32 results about "Fault trace" patented technology

Techniques for providing connectivity fault management (CFM) for a multi-tiered network are described herein. In one embodiment, a link trace message (LTM) is received at a provider edge (PE) router and originated from a first Ethernet node and destined to a second Ethernet node, where the PE router interfaces an Ethernet and a multi-protocol label switching (MPLS) network. In response, the PE router initiates an MPLS trace session, including generating an MPLS trace message based on the LTM message to one or more MPLS nodes along a path between the first and second Ethernet nodes within the MPLS network. Subsequently, in response to one or more MPLS trace reply messages from the MPLS nodes of the MPLS network, the PE router generates a first link trace reply (LTR) message and sends the first LTR message to the first Ethernet node over the Ethernet. Other methods and apparatuses are also described.

The invention provides a fault diagnosis and pre-warning system in the oil refining production process and an establishment method of the fault diagnosis and pre-warning system. The method comprises the steps of establishing a multilevel flow model in the oil refining production process, determining a fault propagation path, conducting hazard and operability (HAZOP) analysis on the oil refining production process, determining a plurality of static nodes and a plurality of dynamic nodes, determining the connected relation of the static nodes and the dynamic nodes, establishing at least one alternative model, adopting the dynamic Bayesian network structure scoring mechanism for scoring of the alternative models, determining the alternative model with the highest score as a fault multilevel related model, determining the conditional probability relation between the static nodes and the dynamic nodes in the fault multilevel related model, and establishing a fault diagnosis and pre-warning module. The established fault multilevel related model and the fault diagnosis and pre-warning module have the higher fault propagation and fault tracing and reasoning capability, and accurate diagnosis and timely warning of faults generated in the oil refining production process can be achieved.

The invention discloses a manufacturing system fault tracing method and system based on a digital twin model. The manufacturing system fault tracing method comprises the following steps that A, a digital twin fault tracing mathematical model is built on a simulation platform; b, a visual simulation model of the digital twin of the manufacturing system is built on the simulation platform; c, a digital twinning model of the manufacturing system is built; and step D, all fault propagation paths in the information processing model based on the multi-color set are searched through a breadth-first root search algorithm, and a fault root is found out. The root cause of the fault can be better and faster found, the diagnosability can be improved, and technicians can be assisted in providing reliability improvement measures in a targeted mode.

In a stacked system, errors detected at a user application interface of one or more host systems are associated with root cause errors at a stack level below a virtualization layer by detecting an error at a user application interface; identifying an associated root cause error at a lower stack level; creating an error trace entry for the error; associating an error log identifier with the error trace entry; making the combined error log identifier and the error trace entry into an error identifier that is unique within the plurality of host systems in said stacked system; and communicating the error identifier to any requester of a service at a user application interface of one or more host systems when the service must be failed because of the root cause error.

The invention discloses an information transferring model based fault tracing method for process industrial complex electromechanical system. On the basis of mass high-dimensional system operating state monitoring data, by adopting a data analysis method and taking an information transferring relation among different monitoring variables as a measure of a system information model coupling relation, a system fault process recognition method and a tracing method are provided in comprehensive consideration of influences of process industrial feedback control on a system fault tracing process. According to the method, a unique root event of a system fault can be traced from any abnormal information monitoring points, and the fault tracing process is independent of system physical topology priori knowledge. The processing process can be partially and directly applied to information modeling of the process industrial complex electromechanical system, tracing of system fault causes can be realized, the digital monitoring level of enterprises is raised, and scientific maintenance is facilitated.

The invention discloses a method of determining a path fault, a controller, switches and a system. Through presetting a flow entry on each switch on a to-be-detected path, the controller indicates the switch to report the label of the path where the switch is after a fault trace message is received; the controller compares the information of the switch corresponding to the received path label with predetermined information of each switch in the to-be-detected path corresponding to the path label, whether a fault appears in the to-be-detected path is determined according to a comparison result; and the controller only needs to issue one fault tracking message to an initial switch in the to-be-detected path, detection on at least one path can be completed, and the path detection efficiency can be improved. During the whole process, the switch completes data layer functions such as message forwarding and information reporting only under control of the controller, which is in line with features of separation between a control panel and a forwarding plane in a SDN (Software Defined Network).

