A power maintenance safety alarm device

Abstract

This application provides an electric power maintenance safety alarm device, which includes two semi-circular main bodies that can be detachably spliced. After splicing, they form a circular detector that can be easily sleeved on the target cable. Each semi-circular main body is internally provided with a power source, and its surface is provided with a semi-circular groove. The inner walls of the groove are respectively provided with positive and negative conductive layers and conductive cylinders. When in use, the staff only needs to splice the two semi-circular rings and sleeve them on the cable, and then turn on the power source. The magnetic field generated by the energized target cable interacts with the current in the conductive cylinder to generate an Ampere force to drive the detector to move along the cable. If there are defects in the cable, the magnetic field change at that place causes the Ampere force to decrease, which in turn affects the moving speed or acceleration of the detector. The processor judges the defect point based on this. This device significantly reduces the manual maintenance cost, improves the maintenance efficiency and accuracy, and effectively ensures the safety of the staff.

Description

Technical Field

[0001] This application relates to the technical field of power maintenance, and particularly to a power maintenance safety alarm device. Background Art

[0002] As an important carrier for power transmission, DC cables are widely used in high-voltage transmission lines, submarine cables, photovoltaic systems and other fields, meeting the needs of long-distance and large-capacity power with their efficient transmission performance. However, with the increase in service life, DC cables face many potential fault problems, such as cable skin damage, cable conductor breakage, grooving, etc., which may lead to a decline in transmission capacity and seriously threaten the stable operation of the power system.

[0003] Traditional manual maintenance methods have significant drawbacks in dealing with DC cable faults. On the one hand, manual inspection requires a large amount of manpower and material resources, with high costs; on the other hand, the laying environment of DC cables is complex and changeable, and maintenance personnel face high-risk environments such as working at heights and underwater, making it extremely easy to have safety accidents. In addition, manual detection methods often have difficulty in accurately locating the fault points, affecting the maintenance efficiency and accuracy. Summary of the Invention

[0004] The purpose of this application is to provide a power maintenance safety alarm device, which can improve the above problems.

[0005] The embodiments of this application are implemented as follows:

[0006] This application provides a power maintenance safety alarm device, which includes two semi-circular main bodies that can be detachably spliced. After splicing, a circular detector is formed, and the size of the central circular hole of the circular detector is greater than or equal to the outer diameter of the target cable to be maintained;

[0007] A power supply is configured on the semi-circular main body. On the surface of one half of the semi-circular main body, a semi-circular groove is provided. A positive conductive layer connected to the positive pole of the power supply is provided on the first arc-shaped inner wall of the semi-circular groove, and a negative conductive layer connected to the negative pole of the power supply is provided on the second arc-shaped inner wall of the semi-circular groove. At least one conductive column is provided between the positive conductive layer and the negative conductive layer;

[0008] At least one of the semi-circular main bodies is provided with a processor, a speed sensor electrically connected to the processor, and a communication module; the speed sensor is used to monitor the moving speed of the circular detector, the processor is used to detect the defect points of the target cable according to the moving speed, and transmit the detection result to the central terminal through the communication module.

[0009] It can be understood that since the target cable will generate direct current when energized, a magnetic field will be generated around the target cable according to the right-hand screw rule. After the power is turned on, a current will be generated in the conductive cylinder in this magnetic field. Therefore, the conductive cylinder will be subjected to an Ampere force along the extension direction of the target cable, thereby driving the entire ring detector to move along the extension direction of the target cable. If there is a defect at a certain position of the target cable, the magnetic field generated at that position will change, thereby reducing the above-mentioned Ampere force. Therefore, the defect point of the cable is judged by monitoring the moving speed or acceleration of the ring detector. When there is a defect at a certain place in the cable, the magnetic field at that position will change, resulting in a decrease in the Ampere force, and the moving speed or acceleration of the ring detector will also change accordingly. By capturing these changes, the processor can accurately locate the defect point of the cable.

