gear ring 214 formed on the outer peripheral wall of the annular frame 21.

[0042] In the rotating module 2 of the present application, in order to ensure the balance of the annular frame 21, a counterweight block 23 is also arranged in the circumferential slide groove 211 of the annular frame 21. The counterweight block 23 is fixedly connected to the rotating platform 22 through a connecting ring 24. At the same time, the counterweight block 23 and the rotating platform 22 are distributed at the positions of the two farthest quadrant points of the circular ring formed by the circumferential slide groove 211. Accordingly, the connecting ring 24 is loosely fitted in the slide groove and can be selected to be a semicircular arc or a full circular arc.

[0043] The rotating module 2 in this embodiment needs to be installed on the cable together with the climbing module 1. After the connection of the connecting frame 11 is completed, the two arc-shaped halves 212 of the annular frame 21 are assembled on the periphery of the cable through the connecting ears 2121, and then the second gear 222 on the second motor 221 is controlled to make the rotating platform 22 rotate along the circumferential groove 211 on the annular frame 21, so that the detector 32 can obtain the electric field and magnetic field strength values ​​on the circumferential motion trajectory.

[0044] In the mobile module 3 of the present application, the mounting frame 31 is assembled on the rotating platform 22 through a linear sliding pair 33, and the linear sliding pair 33 includes a linear slide 331 and a linear slider, and the linear slide 331 extends along the radial direction of the cable. Specifically, a linear slide 331 is provided on the rotating platform 22 and a rack 34 parallel to the linear slide 331 is provided, a linear slider matching the linear slide 331 is provided on the mounting frame 31, and a third motor 311 is provided on the mounting frame 31, and the third motor 311 is preferably a servo motor, and a third gear 312 is provided on the driving shaft of the third motor 311, and the third gear 312 is meshed with the rack 34. In order to prevent the mounting frame 31 from sliding off the rotating platform 22, both ends of the linear slide 331 are provided with blocks 35 for blocking the mounting frame 31.

[0045] The mobile module 3 of this embodiment cooperates with the rotating module 2. By adjusting the distance between the mounting frame 31 and the cable, the diameter of the circumferential motion of the detector 32 becomes longer or shorter, so that the electric field and magnetic field strength values ​​at different distances from the axis of the cable can be measured on the same plane.

[0046] The cable terminal defect detection device based on electric field and magnetic field changes of the present invention also includes a power supply module, which includes a power supply device configured on the connection frame 11 and an induction power ring 4 connected to the bottom of the connection frame 11. The induction power ring 4 is sleeved on the cable and electrically connected to the power supply device. The induction power ring 4 includes two annular half-cores 41, and copper wires 42 are wound around the half-cores 41. The copper wires 42 transmit the generated induced current to the power supply device, and the power supply device converts the induced current into the required rated current and provides it to each electrical device on the detection device. Specifically, the half-core 41 is connected to the bottom of the connection frame 11 through a semi-rigid connector to avoid interference from the connection frame 11 when the two half-cores 41 are docked. The ends of the docking of the two half-cores 41 are configured with a concave-convex structure that facilitates docking. At the same time, a groove is arranged on the outer ring end face of the half-core 41, and a ring clamp is matched in the groove. The staff tightens the two half-cores through the ring clamp.

[0047] The cable terminal defect detection device based on electric field and magnetic field changes of the present invention also includes a position detection module and a data recording module. The position detection module includes a plurality of position sensors, and the plurality of position sensors are used to feedback the spatial position of the detector 32. Specifically, the position detection module includes a height sensor arranged on the rotating platform 22, a radial displacement sensor and an angle sensor arranged on the detector 32. The height sensor is used to detect the height of the detector 32 from the ground, the radial displacement sensor is used to detect the radial distance between the detector 32 and the cable, and the angle sensor is used to detect the circumferential angle of the detector 32 relative to the cable. The data recording module is used to record and store the spatial position data of the detector 32 at each detection point, as well as the electric field and magnetic field intensity values ​​corresponding to the spatial position data of each detection point. That is to say, the detector 32, the position detection module and the data recording module cooperate to correspond the electric field and magnetic field intensity values ​​of a detection point at a specific spatial position around the cable to the spatial position of the detection point and record the corresponding data. In the subsequent data processing, the external software is used to generate a stereoscopic display diagram of the electric field and magnetic field intensity values ​​of the cable terminal matching the spatial position.

[0048] In order to facilitate the zero position adjustment of the angle sensor, a compass for convenient positioning is configured on the detector 32. Note: In order to facilitate recording the angle value of the detector 32 relative to the cable, the zero position line of the angle sensor in this embodiment is the reference line in the south direction. Of course, the reference line in the south direction is only a preferred solution of the present application, and it can also be a reference line in the north, east or any other direction, as long as the reference line can coincide with the zero position line of the angle sensor.

