39results about How to "Flexible topology" patented technology

The method comprises: newly adding a communication scheduling layer into original data link layer of Ethernet; in relation to the standard channel using TCP / IP, newly adding a real time channel; according to the greatest common divisor of control cycle in the actual control area, using a three segmentation dividing principal to divide macro cycle into three time segmentations on time axis; the bus arbitration uses a approach of combining the distribution with the concentration, and uses a time slot distribution based scheduling approach to send the cyclic data relating to the realization of control function in the time segmentation, uses the centralized scheduling approach with priority controlling function to send the system data and non cyclic data in the time segmentation; all slave devices in the system keep the time consistence with the master device by using a clock synchronous algorithm; the logic addressing is made based on the device ID; realizing the real time Ethernet determinacy communication.

The invention discloses a design method of DCS controlled TTP / C bus controller catering to aeroengine. Considering the performance demands of the DCS system of aeroengines, the design method of TTP / C bus controller comprises the steps of general design of the TTP / C bus controller, data link layer design of the TTP / C bus controller, protocol service layer design of the TTP / C bus controller, communication network interface design of the TTP / C bus controller, and the state machine of the TTP / C bus controller. The controller designed by the method on the basis of field bus programmable gate array has the advantage of being light in weight, being low in cost, being simple in maintenance. At the same time the transmission bandwidth is high, the error tolerance is strong, and the bus use rate is high, thus satisfying the demands of the DCS system of aeroengine.

The invention relates to a high-availability industrial Ethernet redundancy method, which comprises the following steps: adding a link redundancy entity on an original data link layer of the Ethernet for managing the sending and receiving of data frames of the Ethernet; setting two network adapter drivers relative to an original protocol stack for managing two network adapter interfaces; connecting a double-connected node which comprises the link redundancy entity and the two network adapter drivers to two independent networks respectively through two network adapters; adding a redundancy control tracker for the data frames on the link redundancy entity for distinguishing the data frames with the same content; sending the data frames which have the same content and is provided with the redundancy control tracker to two mutually-independent networks by the double-connected node through the two network adapters; keeping effective frames and discarding copy frames; and setting up a node table. The method has the characteristics of transparency, self-healing property and compatibility and the like; and the reconstruction thereof is simple, and the safety performance of the system is increased so as to enable the system to have high usability.

The invention relates to an indoor optical fiber distribution system, comprising a multi-service access platform (MSAP), an optical switching unit (OSU) and an optical radiofrequency unit (ORU). The MSAP and the OSU are subjected to the two-way digital signal transmission through an optical fiber. In a down link, the MSAP transmits signals to the OSU by a broadcasting manner, and the OSU processes the signals and then transmits radiofrequency signals to the ORU by an optical fiber. The OSU can be connected with a plurality of low-power optical radiofrequency units so as to realize the multi-point coverage. The indoor optical fiber distribution system realizes the common accessing of multiple networks and multiple services, is beneficial to construction of a multi-access heterogeneous network and co-construction and sharing, solves the problem that the multiple networks do not exist simultaneously, realizes the large-scale networking in a networking mode, and meets the requirement of large-scene coverage.

The invention requests to protect an implantation-type nervous stimulation system of controlling wireless limb motions and a control method thereof, which relates to a technical field of human implantation-type medical devices. The system makes use of the principle of advanced wireless sensing network technology, constructs a star-type network and not limits to a wireless stimulation network of star-type network topology, and the topological structure is flexible and the extensibility is strong, and stimulation networks with different scales are constructed according to requirements of controlling of different limb motions; by adopting a wireless time synchronous protocol and the coordination work of synchronous dormancy and synchronous awaking of an external control terminal and an internal stimulation unit, the system realizes a multi-target implantation-type nerve stimulation method of wireless limb motion controlling, and the Burst working mode is low in power consumption and can prolong the service life of the internal stimulation unit greatly. The system and the control method thereof provide a novel stimulation device and a control method for the recovery treatment of nervous system diseases or patients of nervous system injury, and are beneficial to realize the controlling over more coordinate and natural limb motions in low trauma through the wireless synchronous controlling stimulation of multiple nerves and multiple muscles.

