410results about "Line-transmission monitoring/testing" patented technology

An interface circuit includes a reference voltage generation circuit to generate a reference voltage, a differential voltage signal generation circuit to convert send data input in sending data into a pair of differential voltage signals and output the pair of differential voltage signals based on the reference voltage generated by the reference voltage generation circuit, a receiver to convert a pair of differential voltage signals input in receiving data and output received data, and a receiver test circuit to perform a sensitivity test of the receiver, the receiver test circuit having a resistance circuit to generate a pair of differential voltage signals having a potential difference being necessary for the sensitivity test of the receiver.

The invention provides an intelligent electric meter HPLC communication module dynamic calibration method suitable for environmental disturbance, and relates to the technical field of dynamic calibration, and the method comprises the steps: collecting multi-source data, collecting time sequence communication data of a communication module in real time, and carrying out the analysis to obtain a communication index. Initial calibration parameters are formulated, dynamic adjustment parameters are calculated, and the initial calibration parameters are adjusted according to the dynamic adjustment parameters to obtain real-time operation parameters. And judging whether the current communication index reaches a preset communication threshold, if so, maintaining the real-time operation parameter, and otherwise, optimizing the dynamic adjustment parameter. And analyzing the environmental disturbance data and the power line channel characteristic data to obtain associated influence data, carrying out feature extraction on the current communication index to obtain a communication abnormal feature, and adjusting the dynamic adjustment parameter in combination with the associated influence data to obtain a calibration correction parameter. According to the invention, intelligence and automation of communication module calibration are realized, manual intervention and experience dependence are reduced, and calibration efficiency and accuracy are improved.

The invention relates to the technical field of anti-interference of intelligent monitoring data acquisition of a new energy power station, in particular to a self-adaptive anti-interference system for data acquisition of an intelligent auxiliary monitoring system. A windowing judgment mechanism is formed based on cross-node stage consistency; thirdly, defining participation paths of the data units with different stage attributes in cross-node association analysis, and aligning and screening multi-node data through data consistency management; when the stage consistency window meets a release condition, controlled stage regression processing is performed on the data unit in the unstable stage, so that the data acquisition node gradually enters a unified stage attribute; according to the method, the instantaneous abnormal processing of the interference influence is converted into staged and structured management, and the continuity, consistency and reliability of data acquisition and analysis in a complex power monitoring scene are greatly improved.

The invention relates to the technical field of communication, in particular to an intelligent selection and switching method and system for power line broadband carrier communication channels. According to the method, the multi-modal channel quality basic data including the signal quality modal data, the transmission performance modal data and the interference characteristic modal data are introduced, and a scoring mechanism of the signal stability, the transmission efficiency and the anti-interference capability is combined, so that the comprehensive evaluation precision of the power line communication channel quality is effectively improved; real-time communication state information of upstream and downstream equipment is dynamically obtained through a feedback link, a channel quality score is optimized and corrected, and a communication demand matching degree is comprehensively considered, so that the intelligence and the adaptive capability of channel selection and switching are further improved, and therefore, a comprehensive evaluation index of a communication channel can be monitored in real time, and the communication efficiency is improved. The optimal communication channel is automatically selected or switched according to the evaluation result, so that the stability of the communication quality and the transmission efficiency are ensured, and the reliability of the power line broadband carrier communication system is effectively improved.

The invention relates to the technical field of data lines, and particularly discloses a data line system and a data line for intelligently switching data transmission and charging, and the system comprises a dual-core synchronization management module which is used for enabling dual cores to enter an initial detection state through encryption synchronization signaling when equipment is connected; the asynchronous signal processing module is used for generating state judgment parameters through multi-scale sliding window processing and time-frequency domain feature fusion; the consensus decision arbitration module outputs a backtracking trigger signal through dynamic projection transformation and self-adaptive threshold comparison; the state backtracking recovery module is used for generating a retry instruction with a random delay period based on the historical backtracking success rate and the signal quality evaluation; the safety mode control module is used for identifying dominant features by analyzing historical failure records and switching to a safety operation mode; through distributed dual-core cooperative processing and an intelligent fault recovery mechanism, the technical problems of confusion of protocol stacks and deadlock of a state machine in a complex electromagnetic environment are solved, and the anti-interference capability and reliability of the system are improved.