[0049] The cable terminal defect detection device based on electric field and magnetic field changes of this embodiment is used as follows:

[0050] 1. Before testing, assemble the cable terminal defect detection device based on electric field and magnetic field changes on the cable to be tested. During the assembly process, it is necessary to place the detector 32 in the south direction so that the zero line of the angle sensor coincides with the south direction reference line to facilitate the recording of angle data;

[0051] 2. Detection and recording of data of a single detection point. The position detection module measures the height Z of the detector 32 from the ground, the radial distance L of the detector 32 from the cable, and the rotation angle ω of the detector 32 relative to the south direction of the cable. This position is a detection point. The spatial position of the detection point is recorded as (Z, L, ω). At the same time, the detector 32 measures the electric field strength value A and the magnetic field strength value B of the position and records them as (A, B). Then the data recording module corresponds the electric field and magnetic field strength values ​​of the detection point to the spatial position of the detection point and records them as [(A, B) and (Z, L, ω)];

[0052] 3. Big data collection. This process collects data from different detection points around the cable to be tested (height, radial distance, angle). This process can be done by automatic data collection or manual data collection. The spatial position of the starting detection point for automatic data collection is (Z0, L0, ω0), where the height above the ground Z0 takes the minimum value Z min , i.e. the lowest position where the detector 32 can be installed, the minimum radial distance L0 is min , that is, the detector 32 is at the limit position closest to the cable on the linear slide 331, and the rotation angle value ω0 takes the minimum value ω min , that is, the south direction of the cable, and then the data collection process can be subdivided into three cycles of large, medium and small according to the movement trajectory of the detector 32. A complete automatic data collection process is a large cycle, in which a large cycle includes multiple medium cycles, and a medium cycle includes multiple small cycles. The small cycle is limited to one rotation of the detector 32. If the detector 32 is set to take a value every 45 degrees, then it is manifested as the height above the ground value Z and the radial distance value L remain unchanged, the rotation angle value ω changes from 0 to 360 8 times, and takes 8 values, that is, 8 [(A, B) and (Z, L, ω)] data are collected in a small cycle, and the medium cycle is limited to the movement of the detector 32 from one extreme position to another extreme position on the linear slide 331. If the detector 32 is set to move 5 small sections and pause 6 times to complete the total length of the linear slide 331, then it is manifested as the height above the ground The value Z remains unchanged, L changes 6 times, the rotation angle value ω cycles from 0 to 360 6 times, and takes 48 values, that is, 48 ​​[(A, B) and (Z, L, ω)] data are collected in one medium cycle, and the large cycle is limited to the movement of the detector 32 from the lowest point to the highest point. If the detector 32 is set to move 9 small sections and pause 10 times to complete the total height of the cable to be tested, then it is manifested as the height Z changes 10 times, L cycles 10 times, and the rotation angle value ω cycles 60 times, taking 2880 values, that is, 2880 [(A, B) and (Z, L, ω)] data are collected in one large cycle. The above is a complete process of automatic data collection. Manual data collection is more flexible. The detection point position of the detector 32 can be adjusted at will, and the [(A, B) and (Z, L, ω)] data of the detection point can be recorded, which is mostly used to supplement the automatic data collection.

[0053] 4. Data collation: input the obtained [(A, B) and (Z, L, ω)] data into the third-party software, and mark multiple [(A, B) and (Z, L, ω)] data in space on the third-party software to form a corresponding three-dimensional display diagram.

[0054] The cable terminal defect detection device based on electric field and magnetic field changes of this embodiment is suitable for periodic detection of cables. For example, when the target line is just put into operation, the cable terminal is first detected and the corresponding data is recorded. After the target cable has been running for a period of time, the second detection is performed and the corresponding data is recorded. Then, periodic detection is performed to judge whether the cable has defects by comparing the changes in the electric field and magnetic field in the detection data, so as to eliminate defects in advance, avoid cable line failures, and ensure the safe operation of the line.

