3710 results about "Cable line" patented technology

The invention discloses a cable aging test system and method based on the Internet of Things, and relates to the technical field of cable testing, and the method comprises the steps: collecting cable operation parameters in real time through a circuit breaker node disposed in a cable line, and synchronously monitoring the environment temperature and humidity; wherein the cable operation parameters comprise conductor temperature, leakage current, voltage fluctuation value and load power; the collected cable operation parameters are transmitted to a cloud platform through an Internet of Things communication module; analyzing the aging degree value of the cable insulation layer based on an electrothermal two-factor synergistic aging model; dynamically calculating an ignition risk value of the cable through a fire risk assessment algorithm in combination with the aging degree value; and when the aging degree value or the ignition risk value exceeds a threshold value, generating an early warning report, pushing the early warning report to the terminal equipment, and marking the position of the hidden danger at the same time.

The invention relates to the field of cable fault identification, in particular to a high-voltage cable fault identification method for on-line monitoring of sheath current, which comprises the following steps of: firstly, monitoring in real time through a sheath current sensor, a fault traveling wave collector and a cable temperature sensor at key positions along a line, collecting cable line parameters, analyzing normal operation data, and determining the fault of a high-voltage cable according to the normal operation data; establishing a sheath current and temperature characteristic model, calculating the sheath current in real time and comparing the model, if the sheath current exceeds a threshold value, preliminarily judging a fault, and then calculating a fault area through traveling waves; temperature change data are obtained in a fault area, and an average temperature highest point area is found through calculation to accurately calibrate a fault position. According to the method, cable operation conditions are comprehensively mastered by multiple means, faults can be found in time, fault areas and positions can be accurately determined, fault types can be accurately judged according to multi-aspect information, the accuracy and timeliness of high-voltage cable fault recognition are effectively improved, safe and stable operation of a power system is powerfully guaranteed, and the working efficiency is improved. The operation and maintenance cost is reduced; and the cable management level is improved.

The invention relates to the technical field of communication engineering, in particular to a communication optical cable line intelligent inspection fault point rapid positioning method and device, and the method comprises the steps: obtaining optical cable line state data, constructing an intelligent fault detection model, recognizing an abnormal signal through wavelet transform and a threshold determination method, training an LSTM neural network in combination with historical fault data, and pre-judging a fault type. When a fault is detected, an unmanned aerial vehicle inspection unit is triggered, an inspection path is planned based on an improved Dijkstra algorithm according to the fault type and suspected fault area geographic information, an optical cable line is scanned and detected through a laser radar, physical fault features are recognized through a YOLOv5 algorithm, and geographic coordinates of a fault point are calibrated in combination with an inertial navigation system; and fusing sensor data and a detection result, evaluating a fault confidence level by adopting a DS evidence theory, and generating an alarm work order. Therefore, the problems of long positioning time consumption, high omission ratio, difficulty in distinguishing fault types and the like in the prior art are solved.

The invention relates to a high-voltage cable intelligent inspection method and system based on multimode identification, and the method comprises the steps: deploying an intelligent identifier and cable monitoring equipment according to the equipment characteristics and environmental conditions in a high-voltage cable line; reading identification data of the intelligent identification through a double-frequency reading device, and collecting cable state monitoring data through a cable monitoring device; the information is uploaded to the Internet of Things cloud platform; carrying out fusion analysis on the received data in the cloud platform, evaluating the health condition of the cable in combination with a historical record and a fault recognition model, and generating an inspection result; and displaying the inspection result through the intelligent monitoring center, calculating the risk score of each device according to the identification data, the cable state monitoring data and the fault risk prediction result, and dynamically adjusting the optimal inspection route and the inspection frequency. Compared with the prior art, unique identification and multi-dimensional information storage of the cable and accessory equipment of the cable are achieved, and the fineness and comprehensiveness of cable operation state monitoring are improved.

