32results about How to "Not affected by failure" patented technology

The invention provides a real-time monitoring method for a virtual machine in a cloud computing system. The method is disclosed for solving the technical problems. The method comprises the steps that a control agency of a virtualization server is started, the virtual machine provided with a virtual serial port device is established and started, the virtual machine starts a monitoring agency of the virtual machine, the monitoring agency opens the virtual serial port device, and the virtual serial port device corresponds to a socket on a physical server; the virtual machine is signed up in the control agency; the control agency opens the socket of the virtual serial port device of the virtual machine; the control agency is in communication with the monitoring agency of the virtual machine through the opened socket so as to monitor the virtual machine. Due to the fact that the virtual serial port device which is represented as the socket is used as a monitoring processing communication mode in a cloud computing environment, monitoring management does not depend on a network and is not affected by a network failure, expandability is enhanced, and then security and stability are improved.

The invention relates to an intelligent network video monitoring and security and protection management platform linkage system, and the system mainly comprises front-end equipment, transmission equipment, storage control equipment, and display equipment. The system employs an optical fiber to achieve the transmission of a digital video signal, has technical advantages: remote transmission, high transmission speed, and stable signals, and achieves the linkage with an alarm system, an entrance guard system, and a fire extinguishing system. The system is good in integration, facilitates the management, is not liable to cause image loss, and brings convenience to a security guard on duty at a monitoring center or a worker at the management department for timely knowing the practical condition of a site. The system achieves the arrangement of all platform ports, and extends an access client according to the needs.

The invention provides a tunnel risk and disaster real-time monitoring system and method based on multi-source perception. The tunnel risk and disaster real-time monitoring system based on multi-source perception includes a plurality of monitoring terminals of different perception types, a remote big data platform and relay terminals; the monitoring terminals of different perception types are connected between two relay terminals through secondary type composite cables to form a secondary ring network; a plurality of relay terminals form a primary ring network through main type composite cables, and communicate with the remote big data platform; and the monitoring system consists of a primary ring network and a plurality of secondary ring networks. The tunnel risk and disaster real-time monitoring system and method based on multi-source perception can monitor multiple risks and disasters in the tunnel in real time, the reliability of the system is high, and the operation of the entiresystem cannot be affected by the failure of some terminal equipment.

The invention discloses a wind-powder-based electric power quality cascade compensation method. The method comprises the following steps of: converting wind energy into alternating current and outputting the alternating current by a wind driven generator; converting the alternating current output by the wind driven generator into stable direct current by adopting a rectifier module, and performing tracking control at the highest power on the rectifier module to ensure that the active power of the direct current output by the rectifier module is maximum; converting the direct current output by the rectifier module into alternating current; and detecting the voltage of an electric network, and if the voltage of the electric network is reduced, controlling an H-bridge inversion unit to output alternating current to compensate the voltage drop of the electric network. Correspondingly, the invention also discloses a wind-powder-based electric power quality cascade compensation device, and the device comprises the wind driven generator, the rectifier module, the H-bridge inversion unit, a grid-connected inverter, a controller and the like.

The invention discloses a magnetic clamping system for laser welding. The magnetic clamping system provides clamping force needed in welding through magnetic force of a permanent magnet material, is simple and reliable and can well remove gaps between parts and guarantee product quality. The magnetic clamping system comprises electric control permanent magnet worktables, a centralized control unit and a magnetization and demagnetization cable. Each electric control permanent magnet worktable is formed after arraying a plurality of electric permanent magnet modules according to the shape and welding position of a weldment, wherein the number and shape of the electric permanent magnet modules can be flexibly designed according to actual needs. The centralized control unit magnetizes or demagnetizes the electric control permanent magnet worktables independently through the magnetization and demagnetization cable to achieve modular control. In this way, different electric control permanent magnet worktables can be selected to be independently or simultaneously magnetized or demagnetized according to the sequence requirement of a welding technology, and accordingly the magnetic clamping system is convenient and flexible to use.

The invention relates to a double-cylinder sectional type horizontal multilevel centrifugal pump. The double-cylinder sectional type horizontal multilevel centrifugal pump comprises a drive-end bearing part, cylinders, a suction box, a guide vane middle section, impellers, a pump spindle, a balanced pipe part, a pump cover, a balancing mechanism, a drain pipe, a non-drive-end bearing part, wherein the inner cylinder of a sealing box located at the terminal end of the drive-end bearing part is fixedly connected to the end plate of the sealing box; the end plate of the sealing box is fixedly connected to the cylinders. Guide vanes in the pump and the middle section are of an integral structure; the positive guide vanes and the suction box are of an open structure. The double-cylinder sectional type horizontal multilevel centrifugal pump is compact in structure, more convenient to install, maintain and detect, reliable in operation and high in efficiency, is suitable for transporting products of petrochemical engineering and other chemical industries, high-temperature and high-pressure mediums and mediums with corrosiveness or flammable and combustible characteristics, can serve as a big-flow high-temperature and high-pressure boiler water supply pump and a diesel hydrogenating and feeding pump.