[0055] It should be understood that the specific embodiments described above are only used to explain the present invention, and are not used to limit the present invention. Obvious changes or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A cable terminal defect detection device based on electric field and magnetic field changes, characterized in that: include: A climbing module (1), the climbing module (1) comprising a connection frame (11) detachably sleeved on a cable and a climbing wheel (12) rotatably arranged on the connection frame (11) and simultaneously attached to an outer wall of the cable; A rotating module (2), the rotating module (2) comprising an annular frame (21) connected to the connecting frame (11) and detachably sleeved on the cable, and a rotating platform (22) arranged on the annular frame (21) and moving circumferentially along the annular frame (21); A moving module (3), the moving module (3) comprising a mounting frame (31) mounted on the rotating platform (22) and capable of performing linear motion along a radial extension line of the cable, and a detector (32) connected to the mounting frame (31); A driving module, the driving module comprising a climbing driving assembly arranged on the climbing module (1) for driving the climbing wheel (12) to rotate, a circumferential driving assembly arranged on the rotating module (2) for driving the rotating platform (22) to perform circumferential motion, and a linear driving assembly arranged on the moving module (3) for driving the mounting frame (31) to perform linear motion; The connection frame (11) is formed by four right-angle base blocks (13) that are bent once, each of the right-angle base blocks (13) is connected to a climbing wheel (12), and both ends of the climbing wheel shaft (121) of each climbing wheel (12) are rotatably arranged on two right-angle sides of each right-angle base block (13); Wherein, two opposite sides of the connection frame (11) are provided with connection components (14), and the connection components (14) include: A connecting sleeve (141), wherein the connecting sleeve (141) is fixed to the end of a right-angle side of the right-angle base block (13); A fixing sleeve (142), the fixing sleeve (142) being fixed to the end of a right-angle side of the adjacent right-angle base block (13) and being located opposite to the connecting sleeve (141); A connecting rod (143), the connecting rod (143) being arranged between the connecting sleeve (141) and the fixing sleeve (142), the first end of the connecting rod (143) being rotatably limited in the connecting sleeve (141), and the second end of the connecting rod (143) being screwed to the fixing sleeve (142); Wherein, a convex ring (1431) for axial limiting is arranged on the first end of the connecting rod (143), and correspondingly, a groove for axial limiting is arranged at a matching position between the connecting sleeve (141) and the convex ring (1431); Wherein, the other two opposite sides of the connection frame (11) are provided with adjustment components (15), and the adjustment components (15) include: A fixing block (151), wherein the fixing block (151) is fixed to an end of a right-angle side of the right-angle base block (13); A threaded block (152), the threaded block (152) being fixed at the end of a right-angled side of the adjacent right-angled base block (13) and being located opposite to the fixed block (151); an adjusting rod (153), the adjusting rod (153) being arranged between the fixing block (151) and the threaded block (152), the first end of the adjusting rod (153) being rotatably limited in the fixing block (151), and the second end of the adjusting rod (153) being threadedly connected to the threaded block (152); A compression spring (154), wherein the compression spring (154) is sleeved on the adjusting rod (153), and the compression spring (154) is limited between the fixing block (151) and the threaded block (152); The climbing drive assembly comprises a first motor (131) arranged on the right-angle base block (13); a first gear (132) is arranged on the driving shaft of the first motor (131); the first gear (132) drives the climbing wheel (12) to rotate via climbing wheel teeth (122) arranged at the end of the climbing wheel shaft (121); The annular frame (21) is provided with a circumferential slide groove (211), and an end surface of the rotating platform (22) facing the circumferential slide groove (211) is provided with a circumferential slide block that fits in the circumferential slide groove (211); The circumferential drive assembly comprises a second motor (221) arranged on the rotating platform (22); a second gear (222) is arranged on the driving shaft of the second motor (221); the second gear (222) cooperates with a gear ring (214) formed on the outer peripheral wall of the annular frame (21) to drive the rotating platform (22) to move; The mounting frame (31) is mounted on the rotating platform (22) via a linear sliding pair (33), and the linear sliding groove (331) of the linear sliding pair (33) extends along the radial direction of the cable; The linear drive assembly comprises a third motor (311) arranged on the mounting frame (31), a third gear (312) is arranged on the driving shaft of the third motor (311), and the third gear (312) cooperates with a rack (34) arranged on the rotating platform (22) to drive the mounting frame (31) to perform linear motion; Wherein, the detector (32) is provided with a compass for convenient positioning; The power supply module further comprises a power supply device arranged on the connection frame (11) and an induction power ring (4) connected to the bottom of the connection frame (11) and sleeved on the cable. The induction power ring (4) is electrically connected to the power supply device. The induction power ring (4) comprises two annular half cores (41). Copper wires (42) are wound around the half cores (41). The copper wires (42) transmit the generated induced current to the power supply device. The power supply device converts the induced current into the required rated current and provides it to various electrical devices on the detection device. The half cores (41) are connected to the bottom of the connection frame (11) through a semi-rigid connector to avoid interference of the two half cores (41) with the connection frame (11) when they are connected. The ends of the two half cores (41) at the connection point are provided with a concave-convex structure for facilitating connection. At the same time, a groove is arranged on the outer ring end face of the half core (41), and an annular clamp is matched in the groove. It also includes a position detection module and a data recording module, wherein the position detection module is used to detect the spatial position of the detector (32) at each detection point, and the data recording module is used to record and store the spatial position data of the detector (32) at each detection point, as well as the electric field and magnetic field intensity values ​​corresponding to the spatial position data of each detection point.

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