The invention discloses a wire core fatigue monitoring device, method and equipment of an aerial cable, and belongs to the technical field of electric power facilities. The device comprises a cable data acquisition module used for acquiring cable rack distance data on two sides of a target position of an aerial cable and sagging radian data of the cable; the traction tension acquisition module is used for determining the traction tension applied to the target position of the cable according to the coil holder distance data and the droop radian data; the swing amplitude data acquisition module is used for acquiring swing amplitude data generated by the aerial cable under the action of wind power within a preset period; the torsion data calculation module is used for calculating torsion data borne by the target position according to the swing amplitude data and the droop radian data; and the fatigue degree determining module is used for determining the fatigue degree of the aerial cable core at the target position according to the traction tension and the torsion data. According to the technical scheme, the operation safety of the cable can be monitored in real time, the cable core with a relatively large fatigue degree can be found and replaced in time, and the normal operation of the cable is prevented from being influenced.

The invention relates to the technical field of cable line power distribution network harmonic resonance treatment, in particular to a global and local cooperative partition cooperative resonance suppression method and device. The method comprises the steps of determining a harmonic conductance sensitivity index of each node in a power distribution network according to a target power distribution network admittance matrix parameter, and performing node region division; performing modal analysis on the admittance matrix parameters to obtain modal impedance and participation factors; determining a global optimal virtual admittance instruction value according to the modal impedance, the participation factor and the voltage distortion rate; according to the global optimal virtual admittance instruction value and the voltage distortion rate, determining a regional optimal virtual admittance instruction value in the region; and determining a harmonic compensation current value according to the regional optimal virtual admittance instruction value and the harmonic voltage. According to the method, harmonic suppression is realized for the whole power distribution network by adopting a partition and cooperation mode, and meanwhile, for background harmonic injection change, external interference such as resonance center offset and the like can be effectively overcome, so that the optimal harmonic suppression effect is realized.

The invention discloses an explosion-proof cable processing device and method, and belongs to the technical field of explosion-proof cable processing, the explosion-proof cable processing device comprises a cooling box and a heat treatment box fixed on one side of the top surface of the cooling box, and further comprises a traction roller, a traction motor, a rotating gear ring, an elastic rolling part, a rotating mechanism, a wiping roller and a movable wiping mechanism; according to the invention, the outer surface of the cable core insulating layer is subjected to movable wiping treatment of cooling water through the wiping roller, and meanwhile, the outer surface of the cable core insulating layer is subjected to axial stress elimination treatment to a certain extent; therefore, the outer surface of the cable core insulating layer is subjected to circumferential compression type stress relief treatment through the elastic rolling part, and the outer surface of the cable core insulating layer is subjected to heat treatment to relieve stress in cooperation with the heat treatment box, so that the stress relief modes of the cable core insulating layer are diversified, and the stress relief rate of the cable core insulating layer is obviously improved.

The invention discloses a cable with a liquid cooling heat dissipation function. The cable comprises a closed cable section, an input cable section and an output cable section, the closed cable section is a completely-sealed cable section and is mainly used for liquid cooling heat dissipation of the cable; the input cable section is mainly used for transition connection between a power supply end and the closed cable section; and the output cable section is mainly used for transition connection between the closed cable section and a power utilization end. Through the synergistic effect of the insulating liquid cooling oil, the annular cooling fins, the complete through holes, the one-way through holes and the like, heat generated by operation of the cable can be rapidly absorbed and dissipated, local overheating is avoided, stable operation of the cable is ensured, and the heat dissipation efficiency is improved; compared with a mode of additionally arranging a spiral metal tube on the whole cable, the material and transportation cost is reduced, and the flexibility is not sacrificed; the high-quality material selection and the reasonable structural design ensure the electrical insulation performance, reduce the faults caused by the heat dissipation problem, and prolong the service life of the cable.

