62results about How to "Accurately locate faults" patented technology

The invention discloses a method for fault component-based wide area backup protection, which belongs to the field of relay protection for electric power systems. The method comprises the following steps of: when a power network is in normal operation, dividing protection associated domains according to a topology structure and the PMU configuration of a network; updating the protection associated domains in real time by adopting a heuristic search technique according to switch transposition information; when a fault happens, extracting fault stable-state components of current and voltage, and defining fault associated domains according to the fault stable-state component of differential current in each associated domain; and calculating fault associated factors in the associated domain in real time to determine fault branches. The method can accurately position the faults under a condition with PMU limited measuring points, is not influenced by the system operation mode, avoids the condition that the conventional backup protection can have mismatching or insufficient sensitivity very easily, is not influenced by load current, and has very high reliability.

The present invention provides a MIPS-architecture-based CPU outlier location diagnosis method which including the following procedures: machine codes of a present function is scanned; a migration in instructions on constructing a function stack is analyzed and a function stack pointer of an invoking function is computed; the migration in the storage function of a return address is analyzed, the storage location of the return address in the function stack of the present function is computed and the return address is received. The function stack pointer of the call function and the return address obtained according to the present invention can output a call relation of the present function so as to locate and diagnose failure.

The invention provides a method for rapidly diagnosing unmanned helicopter sensor faults. The method is characterized in that an estimated value of a full-dimensional robust observer is compared with actual values measured by sensors to generate residual errors, decision-making analysis is carried out on the residual errors with a sequential likelihood ratio criterion, and the system faults are accordingly detected; meanwhile, a series of parallel dimensionality reduction robust observers are built for the sensors participating in signal feedback to achieve decoupling on output signals, then the output signals of the sensors are compared with estimated values of the dimensionality reduction robust observers, and the sensor with the maximum residual error deviation is a fault sensor. The types of the faults are rapidly determined by fault types of multi-sensor D-S data fusing algorithms.

The invention discloses a low-voltage power distribution network fault positioning system and method based on topology dynamic identification. The system comprises a data acquisition and transmission layer, a fault positioning layer and an application layer. Wherein the user meter box data acquisition module and the branch box data acquisition module respectively acquire data and upload related fault information; the fault positioning module is used for sending related instruction notifications to the branch box data acquisition module and the user meter box data acquisition module, obtaining data information, operation state data of all lines of the low-voltage power distribution network and user electric energy meter data, evaluating node stability in a topological structure of the low-voltage power distribution network, selecting a shortest path, judging a fault reason, and sending the fault information to the branch box data acquisition module and the user meter box data acquisition module. Positioning the position of a fault node by using a fuzzy correlation threshold value between the nodes; and finally, the fault positioning information is uploaded to a cloud platform, and the fault information is transmitted to a user and working operation and maintenance personnel, so that the working personnel can quickly and accurately find out the faulted equipment or line, and repair the faulted equipment in time.

The invention discloses a load state detection method, device and circuit and a conditioner controller. The method comprises: acquiring load execution time; determining a load execution moment according to a moment when a load receives an execution command and the load execution time; acquiring power supply bus current or power supply bus voltage respectively before and after the load execution moment; judging whether working state of the load is normal according to comparison results of the power supply bus currents before and after the load execution moment, or comparison results of the power supply bus voltages before and after the load execution moment. After a conditioner controller device fails, the fault can be quickly and accurately located, and solid basis is laid for finding a perfect solution. The load state detection method, device and circuit and the conditioner controller enable manpower and material resources to be greatly reduced and allow aftersales quality to be improved.

The invention discloses a log file processing system and method. The processing system comprises a trunk process information file module, a read-write monitoring information file module and an analog quantity real-time acquisition information file module; the trunk process information file module is used for recoding process information of system testing; the read-write monitoring information file module is used for monitoring input-output information of a specified read-write interface; and the analog quantity real-time acquisition information file module is used for recording analog quantity real-time acquisition information in a testing process. The log file processing method provided by the invention adopts a monitoring pointer to indicate the quantity of log files in a buffer area; when the quantity of the log files exceeds a threshold, then the buffer area is reset, so that the problem of memory overflow caused by the continuous accumulation of log files can be solved; besides, a time label is added on each test record to indicate the time of failures, so that the failure information can be accurately and efficiently positioned.

