72results about How to "Accurate fault judgment" patented technology

The invention discloses a heterogeneous network operation and maintenance management method based on user perception. The method comprises the steps that 1, heterogeneous network operation and maintenance data are collected by a base station and a network monitoring node; 2, the obtained heterogeneous network operation and maintenance data are processed in a unified mode, and a unified operation and maintenance data model is built; 3, correlation analysis is carried out on the heterogeneous network operation and maintenance data and network faults according to the built operation and maintenance data model to achieve network fault positioning; 4, the network node independently analyzes the positioned faults, adjusts corresponding operation and maintenance data and achieves fault self recovering and network optimization. After network operation and maintenance data excavation analysis and network fault positioning, network self recovering is achieved by optimizing network parameters, user experience is improved, and network intelligent operation and maintenance are achieved.

The invention discloses an overhead contact system rod insulator fault detection method based on Harris corners and image difference. The method includes the following steps: the Harris corners of a selected template image and an image to be detected are first respectively detected; the sequential similarity detection algorithm is then utilized to match the corners in the template image and the image to be detected; the matched corners are then fuzzily clustered, and because matching can cause the loss of useful corners, the corners need to be recovered; afterwards, the least square method is utilized to fit a straight line; finally, according to the symmetry of the images on two sides of the straight line, the image is differentiated, the vertical grey level is calculated, a fault information curve is obtained, and a fault diagnosis is presented. The method realizes the rotation resistance of template matching, moreover, the fault diagnosis is simple, and the method provides a new idea for the development of intelligentized patrol inspection systems for overhead contact systems, and can purposefully enhance the safe reliability of overhead contact systems of electrified railways.

The invention provides a service-uninterrupted load balancing method and system, and the method comprises the steps: S1, enabling a load balancing device to judge whether the service of a rear-end instance is available or not in real time, and updating the service state of the rear-end instance to a service availability list stored in a shared memory; S2, the shared memory writes the updated service availability list into a configuration file of each load balancing device in real time, and persistently stores the configuration file; And S3, when the load balancing device receives the user request, selecting an available back-end instance to process the user request according to the service availability list. Updating the service state of the rear-end instance to a service availability liststored in a shared memory in real time; The shared memory writes the service availability list change information into a configuration file in an asynchronous manner, and notifies other load balancing devices to update related configuration files; The load may be dynamically requested to a backend instance absent in the configuration file without restarting the load balancing device.

The invention discloses an electromagnetic valve drive device with a fault diagnosis function and a self-protection function. The electromagnetic valve drive device comprises a microcontroller ECU, a driver, a high-voltage drive MOSFET switch, a low-voltage drive MOSFET switch, a lower-end MOSFET switch, a current sampling and comparing circuit and a CPLD logic module. The microcontroller ECU is connected with the driver and the CPLD logic module. The driver and the CPLD logic module are connected with the three MOSFET switches. The current sampling and comparing circuit is connected with the lower-end MOSFET switch and the CPLD logic module. The electromagnetic valve drive device with the fault diagnosis function and the self-protection function is simple in structure. Different faults of an electromagnetic valve are quickly detected by means of the CPLD technology. Besides, the electromagnetic drive device is protected when the faults happen. The electromagnetic valve drive device has the excellent performance of being accurate in fault judgment, high in response speed and few in occupied CPU resource.

The invention relates to method for testing and sorting the gang electronic device, which comprises the following steps: a) step-by-step driving the electronic device according to the space between two devices in sequence, b) transporting to the pre-cutting station, keeping one pin on the connecting plate and cutting off the other, c) transporting to the testing station to test, driving the testing box through the adjustable apparatus, connecting the tested electric pole with the pin to get the apparatus parameter, d) cutting the scoring pin in the final-cutting station, then transporting to the baiting sorting device. The invention has high precision of gearing and high automation, uses several photoelectric sensors and overtravel-limit switches to test, which can pinpoint exactly and judge the fault precisely, and increase the sorting speed violently.