The invention discloses a power distribution network traveling wave switch fault positioning precision verification method and system, and relates to the technical field of power distribution networks, and the method comprises the steps: simulating an actual cable line, checking the length of the line, and obtaining a power supply needed by a power distribution network traveling wave switch in combination with the voltage of a transformer isolation line; the fault occurrence time of the resistor action simulation line is controlled, different user loads of the line are simulated in combination with the capacitor charging and discharging action, and line electrification or fault occurrence and power failure are judged through a line electrification indication signal; and configuring the traveling wave switch based on a power supply required by the power distribution network traveling wave switch, and verifying the fault positioning precision of the power distribution network traveling wave switch in combination with the line length, the line fault occurrence time and the fault simulation result. Traveling wave monitoring points are reasonably arranged according to the length of a line, it is ensured that traveling wave signals can be rapidly monitored when a fault occurs, and the traveling wave signals when the fault occurs and the time difference of the signals transmitted to the monitoring points are collected through the configured traveling wave switch.

The invention discloses a high altitude area cable fault early warning and fault positioning method comprising the following steps: monitoring terminals are installed at two ends of a cable line, respectively collect traveling wave signals generated by a cable having a partial discharge source / fault point, carry out on-site data processing on the traveling wave signals, and carry out feature extraction by applying wavelet analysis; and the partial discharge pulse signals are uploaded to a background master station through a wireless or optical fiber communication channel, the background master station draws a partial discharge map according to long-period statistical information such as the amplitude, the number of times and the corresponding power frequency phase of the partial discharge pulse signals, and judgment and fault early warning are carried out on the partial discharge type and the development trend of the cable according to the change condition of the map. According to the invention, the wavelet analysis technology is used to extract the main characteristic quantity of the partial discharge signal, the main characteristic quantity is sent to the background master station through a wireless or optical fiber communication channel, and the arrival time of the wave head of the voltage traveling wave is determined and the fault distance of the power grid is calculated through the wave head identification method of the voltage traveling wave, thereby realizing the fault location of the voltage traveling wave of the power grid. Therefore, the position of the fault point is accurately calculated.

The invention discloses an intelligent cable fault positioning and diagnosing method and system based on double-end traveling waves, and relates to the technical field of cable fault positioning and diagnos.The method comprises the steps that monitoring systems are synchronously arranged at the two ends of a cable line, a self-adaptive signal adjusting mechanism is designed, and double-end data of a transmitting signal and a receiving signal are processed based on the double-end traveling waves; and constructing a topological structure model of the cable network by using the double-end traveling wave data features, training a fault point location by using a double-end data fault training model, and completing diagnosis of intelligent positioning of a cable fault. According to the invention, the problems of signal attenuation and noise interference are solved, the identification capability of a small partial discharge phenomenon is enhanced, the accurate positioning of a fault point in a complex multi-branch cable network is realized, the state of the cable network can be updated in real time, the method adapts to environmental changes, and the timeliness of a diagnosis result is ensured.

The invention discloses a radio frequency electromagnetic energy explosion testing device and method. The device comprises a closed gas cavity, a testing cable, a linear driving mechanism and a processing circuit. The airtight gas cavity is filled with explosive gas. The test cable comprises an inner conductor and an outer conductor, the outer conductor is coaxially arranged around the inner conductor, the inner conductor comprises a first inner conductor and a second inner conductor which are oppositely arranged in the axial direction, the end, away from the second inner conductor, of the first inner conductor is configured to receive radio frequency electromagnetic energy, and the power of the radio frequency electromagnetic energy tends to be increased. And the linear driving mechanism is connected with one end, far away from the first inner conductor, of the second inner conductor, and is configured to drive the second inner conductor to periodically reciprocate along the axial direction, so that the second inner conductor and the first inner conductor are periodically disconnected or connected. And the processing circuit is configured to take the power of the radio frequency electromagnetic energy corresponding to gas explosion as a power safety threshold. According to the invention, data support can be provided for safe operation of the coaxial cable in practical application.

