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.

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.

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.

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.