The invention discloses a vehicle failure and maintenance information management platform which comprises a failure information collecting system, a failure information transmission system, a central database and a case tracking and feedback system. The failure information collecting system is used for collecting failure codes of a failure vehicle. The failure information transmission system is used for transmitting the failure codes of the vehicle, vehicle model information, position information and status information to the central database. The central database is used for analyzing and judging the data information transmitted by the failure information transmission system, quoting a price for the failure vehicle according to a price list of a maintenance shop and sending a price sheet to the owner of the vehicle and the maintenance shop, and the owner of the vehicle selects the corresponding maintenance shop to maintain the failure vehicle. The case tracking and feedback system is used for transmitting the maintenance data of the failure vehicle back to the central data base and updating the obtained corresponding maintenance records to the central database. According to the vehicle failure and maintenance information management platform, the owner of the vehicle does not need to be asked to pay the maintenance cost directly, a large amount of price inquiry time of the owner of the vehicle can be saved, the maintenance period is shortened, and efficiency is higher.

The invention discloses a power cable fault positioning platform, including a cable fault detector arranged on a power cable, a signal back-transmission mechanism, a mobile monitoring station and a mobile monitoring unit. The mobile monitoring unit comprises an overhead track and a mobile mechanism wherein the mobile mechanism is provided with a monitoring terminal; the signal back-transmission mechanism comprises a communication line arranged in a cable conduit and a number of wireless receivers; the fault detector is provided with a first wireless communication module; the monitoring terminal comprises a control module, a second wireless communication module, a storage module, a sensor module, a video monitoring module and wireless emitters arranged correspondingly to the wireless receivers; and the mobile mechanism is provided with a plurality of fault positioning mechanisms through an ejection mechanism. The platform of the invention performs comprehensive monitoring to the cable fault through the real-time acquisition of online current by the fault detector and through the fault point positioning, allows the workmen to quickly find the specific fault position so as to realize the rapid maintenance to the fault point.

The invention discloses an electrical design method for preventing a direct current overhead contact system from being frozen. The method comprises an electrical circuit design method and an electrical control design method. According to the anti-freezing electrical circuit design method, on the basis of a basic structure of a direct current traction power supply system, a direct current bus of adirect current traction substation continuously outputs a certain amount of current to the overhead contact system, the size of the current is adjusted through adjustment of the circuit input range ofthe overhead contact system, and contact lines are prevented from being frozen through the thermal power of the overhead contact system. An anti-freezing circuit is low in consumption, small in equipment input, free of addition of manpower and mechanical facilities and easy to realize in a project. According to an electrical circuit control method, circuit control logic, action criteria and a control logic principle are proposed, and the control method is simple, effective and reliable.

The invention discloses a power cable fault monitoring platform. The power cable fault monitoring platform comprises a fault detector arranged on a cable line, a signal return mechanism arranged in a cable duct, a monitoring center and a movable monitoring unit connected with the monitoring center, wherein the movable monitoring unit comprises an overhead track formed in the cable duct, a moving mechanism arranged on the overhead track and a monitoring terminal arranged on the moving mechanism, the signal return mechanism comprises a communication line arranged in the cable duct and a plurality of data interface modules formed in the communication line, and the fault detector is provided with a first wireless communication module. The fault detection of the whole cable and monitoring environment information and device information in the cable duct can be achieved only by using a small number of sensors, an online current mode is acquired in real time through the fault detector to conduct comprehensive monitoring on line faults, and fault judgment is more timely and accurate.

The invention relates to a vehicle failure endoscopic diagnostic system and a vehicle failure endoscopic diagnostic method. The system and the method are characterized in that: a two-channel image sample acquisition system consisting of wire transmission and wireless transmission is arranged; and images acquired by two channels can be displayed on the same liquid crystal display and can be stored in a storage at the same time as a standard or failure image database. The failure diagnostic method comprises the following steps of: 1, acquiring an actual image of a checked part of an automobile; 2, querying whether a storage system database has a standard image or a failure image of the checked part of the automobile or not; 3, if so, calling a marked image or the failure image; 4, otherwise, acquiring the standard image; 5, displaying the actual image and the standard image or the failure image on the same display screen; 6, comparing the actual image and the standard image or the failure image to analyze the differences and similarities of the images; and 7, drawing a conclusion denoting whether the checked part of the automobile has a failure or not.