[0010] It can be understood that the present application provides a power maintenance safety alarm device, which includes two detachable and spliced semi-circular main bodies. After splicing, they form a ring detector that can be easily sleeved on the target cable. Each semi-circular main body is internally provided with a power supply, and a semi-circular groove is provided on the surface. The inner walls of the groove are respectively provided with positive and negative conductive layers and conductive cylinders. When in use, the staff only needs to splice the two semi-circular rings and sleeve them on the cable, and then turn on the power supply. The device uses the interaction between the magnetic field generated by the energized cable and the current in the conductive cylinder to generate an Ampere force to drive the detector to move along the cable. If there is a defect in the cable, the change in the magnetic field at that place will cause the Ampere force to decrease, which in turn affects the moving speed or acceleration of the detector. The processor judges the defect point based on this. This device significantly reduces the labor maintenance cost and improves the maintenance efficiency and accuracy. It adopts a non-contact detection method and uses the interaction between the self-magnetic field of the cable and the conductive cylinder, which is both safe and reliable, and avoids high-risk working environments, effectively ensuring the safety of the staff.

[0011] In an alternative embodiment of the present application, after the two semi-circular main bodies are spliced, the two semi-circular grooves are spliced into a complete circular groove, and the central axis of the circular groove coincides with the central axis of the ring detector; the conductive cylinder is perpendicular to both the first arc-shaped inner wall and the second arc-shaped inner wall at the same time.

[0012] In an alternative embodiment of the present application, the processor is used to detect whether the target cable is normal according to the moving speed, including: when the moving speed is less than a preset speed threshold, recording the current position of the ring detector on the target cable as the defect point of the target cable.

[0013] In an alternative embodiment of the present application, an arc-shaped groove is provided on the third arc-shaped inner wall of the semi-circular ring-shaped main body, and at least one electromagnetic coil connected to the power supply is provided on the fourth arc-shaped inner wall of the arc-shaped groove. A semi-circular ring-shaped mover is accommodated in the arc-shaped groove; when the two semi-circular ring-shaped main bodies are spliced into a ring detector, the semi-circular ring-shaped movers in the two semi-circular ring-shaped main bodies are also spliced into a ring mover; a laser detector for detecting the thickness of the skin of the target cable is provided on the inner wall of the ring mover, and the laser detector is electrically connected to the processor; a magnet member is embedded at a position on the outer wall of the ring mover opposite to the electromagnetic coil. Under the drive of the magnetic field generated after the electromagnetic coil is energized, the magnet member generates a driving force along the tangential direction of the outer wall of the semi-circular ring-shaped mover, thereby driving the semi-circular ring-shaped mover to rotate relative to the semi-circular ring-shaped main body.

[0014] It can be understood that during the movement of the ring detector along the target cable, the electromagnetic coil is energized to generate a magnetic field, which drives the ring mover to rotate around the target cable. The laser detector rotates with the mover, emits laser light omnidirectionally and receives the reflected laser light. By calculating the time duration from the emission to the return of the laser, the distance of the reflector can be determined. When the distance decreases, it indicates that the laser encounters a damaged area on the cable skin, because the damaged area will change the reflection path of the laser, resulting in a shorter received laser time duration. The ring detector moves along the cable, and at the same time the ring mover rotates around the cable. The laser detector continuously emits and receives laser light, and the processor analyzes the change of the laser time duration in real time. When it is found that the time duration decreases abnormally, it is determined that the cable skin is damaged, and the damaged position is recorded.

[0015] It can be understood that the design of the ring mover realizes the omnidirectional and dead-angle-free detection of the cable skin, greatly improving the detection accuracy and efficiency. At the same time, laser detection has the advantages of non-contact, high precision, and fast response, and can timely detect and locate the damaged problem of the cable skin, providing strong technical support for the maintenance and repair of the cable.

[0016] In an alternative embodiment of the present application, M electromagnetic coils are symmetrically distributed in the ring detector, where M is a positive integer greater than 1, and N magnet members are symmetrically distributed on the ring mover, where N is a positive integer greater than 1; under the drive of the magnetic field of the electromagnetic coil, the magnet member can at least move to the position of the next electromagnetic coil.

[0017] In an alternative embodiment of the present application, the magnet member includes an S-pole magnet and an N-pole magnet connected in sequence, and the direction from the S-pole magnet to the N-pole magnet coincides with the direction of the driving force.

[0018] In an alternative embodiment of the present application, the ring mover includes a first semi-circular mover and a second semi-circular mover. A first magnet is embedded in the splicing surface of the first semi-circular mover, and a second magnet is embedded in the splicing surface of the second semi-circular mover. The first magnet and the second magnet have opposite magnetic polarities. The first semi-circular mover adsorbs the second magnet on the second semi-circular mover through the first magnet, thereby achieving splicing and forming the ring mover.

