126results about How to "Improved resistance to failure" patented technology

The retractable cord assembly (26) comprises a cable (28) having a central carrier and plural conductors helically wrapped about the central carrier. The assembly further includes a grommet for connecting the cable (28) to a device, the grommet having a head and stem, with a passage throught he head and stem for receiving the cable (28). The passgae is tapered to provide an enlarged proximal end when installed. The assembly further includes a flexible metal conduit (30) through which the cable slides. The cable outer surface is nylon braid and the conduit inner surface is a nickel plated to minimize friction therebetween.

The invention relates to an overvoltage protection device and method for the alternating current side of a voltage source converter high voltage direct current transmission system. The overvoltage protective device is connected to two ends of a ground resistor of the converter transformer valve side in parallel and used for acting to lead failure current away, restraining the level of overvoltage of an alternating current circuit I (4) and protecting a converter valve body (9) when overvoltage of a direct current circuit (8) exists due to a fault of the alternating current circuit I (4) or a fault of the direct current circuit (8) or a valve base controller detects the phenomenon that the alternating current circuit I (4) breaks down. The protective device is rapid in action, strong in through-flow capacity, large in absorbed energy, and capable of rapidly protecting the valve body. A control protective device with a complicated structure and complicated functions is not needed. The overvoltage protective device is simple in structure, low in cost and easy to implement, reduces the cost of the alternating current and insulation cost of a converter valve, guarantees safety of the alternating current circuit and the converter valve, improves fault-resistance ability of a converter station, and guarantees safe and stable operation of the voltage source converter high voltage direct current transmission system.

There is disclosed a liquid crystal display including cold cathode fluorescent tubes having improved failure resistance and shock resistance. The liquid crystal display has a liquid crystal panel and a backlight disposed on the opposite side of the display screen of the liquid crystal panel. The backlight has plural light sources and plural lamp holders for holding the light sources. Each of the lamp holders has a pair of gripping portions for gripping the light sources and a connector portion having the gripping portions at its opposite ends. The connector portion has slits in its opposite end portions, the slits extending in the longitudinal direction of the connector portion.

The method includes following steps: step S202, configuring delayed processing time in use for link recovery on main node of Ethernet ring; the delayed processing time is valid for main node only; step S2024, when failure occurs on link, main node and transmission node registers state of link as state of failure, and corresponding process carries out; step S206, when link is recovered, main node processes link switching in delayed time based on delayed processing time. The method prevents multiple times of switching in EAPS short time cause by quick oscillation of link, and unsuccessful operation of EAPS on hardware, and descendent network performance. Moreover, the invention raises capability of resisting fault of Ethernet ring under complex link oscillation.

The invention discloses a method for notifying downstream equipment when switching the uplink status, comprising: configuring a tracking command in the uplink equipment of a route redundant backup system according to existing technology; binding the primary equipment of the route redundant backup system and the core router link as an uplink via the tracking command; binding the primary equipment and a standby equipment link as a downlink via the tracking command. By using the method for notifying downstream equipment when switching the uplink status provided by the invention, when error occurs in the upstream equipment or malfunction occurs in the upstream equipment link, the route redundant backup system can detect the status of the upstream equipment, in order to correctly configure the equipment according to VRRP to realize the primary-standby switching; thus, the open circuit error of the access layer equipment caused by error occurred in the uplink equipment can be prevented, and the anti-error ability of the route redundant backup system in actual network can be enhanced.

A method and an apparatus for detecting a phase-to-earth fault on a three-phase electric line of an electric network, the apparatus determining a neutral admittance based on a ratio of a difference between zero sequence currents on the three-phase electric line and a difference between zero sequence voltages in the electric network before an earth fault and during the earth fault. The apparatus also compares the determined neutral admittance, to a predetermined operation characteristic to detect a phase-to-earth fault on the three-phase electric line. The predetermined operation characteristic, when presented on an admittance plane, defines a closed area such that the center of the closed area is offset from the origin of the admittance plane towards a negative susceptance direction and/or towards a negative conductance direction.

A tool tethering method includes the steps of providing a tool with a longitudinal portion, installing a base layer on the longitudinal portion, providing an overwrap member, and providing a connector strap. The connector strap includes a length of webbing secured to a connector and defining a first catch and a second catch. The connector strap is positioned with the body portion axially aligned with the longitudinal portion of the tool, with the first catch and the second catch facing away from the longitudinal portion, and with the back surface in contact with the base layer. The overwrap member is installed over the body portion of the connector strap and the corresponding region of the longitudinal portion of the tool and base layer, thereby securing the connector strap to the tool.

The invention discloses a split backup method of an Internet of Things access point. The method comprises the following steps: obtaining a backup access point of a first access point, and backing up cache data of the first access point in the backup access point; when it is detected that the first access point is faulty, using a third access point as the backup access point of a second access point; dividing Internet of Things terminals or relays connected with the first access point into a first set and a second set, and switching the Internet of Things terminals or relays in the first set to the second access point, and switching the Internet of Things terminals or relays in the second set to the third access point. By adoption of the split backup method, the paralysis of the Internet of Things caused by the fault of the access point can be avoided, and the fault resistance of the Internet of Things is improved.