The invention discloses a two-step authentication auditing system based on SSH Certificate and LDAP. The two-step authentication auditing system based on SSH Certificate and LDAP comprises the following steps: step (1), when a domain administrator creates a user in a domain (or LDAP) server, creating a corresponding ObjectClass attribute for the user to store sshpublickey and Role information, filling a corresponding user public key and a role corresponding to an authority which can be obtained by the user, and due to safety consideration, only inputting a public key pair based on an ED25519 algorithm by internal requirements, and the domain administrator audits the public key security algorithm and the authority corresponding to the role. According to the system, the instability of loginauthentication service is greatly improved, all subsequent authentication passes through a digital signature mode after internal authentication is completed, a third-party system is not involved during transnational network server authentication, the availability of the whole service is ensured as much as possible, and after authentication is completed in the VPN network of the OA, the limitationof the VPN can be broken away in a short time, the influence of the fault of the OA system is avoided, and higher flexibility is provided.

The improvement of a driving mechanism of a crankless engine comprises ten items including: (1) a set of knuckle-joint drive mechanism in linkage with a main shaft gearwheel and a slide sleeve is added;(2) a proximity sensor is utilized to substitute an original photocell sensor; (3) two sets of small linkage mechanism for controlling a hydraulic air distribution valve are connected with a swing arm; (4)improvement of the slide sleeve structure; (5) improvement of main shaft lubrication, sealing and bearing structure; (6) improvement of a driving shaft and a driving shaft gear; (7) improvement of the intermediate shaft structure; (8) all driving gears adopt herringbone gears; (9) a tunnel type structure is adopted by the mechanism; (10) an overrunning clutch is utilized to substitute a ratchet drive, regarding the low-revolution speed high-power engine.

The invention relates to a looped network power supply system fault positioning system based on communication injection waveforms. The positioning system is composed of relay protection devices installed at each load/section switch and a protection server communicating with each protection device, and the protection server and the relay protection devices perform full duplex communication through optical fibers; and one section of bus area is configured with one device. According to the scheme, the power failure range can be effectively reduced, and the fault is isolated by tripping of the switch closest to the fault point; the scheme is irrelevant to the number of power supplies, so a radiation single-power supply network can be realized, and fault positioning and isolation of a multi-power supply annular power supply network can also be realized.

A device for judging whether a train is driven into a siding comprises an inertial navigator and a gyroscope which are located on the train, wherein the inertial navigator is used for acquiring the speed information and azimuth information of the train, the gyroscope is used for acquiring the angular motion state information of the train, the inertial navigator and the gyroscope send the acquired information to a siding-entering judging and processing device, the siding-entering judging and processing device processes the azimuth information and the angular motion state information of the train and then draws a train operation vector locus diagram, and finally, the siding-entering judging and processing device sends the drawn train operation vector locus diagram out through a communication interface. The device and method for judging whether the train is driven into the siding have the advantages that the judgment of whether the train is driven into the siding does not depend on track ground equipment and is not affected by failures of the ground equipment; the judgment of whether the train is driven into the siding does not depend on other equipment of the train and is not affected by failures of train controlling equipment; the judgment of whether the train is driven into the siding is achieved through combination of train operation vector loci calculated by means of a mathematical model and a self-learning basic database, and the judgment is accurate.

The invention belongs to the technical field of power equipment, and particularly relates to a novel active protection device in a DC system. The circuit comprises a double-tube forward DC/DC converter, a single-chip microcomputer control circuit, an output diode and a detection circuit. The input end of the double-tube forward DC/DC converter is connected with the storage battery pack, and the output end of the double-tube forward DC/DC converter is connected with the direct-current load through the output diode; the single-chip microcomputer control circuit is connected with the driving endof the double-tube forward DC/DC converter and further connected with a transmission interface of the detection circuit, and a sampling port of the detection circuit is connected with an output diodeat the output end of the DC/DC converter. The single-chip microcomputer control circuit is also connected with a communication interface and a man-machine interaction interface. According to the invention, the functions of active isolation, active fault detection, active fault positioning and equipment protection of the AC-DC channeling line fault can be realized.

The invention relates to a method for repairing a helicopter tail shaft image rubber bush, which includes a rubber bush selection principle, a preparation method, a bonding method, and a cut treatment method, thereby ensuring the repair quality of the faulty rubber bush. When the rubber bush fails, the tail shaft repaired by the invention can continue to be put into use, so that the tail shaft of the helicopter can not be affected by the fault of the rubber bush in the whole life cycle, which reduces the use cost of the tail shaft of the helicopter and saves resource.