[0019] In an alternative embodiment of the present application, a third magnet is embedded in the splicing surface of the first semi-circular main body among the two semi-circular main bodies, and a fourth magnet is embedded in the splicing surface of the second semi-circular main body. The third magnet and the fourth magnet have opposite magnetic polarities. The first semi-circular main body adsorbs the fourth magnet on the second semi-circular main body through the third magnet, thereby achieving splicing and forming the ring detector.

[0020] In an alternative embodiment of the present application, a distance detector and an alarm device electrically connected to the processor are further provided on the outer wall of the ring detector; the processor is further configured to control the alarm device to perform an alarm operation when the object distance fed back by the distance detector is less than a preset distance value.

[0021] In an alternative embodiment of the present application, the alarm device includes at least one of a warning light, a speaker, and a display.

[0022] It can be understood that the ring detector may be interfered by accidental collisions with surrounding people or objects, thereby affecting the accuracy of the detection results. To address this issue, the present application adopts a technical solution of installing a distance detector and an alarm device on the outer wall of the ring detector. The distance detector can continuously monitor the distance between the detector and surrounding objects (including people). Once an object approaches within a preset safe distance, the alarm device will be triggered. For example, during cable maintenance in a busy power facility area, workers and other pedestrians may accidentally approach the detector. When the distance detector senses someone approaching, the alarm device will immediately remind the relevant personnel to keep a distance through methods such as flashing the warning light, sounding the speaker, or prompting on the display, thereby ensuring that the detection process is not interfered with.

[0023] Beneficial effects:

[0024] The present application provides a safety alarm device for power maintenance, which includes two detachable and spliced semi-circular main bodies. After splicing, they form a circular detector that can be easily sleeved on the target cable. Each semi-circular main body is internally provided with a power source, and its surface is provided with a semi-circular groove. The inner wall of the groove is respectively provided with positive and negative conductive layers and conductive columns. During use, the staff only needs to splice the two semi-circular rings and sleeve them on the cable, and then turn on the power supply. The device uses the interaction between the magnetic field generated by the energized cable and the current in the conductive columns to generate an Ampere force to drive the detector to move along the cable. If there are defects in the cable, the magnetic field change at that place will cause the Ampere force to decrease, thereby affecting the moving speed or acceleration of the detector. The processor judges the defect point based on this. This device significantly reduces the labor cost of maintenance, improves the maintenance efficiency and accuracy. It adopts a non-contact detection method, using the interaction between the magnetic field of the cable itself and the conductive columns, which is both safe and reliable, and avoids high-risk working environments, effectively ensuring the safety of the staff.

[0025] To make the above objects, features, and advantages of the present application more obvious and understandable, the following specifically provides optional embodiments and, in conjunction with the accompanying drawings, detailed descriptions are as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0027] Figure 1 is a schematic diagram of the external structure of a safety alarm device for power maintenance provided by the present application;

[0028] Figure 2 is Figure 1 a schematic diagram of the working state of the safety alarm device for power maintenance shown;

[0029] Figure 3 is a schematic diagram of the structure of two semi-circular main bodies provided by the present application;

[0030] Figure 4 is along Figure 3 a schematic cross-sectional view of the circular detector cut along the dotted line shown;

[0031] Figure 5 is Figure 3 a schematic diagram of the disassembly of a single semi-circular main body shown;

[0032] Figure 6 is a schematic diagram of the rotation principle of the circular mover 60 provided by the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0034] As Figure 1 shown, the present application provides a power maintenance safety alarm device, which includes a detachable and splicable first semi-circular main body 10 and a second semi-circular main body 20. After splicing, a circular detector is formed. The size of the central circular hole of the circular detector is greater than or equal to the outer diameter of the target cable 100 to be maintained. During use, the staff needs to splice the two semi-circular rings and sleeve them on the target cable 100, as Figure 2 shown.

[0035] Next, take the Figure 3 first semi-circular main body 10 as an example for introduction. The structure of the second semi-circular main body 20 is the same as that of the first semi-circular main body 10. A power supply (not shown in the figure) is configured on the first semi-circular main body 10. A semi-circular groove 11 is provided on the surface of one semi-circular ring of the first semi-circular main body 10. A positive conductive layer connected to the positive pole of the power supply is provided on the first arc-shaped inner wall 12 of the semi-circular groove 11, and a negative conductive layer connected to the negative pole of the power supply is provided on the second arc-shaped inner wall 13 of the semi-circular groove 11. At least one conductive column 14 is provided between the positive conductive layer and the negative conductive layer.