The invention relates to the technical field of optical cable line external force damage monitoring, and discloses an optical cable external force damage intelligent identification system. The system comprises an optical fiber vibration sensing module, a multi-source feature fusion analysis module, an abnormal event association positioning module and an intelligent checking strategy generation module. The optical fiber vibration sensing module constructs a model based on historical data and outputs a reference vibration characteristic value; the multi-source feature fusion analysis module performs three-dimensional fusion analysis of time domain, frequency domain and phase on the reference value and the measured value to generate a feature difference matrix; the abnormal event association positioning module is used for generating an abnormal probability distribution cloud picture and positioning an abnormal area in combination with the topological parameters and the environment information; and the intelligent checking strategy generation module configures checking parameters according to the cloud picture, starts high-frequency acquisition for a high-probability region, and applies an environment disturbance test to adjacent lines. The system can accurately identify and position optical cable external force damage, and the monitoring efficiency is improved.

The invention discloses a cable eccentricity online monitoring method based on multi-point laser ranging, and relates to the technical field of cable manufacturing and detection, and the method comprises the following steps: twelve laser displacement sensors are uniformly arranged at the periphery of a cable core to be detected, the sensors are arranged at fixed intervals of 30 degrees, and a closed annular monitoring array is formed; the method is used for synchronously acquiring radial distance data from the surface of the cable core to the inner wall of the insulating layer at each measuring point. Full-circumferential real-time monitoring is achieved through the high-density laser sensor array, the measurement precision is guaranteed through multi-algorithm fusion and temperature compensation, a closed-loop feedback control mechanism is formed in combination with production equipment, the problems of eccentricity detection blind areas, error interference and manual lag are effectively solved, and the quality consistency and production efficiency of cable manufacturing are improved.

The invention relates to an electric motor (2) for a motor vehicle, comprising a motor housing (4), an electronic unit (8) arranged at the end face of the motor housing (4), wherein a number of phase connections (42, 70, 121) are led from the motor housing (4) into the electronic unit (8), a printed circuit board assembly (34) of the electronic unit (8) as a control unit for the electric motor (2), and a cable harness connection (12) of the electronic unit (8) for a cable harness (10), wherein the cable harness connection (12) is designed for plug-in contact with the cable harness (10).

The invention discloses a cable fault accurate positioning system based on an intelligent sensor system, and relates to the technical field of power fault positioning, and the cable fault accurate positioning system comprises a cloud monitoring center which is in communication connection with the following modules: a signal acquisition and processing module which is used for deploying the intelligent sensor system along a cable, operation environment data and traveling wave signals in the cable operation process are obtained, and the signals are preprocessed and stored in a cloud data warehouse. According to the invention, the front band-pass filter and the self-adaptive trap filter are combined to filter out high-frequency harmonic waves and specific-frequency interference signals, and the differential sampling technology is adopted to counteract common-mode interference, so that the signal-to-noise ratio of the signals is remarkably improved, a system can accurately capture and process weak traveling wave signals caused by a high-resistance grounding fault in a complex environment, and the fault detection accuracy is improved. Therefore, the fault positioning precision is greatly improved, the positioning error caused by signal interference is reduced, and the determination of the fault position is more reliable and accurate.

The invention discloses an anti-bulge photovoltaic cable extrusion molding device with precise positioning, and relates to the technical field of photovoltaic cable production and processing, the anti-bulge photovoltaic cable extrusion molding device comprises an empty shell, a feeding hopper is fixedly mounted at the position, close to the rear side, of the top of the empty shell in an inserted connection mode, a motor is fixedly connected to the rear side of the empty shell, and a rotating rod is fixedly connected to the front side of the motor; by arranging a circular ring plate, extrusion wheels, springs and a hollow plate, when a cable core penetrates into an extrusion mold and needs to pass through the multiple extrusion wheels on one side, the outer wall of the cable core pushes the multiple extrusion wheels, the extrusion wheels drive corresponding movable rods to move, and the movable rods drive clamping blocks to move and compress the corresponding springs at the same time; the multiple springs are used for applying elastic force to the corresponding extrusion wheels, so that the multiple extrusion wheels are attached to the outer wall of the cable core, the movement track of the cable core is preliminarily limited, and the problem that the cable core deviates, and consequently the core of a subsequently-formed photovoltaic cable is exposed is effectively solved.