The invention discloses a method for binding a domain name and specific service, which comprises the following steps that: 1) a mapped domain name is generated for a user and specific service; 2) a service storage address corresponding to the domain name is set; 3) a service client requests the analysis of the domain name; 4) a domain name analysis server analyzes the domain name to the corresponding service storage address; and 5) the service client sends the request to the service storage address to acquire the specific service. The technical proposal maps each specific user and specific service to the specific domain name, and the subsequent access of the user is positioned to a preset server by analyzing the specific domain name, thereby achieving the aim of flexible network topology configuration and achieving complete and most effective load balance.

The invention discloses an elastic operation control method for an AC / DC hybrid distribution network. By establishing a distribution network elastic evaluation index, an energy storage model, a wind power and photovoltaic output model, and constructing a AC / DC distribution network timing sequence transfer model, overall modeling is performed. Since the model is a nonlinear mixed integer programming model and is difficult and inefficient to solve by an artificial intelligence algorithm or enumeration method. Therefore, the invention provides a greedy search algorithm for solving and optimizingthe model. When a fault occurs in the AC / DC hybrid distribution network, the provided model takes account of the transfer and control capabilities of the energy storage, transfers the loads in the faulted distribution network area in cooperation with distributed power sources such as wind power and photovoltaic power in the distribution area and the standby power supply capacity of an adjacent tieline, calculates the elastic index according to a transfer result, optimizes the output of each energy storage period by an improved particle swarm optimization algorithm to obtain an optimal energystorage output mode, and finally achieves the maximum elastic operation of the distribution network in the fault area.

The invention discloses a data flow delay guarantee strategy based on the chance of pairwise inter-flow network coding, comprising the following steps: a step of packet cache: an immediate layer protocol is implemented between an IP layer and an MAC layer, a packet arriving at the IP layer is cached, a virtual queue is set up for each data flow, and the chance of inter-data flow pairwise coding is mined; a step of queue information gathering: the number, weight, delay of data packets in each queue and the data flow pairwise coding relation are counted at the beginning of each dispatching time length; a step of packet scheduling: the optimal sending order and number of packets are calculated by an integer linear programming method; a step of code sending: the packets needing coding are coded, and the packets are sent to the interface of the MAC layer after a code head is added; and a step of ending the current scheduling: when the time of current scheduling expires, the method returns to step 1, and the data packet arriving at the IP layer during the current scheduling continues to be scheduled.

The invention relates to an intelligent helmet used in a fire rescue site. The intelligent helmet comprises a helmet body and is characterized in that the helmet body is provided with a top buffering layer and a middle buffering layer; the area, between the top buffering layer and the middle buffering layer, of the helmet body is an electronic device installation area; a master controller, a sensor and actuator module, a power module and a short-distance wireless communication module are arranged in the electronic device installation area; the sensor and the actuator module, the power module and the short-distance wireless communication module are all connected with the master controller; the area, on the lower front portions of the buffering layers, of the helmet body is provided with a near-infrared camera and a near-infrared LED illumination module which are connected with the master controller; the master controller further builds data communication with an ear canal barometric sensor worn on the head of a firefighter and an embedded OLED display module worn on the forearm of the firefighter. The other content of the technical scheme is a system application used for the intelligent helmet used in the fire rescue site.

The application relates to a light emitting diode driving circuit and a light emitting diode lighting device. The light emitting diode (LED) driving circuit comprises a detection circuit, a first-level converter, a first feedback loop, and a second feedback loop. The detection circuit detects whether the input of the driving circuit is low-frequency current or high-frequency current. The first-level converter converts the input of the driving circuit, and provides DC power suitable for LED. The first feedback loop is activated when the detection circuit detects that the input of the driving circuit is low-frequency current, the first feedback loop converts the current of an LED load into a feedback voltage and feeds back the feedback voltage to the first-level converter, the feedback voltage decreases when the current of the LED load is greater than a target value, and the feedback voltage increases when the current of the LED load is smaller than the target value. The second feedback loop is activated when the detection circuit detects that the input of the driving circuit is high-frequency current, the second feedback loop converts the current of the LED load into a feedback voltage and feeds back the feedback voltage to the first-level converter, the feedback voltage increases when the current of the LED load is greater than the target value, and the feedback voltage decreases when the current of the LED load is smaller than the target value.