[0036] In an alternative embodiment of the present application, as Figure 4 shown, after the two semi-circular main bodies are spliced, the two semi-circular grooves are spliced into a complete circular groove 15, and the central axis of the circular groove 15 coincides with the central axis of the circular detector; the conductive column 14 is perpendicular to both the first arc-shaped inner wall 12 and the second arc-shaped inner wall 13 at the same time. It can be understood that since a direct current will be generated when the target cable 100 is energized, as Figure 4 shown, the target cable generates a current in the direction into the paper surface. According to the right-hand screw rule, this direct current will generate a magnetic field E around the target cable 100. After the power supply is turned on, a current i is generated in the conductive column 14 in this magnetic field. Therefore, the conductive column 14 will be subjected to an Ampere force along the extension direction of the target cable 100, thereby driving the entire circular detector to move along the extension direction of the target cable 100. If there is a defect at a certain position of the target cable 100, the magnetic field generated at this position will change, resulting in a decrease in the above-mentioned Ampere force. Therefore, the defect point of the cable is judged by monitoring the moving speed or acceleration of the circular detector. When there is a defect at a certain place on the cable, the magnetic field at this position will change, resulting in a decrease in the Ampere force, and the moving speed or acceleration of the circular detector will also change accordingly.

[0037] In at least one of the first semi-circular ring-shaped main body 10 and the second semi-circular ring-shaped main body 20, a processor, a speed sensor electrically connected to the processor, and a communication module are provided; the speed sensor is used to monitor the moving speed of the ring detector, the processor is used to detect the defect point of the target cable according to the moving speed, and transmit the detection result to the central terminal through the communication module.

[0038] It can be understood that the present application provides a power maintenance safety alarm device. When in use, if there is a defect in the cable, the magnetic field change at that place causes the Ampere force to decrease, which in turn affects the moving speed or acceleration of the detector. The processor determines the defect point based on this. This device significantly reduces the manual maintenance cost and improves the maintenance efficiency and accuracy. Adopting a non-contact detection method, using the interaction between the magnetic field of the cable itself and the conductive column, it is both safe and reliable, and avoids high-risk working environments, effectively ensuring the safety of the staff.

[0039] In an optional embodiment of the present application, the processor is used to detect whether the target cable is normal according to the moving speed, including: when the moving speed is less than a preset speed threshold, recording the current position of the ring detector on the target cable as the defect point of the target cable.

[0040] Take Figure 5 the first semi-circular ring-shaped main body 10 as an example for introduction. An arc-shaped groove 17 is provided on the third arc-shaped inner wall 16 of the first semi-circular ring-shaped main body 10. At least one electromagnetic coil 30 connected to the power supply is provided on the fourth arc-shaped inner wall 18 of the arc-shaped groove 17. A first semi-circular ring-shaped mover 40 is accommodated in the arc-shaped groove 17. When the two semi-circular ring-shaped main bodies are spliced into a ring detector, the semi-circular ring-shaped movers in the two semi-circular ring-shaped main bodies are also spliced into a ring mover 60, as Figure 6 shown. A laser detector (not shown in the figure) for detecting the skin thickness of the target cable 100 is provided on the inner wall of the ring mover 60. The laser detector is electrically connected to the processor. As Figure 6 shown, a magnet member 61 is embedded at a position on the outer wall of the ring mover 60 opposite to the electromagnetic coil 30. Under the drive of the magnetic field generated after the electromagnetic coil 30 is energized, the magnet member 61 generates a driving force along the tangent direction of the outer wall of the ring mover 60, thereby driving the ring mover 60 to rotate relative to the semi-circular ring-shaped main body.

[0041] It can be understood that during the movement of the ring detector along the target cable, the electromagnetic coil is energized to generate a magnetic field, driving the ring mover to rotate around the target cable. The laser detector rotates with the mover, emits laser light omnidirectionally and receives the reflected laser light. By calculating the time duration from the emission to the return of the laser, the distance to the reflector can be determined. When this distance decreases, it indicates that the laser has encountered a damaged area on the cable skin, because the damaged area will change the reflection path of the laser, resulting in a shorter received laser time duration. The ring detector moves along the cable, and at the same time the ring mover rotates around the cable. The laser detector continuously emits and receives laser light, and the processor analyzes the change in the laser time duration in real time. When it is found that the time duration decreases abnormally, it is determined that the cable skin is damaged, and the damaged position is recorded.