An electronic device may include transmit path that carries a signal. A reconfigurable signal coupler may be disposed on the transmit path and may include a signal path and a coupled path. Measurement circuitry may use the signal coupler to measure power of the signal. The signal path may be formed from at least a first winding in a first metallization layer. The coupled path may be formed from at least a second winding in a second metallization layer, a third winding in a third metallization layer, and a stack of additional windings surrounded by the first, second, and third windings. The signal coupler may include first and second conductors and a switch between the first and second conductors. Control circuitry may adjust switches in the signal coupler to switch between using the first and second conductors or only the second conductor in the coupled path.

The invention discloses an intelligent bus duct and cable online monitoring system for wireless dual-mode collaborative networking, and the system comprises a data collection and preprocessing module which is used for collecting and preprocessing the monitoring data of a bus duct and a cable; the feature extraction module is used for performing normalization and feature cascade processing on the preprocessed monitoring data to generate monitoring feature data; the data encapsulation and communication module is used for encapsulating the monitoring characteristic data into a standardized data frame and transmitting the standardized data frame through a main communication link; the gateway convergence module is used for generating gateway convergence data; the edge analysis module is used for receiving gateway aggregation data, inputting the gateway aggregation data into an improved MFDFA-XGBoost fusion model for state judgment and outputting a state result; the cloud diagnosis module is used for receiving the state result and the monitoring feature data and generating and storing event records; and the alarm and operation and maintenance module is used for generating alarm information and realizing real-time monitoring and active early warning of the bus duct and the cable.

The invention provides a cable quality detection method and system. The method comprises the steps of applying a multi-band test signal to an input end of a to-be-tested cable in response to detection of completion of production of a current batch of cables, and collecting output response data of the test signal through a sensor array arranged on the to-be-tested cable; constructing a signal attenuation model and a noise distribution model of the to-be-tested cable based on the output response data; performing simulation analysis on the signal attenuation model and the noise distribution model to generate a communication performance predicted value of the cable, the communication performance predicted value including signal integrity, a signal-to-noise ratio and an error rate; and comparing the communication performance prediction value with a preset performance threshold, and if a deviation exists, adjusting boundary condition parameters of the to-be-tested cable and then confirming the communication performance prediction value again until the communication performance prediction value meets the preset performance threshold. According to the invention, the quality consistency and the communication reliability of the cable before leaving a factory are remarkably improved.

The invention relates to the technical field of circuit fault processing, and discloses an automatic identification and remote isolation method for a fault section of a low-voltage distribution line, and the method comprises the steps: building a reference fingerprint database based on channel state information through a central coordination node; monitoring real-time channel frequency response and executing threshold comparison to judge suspected fault points; triggering an active impedance control unit of the terminal agent node to execute controlled perturbation; a transmission line network model is used for calculating a theoretical transmission function variable quantity, fitting analysis is carried out on the theoretical transmission function variable quantity and a measured value, and a physical fault is judged and load interference is stripped through a normalized residual coefficient; calculating a residual drift distance between adjacent nodes based on the topological mapping table to execute differential positioning so as to lock a fault physical interval; and issuing a tripping message, and driving the circuit breaker to execute physical isolation at the power frequency zero crossing point. According to the scheme, on-line fault identification and isolation are realized through active impedance perturbation and distributed residual analysis, and the robustness of fault judgment in a complex load environment is improved.

The invention discloses a noise detection method and device for a dual-mode communication network of a power system. The noise detection method comprises the following steps: acquiring an analog signal transmitted by the dual-mode communication network of the power system in a current detection period and filtering the analog signal; sequentially carrying out signal amplification and analog-to-digital conversion on the filtered analog signal according to a preset sequence of a plurality of preset gain values to obtain a digital signal, carrying out validity verification on the digital signal, and terminating after obtaining a first preset gain value which is verified to be valid; and calculating a noise intensity value of the dual-mode communication network of the power system based on the preset gain value which is verified to be valid for the first time. Through orderly traversal of a preset gain sequence and a first effective immediate stop strategy, orderly matching of effective gains is realized, an ADC signal overflow risk is thoroughly avoided, and complete waveform capture in a strong noise environment is ensured; and meanwhile, traversal times are compressed, and detection time consumption is remarkably reduced compared with a traditional multi-stage gain scheme.