The invention discloses a power battery fault display method and device. The power battery fault display method comprises the following steps: a BMS(battery management system) detects whether a battery system has faults, fault flags are encoded, codes are integrated into an array, fault information is formed, and fault recording is performed; the fault information is sent; the fault flags are queried according to fault codes; the fault flags are displayed. The faults can be positioned precisely, later checking and positioning of each fault are facilitated, and vehicle maintenance is facilitated.

The invention discloses an active power distribution network fault positioning method based on an improved particle swarm. The method comprises the steps of offline region division and online fault positioning, wherein the step of offline region division comprises the substeps that a network topology structure is formed according to an existing measuring device in a distribution network, power distribution network region static division is performed from the aspects of economy, reliability and risk; 2, considering DG access, a novel evaluation index is built for performing distribution network region dynamic adjustment of the DG access; the step of online fault positioning comprises the substeps that 1, according to fault information of a region boundary node, redundant information processing is performed, and an invalid region is removed; 2, variable optimization is performed on the processed fault information; 3, the improved particle swarm optimization is adopted for performing global fault positioning. According to the region division and the improved particle swarm optimization, positioning of the fault region is achieved, and the fault positioning problem of a power distribution network containing a distributed power source can be efficiently and accurately solved.

The invention discloses a fault traveling wave locating device for a power line, relating to the technical field of protection devices of power systems. The fault traveling wave locating device for the power line comprises a traveling wave ranging device, an oscillograph and a background computer, wherein the traveling wave ranging device and the oscillograph are connected with the background computer through an Ethernet, and the traveling wave ranging device and the oscillograph are communicated with a GPS (global positioning system). Due to the combination of the fault recording function and the traveling wave locating function, the locating device can locate the fault accurately; and the traveling wave ranging device and the oscillograph are integrated into one screen cabinet from the original two individual screen cabinets, so that the device size can be reduced, the area of a control room can be reduced, the installation and commissioning process can be simplified, a secondary loop cable can be wired simply, the wiring error probability and the workload can be reduced, the shared equipment can be saved in hardware, and the fabrication cost is low.

The invention provides equipment and a method for detecting a theftproof controller, belongs to the technical field of locking and theft prevention of automobile engines, and aims to solve the problem that the theftproof controller cannot be detected independently during production of a whole automobile. The equipment for detecting the theftproof controller comprises a key simulation unit for simulating a key to send authentication information to the theftproof controller, an engine control simulation unit for simulating mutual authentication between an engine control module and the theftproof controller, a result output unit for outputting a detection result, and a connection end which is connected with the theftproof controller. The method for detecting the theftproof controller comprises the following steps of: connecting the theftproof controller and a connection end of the equipment for detecting the theftproof controller; authenticating the key simulation unit of the equipment for detecting the theftproof controller by the theftproof controller, and mutually authenticating the theftproof controller and the engine control simulation unit of the equipment for detecting the theftproof controller; and outputting the detection result by the result output unit of the equipment for detecting the theftproof controller according to authentication results.

The invention relates to a trackside equipment monitoring and intelligent diagnostic system for a ZPW2000 track. The system comprises an outdoor collection sub-machine, a PLC-485 protocol converter and power supply integrated machine, an outdoor monitoring communication processor, a railway signal concentrated monitoring system and a ZPW 2000 maintenance system, wherein the outdoor collection sub-machine is connected with the outdoor part of the ZPW 2000 track circuit, the PLC-485 protocol converter and power supply integrated machine is connected with the outdoor collection sub-machine, the PLC-485 protocol converter and power supply integrated machine is connected with the outdoor monitoring communication processor, and the outdoor monitoring communication processor is connected with the railway signal concentrated monitoring system and the ZPW 2000 maintenance system. Compared with the prior art, the system provided by the invention has the advantages of being capable of accurately positioning faults, intelligent analyzing fault causes, and helping maintenance personnel solve actual problems.

The invention provides an elevator traction machine failure judgment method and system based on a current monitoring technology. The system comprises a current sensor, a signal box, a collection board, a data transmission gateway and a cloud platform server, wherein the current sensor is connected with the output end of a frequency converter of a traction machine; and the cloud platform server isprovided with a service interface for accessing a webpage or APP. The method comprises the following steps of acquiring real-time current data output by the frequency converter of the traction machine, and processing and converting the real-time current data into a corresponding current value; comparing the obtained current value with a preset running threshold, judging that an overcurrent failureoccurs when the obtained current value exceeds the running threshold, and feeding an overcurrent failure code to the cloud platform server; performing phase detection when no overcurrent failure occurs, and feeding the phase failure code to the cloud platform server when a phase failure occurs; and matching with corresponding failure description information by the cloud platform server accordingto the failure code, displaying the failure description information to the webpage or App.