[0042] It can be understood that the design of the ring mover realizes the all-round and dead-angle-free detection of the cable skin, greatly improving the detection accuracy and efficiency. At the same time, laser detection has the advantages of non-contact, high precision, fast response, etc., and can timely detect and locate the damaged problem of the cable skin, providing strong technical support for the maintenance and repair of the cable.

[0043] In an alternative embodiment of the present application, M symmetrically distributed electromagnetic coils are provided inside the ring detector, where M is a positive integer greater than 1, and N magnet members are symmetrically distributed on the ring mover, where N is a positive integer greater than 1; the magnet members can move at least to the position of the next electromagnetic coil under the drive of the magnetic field of the electromagnetic coil.

[0044] In an alternative embodiment of the present application, as Figure 5 and Figure 6 shown, the magnet member 61 includes an S-pole magnet and an N-pole magnet connected in sequence, and the direction from the S-pole magnet to the N-pole magnet coincides with the direction of the driving force.

[0045] In an alternative embodiment of the present application, as Figure 3 shown, the ring mover includes a first semi-circular mover 40 and a second semi-circular mover (not shown in the figure). The splicing surface of the first semi-circular mover 40 is embedded with a first magnet 51, and the splicing surface of the second semi-circular mover is embedded with a second magnet (not shown in the figure). The first magnet 51 and the second magnet have opposite magnetic polarities. The first semi-circular mover 40 adsorbs the second magnet on the second semi-circular mover through the first magnet 51, thereby realizing splicing to form a ring mover.

[0046] In an alternative embodiment of the present application, as Figure 3As shown, a third magnet 52 is embedded in the splicing surface of the first semi-circular ring-shaped body 10 of the two semi-circular ring-shaped bodies, and a fourth magnet (not shown in the figure) is embedded in the splicing surface of the second semi-circular ring-shaped body 20. The third magnet 52 and the fourth magnet have opposite magnetic polarities. The first semi-circular ring-shaped body 10 adsorbs the fourth magnet on the second semi-circular ring-shaped body 20 through the third magnet 52, thereby realizing splicing and forming a ring detector.

[0047] In an alternative embodiment of the present application, a distance detector and an alarm device electrically connected to the processor are further provided on the outer wall of the ring detector; the processor is further configured to control the alarm device to perform an alarm operation when the object distance fed back by the distance detector is less than a preset distance value. In an alternative embodiment of the present application, the alarm device includes at least one of a warning light, a speaker, and a display.

[0048] It can be understood that the ring detector may be interfered by accidental collisions with surrounding people or objects, thereby affecting the accuracy of the detection results. To address this issue, the present application adopts a technical solution of installing a distance detector and an alarm device on the outer wall of the ring detector. The distance detector can continuously monitor the distance between the detector and surrounding objects (including people). Once an object approaches within a preset safe distance, the alarm device will be triggered. For example, during cable maintenance in a busy power facility area, workers and other pedestrians may inadvertently approach the detector. When the distance detector senses that someone is approaching, the alarm device will immediately remind the relevant personnel to keep a distance by means of flashing warning lights, sounding the speaker, or prompting on the display, thereby ensuring that the detection process is not interfered with.

[0049] It should be understood that in the embodiments of the present invention, the so-called processor may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), off-the-shelf programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0050] In various embodiments of the present disclosure, the expressions "first", "second", "the first", or "the second" used may modify various components regardless of order and / or importance, but these expressions do not limit the corresponding components. The above expressions are only configured for the purpose of distinguishing an element from other elements. For example, a first user device and a second user device represent different user devices, although both are user devices. For example, without departing from the scope of the present disclosure, the first element may be referred to as the second element, and similarly, the second element may be referred to as the first element.

[0051] When an element (e.g., a first element) is referred to as "(operatively or communicatively) coupled" or "(operatively or communicatively) coupled to" or "connected to" another element (e.g., a second element), it should be understood that the one element is directly connected to the other element or the one element is indirectly connected to the other element via yet another element (e.g., a third element). Conversely, it can be understood that when an element (e.g., a first element) is referred to as "directly connected" or "directly coupled" to another element (a second element), no element (e.g., a third element) is inserted between the two.

[0052] It should be noted that in this document, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element. In addition, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or may have different meanings, and their specific meanings need to be determined according to their explanations in the specific embodiment or further in combination with the context of the specific embodiment.