The invention provides a fault information detection method and system for an HPLC communication module, and relates to the technical field of data processing, and the method comprises the steps: 1, collecting physical layer dynamic parameters of a power line carrier signal through a main transmission channel and a redundant transmission channel, comprising carrier signal attenuation, noise interference spectrum density, instantaneous bit error rate and channel impedance abnormal identification; 2, performing multi-dimensional fault feature decoupling on the dynamic parameters of the physical layer to generate a quantitative fault feature set; and step 3, based on the quantized fault feature set, dynamically dividing an interference action range according to spatial correlation between signal attenuation gradient distribution and noise energy. According to the method, the complex interference of the power line is accurately identified and specifically processed, and the reliability and the communication quality of the HPLC communication module are effectively improved.

A fault detection system for detecting a fault condition in a direct current (DC) system. The system may include a DC power transmitter to energize a cable and a DC power receiver connected to the cable. A signal generator at the receiver employs orthogonal frequency division multiplexing (OFDM) and combines symbols for messaging or data communications with redundant symbols dedicated to fault detection. At a signal receiver, the transmitted OFDM signal is used to measure changes in the channel transfer function by monitoring changes in a parameter of the received redundant symbols. The redundant symbols need not be decoded to detect a greater-than-threshold change in the transfer function that is indicative of a fault on the cable.

The invention provides a cooperative identification method and system for a power line communication signal and an arc fault, and the method comprises the steps: firstly, constructing and training a double-flow communication fault sensor comprising a sensing early-warning sub-module and an active sensing sub-module, then carrying out the communication fault sensing based on the double-flow communication fault sensor, generating a communication fault sensing data set, and transmitting the communication fault sensing data set to a server; then, a graph neural network is adopted to carry out fault mode recognition on the communication fault sensing data set, a communication fault mode graph is generated, then, communication fault positioning is carried out based on the communication fault mode graph, a communication fault positioning data set is generated, and finally, actual feedback data of the communication fault positioning data set is obtained. And the system is updated according to the actual feedback data, so that the fault diagnosis rate and accuracy are improved.

The invention provides an IPv6 power line carrier dual-mode communication method and system, belongs to the field of power line carrier communication, and solves the problems that a power line carrier is extremely sensitive to noise, an HRF is easily interfered by the same frequency, but a real-time intelligent prediction or cooperative avoidance mechanism is lacked. The method comprises the following steps: recording a short-term fluctuation trend of a communication error rate of a high-frequency power line carrier communication channel in past N periods at a link layer of the high-frequency power line carrier communication channel through a channel disturbance memory function; recognizing the degradation state of the current high-frequency power line carrier communication channel in combination with a disturbance spectrum recognition model; and when it is determined that the high-frequency power line carrier communication channel is in the degradation state, executing a preset spectrum parameter rollback strategy, and in the spectrum parameter rollback process, establishing a heterogeneous relay path through a high-frequency wireless communication channel to transmit to-be-confirmed key data.

According to the dual-mode direct-connection networking method and system for the terminal and the electric energy meter, the electronic equipment and the storage medium, provided by the invention, the method comprises the following steps: evaluating a terminal side service adaptive link, converting an industrial standard into a quantitative link quality value, dynamically adjusting a link evaluation index weight and a terminal dominant shunting strategy, avoiding master station scheduling time delay, and improving the efficiency of the terminal and the electric energy meter. In a direct connection scene, a metering data acquisition period and a control instruction time delay are ensured to meet index requirements, terminal-ammeter collaborative predictive self-healing, fusion of working conditions and other information are used for predicting link quality and judging the risk of link transmission, and when a fault is triggered, the data when the fault occurs is complementarily transmitted by switching the link, so that the integrity of the data is ensured, and the data transmission efficiency is improved. The link failure reason is traced in combination with the working condition, and the link is repaired according to the tracing result, so that the link repairing speed can be increased, a prediction-self-healing-fault-repairing-optimization complete closed loop is formed, and the reliability and accuracy of long-term operation of the scheme are ensured.