The invention relates to a self-reliance type automatic recirculating pump protecting valve which comprises a valve body, a valve cover, a spring, a check valve clack, a valve element and a bypass flange. The valve body is provided with a main flow channel inlet, a main flow channel outlet and an assembling opening. The valve cover is in sealing connection with the assembling opening. One end of the spring is connected with the inner side of the valve cover. The check valve clack is provided with a bypass flow channel. The valve element comprises a stroke section and a bypass section. The bypass flange is provided with a bypass flow channel outlet. The other end of the spring is connected with the check valve clack which is provided with a pressure reducing opening. The stroke section of the valve element is placed in the bypass flow channel. The bypass section of the valve element is provided with a bypass water channel and at least one throttling opening. The valve body is further provided with a bypass assembling opening which is in sealing connection with the bypass flange. The pressure reducing opening, the throttling opening, the bypass water channel and the bypass flow channel outlet are communicated in sequence. The self-reliance type automatic recirculating pump protecting valve is compact in structure, a power supply and control signals do not need to be added, an actuator is avoided, automatic operation can be carried out, mounting is convenient, on-line maintaining can be carried out, and maintaining is convenient.

The invention discloses a management control system for preventing the deciphering of a cloud host password. The management control system comprises a first host and a second host, wherein an output end of the first host is connected with an input end of a processing module, the output end of the processing module is connected with the input end of an extraction module, the output end of the extraction module is connected with the input end of a cloud hard disk, the output end of the cloud hard disk is connected with the input end of an optical fiber switch, and the management control system relates to the technical field of management control systems. According to the management control system for preventing the deciphering of the cloud host password, the output end of the first host is connected with the input end of a processing module, so that the data reliability is high, no influence by the single machine failure of the user is ensured, the independence and persistence are good,the management control system can be mounted to any cloud host, the output end of a load balancing service platform is connected with the input end of a WEB service platform, so automatic fault switching can be implemented, thereby improving the external service capability of the application program, and improving the utilization rate of resources while improving the availability of the service.

The invention discloses a car and car door monitoring algorithm which comprises the following steps: S1, acquiring acceleration data of a car door in the horizontal direction and the vertical direction through a motion sensor mounted on the car door of an elevator; S2, obtaining an acceleration curve by adopting a leader mean algorithm according to the collected car door acceleration data; and S3,working out a speed curve and a distance curve according to the acceleration curve. According to the car and car door monitoring algorithm, independent monitoring and calculation are achieved, the car and car door monitoring algorithm is not affected by elevator faults, elevator operation is not disturbed, and higher safety is achieved. One sensor is adopted to monitor the running states of a carand the car door at the same time, and the structure is simpler. The car and car door monitoring algorithm is simple, and complex algorithms such as Kalman filtering are not needed, so that high-costcomputing equipment such as an industrial computer is not needed. The car and car door monitoring algorithm is different from a traditional mean value algorithm, the mean value is not obtained in a segmented mode, and data size loss cannot be caused. The operation is reversible, and the original value can be reversely deduced at any time according to the result for other applications.

The invention provides a power supply system for a variable-frequency winch. The power supply system comprises a feed power supply, and a main motor, a frequency converter, a main motor blower fan and a hydraulic oil pump for operation of the variable-frequency winch. The feed power supply connects and supplies power to a frequency converter. An output end of the frequency converter is connected with the main motor. The frequency converter comprises a transformer. An output end of the transformer is connected with an input end of an illumination comprehensive protection device. The transformer reduces voltage of the feed power supply and applies reduced voltage to the working power supply of the illumination comprehensive protection device. An output end of the illumination comprehensive protection device is connected with a PLC control cabinet. The PLC control cabinet controls the main motor, the main motor blower fan and the hydraulic oil pump respectively. The transformer reduces voltage of the hydraulic oil pump, the main motor and the main motor blower fan to 660V, so that the voltage class is lowered, the requirement for motor insulation is lowered, and the service life of a motor is prolonged. In addition, the transformer serves a function of isolating voltage fluctuation of an electrical network, so that an operation power supply of the main motor is enabled to be more stable.

The invention belongs to the technical field of fatigue tests, and particularly relates to a control system fatigue test loading device. The device comprises an actuator, a fixing plate, a limiting screw rod, a pulling direction limiting plate, a pressing direction limiting plate and an actuating block. An outer cylinder base and an actuating rod are arranged on the actuator; the fixed plate sleeves the outer side of the actuating rod through the first through hole and is fixedly connected with one end of the outer cylinder base; the limiting screw rod is fixedly mounted in the first mounting hole of the fixed plate; the pull direction limiting plate sleeves the outer side of the actuating rod through the second through hole and is fixedly connected with the limiting screw rod through the second mounting hole; the pressing direction limiting plate sleeves the outer side of the actuating rod through a third through hole and is fixedly connected with the limiting screw rod through a third mounting hole, and a preset distance is formed between the pressing direction limiting plate and the pull direction limiting plate; and the actuating block is fixedly connected with the actuating rod through the fourth mounting hole, and is limited between the pull direction limiting plate and the pressing direction limiting plate. According to the invention, the moving position of the actuating rod can be actuated, thereby protecting the test piece.