The invention relates to an early fault detection system of a low-speed heavy-load machine. According to the technical scheme, the signal output end 1a of a pressure vibration sensor (1) is connected with the signal input end 2a of an amplifier (2); the signal output end 2b of the amplifier (2) is connected with the signal input end 3a of an ultra-low-frequency phase-locked loop (3); the signal output end 3b of the ultra-low-frequency phase-locked loop (3) is connected with the analogue input end 4a of an analogue-digital converter (4); the digital output end 4b of the analogue-digital converter (4) is connected with a serial port com1 of a computer (5); a piezoelectric element (9) of the pressure vibration sensor (1), a mass block (8) and a circuit board (7) are fixed on the upper plane of a base (11); a housing (6) is fixed at the upper part of the base (11); a band-pass filter (12) is connected with a low-pass filter (14) through a high-pass filter (13); the low-pass filter (14) is connected with the amplifier (2); the band-pass filter (12) is connected with the piezoelectric element (9). The early fault detection system has the characteristics of capability of conveniently extracting weak impact signals, small number of sampling points and accuracy in fault judgment.

The invention discloses a device for detecting broken strands of a hoisting steel wire rope. The detection device comprises a tension detection element and a control unit; the tension detection element is used for detecting the tension of the steel wire rope; the tension detection element feeds the detected steel wire rope tension signals back to the control unit for processing; and for the same steel wire rope, when the subtraction value of the tension detected in the first time and the tension detected in the second time is larger than or equal to 50%, the strands of the steel wire rope is judged to be broken. The invention further discloses a method for detecting the broken strands of the hoisting steel wire rope. The device and the method provided by the invention have the advantages that a conventional pressure sensor or a steel wire rope tension gauge and a lift control cabinet microcomputer circuit board are adopted, so that the manufacture process is mature and the cost is low; and a failure can be judged accurately, the reaction speed is high, and passenger safety can be better protected.

The invention discloses an intelligent multifunctional cable line fault online monitoring system which comprises multiple fault detectors, a centralized processor, a communication interchanger and a monitoring system server. 2.4 G wireless communication modules, single-chip microcomputer control units, current sensors and lamplight alarm modules are arranged in the fault detectors. The centralized processor is connected with the monitoring system server through the communication interchanger, receives sampling data of the fault detector A, the fault detector B and the fault detector C, conducts preliminary fault information calculation and sends the processed and analyzed data to the communication interchanger, and the communication interchanger decodes fault information and uploads the decoded fault information to the monitoring system server. According to the intelligent multifunctional cable line fault online monitoring system, short-circuit, grounding, overload, broken-line, power-off, three-phase unbalance and stealing fault conditions and the like on a line can be comprehensively monitored and fault judgments are made rapidly and accurately.

The invention discloses a shielding method-based detecting method of a fault point of a photovoltaic generation system and belongs to the field of detecting the fault of the solar photovoltaic generation system. Under the solar radiation condition, photovoltaic cell panels of a photovoltaic generation system set are externally shielded by a light shielding plate, and a measurement sequence of the total voltage of a series branch under the different shielding is obtained, the measurement sequence is subjected to bad value judgment, and the shielded photovoltaic cell panels, corresponding to the measurements judged as the bad values, are fault cell panels. The shielding method-based detecting method has the advantages that improvement to the conventional photovoltaic generation system is omitted, hardware configuration of the photovoltaic generation system is not required, the system circuit is not required to be disassembled during the detecting, and operation is simple and effective.