The invention provides an intelligent electric meter interaction method and system based on dual-mode heterogeneous network communication, belongs to the field of power line carrier communication, and solves the problem of communication stability still existing in intelligent electric meter interaction under a dual-mode communication architecture. The method comprises the following steps: under the condition that a link layer of a high-speed power line carrier communication channel detects that a subcarrier-level bit error rate or a pilot signal-to-noise ratio has narrowband abnormality and lasts for a preset number of message periods, loading the link layer of the high-speed power line carrier communication channel through programmable impedance in a maintenance time slot, pilot frequency receiving results are collected under the disturbance condition and the non-disturbance condition, and a reflection mark memory function is formed; the reflection mark memory function obtained by maintaining the time slot each time is extracted and stored, a historical record is formed, and the historical record comprises channel frequency domain reflection coefficient changes and a group delay sequence; and identifying the arrival time of the main reflection component based on historical records, and converting the arrival time of the main reflection component into a suspected abnormal position interval.

The invention discloses a low-voltage power line power frequency communication interference suppression and adaptive demodulation method and system, and the method comprises the steps: firstly, detecting the voltage zero crossing of a power grid in real time, and dynamically calibrating a communication time slot based on an actually measured power frequency, thereby achieving the precise power frequency synchronization; injecting a pilot signal into the synchronous time slot window, and judging line topology mutation through coupling of pilot response and a preset signal-to-noise ratio threshold, thereby completing topology perception and verification; triggering channel reestimation in combination with a topological change result, rejecting fundamental wave and multi-order harmonic interference from channel response of least square estimation, and updating a channel model by adopting a time-varying smoothing algorithm; then, a low-noise time window is determined according to the corrected zero cross point, key data packets are scheduled preferentially, and high-reliability anti-interference transmission is achieved; and finally, dynamically and cooperatively adjusting the transmitting power, the receiving filter and the phase compensation based on the newest channel and topology state to form closed-loop self-adaption. According to the scheme, the intelligent degree is high, and the communication stability and the system maintainability are greatly improved.

The invention discloses a concurrent communication method and system based on a power line carrier communication network, and the method comprises the steps: obtaining service parameters and communication parameters in the power line carrier communication network, and carrying out the priority division of services; after the topology change of the power line carrier communication network is stable, the total number of nodes and the number of agent nodes are obtained, and the topology change time is recorded; calculating network channel evaluation time and a proxy node number threshold value; subcarrier division and distribution are carried out on each service according to service parameters, communication parameters, the total number of nodes and the number of proxy nodes of the power line carrier communication network; and recording a system communication success rate in the network channel evaluation time, calculating an SNR value and an SNR fluctuating value of a subcarrier channel, calculating a subcarrier static distribution time length by combining the system communication success rate, the SNR value and the SNR fluctuating value, and simultaneously communicating each service on the distributed subcarrier. According to the invention, the carrier network communication efficiency and the overall execution efficiency can be improved, and multi-thread processing of different service data among carrier nodes is realized.

The invention relates to the technical field of communication, and discloses a dual-mode communication method based on power line carrier and wireless, which comprises the following steps: S1, when equipment is started, detecting a network environment, and configuring a communication mode with strong signal and high network quality according to a detection result; s2, packaging data to be sent through a corresponding communication mode, and transmitting the data through a corresponding physical layer interface after data packaging is completed; and S3, dynamic data packaging and transmission: a data packaging strategy: dynamically adjusting the data packaging and coding strategy according to a communication mode, and using forward error correction coding for high noise for a power line carrier. Through an intelligent selection mechanism and an environment perception module, the system can evaluate and use the optimal communication path and mode in real time to cope with network conditions with poor stability and changing environment factors so as to improve the stability and reliability of the whole network.

Devices, networks, systems, methods, and processes for determining receiver performance metric of a network device are described herein. A device may utilize one or more error patterns associated with the network device to retrieve one or more symbol errors from the one or more error patterns. The device can determine an error threshold for a segment based on a predefined Bit Error Rate (BER) level for the segment. The device may generate a performance metric for the segment based on the error threshold and the retrieved symbol errors. The device can generate a receiver performance metric based on performance metrics of segments. The device may determine a Code Error Ratio (CER) and can predict a Frame Loss ratio (FLR) associated with the network device based on the CER.