The invention discloses a two-dimensional anisotropic grid cell measurement tensor field smoothing method. At present, no good smoothing method for the anisotropic grid measurement tensor exists. Themethod comprises: setting an initial anisotropy grid measurement tensor field of the aircraft wing shape on a triangular background grid of an aircraft wing shape geometric model area; performing logarithm operation on the anisotropic grid measurement tensor on each grid point; and secondly, establishing gradient constraints for limiting the change of the anisotropic grid measurement tensor, and smoothing the initial anisotropic grid measurement tensor field of the aircraft wing shape according to the gradient constraints, so as to establish a smooth transition mathematical model of the anisotropic grid measurement tensor field and obtain a smooth anisotropic grid measurement tensor field. According to the method, the aircraft wing shape measurement tensor field which changes violently isprocessed into the smooth measurement tensor field, so that the anisotropic grid quality and the numerical simulation precision are improved, and the finally generated aircraft wing shape grid units are high in quality and the number of the grid units is minimum.

The invention discloses a multi-agent interactive game power distribution network peak regulation operation management and control method and system, and relates to the technical field of alternatingcurrent and direct current power distribution network peak regulation management and control of a power system, and the method comprises the following steps: 1, constructing an interactive game modelof a power distribution network operator, an electric vehicle user and an energy storage operator; 2, according to the interactive game model constructed in the step 1, performing game among the three; 3, proving that the equilibrium value of the interactive game model exists and is unique; and 4, solving an equilibrium value of the interactive game model to judge whether the e-th round of game process reaches a game equilibrium state or not. The system comprises an AC / DC hybrid power distribution network peak regulation operation control model based on a multi-agent interactive game, and theAC / DC hybrid power distribution network peak regulation operation control model comprises a state monitoring module, a controllable unit control decision module, an information interaction module, a real-time electricity price decision module and a behavior module. The power supply capacity and the system safety of the system can be improved.

The invention discloses a voice-coil-motor-driven pilot servo valve control system and control method, belonging to the technical field of servo valve control. The voice-coil-motor-driven pilot servo valve control system comprises a servo valve control circuit, a computer, a servo valve, a pumping source, a sensor detection system and a motion actuator, wherein the computer is connected with a CAN (controller area network) bus interface circuit of the servo valve control circuit; a servo valve drive circuit of the servo valve control circuit and the pumping source are respectively connected with the servo valve; the sensor detection system comprises a pressure and flow sensor and a displacement and speed sensor; the servo valve is respectively connected with the motion actuator and the pressure and flow sensor; the motion actuator is connected with the displacement and speed sensor; and the pressure and flow sensor and the displacement and speed sensor are respectively connected with an MCU (microprogrammed control unit). The servo valve coil is driven by an H bridge drive circuit composed of two MOS (metal oxide semiconductor) tubes and two triodes, and thus, the voice-coil-motor-driven pilot servo valve control system has the characteristics of high control stability and high control accuracy.

The invention provides a numerical control machine tool magazine control method based on AN EtherCAT bus. The control system comprises an x-axis motor servo driver, a Y-axis motor servo driver, a Z-axis motor servo driver and a tool magazine motor driver, and further comprises the following steps that 1) a user sends a tool changing instruction through a PLC program of the numerical control system; 2) after the tool changing instruction is subjected to decoding processing, the instruction knife number is output and a tool changing macro program is called, a tool changing mark is set in the PLCprogram, and the position data to be moved by the tool magazine motor is output to a specified register after logical operation is carried out; and 3) an abnormal alarm program is activated when theuser tool changing instruction is abnormal, an alarm number set by the user is displayed on the system page, and alarm information is input; when the user tool changing instruction is not abnormal, the tool magazine is rotated to the instruction knife position, the tool changing and tool taking operation are executed by the numerical control machine tool, and the main program is returned after thetool changing process is ended. The method is convenient to use, simple in wiring and stable in operation.