[0053] The above description is only an optional embodiment of the present application and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, technical solutions formed by mutually replacing the above features with (but not limited to) technical features having similar functions disclosed in the present application.

[0054] Depending on the context, as used herein, the words "if", "when" can be interpreted as "when...", "when...", "in response to determining", or "in response to detecting". Similarly, depending on the context, the phrase "if determined" or "if detected (stated condition or event)" can be interpreted as "when determined", "in response to determining", "when detected (stated condition or event)", or "in response to detecting (stated condition or event)".

[0055] The above description is only an optional embodiment of the present application and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included within the protection scope of the present application.

Claims

1. A safety alarm device for power maintenance, characterized in that, It includes two semi-circular main bodies that can be detachably spliced. After splicing, a circular detector is formed, and the size of the central circular hole of the circular detector is greater than or equal to the outer diameter of the target cable to be repaired; A power supply is configured on the semi-circular main body. A semi-circular groove is provided on the surface of one half of the semi-circular main body. A positive conductive layer connected to the positive pole of the power supply is provided on the first arc-shaped inner wall of the semi-circular groove, and a negative conductive layer connected to the negative pole of the power supply is provided on the second arc-shaped inner wall of the semi-circular groove. At least one conductive column is provided between the positive conductive layer and the negative conductive layer; At least one of the semi-circular main bodies is provided with a processor, a speed sensor electrically connected to the processor, and a communication module; the speed sensor is used to monitor the moving speed of the circular detector, and the processor is used to detect the defect points of the target cable according to the moving speed and transmit the detection result to the central terminal through the communication module; After the two semi-circular main bodies are spliced, the two semi-circular grooves are spliced into a complete circular groove, and the central axis of the circular groove coincides with the central axis of the circular detector; the conductive column is perpendicular to both the first arc-shaped inner wall and the second arc-shaped inner wall at the same time; The processor is used to detect whether the target cable is normal according to the moving speed, including: when the moving speed is less than the preset speed threshold, recording the current position of the circular detector on the target cable as the defect point of the target cable; An arc-shaped groove is provided on the third arc-shaped inner wall of the semi-circular main body. At least one electromagnetic coil connected to the power supply is provided on the fourth arc-shaped inner wall of the arc-shaped groove, and a semi-circular mover is accommodated in the arc-shaped groove; When the two semi-circular main bodies are spliced into a circular detector, the semi-circular movers in the two semi-circular main bodies are also spliced into a circular mover; A laser detector for detecting the skin thickness of the target cable is provided on the inner wall of the circular mover, and the laser detector is electrically connected to the processor; A magnetic member is embedded at a position on the outer wall of the circular mover opposite to the electromagnetic coil. Under the drive of the magnetic field generated after the electromagnetic coil is energized, the magnetic member generates a driving force along the tangent direction of the outer wall of the semi-circular mover, thereby driving the semi-circular mover to rotate relative to the semi-circular main body; M electromagnetic coils are symmetrically distributed in the circular detector, where M is a positive integer greater than 1, and N magnetic members are symmetrically distributed on the circular mover, where N is a positive integer greater than 1; Under the drive of the magnetic field of the electromagnetic coil, the magnetic member can at least move to the position of the next electromagnetic coil; The magnetic member includes an S-pole magnet and an N-pole magnet connected in sequence, and the direction from the S-pole magnet to the N-pole magnet coincides with the direction of the driving force; The ring mover includes a first semi-circular mover and a second semi-circular mover. A first magnet is embedded in the splicing surface of the first semi-circular mover, and a second magnet is embedded in the splicing surface of the second semi-circular mover. The first magnet and the second magnet have opposite magnetic polarities. The first semi-circular mover adsorbs the second magnet on the second semi-circular mover through the first magnet, thereby achieving splicing to form the ring mover; A third magnet is embedded in the splicing surface of the first semi-circular main body among the two semi-circular main bodies, and a fourth magnet is embedded in the splicing surface of the second semi-circular main body. The third magnet and the fourth magnet have opposite magnetic polarities. The first semi-circular main body adsorbs the fourth magnet on the second semi-circular main body through the third magnet, thereby achieving splicing to form the ring detector; A distance detector and an alarm device electrically connected to the processor are further arranged on the outer wall of the ring detector; The processor is further configured to control the alarm device to perform an alarm operation when the object distance fed back by the distance detector is less than a preset distance value; The alarm device includes at least one of a warning light, a speaker, and a display.

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