The application discloses a fault type display method and device. The method comprises the following steps: detecting the state information of at least one component in the equipment; determining thefault type information of the at least one component according to the state information, wherein the fault type information includes a secondary system to which the at least one component belongs, anda primary system to which the secondary system belongs; and displaying the fault type information. The application solves the technical problem of low equipment fault diagnosis efficiency of the current stage.

The invention discloses an electric drive system power tube open-circuit fault tolerance control method. According to the method, whether a fault occurs is judged through a mathematical model of greyprediction, then current values at a time of 3T / 4 and a time of T / 2 from the beginning of the fault are detected to judge the position of the fault, and finally fault-tolerant operation of an electricdrive system is achieved by adopting a corresponding control strategy according to the position of the fault. According to the invention, the method has the advantages of being high in reliability, high in diagnosis speed, not prone to misjudgment and free of extra sensors, can achieve fault tolerance control of the system in eight different power tube open-circuit fault states by controlling aninverter and a bidirectional thyristor, and has high fault-tolerant capacity.

The present invention discloses an intelligent television-based information collection method and system. The method comprises the steps of upon detecting the switching-on state of an intelligent television, acquiring the operation information generated during the operation of the intelligent television; judging whether the operation information contains the operation wrong information or not; if yes, storing the corresponding operation information in a first local storage area; if not, storing the corresponding operation information in a second local storage area; after the intelligent television is switched on again and successfully networked and the information in the first and second local storage areas is updated, sending the stored content in the first and second local storage areas to a background server; and automatically classifying the received operation information according to a preset rule by means of the background server. According to the technical scheme of the invention, based on the network channel of the intelligent television, the state information of the television is automatically uploaded to the backend server, and then is automatically classified by the background server. Therefore, the maintenance efficiency is improved. The method and the system are accurate in fault positioning effect and shorten the maintenance time. Therefore, a fault can be timely repaired.

The invention discloses a concentrated operation system of a photovoltaic power station and hardware configuration of the system. The concentrated operation system of the photovoltaic power station comprises a guiding module, a real-time monitoring module, a defect closed-loop processing module, an equipment analysis module, a benchmarking management module and a form customization module. Hard configuration of the system comprises a distributed station power generating system, a forwarding device, the photovoltaic power station concentrated operation system, a master station information center and a station switch, the distributed station power generating system is in communication connection with the forwarding device, the photovoltaic power station concentrated operation system, the master station information center and the station switch successively, the master station information center is in communication connection with an Internet terminal of a group user, the station switch is in communication connection with an Internet terminal of a station-end user as well as with the Internet firewall, and the Internet firewall is in communication connection with an application serverand a database server. The system and hardware configuration thereof have the advantages including that operation is concentrated, the operation cost is reduced, monitoring of the system is in real time, and shortcomings are eliminated timely.

The invention discloses an information network patrol instrument. The patrol instrument comprises a processor, a battery power supply detection module, a temperature detection module and an LCD (liquid crystal display), wherein the processor is connected with the battery power supply detection module through a GPIO (general purpose input / output) port, connected with the temperature detection module through an IO port, connected with the LCD through an SPI (single peripheral interface), connected with a concentrator station through a network interface, connected with a short message modem through a USB interface or a USB-to-serial port module to perform short message data communication with a central platform through the short message modem, connected with a network switch through a serial port and also connected with a network port of the network switch through a network interface.

The invention discloses a virtual machine creating method and a device for virtual machine creation. The virtual machine creating method includes invoking virtual machine creation steps and performing the invoked virtual machine creation steps, wherein after every time an invoked virtual machine creation step is successfully performed, the next virtual machine creation step which needs to be invoked is determined based on a predetermined sequence of the virtual machine creation steps. According to the virtual machine creating method and the device for the virtual machine creation, each virtual machine creation step is invoked separately, after the invoked virtual machine creation step is performed successfully, the next virtual machine creation step is invoked, and therefore a fault can be located accurately, the situation that all the steps need to be preformed again in the case of a creation failure is avoided, and efficiency of the virtual machine creation can be improved; and moreover, even when a virtual machine creating process needs to be adjusted, only a part of the steps needs to be amended, workloads can be effectively reduced, the complexity in the virtual machine creation process is lowered, and maintainability and scalability can be improved.