The utility model discloses a low-voltage cable branch box suitable for indoor use, and relates to the technical field of cable branch boxes. The low-voltage cable branch box suitable for indoor use comprises a cable branch box, wherein the inner bottom surface of the cable branch box is fixedly connected with a fixed shell, and the interior of the fixed shell is slidably connected with a sliding rod 2, and the end of the sliding rod 2 located outside the fixed shell is arranged in an inclined state, and the end of the sliding rod 2 located inside the fixed shell is fixedly connected with a clamping plate. The low-voltage cable branch box suitable for indoor use can close the cable line by opening and closing the cabinet door, thereby preventing the external humid air from entering the interior of the cable branch box and damaging the components inside the cable branch box, and protecting the switches and other equipment inside the cable branch box, thereby ensuring the normal use of the equipment and avoiding the situation where the equipment is damaged due to moisture and needs to be repaired.

The invention provides an adaptive stochastic resonance weak fault detection method based on kurtosis optimization, and belongs to the technical field of fault detection, and the method comprises the steps: collecting and preprocessing a transient signal on a cable line; constructing a bistable stochastic resonance model; kurtosis of the output signal is used as a fitness function, and potential well parameters of the bistable stochastic resonance model are optimized based on a particle swarm optimization algorithm; and substituting the optimized potential well parameter into the bistable stochastic resonance model, and processing the preprocessed transient signal to obtain an enhanced output signal for fault detection. The method has the beneficial effects that the stochastic resonance system is constructed on the basis of the classical bistable model, the kurtosis of the output signal is used as the fitness function of the particle swarm optimization algorithm, the potential well parameters are adaptively optimized, the potential well parameters are driven to automatically converge to the optimal state, and the robustness of the system is improved. The high-impedance grounding fault traveling wave signal can be extracted and enhanced from a strong noise background, and the detection sensitivity and reliability are improved.

The invention discloses an outdoor cable terminal tail pipe lower insulation latent fault early warning method, which fully considers the characteristics of an insulation outer shielding layer semi-conductive material caused by temperature rise after a cable terminal lead seal is completely cracked, and accurately obtains grounding current data at different cable terminal temperatures as input data. Building a terminal grounding current calculation model after the lead seal of the tail pipe of the cable terminal is completely cracked, and building a cable terminal temperature field distribution calculation model considering heat-flow coupling, so as to form an iterative algorithm for the steady-state temperature field distribution in the tail pipe of the cable terminal in a state that the lead seal is completely cracked; outdoor cable terminal tail pipe latent fault early warning based on the tail pipe abnormal temperature rise signal is achieved, the defect that steady-state temperature distribution calculation after lead sealing is completely cracked is not established in an existing system is overcome, the accuracy of terminal fault defect detection based on the temperature rise signal can be improved, and finally the purposes of reducing the maintenance cost, improving the cable line operation reliability and improving the service life are achieved. And the goal of constructing a smart power grid is promoted.

In one aspect the subject matter herein describes a cable tilt actuator for an aircraft propulsion unit. One embodiment comprises: a cable spool, fore and aft cable sections, a compression beam, a compression beam guide, and a linear actuator. As the linear actuator drives the compression beam, relative rotation is imposed between the compression beam and the spool. Described, in one aspect, is an embodiment configured to tilt an aircraft propulsion unit.