The invention discloses an air conditioner display screen brightness control device. The air conditioner display screen brightness control device comprises a photosensitive assembly (1), a controller(2) and a display screen (3). The photosensitive assembly (1) and the display screen (3) are connected with the controller (2). The air conditioner display screen brightness control device is characterized by further comprising a control terminal (4), wherein the control terminal (4) is connected with the controller (2), and the control terminal (4) can send a control instruction to the controller(2) to directly control the brightness of the display screen (3). The air conditioner display screen brightness control device has the beneficial effects that a user can still adjust the brightness of the display screen when the photosensitive assembly is damaged; and whether the photosensitive assembly breaks down or not is judged according to the detection signal change of the photosensitive assembly, and the situation that the display screen is always off or on is avoided.

The invention discloses a fault detector of an intelligent on-line fault monitoring system of a cable line. The fault detector comprises a housing, a singlechip control unit mounted in the housing, as well as a 2.4G wireless communication module, a current sensor and a light alarm module that are connected with the singlechip control unit, wherein the current sensor is connected with the cable line, collects 12 points of each cycle for fourier current calculation in real time and transmits collected information to the singlechip control unit; and the singlechip control unit accurately obtains a real-time on-line current value of the current line, carries out wireless bidirectional radio frequency short-distance communication with a centralized processor via the 2.4G wireless communication module and transmits collected data to the centralized processor for further processing. The fault detector can completely monitor fault situations such as short circuit, earthing, overload, line breaking, power failure, triphase unbalance, stealing and cutting on the line.

The invention provides a fault processing method and device of an intelligent headlamp system. Before the initialization of the intelligent headlamp system and in an operation process of the system, fault detection and processing are performed respectively, and the actuator fault can be directly detected before the system initialization, thus the actuator fault judgment is quicker, more accurate and simpler so as to avoid the phenomenon that the initialization of the intelligent headlamp system is still performed when the actuator fails, thereby being more humanized.

The present invention relates to an equipment for detecting exchange fault by utilizing LED on the panel of exchange and its detecting method. Said equipment includes a power supply LED, a redundant power supply system LED, several port LEDs, several pattern LEDs, a user interface, a central processor, a LED driver, a physical layer module and a periodic service supervisor. Said invention also provides the concrete function and action of the above-mentioned every component, and provides the connection mode of all the components.

The embodiment of the invention provides a BFD detection method, a device and a system. The BFD detection method comprises steps of: when a first virtual machine receives a BFD detection message of a second virtual machine, acquiring predetermined duration and each sample time interval of predetermined quantity; according to the predetermined duration and each sample time interval of the predetermined quantity, obtaining a feature value, wherein the feature value is used for representing possibility of occurrence of failures of applications in the second virtual machine; and for one application which is running in the second virtual machine, comparing the feature value with a preset failure determination standard of the application and determining whether the application fails or not according to a comparison result. According to the invention, by comparing the feature value with preset failure determination standards of different applications, failure determination and processing are performed, so the BFD detection is enabled to be applicable for requirements of different types of applications / services; and the unified failure determination standard is not used for all applications / services any longer, so failure mis-determination caused thereby is reduced.

The invention discloses an electric power system fault diagnosis method based on an equivalent input interference method. The electric power system fault diagnosis method comprises the following steps that S1, the whole electric power system is reasonably layered, group division is performed on the basis of each layer, groups are divided into subgroups and the equivalent power of each group is calculated; S2, the equivalent input interference observer of each group is constructed; S3, the equivalent input interference threshold of the group is solved; and S4, the change situation of the equivalent input interference observer of the group is downwardly observed layer by layer, the fault occurs through judgment if the situation that the value exceeds the equivalent input interference threshold in a certain time period occurs, detection is downwardly performed to the bottommost subgroup and the concrete node of the fault is determined and location judgment of the fault is realized, monitoring is continued if the situation of exceeding the threshold does not occur, and the subgroups of the groups of which the values do not exceed the threshold are not detected. The defects of the conventional corresponding fault diagnosis method based on the protection device and circuit breaker information can be avoided, fault diagnosis time is short and precision is high.