The invention discloses an electric meter intelligent communication detection method and system based on a power line carrier, and relates to the technical field of electric meter communication detection, and the method comprises the steps: collecting the communication data of an electric meter at different time periods, inputting an electric meter communication state dynamic sensing model, analyzing features, and obtaining an initial evaluation result; channel characteristic parameters are calculated by using a carrier channel characteristic dynamic estimation algorithm based on the result, and the channel characteristic parameters are input into a power carrier signal demodulation optimization algorithm to generate an optimized demodulation scheme; signals are demodulated and data are verified according to the scheme, related results are uploaded to an electricity meter communication performance optimization management platform, and the platform evaluates performance and generates optimization suggestions and fault early warning. The system comprises a data acquisition unit, a state analysis unit, a channel calculation unit, a demodulation optimization unit, a data processing unit and a performance management unit which operate cooperatively. The communication state can be dynamically sensed, the channel characteristics can be accurately estimated, the demodulation process can be optimized, the integrated management of the communication performance can be realized, and the accuracy and reliability of the electric meter communication can be improved.

The invention discloses a dual-mode carrier module comprehensive performance application evaluation test system and a test method thereof, and a dual-mode communication simulation unit is used for accessing a to-be-tested dual-mode communication module in a shielding environment, and constructing a reconfigurable virtual communication network; the programmable interference injection unit is used for injecting configurable noise and interference signals into a specified communication link in the virtual communication network; the deepening application simulation unit is used for simulating physical topology and dynamic working conditions of a real power grid; the deepening application simulation unit at least comprises a multi-zone power supply simulation module, a working condition simulation control module and a hardware performance excitation module; and the central control and evaluation unit is used for configuring a test scene, automatically executing a combined test process, collecting and recording multi-dimensional data in a test process and carrying out association analysis and comprehensive evaluation. According to the invention, a simulation test platform with reconfigurable hardware, definable software and integrated test is constructed, and the depth and efficiency of test diagnosis are greatly improved.

The invention relates to the field of communication, and particularly discloses a multi-band communication intelligent main and auxiliary frequency band switching method and system, and the method comprises the steps: measuring the signal-to-noise ratio, bit error rate and interference intensity of a main frequency band and an auxiliary frequency band, recording the original value of an index, and providing data support for quality evaluation; the signal-to-noise ratio, the bit error rate and the interference intensity are normalized, the comprehensive mass fraction is calculated according to the weight, and the higher the fraction is, the better the frequency band quality is; setting a switching threshold value, a hysteresis threshold value and the minimum residence time as a plurality of cycles; when the main frequency band is currently used, if the comprehensive score of the main frequency band is smaller than the difference between the switching threshold and the hysteresis threshold and the score of the auxiliary frequency band is high, the auxiliary frequency band is switched to if the residence time is met; when the auxiliary frequency band is currently used, if the main frequency band fraction is greater than the sum of the switching threshold and the hysteresis threshold and is high, and the residence time is met, the main frequency band is switched back; analyzing the quality trend of a main frequency band by using a sliding window with a plurality of lengths, and if continuous deterioration is predicted, switching an auxiliary frequency band in advance; and if the fractions of the main and auxiliary frequency bands are high, parallel joint transmission is started.

The invention provides a railway tunnel lighting control system and method based on double-link communication, and belongs to the technical field of tunnel lighting control, and the system comprises a central manager, a data concentration manager, a scene controller and an intelligent lighting node. The central manager is used for issuing a dimming instruction and storing feedback node state data; the data concentration manager is used for executing active inspection, fault diagnosis, instruction priority arbitration and link adaptive switching tasks, the data concentration manager and the scene controller perform double-link communication through a first double-link, and meanwhile, the data concentration manager and the scene controller perform double-link communication through a second double-link, so that double-link combined communication of tunnel lighting control is realized. Meanwhile, the centralized data manager actively initiates state query to the intelligent lighting nodes in the jurisdiction range according to a first preset period, node state data is obtained, and active inspection of the intelligent lighting nodes is achieved. According to the invention, the communication fault probability is reduced, and the real-time performance and reliability of railway tunnel illumination control are improved.