The invention discloses a fault positioning method, system and device and a computer readable storage medium. The transmitted data transmitted on an optical fiber link of FC SAN can be transmitted toa built-in chip of an HBA card in real time, and an I / O data analysis program of the built-in chip is used for performing the statistical analysis of the reading / writing parameters of an upper layer SCSI in the transmitted data to obtain a statistical analysis result, and writing the statistical analysis result into a database. Because the analysis and statistical operation of the transmitted datatransmitted on the optical fiber link are performed in real time, and the data is recorded in the database in real time, the recorded time interval of the statistical analysis result is very small, thereby shortening the positioning period of the reading / writing fault of the upper layer SCSI, and achieving the more precise positioning of the fault. Moreover, the data written into the database isthe statistical analysis result of the reading / writing parameters of the upper layer SCSI. Because the recorded data is the parameters and the analysis result of the parameters, the problems can be found more visually and easily.

The invention provides portable airplane communication navigation system detection equipment. A radio frequency signal analysis assembly, a radio frequency signal generation assembly, a control assembly and the like are arranged in a body. The radio frequency signal analysis assembly comprises a standing wave analysis module, a power / frequency analysis module, a 30dB attenuator, two radio frequency input ports and a radio frequency output port. The radio frequency signal generation assembly comprises a radio frequency module, a programmable attenuator, a communication signal output port and anavigation signal output port. The control assembly comprises a main control unit, a touch display and the like. The invention further provides a detection method of the aircraft communication navigation system. The method aims to solve the technical problems that hidden faults of an external field communication system cannot be found, the number of first-line maintenance support devices of a navigation system is large, and a compass cannot be checked due to the fact that compass signals cannot be received in a machine shed and a machine fort. One-line in-situ performance detection of communication equipment such as a short-wave radio station, an ultra-short-wave radio station, a filter, a power adapter, an antenna and the like can be quickly completed, and the equipment and method are suitable for checking communication navigation equipment of various models.

The invention provides an elevator car door machine fault judgment method and system based on a current monitoring technology. The system comprises a current transformer, a collection board, a monitoring platform and terminal equipment. The method comprises the steps of acquiring real-time current data of a car door machine and processing and converting the real-time current data into a corresponding current value so as to generate monitoring data, and uploading the monitoring data to the monitoring platform; meanwhile, judging the obtained current value according to a preset rule, and when itis judged that a fault occurs, generating a corresponding fault code and uploading the fault code to the monitoring platform, wherein the monitoring platform is provided with fault description information corresponding to the fault code; when the fault code is received, matching the fault code with the corresponding fault description information, and then displaying the fault code and the fault description information; and providing an information sharing interface which is used for allowing the terminal equipment to have access to and transmitting the real-time monitoring data, the fault code and the corresponding fault description information to the terminal equipment by the monitoring platform.

The invention discloses an error detection method and system of a network card device. The error detection method comprises the steps of domain name system detection in which a valid target domain name server is determined and whether the target domain name server can be accessed is determined; router detection in which a route detection table is obtained, target data in the route detection table is extracted, and whether the network is connected is determined according to the target data; and network data interface detection in which whether a network data interface can obtain an error data packet is determined. Thus, different parts of the network card device can be detected in one step in a targeted manner, faults can be accurately located, troubleshooting can be implemented conveniently according to the faults, and hidden trouble of network errors can be effectively avoided.

The invention discloses a fault-tolerant control method for an open-circuit fault of an electric drive system based on gray prediction theory. This method first uses the mathematical model of gray prediction to predict the current value at the next moment, and then uses the gray prediction open circuit fault diagnostic device to make a difference between the predicted data and the original data and compare it with the set threshold to determine whether there is a fault and The position of the faulty winding is judged by the feedback fault signal, and finally the winding open circuit fault processor adopts the corresponding control strategy according to the fault position to realize the fault-tolerant operation of the electric drive system. The invention has the characteristics of high reliability, fast diagnosis speed, no misjudgment, no need for additional sensors, and the fault-tolerant control of the system in eight different winding open-circuit fault states can be realized by controlling the inverter and the bidirectional thyristor. Has strong fault tolerance.

The invention relates to a comprehensive fault diagnosis system suitable for a 35 kV transformer of a wind power plant. The system is characterized by comprising an acquisition module, a judgment module and a diagnosis module, wherein the acquisition module is used for obtaining contents of various dissolved gases in transformer insulating oil on the basis of an insulating oil chromatographic analysis detection result, wherein dissolved gases include C2H4 and C2H6; the judgment module is used for judging whether super-standard items exist or not is judged according to the contents of the dissolved gases in transformer insulating oil and generating a judgment result; the diagnosis module is used for fault diagnosis through a three-ratio method and a ratio-free method under the condition that the super-standard items exist, and if codes cannot be found when the three-ratio method is used for fault diagnosis, the result of the ratio-free method serves as the standard; meanwhile, whether C2H4 / C2H6 is larger than 3 or not is judged, and if yes, a TD graph method is used for comprehensive analysis diagnosis to obtain a diagnosis result. According to the system, staff of a wind power plant can quickly and accurately locate faults of a wind power box, the operation and maintenance cost is reduced, and the operation reliability of the wind power plant is improved.