The invention belongs to the technical field of optical fiber end face detection, and particularly relates to an optical fiber end face defect detection device and method for a visual internet of things. The optical fiber end face defect detection device for a visual internet of things comprises a sensing layer, a network layer and an application layer, the sensing layer comprises a light supplementing light source and a visual sensing unit, the light supplementing light source is used for supplementing light to an optical fiber end face, and the visual sensing unit is composed of a CCD image sensor and a microscopic amplification optical system; the network layer comprises a pre-processing unit, a transceiver unit and a wireless module, the pre-processing unit comprises a processor, the transceiver unit is a CC2530 chip, the application layer is a computer, the computer comprises a host, a display screen and a storage module, and the display screen and the storage module are both connected with the host; and the optical fiber end face image is transmitted to the computer for processing in a wireless transmission mode, a certain number of optical fiber end faces can be detected, and tedious processing steps and large manual errors are avoided.

The invention relates to a latent series capacitor compensation device. The latent series capacitor compensation device comprises a capacitor bank, an overvoltage protection device, a damping device and a bypass circuit breaker. The capacitor bank and the damping device are serially connected and then parallelly connected with the voltage protection device and the bypass circuit breaker; the capacitor bank and the damping device are connected with a power transmission line through a mode switching device Q1 and a mode switching device Q2 respectively; the latent series capacitor compensation device can be independently used as a conventional series compensation device or a latent series compensation device in a power system, or two or more latent series capacitor compensation devices can be used cooperatively. The latent series capacitor compensation device integrates functions of conventional series compensation and latent series compensation and can be used no matter the line is in normal operation or in fault.

The LED driving circuit includes: a detecting circuit that detects whether an input current of the driving circuit is low or high frequency; a first stage converter that converts the input of the driving circuit to provide a DC power suitable for the LED; a first feedback loop that is activated by a low frequency current, to convert a current from a LED load to a feedback voltage and feed it back to the first stage converter, wherein in the first feedback loop, the feedback voltage changes as a function of the current of the LED load; and a second feedback loop that is activated by high frequency current, to convert the current from the LED load to the feedback voltage and feed it back to the first stage converter, wherein in the second feedback loop, the feedback voltage changes as a function of the current of the LED load.

The invention discloses a single-phase grounding fault identification method for a small-current grounding system, and the method comprises the steps: enabling a controller to achieve the switching of each neutral point grounding resistor through controlling the switching-on and switching-off of each circuit breaker, and determining whether the neutral point grounding resistor is switched in or not according to the zero-sequence voltage of a bus; and determining the number of input neutral point grounding resistors according to the size of the outgoing line zero-sequence current, so that the fault current of each fault indicator is increased, the sensitivity of the fault indicator is improved, and a fault section is accurately positioned. The method solves the problems that in the prior art, a fault indicator is insufficient in sensitivity and inaccurate in fault section positioning, the sensitivity of the fault indicator is improved by changing the neutral point wiring mode, and the method has wide applicability and high feasibility.

The invention discloses an experiment teaching system comprising a teacher machine control table, a student experiment table system, a router and a switch, a water level measurer, a processing system,the router and the switch are connected in series, and the video distributor is located at the outlet of the teacher machine control table, the router is located at the outlet of a video signal device, and the switch is located at the outlet of the router, and one end of the student experiment table system is connected with the outlet end of the water level measurer, the other end of the video signal device is connected with the inlet end of the router, and the switch is connected with the outlet end of the router. The system is a network technology experiment teaching system which is comprehensive in equipment, convenient maintenance, flexible in topology, and high in integration degree, has the functions of teacher machine video broadcasting and network multimedia.

The indoor power supply is transmitted to each application place through a plug-in power supply bus groove, and the power supply is extended to each set application equipment, switch and socket through a plug-type power supply connection wire. The whole system has a flexible topological structure, fast and convenient installation and disassembly and high installation efficiency and provides strongsupport for indoor modular power supply. The components of the system use an all-metal shell which has good heat dissipation function and can realize the shielding effect and prevent electromagneticinterference to a certain extent; the plug-in installation method is used, the structure is compact and the contact is firm and the strong support can be provided for electricity safety, fire safety,protection safety and rodent prevention; and the whole system is convenient for fast installation and disassembly and can be reused and can save a large amount of cost for users and is quite suitablefor the modular indoor power supply requirements of modular household appliances and smart homes in the future.