The invention relates to the technical field of building energy management systems, and aims to provide a holographic intelligent building energy-saving operation and maintenance management system based on a BIM model, which comprises an equipment module, a data acquisition module, a communication module and an operation and maintenance module, the system also includes the fault processing modulethat is connected to the operation and maintenance module and is used for processing faults of the equipment module; the operation and maintenance module acquires data information of the data acquisition module and performs analysis and judgment; when the judgment result of the operation and maintenance module is that the equipment has a fault, the operation and maintenance module automatically generates a fault processing scheme and sends a control signal to the fault processing module; and the fault processing module responds to the control signal of the operation and maintenance module andprocesses the equipment fault of the equipment module. The problems that an existing operation and maintenance management system is long in fault repairing time and large in loss are solved, and the invention has the effects that equipment fault repairing is automatically conducted, so that the fault recovery time is greatly shortened, and losses are reduced.

The invention relates to a magnetic confinement nuclear fusion experimental facility, in particular to a digital safety interlocking system of a magnetic confinement nuclear fusion experimental facility. A circuit of the digital safety interlocking system of the magnetic confinement nuclear fusion experimental facility disclosed by the invention comprises a microcontroller module, a programmable logic circuit module and a power supply module, wherein the microcontroller module at least comprises a Flash memory and an Ethernet interface circuit and is responsible for detecting the real-time state of each safety interlocking subsystem of the nuclear fusion experimental facility and storing fault log information of each safety interlocking subsystem as well as carrying out network communications; the programmable logic circuit module is electrically connected with the microcontroller module and each subsystem of the nuclear fusion experimental facility, at least comprises an input logic and register, a control logic circuit, an output register, a buffer register read / write control circuit, is realized by adopting a programmable logic device (PLD) and is responsible for obtaining the running states and fault signals of all the safety interlocking subsystems of the nuclear fusion experimental facility and processing the fault signals; and the power supply module is used for supplying power to the system. The digital safety interlocking system is used for the safety interlocking protection and online monitoring of the magnetic confinement nuclear fusion experimental facility.

The invention relates to the field of tunnel monitoring. The invention particularly relates to a tunnel vehicle indicator and an illuminating lamp fault identification method. The method comprises thefollowing steps that: firstly, a region of interest is extracted from a tunnel video stream image, then graying binary processing is carried out on the image of the extracted region, morphological operation is carried out on a binary image, then a vehicle indicator region is detected according to the color and shape characteristics of a vehicle indicator, and other regions serve as illuminating lamp candidate regions; the detected state of the area of the automobile finger lamp is identified, an automobile indicator fault identification model is established in combination with an input signalof the automobile finger lamp, and a fault condition is output; and HOG features of the lighting lamp candidate area are extracted, image training is carried out by combining an SVM classifier, so that a short-distance illuminating lamp area is effectively detected, a long-distance illuminating lamp area is detected according to illuminating lamp mounting position characteristics, the detected illuminating lamp state is identified, and an illuminating lamp fault identification model is established by combining an input signal of the illuminating lamp state.

The invention relates to an Ethernet redundancy device of a VxWorks operating system based on network heartbeat, and belongs to the field of embedded software development. A heartbeat message sendingmodule periodically sends heartbeat messages to a broadcast domain where equipment is located through two links; the network message capture module classifies and stores the received heartbeat messages and records the receiving time of each message for the link judgment switching module to call and inquire; the link connection state query module reads a register of the phy chip and periodically queries physical connection states of the two links for the link judgment switching module to call and query; and the link judgment switching module queries information from the network message capturemodule and the link connection state query module, and switches the main link and the standby link according to the heartbeat message and the link connection state. According to the invention, the problem that a physical link is not switched when normal packet receiving is abnormal is solved, more accurate link fault judgment in a single broadcast domain is realized, and more reliable Ethernet redundancy is further achieved.