The invention relates to a ring-shape connection method between wireless communication base station signal-receiving-transmitting machines. While the wireless base station provided with base-band digital signal processing unit connects with one of remote radio frequency signal-receiving-transmitting machines by a first bi-directional transmission medium, a second bi-directional transmission medium connects with the other remote radio frequency signal-receiving-transmitting machine in ring-shape connection state. The on-state and off-state of the second transmission medium transmission channel is controlled by the wireless base station.

The invention discloses a self-adaptation shaft seal steam supply system. The self-adaptation shaft seal steam supply system comprises a shaft seal main pipe, a valve rod air leakage adjusting steam supply branch, an overflow branch, a bypass pneumatic branch, a high-pressure cylinder shaft seal, a medium-pressure cylinder shaft seal and a low-pressure cylinder shaft seal; the inlet end of the shaft seal main pipe is provided with an auxiliary steam adjusting valve, the inlet end of the shaft seal main pipe communicates with the valve rod air leakage adjusting steam supply branch, the overflowbranch and the bypass pneumatic branch, and the outlet end of the shaft seal main pipe communicates with a rear shaft seal of the high-pressure cylinder shaft seal and a rear shaft seal of the medium-pressure cylinder shaft seal. According to the self-adaptation shaft seal steam supply system, when a unit is started, and after steam supply fails, the pressure difference of the two sides of a steam leakage check valve is increased, a differential pressure transmitter closes an adjusting valve of the valve rod air leakage adjusting steam supply branch, steam supply breaking off is prevented, inthe self-seal condition, the shaft seal steam supply pressure is increased, the differential pressure transmitter opens the adjusting valve of the valve rod air leakage adjusting steam supply branch,over-pressure of the shaft seal steam supply pipeline is prevented, through assisting of a steam adjusting valve, the steam temperature is adjusted, and safety and anti-failure capacity of the systemare improved.

The invention discloses a method and device for guaranteeing reliable operation for Ethernet ring. Main node is restarted by following steps: main node of Ethernet ring network acquires network state before restarting and network configuration information after restarting; the main node blocks the data relay function of control VLAN of self ring port and protection service VLAN, adds the ring port in control VLAN and protection service VLAN; the ring port comprises main port and slave port; data relay function is opened for control VLAN of ring port; the link state is detected for validating entirety; protection service VLAN data relay function of ring port or main port is opened according to the detection result; other node is notified to update MAC address list. The inventive method effectively guarantees normal and reliable operation of Ethernet Ring network.

The invention provides a controller for an electric vehicle. The controller for the electric vehicle comprises a coding module, a sending module, a receiving module, a judgement module and a selection module, wherein the coding module is used for coding first message information according to a preset coding rule, wherein the first message information contains multiple frames of CAN messages; the sending module is used for sending the coded first message information to a first CAN bus and a second CAN bus; the receiving module is used for receiving second message information from the first CAN bus, and receiving the second message information from the second CAN bus; the judgement module is used for judging whether the second message information is correct or not according to a preset judgement rule; and the selection module is used for determining the applied second message information according to a preset selection rule, wherein the preset selection rule comprises: the second message information received from the first CAN bus being wrong, and switching to apply message data in the second message information received from the first CAN bus if the second message information received from the second CAN bus is wrong while monitoring that the correct times of the second message information received from the first CAN bus does not reach preset times.

In the disclosed control system, loops of 1st path and 2nd path are formed connecting an active CPU unit and each of RIO units, the direction of data frame transfer through the loop of 1st path being opposite to that of the data frame transfer through the loop 2nd path. Reflective electro-optical transducer modules are used in the RIO units which are connected with the active CPU unit so that a standby CPU unit can also be connected. Further, the loop of 1st path and the loop of 2nd path are formed connecting the standby CPU module and each of the RIO modules. The data frame transfer directions through the loops connecting the active CPU unit and each of the RIO units are opposite to the data frame transfer directions through the corresponding loops connecting the standby CPU unit and each of the RIO units.

An agricultural sprayer boom comprises vertically spaced upper and lower beams extending along the boom and connected by a plurality of brace members

• formed from a unitary bent tubular member that is secured to the upper and lower beams, and gripped, by clamps.

The invention discloses a high thrust liquid rocket fault reconfiguration control method, which does a research on a fault reconfiguration strategy and a reconfiguration control technology of the high thrust liquid rocket during a booster ascending flight. Possible faults of the rocket are classified according to a logic sequence from a set to a unit to a fault type, a specialistic systematic knowledge base is built, and basic condition equations which need to be met for realizing fault reconfiguration are obtained through deduction; and a swing angle deviator when an engine works normally is acquired, and in view of each different fault condition, the swing angle deviator each time when a fault happens to the engine is detected; and finally, the basic condition equations which need to be met for realizing fault reconfiguration are used for calculating a specific form for a fault reconfiguration control law in each different fault condition. The rocket anti-fault ability is improved, and research on the high thrust liquid rocket is promoted.