The invention discloses a distributed parallel Skyline inquiring method based on a cloud computing environment, aiming at effectively preventing a node failure from influencing inquiring and processing processes of the distributed parallel Skyline. The technical proposal comprises the steps as follows: firstly, the clouding computing environment which consists of a portal node and N computer nodes is constructed, wherein a task management program and a result recovery program are arranged on the portal node, an inquire processing program and a fault processing program are arranged on the computer nodes; the portal node executes the task management program and transfers the Skyline inquiring request to each computer node; each computer node executes the inquire processing program and implements Skyline inquire processing; each computer node executes the fault processing program, and periodically detects and repairs the fault for the neighbor nodes; the portal node executes the result recovery program, collects a Skyline set of all the computer nodes, gathers the Skyline set and returns the Skyline set to users. By adopting the invention, the influences to the inquire processing process of the distributed parallel Skyline caused by the node failure can be effectively controlled, and high efficiency, reliability and accuracy of the Skyline inquire processing can be guaranteed.

An automatic detection system for faults of a main control assembly and a management control assembly in a launch control system comprises an adaptation device for the main control assembly and the management control assembly, a main control assembly automatic test program set for testing faults of the main control assembly, a management control assembly automatic test program set for testing faults of the management control assembly, and a host computer installed with the automatic test program sets, wherein the adaptation device comprises a testing single-chip microcomputer and an adapter box provided with a hardware resource switching over function. The automatic detection system has the advantages that the problem of low efficiency of conventional manual fault detection is solved; the adaptation device is adopted for providing a hardware resource, and the automatic test program sets for testing the faults of the main control assembly and the management control assembly are developed independently, so that the testing efficiency of the automatic detection system is high, and the faults can be located accurately.

The invention discloses a fan fault inversion method and system based on 3D simulation and panoramic time series data sampling, and the method comprises the following steps: obtaining the measurementdata of a fan, and storing the measurement data of the fan in a time series database at the same time interval according to the time sequence; obtaining inversion starting and ending time of historical fault events of the fan; querying all measurement data of the fan in the inversion starting and ending time periods from a time sequence database, and generating a section data stream with continuous time; and driving the fan 3D model to perform simulation by taking the section data flow with continuous time as a data source so as to display the whole running state process before and after the historical fault of the fan occurs.

An embodiment of the invention relates to the technical field of communication, and discloses a network element fault positioning method and device, computing equipment and a computer storage medium.The method comprises the steps: constructing a simulated public data network gateway, and enabling the simulated public data network gateway to be connected to a long-term evolution voice bearing network; determining a relationship between any test number in the test data and the network element; aiming at any test number, deploying a test task and a test path according to the relationship betweenany test number and the network element and the network topology condition of the long term evolution voice bearing network, and obtaining alarm information; positioning a fault network element according to the test path of the test task and the alarm information. By means of the mode, the VoLTE IMS domain network element fault early warning method and device can rapidly find out the VoLTE IMS domain network element fault which is actively warned and accurately positioned in a fault hidden danger mode, prevent alarm missing and false alarm, and improve the VoLTE network quality.

A diagnosis and early warning device of faults of mine explosion-proof dry type transformers comprises a microprocessor unit, a sensor unit, a signal conditioning unit, a data acquisition unit, a data storage unit and a communication unit, wherein all the units adopt voltage and current transformers and temperature, current and pulse current sensors to obtain signals; the signal conditioning unitis used for converting the output signals of the voltage and current transformers and the temperature and current sensors to the signals with voltage within 0-3V and converting the output signals of the pulse current sensors to the signals with voltage within minus 2-2V; the data acquisition unit and the microprocessor unit are used for carrying out data acquisition and processing on the output signals of the signal conditioning unit; the data storage unit is used for realizing real-time storage of the data; and the communication unit supports compatible integrated connection of the device and the monitoring network and is used for centralized data processing, characteristics analysis and resource sharing. The device has overall monitoring parameters and simple structure and can ensure continuity, reliability and safety of mine production.