The invention relates to a dual-power-supply rapid switching method and apparatus through a silicon controlled rectifier. Rapid and successful switching for the dual power supplies in a 12kV power supply system can be carried out through a silicon controlled rectifier switching module; and the switching method and apparatus is suitable for large-scale power utilization enterprises having high requirements on electric power continuity and reliability, such as petrochemical engineering, smelting, mining and the like. The dual-power-supply rapid switching method is characterized by comprising the following steps of (1) connecting two sections of buses that are used in a standby manner for each other through a section switch (1007); and (2) when one section of the bus is in fault, disconnecting an input main switch on one side of the fault bus firstly; then communicating the silicon controlled rectifier switching module (1015); and communicating the section switch (1007) after current, passing through the silicon controlled rectifier switching module (1015), is detected. According to the method and the apparatus, the silicon controlled rectifier switching module can be used to replace a vacuum circuit breaker in the 12kV high voltage dual-power-supply momentary rapid switching process so as to most quickly realize the dual-power-supply switching and to automatically recover the load input voltage.

The invention discloses a detection method for the disconnection of a motor power line in a three-phase AC servo drive system, that is, the method first cuts off the three power tubes of the upper bridge in the power module through a digital signal processor, and then sequentially turns off the three power tubes of the power module Any one of the three power tubes of the middle and lower bridges is turned on, and the AD conversion sampling circuit is used to collect the remaining two phases of the power tubes of the upper bridge. If the capacitor voltage of one phase does not meet the standard, it is judged that the power line of the motor is broken. This method overcomes the defects of traditional motor power line disconnection detection, and is simple, practical, and highly reliable. It can make accurate fault judgments, reduce detection costs, and realize automatic and rapid detection of motor power line disconnection in servo drive systems. , Low-cost detection.

The invention discloses an intelligent on-line monitoring system for cable line faults. The intelligent on-line monitoring system comprises a plurality of fault detectors, a centralized processor, a communication exchanger and a monitoring system server. A 2.4 G wireless communication module, a single chip microcomputer control unit and a current sensor are arranged in each fault detector. The centralized processor is connected with the monitoring system server through the communication exchanger, receives the sampling data of an ABC3 phase fault detector to conduct initial fault information calculation, and transmits the processed and analyzed data to the communication exchanger. The communication exchanger decodes the fault information and then uploads the fault information to the monitoring system server. The intelligent on-line monitoring system for cable line faults can comprehensively monitor the fault conditions such as short circuit, grounding, overload, line breaking, power failure, three-phase imbanlance and burglary and cutting on a line, and fault judgments are quickly and accurately made.

The invention belongs to the technical field of services of web servers, and discloses a service system and a service method based on a multi-web server, and a storage medium. The service system comprises a data communication module, a parameter configuration module, a main control module, a data updating module, a resource balancing module, a database module and a test module. According to the service system provided by the invention, under the condition that no additional load balancing device is deployed, a Web application system achieves the load balancing through the resource balancing module, thereby reducing the complexity of deployment and maintenance; meanwhile, the test personnel does not need to manually construct a test script according to a Web element identifier and other information through the test module; and a connection can also be established with the Web server to be tested through a Telnet protocol to test the Web server to be tested, so that the time used by thetest personnel for manually testing the Web server by using a browser can be saved. Therefore, the test efficiency of the Web server can be improved by the service system provided by the invention.

The invention discloses a detection method and device using a current clamp and computer equipment, the detection method using the current clamp is applied to diagnosis equipment, and the detection method using the current clamp comprises the following steps: obtaining vehicle information of a to-be-detected vehicle; the data reading module is connected with a fault device of a to-be-detected vehicle to read current and voltage data of the fault device; performing comparative analysis on the current and voltage data and preset circuit standard data to generate a current and voltage analysis table; judging whether a circuit of a fault device of the to-be-detected vehicle has a fault according to the current and voltage analysis table; if the judgment result is yes, searching a historical diagnosis record of the same type of vehicles matched with the fault device of the to-be-detected vehicle from a database to obtain a maintenance scheme; the current clamp can be used for detection without professional maintenance personnel, the detection efficiency is high, fault judgment is accurate, a correct maintenance scheme is provided, and the use experience of a user is improved.