The invention discloses an air distribution gear and an air automatic collection system comprising the air distribution gear. The air distribution gear is installed on an air distribution plate and isused for controlling on/off of a general air path and each branch air pipe. The air distribution gear comprises a reversing valve block installed in a reversing slot, and the reversing slot is formedin the air distribution plate; the reversing valve block is provided with a reversing notch slot and a communicating air hole; the top of the reversing valve block is assembled and fixed to one end of a valve rod, the other end of the valve rod is installed in a switching installation slot, and a maintaining sliding plate is fixed to the end, installed in the switching installation slot, of the valve rod; the valve rod can slide in an axial direction, and a valve rod compressed spring is installed on the part, located between the maintaining sliding plate and the bottom face of the inner sideof the switching installation slot, of the valve rod in a sleeving mode; and in an initial state, the reversing valve block is located at the most top of the reversing slot, the branch air pipes communicate with the general air path through the reversing notch slot, the communicating air hole in the reversing valve block is installed in the top of the reversing slot, so that the two ends of the communicating air hole are sealed by the inner wall of the reversing slot, and the space between the general air path in the part and a general air path in a next reversing slot is broken by the reversing valve block.

The invention discloses a method for backup of access points of Internet of Things. The method comprises the following steps of obtaining a backup access point of a first access point and backing up cache data of the first access point to the backup access point; when the first access point is detected to have a fault, taking a third access point as the backup access point of a second access point; and switching an Internet of Things terminal or a repeater connected to the first access point to the second access point and sending the cache data of the second access point as the third access point of the backup access point of the second access point. The invention also discloses a device for backup of the access points of the Internet of Things. According to the method and the device, the paralysis of the Internet of Things, which is caused by the failure of the access point, can be avoided, and the fault resistance of the Internet of Things is improved.

The invention relates to an instant communication system for an electronic mailbox. The instant communication system comprises a primary data communication network, secondary data communication networks, control terminals, a relay server, an electronic mailbox data server and a customer identification information verification server, wherein the primary data communication network is respectively interconnected with at least one secondary data communication network and a plurality of control terminals, and at least one of the electronic mailbox data server and the customer identification information verification server is respectively interconnected with the secondary data communication networks through the relay server. The communication method includes the following steps: building a communication network environment, building a server platform, and performing mailbox registration and instant communication. The scheme of the invention has the advantages of simple composition structure, flexible and convenient use, and high data communication stability and reliability, and has an active information push capability, so that the effects of effectively reducing the operation pressureof the electronic mailbox server and improving the operation stability and reliability of the electronic mailbox server while performing a large amount of data processing operations can be achieved.

The invention discloses a network device management system and method in a telecommunication management network, and relates to the field of network device management of communication devices. The system comprises a first network device A, a second network device B and a third network device A1, wherein the system further comprises a VLAN interface configuration module, an OSPF message processing module and an MCC message processing module. The method comprises the following steps: separately configuring virtual VLAN interfaces on the first network device A and the second network device B to form a virtual link; sending OSPF messages though the VLAN interfaces to perform neighbor negotiation, and creating a routing table entry for forwarding an MCC message; forwarding the MCC message from the first network device A to the second network device B, and forwarding the MCC message by the second network device B from a corresponding physical interface. By adoption of the network device management system and method, the network management stability can be improved, and the anti-fault ability of a double-node intersection ring network can be improved.

The invention relates to a method and device providing network self-healing protection, which is mainly consisted of: firstly, the service of selective receiving terminal is set to a multicast sending mode under a double sending selective receiving mode, then all the services corresponding to the operation source in the operation channel are switched to the corresponding protection source in the protection channel when fault occurs in the operatino channel. The invention solves the problem of failed protection due to the coexisted multi-self-healing protection, and provides a high reliable service transfer, meanwhile, the invention provides a protection and switch protocol for the self-healing protection technique wherein a broadcast mode is adopted by the service place, and provides a solution for the application of service place broadcast mode in the self-healing protection technique.

The embodiment of the invention discloses an Internet of Things based data backup method and device. The Internet of Things based data backup method comprises the steps of obtaining uplink data traffic of a second relay and a third relay which are backup relays of a first relay when the first relay in the Internet of Things is abnormal; comparing the uplink data traffic of the second relay with the uplink data traffic of the third relay; when the uplink data traffic of the second relay is greater than that of the third relay, backing up the service data currently cached by the first relay to the second relay to enable the second relay to load the service data; and building a connection relationship between an Internet of Thing terminal which has a connection relationship with the first relay with the third relay so as to cut off the connection relationship between the Internet of Thing terminal and the first relay. According to the technical scheme, the anti-fault capacity of the Internet of Things can be improved.