The invention provides a robot joint actuator, an actuator module and a robot. The actuator comprises a motor, a motor control processor, a network communication processor and an Ethernet switch chip;the Ethernet switch chip is connected with the network communication processor and is connected with a first network port and a second network port, the first network port is used for connecting networking equipment or a second actuator, and the second network port is used for connecting a third actuator; the network communication processor is used for communication based on an Ethernet TCP / IP protocol; the motor control processor is connected with the network communication processor and generates a motor driving control signal based on a signal from the network communication processor; and the signal receiving ends of the first network port and the second network port are connected through a synchronizing signal line, the synchronizing signal line is further connected to the synchronizing signal input end of the network communication processor, the first network port receives network signals and synchronizing signals of external control equipment through a network connecting line, and the synchronizing signals are transmitted to the synchronization signal input end of the network communication processor through the synchronizing signal line.

The invention discloses an embedded unmanned aerial vehicle cluster simulation system based on a high-speed serial bus, which includes a comprehensive control computer and a plurality of simulation devices; each simulation device includes a cluster control module, a flight simulation module, and a 1394b bus module. The module is connected with the 1394b bus module, and is used to receive and analyze cluster control instructions by using the 1394b bus; the cluster control module is interconnected with the flight simulation module through a serial port, and is used to send the analyzed cluster control command to the flight simulation module command and receive the flight state; the flight simulation module runs the digital aircraft model and flight control logic, and is used to receive the swarm control command and calculate the flight state. Each simulation device includes multiple 1394b interfaces for communicating with the integrated control computer and other simulation devices. The invention can realize dynamic expansion of simulation nodes through a flexible interconnection structure, has high integration, and is convenient for portable and mobile deployment.

The invention discloses a topological structure of a combined bidirectional DC / AC (direct current / alternating current) converter, and belongs to the technical field of power conversion. The topological structure is characterized in that the topological structure comprises three-phase circuits which are the same with one another; each phase comprises an isolating half-bridge DC / DC converter and a cascading H-bridge DC / AC converter; the output terminal of the isolating half-bridge DC / DC converter is connected with a first capacitor (C1) in parallel and then is served as the input terminal of the cascading H-bridge DC / AC converter; each stage of H bridge is connected with an independent isolating half-bridge DC / DC converter; and EMTDC electro-magnetic transient simulation performed to circuit topology under typical parameters shows that the topological structure has a high voltage matching capability, and bidirectional flow of energy can be realized through phase-shifting control. The topological structure can be applied to occasions of high-power adjustment based on battery energy storage, energy storage power station, smooth renewable energy source generated output power, frequency and voltage adjustment in microgrid and the like, and has a broad application prospect.

The invention relates to a latent series capacitor compensation device. The latent series capacitor compensation device comprises a capacitor bank, an overvoltage protection device, a damping device and a bypass circuit breaker. The capacitor bank and the damping device are serially connected and then parallelly connected with the voltage protection device and the bypass circuit breaker; the capacitor bank and the damping device are connected with a power transmission line through a mode switching device Q1 and a mode switching device Q2 respectively; the latent series capacitor compensation device can be independently used as a conventional series compensation device or a latent series compensation device in a power system, or two or more latent series capacitor compensation devices can be used cooperatively. The latent series capacitor compensation device integrates functions of conventional series compensation and latent series compensation and can be used no matter the line is in normal operation or in fault.

The invention relates to a four-axis integrated servo driver and a servo drive control method. It mainly integrates the control and driving of four-way motor, so as to effectively reduce the number ofmulti-axis integrated master control chips, simplify the control circuit structure, and effectively reduce the production and maintenance costs. The structure of the controller mainly includes control circuit and power circuit. The control circuit comprises a first substrate, an MCU chip arranged on the first substrate, an encoder interface module, a communication module, a low-voltage power conversion module and a first row of pins. The power circuit comprises a second substrate, a rectifier and power soft start module arranged on the second substrate, a power drive module, a voltage conditioning sampling module, a brake control module, a current sampling chip, a current conditioning module, an energy storage capacitor and a second row of pins. The power circuit comprises a second substrate, a rectifier and power soft start module arranged on the second substrate, a power drive module, a voltage conditioning sampling module, a brake control module, a current sampling chip, a currentconditioning module, an energy storage capacitor and a second row of pins.