The invention provides a method and a device for recognizing a low-grade fault of a deep tight sandstone gas reservoir. The method comprises steps: frequency division processing is carried out on post stack seismic data of a to-be-recognized low-grade fault, and dominant frequency band seismic data capable of highlighting the low-grade fault can be acquired; directional filtering processing is carried out on the dominant frequency band seismic data to acquire seismic data in four main directions; according to the seismic data in the main directions, an ant swarm algorithm is adopted to calculate and acquire a tracing attribute volume in each main direction; and fault traces of the fault in each main direction are extracted, and the tracing attribute volume in each direction is combined to acquire a system diagram. Through carrying out frequency division processing and filtering processing on the post stack seismic data with a relatively poor quality and adopting the ant swarm algorithm again for recalculation on the basis of the original ant swarm, accurate fault traces are extracted, the tracing attribute volume in each direction is combined to acquire the system diagram, the method and the device of the invention are applied to seismic data with various mechanical properties and frequencies, and recognition reliability on the low-grade fault can be effectively improved.

The invention provides a system and a method for debugging multiple field-programmable gate arrays (FPGAs). The method comprises the following steps: selecting and grouping to-be-tested signals according to a clock domain by virtue of a signal selection and transmission module for instantiating each to-be-tested FPGA, and configuring a high-speed serial transceiver bus port of signal transmission; performing logic synthesis and location wiring on the design logic of the to-be-tested FPGAs and the signal selection and transmission module together; finding displacement information aligned with all channels according to the longest time delay in high-speed serial bus channels of all the to-be-tested FPGAs by using a special tested FPGA in a channel alignment operating mode selected by a debugging host; and selecting a to-be-tested signal group of the to-be-tested FPGA by the debugging host, and configuring the channel time delay value by using frequency information of the to-be-tested signal group. According to the system and the method disclosed by the invention, the cross-FPGA chip signal is observed and captured by using a special tested FPGA, and the fault tracing and positioning efficiency of a debugging system is improved.

Provided is a fault tracing system and method for remote maintenance. The fault tracing method includes detecting faults by receiving error events or fault diagnosis request messages, generating transactions for the detected faults, tracing the faults according to the transactions, and notifying a client terminal or user of the fault diagnosis results. Accordingly, it is possible to accurately trace a fault even in a home/building network environment complicatedly consisting of various resources.

The invention relates to the field of fault propagation and fault diagnosis and tracing, and discloses a fault tracing method and system. The fault occurring type and the fault occurring point are quickly and effectively determined while the fault propagation characteristic is considered, and the implementation cost is low. The fault tracing method comprises the steps of arranging at least two observation points at different positions of a to-be-tested traction transmission control system, and building a first propagation model; analyzing time-space characteristics of all the observation points when different types of faults occur, and building a fault signal propagation model; building a fault dictionary; extracting fault detection characteristics of all the observation points in runningdata, comparing the fault detection characteristics with a set threshold value, and judging whether or not the system has a fault; if yes, preliminarily judging the occurring position of the fault, and obtaining a fault dictionary matrix corresponding to the position; constructing fault characteristic vectors of real-time running data of all the observation points, and matching the fault characteristic vectors with rows or partial elements in the corresponding fault dictionary matrix to achieve fault tracing.

The invention, which relates to the field of open-phase determination method, discloses a method for repairing a high-voltage-side open-phase fault of a distribution transformer. At present, problemsof being lacking of a real-time performance and insufficient intelligent degree in the open-phase determination exist. The method comprises steps of data acquisition, data matrixing, high-dimensionalfeature extraction, multi-feature fusion, fault tracing, and high-voltage open-phase fault diagnosis. According to an MP-Law-based spectral analysis and a Ring-Law-based average spectral radius index,an LES Statistical indicator system and visualization are established and thus an open-phase determination indicator is constructed; operation and environmental information of a distribution networkare fused, a fault influence factor is analyzed, modeling of an equipment state evolution process is carried out based on a time sequence, relevant indicators are formed by using a random matrix and thus the state of the grid line is evaluated, so that the guidance is provided for the repairing setting of the distribution network. Corresponding resources are allocated for all types reasonably andthe reasonable allocation of maintenance resources is realized; and the allocation of maintenance resources of the distribution network is optimized, so that the emergency repair becomes accurate.

In a method for fault tracing in automatically operating electronic measurement and test arrangements for a large number of electrochemical elements, cell simulators are inserted into the holders which are provided for the electrochemical elements. The external shape and size, including the electrical connections, of these cell simulators simulate an electrochemical element. They contain test electronics, whose behaviour with inverse polarity differs to a major extent from the behaviour with polarity based on the application. One cell simulator is activated and has a measurement current applied to it. The voltage and/or the voltage response on the cell simulator are/is then measured and are/is compared with the nominal voltage value predetermined for this cell simulator. The test electronics comprise at least a resistor and a diode connected in parallel.