Boost is provided. A circuit of a cable modem can be configured to receive, at a first input, a first message from a device over a channel, the channel comprising various subcarriers. The circuit can determine a transfer function associated with each of the subcarriers, the transfer function including an indication of power transfer between the circuit and the device. The circuit can determine, using the transfer functions, a power adjustments corresponding to the subcarriers. The circuit can determine, using the power adjustments, another power adjustment for the channel. The circuit can transmit, at a first output, a second message over the channel, the transmit power of the second message responsive to each of the power adjustments.

The invention relates to the technical field of cable working wells, in particular to a cable working well state monitoring method and system. The cable working well state monitoring method comprises the steps that a monitoring device is established in each cable working well, and each monitoring device comprises an electric power Internet of Things gateway, a monitoring device body and an intelligent well lid; setting one of the power Internet of Things gateways as a master gateway, setting the other power Internet of Things gateways as slave gateways, establishing communication between the master gateway and all the slave gateways, and establishing communication between the master gateway and all the intelligent well lids; and establishing communication among the main gateway, the property management platform and the operation and maintenance terminal, and monitoring all state information through the property management platform. According to the cable working well state monitoring method, the operation state and trend of the cable joint can be effectively evaluated, the workload of cable operation maintenance personnel is reduced, cable accidents are reduced, the risk that a grounding wire, a cross interconnection box, a grounding box and the like are stolen is reduced, and the quality of a power cable and reliable operation of a power system are guaranteed.

A method for detection and localisation of a broken conductor within a Single Wire Earth Return (SWER) power distribution network is provided. The method includes: injecting, from one or more transmitters, a unique and continuous Zadoff-Chu Orthogonal frequency-division multiplexing (OFDM) signal for each transmitter into the network via a coupling circuit. A receiver continuously samples and demodulates the signals to detect the presence of transmitters, wherein detection of a signal is asserted by comparing the averaged cross-correlation signal peak for a particular transmitter and one or more channels in the OFDM scheme designated for estimating noise, as the loss of such signal indicating a broken conductor occurrence. Upon detecting a broken conductor occurrence, the method sends a trip signal to a switching device associated with the receiver to remove power from the system. The method further uses time or frequency reflectometry to estimate the broken conductor location in the network.

A test monitor extracts waveforms from a differential transmission line of an automobile network without disrupting the differential transmission line, and stores the data decoded from the extracted waveforms. The test monitor includes a first input configured to receive a voltage waveform from a voltage probe electrically coupled to the differential transmission line that electrically connects a first ECU device and a second device, a second input configured to receive a current waveform from a current probe electrically coupled to the differential transmission line, and one or more processors configured to receive the voltage waveform and the current waveform and determine a voltage of the first ECU device and a voltage of the second device based on the voltage waveform and the current waveform. The test monitor may be embodied in an FPGA. The test monitor enables monitoring of message transfers across a network in a non-intrusive and non-invasive manner, without the necessity of using a repeater or switch.

The utility model relates to the technical field of cable detection, in particular to cable communication function detection equipment, which comprises a communication cable fault comprehensive detector, the upper end of the communication cable fault comprehensive detector is rotatably connected with a flip cover through a rotating shaft, and the front end of the flip cover is fixedly connected with a display screen for displaying data. The front end of the flip cover is further fixedly connected with a powerful magnetic attraction frame, the upper end of the communication cable fault comprehensive detector is further provided with a mounting groove, the bottom end of the inner wall of the mounting groove is further fixedly connected with a plurality of connecting mechanisms, and a plurality of fixing mechanisms capable of limiting and fixing cable ends are further arranged in the mounting groove.

An operator terminal (10) acquires measurement data representing a characteristic of an optical fiber in a cable (C) connecting plural wind turbines (W), the cable (C) including a power transmission line and the optical fiber, and monitors, on the basis of the measurement data and section information indicating plural cable sections corresponding to locations, the cable (C) for each of the plural cable sections, the locations each being a location where a state of the cable (C) is common.