The invention discloses a cable harness detection device, and relates to the field of harness detection equipment, the cable harness detection device comprises a support frame and further comprises a pay-off reel, a movable frame is arranged in the support frame, a fixed rod and a guide rod are arranged in the movable frame, a support block is arranged at the center of the fixed rod and the guide rod, the pay-off reel is arranged at the top of the support block, and the pay-off reel is arranged at the bottom of the support block. A movable plate is arranged in the pay-off reel, a wire winding shaft is arranged on the movable plate, a mounting rod is arranged on the side wall of the pay-off reel, a pressing plate is arranged on the mounting rod in a sliding mode, a guide rod is sleeved with a sleeve in a sliding mode, a wire is connected with detection equipment through a connecting wire, and clamping blocks are close to each other and fix a wire connector. And the adjusting rod adjusts the position of a wire joint by driving the clamping blocks to move, and the wire joint is aligned with the clamping blocks connected with the two ends of the same wire, so that subsequent cable harness detection is facilitated.

The invention discloses a high-voltage cable line operation state inversion method and system, and relates to the technical field of high-voltage cable line supervision, and the method comprises the steps: collecting the structure, size and material parameters of a cable accessory, and building an electromagnetic thermal multi-physical field simulation model of the cable accessory and the defect of the cable accessory; establishing a multi-physical field simulation model of the cable buffer layer and the defects thereof; establishing a multi-physical field simulation model and a field-circuit coupling model of an electromagnetic field, a temperature field and a flow field of the cable tunnel; obtaining an actual measurement value of a cable line state parameter, comparing the actual measurement value with a simulation result of large-scale and local defects of a cable tunnel space, and correcting the model according to a comparison result; and inversion of tunnel cables and typical defect faults of the cables under different working conditions is realized. According to the method, cable overall operation state simulation and typical defect simulation are integrated to realize simulation reproduction and defect inversion of a cable line state.

The invention relates to the technical field of cable performance detection, and particularly provides a cable tensile property testing device. Comprising a test bench, the test bench is provided with a cable fixing frame, and the test bench is provided with a force application assembly used for applying a vertically downward traction force; and a plurality of stretching execution mechanisms for carrying out stretching tests on the plurality of cables are fixed on the force application assembly. According to the device provided by the invention, a mode that multiple cables in the same batch and multiple test stations uniformly apply force is adopted, accidental random errors of testing are greatly reduced, flexible fitting, pressing and stretching are carried out on the cables through the stretching execution mechanism, the uniformity of stress distribution is improved, stress concentration is avoided, and the testing efficiency is improved. An anti-tilting clamping design is adopted, so that the uniformity of the test direction is enhanced; besides, the electrical performance test can be synchronously carried out while the structural performance test is carried out in the bending and stretching process, so that the test comprehensiveness is ensured.

The invention discloses an offshore wind power cable line fault early warning method and system, and relates to the technical field of cable line fault early warning, and the method comprises the following steps: laying a three-dimensional distributed optical fiber temperature array along an offshore wind power cable, and monitoring the cable thermal field space distribution in combination with an active acoustic dispersion imaging technology; acquiring initial evolution trajectory data of the edge high-temperature region; and on the basis of the initial evolution trajectory data, constructing a coupling relationship among the ocean current parameter, the sediment disturbance characteristic and the cable heat conduction parameter, forming an ocean current-sediment-heat conduction coupled digital twin model, and dynamically correcting a virtual scene of the cable burial depth in the model through a recursive filtering algorithm. Through combination of thermal field monitoring, digital twin modeling and intelligent intervention, accurate early warning and dynamic response of offshore wind power cable faults are realized, the operation and maintenance efficiency is improved, system self-optimization and cross-scene migration are supported, and the safety and intelligent level of cable operation are significantly enhanced.