The invention provides a distributed inventory scheduling method. The distributed inventory scheduling method comprises the following steps: S1, collecting respective initial inventory; S2, calculating respective inventory ordering points; S3, each inventory node judging the respective inventory state; S4, each inventory node reporting an initial inventory, an inventory order point and an inventory state; S5, the scheduling coordination center calculating the total stock and the total stock ordering point; S6, judging whether the total stock is smaller than the total stock ordering point or not, and if yes, entering the step S7; if not, entering the step S8; S7, obtaining the optimal order quantity; S8, obtaining the optimal allocation quantity, and controlling the inventory nodes to mutually allocate the inventory goods according to the optimal allocation quantity. By establishing the allocation cost minimization model and the ordering cost minimization model, the allocation or ordering scheme is optimized, the inventory scheduling cost is saved, the storage turnover rate and the inventory flexibility are improved, the material fault tracing capability is improved, and the inventory cost is reduced.

The invention relates to the field of cable fault detection, in particular to a movable cable fault tracing device. The movable cable fault tracing device comprises a signal probe, earth current EC, a compound power amplification circuit, a voltage amplification circuit, a feedback circuit, a voltage regulator circuit and an alarm circuit. The movable cable fault tracing device has the advantages of finding breakage fault points because of frequent buckling and crimping in a movable cable quickly and effectively, protecting the whole movable cable well, and prolonging service life of the movable cable, and the breakage fault points do not need to be found by splitting the movable cable section by section. In addition, the movable cable fault tracing device has the advantages of being simple in structure, easy to operate, extremely safe, and suitable for wide application.

The invention discloses a color developing pre-warning device for real-time monitoring of insulation gas decomposition products of a SF6 power equipment, which comprises a stainless steel shell. The stainless steel shell is provided with two glass explosion-proof color developing pipes inside and observation windows at the two sides. The stainless steel shell is provided with a connecting head atthe top end and a circle of guide rail at the inner wall of the bottom. The front end of the guide rail is fixedly provided with a baffle with air holes. The guide rail is provided with a sheet inside. The back side of the sheet is connected with at least one spring. The other ends of the springs are arranged on a pressure sensor. The rear side of the pressure sensor is connected with a controller. The rear side of the controller is connected with a power supply. The rear side of the power supply is connected with a rotating indicator lamp. A transparent tempered glass is arranged on the position facing the rotating indicator lamp of the bottom of the stainless steel shell. The device can capture the fault traces and accurately locate the defects after installation.

The invention relates to a fault geometric structure obtaining method and device, computer equipment and a computer readable storage medium. The method comprises the steps of generating a digital elevation model of a target area i; determining a fault trace in the digital elevation model, wherein the fault trace is used for representing a trace of a fault in the digital elevation model on the ground surface; sampling the digital elevation model of the target area according to the fault trace; generating a plurality of planes based on sampling; convergence planes of the multiple planes are obtained; and determining a fault plane structure of the target area according to the convergence plane. The efficiency of obtaining the fault surface structure can be improved.

Providing high speed fault tracing within a blade center system by using a high speed transmitter port of a switch to implement a first snoop port and using a high speed receiver port of the switch to implement a second snoop port, thus permitting snooping of the blade center system from a single blade slot.

The present invention provides an electric power device insulation detection and line 'soft ground' fault tracing instrument. The fault tracing instrument comprises a switching power supply, a charging circuit, a lithium battery pack, an undervoltage detection control circuit, a DC/DC power switching circuit, a pulse generation and regulation circuit, an overload detection, control and alarm circuit, a high-voltage oscillating circuit, a high-voltage transmitter circuit and a high-pressure instrument circuit. A pulse high voltage capable of stepless regulation is employed to perform detectionof a leakage current at insulation weakness positions of electric power devices and circuit thereof, when high-voltage electric power devices with many machines and complex circuits have bad insulation or 'soft ground' faults, corona or pulse charge generated at the fault points of a tested device are observed to rapidly and effectively search 'soft ground' fault points of the tested device, and therefore, the electrical detection working efficiency can be greatly improved. The instrument is compact in structure and convenient to carry, can perform detection of electric power devices on sceneand is very convenient to use.

The invention discloses a fault tracing method in a lithium ion battery production process. The method comprises the following steps of: firstly, acquiring a normal state sample set and a fault statesample set in the lithium ion battery production process,and performing data binarization operation; constructing a binary feature combination optimization model for distinguishing normal state data from fault state data; calculating a binary feature group set enabling the model objective function to reach an extreme value, and reversely converting the binary feature group set into a physical-quantity-based production rule set; and performing fault tracing analysis according to the production rule set. The fault tracing method does not depend on a system mechanism and priori knowledge in the lithium ion battery production process, innovatively constructs the binary feature combination optimization model from the perspective of data, and realizes parallel discovery of multiple fault judgment rules to realize fault tracing analysis.