The invention discloses a voice-coil-motor-driven pilot servo valve control system and control method, belonging to the technical field of servo valve control. The voice-coil-motor-driven pilot servo valve control system comprises a servo valve control circuit, a computer, a servo valve, a pumping source, a sensor detection system and a motion actuator, wherein the computer is connected with a CAN (controller area network) bus interface circuit of the servo valve control circuit; a servo valve drive circuit of the servo valve control circuit and the pumping source are respectively connected with the servo valve; the sensor detection system comprises a pressure and flow sensor and a displacement and speed sensor; the servo valve is respectively connected with the motion actuator and the pressure and flow sensor; the motion actuator is connected with the displacement and speed sensor; and the pressure and flow sensor and the displacement and speed sensor are respectively connected with an MCU (microprogrammed control unit). The servo valve coil is driven by an H bridge drive circuit composed of two MOS (metal oxide semiconductor) tubes and two triodes, and thus, the voice-coil-motor-driven pilot servo valve control system has the characteristics of high control stability and high control accuracy.

The invention relates to the field of robot control, in particular to a control system and method based on EtherCAT communication and a double-shaft driving control device, and the system comprises a master station and a slave station which are in data communication through an EtherCAT bus; the master station comprises an upper-layer controller, the upper-layer controller is used for outputting control instructions to the slave station, and the control instructions comprise a speed instruction and an angle position instruction; the slave station comprises a double-shaft servo driver with an EtherCAT network interface and a servo motor, the servo motor comprises a steering motor and a traction motor, and the double-shaft servo driver receives the control instruction and controls the traction motor and the steering motor to operate; the double-shaft servo driver is further used for collecting the speed and angle positions of the steering motor and the traction motor and feeding the speed and angle positions back to the upper-layer controller through the EtherCAT bus. Control instructions can be sent to the traction motor and the steering motor at the same time, the communication delay time is shortened, and the dynamic response capacity and the data transmission capacity of the whole control system are improved.

The invention discloses an unmanned aerial vehicle swarm intensive continuous launching control system based on a high-speed optical fiber bus. The unmanned aerial vehicle swarm intensive continuous launching control system comprises a swarm launching bin, N unmanned aerial vehicles, an optical fiber transponder, a rocket ignition control device, N rocket boosters and a ground control station. The bee colony launching bin is provided with N launching bin cells, and each bin cell is loaded with an unmanned aerial vehicle; the optical fiber transponder is installed in the bee colony launching bin and is interconnected with all the unmanned aerial vehicles through a high-speed optical fiber bus. The rocket ignition control device is connected to the optical fiber transponder through a high-speed optical fiber bus to realize interconnection networking with the unmanned aerial vehicle; the N rocket boosters are installed at the tail of the unmanned aerial vehicle and connected to the rocket ignition control device through ignition wires. And the ground control station performs information transmission with the unmanned aerial vehicle through wireless communication. The system can solve the influence of the problems of data multi-source, electromagnetic interference, information error codes, complex links and the like on rocket launching control, and ensures that the unmanned aerial vehicle swarm combat system reliably and stably carries out unmanned aerial vehicle continuous dense launching.

The invention discloses an experimental teaching system. The experimental teaching system comprises a teacher machine console, a student experiment table system, a router and a switch; a fluviometer,a processing system, the router and the switch are connected in series; a video distributor is located at the exit of the teacher machine console; the router is located at the exit of a video signalizer; the switch is located at the exit of the router; one end of the student experiment table system is connected with the exit end of the fluviometer; the other end of the video signalizer is connected with the entry end of the router; and the switch is connected with the exit end of the router. The invention relates to a network technology experiment teaching system which is comprehensive in equipment, convenient to maintain, flexible in topology and high in integration degree, and has a teacher machine video broadcasting and network multimedia function