The invention discloses a cable defect detection device and method. The detection device comprises a high-frequency current sensor, a signal acquisition module, an algorithm analysis module, a high-frequency pulse detection module and a fault diagnosis module, the high-frequency current sensor is used for detecting a current pulse signal on a cable grounding wire, converting the current pulse signal into a voltage signal and transmitting the voltage signal to the signal acquisition module; the signal acquisition module is used for amplifying, filtering and detecting the voltage signal; the algorithm analysis module is used for carrying out feature extraction and analysis on the processed voltage signals and carrying out feature classification and clustering on the voltage signals; the high-frequency pulse detection module is used for carrying out noise reduction processing on the voltage signal and extracting the voltage signal representing the partial discharge defect of the cable; and the fault diagnosis module is used for determining the type and degree of the cable defect according to the voltage signal representing the partial discharge defect of the cable and historical data. Cable line faults are rapidly judged, and the reliability of a power supply system is improved.

An optical cable online operation and maintenance situation intelligent assessment method relates to the technical field of data processing, and comprises the following steps: obtaining physical parameters along an optical cable, and carrying out statistical analysis on the physical parameters to obtain a stability coefficient of the physical parameters along the optical cable; constructing a spacing distance comparison table, and laying Internet of Things monitoring nodes along the optical cable according to the stability coefficient of the physical parameters along the optical cable and the spacing distance comparison table; performing real-time monitoring on physical parameters and network performance indexes along the optical cable, and generating an abnormal alarm signal or performing situation analysis along the optical cable according to a monitoring result; when optical cable line situation analysis is carried out, feature extraction is carried out on physical parameters and network performance indexes in a historical acquisition period along an optical cable in advance, a state estimation model is constructed according to a feature extraction result, and estimation marking is carried out on a current acquisition period according to the state estimation model. The optical cable along the line is detected in advance according to a pre-estimation marking result, and the safety and reliability of an optical cable network are remarkably improved.

The invention relates to an anti-slip multi-frequency damper, and relates to the technical field of power overhead line and cable construction, the anti-slip multi-frequency damper comprises a wire clamp body, a plurality of wound pre-twisted wires are arranged in the wire clamp body, an anti-vibration assembly is arranged below the wire clamp body, two ends of each pre-twisted wire are provided with preassembled sheets, and the preassembled sheets are provided with clamping assemblies. The clamping assembly is used for connecting and fixing the two ends of the pre-assembled piece to form a pre-assembled ring, the pre-assembled ring is arranged outside a plurality of wound pre-twisted wires in a sleeving mode, a plurality of connecting blocks corresponding to the pre-twisted wires in number are arranged on the inner wall of the pre-assembled ring, a pre-assembled groove is formed between every two adjacent connecting blocks, and the pre-twisted wires are clamped in the corresponding pre-assembled grooves. According to the invention, the pre-twisted wire can be rapidly installed on the surface of the cable by a worker, and the installation speed of the pre-twisted wire is improved.

An audio cable with switchable transmission direction, includes an audio cable line. One end of the audio cable line is provided with a first interface for connecting with an audio device, and other end of the audio cable line is provided with a second interface for connecting with a terminal device. A switch module is arranged at a middle part of the audio cable line. The switch module is electrically connected with the first interface and the second interface. When the switch module is located at a first position, the audio cable line features a function of inputting audio signals from an audio device to a terminal device; when the switch module is located at a second position, the audio cable line features a function of outputting the audio signals from the terminal device to the audio device.

The invention discloses a cable defect detection method of a binocular intelligent inspection robot, and relates to the field of image processing, and the method comprises the steps: firstly obtaining the state information of a cable, then carrying out the preprocessing and stereo matching of the image information of the cable, and then constructing a target detection and segmentation model; the target detection and segmentation model is adopted to detect and segment cable defects, and model sample data is updated in real time in an incremental learning mode; fusing the cable state information acquired by the infrared camera, the thermal imager and the wireless sensor network by using a multi-sensor data information fusion model; the cable is maintained and managed based on a detection result; according to the invention, the detection precision and accuracy can be improved, cables of different types and specifications can be handled, the adaptability and stability are ensured, and the real-time performance and accuracy of detection can be improved.